99 files changed, 34333 insertions, 0 deletions

diff --git a/progs/demos/.cvsignore b/progs/demos/.cvsignore
new file mode 100644
index 000000000..2b8a22512
--- /dev/null
+++ b/progs/demos/.cvsignore
@@ -0,0 +1,46 @@
+.cvsignore
+arbfplight
+arbocclude
+bounce
+clearspd
+cubemap
+drawpix
+fire
+fplight
+gamma
+gears
+geartrain
+glinfo
+gloss
+gltestperf
+glutfx
+ipers
+isosurf
+lodbias
+morph3d
+multiarb
+occlude
+osdemo
+paltex
+pixeltex
+pointblast
+ray
+readpix
+readtex.c
+readtex.h
+reflect
+renormal
+shadowtex
+spectex
+stex3d
+teapot
+terrain
+tessdemo
+texcyl
+texdown
+texenv
+texobj
+trispd
+tunnel
+tunnel2
+winpos
diff --git a/progs/demos/Makefile b/progs/demos/Makefile
new file mode 100644
index 000000000..4bd72d8a5
--- /dev/null
+++ b/progs/demos/Makefile
@@ -0,0 +1,115 @@
+# progs/demos/Makefile
+
+TOP = ../..
+include $(TOP)/configs/current
+
+INCDIR = $(TOP)/include
+
+OSMESA_LIBS = -L$(LIB_DIR) -lglut -lOSMesa -lGLU -lGL $(APP_LIB_DEPS)
+
+OSMESA16_LIBS = -L$(LIB_DIR) -lglut -lOSMesa16 -lGLU -lGL $(APP_LIB_DEPS)
+
+OSMESA32_LIBS = -L$(LIB_DIR) -lglut -lOSMesa32 -lGLU -lGL $(APP_LIB_DEPS)
+
+LIB_DEP = $(LIB_DIR)/$(GL_LIB_NAME) $(LIB_DIR)/$(GLU_LIB_NAME) $(LIB_DIR)/$(GLUT_LIB_NAME)
+
+PROGS = \
+	arbfplight \
+	arbocclude \
+	bounce \
+	clearspd \
+	cubemap \
+	drawpix \
+	fire \
+	fogcoord \
+	fplight \
+	gamma \
+	gears \
+	geartrain \
+	glinfo \
+	gloss \
+	gltestperf \
+	glutfx \
+	isosurf \
+	ipers \
+	lodbias \
+	morph3d \
+	multiarb \
+	occlude \
+	paltex \
+	pixeltex \
+	pointblast \
+	ray \
+	readpix \
+	reflect \
+	renormal \
+	shadowtex \
+	spectex \
+	spriteblast \
+	stex3d \
+	teapot \
+	terrain \
+	tessdemo \
+	texcyl \
+	texdown \
+	texenv \
+	texobj \
+	trispd \
+	tunnel \
+	tunnel2 \
+	winpos
+
+
+##### RULES #####
+
+.SUFFIXES:
+.SUFFIXES: .c
+
+
+# make executable from .c file:
+.c: $(LIB_DEP) readtex.o
+	$(CC) -I$(INCDIR) $(CFLAGS) $< readtex.o $(APP_LIB_DEPS) -o $@
+
+
+##### TARGETS #####
+
+default: readtex.o $(PROGS)
+
+
+readtex.c: $(TOP)/progs/util/readtex.c
+	cp $< .
+
+readtex.h: $(TOP)/progs/util/readtex.h
+	cp $< .
+
+readtex.o: readtex.c readtex.h
+	$(CC) -c -I$(INCDIR) $(CFLAGS) readtex.c
+
+
+showbuffer.c: $(TOP)/progs/util/showbuffer.c
+	cp $< .
+
+showbuffer.h: $(TOP)/progs/util/showbuffer.h
+	cp $< .
+
+showbuffer.o: showbuffer.c showbuffer.h
+	$(CC) -c -I$(INCDIR) $(CFLAGS) showbuffer.c
+
+
+reflect: reflect.o showbuffer.o readtex.o
+	$(CC) -I$(INCDIR) $(CFLAGS) reflect.o showbuffer.o readtex.o $(APP_LIB_DEPS) -o $@
+
+reflect.o: reflect.c showbuffer.h
+	$(CC) -c -I$(INCDIR) $(CFLAGS) reflect.c
+
+
+shadowtex: shadowtex.o showbuffer.o
+	$(CC) -I$(INCDIR) $(CFLAGS) shadowtex.o showbuffer.o $(APP_LIB_DEPS) -o $@
+
+shadowtex.o: shadowtex.c showbuffer.h
+	$(CC) -c -I$(INCDIR) $(CFLAGS) shadowtex.c
+
+clean:
+	-rm -f $(PROGS)
+	-rm -f *.o *~
+	-rm -f readtex.[ch] showbuffer.[ch]
diff --git a/progs/demos/Makefile.cygnus b/progs/demos/Makefile.cygnus
new file mode 100644
index 000000000..0efc1ab0c
--- /dev/null
+++ b/progs/demos/Makefile.cygnus
@@ -0,0 +1,87 @@
+
+# Mesa 3-D graphics library
+# Version:  3.3
+# Copyright (C) 1995-2000  Brian Paul
+
+
+# Makefile for demo programs for cygnus
+# Stephane Rehel (rehel@worldnet.fr) April 13 1997
+
+
+
+##### MACROS #####
+
+INCDIR = ../include
+LIBDIR = ../lib
+
+GL_LIBS = -L$(LIBDIR) -lglut -lMesaGLU -lMesaGL -lm $(WLIBS)
+
+LIB_DEP = $(LIBDIR)/$(GL_LIB) $(LIBDIR)/$(GLU_LIB) $(LIBDIR)/$(GLUT_LIB)
+
+PROGS = bounce \
+	clearspd \
+	cubemap \
+	drawpix \
+	fire \
+	gamma \
+	gears \
+	geartrain \
+	glinfo \
+	gloss \
+	gltestperf \
+	glutfx \
+	isosurf \
+	ipers \
+	lodbias \
+	morph3d \
+	multiarb \
+	occlude \
+	osdemo \
+	paltex \
+	pixeltex \
+	pointblast \
+	ray \
+	readpix \
+	reflect \
+	renormal \
+	spectex \
+	stex3d \
+	teapot \
+	terrain \
+	tessdemo \
+	texcyl \
+	texdown \
+	texenv \
+	texobj \
+	trispd \
+	tunnel \
+	tunnel2 \
+	winpos
+
+
+##### RULES #####
+
+.SUFFIXES:
+.SUFFIXES: .c
+
+.c: $(LIB_DEP)
+	$(CC) -I$(INCDIR) -I../util $(CFLAGS) $< $(GL_LIBS) -o $@
+
+
+##### TARGETS #####
+
+default:
+	@echo "Specify a target configuration"
+
+clean:
+	-rm *.o *~
+
+realclean:
+	-rm $(PROGS:=.exe)
+	-rm *.o *~
+
+targets: $(PROGS)
+
+include ../Make-config
+
+
diff --git a/progs/demos/README b/progs/demos/README
new file mode 100644
index 000000000..a3d0c18bb
--- /dev/null
+++ b/progs/demos/README
@@ -0,0 +1,230 @@
+INTRODUCTION
+------------
+
+This directory is usually included in the Mesa demos distribution or
+in the GLUT distribution.
+
+I have written the demos included in this directory mainly for showing
+the capabilities of the Mesa library when using the Voodoo driver.
+However all the demos are written using the GLUT and OpenGL so they
+work with any GLUT/OpenGL platform (tested: Linux+Mesa+Voodoo driver,
+Linux+Mesa+X11 driver, Win95+Mesa+Voodoo driver and SGI Onyx IR thanks
+to Mark Kilgard).
+
+All the demos make an heavy use of texture mapping, blending, etc. so
+you _need_ some kind of hardware support for the OpenGL otherwise they
+will run at ~1fps. You need also a OpenGL 1.1 compliant library.
+
+You can find some screenshot of these demos at
+http://www-hmw.caribel.pisa.it/fxmesa/fxdemos.hmtl
+
+Write me if you find some bug in the demos.
+
+David Bucciarelli (tech.hmw@plus.it)
+
+Humanware s.r.l.
+Via XXIV Maggio 62
+Pisa, Italy
+Tel./Fax +39-50-554108
+email: info.hmw@plus.it
+www: www-hmw.caribel.pisa.it
+
+
+A BRIEF DESCRIPTION OF THE DEMOS
+--------------------------------
+
+
+IPERS
+-----
+
+Sources: ipers.c image.c
+
+A nice spinning fractal object.
+
+
+RAY
+---
+
+Sources: ray.c
+
+I'm using ray tracing to dynamically generate texture maps with
+specular, diffuse, shadows, and mirror colors. Each frame the texture
+maps of the plane and of the sphere are partially updated.  With this
+technique you can obtain true mirrors, shadows, specular highlights,
+bump mapping, etc. in realtime.  This demo is really CPU intensive
+(~25fps on a PentiumII@300MHz with a Pure3D).  Support on-the-fly
+switching between fullscreen and in-window rendering under Linux/Mesa
+(start your X server in 16 bpp mode and press the spacebar).
+
+
+TUNNEL
+------
+
+Sources: tunnel.c image.c sources.c
+Data: bw.rgb tile.rgb
+
+The model was designed and prelighted with Alias|Wavefront
+PowerAnimator V8. Triangle strips were built with a tool written by me
+and then statically included in the sources.  This demo doesn't
+require the ZBuffer and use antialiased polygons.  Support on-the-fly
+switching between fullscreen and in-window rendering under Linux/Mesa
+(start your X server in 16 bpp mode and press the spacebar).
+
+
+TUNNEL2
+------
+
+Sources: tunnel2.c image.c sources.c
+Data: bw.rgb tile.rgb
+
+The some tunnel demo but with two output channels. A nice
+example of the Mesa/Voodoo support for multiple boards in
+the some PC.
+
+
+TEAPOT
+------
+
+Sources: teapot.c image.c dteapot.c shadow.c
+Data: bw.rgb tile.rgb
+
+The shadow is drawn projecting the teapot geometry over the plane. All
+other light effects are drawn using the standard OpenGL capabilities.
+Support on-the-fly switching between fullscreen and in-window
+rendering under Linux/Mesa (start your X server in 16 bpp mode and
+press the spacebar).
+
+
+FIRE
+----
+
+Sources: fire.c image.c
+Data: s128.rgb tree2.rgb
+
+The demo use a small particle system to draw some nice visual effect.
+You can interactively change many parameters of the particle system
+and you can choose the number of particles at the startup ('fire
+4000').  This demo should be called fountain.  Support on-the-fly
+switching between fullscreen and in-window rendering under Linux/Mesa
+(start your X server in 16 bpp mode and press the spacebar).
+
+
+TERRAIN
+-------
+
+Sources: mesaland.c
+
+This demo is base on another demo written by Mikael SkiZoWalker.  I
+have added the capabilities to freely fly around, view culling and
+some nice color.  Support on-the-fly switching between fullscreen and
+in-window rendering under Linux/Mesa (start your X server in 16 bpp
+mode and press the spacebar).
+
+
+GLTEST
+------
+
+Sources: gltest.c
+
+This is a simple benchmark suite that I'm using in the development of
+the Mesa/Voodoo driver. Type 'gltest >my.res' and you will get some
+data about the performances of your OpenGL. Follow the results with my
+PC (Linux+Mesa-2.6+PentiumII@300MHz+Pure3D):
+
+Simple Points
+587900.080674 Pnts/sec
+
+Smooth Lines
+SIZE=480 => 39007.426183 Lins/sec
+SIZE=250 => 74575.016485 Lins/sec
+SIZE=100 => 179734.882409 Lins/sec
+SIZE=050 => 183987.795297 Lins/sec
+SIZE=025 => 183820.086309 Lins/sec
+
+
+ZSmooth Triangles
+SIZE=480 => 784.954997 Tris/sec
+SIZE=250 => 2862.325889 Tris/sec
+SIZE=100 => 17779.492938 Tris/sec
+SIZE=050 => 159339.829844 Tris/sec
+SIZE=025 => 428602.984008 Tris/sec
+
+
+ZSmooth Tex Blend Triangles
+SIZE=480 => 784.473931 Tris/sec
+SIZE=250 => 2853.781513 Tris/sec
+SIZE=100 => 17598.252146 Tris/sec
+SIZE=050 => 152632.578337 Tris/sec
+SIZE=025 => 377584.760048 Tris/sec
+
+
+ZSmooth Tex Blend TMesh Triangles
+SIZE=400 => 563.900695 Tris/sec, MPixel Fill/sec: 45.112056
+SIZE=250 => 1449.777225 Tris/sec, MPixel Fill/sec: 45.305538
+SIZE=100 => 8702.869121 Tris/sec, MPixel Fill/sec: 43.514346
+SIZE=050 => 31896.867466 Tris/sec, MPixel Fill/sec: 39.871084
+SIZE=025 => 114037.262894 Tris/sec, MPixel Fill/sec: 35.636645
+SIZE=010 => 220494.235839 Tris/sec, MPixel Fill/sec: 11.024712
+SIZE=005 => 225615.506651 Tris/sec, MPixel Fill/sec: 2.820194
+SIZE=002 => 225607.681439 Tris/sec, MPixel Fill/sec: 0.451215
+
+
+Color/Depth Buffer Clears
+295.042474 Clrs/sec, MPixel Fill/sec: 90.553256
+
+
+Follow the results with my
+PC (Linux+Mesa-3.0beta5+PentiumII@300MHz+Voodoo2):
+
+
+Simple Points
+1620113.525130 Pnts/sec
+
+Smooth Lines
+SIZE=480 => 73841.166065 Lins/sec
+SIZE=250 => 140794.035316 Lins/sec
+SIZE=100 => 344185.242157 Lins/sec
+SIZE=050 => 420399.008289 Lins/sec
+SIZE=025 => 420261.389773 Lins/sec
+
+
+ZSmooth Triangles
+SIZE=480 => 1434.668506 Tris/sec
+SIZE=250 => 5228.449614 Tris/sec
+SIZE=100 => 46603.815842 Tris/sec
+SIZE=050 => 325757.045961 Tris/sec
+SIZE=025 => 589022.403336 Tris/sec
+
+
+ZSmooth Tex Blend Triangles
+SIZE=480 => 1414.900041 Tris/sec
+SIZE=250 => 5006.055235 Tris/sec
+SIZE=100 => 43602.252031 Tris/sec
+SIZE=050 => 303497.092692 Tris/sec
+SIZE=025 => 517087.428669 Tris/sec
+
+
+ZSmooth Tex Blend TMesh Triangles
+SIZE=400 => 1023.273112 Tris/sec, MPixel Fill/sec: 81.861849
+SIZE=250 => 2595.692121 Tris/sec, MPixel Fill/sec: 81.115379
+SIZE=100 => 15788.198912 Tris/sec, MPixel Fill/sec: 78.940995
+SIZE=050 => 58784.121300 Tris/sec, MPixel Fill/sec: 73.480152
+SIZE=025 => 244233.873481 Tris/sec, MPixel Fill/sec: 76.323085
+SIZE=010 => 474995.004191 Tris/sec, MPixel Fill/sec: 23.749750
+SIZE=005 => 475124.354163 Tris/sec, MPixel Fill/sec: 5.939054
+SIZE=002 => 474959.089503 Tris/sec, MPixel Fill/sec: 0.949918
+
+
+Color/Depth Buffer Clears
+478.654830 Clrs/sec, MPixel Fill/sec: 146.906826
+
+
+PALTEX and GLBPALTX
+-------------------
+
+Sources: paltex.c and glbpaltx.c
+
+The PALTEX example was written by Brian Paul and it shows the
+capabilities of the GL_EXT_paletted_texture extension.  I have written
+the other example in order to show the capabilities of the
+gl3DfxSetPaletteEXT() (it used only by GLQuake and Quake2).
diff --git a/progs/demos/Windows/all.dsp b/progs/demos/Windows/all.dsp
new file mode 100644
index 000000000..b47283c58
--- /dev/null
+++ b/progs/demos/Windows/all.dsp
@@ -0,0 +1,101 @@
+# Microsoft Developer Studio Project File - Name="all" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Application" 0x0101

+

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+

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diff --git a/progs/demos/Windows/bounce.dsp b/progs/demos/Windows/bounce.dsp
new file mode 100644
index 000000000..0510e77d9
--- /dev/null
+++ b/progs/demos/Windows/bounce.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="bounce" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

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+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

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+!MESSAGE Possible choices for configuration are:

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index 000000000..220a3a0df
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new file mode 100644
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index 000000000..57003e616
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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../gears.exe" /pdbtype:sept

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index 000000000..8dee77de4
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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../geartrain.exe"

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../geartrain.exe" /pdbtype:sept

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new file mode 100644
index 000000000..d9d61eb42
--- /dev/null
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+# Microsoft Developer Studio Project File - Name="glinfo" - Package Owner=<4>

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../glinfo.exe" /pdbtype:sept

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new file mode 100644
index 000000000..402d291f4
--- /dev/null
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+# Microsoft Developer Studio Project File - Name="gloss" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../gloss.exe"

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../gloss.exe" /pdbtype:sept

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new file mode 100644
index 000000000..e50662015
--- /dev/null
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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../gltestperf.exe"

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../gltestperf.exe" /pdbtype:sept

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new file mode 100644
index 000000000..90eca930d
--- /dev/null
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+# ** DO NOT EDIT **

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+CFG=glutfx - Win32 Debug

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+# Begin Project

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../glutfx.exe"

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../glutfx.exe" /pdbtype:sept

+# Begin Special Build Tool

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diff --git a/progs/demos/Windows/ipers.dsp b/progs/demos/Windows/ipers.dsp
new file mode 100644
index 000000000..430f1b625
--- /dev/null
+++ b/progs/demos/Windows/ipers.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="ipers" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

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+CFG=ipers - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../ipers.exe"

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../ipers.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

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+# Begin Target

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+# Name "ipers - Win32 Release"

+# Name "ipers - Win32 Debug"

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diff --git a/progs/demos/Windows/isosurf.dsp b/progs/demos/Windows/isosurf.dsp
new file mode 100644
index 000000000..1c59d4008
--- /dev/null
+++ b/progs/demos/Windows/isosurf.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="isosurf" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=isosurf - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "isosurf.mak".

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+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

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+!MESSAGE NMAKE /f "isosurf.mak" CFG="isosurf - Win32 Debug"

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+!MESSAGE Possible choices for configuration are:

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+# Begin Project

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../isosurf.exe"

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../isosurf.exe" /pdbtype:sept

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diff --git a/progs/demos/Windows/loadbias.dsp b/progs/demos/Windows/loadbias.dsp
new file mode 100644
index 000000000..ed51960e4
--- /dev/null
+++ b/progs/demos/Windows/loadbias.dsp
@@ -0,0 +1,112 @@
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+# Microsoft Developer Studio Generated Build File, Format Version 6.00

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../lodbias.exe"

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../lodbias.exe" /pdbtype:sept

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new file mode 100644
index 000000000..247dbf03d
--- /dev/null
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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../morph3d.exe"

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../morph3d.exe" /pdbtype:sept

+# Begin Special Build Tool

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diff --git a/progs/demos/Windows/multiarb.dsp b/progs/demos/Windows/multiarb.dsp
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index 000000000..57c32deb2
--- /dev/null
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+# Microsoft Developer Studio Project File - Name="multiarb" - Package Owner=<4>

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+# ** DO NOT EDIT **

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../multiarb.exe"

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../multiarb.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

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+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

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new file mode 100644
index 000000000..ca4afa579
--- /dev/null
+++ b/progs/demos/Windows/occlude.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="occlude" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=occlude - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "occlude.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

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+!MESSAGE Possible choices for configuration are:

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+!MESSAGE "occlude - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "occlude - Win32 Debug" (based on "Win32 (x86) Console Application")

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+# Begin Project

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+!IF  "$(CFG)" == "occlude - Win32 Release"

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+# PROP BASE Use_MFC 0

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+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

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+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../occlude.exe"

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+!ELSEIF  "$(CFG)" == "occlude - Win32 Debug"

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../occlude.exe" /pdbtype:sept

+# Begin Special Build Tool

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+# Name "occlude - Win32 Release"

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diff --git a/progs/demos/Windows/osdemo.dsp b/progs/demos/Windows/osdemo.dsp
new file mode 100644
index 000000000..ccaa6d2b4
--- /dev/null
+++ b/progs/demos/Windows/osdemo.dsp
@@ -0,0 +1,112 @@
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+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

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+CFG=osdemo - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

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+!MESSAGE Possible choices for configuration are:

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+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB ../../../lib/OSMESA32.LIB /nologo /subsystem:console /machine:I386 /out:"../osdemo.exe"

+# Begin Special Build Tool

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+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB ../../../lib/OSMESA32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../osdemo.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

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+# Begin Target

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+# Name "osdemo - Win32 Release"

+# Name "osdemo - Win32 Debug"

+# Begin Group "Source Files"

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+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

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diff --git a/progs/demos/Windows/paltex.dsp b/progs/demos/Windows/paltex.dsp
new file mode 100644
index 000000000..efc638421
--- /dev/null
+++ b/progs/demos/Windows/paltex.dsp
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+# Microsoft Developer Studio Project File - Name="paltex" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=paltex - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "paltex.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "paltex.mak" CFG="paltex - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "paltex - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "paltex - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

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+CPP=cl.exe

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+

+!IF  "$(CFG)" == "paltex - Win32 Release"

+

+# PROP BASE Use_MFC 0

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+# PROP BASE Intermediate_Dir "Release"

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+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../paltex.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

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+# End Special Build Tool

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+!ELSEIF  "$(CFG)" == "paltex - Win32 Debug"

+

+# PROP BASE Use_MFC 0

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+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

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+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../paltex.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

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+# Begin Target

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+# Name "paltex - Win32 Release"

+# Name "paltex - Win32 Debug"

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+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

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+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

+# End Target

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diff --git a/progs/demos/Windows/pixeltex.dsp b/progs/demos/Windows/pixeltex.dsp
new file mode 100644
index 000000000..d09f9f312
--- /dev/null
+++ b/progs/demos/Windows/pixeltex.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="pixeltex" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=pixeltex - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "pixeltex.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "pixeltex.mak" CFG="pixeltex - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

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+!MESSAGE "pixeltex - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "pixeltex - Win32 Debug" (based on "Win32 (x86) Console Application")

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+# Begin Project

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+!IF  "$(CFG)" == "pixeltex - Win32 Release"

+

+# PROP BASE Use_MFC 0

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+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../util" /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../pixeltex.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

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+!ELSEIF  "$(CFG)" == "pixeltex - Win32 Debug"

+

+# PROP BASE Use_MFC 0

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+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

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+# ADD BASE RSC /l 0x409 /d "_DEBUG"

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../pixeltex.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

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+

+!ENDIF 

+

+# Begin Target

+

+# Name "pixeltex - Win32 Release"

+# Name "pixeltex - Win32 Debug"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

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+SOURCE=..\pixeltex.c

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+

+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

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diff --git a/progs/demos/Windows/pointblast.dsp b/progs/demos/Windows/pointblast.dsp
new file mode 100644
index 000000000..7be695839
--- /dev/null
+++ b/progs/demos/Windows/pointblast.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="pointblast" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=pointblast - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "pointblast.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "pointblast.mak" CFG="pointblast - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "pointblast - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "pointblast - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

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+CPP=cl.exe

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+

+!IF  "$(CFG)" == "pointblast - Win32 Release"

+

+# PROP BASE Use_MFC 0

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+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../pointblast.exe"

+# Begin Special Build Tool

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+# End Special Build Tool

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+!ELSEIF  "$(CFG)" == "pointblast - Win32 Debug"

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+# PROP BASE Use_MFC 0

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+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../pointblast.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

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+# Begin Target

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+# Name "pointblast - Win32 Release"

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+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

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+SOURCE=..\pointblast.c

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diff --git a/progs/demos/Windows/rain.dsp b/progs/demos/Windows/rain.dsp
new file mode 100644
index 000000000..7e380e66a
--- /dev/null
+++ b/progs/demos/Windows/rain.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="rain" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=rain - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "rain.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

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+!MESSAGE NMAKE /f "rain.mak" CFG="rain - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "rain - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "rain - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

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+# Begin Project

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+CPP=cl.exe

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+

+!IF  "$(CFG)" == "rain - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

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+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../util" /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

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+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../rain.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

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+# End Special Build Tool

+

+!ELSEIF  "$(CFG)" == "rain - Win32 Debug"

+

+# PROP BASE Use_MFC 0

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+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../rain.exe" /pdbtype:sept

+# Begin Special Build Tool

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+# Begin Target

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+# Name "rain - Win32 Release"

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diff --git a/progs/demos/Windows/ray.dsp b/progs/demos/Windows/ray.dsp
new file mode 100644
index 000000000..dfa26e775
--- /dev/null
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+# ** DO NOT EDIT **

+

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+

+CFG=ray - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

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+!MESSAGE You can specify a configuration when running NMAKE

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+!MESSAGE Possible choices for configuration are:

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+!MESSAGE "ray - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "ray - Win32 Debug" (based on "Win32 (x86) Console Application")

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+# Begin Project

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+!IF  "$(CFG)" == "ray - Win32 Release"

+

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+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

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+# ADD BASE RSC /l 0x409 /d "NDEBUG"

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+# ADD BASE BSC32 /nologo

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../ray.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

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+# End Special Build Tool

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+!ELSEIF  "$(CFG)" == "ray - Win32 Debug"

+

+# PROP BASE Use_MFC 0

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+# ADD BASE RSC /l 0x409 /d "_DEBUG"

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+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../ray.exe" /pdbtype:sept

+# Begin Special Build Tool

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+# Name "ray - Win32 Release"

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new file mode 100644
index 000000000..8097d1062
--- /dev/null
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+# Microsoft Developer Studio Project File - Name="readpix" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

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+# TARGTYPE "Win32 (x86) Console Application" 0x0103

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+CFG=readpix - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

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+!MESSAGE Possible choices for configuration are:

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+# Begin Project

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+# ADD BASE RSC /l 0x409 /d "NDEBUG"

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+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../readpix.exe"

+# Begin Special Build Tool

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+!ELSEIF  "$(CFG)" == "readpix - Win32 Debug"

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+# PROP BASE Use_MFC 0

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../readpix.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

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+# Begin Target

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+# Name "readpix - Win32 Release"

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+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

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+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

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diff --git a/progs/demos/Windows/reflect.dsp b/progs/demos/Windows/reflect.dsp
new file mode 100644
index 000000000..fa09700af
--- /dev/null
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+# Microsoft Developer Studio Project File - Name="reflect" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

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+CFG=reflect - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

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+!MESSAGE NMAKE /f "reflect.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

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+!MESSAGE NMAKE /f "reflect.mak" CFG="reflect - Win32 Debug"

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+!MESSAGE Possible choices for configuration are:

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+!MESSAGE "reflect - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "reflect - Win32 Debug" (based on "Win32 (x86) Console Application")

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+# Begin Project

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+!IF  "$(CFG)" == "reflect - Win32 Release"

+

+# PROP BASE Use_MFC 0

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+# ADD CPP /nologo /W3 /GX /O2 /I "../../util" /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

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+# ADD BASE BSC32 /nologo

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../reflect.exe"

+# Begin Special Build Tool

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+!ELSEIF  "$(CFG)" == "reflect - Win32 Debug"

+

+# PROP BASE Use_MFC 0

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../reflect.exe" /pdbtype:sept

+# Begin Special Build Tool

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+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

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+!ENDIF 

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+# Begin Target

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+# Name "reflect - Win32 Release"

+# Name "reflect - Win32 Debug"

+# Begin Group "Source Files"

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+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

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+

+SOURCE=..\reflect.c

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+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

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diff --git a/progs/demos/Windows/renormal.dsp b/progs/demos/Windows/renormal.dsp
new file mode 100644
index 000000000..4d72e88d8
--- /dev/null
+++ b/progs/demos/Windows/renormal.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="renormal" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

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+# TARGTYPE "Win32 (x86) Console Application" 0x0103

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+CFG=renormal - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "renormal.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

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+!MESSAGE NMAKE /f "renormal.mak" CFG="bounce - Win32 Debug"

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+!MESSAGE Possible choices for configuration are:

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+!MESSAGE "renormal - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "renormal - Win32 Debug" (based on "Win32 (x86) Console Application")

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+# Begin Project

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+!IF  "$(CFG)" == "renormal - Win32 Release"

+

+# PROP BASE Use_MFC 0

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+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

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+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../renormal.exe"

+# Begin Special Build Tool

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+!ELSEIF  "$(CFG)" == "renormal - Win32 Debug"

+

+# PROP BASE Use_MFC 0

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+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../renormal.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ENDIF 

+

+# Begin Target

+

+# Name "renormal - Win32 Release"

+# Name "renormal - Win32 Debug"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=..\renormal.c

+# End Source File

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+# PROP Default_Filter "h;hpp;hxx;hm;inl"

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+# Begin Group "Resource Files"

+

+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

+# End Target

+# End Project

diff --git a/progs/demos/Windows/shadowtex.dsp b/progs/demos/Windows/shadowtex.dsp
new file mode 100644
index 000000000..419ec2413
--- /dev/null
+++ b/progs/demos/Windows/shadowtex.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="shadowtex" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=shadowtex - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "shadowtex.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "shadowtex.mak" CFG="bounce - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "shadowtex - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "shadowtex - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "shadowtex - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 0

+# PROP Output_Dir "Release"

+# PROP Intermediate_Dir "Release"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../shadowtex.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ELSEIF  "$(CFG)" == "shadowtex - Win32 Debug"

+

+# PROP BASE Use_MFC 0

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+# PROP BASE Intermediate_Dir "Debug"

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+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../shadowtex.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ENDIF 

+

+# Begin Target

+

+# Name "shadowtex - Win32 Release"

+# Name "shadowtex - Win32 Debug"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=..\shadowtex.c

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+

+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

+# End Target

+# End Project

diff --git a/progs/demos/Windows/spectex.dsp b/progs/demos/Windows/spectex.dsp
new file mode 100644
index 000000000..d1960b3d1
--- /dev/null
+++ b/progs/demos/Windows/spectex.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="spectex" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=spectex - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "spectex.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "spectex.mak" CFG="bounce - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "spectex - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "spectex - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "spectex - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

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+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

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+# PROP Intermediate_Dir "Release"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../spectex.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ELSEIF  "$(CFG)" == "spectex - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

+# PROP BASE Target_Dir ""

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+# PROP Output_Dir "Debug"

+# PROP Intermediate_Dir "Debug"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../spectex.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ENDIF 

+

+# Begin Target

+

+# Name "spectex - Win32 Release"

+# Name "spectex - Win32 Debug"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=..\spectex.c

+# End Source File

+# End Group

+# Begin Group "Header Files"

+

+# PROP Default_Filter "h;hpp;hxx;hm;inl"

+# End Group

+# Begin Group "Resource Files"

+

+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

+# End Target

+# End Project

diff --git a/progs/demos/Windows/spriteblast.dsp b/progs/demos/Windows/spriteblast.dsp
new file mode 100644
index 000000000..8a02ed50d
--- /dev/null
+++ b/progs/demos/Windows/spriteblast.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="spriteblast" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=spriteblast - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "spriteblast.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "spriteblast.mak" CFG="bounce - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "spriteblast - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "spriteblast - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "spriteblast - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

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+# PROP Output_Dir "Release"

+# PROP Intermediate_Dir "Release"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../spriteblast.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ELSEIF  "$(CFG)" == "spriteblast - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

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+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../spriteblast.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ENDIF 

+

+# Begin Target

+

+# Name "spriteblast - Win32 Release"

+# Name "spriteblast - Win32 Debug"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=..\spriteblast.c

+# End Source File

+# End Group

+# Begin Group "Header Files"

+

+# PROP Default_Filter "h;hpp;hxx;hm;inl"

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+# Begin Group "Resource Files"

+

+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

+# End Target

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diff --git a/progs/demos/Windows/stex3d.dsp b/progs/demos/Windows/stex3d.dsp
new file mode 100644
index 000000000..7c112d62c
--- /dev/null
+++ b/progs/demos/Windows/stex3d.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="stex3d" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=stex3d - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "stex3d.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "stex3d.mak" CFG="bounce - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "stex3d - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "stex3d - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "stex3d - Win32 Release"

+

+# PROP BASE Use_MFC 0

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+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

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+# PROP Output_Dir "Release"

+# PROP Intermediate_Dir "Release"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../stex3d.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ELSEIF  "$(CFG)" == "stex3d - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

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+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../stex3d.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ENDIF 

+

+# Begin Target

+

+# Name "stex3d - Win32 Release"

+# Name "stex3d - Win32 Debug"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=..\stex3d.c

+# End Source File

+# End Group

+# Begin Group "Header Files"

+

+# PROP Default_Filter "h;hpp;hxx;hm;inl"

+# End Group

+# Begin Group "Resource Files"

+

+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

+# End Target

+# End Project

diff --git a/progs/demos/Windows/teapot.dsp b/progs/demos/Windows/teapot.dsp
new file mode 100644
index 000000000..3260e635a
--- /dev/null
+++ b/progs/demos/Windows/teapot.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="teapot" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=teapot - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "teapot.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "teapot.mak" CFG="gloss - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "teapot - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "teapot - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "teapot - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 0

+# PROP Output_Dir "Release"

+# PROP Intermediate_Dir "Release"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../util" /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../teapot.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ELSEIF  "$(CFG)" == "teapot - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

+# PROP BASE Target_Dir ""

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+# PROP Output_Dir "Debug"

+# PROP Intermediate_Dir "Debug"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../util" /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../teapot.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ENDIF 

+

+# Begin Target

+

+# Name "teapot - Win32 Release"

+# Name "teapot - Win32 Debug"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=..\teapot.c

+# End Source File

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+# PROP Default_Filter "h;hpp;hxx;hm;inl"

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+# Begin Group "Resource Files"

+

+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

+# End Target

+# End Project

diff --git a/progs/demos/Windows/terrain.dsp b/progs/demos/Windows/terrain.dsp
new file mode 100644
index 000000000..9fe490db8
--- /dev/null
+++ b/progs/demos/Windows/terrain.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="terrain" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=terrain - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "terrain.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "terrain.mak" CFG="bounce - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "terrain - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "terrain - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "terrain - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 0

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+# PROP Intermediate_Dir "Release"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../terrain.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ELSEIF  "$(CFG)" == "terrain - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "Debug"

+# PROP Intermediate_Dir "Debug"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../terrain.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ENDIF 

+

+# Begin Target

+

+# Name "terrain - Win32 Release"

+# Name "terrain - Win32 Debug"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=..\terrain.c

+# End Source File

+# End Group

+# Begin Group "Header Files"

+

+# PROP Default_Filter "h;hpp;hxx;hm;inl"

+# End Group

+# Begin Group "Resource Files"

+

+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

+# End Target

+# End Project

diff --git a/progs/demos/Windows/tessdemo.dsp b/progs/demos/Windows/tessdemo.dsp
new file mode 100644
index 000000000..61345c79e
--- /dev/null
+++ b/progs/demos/Windows/tessdemo.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="tessdemo" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=tessdemo - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "tessdemo.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "tessdemo.mak" CFG="bounce - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "tessdemo - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "tessdemo - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "tessdemo - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 0

+# PROP Output_Dir "Release"

+# PROP Intermediate_Dir "Release"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../tessdemo.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ELSEIF  "$(CFG)" == "tessdemo - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "Debug"

+# PROP Intermediate_Dir "Debug"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../tessdemo.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ENDIF 

+

+# Begin Target

+

+# Name "tessdemo - Win32 Release"

+# Name "tessdemo - Win32 Debug"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=..\tessdemo.c

+# End Source File

+# End Group

+# Begin Group "Header Files"

+

+# PROP Default_Filter "h;hpp;hxx;hm;inl"

+# End Group

+# Begin Group "Resource Files"

+

+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

+# End Target

+# End Project

diff --git a/progs/demos/Windows/texcyl.dsp b/progs/demos/Windows/texcyl.dsp
new file mode 100644
index 000000000..b227e02c2
--- /dev/null
+++ b/progs/demos/Windows/texcyl.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="texcyl" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=texcyl - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "texcyl.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "texcyl.mak" CFG="gloss - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "texcyl - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "texcyl - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "texcyl - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 0

+# PROP Output_Dir "Release"

+# PROP Intermediate_Dir "Release"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../util" /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../texcyl.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ELSEIF  "$(CFG)" == "texcyl - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "Debug"

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+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../util" /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../texcyl.exe" /pdbtype:sept

+# Begin Special Build Tool

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+# Begin Target

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+# Name "texcyl - Win32 Release"

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+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

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diff --git a/progs/demos/Windows/texdown.dsp b/progs/demos/Windows/texdown.dsp
new file mode 100644
index 000000000..acea7666a
--- /dev/null
+++ b/progs/demos/Windows/texdown.dsp
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+# Microsoft Developer Studio Project File - Name="texdown" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

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+

+CFG=texdown - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

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+!MESSAGE NMAKE /f "texdown.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

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+!MESSAGE NMAKE /f "texdown.mak" CFG="bounce - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

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+!MESSAGE "texdown - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "texdown - Win32 Debug" (based on "Win32 (x86) Console Application")

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+

+# Begin Project

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+!IF  "$(CFG)" == "texdown - Win32 Release"

+

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+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

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+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../texdown.exe"

+# Begin Special Build Tool

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+!ELSEIF  "$(CFG)" == "texdown - Win32 Debug"

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+# PROP BASE Use_MFC 0

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../texdown.exe" /pdbtype:sept

+# Begin Special Build Tool

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+# Name "texdown - Win32 Release"

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diff --git a/progs/demos/Windows/texenv.dsp b/progs/demos/Windows/texenv.dsp
new file mode 100644
index 000000000..3eb7eecdb
--- /dev/null
+++ b/progs/demos/Windows/texenv.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="texenv" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

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+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=texenv - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

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+!MESSAGE NMAKE /f "texenv.mak".

+!MESSAGE 

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+!MESSAGE by defining the macro CFG on the command line. For example:

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+!MESSAGE NMAKE /f "texenv.mak" CFG="bounce - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

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+!MESSAGE "texenv - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "texenv - Win32 Debug" (based on "Win32 (x86) Console Application")

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+# Begin Project

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+!IF  "$(CFG)" == "texenv - Win32 Release"

+

+# PROP BASE Use_MFC 0

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+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

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+# ADD BASE RSC /l 0x409 /d "NDEBUG"

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+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../texenv.exe"

+# Begin Special Build Tool

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+!ELSEIF  "$(CFG)" == "texenv - Win32 Debug"

+

+# PROP BASE Use_MFC 0

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+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../texenv.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

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+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

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+!ENDIF 

+

+# Begin Target

+

+# Name "texenv - Win32 Release"

+# Name "texenv - Win32 Debug"

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+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

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+SOURCE=..\texenv.c

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+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

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new file mode 100644
index 000000000..5db5f2ee7
--- /dev/null
+++ b/progs/demos/Windows/texobj.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="texobj" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=texobj - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "texobj.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

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+!MESSAGE NMAKE /f "texobj.mak" CFG="bounce - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

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+!MESSAGE "texobj - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "texobj - Win32 Debug" (based on "Win32 (x86) Console Application")

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+# Begin Project

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+

+!IF  "$(CFG)" == "texobj - Win32 Release"

+

+# PROP BASE Use_MFC 0

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+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

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+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../texobj.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

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+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ELSEIF  "$(CFG)" == "texobj - Win32 Debug"

+

+# PROP BASE Use_MFC 0

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+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

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+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../texobj.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

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+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

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+# Begin Target

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+# Name "texobj - Win32 Release"

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+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

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diff --git a/progs/demos/Windows/trispd.dsp b/progs/demos/Windows/trispd.dsp
new file mode 100644
index 000000000..7e27cf3d0
--- /dev/null
+++ b/progs/demos/Windows/trispd.dsp
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+# ** DO NOT EDIT **

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+CFG=trispd - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

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+!MESSAGE You can specify a configuration when running NMAKE

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+!MESSAGE Possible choices for configuration are:

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+!MESSAGE "trispd - Win32 Release" (based on "Win32 (x86) Console Application")

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+# Begin Project

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+

+!IF  "$(CFG)" == "trispd - Win32 Release"

+

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+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../trispd.exe"

+# Begin Special Build Tool

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+!ELSEIF  "$(CFG)" == "trispd - Win32 Debug"

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+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../trispd.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ENDIF 

+

+# Begin Target

+

+# Name "trispd - Win32 Release"

+# Name "trispd - Win32 Debug"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=..\trispd.c

+# End Source File

+# End Group

+# Begin Group "Header Files"

+

+# PROP Default_Filter "h;hpp;hxx;hm;inl"

+# End Group

+# Begin Group "Resource Files"

+

+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

+# End Target

+# End Project

diff --git a/progs/demos/Windows/tunnel.dsp b/progs/demos/Windows/tunnel.dsp
new file mode 100644
index 000000000..965f109c3
--- /dev/null
+++ b/progs/demos/Windows/tunnel.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="tunnel" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=tunnel - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "tunnel.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "tunnel.mak" CFG="gloss - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "tunnel - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "tunnel - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "tunnel - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 0

+# PROP Output_Dir "Release"

+# PROP Intermediate_Dir "Release"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../util" /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../tunnel.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ELSEIF  "$(CFG)" == "tunnel - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "Debug"

+# PROP Intermediate_Dir "Debug"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../util" /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../tunnel.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ENDIF 

+

+# Begin Target

+

+# Name "tunnel - Win32 Release"

+# Name "tunnel - Win32 Debug"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=..\tunnel.c

+# End Source File

+# End Group

+# Begin Group "Header Files"

+

+# PROP Default_Filter "h;hpp;hxx;hm;inl"

+# End Group

+# Begin Group "Resource Files"

+

+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

+# End Target

+# End Project

diff --git a/progs/demos/Windows/tunnel2.dsp b/progs/demos/Windows/tunnel2.dsp
new file mode 100644
index 000000000..3ae2800a0
--- /dev/null
+++ b/progs/demos/Windows/tunnel2.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="tunnel2" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=tunnel2 - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "tunnel2.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "tunnel2.mak" CFG="gloss - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "tunnel2 - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "tunnel2 - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "tunnel2 - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 0

+# PROP Output_Dir "Release"

+# PROP Intermediate_Dir "Release"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../util" /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../tunnel2.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ELSEIF  "$(CFG)" == "tunnel2 - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "Debug"

+# PROP Intermediate_Dir "Debug"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../util" /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../tunnel2.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ENDIF 

+

+# Begin Target

+

+# Name "tunnel2 - Win32 Release"

+# Name "tunnel2 - Win32 Debug"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=..\tunnel2.c

+# End Source File

+# End Group

+# Begin Group "Header Files"

+

+# PROP Default_Filter "h;hpp;hxx;hm;inl"

+# End Group

+# Begin Group "Resource Files"

+

+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

+# End Target

+# End Project

diff --git a/progs/demos/Windows/winpos.dsp b/progs/demos/Windows/winpos.dsp
new file mode 100644
index 000000000..b7b569e64
--- /dev/null
+++ b/progs/demos/Windows/winpos.dsp
@@ -0,0 +1,112 @@
+# Microsoft Developer Studio Project File - Name="winpos" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Console Application" 0x0103

+

+CFG=winpos - Win32 Debug

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "winpos.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "winpos.mak" CFG="gloss - Win32 Debug"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "winpos - Win32 Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "winpos - Win32 Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "winpos - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 0

+# PROP Output_Dir "Release"

+# PROP Intermediate_Dir "Release"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD CPP /nologo /W3 /GX /O2 /I "../../util" /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x409 /d "NDEBUG"

+# ADD RSC /l 0x409 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /machine:I386 /out:"../winpos.exe"

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ELSEIF  "$(CFG)" == "winpos - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "Debug"

+# PROP Intermediate_Dir "Debug"

+# PROP Ignore_Export_Lib 0

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I "../../util" /I "../../../include" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x409 /d "_DEBUG"

+# ADD RSC /l 0x409 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LINK32=link.exe

+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ../../../lib/GLUT32.LIB ../../../lib/GLU32.LIB ../../../lib/OPENGL32.LIB /nologo /subsystem:console /debug /machine:I386 /out:"../winpos.exe" /pdbtype:sept

+# Begin Special Build Tool

+SOURCE="$(InputPath)"

+PostBuild_Desc=Copy DLLs

+PostBuild_Cmds=copy ..\..\..\lib\*.dll ..

+# End Special Build Tool

+

+!ENDIF 

+

+# Begin Target

+

+# Name "winpos - Win32 Release"

+# Name "winpos - Win32 Debug"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=..\winpos.c

+# End Source File

+# End Group

+# Begin Group "Header Files"

+

+# PROP Default_Filter "h;hpp;hxx;hm;inl"

+# End Group

+# Begin Group "Resource Files"

+

+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"

+# End Group

+# End Target

+# End Project

diff --git a/progs/demos/arbfplight.c b/progs/demos/arbfplight.c
new file mode 100644
index 000000000..6ad95d4d7
--- /dev/null
+++ b/progs/demos/arbfplight.c
@@ -0,0 +1,395 @@
+/*
+ * Use GL_ARB_fragment_program and GL_ARB_vertex_program to implement
+ * simple per-pixel lighting.
+ *
+ * Brian Paul
+ * 17 April 2003
+ */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+
+
+static GLfloat Diffuse[4] = { 0.5, 0.5, 1.0, 1.0 };
+static GLfloat Specular[4] = { 0.8, 0.8, 0.8, 1.0 };
+static GLfloat LightPos[4] = { 0.0, 10.0, 20.0, 1.0 };
+static GLfloat Delta = 1.0;
+
+static GLuint FragProg;
+static GLuint VertProg;
+static GLboolean Anim = GL_TRUE;
+static GLboolean Wire = GL_FALSE;
+static GLboolean PixelLight = GL_TRUE;
+
+static GLint T0 = 0;
+static GLint Frames = 0;
+
+static GLfloat Xrot = 0, Yrot = 0;
+
+static PFNGLPROGRAMLOCALPARAMETER4FVARBPROC glProgramLocalParameter4fvARB_func;
+static PFNGLPROGRAMLOCALPARAMETER4DARBPROC glProgramLocalParameter4dARB_func;
+static PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC glGetProgramLocalParameterdvARB_func;
+static PFNGLGENPROGRAMSARBPROC glGenProgramsARB_func;
+static PFNGLPROGRAMSTRINGARBPROC glProgramStringARB_func;
+static PFNGLBINDPROGRAMARBPROC glBindProgramARB_func;
+static PFNGLISPROGRAMARBPROC glIsProgramARB_func;
+static PFNGLDELETEPROGRAMSARBPROC glDeleteProgramsARB_func;
+
+/* These must match the indexes used in the fragment program */
+#define LIGHTPOS 3
+
+/* Set to one to test ARB_fog_linear program option */
+#define DO_FRAGMENT_FOG 0
+
+
+static void Redisplay( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   if (PixelLight) {
+      glProgramLocalParameter4fvARB_func(GL_FRAGMENT_PROGRAM_ARB,
+                                         LIGHTPOS, LightPos);
+      glEnable(GL_FRAGMENT_PROGRAM_ARB);
+      glEnable(GL_VERTEX_PROGRAM_ARB);
+      glDisable(GL_LIGHTING);
+   }
+   else {
+      glLightfv(GL_LIGHT0, GL_POSITION, LightPos);
+      glDisable(GL_FRAGMENT_PROGRAM_ARB);
+      glDisable(GL_VERTEX_PROGRAM_ARB);
+      glEnable(GL_LIGHTING);
+   }
+
+   glPushMatrix();
+   glRotatef(Xrot, 1, 0, 0);
+   glRotatef(Yrot, 0, 1, 0);
+   glutSolidSphere(2.0, 10, 5);
+   glPopMatrix();
+
+   glutSwapBuffers();
+
+   Frames++;
+
+   if (Anim) {
+      GLint t = glutGet(GLUT_ELAPSED_TIME);
+      if (t - T0 >= 5000) {
+	 GLfloat seconds = (t - T0) / 1000.0;
+	 GLfloat fps = Frames / seconds;
+	 printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps);
+	 T0 = t;
+	 Frames = 0;
+      }
+   }
+}
+
+
+static void Idle(void)
+{
+   LightPos[0] += Delta;
+   if (LightPos[0] > 25.0)
+      Delta = -1.0;
+   else if (LightPos[0] <- 25.0)
+      Delta = 1.0;
+   glutPostRedisplay();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -15.0 );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+     case ' ':
+     case 'a':
+        Anim = !Anim;
+        if (Anim)
+           glutIdleFunc(Idle);
+        else
+           glutIdleFunc(NULL);
+        break;
+      case 'x':
+         LightPos[0] -= 1.0;
+         break;
+      case 'X':
+         LightPos[0] += 1.0;
+         break;
+      case 'w':
+         Wire = !Wire;
+         if (Wire)
+            glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+         else
+            glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+         break;
+      case 'p':
+         PixelLight = !PixelLight;
+         if (PixelLight) {
+            printf("Per-pixel lighting\n");
+         }
+         else {
+            printf("Conventional lighting\n");
+         }
+         break;
+      case 27:
+         glDeleteProgramsARB_func(1, &VertProg);
+         glDeleteProgramsARB_func(1, &FragProg);
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+static void SpecialKey( int key, int x, int y )
+{
+   const GLfloat step = 3.0;
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         Xrot -= step;
+         break;
+      case GLUT_KEY_DOWN:
+         Xrot += step;
+         break;
+      case GLUT_KEY_LEFT:
+         Yrot -= step;
+         break;
+      case GLUT_KEY_RIGHT:
+         Yrot += step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+/* A helper for finding errors in program strings */
+static int FindLine( const char *program, int position )
+{
+   int i, line = 1;
+   for (i = 0; i < position; i++) {
+      if (program[i] == '\n')
+         line++;
+   }
+   return line;
+}
+
+
+static void Init( void )
+{
+   GLint errorPos;
+
+   /* Yes, this could be expressed more efficiently */
+   static const char *fragProgramText =
+      "!!ARBfp1.0\n"
+#if DO_FRAGMENT_FOG
+      "OPTION ARB_fog_linear; \n"
+#endif
+      "PARAM Diffuse = state.material.diffuse; \n"
+      "PARAM Specular = state.material.specular; \n"
+      "PARAM LightPos = program.local[3]; \n"
+      "TEMP lightDir, normal, len; \n"
+      "TEMP dotProd, specAtten; \n"
+      "TEMP diffuseColor, specularColor; \n"
+
+      "# Compute normalized light direction \n"
+      "DP3 len.x, LightPos, LightPos; \n"
+      "RSQ len.y, len.x; \n"
+      "MUL lightDir, LightPos, len.y; \n"
+
+      "# Compute normalized normal \n"
+      "DP3 len.x, fragment.texcoord[0], fragment.texcoord[0]; \n"
+      "RSQ len.y, len.x; \n"
+      "MUL normal, fragment.texcoord[0], len.y; \n"
+
+      "# Compute dot product of light direction and normal vector\n"
+      "DP3_SAT dotProd, lightDir, normal;             # limited to [0,1]\n"
+
+      "MUL diffuseColor, Diffuse, dotProd;            # diffuse attenuation\n"
+
+      "POW specAtten.x, dotProd.x, {20.0}.x;          # specular exponent\n"
+
+      "MUL specularColor, Specular, specAtten.x;      # specular attenuation\n"
+
+#if DO_FRAGMENT_FOG
+      "# need to clamp color to [0,1] before fogging \n"
+      "ADD_SAT result.color, diffuseColor, specularColor; # add colors\n"
+#else
+      "# clamping will be done after program's finished \n"
+      "ADD result.color, diffuseColor, specularColor; # add colors\n"
+#endif
+      "END \n"
+      ;
+
+   static const char *vertProgramText =
+      "!!ARBvp1.0\n"
+      "ATTRIB pos = vertex.position; \n"
+      "ATTRIB norm = vertex.normal; \n"
+      "PARAM modelview[4] = { state.matrix.modelview }; \n"
+      "PARAM modelviewProj[4] = { state.matrix.mvp }; \n"
+      "PARAM invModelview[4] = { state.matrix.modelview.invtrans }; \n"
+
+      "# typical modelview/projection transform \n"
+      "DP4 result.position.x, pos, modelviewProj[0]; \n"
+      "DP4 result.position.y, pos, modelviewProj[1]; \n"
+      "DP4 result.position.z, pos, modelviewProj[2]; \n"
+      "DP4 result.position.w, pos, modelviewProj[3]; \n"
+
+      "# transform normal by inv transpose of modelview, put in tex0 \n"
+      "DP3 result.texcoord[0].x, norm, invModelview[0]; \n"
+      "DP3 result.texcoord[0].y, norm, invModelview[1]; \n"
+      "DP3 result.texcoord[0].z, norm, invModelview[2]; \n"
+      "DP3 result.texcoord[0].w, norm, invModelview[3]; \n"
+
+#if DO_FRAGMENT_FOG
+      "# compute fog coordinate = vertex eye-space Z coord (negated)\n"
+      "DP4 result.fogcoord, -pos, modelview[2]; \n"
+#endif
+      "END\n";
+      ;
+
+   if (!glutExtensionSupported("GL_ARB_vertex_program")) {
+      printf("Sorry, this demo requires GL_ARB_vertex_program\n");
+      exit(1);
+   }
+   if (!glutExtensionSupported("GL_ARB_fragment_program")) {
+      printf("Sorry, this demo requires GL_ARB_fragment_program\n");
+      exit(1);
+   }
+         
+   /*
+    * Get extension function pointers.
+    */
+   glProgramLocalParameter4fvARB_func = (PFNGLPROGRAMLOCALPARAMETER4FVARBPROC) glutGetProcAddress("glProgramLocalParameter4fvARB");
+   assert(glProgramLocalParameter4fvARB_func);
+
+   glProgramLocalParameter4dARB_func = (PFNGLPROGRAMLOCALPARAMETER4DARBPROC) glutGetProcAddress("glProgramLocalParameter4dARB");
+   assert(glProgramLocalParameter4dARB_func);
+
+   glGetProgramLocalParameterdvARB_func = (PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC) glutGetProcAddress("glGetProgramLocalParameterdvARB");
+   assert(glGetProgramLocalParameterdvARB_func);
+
+   glGenProgramsARB_func = (PFNGLGENPROGRAMSARBPROC) glutGetProcAddress("glGenProgramsARB");
+   assert(glGenProgramsARB_func);
+
+   glProgramStringARB_func = (PFNGLPROGRAMSTRINGARBPROC) glutGetProcAddress("glProgramStringARB");
+   assert(glProgramStringARB_func);
+
+   glBindProgramARB_func = (PFNGLBINDPROGRAMARBPROC) glutGetProcAddress("glBindProgramARB");
+   assert(glBindProgramARB_func);
+
+   glIsProgramARB_func = (PFNGLISPROGRAMARBPROC) glutGetProcAddress("glIsProgramARB");
+   assert(glIsProgramARB_func);
+
+   glDeleteProgramsARB_func = (PFNGLDELETEPROGRAMSARBPROC) glutGetProcAddress("glDeleteProgramsARB");
+   assert(glDeleteProgramsARB_func);
+
+   /*
+    * Fragment program
+    */
+   glGenProgramsARB_func(1, &FragProg);
+   assert(FragProg > 0);
+   glBindProgramARB_func(GL_FRAGMENT_PROGRAM_ARB, FragProg);
+   glProgramStringARB_func(GL_FRAGMENT_PROGRAM_ARB,
+                           GL_PROGRAM_FORMAT_ASCII_ARB,
+                           strlen(fragProgramText),
+                           (const GLubyte *) fragProgramText);
+   glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorPos);
+   if (glGetError() != GL_NO_ERROR || errorPos != -1) {
+      int l = FindLine(fragProgramText, errorPos);
+      printf("Fragment Program Error (pos=%d line=%d): %s\n", errorPos, l,
+             (char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB));
+      exit(0);
+   }
+   assert(glIsProgramARB_func(FragProg));
+
+   /*
+    * Do some sanity tests
+    */
+   {
+      GLdouble v[4];
+      glProgramLocalParameter4dARB_func(GL_FRAGMENT_PROGRAM_ARB, 8,
+                                   10.0, 20.0, 30.0, 40.0);
+      glGetProgramLocalParameterdvARB_func(GL_FRAGMENT_PROGRAM_ARB, 8, v);
+      assert(v[0] == 10.0);
+      assert(v[1] == 20.0);
+      assert(v[2] == 30.0);
+      assert(v[3] == 40.0);
+   }
+
+   /*
+    * Vertex program
+    */
+   glGenProgramsARB_func(1, &VertProg);
+   assert(VertProg > 0);
+   glBindProgramARB_func(GL_VERTEX_PROGRAM_ARB, VertProg);
+   glProgramStringARB_func(GL_VERTEX_PROGRAM_ARB,
+                           GL_PROGRAM_FORMAT_ASCII_ARB,
+                           strlen(vertProgramText),
+                           (const GLubyte *) vertProgramText);
+   glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorPos);
+   if (glGetError() != GL_NO_ERROR || errorPos != -1) {
+      int l = FindLine(fragProgramText, errorPos);
+      printf("Vertex Program Error (pos=%d line=%d): %s\n", errorPos, l,
+             (char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB));
+      exit(0);
+   }
+   assert(glIsProgramARB_func(VertProg));
+
+   /*
+    * Misc init
+    */
+   glClearColor(0.3, 0.3, 0.3, 0.0);
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_LIGHT0);
+   glEnable(GL_LIGHTING);
+   glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, Diffuse);
+   glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, Specular);
+   glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 20.0);
+
+#if DO_FRAGMENT_FOG
+   {
+      /* Green-ish fog color */
+      static const GLfloat fogColor[4] = {0.5, 1.0, 0.5, 0};
+      glFogfv(GL_FOG_COLOR, fogColor);
+      glFogf(GL_FOG_START, 5.0);
+      glFogf(GL_FOG_END, 25.0);
+   }
+#endif
+
+   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+   printf("Press p to toggle between per-pixel and per-vertex lighting\n");
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 200, 200 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+   glutCreateWindow(argv[0]);
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Redisplay );
+   if (Anim)
+      glutIdleFunc(Idle);
+   Init();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/arbocclude.c b/progs/demos/arbocclude.c
new file mode 100644
index 000000000..ddbb1f1b7
--- /dev/null
+++ b/progs/demos/arbocclude.c
@@ -0,0 +1,283 @@
+/*
+ * GL_ARB_occlusion_query demo
+ *
+ * Brian Paul
+ * 12 June 2003
+ *
+ * Copyright (C) 2003  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#define GL_GLEXT_PROTOTYPES
+#include <GL/glut.h>
+
+#define TEST_DISPLAY_LISTS 0
+
+static GLboolean Anim = GL_TRUE;
+static GLfloat Xpos = 0;
+static GLuint OccQuery;
+
+
+
+static void
+PrintString(const char *s)
+{
+   while (*s) {
+      glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
+      s++;
+   }
+}
+
+
+
+static void Idle(void)
+{
+   static int lastTime = 0;
+   static int sign = +1;
+   int time = glutGet(GLUT_ELAPSED_TIME);
+   float step;
+
+   if (lastTime == 0)
+      lastTime = time;
+   else if (time - lastTime < 20)  /* 50Hz update */
+      return;
+
+   step = (time - lastTime) / 1000.0 * sign;
+   lastTime = time;
+
+   Xpos += step;
+
+   if (Xpos > 2.5) {
+      Xpos = 2.5;
+      sign = -1;
+   }
+   else if (Xpos < -2.5) {
+      Xpos = -2.5;
+      sign = +1;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Display( void )
+{
+   GLuint passed;
+   GLint ready;
+   char s[100];
+
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -15.0 );
+
+   /* draw the occluding polygons */
+   glColor3f(0, 0.6, 0.8);
+   glBegin(GL_QUADS);
+   glVertex2f(-1.6, -1.5);
+   glVertex2f(-0.4, -1.5);
+   glVertex2f(-0.4,  1.5);
+   glVertex2f(-1.6,  1.5);
+
+   glVertex2f( 0.4, -1.5);
+   glVertex2f( 1.6, -1.5);
+   glVertex2f( 1.6,  1.5);
+   glVertex2f( 0.4,  1.5);
+   glEnd();
+
+   /* draw the test polygon with occlusion testing */
+   glPushMatrix();
+   glTranslatef(Xpos, 0, -0.5);
+   glScalef(0.3, 0.3, 1.0);
+   glRotatef(-90.0 * Xpos, 0, 0, 1);
+
+#if defined(GL_ARB_occlusion_query)
+#if TEST_DISPLAY_LISTS
+   glNewList(10, GL_COMPILE);
+   glBeginQueryARB(GL_SAMPLES_PASSED_ARB, OccQuery);
+   glEndList();
+   glCallList(10);
+#else
+   glBeginQueryARB(GL_SAMPLES_PASSED_ARB, OccQuery);
+#endif
+
+   glColorMask(0, 0, 0, 0);
+   glDepthMask(GL_FALSE);
+
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, -1, 0);
+   glVertex3f( 1, -1, 0);
+   glVertex3f( 1,  1, 0);
+   glVertex3f(-1,  1, 0);
+   glEnd();
+
+#if TEST_DISPLAY_LISTS
+   glNewList(11, GL_COMPILE);
+   glEndQueryARB(GL_SAMPLES_PASSED_ARB);
+   glEndList();
+   glCallList(11);
+#else
+   glEndQueryARB(GL_SAMPLES_PASSED_ARB);
+#endif
+
+   do {
+      /* do useful work here, if any */
+      glGetQueryObjectivARB(OccQuery, GL_QUERY_RESULT_AVAILABLE_ARB, &ready);
+   } while (!ready);
+   glGetQueryObjectuivARB(OccQuery, GL_QUERY_RESULT_ARB, &passed);
+
+   /* turn off occlusion testing */
+   glColorMask(1, 1, 1, 1);
+   glDepthMask(GL_TRUE);
+#endif /* GL_ARB_occlusion_query */
+
+   /* draw the orange rect, so we can see what's going on */
+   glColor3f(0.8, 0.5, 0);
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, -1, 0);
+   glVertex3f( 1, -1, 0);
+   glVertex3f( 1,  1, 0);
+   glVertex3f(-1,  1, 0);
+   glEnd();
+
+   glPopMatrix();
+
+
+   /* Print result message */
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+
+   glColor3f(1, 1, 1);
+#if defined(GL_ARB_occlusion_query)
+   sprintf(s, " %4d Fragments Visible", passed);
+   glRasterPos3f(-0.50, -0.7, 0);
+   PrintString(s);
+   if (!passed) {
+      glRasterPos3f(-0.25, -0.8, 0);
+      PrintString("Fully Occluded");
+   }
+#else
+   glRasterPos3f(-0.25, -0.8, 0);
+   PrintString("GL_ARB_occlusion_query not available at compile time");
+#endif /* GL_ARB_occlusion_query */
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         exit(0);
+         break;
+      case ' ':
+         Anim = !Anim;
+         if (Anim)
+            glutIdleFunc(Idle);
+         else
+            glutIdleFunc(NULL);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   const GLfloat step = 0.1;
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_LEFT:
+         Xpos -= step;
+         break;
+      case GLUT_KEY_RIGHT:
+         Xpos += step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+   const char *ext = (const char *) glGetString(GL_EXTENSIONS);
+   GLint bits;
+
+   if (!strstr(ext, "GL_ARB_occlusion_query")) {
+      printf("Sorry, this demo requires the GL_ARB_occlusion_query extension\n");
+      exit(-1);
+   }
+
+#if defined(GL_ARB_occlusion_query)
+   glGetQueryivARB(GL_SAMPLES_PASSED_ARB, GL_QUERY_COUNTER_BITS_ARB, &bits);
+   if (!bits) {
+      printf("Hmmm, GL_QUERY_COUNTER_BITS_ARB is zero!\n");
+      exit(-1);
+   }
+#endif /* GL_ARB_occlusion_query */
+
+   glGetIntegerv(GL_DEPTH_BITS, &bits);
+   printf("Depthbits: %d\n", bits);
+
+#if defined(GL_ARB_occlusion_query)
+   glGenQueriesARB(1, &OccQuery);
+   assert(OccQuery > 0);
+#endif /* GL_ARB_occlusion_query */
+
+   glEnable(GL_DEPTH_TEST);
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 400, 400 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+   glutCreateWindow(argv[0]);
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutIdleFunc( Idle );
+   glutDisplayFunc( Display );
+   Init();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/bounce.c b/progs/demos/bounce.c
new file mode 100644
index 000000000..2f3fa9fd9
--- /dev/null
+++ b/progs/demos/bounce.c
@@ -0,0 +1,228 @@
+
+/*
+ * Bouncing ball demo.
+ *
+ * This program is in the public domain
+ *
+ * Brian Paul
+ *
+ * Conversion to GLUT by Mark J. Kilgard
+ */
+
+
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+#include <GL/glut.h>
+#include <sys/time.h>
+#include <time.h>
+
+#define COS(X)   cos( (X) * 3.14159/180.0 )
+#define SIN(X)   sin( (X) * 3.14159/180.0 )
+
+#define RED 1
+#define WHITE 2
+#define CYAN 3
+
+GLboolean IndexMode = GL_FALSE;
+GLuint Ball;
+GLenum Mode;
+GLfloat Zrot = 0.0, Zstep = 180.0;
+GLfloat Xpos = 0.0, Ypos = 1.0;
+GLfloat Xvel = 2.0, Yvel = 0.0;
+GLfloat Xmin = -4.0, Xmax = 4.0;
+GLfloat Ymin = -3.8, Ymax = 4.0;
+GLfloat G = -9.8;
+
+static GLuint 
+make_ball(void)
+{
+  GLuint list;
+  GLfloat a, b;
+  GLfloat da = 18.0, db = 18.0;
+  GLfloat radius = 1.0;
+  GLuint color;
+  GLfloat x, y, z;
+
+  list = glGenLists(1);
+
+  glNewList(list, GL_COMPILE);
+
+  color = 0;
+  for (a = -90.0; a + da <= 90.0; a += da) {
+
+    glBegin(GL_QUAD_STRIP);
+    for (b = 0.0; b <= 360.0; b += db) {
+
+      if (color) {
+	glIndexi(RED);
+        glColor3f(1, 0, 0);
+      } else {
+	glIndexi(WHITE);
+        glColor3f(1, 1, 1);
+      }
+
+      x = radius * COS(b) * COS(a);
+      y = radius * SIN(b) * COS(a);
+      z = radius * SIN(a);
+      glVertex3f(x, y, z);
+
+      x = radius * COS(b) * COS(a + da);
+      y = radius * SIN(b) * COS(a + da);
+      z = radius * SIN(a + da);
+      glVertex3f(x, y, z);
+
+      color = 1 - color;
+    }
+    glEnd();
+
+  }
+
+  glEndList();
+
+  return list;
+}
+
+static void 
+reshape(int width, int height)
+{
+  float aspect = (float) width / (float) height;
+  glViewport(0, 0, (GLint) width, (GLint) height);
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  glOrtho(-6.0 * aspect, 6.0 * aspect, -6.0, 6.0, -6.0, 6.0);
+  glMatrixMode(GL_MODELVIEW);
+}
+
+/* ARGSUSED1 */
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+  }
+}
+
+static void 
+draw(void)
+{
+  GLint i;
+
+  glClear(GL_COLOR_BUFFER_BIT);
+
+  glIndexi(CYAN);
+  glColor3f(0, 1, 1);
+  glBegin(GL_LINES);
+  for (i = -5; i <= 5; i++) {
+    glVertex2i(i, -5);
+    glVertex2i(i, 5);
+  }
+  for (i = -5; i <= 5; i++) {
+    glVertex2i(-5, i);
+    glVertex2i(5, i);
+  }
+  for (i = -5; i <= 5; i++) {
+    glVertex2i(i, -5);
+    glVertex2f(i * 1.15, -5.9);
+  }
+  glVertex2f(-5.3, -5.35);
+  glVertex2f(5.3, -5.35);
+  glVertex2f(-5.75, -5.9);
+  glVertex2f(5.75, -5.9);
+  glEnd();
+
+  glPushMatrix();
+  glTranslatef(Xpos, Ypos, 0.0);
+  glScalef(2.0, 2.0, 2.0);
+  glRotatef(8.0, 0.0, 0.0, 1.0);
+  glRotatef(90.0, 1.0, 0.0, 0.0);
+  glRotatef(Zrot, 0.0, 0.0, 1.0);
+
+  glCallList(Ball);
+
+  glPopMatrix();
+
+  glFlush();
+  glutSwapBuffers();
+}
+
+static void 
+idle(void)
+{
+  static float vel0 = -100.0;
+  static double t0 = -1.;
+  double t, dt;
+  t = glutGet(GLUT_ELAPSED_TIME) / 1000.;
+  if (t0 < 0.)
+     t0 = t;
+  dt = t - t0;
+  t0 = t;
+
+  Zrot += Zstep*dt;
+
+  Xpos += Xvel*dt;
+  if (Xpos >= Xmax) {
+    Xpos = Xmax;
+    Xvel = -Xvel;
+    Zstep = -Zstep;
+  }
+  if (Xpos <= Xmin) {
+    Xpos = Xmin;
+    Xvel = -Xvel;
+    Zstep = -Zstep;
+  }
+  Ypos += Yvel*dt;
+  Yvel += G*dt;
+  if (Ypos < Ymin) {
+    Ypos = Ymin;
+    if (vel0 == -100.0)
+      vel0 = fabs(Yvel);
+    Yvel = vel0;
+  }
+  glutPostRedisplay();
+}
+
+static void 
+visible(int vis)
+{
+  if (vis == GLUT_VISIBLE)
+    glutIdleFunc(idle);
+  else
+    glutIdleFunc(NULL);
+}
+
+int main(int argc, char *argv[])
+{
+  glutInit(&argc, argv);
+  glutInitWindowPosition(0, 0);
+  glutInitWindowSize(600, 450);
+
+
+  IndexMode = argc > 1 && strcmp(argv[1], "-ci") == 0;
+  if (IndexMode)
+     glutInitDisplayMode(GLUT_INDEX | GLUT_DOUBLE);
+  else
+     glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
+
+  glutCreateWindow("Bounce");
+  Ball = make_ball();
+  glCullFace(GL_BACK);
+  glEnable(GL_CULL_FACE);
+  glDisable(GL_DITHER);
+  glShadeModel(GL_FLAT);
+
+  glutDisplayFunc(draw);
+  glutReshapeFunc(reshape);
+  glutVisibilityFunc(visible);
+  glutKeyboardFunc(key);
+
+  if (IndexMode) {
+    glutSetColor(RED, 1.0, 0.0, 0.0);
+    glutSetColor(WHITE, 1.0, 1.0, 1.0);
+    glutSetColor(CYAN, 0.0, 1.0, 1.0);
+  }
+
+  glutMainLoop();
+  return 0;             /* ANSI C requires main to return int. */
+}
diff --git a/progs/demos/clearspd.c b/progs/demos/clearspd.c
new file mode 100644
index 000000000..42953f667
--- /dev/null
+++ b/progs/demos/clearspd.c
@@ -0,0 +1,218 @@
+
+/*
+ * Simple GLUT program to measure glClear() and glutSwapBuffers() speed.
+ * Brian Paul  February 15, 1997  This file in public domain.
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <GL/glut.h>
+
+
+static float MinPeriod = 2.0;   /* 2 seconds */
+static int ColorMode = GLUT_RGB;
+static int Width = 400.0;
+static int Height = 400.0;
+static int Loops = 100;
+static float ClearColor = 0.0;
+static GLbitfield BufferMask = GL_COLOR_BUFFER_BIT;
+static GLboolean SwapFlag = GL_FALSE;
+
+
+
+static void Idle( void )
+{
+   glutPostRedisplay();
+}
+
+
+static void Display( void )
+{
+   double t0, t1;
+   double clearRate;
+   double pixelRate;
+   int i;
+
+   glClearColor( ClearColor, ClearColor, ClearColor, 0.0 );
+   ClearColor += 0.1;
+   if (ClearColor>1.0)
+      ClearColor = 0.0;
+
+   if (SwapFlag) {
+      t0 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
+      for (i=0;i<Loops;i++) {
+         glClear( BufferMask );
+         glutSwapBuffers();
+      }
+      glFinish();
+      t1 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
+   }
+   else {
+      t0 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
+      for (i=0;i<Loops;i++) {
+         glClear( BufferMask );
+      }
+      glFinish();
+      t1 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
+      glutSwapBuffers();
+   }
+
+   /* NOTE: If clearspd doesn't map it's window immediately on
+    * starting, swaps will be istantaneous, so this will send Loops
+    * towards infinity.  When a window is finally mapped, it may be
+    * minutes before the first call to glutSwapBuffers, making it look
+    * like there's a driver bug.
+    */
+   if (t1-t0 < MinPeriod) {
+      /* Next time do more clears to get longer elapsed time */
+      Loops *= 2;
+      return;
+   }
+
+   clearRate = Loops / (t1-t0);
+   pixelRate = clearRate * Width * Height;
+   if (SwapFlag) {
+      printf("Rate: %d clears+swaps in %gs = %g clears+swaps/s   %g pixels/s\n",
+             Loops, t1-t0, clearRate, pixelRate );
+   }
+   else {
+      printf("Rate: %d clears in %gs = %g clears/s   %g pixels/s\n",
+             Loops, t1-t0, clearRate, pixelRate);
+   }
+}
+
+
+static void Reshape( int width, int height )
+{
+   Width = width;
+   Height = height;
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho(0.0, width, 0.0, height, -1.0, 1.0);
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( int argc, char *argv[] )
+{
+   int i;
+   for (i=1; i<argc; i++) {
+      if (strcmp(argv[i],"+rgb")==0)
+         ColorMode = GLUT_RGB;
+      else if (strcmp(argv[i],"+ci")==0)
+         ColorMode = GLUT_INDEX;
+      else if (strcmp(argv[i],"-color")==0)
+         BufferMask = 0;
+      else if (strcmp(argv[i],"+depth")==0)
+         BufferMask |= GL_DEPTH_BUFFER_BIT;
+      else if (strcmp(argv[i],"+alpha")==0)
+         ColorMode = GLUT_RGB | GLUT_ALPHA;
+      else if (strcmp(argv[i],"+stencil")==0)
+         BufferMask |= GL_STENCIL_BUFFER_BIT;
+      else if (strcmp(argv[i],"+accum")==0)
+         BufferMask |= GL_ACCUM_BUFFER_BIT;
+      else if (strcmp(argv[i],"-width")==0) {
+         Width = atoi(argv[i+1]);
+         i++;
+      }
+      else if (strcmp(argv[i],"-height")==0) {
+         Height = atoi(argv[i+1]);
+         i++;
+      }
+      else if (strcmp(argv[i],"+swap")==0) {
+         SwapFlag = GL_TRUE;
+      }
+      else if (strcmp(argv[i],"-swap")==0) {
+         SwapFlag = GL_FALSE;
+      }
+      else
+         printf("Unknown option: %s\n", argv[i]);
+   }
+
+   if (ColorMode & GLUT_ALPHA)
+      printf("Mode:  RGB + Alpha\n");
+   else if (ColorMode==GLUT_RGB)
+      printf("Mode:  RGB\n");
+   else
+      printf("Mode:  Color Index\n");
+   printf("SwapBuffers: %s\n", SwapFlag ? "yes" : "no" );
+   printf("Size: %d x %d\n", Width, Height);
+   printf("Buffers: ");
+   if (BufferMask & GL_COLOR_BUFFER_BIT)  printf("color ");
+   if (BufferMask & GL_DEPTH_BUFFER_BIT)  printf("depth ");
+   if (BufferMask & GL_STENCIL_BUFFER_BIT)  printf("stencil ");
+   if (BufferMask & GL_ACCUM_BUFFER_BIT)  printf("accum ");
+   printf("\n");
+}
+
+
+static void Help( const char *program )
+{
+   printf("%s options:\n", program);
+   printf("  +rgb       RGB mode\n");
+   printf("  +ci        color index mode\n");
+   printf("  -color     don't clear color buffer\n");
+   printf("  +alpha     clear alpha buffer\n");
+   printf("  +depth     clear depth buffer\n");
+   printf("  +stencil   clear stencil buffer\n");
+   printf("  +accum     clear accum buffer\n");
+   printf("  +swap      also do SwapBuffers\n");
+   printf("  -swap      don't do SwapBuffers\n");
+}
+
+
+int main( int argc, char *argv[] )
+{
+   GLint mode;
+
+   printf("For options:  %s -help\n", argv[0]);
+
+   Init( argc, argv );
+
+   glutInit( &argc, argv );
+   glutInitWindowSize( (int) Width, (int) Height );
+   glutInitWindowPosition( 0, 0 );
+
+   mode = ColorMode | GLUT_DOUBLE;
+   if (BufferMask & GL_STENCIL_BUFFER_BIT)
+      mode |= GLUT_STENCIL;
+   if (BufferMask & GL_ACCUM_BUFFER_BIT)
+      mode |= GLUT_ACCUM;
+   if (BufferMask & GL_DEPTH_BUFFER_BIT)
+      mode |= GLUT_DEPTH;
+         
+   glutInitDisplayMode(mode);
+
+   glutCreateWindow( argv[0] );
+
+   if (argc==2 && strcmp(argv[1],"-help")==0) {
+      Help(argv[0]);
+      return 0;
+   }
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutDisplayFunc( Display );
+   glutIdleFunc( Idle );
+
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/cubemap.c b/progs/demos/cubemap.c
new file mode 100644
index 000000000..0a59b9898
--- /dev/null
+++ b/progs/demos/cubemap.c
@@ -0,0 +1,475 @@
+/*
+ * GL_ARB_texture_cube_map demo
+ *
+ * Brian Paul
+ * May 2000
+ *
+ *
+ * Copyright (C) 2000  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * This is a pretty minimalistic demo for now.  Eventually, use some
+ * interesting cube map textures and 3D objects.
+ * For now, we use 6 checkerboard "walls" and a sphere (good for
+ * verification purposes).
+ */
+
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "GL/glut.h"
+#include "readtex.h"
+
+
+static GLfloat Xrot = 0, Yrot = 0;
+static GLfloat EyeDist = 10;
+static GLboolean use_vertex_arrays = GL_FALSE;
+static GLboolean anim = GL_TRUE;
+
+#define eps1 0.99
+#define br   20.0  /* box radius */
+
+static const GLfloat tex_coords[] = {
+   /* +X side */
+   1.0, -eps1, -eps1,
+   1.0, -eps1,  eps1,
+   1.0,  eps1,  eps1,
+   1.0,  eps1, -eps1,
+
+   /* -X side */
+   -1.0,  eps1, -eps1,
+   -1.0,  eps1,  eps1,
+   -1.0, -eps1,  eps1,
+   -1.0, -eps1, -eps1,
+
+   /* +Y side */
+   -eps1, 1.0, -eps1,
+   -eps1, 1.0,  eps1,
+    eps1, 1.0,  eps1,
+    eps1, 1.0, -eps1,
+
+   /* -Y side */
+   -eps1, -1.0, -eps1,
+   -eps1, -1.0,  eps1,
+    eps1, -1.0,  eps1,
+    eps1, -1.0, -eps1,
+
+   /* +Z side */
+    eps1, -eps1, 1.0,
+   -eps1, -eps1, 1.0,
+   -eps1,  eps1, 1.0,
+    eps1,  eps1, 1.0,
+
+   /* -Z side */
+    eps1,  eps1, -1.0,
+   -eps1,  eps1, -1.0,
+   -eps1, -eps1, -1.0,
+    eps1, -eps1, -1.0,
+};
+
+static const GLfloat vtx_coords[] = {
+   /* +X side */
+   br, -br, -br,
+   br, -br,  br,
+   br,  br,  br,
+   br,  br, -br,
+
+   /* -X side */
+   -br,  br, -br,
+   -br,  br,  br,
+   -br, -br,  br,
+   -br, -br, -br,
+
+   /* +Y side */
+   -br,  br, -br,
+   -br,  br,  br,
+    br,  br,  br,
+    br,  br, -br,
+
+   /* -Y side */
+   -br, -br, -br,
+   -br, -br,  br,
+    br, -br,  br,
+    br, -br, -br,
+
+   /* +Z side */
+    br, -br, br,
+   -br, -br, br,
+   -br,  br, br,
+    br,  br, br,
+
+   /* -Z side */
+    br,  br, -br,
+   -br,  br, -br,
+   -br, -br, -br,
+    br, -br, -br,
+};
+
+static void draw_skybox( void )
+{
+   if ( use_vertex_arrays ) {
+      glTexCoordPointer( 3, GL_FLOAT, 0, tex_coords );
+      glVertexPointer(   3, GL_FLOAT, 0, vtx_coords );
+
+      glEnableClientState( GL_TEXTURE_COORD_ARRAY );
+      glEnableClientState( GL_VERTEX_ARRAY );
+
+      glDrawArrays( GL_QUADS, 0, 24 );
+
+      glDisableClientState( GL_TEXTURE_COORD_ARRAY );
+      glDisableClientState( GL_VERTEX_ARRAY );
+   }
+   else {
+      unsigned   i;
+
+      glBegin(GL_QUADS);
+      for ( i = 0 ; i < 24 ; i++ ) {
+	 glTexCoord3fv( & tex_coords[ i * 3 ] );
+	 glVertex3fv  ( & vtx_coords[ i * 3 ] );
+      }
+      glEnd();
+   }
+}
+
+
+static void draw( void )
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glPushMatrix(); /*MODELVIEW*/
+      glTranslatef( 0.0, 0.0, -EyeDist );
+
+      /* skybox */
+      glDisable(GL_TEXTURE_GEN_S);
+      glDisable(GL_TEXTURE_GEN_T);
+      glDisable(GL_TEXTURE_GEN_R);
+
+      glMatrixMode(GL_MODELVIEW);
+      glPushMatrix();
+         glRotatef(Xrot, 1, 0, 0);
+         glRotatef(Yrot, 0, 1, 0);
+         draw_skybox();
+      glPopMatrix();
+
+      /* sphere */
+      glMatrixMode(GL_TEXTURE);
+      glLoadIdentity();
+      glRotatef(-Yrot, 0, 1, 0);
+      glRotatef(-Xrot, 1, 0, 0);
+
+      glEnable(GL_TEXTURE_GEN_S);
+      glEnable(GL_TEXTURE_GEN_T);
+      glEnable(GL_TEXTURE_GEN_R);
+      glutSolidSphere(2.0, 20, 20);
+
+      glLoadIdentity(); /* texture */
+
+      glMatrixMode(GL_MODELVIEW);
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void idle(void)
+{
+   GLfloat t = 0.05 * glutGet(GLUT_ELAPSED_TIME);
+   Yrot = t;
+   glutPostRedisplay();
+}
+
+
+static void set_mode(GLuint mode)
+{
+   if (mode == 0) {
+      glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB);
+      glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB);
+      glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB);
+      printf("GL_REFLECTION_MAP_ARB mode\n");
+   }
+   else if (mode == 1) {
+      glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_ARB);
+      glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_ARB);
+      glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_ARB);
+      printf("GL_NORMAL_MAP_ARB mode\n");
+   }
+}
+
+
+static void key(unsigned char k, int x, int y)
+{
+   static GLuint mode = 0;
+   (void) x;
+   (void) y;
+   switch (k) {
+      case ' ':
+         anim = !anim;
+         if (anim)
+            glutIdleFunc(idle);
+         else
+            glutIdleFunc(NULL);
+         break;
+      case 'm':
+         mode = !mode;
+         set_mode(mode);
+         break;
+      case 'v':
+         use_vertex_arrays = ! use_vertex_arrays;
+         printf( "Vertex arrays are %sabled\n",
+		 (use_vertex_arrays) ? "en" : "dis" );
+         break;
+      case 'z':
+         EyeDist -= 0.5;
+         if (EyeDist < 6.0)
+            EyeDist = 6.0;
+         break;
+      case 'Z':
+         EyeDist += 0.5;
+         if (EyeDist > 90.0)
+            EyeDist = 90;
+         break;
+      case 27:
+         exit(0);
+   }
+   glutPostRedisplay();
+}
+
+
+static void specialkey(int key, int x, int y)
+{
+   GLfloat step = 5;
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         Xrot += step;
+         break;
+      case GLUT_KEY_DOWN:
+         Xrot -= step;
+         break;
+      case GLUT_KEY_LEFT:
+         Yrot -= step;
+         break;
+      case GLUT_KEY_RIGHT:
+         Yrot += step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+/* new window size or exposure */
+static void reshape(int width, int height)
+{
+   GLfloat ar = (float) width / (float) height;
+   glViewport(0, 0, (GLint)width, (GLint)height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum( -2.0*ar, 2.0*ar, -2.0, 2.0, 4.0, 100.0 );
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+}
+
+
+static void init_checkers( void )
+{
+#define CUBE_TEX_SIZE 64
+   GLubyte image[CUBE_TEX_SIZE][CUBE_TEX_SIZE][3];
+   static const GLubyte colors[6][3] = {
+      { 255,   0,   0 },	/* face 0 - red */
+      {   0, 255, 255 },	/* face 1 - cyan */
+      {   0, 255,   0 },	/* face 2 - green */
+      { 255,   0, 255 },	/* face 3 - purple */
+      {   0,   0, 255 },	/* face 4 - blue */
+      { 255, 255,   0 }		/* face 5 - yellow */
+   };
+   static const GLenum targets[6] = {
+      GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
+      GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
+      GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
+      GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
+      GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
+      GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
+   };
+
+   GLint i, j, f;
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+   /* make colored checkerboard cube faces */
+   for (f = 0; f < 6; f++) {
+      for (i = 0; i < CUBE_TEX_SIZE; i++) {
+         for (j = 0; j < CUBE_TEX_SIZE; j++) {
+            if ((i/4 + j/4) & 1) {
+               image[i][j][0] = colors[f][0];
+               image[i][j][1] = colors[f][1];
+               image[i][j][2] = colors[f][2];
+            }
+            else {
+               image[i][j][0] = 255;
+               image[i][j][1] = 255;
+               image[i][j][2] = 255;
+            }
+         }
+      }
+
+      glTexImage2D(targets[f], 0, GL_RGB, CUBE_TEX_SIZE, CUBE_TEX_SIZE, 0,
+                   GL_RGB, GL_UNSIGNED_BYTE, image);
+   }
+}
+
+
+static void load(GLenum target, const char *filename,
+                 GLboolean flipTB, GLboolean flipLR)
+{
+   GLint w, h;
+   GLenum format;
+   GLubyte *img = LoadRGBImage( filename, &w, &h, &format );
+   if (!img) {
+      printf("Error: couldn't load texture image %s\n", filename);
+      exit(1);
+   }
+   assert(format == GL_RGB);
+
+   /* <sigh> the way the texture cube mapping works, we have to flip
+    * images to make things look right.
+    */
+   if (flipTB) {
+      const int stride = 3 * w;
+      GLubyte temp[3*1024];
+      int i;
+      for (i = 0; i < h / 2; i++) {
+         memcpy(temp, img + i * stride, stride);
+         memcpy(img + i * stride, img + (h - i - 1) * stride, stride);
+         memcpy(img + (h - i - 1) * stride, temp, stride);
+      }
+   }
+   if (flipLR) {
+      const int stride = 3 * w;
+      GLubyte temp[3];
+      GLubyte *row;
+      int i, j;
+      for (i = 0; i < h; i++) {
+         row = img + i * stride;
+         for (j = 0; j < w / 2; j++) {
+            int k = w - j - 1;
+            temp[0] = row[j*3+0];
+            temp[1] = row[j*3+1];
+            temp[2] = row[j*3+2];
+            row[j*3+0] = row[k*3+0];
+            row[j*3+1] = row[k*3+1];
+            row[j*3+2] = row[k*3+2];
+            row[k*3+0] = temp[0];
+            row[k*3+1] = temp[1];
+            row[k*3+2] = temp[2];
+         }
+      }
+   }
+
+   gluBuild2DMipmaps(target, GL_RGB, w, h, format, GL_UNSIGNED_BYTE, img);
+   free(img);
+}
+
+
+static void load_envmaps(void)
+{
+   load(GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB, "right.rgb", GL_TRUE, GL_FALSE);
+   load(GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB, "left.rgb", GL_TRUE, GL_FALSE);
+   load(GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB, "top.rgb", GL_FALSE, GL_TRUE);
+   load(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB, "bottom.rgb", GL_FALSE, GL_TRUE);
+   load(GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB, "front.rgb", GL_TRUE, GL_FALSE);
+   load(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB, "back.rgb", GL_TRUE, GL_FALSE);
+}
+
+
+static void init( GLboolean useImageFiles )
+{
+   GLenum filter;
+
+   /* check for extension */
+   {
+      char *exten = (char *) glGetString(GL_EXTENSIONS);
+      if (!strstr(exten, "GL_ARB_texture_cube_map")) {
+         printf("Sorry, this demo requires GL_ARB_texture_cube_map\n");
+         exit(0);
+      }
+   }
+   printf("GL_RENDERER: %s\n", (char *) glGetString(GL_RENDERER));
+
+   if (useImageFiles) {
+      load_envmaps();
+      filter = GL_LINEAR;
+   }
+   else {
+      init_checkers();
+      filter = GL_NEAREST;
+   }
+
+   glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MIN_FILTER, filter);
+   glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MAG_FILTER, filter);
+   glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+   glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+   glEnable(GL_TEXTURE_CUBE_MAP_ARB);
+   glEnable(GL_DEPTH_TEST);
+
+   glClearColor(.3, .3, .3, 0);
+   glColor3f( 1.0, 1.0, 1.0 );
+
+   set_mode(0);
+}
+
+
+static void usage(void)
+{
+   printf("keys:\n");
+   printf("  SPACE - toggle animation\n");
+   printf("  CURSOR KEYS - rotation\n");
+   printf("  m - toggle texgen reflection mode\n");
+   printf("  z/Z - change viewing distance\n");
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(600, 500);
+   glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
+   glutCreateWindow("Texture Cube Mapping");
+
+   if (argc > 1 && strcmp(argv[1] , "-i") == 0)
+      init( 1 );
+   else
+      init( 0 );
+   glutReshapeFunc( reshape );
+   glutKeyboardFunc( key );
+   glutSpecialFunc( specialkey );
+   glutDisplayFunc( draw );
+   if (anim)
+      glutIdleFunc(idle);
+   usage();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/descrip.mms b/progs/demos/descrip.mms
new file mode 100644
index 000000000..cc9350ce6
--- /dev/null
+++ b/progs/demos/descrip.mms
@@ -0,0 +1,90 @@
+# Makefile for GLUT-based demo programs for VMS
+# contributed by Jouk Jansen  joukj@hrem.stm.tudelft.nl
+# Last update : 20 May 2005
+
+.first
+	define gl [--.include.gl]
+
+.include [--]mms-config.
+
+##### MACROS #####
+
+INCDIR = ([--.include],[-.util])
+CFLAGS = /include=$(INCDIR)/prefix=all/name=(as_is,short)
+
+.ifdef SHARE
+GL_LIBS = $(XLIBS)
+LIB_DEP = [--.lib]$(GL_SHAR) [--.lib]$(GLU_SHAR) [--.lib]$(GLUT_SHAR)
+.else
+GL_LIBS = [--.lib]libGLUT/l,libMesaGLU/l,libMesaGL/l,$(XLIBS)
+LIB_DEP = [--.lib]$(GL_LIB) [--.lib]$(GLU_LIB) [--.lib]$(GLUT_LIB)
+.endif
+
+
+PROGS = bounce.exe;,clearspd.exe;,drawpix.exe;,gamma.exe;,gears.exe;,\
+	glinfo.exe;,glutfx.exe;,isosurf.exe;,morph3d.exe;,\
+	paltex.exe;,pointblast.exe;,reflect.exe;,spectex.exe;,stex3d.exe;,\
+	tessdemo.exe;,texcyl.exe;,texobj.exe;,trispd.exe;,winpos.exe;
+
+
+##### RULES #####
+.obj.exe :
+	cxxlink $(MMS$TARGET_NAME),$(GL_LIBS)
+
+##### TARGETS #####
+default :
+	$(MMS)$(MMSQUALIFIERS) $(PROGS)
+
+clean :
+	delete *.obj;*
+
+realclean :
+	delete $(PROGS)
+	delete *.obj;*
+
+bounce.exe; : bounce.obj $(LIB_DEP)
+clearspd.exe; : clearspd.obj $(LIB_DEP)
+drawpix.exe; : drawpix.obj $(LIB_DEP) [-.util]readtex.obj
+	cxxlink $(MMS$TARGET_NAME),[-.util]readtex.obj,$(GL_LIBS)
+gamma.exe; : gamma.obj $(LIB_DEP)
+gears.exe; : gears.obj $(LIB_DEP)
+glinfo.exe; : glinfo.obj $(LIB_DEP)
+glutfx.exe; : glutfx.obj $(LIB_DEP)
+isosurf.exe; : isosurf.obj $(LIB_DEP) [-.util]readtex.obj
+	cxxlink $(MMS$TARGET_NAME),[-.util]readtex.obj,$(GL_LIBS)
+morph3d.exe; : morph3d.obj $(LIB_DEP)
+paltex.exe; : paltex.obj $(LIB_DEP)
+pointblast.exe; : pointblast.obj $(LIB_DEP)
+reflect.exe; : reflect.obj [-.util]readtex.obj [-.util]showbuffer.obj\
+	$(LIB_DEP)
+	cxxlink $(MMS$TARGET_NAME),[-.util]readtex,showbuffer,$(GL_LIBS)
+spectex.exe; : spectex.obj $(LIB_DEP)
+stex3d.exe; : stex3d.obj $(LIB_DEP)
+tessdemo.exe; : tessdemo.obj $(LIB_DEP)
+texcyl.exe; : texcyl.obj [-.util]readtex.obj $(LIB_DEP)
+	cxxlink $(MMS$TARGET_NAME),[-.util]readtex.obj,$(GL_LIBS)
+texobj.exe; : texobj.obj $(LIB_DEP)
+trispd.exe; : trispd.obj $(LIB_DEP)
+winpos.exe; : winpos.obj [-.util]readtex.obj $(LIB_DEP)
+	cxxlink $(MMS$TARGET_NAME),[-.util]readtex.obj,$(GL_LIBS)
+
+
+bounce.obj : bounce.c
+clearspd.obj : clearspd.c
+drawpix.obj : drawpix.c
+gamma.obj : gamma.c
+gears.obj : gears.c
+glinfo.obj : glinfo.c
+glutfx.obj : glutfx.c
+isosurf.obj : isosurf.c
+morph3d.obj : morph3d.c
+paltex.obj : paltex.c
+pointblast.obj : pointblast.c
+reflect.obj : reflect.c
+spectex.obj : spectex.c
+stex3d.obj : stex3d.c
+tessdemo.obj : tessdemo.c
+texcyl.obj : texcyl.c
+texobj.obj : texobj.c
+trispd.obj : trispd.c
+winpos.obj : winpos.c
diff --git a/progs/demos/drawpix.c b/progs/demos/drawpix.c
new file mode 100644
index 000000000..d2f574867
--- /dev/null
+++ b/progs/demos/drawpix.c
@@ -0,0 +1,358 @@
+
+/*
+ * glDrawPixels demo/test/benchmark
+ * 
+ * Brian Paul   September 25, 1997  This file is in the public domain.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <GL/glut.h>
+
+#include "readtex.h"
+
+#define IMAGE_FILE "../images/girl.rgb"
+
+static int ImgWidth, ImgHeight;
+static GLenum ImgFormat;
+static GLubyte *Image = NULL;
+
+static int Xpos, Ypos;
+static int SkipPixels, SkipRows;
+static int DrawWidth, DrawHeight;
+static int Scissor = 0;
+static int Fog = 0;
+static GLfloat Zpos = -1.0;
+static float Xzoom, Yzoom;
+static GLboolean DrawFront = GL_FALSE;
+static GLboolean Dither = GL_TRUE;
+
+
+static void Reset( void )
+{
+   Xpos = Ypos = 20;
+   DrawWidth = ImgWidth;
+   DrawHeight = ImgHeight;
+   SkipPixels = SkipRows = 0;
+   Scissor = 0;
+   Fog = 0;
+   Zpos = -1.0;
+   Xzoom = Yzoom = 1.0;
+}
+
+
+static void Display( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT );
+
+#if 0
+   glRasterPos2i(Xpos, Ypos);
+#else
+   /* This allows negative raster positions: */
+   glRasterPos3f(0, 0, Zpos);
+   glBitmap(0, 0, 0, 0, Xpos, Ypos, NULL);
+#endif
+
+   glPixelStorei(GL_UNPACK_SKIP_PIXELS, SkipPixels);
+   glPixelStorei(GL_UNPACK_SKIP_ROWS, SkipRows);
+
+   glPixelZoom( Xzoom, Yzoom );
+
+   if (Scissor)
+      glEnable(GL_SCISSOR_TEST);
+
+   if (Fog)
+      glEnable(GL_FOG);
+
+   glDrawPixels(DrawWidth, DrawHeight, ImgFormat, GL_UNSIGNED_BYTE, Image);
+
+   glDisable(GL_SCISSOR_TEST);
+   glDisable(GL_FOG);
+
+   if (DrawFront)
+      glFinish();
+   else
+      glutSwapBuffers();
+}
+
+
+static void Benchmark( void )
+{
+   int startTime, endTime;
+   int draws = 500;
+   double seconds, pixelsPerSecond;
+
+   printf("Benchmarking...\n");
+   /* GL set-up */
+   glPixelStorei(GL_UNPACK_SKIP_PIXELS, SkipPixels);
+   glPixelStorei(GL_UNPACK_SKIP_ROWS, SkipRows);
+   glPixelZoom( Xzoom, Yzoom );
+   if (Scissor)
+      glEnable(GL_SCISSOR_TEST);
+   if (Fog)
+      glEnable(GL_FOG);
+
+   if (DrawFront)
+      glDrawBuffer(GL_FRONT);
+   else
+      glDrawBuffer(GL_BACK);
+
+   /* Run timing test */
+   draws = 0;
+   startTime = glutGet(GLUT_ELAPSED_TIME);
+   do {
+      glDrawPixels(DrawWidth, DrawHeight, ImgFormat, GL_UNSIGNED_BYTE, Image);
+      draws++;
+      endTime = glutGet(GLUT_ELAPSED_TIME);
+   } while (endTime - startTime < 4000);   /* 4 seconds */
+
+   /* GL clean-up */
+   glDisable(GL_SCISSOR_TEST);
+   glDisable(GL_FOG);
+
+   /* Results */
+   seconds = (double) (endTime - startTime) / 1000.0;
+   pixelsPerSecond = draws * DrawWidth * DrawHeight / seconds;
+   printf("Result:  %d draws in %f seconds = %f pixels/sec\n",
+          draws, seconds, pixelsPerSecond);
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( 0.0, width, 0.0, height, 0.0, 2.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+
+   glScissor(width/4, height/4, width/2, height/2);
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case ' ':
+         Reset();
+         break;
+      case 'd':
+         Dither = !Dither;
+         if (Dither)
+            glEnable(GL_DITHER);
+         else
+            glDisable(GL_DITHER);
+         break;
+      case 'w':
+         if (DrawWidth > 0)
+            DrawWidth--;
+         break;
+      case 'W':
+         DrawWidth++;
+         break;
+      case 'h':
+         if (DrawHeight > 0)
+            DrawHeight--;
+         break;
+      case 'H':
+         DrawHeight++;
+         break;
+      case 'p':
+         if (SkipPixels > 0)
+             SkipPixels--;
+         break;
+      case 'P':
+         SkipPixels++;
+         break;
+      case 'r':
+         if (SkipRows > 0)
+             SkipRows--;
+         break;
+      case 'R':
+         SkipRows++;
+         break;
+      case 's':
+         Scissor = !Scissor;
+         break;
+      case 'x':
+         Xzoom -= 0.1;
+         break;
+      case 'X':
+         Xzoom += 0.1;
+         break;
+      case 'y':
+         Yzoom -= 0.1;
+         break;
+      case 'Y':
+         Yzoom += 0.1;
+         break;
+      case 'z':
+         Zpos -= 0.1;
+         printf("RasterPos Z = %g\n", Zpos);
+         break;
+      case 'Z':
+         Zpos += 0.1;
+         printf("RasterPos Z = %g\n", Zpos);
+         break;
+      case 'b':
+         Benchmark();
+         break;
+      case 'F':
+         Fog = !Fog;
+         printf("Fog %d\n", Fog);
+         break;
+      case 'f':
+         DrawFront = !DrawFront;
+         if (DrawFront)
+            glDrawBuffer(GL_FRONT);
+         else
+            glDrawBuffer(GL_BACK);
+         printf("glDrawBuffer(%s)\n", DrawFront ? "GL_FRONT" : "GL_BACK");
+         break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         Ypos += 1;
+         break;
+      case GLUT_KEY_DOWN:
+         Ypos -= 1;
+         break;
+      case GLUT_KEY_LEFT:
+         Xpos -= 1;
+         break;
+      case GLUT_KEY_RIGHT:
+         Xpos += 1;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( GLboolean ciMode, const char *filename )
+{
+   static const GLfloat fogColor[4] = {0, 1, 0, 0};
+
+   printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
+   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+
+   Image = LoadRGBImage( filename, &ImgWidth, &ImgHeight, &ImgFormat );
+   if (!Image) {
+      printf("Couldn't read %s\n", filename);
+      exit(0);
+   }
+
+   if (ciMode) {
+      /* Convert RGB image to grayscale */
+      GLubyte *indexImage = (GLubyte *) malloc( ImgWidth * ImgHeight );
+      GLint i;
+      for (i=0; i<ImgWidth*ImgHeight; i++) {
+         int gray = Image[i*3] + Image[i*3+1] + Image[i*3+2];
+         indexImage[i] = gray / 3;
+      }
+      free(Image);
+      Image = indexImage;
+      ImgFormat = GL_COLOR_INDEX;
+
+      for (i=0;i<255;i++) {
+         float g = i / 255.0;
+         glutSetColor(i, g, g, g);
+      }
+   }
+
+   printf("Loaded %d by %d image\n", ImgWidth, ImgHeight );
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   glPixelStorei(GL_UNPACK_ROW_LENGTH, ImgWidth);
+
+   glFogi(GL_FOG_MODE, GL_LINEAR);
+   glFogf(GL_FOG_START, 0);
+   glFogf(GL_FOG_END, 2);
+   glFogfv(GL_FOG_COLOR, fogColor);
+
+   Reset();
+}
+
+
+static void Usage(void)
+{
+   printf("Keys:\n");
+   printf("       SPACE  Reset Parameters\n");
+   printf("     Up/Down  Move image up/down\n");
+   printf("  Left/Right  Move image left/right\n");
+   printf("           x  Decrease X-axis PixelZoom\n");
+   printf("           X  Increase X-axis PixelZoom\n");
+   printf("           y  Decrease Y-axis PixelZoom\n");
+   printf("           Y  Increase Y-axis PixelZoom\n");
+   printf("           w  Decrease glDrawPixels width*\n");
+   printf("           W  Increase glDrawPixels width*\n");
+   printf("           h  Decrease glDrawPixels height*\n");
+   printf("           H  Increase glDrawPixels height*\n");
+   printf("           p  Decrease GL_UNPACK_SKIP_PIXELS*\n");
+   printf("           P  Increase GL_UNPACK_SKIP_PIXELS*\n");
+   printf("           r  Decrease GL_UNPACK_SKIP_ROWS*\n");
+   printf("           R  Increase GL_UNPACK_SKIP_ROWS*\n");
+   printf("           s  Toggle GL_SCISSOR_TEST\n");
+   printf("           F  Toggle GL_FOG\n");
+   printf("           z  Decrease RasterPos Z\n");
+   printf("           Z  Increase RasterPos Z\n");
+   
+   printf("           f  Toggle front/back buffer drawing\n");
+   printf("           b  Benchmark test\n");
+   printf("         ESC  Exit\n");
+   printf("* Warning: no limits are imposed on these parameters so it's\n");
+   printf("  possible to cause a segfault if you go too far.\n");
+}
+
+
+int main( int argc, char *argv[] )
+{
+   GLboolean ciMode = GL_FALSE;
+   const char *filename = IMAGE_FILE;
+   int i = 1;
+
+   if (argc > i && strcmp(argv[i], "-ci")==0) {
+      ciMode = GL_TRUE;
+      i++;
+   }
+   if (argc > i) {
+      filename = argv[i];
+   }
+
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 500, 400 );
+
+   if (ciMode)
+      glutInitDisplayMode( GLUT_INDEX | GLUT_DOUBLE );
+   else
+      glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE);
+
+   glutCreateWindow(argv[0]);
+
+   Init(ciMode, filename);
+   Usage();
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/fire.c b/progs/demos/fire.c
new file mode 100644
index 000000000..dd70f6141
--- /dev/null
+++ b/progs/demos/fire.c
@@ -0,0 +1,777 @@
+/*
+ * This program is under the GNU GPL.
+ * Use at your own risk.
+ *
+ * written by David Bucciarelli (tech.hmw@plus.it)
+ *            Humanware s.r.l.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <time.h>
+#include <string.h>
+
+#ifdef WIN32
+#include <windows.h>
+#include <mmsystem.h>
+#endif
+
+#include <GL/glut.h>
+#include "readtex.h"
+
+#ifdef XMESA
+#include "GL/xmesa.h"
+static int fullscreen = 1;
+#endif
+
+#ifndef M_PI
+#define M_PI 3.1415926535
+#endif
+
+#define vinit(a,i,j,k) {\
+  (a)[0]=i;\
+  (a)[1]=j;\
+  (a)[2]=k;\
+}
+
+#define vinit4(a,i,j,k,w) {\
+  (a)[0]=i;\
+  (a)[1]=j;\
+  (a)[2]=k;\
+  (a)[3]=w;\
+}
+
+
+#define vadds(a,dt,b) {\
+  (a)[0]+=(dt)*(b)[0];\
+  (a)[1]+=(dt)*(b)[1];\
+  (a)[2]+=(dt)*(b)[2];\
+}
+
+#define vequ(a,b) {\
+  (a)[0]=(b)[0];\
+  (a)[1]=(b)[1];\
+  (a)[2]=(b)[2];\
+}
+
+#define vinter(a,dt,b,c) {\
+  (a)[0]=(dt)*(b)[0]+(1.0-dt)*(c)[0];\
+  (a)[1]=(dt)*(b)[1]+(1.0-dt)*(c)[1];\
+  (a)[2]=(dt)*(b)[2]+(1.0-dt)*(c)[2];\
+}
+
+#define clamp(a)        ((a) < 0.0 ? 0.0 : ((a) < 1.0 ? (a) : 1.0))
+
+#define vclamp(v) {\
+  (v)[0]=clamp((v)[0]);\
+  (v)[1]=clamp((v)[1]);\
+  (v)[2]=clamp((v)[2]);\
+}
+
+static int WIDTH = 640;
+static int HEIGHT = 480;
+
+static GLint T0 = 0;
+static GLint Frames = 0;
+static GLint NiceFog = 1;
+
+#define DIMP 20.0
+#define DIMTP 16.0
+
+#define RIDCOL 0.4
+
+#define NUMTREE 50
+#define TREEINR 2.5
+#define TREEOUTR 8.0
+
+#define AGRAV -9.8
+
+typedef struct
+{
+   int age;
+   float p[3][3];
+   float v[3];
+   float c[3][4];
+}
+part;
+
+static float treepos[NUMTREE][3];
+
+static float black[3] = { 0.0, 0.0, 0.0 };
+static float blu[3] = { 1.0, 0.2, 0.0 };
+static float blu2[3] = { 1.0, 1.0, 0.0 };
+
+static float fogcolor[4] = { 1.0, 1.0, 1.0, 1.0 };
+
+static float q[4][3] = {
+   {-DIMP, 0.0, -DIMP},
+   {DIMP, 0.0, -DIMP},
+   {DIMP, 0.0, DIMP},
+   {-DIMP, 0.0, DIMP}
+};
+
+static float qt[4][2] = {
+   {-DIMTP, -DIMTP},
+   {DIMTP, -DIMTP},
+   {DIMTP, DIMTP},
+   {-DIMTP, DIMTP}
+};
+
+static int win = 0;
+
+static int np;
+static float eject_r, dt, maxage, eject_vy, eject_vl;
+static short shadows;
+static float ridtri;
+static int fog = 1;
+static int help = 1;
+static int joyavailable = 0;
+static int joyactive = 0;
+
+static part *p;
+
+static GLuint groundid;
+static GLuint treeid;
+
+static float obs[3] = { 2.0, 1.0, 0.0 };
+static float dir[3];
+static float v = 0.0;
+static float alpha = -84.0;
+static float beta = 90.0;
+
+static float
+vrnd(void)
+{
+   return (((float) rand()) / RAND_MAX);
+}
+
+static void
+setnewpart(part * p)
+{
+   float a, v[3], *c;
+
+   p->age = 0;
+
+   a = vrnd() * 3.14159265359 * 2.0;
+
+   vinit(v, sin(a) * eject_r * vrnd(), 0.15, cos(a) * eject_r * vrnd());
+   vinit(p->p[0], v[0] + vrnd() * ridtri, v[1] + vrnd() * ridtri,
+	 v[2] + vrnd() * ridtri);
+   vinit(p->p[1], v[0] + vrnd() * ridtri, v[1] + vrnd() * ridtri,
+	 v[2] + vrnd() * ridtri);
+   vinit(p->p[2], v[0] + vrnd() * ridtri, v[1] + vrnd() * ridtri,
+	 v[2] + vrnd() * ridtri);
+
+   vinit(p->v, v[0] * eject_vl / (eject_r / 2),
+	 vrnd() * eject_vy + eject_vy / 2, v[2] * eject_vl / (eject_r / 2));
+
+   c = blu;
+
+   vinit4(p->c[0], c[0] * ((1.0 - RIDCOL) + vrnd() * RIDCOL),
+	  c[1] * ((1.0 - RIDCOL) + vrnd() * RIDCOL),
+	  c[2] * ((1.0 - RIDCOL) + vrnd() * RIDCOL), 1.0);
+   vinit4(p->c[1], c[0] * ((1.0 - RIDCOL) + vrnd() * RIDCOL),
+	  c[1] * ((1.0 - RIDCOL) + vrnd() * RIDCOL),
+	  c[2] * ((1.0 - RIDCOL) + vrnd() * RIDCOL), 1.0);
+   vinit4(p->c[2], c[0] * ((1.0 - RIDCOL) + vrnd() * RIDCOL),
+	  c[1] * ((1.0 - RIDCOL) + vrnd() * RIDCOL),
+	  c[2] * ((1.0 - RIDCOL) + vrnd() * RIDCOL), 1.0);
+}
+
+static void
+setpart(part * p)
+{
+   float fact;
+
+   if (p->p[0][1] < 0.1) {
+      setnewpart(p);
+      return;
+   }
+
+   p->v[1] += AGRAV * dt;
+
+   vadds(p->p[0], dt, p->v);
+   vadds(p->p[1], dt, p->v);
+   vadds(p->p[2], dt, p->v);
+
+   p->age++;
+
+   if ((p->age) > maxage) {
+      vequ(p->c[0], blu2);
+      vequ(p->c[1], blu2);
+      vequ(p->c[2], blu2);
+   }
+   else {
+      fact = 1.0 / maxage;
+      vadds(p->c[0], fact, blu2);
+      vclamp(p->c[0]);
+      p->c[0][3] = fact * (maxage - p->age);
+
+      vadds(p->c[1], fact, blu2);
+      vclamp(p->c[1]);
+      p->c[1][3] = fact * (maxage - p->age);
+
+      vadds(p->c[2], fact, blu2);
+      vclamp(p->c[2]);
+      p->c[2][3] = fact * (maxage - p->age);
+   }
+}
+
+static void
+drawtree(float x, float y, float z)
+{
+   glBegin(GL_QUADS);
+   glTexCoord2f(0.0, 0.0);
+   glVertex3f(x - 1.5, y + 0.0, z);
+
+   glTexCoord2f(1.0, 0.0);
+   glVertex3f(x + 1.5, y + 0.0, z);
+
+   glTexCoord2f(1.0, 1.0);
+   glVertex3f(x + 1.5, y + 3.0, z);
+
+   glTexCoord2f(0.0, 1.0);
+   glVertex3f(x - 1.5, y + 3.0, z);
+
+
+   glTexCoord2f(0.0, 0.0);
+   glVertex3f(x, y + 0.0, z - 1.5);
+
+   glTexCoord2f(1.0, 0.0);
+   glVertex3f(x, y + 0.0, z + 1.5);
+
+   glTexCoord2f(1.0, 1.0);
+   glVertex3f(x, y + 3.0, z + 1.5);
+
+   glTexCoord2f(0.0, 1.0);
+   glVertex3f(x, y + 3.0, z - 1.5);
+
+   glEnd();
+
+}
+
+static void
+calcposobs(void)
+{
+   dir[0] = sin(alpha * M_PI / 180.0);
+   dir[2] = cos(alpha * M_PI / 180.0) * sin(beta * M_PI / 180.0);
+   dir[1] = cos(beta * M_PI / 180.0);
+
+   if (dir[0] < 1.0e-5 && dir[0] > -1.0e-5)
+      dir[0] = 0;
+   if (dir[1] < 1.0e-5 && dir[1] > -1.0e-5)
+      dir[1] = 0;
+   if (dir[2] < 1.0e-5 && dir[2] > -1.0e-5)
+      dir[2] = 0;
+
+   obs[0] += v * dir[0];
+   obs[1] += v * dir[1];
+   obs[2] += v * dir[2];
+}
+
+static void
+printstring(void *font, char *string)
+{
+   int len, i;
+
+   len = (int) strlen(string);
+   for (i = 0; i < len; i++)
+      glutBitmapCharacter(font, string[i]);
+}
+
+static void
+reshape(int width, int height)
+{
+   WIDTH = width;
+   HEIGHT = height;
+   glViewport(0, 0, (GLint) width, (GLint) height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluPerspective(70.0, width / (float) height, 0.1, 30.0);
+
+   glMatrixMode(GL_MODELVIEW);
+}
+
+static void
+printhelp(void)
+{
+   glColor4f(0.0, 0.0, 0.0, 0.5);
+   glRecti(40, 40, 600, 440);
+
+   glColor3f(1.0, 0.0, 0.0);
+   glRasterPos2i(300, 420);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Help");
+
+   glRasterPos2i(60, 390);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Toggle Help");
+
+   glRasterPos2i(60, 360);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Increase particle size");
+   glRasterPos2i(60, 330);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "T - Decrease particle size");
+
+   glRasterPos2i(60, 300);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "r - Increase emission radius");
+   glRasterPos2i(60, 270);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "R - Decrease emission radius");
+
+   glRasterPos2i(60, 240);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog");
+   glRasterPos2i(60, 210);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "s - Toggle shadows");
+   glRasterPos2i(60, 180);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate");
+   glRasterPos2i(60, 150);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "a - Increase velocity");
+   glRasterPos2i(60, 120);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "z - Decrease velocity");
+
+   glRasterPos2i(60, 90);
+   if (joyavailable)
+      printstring(GLUT_BITMAP_TIMES_ROMAN_24,
+		  "j - Toggle jostick control (Joystick control available)");
+   else
+      printstring(GLUT_BITMAP_TIMES_ROMAN_24,
+		  "(No Joystick control available)");
+}
+
+static void
+dojoy(void)
+{
+#ifdef WIN32
+   static UINT max[2] = { 0, 0 };
+   static UINT min[2] = { 0xffffffff, 0xffffffff }, center[2];
+   MMRESULT res;
+   JOYINFO joy;
+
+   res = joyGetPos(JOYSTICKID1, &joy);
+
+   if (res == JOYERR_NOERROR) {
+      joyavailable = 1;
+
+      if (max[0] < joy.wXpos)
+	 max[0] = joy.wXpos;
+      if (min[0] > joy.wXpos)
+	 min[0] = joy.wXpos;
+      center[0] = (max[0] + min[0]) / 2;
+
+      if (max[1] < joy.wYpos)
+	 max[1] = joy.wYpos;
+      if (min[1] > joy.wYpos)
+	 min[1] = joy.wYpos;
+      center[1] = (max[1] + min[1]) / 2;
+
+      if (joyactive) {
+	 if (fabs(center[0] - (float) joy.wXpos) > 0.1 * (max[0] - min[0]))
+	    alpha +=
+	       2.5 * (center[0] - (float) joy.wXpos) / (max[0] - min[0]);
+	 if (fabs(center[1] - (float) joy.wYpos) > 0.1 * (max[1] - min[1]))
+	    beta += 2.5 * (center[1] - (float) joy.wYpos) / (max[1] - min[1]);
+
+	 if (joy.wButtons & JOY_BUTTON1)
+	    v += 0.01;
+	 if (joy.wButtons & JOY_BUTTON2)
+	    v -= 0.01;
+      }
+   }
+   else
+      joyavailable = 0;
+#endif
+}
+
+static void
+drawfire(void)
+{
+   static char frbuf[80] = "";
+   int j;
+   static double t0 = -1.;
+   double t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = (t - t0) * 1.0;
+   t0 = t;
+
+   dojoy();
+
+   if (NiceFog)
+      glHint(GL_FOG_HINT, GL_NICEST);
+   else
+      glHint(GL_FOG_HINT, GL_DONT_CARE);
+
+   glEnable(GL_DEPTH_TEST);
+
+   if (fog)
+      glEnable(GL_FOG);
+   else
+      glDisable(GL_FOG);
+
+   glDepthMask(GL_TRUE);
+   glClearColor(1.0, 1.0, 1.0, 1.0);
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glPushMatrix();
+   calcposobs();
+   gluLookAt(obs[0], obs[1], obs[2],
+	     obs[0] + dir[0], obs[1] + dir[1], obs[2] + dir[2],
+	     0.0, 1.0, 0.0);
+
+   glColor4f(1.0, 1.0, 1.0, 1.0);
+
+   glEnable(GL_TEXTURE_2D);
+
+   glBindTexture(GL_TEXTURE_2D, groundid);
+#if 1
+   glBegin(GL_QUADS);
+   glTexCoord2fv(qt[0]);
+   glVertex3fv(q[0]);
+   glTexCoord2fv(qt[1]);
+   glVertex3fv(q[1]);
+   glTexCoord2fv(qt[2]);
+   glVertex3fv(q[2]);
+   glTexCoord2fv(qt[3]);
+   glVertex3fv(q[3]);
+   glEnd();
+#else
+   /* Subdivide the ground into a bunch of quads.  This improves fog
+    * if GL_FOG_HINT != GL_NICEST
+    */
+   {
+      float x, y;
+      float dx = 1.0, dy = 1.0;
+      glBegin(GL_QUADS);
+      for (y = -DIMP; y < DIMP; y += 1.0) {
+         for (x = -DIMP; x < DIMP; x += 1.0) {
+            glTexCoord2f(0, 0);   glVertex3f(x, 0, y);
+            glTexCoord2f(1, 0);   glVertex3f(x+dx, 0, y);
+            glTexCoord2f(1, 1);   glVertex3f(x+dx, 0, y+dy);
+            glTexCoord2f(0, 1);   glVertex3f(x, 0, y+dy);
+         }
+      }
+      glEnd();
+   }
+#endif
+
+
+   glEnable(GL_ALPHA_TEST);
+   glAlphaFunc(GL_GEQUAL, 0.9);
+
+   glBindTexture(GL_TEXTURE_2D, treeid);
+   for (j = 0; j < NUMTREE; j++)
+      drawtree(treepos[j][0], treepos[j][1], treepos[j][2]);
+
+   glDisable(GL_TEXTURE_2D);
+   glDepthMask(GL_FALSE);
+   glDisable(GL_ALPHA_TEST);
+
+   if (shadows) {
+      glBegin(GL_TRIANGLES);
+      for (j = 0; j < np; j++) {
+	 glColor4f(black[0], black[1], black[2], p[j].c[0][3]);
+	 glVertex3f(p[j].p[0][0], 0.1, p[j].p[0][2]);
+
+	 glColor4f(black[0], black[1], black[2], p[j].c[1][3]);
+	 glVertex3f(p[j].p[1][0], 0.1, p[j].p[1][2]);
+
+	 glColor4f(black[0], black[1], black[2], p[j].c[2][3]);
+	 glVertex3f(p[j].p[2][0], 0.1, p[j].p[2][2]);
+      }
+      glEnd();
+   }
+
+   glBegin(GL_TRIANGLES);
+   for (j = 0; j < np; j++) {
+      glColor4fv(p[j].c[0]);
+      glVertex3fv(p[j].p[0]);
+
+      glColor4fv(p[j].c[1]);
+      glVertex3fv(p[j].p[1]);
+
+      glColor4fv(p[j].c[2]);
+      glVertex3fv(p[j].p[2]);
+
+      setpart(&p[j]);
+   }
+   glEnd();
+
+   glDisable(GL_TEXTURE_2D);
+   glDisable(GL_ALPHA_TEST);
+   glDisable(GL_DEPTH_TEST);
+   glDisable(GL_FOG);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-0.5, 639.5, -0.5, 479.5, -1.0, 1.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+
+   glColor3f(1.0, 0.0, 0.0);
+   glRasterPos2i(10, 10);
+   printstring(GLUT_BITMAP_HELVETICA_18, frbuf);
+   glRasterPos2i(370, 470);
+   printstring(GLUT_BITMAP_HELVETICA_10,
+	       "Fire V1.5 Written by David Bucciarelli (tech.hmw@plus.it)");
+
+   if (help)
+      printhelp();
+
+   reshape(WIDTH, HEIGHT);
+   glPopMatrix();
+
+   glutSwapBuffers();
+
+   Frames++;
+   {
+      GLint t = glutGet(GLUT_ELAPSED_TIME);
+      if (t - T0 >= 2000) {
+         GLfloat seconds = (t - T0) / 1000.0;
+         GLfloat fps = Frames / seconds;
+         sprintf(frbuf, "Frame rate: %f", fps);
+         T0 = t;
+         Frames = 0;
+      }
+   }
+}
+
+
+static void
+idle(void)
+{
+   glutPostRedisplay();
+}
+
+
+static void
+special(int key, int x, int y)
+{
+   switch (key) {
+   case GLUT_KEY_LEFT:
+      alpha += 2.0;
+      break;
+   case GLUT_KEY_RIGHT:
+      alpha -= 2.0;
+      break;
+   case GLUT_KEY_DOWN:
+      beta -= 2.0;
+      break;
+   case GLUT_KEY_UP:
+      beta += 2.0;
+      break;
+   }
+   glutPostRedisplay();
+}
+
+static void
+key(unsigned char key, int x, int y)
+{
+   switch (key) {
+   case 27:
+      exit(0);
+      break;
+
+   case 'a':
+      v += 0.0005;
+      break;
+   case 'z':
+      v -= 0.0005;
+      break;
+
+   case 'j':
+      joyactive = (!joyactive);
+      break;
+   case 'h':
+      help = (!help);
+      break;
+   case 'f':
+      fog = (!fog);
+      break;
+   case 's':
+      shadows = !shadows;
+      break;
+   case 'R':
+      eject_r -= 0.03;
+      break;
+   case 'r':
+      eject_r += 0.03;
+      break;
+   case 't':
+      ridtri += 0.005;
+      break;
+   case 'T':
+      ridtri -= 0.005;
+      break;
+#ifdef XMESA
+   case ' ':
+      XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
+      fullscreen = (!fullscreen);
+      break;
+#endif
+   case 'n':
+      NiceFog = !NiceFog;
+      printf("NiceFog %d\n", NiceFog);
+      break;
+   }
+   glutPostRedisplay();
+}
+
+static void
+inittextures(void)
+{
+   GLenum gluerr;
+   GLubyte tex[128][128][4];
+
+   glGenTextures(1, &groundid);
+   glBindTexture(GL_TEXTURE_2D, groundid);
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
+   if (!LoadRGBMipmaps("../images/s128.rgb", GL_RGB)) {
+      fprintf(stderr, "Error reading a texture.\n");
+      exit(-1);
+   }
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+		   GL_LINEAR_MIPMAP_LINEAR);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
+
+   glGenTextures(1, &treeid);
+   glBindTexture(GL_TEXTURE_2D, treeid);
+
+   if (1)
+   {
+      int w, h;
+      GLenum format;
+      int x, y;
+      GLubyte *image = LoadRGBImage("../images/tree3.rgb", &w, &h, &format);
+
+      if (!image) {
+	 fprintf(stderr, "Error reading a texture.\n");
+	 exit(-1);
+      }
+
+      for (y = 0; y < 128; y++)
+	 for (x = 0; x < 128; x++) {
+	    tex[x][y][0] = image[(y + x * 128) * 3];
+	    tex[x][y][1] = image[(y + x * 128) * 3 + 1];
+	    tex[x][y][2] = image[(y + x * 128) * 3 + 2];
+	    if ((tex[x][y][0] == tex[x][y][1]) &&
+		(tex[x][y][1] == tex[x][y][2]) && (tex[x][y][2] == 255))
+	       tex[x][y][3] = 0;
+	    else
+	       tex[x][y][3] = 255;
+	 }
+
+      if ((gluerr = gluBuild2DMipmaps(GL_TEXTURE_2D, 4, 128, 128, GL_RGBA,
+				      GL_UNSIGNED_BYTE, (GLvoid *) (tex)))) {
+	 fprintf(stderr, "GLULib%s\n", (char *) gluErrorString(gluerr));
+	 exit(-1);
+      }
+   }
+   else {
+      if (!LoadRGBMipmaps("../images/tree2.rgba", GL_RGBA)) {
+	 fprintf(stderr, "Error reading a texture.\n");
+	 exit(-1);
+      }
+   }
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+		   GL_LINEAR_MIPMAP_LINEAR);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+}
+
+static void
+inittree(void)
+{
+   int i;
+   float dist;
+
+   for (i = 0; i < NUMTREE; i++)
+      do {
+	 treepos[i][0] = vrnd() * TREEOUTR * 2.0 - TREEOUTR;
+	 treepos[i][1] = 0.0;
+	 treepos[i][2] = vrnd() * TREEOUTR * 2.0 - TREEOUTR;
+	 dist =
+	    sqrt(treepos[i][0] * treepos[i][0] +
+		 treepos[i][2] * treepos[i][2]);
+      } while ((dist < TREEINR) || (dist > TREEOUTR));
+}
+
+int
+main(int ac, char **av)
+{
+   int i;
+
+   fprintf(stderr,
+	   "Fire V1.5\nWritten by David Bucciarelli (tech.hmw@plus.it)\n");
+
+   /* Default settings */
+
+   np = 800;
+   eject_r = -0.65;
+   dt = 0.015;
+   eject_vy = 4;
+   eject_vl = 1;
+   shadows = 1;
+   ridtri = 0.25;
+
+   maxage = 1.0 / dt;
+
+   if (ac == 2)
+      np = atoi(av[1]);
+
+   if (ac == 4) {
+      WIDTH = atoi(av[2]);
+      HEIGHT = atoi(av[3]);
+   }
+
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(WIDTH, HEIGHT);
+   glutInit(&ac, av);
+
+   glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
+
+   if (!(win = glutCreateWindow("Fire"))) {
+      fprintf(stderr, "Error opening a window.\n");
+      exit(-1);
+   }
+
+   reshape(WIDTH, HEIGHT);
+
+   inittextures();
+
+   glShadeModel(GL_FLAT);
+   glEnable(GL_DEPTH_TEST);
+
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+   glEnable(GL_FOG);
+   glFogi(GL_FOG_MODE, GL_EXP);
+   glFogfv(GL_FOG_COLOR, fogcolor);
+   glFogf(GL_FOG_DENSITY, 0.1);
+
+   p = (part *) malloc(sizeof(part) * np);
+
+   for (i = 0; i < np; i++)
+      setnewpart(&p[i]);
+
+   inittree();
+
+   glutKeyboardFunc(key);
+   glutSpecialFunc(special);
+   glutDisplayFunc(drawfire);
+   glutIdleFunc(idle);
+   glutReshapeFunc(reshape);
+   glutMainLoop();
+
+   return (0);
+}
diff --git a/progs/demos/fogcoord.c b/progs/demos/fogcoord.c
new file mode 100644
index 000000000..19a15f05b
--- /dev/null
+++ b/progs/demos/fogcoord.c
@@ -0,0 +1,420 @@
+/*
+ * EXT_fog_coord.
+ *
+ * Based on glutskel.c by Brian Paul
+ * and NeHe's Volumetric fog tutorial!
+ *
+ * Daniel Borca
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+
+#include "readtex.h"
+
+#define TEXTURE_FILE "../images/bw.rgb"
+
+#define ARRAYS 0     /* use glDrawElements   */
+
+#define VERBOSE 1    /* tell me what happens */
+
+#define DEPTH 15.0f
+
+#if !defined(GLAPIENTRYP)
+#    define GLAPIENTRYP *
+#endif
+
+typedef void (GLAPIENTRYP GLFOGCOORDFEXTPROC) (GLfloat f);
+typedef void (GLAPIENTRYP GLFOGCOORDPOINTEREXTPROC) (GLenum, GLsizei, const GLvoid *);
+
+static GLFOGCOORDFEXTPROC glFogCoordf_ext;
+#if ARRAYS
+static GLFOGCOORDPOINTEREXTPROC glFogCoordPointer_ext;
+#endif
+static GLboolean have_fog_coord;
+
+static GLfloat camz;
+static GLuint texture[1];
+
+static GLint fogMode;
+static GLboolean fogCoord;
+static GLfloat fogDensity = 0.75;
+static GLfloat fogStart = 1.0, fogEnd = 40.0;
+static GLfloat fogColor[4] = {0.6f, 0.3f, 0.0f, 1.0f};
+
+
+static void APIENTRY glFogCoordf_nop (GLfloat f)
+{
+   (void)f;
+}
+
+
+static int BuildTexture (const char *filename, GLuint texid[])
+{
+   GLubyte *tex_data;
+   GLenum tex_format;
+   GLint tex_width, tex_height;
+
+   tex_data = LoadRGBImage(filename, &tex_width, &tex_height, &tex_format);
+   if (tex_data == NULL) {
+      return -1;
+   }
+
+   {
+      GLint tex_max;
+      glGetIntegerv(GL_MAX_TEXTURE_SIZE, &tex_max);
+      if ((tex_width > tex_max) || (tex_height > tex_max)) {
+         return -1;
+      }
+   }
+
+   glGenTextures(1, texid);
+   
+   glBindTexture(GL_TEXTURE_2D, texid[0]);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   glTexImage2D(GL_TEXTURE_2D, 0, tex_format, tex_width, tex_height, 0,
+                tex_format, GL_UNSIGNED_BYTE, tex_data);
+
+   return 0;
+}
+
+
+static int SetFogMode (GLint fogMode)
+{
+   fogMode &= 3;
+   switch (fogMode) {
+   case 0:
+      glDisable(GL_FOG);
+#if VERBOSE
+      printf("fog(disable)\n");
+#endif
+      break;
+   case 1:
+      glEnable(GL_FOG);
+      glFogi(GL_FOG_MODE, GL_LINEAR);
+      glFogf(GL_FOG_START, fogStart);
+      glFogf(GL_FOG_END, fogEnd);
+#if VERBOSE
+      printf("fog(GL_LINEAR, %.2f, %.2f)\n", fogStart, fogEnd);
+#endif
+      break;
+   case 2:
+      glEnable(GL_FOG);
+      glFogi(GL_FOG_MODE, GL_EXP);
+      glFogf(GL_FOG_DENSITY, fogDensity);
+#if VERBOSE
+      printf("fog(GL_EXP, %.2f)\n", fogDensity);
+#endif
+      break;
+   case 3:
+      glEnable(GL_FOG);
+      glFogi(GL_FOG_MODE, GL_EXP2);
+      glFogf(GL_FOG_DENSITY, fogDensity);
+#if VERBOSE
+      printf("fog(GL_EXP2, %.2f)\n", fogDensity);
+#endif
+      break;
+   }
+   return fogMode;
+}
+
+
+static GLboolean SetFogCoord (GLboolean fogCoord)
+{
+   glFogCoordf_ext = glFogCoordf_nop;
+
+   if (!have_fog_coord) {
+#if VERBOSE
+      printf("fog(GL_FRAGMENT_DEPTH_EXT)%s\n", fogCoord ? " EXT_fog_coord not available!" : "");
+#endif
+      return GL_FALSE;
+   }
+
+   if (fogCoord) {
+      glFogCoordf_ext = (GLFOGCOORDFEXTPROC)glutGetProcAddress("glFogCoordfEXT");
+      glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FOG_COORDINATE_EXT);
+#if VERBOSE
+      printf("fog(GL_FOG_COORDINATE_EXT)\n");
+#endif
+   } else {
+      glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FRAGMENT_DEPTH_EXT);
+#if VERBOSE
+      printf("fog(GL_FRAGMENT_DEPTH_EXT)\n");
+#endif
+   }
+   return fogCoord;
+}
+
+
+#if ARRAYS
+/* could reuse vertices */
+static GLuint vertex_index[] = {
+   /* Back */
+   0, 1, 2, 3,
+
+   /* Floor */
+   4, 5, 6, 7,
+
+   /* Roof */
+   8, 9, 10, 11,
+
+   /* Right */
+   12, 13, 14, 15,
+
+   /* Left */
+   16, 17, 18, 19
+};
+
+static GLfloat vertex_pointer[][3] = {
+   /* Back */
+   {-2.5f,-2.5f,-DEPTH}, { 2.5f,-2.5f,-DEPTH}, { 2.5f, 2.5f,-DEPTH}, {-2.5f, 2.5f,-DEPTH},
+
+   /* Floor */
+   {-2.5f,-2.5f,-DEPTH}, { 2.5f,-2.5f,-DEPTH}, { 2.5f,-2.5f, DEPTH}, {-2.5f,-2.5f, DEPTH},
+
+   /* Roof */
+   {-2.5f, 2.5f,-DEPTH}, { 2.5f, 2.5f,-DEPTH}, { 2.5f, 2.5f, DEPTH}, {-2.5f, 2.5f, DEPTH},
+
+   /* Right */
+   { 2.5f,-2.5f, DEPTH}, { 2.5f, 2.5f, DEPTH}, { 2.5f, 2.5f,-DEPTH}, { 2.5f,-2.5f,-DEPTH},
+
+   /* Left */
+   {-2.5f,-2.5f, DEPTH}, {-2.5f, 2.5f, DEPTH}, {-2.5f, 2.5f,-DEPTH}, {-2.5f,-2.5f,-DEPTH}
+};
+
+static GLfloat texcoord_pointer[][2] = {
+   /* Back */
+   {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f},
+
+   /* Floor */
+   {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f},
+
+   /* Roof */
+   {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f},
+
+   /* Right */
+   {0.0f, 0.0f}, {0.0f, 1.0f}, {1.0f, 1.0f}, {1.0f, 0.0f},
+
+   /* Left */
+   {0.0f, 0.0f}, {0.0f, 1.0f}, {1.0f, 1.0f}, {1.0f, 0.0f}
+};
+
+static GLfloat fogcoord_pointer[][1] = {
+   /* Back */
+   {1.0f}, {1.0f}, {1.0f}, {1.0f},
+
+   /* Floor */
+   {1.0f}, {1.0f}, {0.0f}, {0.0f},
+
+   /* Roof */
+   {1.0f}, {1.0f}, {0.0f}, {0.0f},
+
+   /* Right */
+   {0.0f}, {0.0f}, {1.0f}, {1.0f},
+
+   /* Left */
+   {0.0f}, {0.0f}, {1.0f}, {1.0f}
+};
+#endif
+
+
+static void Display( void )
+{
+   glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   glLoadIdentity ();
+   
+   glTranslatef(0.0f, 0.0f, camz);
+
+#if ARRAYS
+   glDrawElements(GL_QUADS, sizeof(vertex_index) / sizeof(vertex_index[0]), GL_UNSIGNED_INT, vertex_index);
+#else
+   /* Back */
+   glBegin(GL_QUADS);
+   glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f,-2.5f,-DEPTH);
+   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f,-2.5f,-DEPTH);
+   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f, 2.5f,-DEPTH);
+   glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f, 2.5f,-DEPTH);
+   glEnd();
+
+   /* Floor */
+   glBegin(GL_QUADS);
+   glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f,-2.5f,-DEPTH);
+   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f,-2.5f,-DEPTH);
+   glFogCoordf_ext(0.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f,-2.5f, DEPTH);
+   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f,-2.5f, DEPTH);
+   glEnd();
+
+   /* Roof */
+   glBegin(GL_QUADS);
+   glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f, 2.5f,-DEPTH);
+   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f, 2.5f,-DEPTH);
+   glFogCoordf_ext(0.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f, 2.5f, DEPTH);
+   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f, 2.5f, DEPTH);
+   glEnd();
+
+   /* Right */
+   glBegin(GL_QUADS);
+   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f( 2.5f,-2.5f, DEPTH);
+   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f( 2.5f, 2.5f, DEPTH);
+   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f, 2.5f,-DEPTH);
+   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f,-2.5f,-DEPTH);
+   glEnd();
+
+   /* Left */
+   glBegin(GL_QUADS);
+   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f,-2.5f, DEPTH);
+   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f, 2.5f, DEPTH);
+   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f(-2.5f, 2.5f,-DEPTH);
+   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f(-2.5f,-2.5f,-DEPTH);
+   glEnd();
+#endif
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport(0, 0, width, height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluPerspective(45.0f, (GLfloat)(width)/(GLfloat)(height), 0.1f, 100.0f);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 'f':
+         fogMode = SetFogMode(fogMode + 1);
+         break;
+      case '+':
+         if (fogDensity < 1.0) {
+            fogDensity += 0.05;
+         }
+         SetFogMode(fogMode);
+         break;
+      case '-':
+         if (fogDensity > 0.0) {
+            fogDensity -= 0.05;
+         }
+         SetFogMode(fogMode);
+         break;
+      case 's':
+         if (fogStart > 0.0) {
+            fogStart -= 1.0;
+         }
+         SetFogMode(fogMode);
+         break;
+      case 'S':
+         if (fogStart < fogEnd) {
+            fogStart += 1.0;
+         }
+         SetFogMode(fogMode);
+         break;
+      case 'e':
+         if (fogEnd > fogStart) {
+            fogEnd -= 1.0;
+         }
+         SetFogMode(fogMode);
+         break;
+      case 'E':
+         if (fogEnd < 100.0) {
+            fogEnd += 1.0;
+         }
+         SetFogMode(fogMode);
+         break;
+      case 'c':
+         fogCoord = SetFogCoord(fogCoord ^ GL_TRUE);
+         break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         if (camz < (DEPTH - 1.0)) {
+            camz += 1.0f;
+         }
+         break;
+      case GLUT_KEY_DOWN:
+         if (camz > -19.0) {
+            camz -= 1.0f;
+         }
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+   have_fog_coord = glutExtensionSupported("GL_EXT_fog_coord");
+
+   if (BuildTexture(TEXTURE_FILE, texture) == -1) {
+      exit(1);
+   }
+
+   glEnable(GL_TEXTURE_2D);
+   glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
+   glClearDepth(1.0f);
+   glDepthFunc(GL_LEQUAL);
+   glEnable(GL_DEPTH_TEST);
+   glShadeModel(GL_SMOOTH);
+   glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
+
+   glFogfv(GL_FOG_COLOR, fogColor);
+   glHint(GL_FOG_HINT, GL_NICEST);
+   fogCoord = SetFogCoord(GL_TRUE); /* try to enable fog_coord */
+   fogMode = SetFogMode(2);         /* GL_EXP */
+
+   camz = -19.0f;
+
+#if ARRAYS
+   glEnableClientState(GL_VERTEX_ARRAY);
+   glVertexPointer(3, GL_FLOAT, 0, vertex_pointer);
+
+   glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+   glTexCoordPointer(2, GL_FLOAT, 0, texcoord_pointer);
+
+   if (have_fog_coord) {
+      glFogCoordPointer_ext = (GLFOGCOORDPOINTEREXTPROC)glutGetProcAddress("glFogCoordPointerEXT");
+      glEnableClientState(GL_FOG_COORDINATE_ARRAY_EXT);
+      glFogCoordPointer_ext(GL_FLOAT, 0, fogcoord_pointer);
+   }
+#endif
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 640, 480 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+   glutCreateWindow(argv[0]);
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+   Init();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/fplight.c b/progs/demos/fplight.c
new file mode 100644
index 000000000..c7a38248d
--- /dev/null
+++ b/progs/demos/fplight.c
@@ -0,0 +1,285 @@
+/*
+ * Use GL_NV_fragment_program to implement per-pixel lighting.
+ *
+ * Brian Paul
+ * 7 April 2003
+ */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#define GL_GLEXT_PROTOTYPES
+#include <GL/glut.h>
+
+
+static GLfloat Diffuse[4] = { 0.5, 0.5, 1.0, 1.0 };
+static GLfloat Specular[4] = { 0.8, 0.8, 0.8, 1.0 };
+static GLfloat LightPos[4] = { 0.0, 10.0, 20.0, 1.0 };
+static GLfloat Delta = 1.0;
+
+static GLuint FragProg;
+static GLuint VertProg;
+static GLboolean Anim = GL_TRUE;
+static GLboolean Wire = GL_FALSE;
+static GLboolean PixelLight = GL_TRUE;
+
+static GLfloat Xrot = 0, Yrot = 0;
+
+
+#define NAMED_PARAMETER4FV(prog, name, v)        \
+  glProgramNamedParameter4fvNV(prog, strlen(name), (const GLubyte *) name, v)
+
+
+static void Display( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   if (PixelLight) {
+#if defined(GL_NV_fragment_program)
+      NAMED_PARAMETER4FV(FragProg, "LightPos", LightPos);
+      glEnable(GL_FRAGMENT_PROGRAM_NV);
+      glEnable(GL_VERTEX_PROGRAM_NV);
+#endif
+      glDisable(GL_LIGHTING);
+   }
+   else {
+      glLightfv(GL_LIGHT0, GL_POSITION, LightPos);
+#if defined(GL_NV_fragment_program)
+      glDisable(GL_FRAGMENT_PROGRAM_NV);
+      glDisable(GL_VERTEX_PROGRAM_NV);
+#endif
+      glEnable(GL_LIGHTING);
+   }
+
+   glPushMatrix();
+   glRotatef(Xrot, 1, 0, 0);
+   glRotatef(Yrot, 0, 1, 0);
+
+#if 1
+   glutSolidSphere(2.0, 10, 5);
+#else
+   {
+      GLUquadricObj *q = gluNewQuadric();
+      gluQuadricNormals(q, GL_SMOOTH);
+      gluQuadricTexture(q, GL_TRUE);
+      glRotatef(90, 1, 0, 0);
+      glTranslatef(0, 0, -1);
+      gluCylinder(q, 1.0, 1.0, 2.0, 24, 1);
+      gluDeleteQuadric(q);
+   }
+#endif
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void Idle(void)
+{
+   LightPos[0] += Delta;
+   if (LightPos[0] > 25.0)
+      Delta = -1.0;
+   else if (LightPos[0] <- 25.0)
+      Delta = 1.0;
+   glutPostRedisplay();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
+   /*glOrtho( -2.0, 2.0, -2.0, 2.0, 5.0, 25.0 );*/
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -15.0 );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+     case ' ':
+        Anim = !Anim;
+        if (Anim)
+           glutIdleFunc(Idle);
+        else
+           glutIdleFunc(NULL);
+        break;
+      case 'x':
+         LightPos[0] -= 1.0;
+         break;
+      case 'X':
+         LightPos[0] += 1.0;
+         break;
+      case 'w':
+         Wire = !Wire;
+         if (Wire)
+            glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+         else
+            glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+         break;
+      case 'p':
+         PixelLight = !PixelLight;
+         if (PixelLight) {
+            printf("Per-pixel lighting\n");
+         }
+         else {
+            printf("Conventional lighting\n");
+         }
+         break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+static void SpecialKey( int key, int x, int y )
+{
+   const GLfloat step = 3.0;
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         Xrot -= step;
+         break;
+      case GLUT_KEY_DOWN:
+         Xrot += step;
+         break;
+      case GLUT_KEY_LEFT:
+         Yrot -= step;
+         break;
+      case GLUT_KEY_RIGHT:
+         Yrot += step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+   static const char *fragProgramText =
+      "!!FP1.0\n"
+      "DECLARE Diffuse; \n"
+      "DECLARE Specular; \n"
+      "DECLARE LightPos; \n"
+
+      "# Compute normalized LightPos, put it in R0\n"
+      "DP3 R0.x, LightPos, LightPos;\n"
+      "RSQ R0.y, R0.x;\n"
+      "MUL R0, LightPos, R0.y;\n"
+
+      "# Compute normalized normal, put it in R1\n"
+      "DP3 R1, f[TEX0], f[TEX0]; \n"
+      "RSQ R1.y, R1.x;\n"
+      "MUL R1, f[TEX0], R1.y;\n"
+
+      "# Compute dot product of light direction and normal vector\n"
+      "DP3_SAT R2, R0, R1;"
+
+      "MUL R3, Diffuse, R2;    # diffuse attenuation\n"
+
+      "POW R4, R2.x, {20.0}.x; # specular exponent\n"
+
+      "MUL R5, Specular, R4;   # specular attenuation\n"
+
+      "ADD o[COLR], R3, R5;    # add diffuse and specular colors\n"
+      "END \n"
+      ;
+
+   static const char *vertProgramText =
+      "!!VP1.0\n"
+      "# typical modelview/projection transform\n"
+      "DP4   o[HPOS].x, c[0], v[OPOS] ;\n"
+      "DP4   o[HPOS].y, c[1], v[OPOS] ;\n"
+      "DP4   o[HPOS].z, c[2], v[OPOS] ;\n"
+      "DP4   o[HPOS].w, c[3], v[OPOS] ;\n"
+      "# transform normal by inv transpose of modelview, put in tex0\n"
+      "DP3   o[TEX0].x, c[4], v[NRML] ;\n"
+      "DP3   o[TEX0].y, c[5], v[NRML] ;\n"
+      "DP3   o[TEX0].z, c[6], v[NRML] ;\n"
+      "DP3   o[TEX0].w, c[7], v[NRML] ;\n"
+      "END\n";
+   ;
+
+   if (!glutExtensionSupported("GL_NV_vertex_program")) {
+      printf("Sorry, this demo requires GL_NV_vertex_program\n");
+      exit(1);
+   }
+   if (!glutExtensionSupported("GL_NV_fragment_program")) {
+      printf("Sorry, this demo requires GL_NV_fragment_program\n");
+      exit(1);
+   }
+         
+#if defined(GL_NV_fragment_program)
+   glGenProgramsNV(1, &FragProg);
+   assert(FragProg > 0);
+   glGenProgramsNV(1, &VertProg);
+   assert(VertProg > 0);
+
+   /*
+    * Fragment program
+    */
+   glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, FragProg,
+                   strlen(fragProgramText),
+                   (const GLubyte *) fragProgramText);
+   assert(glIsProgramNV(FragProg));
+   glBindProgramNV(GL_FRAGMENT_PROGRAM_NV, FragProg);
+
+   NAMED_PARAMETER4FV(FragProg, "Diffuse", Diffuse);
+   NAMED_PARAMETER4FV(FragProg, "Specular", Specular);
+
+   /*
+    * Vertex program
+    */
+   glLoadProgramNV(GL_VERTEX_PROGRAM_NV, VertProg,
+                   strlen(vertProgramText),
+                   (const GLubyte *) vertProgramText);
+   assert(glIsProgramNV(VertProg));
+   glBindProgramNV(GL_VERTEX_PROGRAM_NV, VertProg);
+   glTrackMatrixNV(GL_VERTEX_PROGRAM_NV, 0, GL_MODELVIEW_PROJECTION_NV, GL_IDENTITY_NV);
+   glTrackMatrixNV(GL_VERTEX_PROGRAM_NV, 4, GL_MODELVIEW, GL_INVERSE_TRANSPOSE_NV);
+#endif
+
+   /*
+    * Misc init
+    */
+   glClearColor(0.3, 0.3, 0.3, 0.0);
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_LIGHT0);
+   glEnable(GL_LIGHTING);
+   glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, Diffuse);
+   glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, Specular);
+   glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 20.0);
+
+   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+   printf("Press p to toggle between per-pixel and per-vertex lighting\n");
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 200, 200 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+   glutCreateWindow(argv[0]);
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+   if (Anim)
+      glutIdleFunc(Idle);
+   Init();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/gamma.c b/progs/demos/gamma.c
new file mode 100644
index 000000000..9b2c3e105
--- /dev/null
+++ b/progs/demos/gamma.c
@@ -0,0 +1,162 @@
+
+/* Draw test patterns to help determine correct gamma value for a display.
+   When the intensities of the inner squares nearly match the intensities
+   of their frames (from some distance the borders should disappear) then
+   you've found the right gamma value.
+
+   You can set Mesa's gamma values (for red, green and blue) with the
+   MESA_GAMMA environment variable.  But only on X windows!
+   For example:
+        setenv MESA_GAMMA 1.5 1.6 1.4
+   Sets the red gamma value to 1.5, green to 1.6 and blue to 1.4.
+   See the main README file for more information.
+
+   For more info about gamma correction see:
+   http://www.inforamp.net/~poynton/notes/colour_and_gamma/GammaFAQ.html
+
+   This program is in the public domain
+
+   Brian Paul  19 Oct 1995
+   Kai Schuetz 05 Jun 1999 */
+
+/* Conversion to GLUT by Mark J. Kilgard */
+
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <GL/glut.h>
+
+static void
+Reshape(int width, int height)
+{
+  glViewport(0, 0, (GLint) width, (GLint) height);
+
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
+  glMatrixMode(GL_MODELVIEW);
+  glShadeModel(GL_FLAT);
+}
+
+/* ARGSUSED1 */
+static void
+key_esc(unsigned char key, int x, int y)
+{
+  if(key == 27) exit(0);  /* Exit on Escape */
+}
+
+static GLubyte p25[] = {
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
+};
+
+static GLubyte p50[] = {
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
+};
+
+static GLubyte p75[] = {
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+  0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff,
+};
+
+static GLubyte *stippletab[4] = {NULL, p25, p50, p75};
+
+static void
+gamma_ramp(GLfloat yoffs, GLfloat r, GLfloat g, GLfloat b)
+{
+  GLint d;
+
+  glColor3f(0.0, 0.0, 0.0);     /* solid black, no stipple */
+  glRectf(-1.0, yoffs, -0.6, yoffs + 0.5);
+
+  for(d = 1; d < 4; d++) {  /* increasing density from 25% to 75% */
+    GLfloat xcoord = (-1.0 + d*0.4);
+    GLfloat t = d * 0.25;
+
+    glColor3f(r*t, g*t, b*t); /* draw outer rect */
+    glRectf(xcoord, yoffs, xcoord+0.4, yoffs + 0.5);
+
+    glColor3f(0.0, 0.0, 0.0);   /* "clear" inner rect */
+    glRectf(xcoord + 0.1, yoffs + 0.125, xcoord + 0.3, yoffs + 0.375);
+
+    glColor3f(r, g, b);         /* draw stippled inner rect */
+    glEnable(GL_POLYGON_STIPPLE);
+    glPolygonStipple(stippletab[d]);
+    glRectf(xcoord + 0.1, yoffs + 0.125, xcoord + 0.3, yoffs + 0.375);
+    glDisable(GL_POLYGON_STIPPLE);
+  }
+  glColor3f(r, g, b);           /* solid color, no stipple */
+  glRectf(0.6, yoffs, 1.0, yoffs + 0.5);
+}
+
+static void
+display(void)
+{
+  gamma_ramp( 0.5, 1.0, 1.0, 1.0); /* white ramp */
+  gamma_ramp( 0.0, 1.0, 0.0, 0.0); /* red ramp */
+  gamma_ramp(-0.5, 0.0, 1.0, 0.0); /* green ramp */
+  gamma_ramp(-1.0, 0.0, 0.0, 1.0); /* blue ramp */
+  glFlush();
+}
+
+int
+main(int argc, char **argv)
+{
+  glutInit(&argc, argv);
+  glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
+
+  glutInitWindowPosition(50, 50);
+  glutInitWindowSize(500, 400);
+
+  glutCreateWindow("gamma test patterns");
+  glutReshapeFunc(Reshape);
+  glutDisplayFunc(display);
+  glutKeyboardFunc(key_esc);
+
+  glutMainLoop();
+  return 0;             /* ANSI C requires main to return int. */
+}
diff --git a/progs/demos/gears.c b/progs/demos/gears.c
new file mode 100644
index 000000000..ab9bc0074
--- /dev/null
+++ b/progs/demos/gears.c
@@ -0,0 +1,381 @@
+/*
+ * 3-D gear wheels.  This program is in the public domain.
+ *
+ * Command line options:
+ *    -info      print GL implementation information
+ *    -exit      automatically exit after 30 seconds
+ *
+ *
+ * Brian Paul
+ */
+
+/* Conversion to GLUT by Mark J. Kilgard */
+
+
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <GL/glut.h>
+
+#ifndef M_PI
+#define M_PI 3.14159265
+#endif
+
+static GLint T0 = 0;
+static GLint Frames = 0;
+static GLint autoexit = 0;
+static GLint win = 0;
+
+
+/**
+
+  Draw a gear wheel.  You'll probably want to call this function when
+  building a display list since we do a lot of trig here.
+ 
+  Input:  inner_radius - radius of hole at center
+          outer_radius - radius at center of teeth
+          width - width of gear
+          teeth - number of teeth
+          tooth_depth - depth of tooth
+
+ **/
+
+static void
+gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
+  GLint teeth, GLfloat tooth_depth)
+{
+  GLint i;
+  GLfloat r0, r1, r2;
+  GLfloat angle, da;
+  GLfloat u, v, len;
+
+  r0 = inner_radius;
+  r1 = outer_radius - tooth_depth / 2.0;
+  r2 = outer_radius + tooth_depth / 2.0;
+
+  da = 2.0 * M_PI / teeth / 4.0;
+
+  glShadeModel(GL_FLAT);
+
+  glNormal3f(0.0, 0.0, 1.0);
+
+  /* draw front face */
+  glBegin(GL_QUAD_STRIP);
+  for (i = 0; i <= teeth; i++) {
+    angle = i * 2.0 * M_PI / teeth;
+    glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+    glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+    if (i < teeth) {
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
+    }
+  }
+  glEnd();
+
+  /* draw front sides of teeth */
+  glBegin(GL_QUADS);
+  da = 2.0 * M_PI / teeth / 4.0;
+  for (i = 0; i < teeth; i++) {
+    angle = i * 2.0 * M_PI / teeth;
+
+    glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+    glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
+    glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), width * 0.5);
+    glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
+  }
+  glEnd();
+
+  glNormal3f(0.0, 0.0, -1.0);
+
+  /* draw back face */
+  glBegin(GL_QUAD_STRIP);
+  for (i = 0; i <= teeth; i++) {
+    angle = i * 2.0 * M_PI / teeth;
+    glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+    glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+    if (i < teeth) {
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+    }
+  }
+  glEnd();
+
+  /* draw back sides of teeth */
+  glBegin(GL_QUADS);
+  da = 2.0 * M_PI / teeth / 4.0;
+  for (i = 0; i < teeth; i++) {
+    angle = i * 2.0 * M_PI / teeth;
+
+    glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
+    glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5);
+    glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
+    glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+  }
+  glEnd();
+
+  /* draw outward faces of teeth */
+  glBegin(GL_QUAD_STRIP);
+  for (i = 0; i < teeth; i++) {
+    angle = i * 2.0 * M_PI / teeth;
+
+    glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+    glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+    u = r2 * cos(angle + da) - r1 * cos(angle);
+    v = r2 * sin(angle + da) - r1 * sin(angle);
+    len = sqrt(u * u + v * v);
+    u /= len;
+    v /= len;
+    glNormal3f(v, -u, 0.0);
+    glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
+    glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
+    glNormal3f(cos(angle), sin(angle), 0.0);
+    glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), width * 0.5);
+    glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5);
+    u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
+    v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
+    glNormal3f(v, -u, 0.0);
+    glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
+    glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
+    glNormal3f(cos(angle), sin(angle), 0.0);
+  }
+
+  glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
+  glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
+
+  glEnd();
+
+  glShadeModel(GL_SMOOTH);
+
+  /* draw inside radius cylinder */
+  glBegin(GL_QUAD_STRIP);
+  for (i = 0; i <= teeth; i++) {
+    angle = i * 2.0 * M_PI / teeth;
+    glNormal3f(-cos(angle), -sin(angle), 0.0);
+    glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+    glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+  }
+  glEnd();
+
+}
+
+static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
+static GLint gear1, gear2, gear3;
+static GLfloat angle = 0.0;
+
+static void
+cleanup(void)
+{
+   glDeleteLists(gear1, 1);
+   glDeleteLists(gear2, 1);
+   glDeleteLists(gear3, 1);
+   glutDestroyWindow(win);
+}
+
+static void
+draw(void)
+{
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+  glPushMatrix();
+    glRotatef(view_rotx, 1.0, 0.0, 0.0);
+    glRotatef(view_roty, 0.0, 1.0, 0.0);
+    glRotatef(view_rotz, 0.0, 0.0, 1.0);
+
+    glPushMatrix();
+      glTranslatef(-3.0, -2.0, 0.0);
+      glRotatef(angle, 0.0, 0.0, 1.0);
+      glCallList(gear1);
+    glPopMatrix();
+
+    glPushMatrix();
+      glTranslatef(3.1, -2.0, 0.0);
+      glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
+      glCallList(gear2);
+    glPopMatrix();
+
+    glPushMatrix();
+      glTranslatef(-3.1, 4.2, 0.0);
+      glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
+      glCallList(gear3);
+    glPopMatrix();
+
+  glPopMatrix();
+
+  glutSwapBuffers();
+
+  Frames++;
+
+  {
+    GLint t = glutGet(GLUT_ELAPSED_TIME);
+    if (t - T0 >= 5000) {
+      GLfloat seconds = (t - T0) / 1000.0;
+      GLfloat fps = Frames / seconds;
+      printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps);
+      T0 = t;
+      Frames = 0;
+      if ((t >= 999.0 * autoexit) && (autoexit)) {
+        cleanup();
+        exit(0);
+      }
+    }
+  }
+}
+
+
+static void
+idle(void)
+{
+  static double t0 = -1.;
+  double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+  if (t0 < 0.0)
+    t0 = t;
+  dt = t - t0;
+  t0 = t;
+
+  angle += 70.0 * dt;  /* 70 degrees per second */
+  angle = fmod(angle, 360.0); /* prevents eventual overflow */
+
+  glutPostRedisplay();
+}
+
+/* change view angle, exit upon ESC */
+/* ARGSUSED1 */
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 'z':
+    view_rotz += 5.0;
+    break;
+  case 'Z':
+    view_rotz -= 5.0;
+    break;
+  case 27:  /* Escape */
+    cleanup();
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
+/* change view angle */
+/* ARGSUSED1 */
+static void
+special(int k, int x, int y)
+{
+  switch (k) {
+  case GLUT_KEY_UP:
+    view_rotx += 5.0;
+    break;
+  case GLUT_KEY_DOWN:
+    view_rotx -= 5.0;
+    break;
+  case GLUT_KEY_LEFT:
+    view_roty += 5.0;
+    break;
+  case GLUT_KEY_RIGHT:
+    view_roty -= 5.0;
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
+/* new window size or exposure */
+static void
+reshape(int width, int height)
+{
+  GLfloat h = (GLfloat) height / (GLfloat) width;
+
+  glViewport(0, 0, (GLint) width, (GLint) height);
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
+  glMatrixMode(GL_MODELVIEW);
+  glLoadIdentity();
+  glTranslatef(0.0, 0.0, -40.0);
+}
+
+static void
+init(int argc, char *argv[])
+{
+  static GLfloat pos[4] = {5.0, 5.0, 10.0, 0.0};
+  static GLfloat red[4] = {0.8, 0.1, 0.0, 1.0};
+  static GLfloat green[4] = {0.0, 0.8, 0.2, 1.0};
+  static GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0};
+  GLint i;
+
+  glLightfv(GL_LIGHT0, GL_POSITION, pos);
+  glEnable(GL_CULL_FACE);
+  glEnable(GL_LIGHTING);
+  glEnable(GL_LIGHT0);
+  glEnable(GL_DEPTH_TEST);
+
+  /* make the gears */
+  gear1 = glGenLists(1);
+  glNewList(gear1, GL_COMPILE);
+  glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
+  gear(1.0, 4.0, 1.0, 20, 0.7);
+  glEndList();
+
+  gear2 = glGenLists(1);
+  glNewList(gear2, GL_COMPILE);
+  glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
+  gear(0.5, 2.0, 2.0, 10, 0.7);
+  glEndList();
+
+  gear3 = glGenLists(1);
+  glNewList(gear3, GL_COMPILE);
+  glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
+  gear(1.3, 2.0, 0.5, 10, 0.7);
+  glEndList();
+
+  glEnable(GL_NORMALIZE);
+
+  for ( i=1; i<argc; i++ ) {
+    if (strcmp(argv[i], "-info")==0) {
+      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+    }
+    else if ( strcmp(argv[i], "-exit")==0) {
+      autoexit = 30;
+      printf("Auto Exit after %i seconds.\n", autoexit );
+    }
+  }
+}
+
+static void 
+visible(int vis)
+{
+  if (vis == GLUT_VISIBLE)
+    glutIdleFunc(idle);
+  else
+    glutIdleFunc(NULL);
+}
+
+int main(int argc, char *argv[])
+{
+  glutInit(&argc, argv);
+  glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
+
+  glutInitWindowPosition(0, 0);
+  glutInitWindowSize(300, 300);
+  win = glutCreateWindow("Gears");
+  init(argc, argv);
+
+  glutDisplayFunc(draw);
+  glutReshapeFunc(reshape);
+  glutKeyboardFunc(key);
+  glutSpecialFunc(special);
+  glutVisibilityFunc(visible);
+
+  glutMainLoop();
+  return 0;             /* ANSI C requires main to return int. */
+}
diff --git a/progs/demos/geartrain.c b/progs/demos/geartrain.c
new file mode 100644
index 000000000..3feb2a052
--- /dev/null
+++ b/progs/demos/geartrain.c
@@ -0,0 +1,1073 @@
+
+/*
+ * GearTrain Simulator * Version:  1.00
+ *
+ * Copyright (C) 1999  Shobhan Kumar Dutta  All Rights Reserved.
+ * <skdutta@del3.vsnl.net.in>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * SHOBHAN KUMAR DUTTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
+ * OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+
+#include <math.h>
+#include <stdlib.h>
+#include <GL/glut.h>
+#include <string.h>
+#include <stdio.h>
+
+#ifndef min
+#define min(x, y) ( x < y ? x : y )
+#endif
+
+#ifndef M_PI
+#define M_PI 3.14159265
+#endif	/*  */
+typedef GLfloat TDA[4];
+
+TDA background;
+
+
+struct AXLE
+  {
+    char name[20];
+      GLint id;
+      GLfloat radius;
+      GLint axis;
+      TDA color;
+      TDA position;
+      GLfloat length;
+      GLint motored;
+      GLfloat angular_velocity;
+      GLint direction;
+  };
+
+
+struct GEAR
+  {
+    char name[20];
+    char type[7];
+      GLint face;
+      GLint id;
+      GLfloat radius;
+      GLfloat width;
+      GLint teeth;
+      GLfloat tooth_depth;
+      GLfloat angle;
+      GLfloat angular_velocity;
+      TDA color;
+      GLint relative_position;
+      TDA position;
+    char axle_name[20];
+      GLint axis;
+      GLint direction;
+      GLint motored;
+  };
+
+
+struct BELT
+  {
+    char name[20];
+      GLint id;
+    char gear1_name[20];
+    char gear2_name[20];
+  };
+
+
+FILE * mainfile;
+struct GEAR g[10];
+struct AXLE a[10];
+struct BELT b[10];
+int number_of_gears;
+int number_of_axles;
+int number_of_belts;
+
+
+char Buf1[256], Buf2[256], Buf3[256], Buf4[256], Buf5[256];
+
+static GLint T0 = 0;
+static GLint Frames = 0;
+
+
+#ifndef _WIN32
+static void
+strset (char buf[], char ch)
+{
+    int i;
+    for (i = 0; i < strlen (buf); i++)
+      buf[i] = ch;
+}
+#endif
+
+
+static void
+Clear_Buffers ()
+{
+    strset (Buf1, 0);
+    strset (Buf2, 0);
+    strset (Buf3, 0);
+    strset (Buf4, 0);
+    strset (Buf5, 0);
+}
+
+
+static void
+LoadTriplet (TDA A)
+{
+    Clear_Buffers ();
+    fscanf (mainfile, "%s %s %s %s", Buf1, Buf2, Buf3, Buf4);
+    A[0] = atof (Buf2);
+    A[1] = atof (Buf3);
+    A[2] = atof (Buf4);
+}
+
+
+static void
+LoadReal (float *a)
+{
+    Clear_Buffers ();
+    fscanf (mainfile, "%s %s", Buf1, Buf2);
+    *a = atof (Buf2);
+}
+
+
+static void
+LoadInteger (int *a)
+{
+    Clear_Buffers ();
+    fscanf (mainfile, "%s %s", Buf1, Buf2);
+    *a = atoi (Buf2);
+}
+
+
+static void
+LoadText (char *a)
+{
+    Clear_Buffers ();
+    fscanf (mainfile, "%s %s", Buf1, Buf2);
+    strcpy (a, Buf2);
+}
+
+
+static void
+getdata (char filename[])
+{
+    int gear_count = 0, axle_count = 0, belt_count = 0, i;
+
+    mainfile = fopen (filename, "r");
+    if (!mainfile) {
+       printf("Error: couldn't open %s\n", filename);
+       exit(-1);
+    }
+
+    do
+    {
+	Clear_Buffers ();
+	fscanf (mainfile, "%s", Buf1);
+	if (ferror (mainfile))
+	{
+	    printf ("\nError opening file !\n");
+	    exit (1);
+	}
+
+	if (!(strcmp (Buf1, "BACKGROUND")))
+	  LoadTriplet (background);
+
+	if (!(strcmp (Buf1, "ANAME")))
+	{
+	    LoadText (a[axle_count].name);
+	    axle_count++;
+	}
+
+	if (!(strcmp (Buf1, "ARADIUS")))
+	  LoadReal (&a[axle_count - 1].radius);
+
+	if (!(strcmp (Buf1, "AAXIS")))
+	  LoadInteger (&a[axle_count - 1].axis);
+
+	if (!(strcmp (Buf1, "ACOLOR")))
+	  LoadTriplet (a[axle_count - 1].color);
+
+	if (!(strcmp (Buf1, "APOSITION")))
+	  LoadTriplet (a[axle_count - 1].position);
+
+	if (!(strcmp (Buf1, "ALENGTH")))
+	  LoadReal (&a[axle_count - 1].length);
+
+	if (!(strcmp (Buf1, "AMOTORED")))
+	  LoadInteger (&a[axle_count - 1].motored);
+
+	if (!(strcmp (Buf1, "AANGULARVELOCITY")))
+	  LoadReal (&a[axle_count - 1].angular_velocity);
+
+	if (!(strcmp (Buf1, "ADIRECTION")))
+	  LoadInteger (&a[axle_count - 1].direction);
+
+	if (!(strcmp (Buf1, "GNAME")))
+	{
+	    LoadText (g[gear_count].name);
+	    gear_count++;
+	}
+
+	if (!(strcmp (Buf1, "GTYPE")))
+	  LoadText (g[gear_count - 1].type);
+
+	if (!(strcmp (Buf1, "GFACE")))
+	  LoadInteger (&g[gear_count - 1].face);
+
+	if (!(strcmp (Buf1, "GRADIUS")))
+	  LoadReal (&g[gear_count - 1].radius);
+
+	if (!(strcmp (Buf1, "GWIDTH")))
+	  LoadReal (&g[gear_count - 1].width);
+
+	if (!(strcmp (Buf1, "GTEETH")))
+	  LoadInteger (&g[gear_count - 1].teeth);
+
+	if (!(strcmp (Buf1, "GTOOTHDEPTH")))
+	  LoadReal (&g[gear_count - 1].tooth_depth);
+
+	if (!(strcmp (Buf1, "GCOLOR")))
+	  LoadTriplet (g[gear_count - 1].color);
+
+	if (!(strcmp (Buf1, "GAXLE")))
+	  LoadText (g[gear_count - 1].axle_name);
+
+	if (!(strcmp (Buf1, "GPOSITION")))
+	  LoadInteger (&g[gear_count - 1].relative_position);
+
+	if (!(strcmp (Buf1, "BELTNAME")))
+	{
+	    LoadText (b[belt_count].name);
+	    belt_count++;
+	}
+
+	if (!(strcmp (Buf1, "GEAR1NAME")))
+	  LoadText (b[belt_count - 1].gear1_name);
+
+	if (!(strcmp (Buf1, "GEAR2NAME")))
+	  LoadText (b[belt_count - 1].gear2_name);
+    }
+
+    while (Buf1[0] != 0);
+
+    for (i = 0; i < number_of_gears; i++)
+    {
+	g[i].axis = -1;
+	g[i].direction = 0;
+	g[i].angular_velocity = 0.0;
+    }
+
+    number_of_gears = gear_count;
+    number_of_axles = axle_count;
+    number_of_belts = belt_count;
+    fclose (mainfile);
+}
+
+
+static void
+axle (GLint j, GLfloat radius, GLfloat length)
+{
+    GLfloat angle, rad, incr = 10.0 * M_PI / 180.0;
+
+    /* draw main cylinder */
+    glBegin (GL_QUADS);
+    for (angle = 0.0; angle < 360.0; angle += 5.0)
+    {
+	rad = angle * M_PI / 180.0;
+	glNormal3f (cos (rad), sin (rad), 0.0);
+	glVertex3f (radius * cos (rad), radius * sin (rad), length / 2);
+	glVertex3f (radius * cos (rad), radius * sin (rad), -length / 2);
+	glVertex3f (radius * cos (rad + incr), radius * sin (rad + incr), -length / 2);
+	glVertex3f (radius * cos (rad + incr), radius * sin (rad + incr), length / 2);
+    }
+    glEnd ();
+
+    /* draw front face */
+    glNormal3f (0.0, 0.0, 1.0);
+    glBegin (GL_TRIANGLES);
+    for (angle = 0.0; angle < 360.0; angle += 5.0)
+    {
+	rad = angle * M_PI / 180.0;
+	glVertex3f (0.0, 0.0, length / 2);
+      	glVertex3f (radius * cos (rad), radius * sin (rad), length / 2);
+	glVertex3f (radius * cos (rad + incr), radius * sin (rad + incr), length / 2);
+	glVertex3f (0.0, 0.0, length / 2);
+    }
+    glEnd ();
+
+    /* draw back face */
+    glNormal3f (0.0, 0.0, -1.0);
+    glBegin (GL_TRIANGLES);
+    for (angle = 0.0; angle <= 360.0; angle += 5.0)
+    {
+	rad = angle * M_PI / 180.0;
+	glVertex3f (0.0, 0.0, -length / 2);
+	glVertex3f (radius * cos (rad), radius * sin (rad), -length / 2);
+	glVertex3f (radius * cos (rad + incr), radius * sin (rad + incr), -length / 2);
+	glVertex3f (0.0, 0.0, -length / 2);
+    }
+    glEnd ();
+}
+
+
+
+static void
+gear (GLint j, char type[], GLfloat radius, GLfloat width,
+      GLint teeth, GLfloat tooth_depth)
+{
+    GLint i;
+    GLfloat r1, r2;
+    GLfloat angle, da;
+    GLfloat u, v, len, fraction = 0.5;
+    GLfloat n = 1.0;
+
+    r1 = radius - tooth_depth;
+    r2 = radius;
+
+    da = 2.0 * M_PI / teeth / 4.0;
+    if (!g[j].face)
+    {
+	fraction = -0.5;
+	n = -1.0;
+    }
+    if (!(strcmp (type, "NORMAL")))
+    {
+	fraction = 0.5;
+	n = 1.0;
+    }
+
+    /* draw front face */
+    if (!(strcmp (type, "NORMAL")))
+    {
+	glNormal3f (0.0, 0.0, 1.0 * n);
+	glBegin (GL_QUAD_STRIP);
+	for (i = 0; i <= teeth; i++)
+	{
+	    angle = i * 2.0 * M_PI / teeth;
+	    glVertex3f (0.0, 0.0, width * fraction);
+	    glVertex3f (r1 * cos (angle), r1 * sin (angle), width * fraction);
+	    glVertex3f (0.0, 0.0, width * fraction);
+	    glVertex3f (r1 * cos (angle + 3 * da), r1 * sin (angle + 3 * da), width * fraction);
+	}
+	glEnd ();
+    }
+    else
+    {
+	glNormal3f (0.0, 0.0, 1.0 * n);
+	glBegin (GL_QUAD_STRIP);
+	for (i = 0; i <= teeth; i++)
+	{
+	    angle = i * 2.0 * M_PI / teeth;
+	    glVertex3f (0.0, 0.0, width * fraction);
+	    glVertex3f ((r2 - width) * cos (angle), (r2 - width) * sin (angle), width * fraction);
+	    glVertex3f (0.0, 0.0, width * fraction);
+	    glVertex3f ((r2 - width) * cos (angle + 3 * da), (r2 - width) * sin (angle + 3 * da), width * fraction);
+	}
+	glEnd ();
+    }
+
+    /* draw front sides of teeth */
+    if (!(strcmp (type, "NORMAL")))
+    {
+	glNormal3f (0.0, 0.0, 1.0 * n);
+	glBegin (GL_QUADS);
+	da = 2.0 * M_PI / teeth / 4.0;
+	for (i = 0; i < teeth; i++)
+	{
+	    angle = i * 2.0 * M_PI / teeth;
+	    glVertex3f (r1 * cos (angle), r1 * sin (angle), width * fraction);
+	    glVertex3f (r2 * cos (angle + da), r2 * sin (angle + da), width * fraction);
+	    glVertex3f (r2 * cos (angle + 2 * da), r2 * sin (angle + 2 * da), width * fraction);
+	    glVertex3f (r1 * cos (angle + 3 * da), r1 * sin (angle + 3 * da), width * fraction);
+	}
+	glEnd ();
+    }
+
+    glNormal3f (0.0, 0.0, -1.0 * n);
+
+    /* draw back face */
+    glBegin (GL_QUAD_STRIP);
+    for (i = 0; i <= teeth; i++)
+    {
+	angle = i * 2.0 * M_PI / teeth;
+	glVertex3f (r1 * cos (angle), r1 * sin (angle), -width * fraction);
+	glVertex3f (0.0, 0.0, -width * fraction);
+	glVertex3f (r1 * cos (angle + 3 * da), r1 * sin (angle + 3 * da), -width * fraction);
+	glVertex3f (0.0, 0.0, -width * fraction);
+    }
+    glEnd ();
+
+    /* draw back sides of teeth */
+    glNormal3f (0.0, 0.0, -1.0 * n);
+    glBegin (GL_QUADS);
+    da = 2.0 * M_PI / teeth / 4.0;
+    for (i = 0; i < teeth; i++)
+    {
+	angle = i * 2.0 * M_PI / teeth;
+	glVertex3f (r1 * cos (angle + 3 * da), r1 * sin (angle + 3 * da), -width * fraction);
+	glVertex3f (r2 * cos (angle + 2 * da), r2 * sin (angle + 2 * da), -width * fraction);
+	glVertex3f (r2 * cos (angle + da), r2 * sin (angle + da), -width * fraction);
+	glVertex3f (r1 * cos (angle), r1 * sin (angle), -width * fraction);
+    }
+    glEnd ();
+
+
+    /* draw outward faces of teeth */
+    if (!(strcmp (type, "NORMAL")))
+    {
+	glBegin (GL_QUAD_STRIP);
+	for (i = 0; i < teeth; i++)
+	{
+	    angle = i * 2.0 * M_PI / teeth;
+
+	    glVertex3f (r1 * cos (angle), r1 * sin (angle), width * fraction);
+	    glVertex3f (r1 * cos (angle), r1 * sin (angle), -width * fraction);
+	    u = r2 * cos (angle + da) - r1 * cos (angle);
+	    v = r2 * sin (angle + da) - r1 * sin (angle);
+	    len = sqrt (u * u + v * v);
+	    u /= len;
+	    v /= len;
+	    glNormal3f (v, -u, 0.0);
+	    glVertex3f (r2 * cos (angle + da), r2 * sin (angle + da), width * fraction);
+	    glVertex3f (r2 * cos (angle + da), r2 * sin (angle + da), -width * fraction);
+	    glNormal3f (cos (angle), sin (angle), 0.0);
+	    glVertex3f (r2 * cos (angle + 2 * da), r2 * sin (angle + 2 * da), width * fraction);
+	    glVertex3f (r2 * cos (angle + 2 * da), r2 * sin (angle + 2 * da), -width * fraction);
+	    u = r1 * cos (angle + 3 * da) - r2 * cos (angle + 2 * da);
+	    v = r1 * sin (angle + 3 * da) - r2 * sin (angle + 2 * da);
+	    glNormal3f (v, -u, 0.0);
+	    glVertex3f (r1 * cos (angle + 3 * da), r1 * sin (angle + 3 * da), width * fraction);
+	    glVertex3f (r1 * cos (angle + 3 * da), r1 * sin (angle + 3 * da), -width * fraction);
+	    glNormal3f (cos (angle), sin (angle), 0.0);
+	}
+    }
+    else
+    {
+	glBegin (GL_QUAD_STRIP);
+	for (i = 0; i < teeth; i++)
+	{
+	    angle = i * 2.0 * M_PI / teeth;
+	    glVertex3f (r1 * cos (angle), r1 * sin (angle), width * fraction);
+	    glVertex3f (r1 * cos (angle), r1 * sin (angle), -width * fraction);
+	    u = r2 * cos (angle + da) - r1 * cos (angle);
+	    v = r2 * sin (angle + da) - r1 * sin (angle);
+	    len = sqrt (u * u + v * v);
+	    u /= len;
+	    v /= len;
+	    glNormal3f (v, -u, 0.0);
+	    glVertex3f ((r2 - width) * cos (angle + da), (r2 - width) * sin (angle + da), width * fraction);
+	    glVertex3f (r2 * cos (angle + da), r2 * sin (angle + da), -width * fraction);
+	    glNormal3f (cos (angle), sin (angle), n);
+	    glVertex3f ((r2 - width) * cos (angle + 2 * da), (r2 - width) * sin (angle + 2 * da), width * fraction);
+	    glVertex3f (r2 * cos (angle + 2 * da), r2 * sin (angle + 2 * da), -width * fraction);
+	    u = r1 * cos (angle + 3 * da) - r2 * cos (angle + 2 * da);
+	    v = r1 * sin (angle + 3 * da) - r2 * sin (angle + 2 * da);
+	    glNormal3f (v, -u, 0.0);
+	    glVertex3f (r1 * cos (angle + 3 * da), r1 * sin (angle + 3 * da), width * fraction);
+	    glVertex3f (r1 * cos (angle + 3 * da), r1 * sin (angle + 3 * da), -width * fraction);
+	    glNormal3f (cos (angle), sin (angle), n);
+	}
+    }
+
+    glVertex3f (r1 * cos (0), r1 * sin (0), width * fraction);
+    glVertex3f (r1 * cos (0), r1 * sin (0), -width * fraction);
+    glEnd ();
+}
+
+
+static void
+belt (struct GEAR g1, struct GEAR g2)
+{
+    GLfloat D, alpha, phi, angle, incr, width;
+    GLint indexes[3] =
+    {
+       0, 0, 0
+    };
+
+    GLfloat col[3] =
+    {
+       0.0, 0.0, 0.0
+    };
+
+    width = min (g1.width, g2.width);
+    D = sqrt (pow (g1.position[0] - g2.position[0], 2) + pow (g1.position[1] - g2.position[1], 2) + pow (g1.position[2] - g2.position[2], 2));
+    alpha = acos ((g2.position[0] - g1.position[0]) / D);
+    phi = acos ((g1.radius - g2.radius) / D);
+    glBegin (GL_QUADS);
+    glColor3fv (col);
+    glMaterialiv (GL_FRONT, GL_COLOR_INDEXES, indexes);
+    incr = 1.2 * 360.0 / g1.teeth * M_PI / 180.00;
+    for (angle = alpha + phi; angle <= 2 * M_PI - phi + alpha; angle += 360.0 / g1.teeth * M_PI / 180.00)
+    {
+	glNormal3f (cos (angle), sin (angle), 0.0);
+	glVertex3f (g1.radius * cos (angle), g1.radius * sin (angle), width * 0.5);
+	glVertex3f (g1.radius * cos (angle), g1.radius * sin (angle), -width * 0.5);
+	glVertex3f (g1.radius * cos (angle + incr), g1.radius * sin (angle + incr), -width * 0.5);
+	glVertex3f (g1.radius * cos (angle + incr), g1.radius * sin (angle + incr), width * 0.5);
+    }
+    glEnd ();
+    glBegin (GL_QUADS);
+    glColor3fv (col);
+    glMaterialiv (GL_FRONT, GL_COLOR_INDEXES, indexes);
+    incr = 1.2 * 360.0 / g2.teeth * M_PI / 180.00;
+    for (angle = -phi + alpha; angle <= phi + alpha; angle += 360.0 / g1.teeth * M_PI / 180.0)
+    {
+	glNormal3f (cos (angle), sin (angle), 0.0);
+	glVertex3f (g2.radius * cos (angle) + g2.position[0] - g1.position[0], g2.radius * sin (angle) + g2.position[1] - g1.position[1], width * 0.5);
+	glVertex3f (g2.radius * cos (angle) + g2.position[0] - g1.position[0], g2.radius * sin (angle) + g2.position[1] - g1.position[1], width * -0.5);
+	glVertex3f (g2.radius * cos (angle + incr) + g2.position[0] - g1.position[0], g2.radius * sin (angle + incr) + g2.position[1] - g1.position[1], width * -0.5);
+	glVertex3f (g2.radius * cos (angle + incr) + g2.position[0] - g1.position[0], g2.radius * sin (angle + incr) + g2.position[1] - g1.position[1], width * 0.5);
+    }
+    glEnd ();
+
+    glBegin (GL_QUADS);
+    glColor3fv (col);
+    glMaterialiv (GL_FRONT, GL_COLOR_INDEXES, indexes);
+    glVertex3f (g1.radius * cos (alpha + phi), g1.radius * sin (alpha + phi), width * 0.5);
+    glVertex3f (g1.radius * cos (alpha + phi), g1.radius * sin (alpha + phi), width * -0.5);
+    glVertex3f (g2.radius * cos (alpha + phi) + g2.position[0] - g1.position[0], g2.radius * sin (alpha + phi) + g2.position[1] - g1.position[1], width * -0.5);
+    glVertex3f (g2.radius * cos (alpha + phi) + g2.position[0] - g1.position[0], g2.radius * sin (alpha + phi) + g2.position[1] - g1.position[1], width * 0.5);
+    glVertex3f (g1.radius * cos (alpha - phi), g1.radius * sin (alpha - phi), width * 0.5);
+    glVertex3f (g1.radius * cos (alpha - phi), g1.radius * sin (alpha - phi), width * -0.5);
+    glVertex3f (g2.radius * cos (alpha - phi) + g2.position[0] - g1.position[0], g2.radius * sin (alpha - phi) + g2.position[1] - g1.position[1], width * -0.5);
+    glVertex3f (g2.radius * cos (alpha - phi) + g2.position[0] - g1.position[0], g2.radius * sin (alpha - phi) + g2.position[1] - g1.position[1], width * 0.5);
+    glEnd ();
+}
+
+
+static int
+axle_find (char axle_name[])
+{
+    int i;
+
+    for (i = 0; i < number_of_axles; i++)
+    {
+	if (!(strcmp (axle_name, a[i].name)))
+           break;
+    }
+    return i;
+}
+
+
+static int
+gear_find (char gear_name[])
+{
+    int i;
+
+    for (i = 0; i < number_of_gears; i++)
+    {
+	if (!(strcmp (gear_name, g[i].name)))
+           break;
+    }
+    return i;
+}
+
+
+static void
+process ()
+{
+    GLfloat x, y, z, D, dist;
+    GLint axle_index, i, j, g1, g2, k;
+    char error[80];
+
+    for (i = 0; i < number_of_gears; i++)
+    {
+	x = 0.0;
+	y = 0.0;
+	z = 0.0;
+	axle_index = axle_find (g[i].axle_name);
+	g[i].axis = a[axle_index].axis;
+	g[i].motored = a[axle_index].motored;
+	if (a[axle_index].motored)
+	{
+	    g[i].direction = a[axle_index].direction;
+	    g[i].angular_velocity = a[axle_index].angular_velocity;
+	}
+	if (g[i].axis == 0)
+           x = 1.0;
+        else if (g[i].axis == 1)
+           y = 1.0;
+        else
+           z = 1.0;
+
+	g[i].position[0] = a[axle_index].position[0] + x * g[i].relative_position;
+	g[i].position[1] = a[axle_index].position[1] + y * g[i].relative_position;
+	g[i].position[2] = a[axle_index].position[2] + z * g[i].relative_position;
+    }
+
+    for (k = 0; k < number_of_axles; k++)
+    {
+	for (i = 0; i < number_of_gears - 1; i++)
+	{
+	    for (j = 0; j < number_of_gears; j++)
+	    {
+		if (!(strcmp (g[i].type, g[j].type)) && (!(strcmp (g[i].type, "NORMAL"))) && ((strcmp (g[i].axle_name, g[j].axle_name) != 0)) && (g[i].axis == g[j].axis))
+		{
+		    D = sqrt (pow (g[i].position[0] - g[j].position[0], 2) + pow (g[i].position[1] - g[j].position[1], 2) + pow (g[i].position[2] - g[j].position[2], 2));
+		    if (D < 1.1 * (g[i].radius - g[i].tooth_depth + g[j].radius - g[j].tooth_depth))
+		    {
+			printf (error, "Gear %s and %s are too close to each other.", g[i].name, g[j].name);
+
+                        /*MessageBox(NULL,error,windowName,MB_ICONEXCLAMATION|MB_OK);*/
+			exit (1);
+		    }
+
+		    if (g[i].axis == 0)
+		    {
+			dist = g[i].position[0] - g[j].position[0];
+		    }
+		    else if (g[i].axis == 1)
+		    {
+			dist = g[i].position[1] - g[j].position[1];
+		    }
+		    else
+                       dist = g[i].position[2] - g[j].position[2];
+
+		    dist = fabs (dist);
+
+		    if (dist < (g[i].width / 2 + g[j].width / 2))
+		    {
+			if ((g[i].motored) && (!(g[j].motored)) && (D < 0.95 * (g[i].radius + g[j].radius)))
+			{
+			    axle_index = axle_find (g[j].axle_name);
+			    if ((a[axle_index].direction != 0) && (g[j].angular_velocity != g[i].angular_velocity * g[i].teeth / g[j].teeth * g[i].radius / g[j].radius))
+			    {
+				printf (error, "Error in tooth linkage of gears %s and %s.", g[i].name, g[j].name);
+                                /*MessageBox(NULL,error,windowName,MB_ICONEXCLAMATION|MB_OK);*/
+				exit (1);
+			    }
+
+			    g[j].motored = (a[axle_index].motored = 1);
+			    g[j].direction = (a[axle_index].direction = -g[i].direction);
+			    a[axle_index].angular_velocity = g[i].angular_velocity * g[i].teeth / g[j].teeth;
+			    g[j].angular_velocity = (a[axle_index].angular_velocity *= g[i].radius / g[j].radius);
+			}
+
+			if ((!(g[i].motored)) && (g[j].motored) && (D < 0.95 * (g[i].radius + g[j].radius)))
+			{
+			    axle_index = axle_find (g[i].axle_name);
+			    if ((a[axle_index].direction != 0) && (g[i].angular_velocity != g[j].angular_velocity * g[j].teeth / g[i].teeth * g[j].radius / g[i].radius))
+			    {
+				printf (error, "Error in tooth linkage of gears %s and %s.", g[i].name, g[j].name);
+                                /*MessageBox(NULL,error,windowName,MB_ICONEXCLAMATION|MB_OK);*/
+				exit (1);
+			    }
+
+			    g[i].motored = (a[axle_index].motored = 1);
+			    g[i].direction = (a[axle_index].direction = -g[j].direction);
+			    a[axle_index].angular_velocity = g[j].angular_velocity * g[j].teeth / g[i].teeth;
+			    g[i].angular_velocity = (a[axle_index].angular_velocity *= g[j].radius / g[i].radius);
+
+			}
+		    }
+		}
+
+		if (!(strcmp (g[i].type, g[j].type)) && (!(strcmp (g[i].type, "BEVEL"))) && ((strcmp (g[i].axle_name, g[j].axle_name) != 0)) && (g[i].axis != g[j].axis))
+		{
+		    D = sqrt (pow (g[i].position[0] - g[j].position[0], 2) + pow (g[i].position[1] - g[j].position[1], 2) + pow (g[i].position[2] - g[j].position[2], 2));
+		    if ((g[i].motored) && (!(g[j].motored)) && (D < 0.95 * sqrt (g[i].radius * g[i].radius + g[j].radius * g[j].radius)))
+		    {
+			axle_index = axle_find (g[j].axle_name);
+			if ((a[axle_index].direction != 0) && (g[j].angular_velocity != g[i].angular_velocity * g[i].teeth / g[j].teeth * g[i].radius / g[j].radius))
+			{
+			    printf (error, "Error in tooth linkage of gears %s and %s.", g[i].name, g[j].name);
+                            /*MessageBox(NULL,error,windowName,MB_ICONEXCLAMATION|MB_OK);*/
+			    exit (1);
+			}
+			g[j].motored = (a[axle_index].motored = 1);
+			g[j].direction = (a[axle_index].direction = -g[i].direction);
+			a[axle_index].angular_velocity = g[i].angular_velocity * g[i].teeth / g[j].teeth;
+			g[j].angular_velocity = (a[axle_index].angular_velocity *= g[i].radius / g[j].radius);
+		    }
+
+
+		    if ((!(g[i].motored)) && (g[j].motored) && (D < 0.95 * sqrt (g[i].radius * g[i].radius + g[j].radius * g[j].radius)))
+		    {
+			axle_index = axle_find (g[i].axle_name);
+			if ((a[axle_index].direction != 0) && (g[i].angular_velocity != g[j].angular_velocity * g[j].teeth / g[i].teeth * g[j].radius / g[i].radius))
+			{
+			    printf (error, "Error in tooth linkage of gears %s and %s.", g[i].name, g[j].name);
+                            /*MessageBox(NULL,error,windowName,MB_ICONEXCLAMATION|MB_OK);*/
+			    exit (1);
+			}
+			g[i].motored = (a[axle_index].motored = 1);
+			g[i].direction = (a[axle_index].direction = -g[j].direction);
+			a[axle_index].angular_velocity = g[j].angular_velocity * g[j].teeth / g[i].teeth;
+			g[i].angular_velocity = (a[axle_index].angular_velocity *= g[j].radius / g[i].radius);
+		    }
+		}
+	    }
+	}
+
+	for (i = 0; i < number_of_gears; i++)
+	{
+	    axle_index = axle_find (g[i].axle_name);
+	    g[i].motored = a[axle_index].motored;
+	    if (a[axle_index].motored)
+	    {
+		g[i].direction = a[axle_index].direction;
+		g[i].angular_velocity = a[axle_index].angular_velocity;
+	    }
+	}
+
+	for (i = 0; i < number_of_belts; i++)
+	{
+	    g1 = gear_find (b[i].gear1_name);
+	    g2 = gear_find (b[i].gear2_name);
+	    D = sqrt (pow (g[g1].position[0] - g[g2].position[0], 2) + pow (g[g1].position[1] - g[g2].position[1], 2) + pow (g[g1].position[2] - g[g2].position[2], 2));
+	    if (!((g[g1].axis == g[g2].axis) && (!strcmp (g[g1].type, g[g2].type)) && (!strcmp (g[g1].type, "NORMAL"))))
+	    {
+		printf (error, "Belt %s invalid.", b[i].name);
+                /*MessageBox(NULL,error,windowName,MB_ICONEXCLAMATION|MB_OK);*/
+		exit (1);
+	    }
+
+	    if ((g[g1].axis == g[g2].axis) && (!strcmp (g[g1].type, g[g2].type)) && (!strcmp (g[g1].type, "NORMAL")))
+	    {
+	      /*
+	         if((g[g1].motored)&&(g[g2].motored))
+	         if(g[g2].angular_velocity!=(g[g1].angular_velocity*g[g1].radius/g[g2].radius))
+	         {
+	         printf(error,"Error in belt linkage of gears %s and %s".,g[g1].name,g[g2].name);
+	         MessageBox(NULL,error,windowName,MB_ICONEXCLAMATION|MB_OK);
+	         exit(1);
+	         }
+              */
+               if (g[g1].axis == 0)
+                  {
+		    dist = g[g1].position[0] - g[g2].position[0];
+		}
+		else if (g[i].axis == 1)
+		{
+		    dist = g[g1].position[1] - g[g2].position[1];
+		}
+		else
+                   dist = g[g1].position[2] - g[g2].position[2];
+
+		dist = fabs (dist);
+
+		if (dist > (g[g1].width / 2 + g[g2].width / 2))
+		{
+		    printf (error, "Belt %s invalid.", b[i].name);
+                    /*MessageBox(NULL,error,windowName,MB_ICONEXCLAMATION|MB_OK);*/
+		    exit (1);
+		}
+
+		if (dist < (g[g1].width / 2 + g[g2].width / 2))
+		{
+		    if (D < g[g1].radius + g[g2].radius)
+		    {
+			printf (error, "Gears %s and %s too close to be linked with belts", g[g1].name, g[g2].name);
+                        /*MessageBox(NULL,error,windowName,MB_ICONEXCLAMATION|MB_OK);*/
+			exit (1);
+		    }
+
+		    if ((g[g1].motored) && (!(g[g2].motored)))
+		    {
+			axle_index = axle_find (g[g2].axle_name);
+			g[g2].motored = (a[axle_index].motored = 1);
+			g[g2].direction = (a[axle_index].direction = g[g1].direction);
+			g[g2].angular_velocity = (a[axle_index].angular_velocity = g[g1].angular_velocity * g[g1].radius / g[g2].radius);
+		    }
+
+		    if ((!(g[g1].motored)) && (g[g2].motored))
+		    {
+			axle_index = axle_find (g[g1].axle_name);
+			g[g1].motored = (a[axle_index].motored = 1);
+			g[g1].direction = (a[axle_index].direction = g[g2].direction);
+			g[g1].angular_velocity = (a[axle_index].angular_velocity = g[g2].angular_velocity * g[g2].radius / g[g1].radius);
+		    }
+		}
+	    }
+	}
+
+	for (i = 0; i < number_of_gears; i++)
+	{
+	    axle_index = axle_find (g[i].axle_name);
+	    g[i].motored = a[axle_index].motored;
+	    if (a[axle_index].motored)
+	    {
+		g[i].direction = a[axle_index].direction;
+		g[i].angular_velocity = a[axle_index].angular_velocity;
+	    }
+	}
+    }
+}
+
+
+
+GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 10.0;
+
+
+static void
+draw (void)
+{
+    int i;
+    GLfloat x, y, z;
+    int index;
+
+    glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    glPushMatrix ();
+    glRotatef (view_rotx, 1.0, 0.0, 0.0);
+    glRotatef (view_roty, 0.0, 1.0, 0.0);
+    glRotatef (view_rotz, 0.0, 0.0, 1.0);
+
+    for (i = 0; i < number_of_gears; i++)
+    {
+	x = 0.0;
+	y = 0.0;
+	z = 0.0;
+	glPushMatrix ();
+/*glTranslatef( -3.0, -2.0, 0.0 );*/
+	glTranslatef (g[i].position[0], g[i].position[1], g[i].position[2]);
+	if (g[i].axis == 0)
+           y = 1.0;
+        else if (g[i].axis == 1)
+           x = 1.0;
+        else
+           z = 1.0;
+
+	if (z != 1.0)
+           glRotatef (90.0, x, y, z);
+
+	glRotatef (g[i].direction * g[i].angle, 0.0, 0.0, 1.0);
+	glCallList (g[i].id);
+	glPopMatrix ();
+    }
+
+    for (i = 0; i < number_of_axles; i++)
+    {
+	x = 0.0;
+	y = 0.0;
+	z = 0.0;
+	glPushMatrix ();
+	glTranslatef (a[i].position[0], a[i].position[1], a[i].position[2]);
+	if (a[i].axis == 0)
+           y = 1.0;
+        else if (a[i].axis == 1)
+           x = 1.0;
+        else
+           z = 1.0;
+
+	if (z != 1.0)
+           glRotatef (90.0, x, y, z);
+
+	glCallList (a[i].id);
+	glPopMatrix ();
+    }
+
+    for (i = 0; i < number_of_belts; i++)
+    {
+	x = 0.0;
+	y = 0.0;
+	z = 0.0;
+	glPushMatrix ();
+	index = gear_find (b[i].gear1_name);
+	glTranslatef (g[index].position[0], g[index].position[1], g[index].position[2]);
+	if (g[index].axis == 0)
+           y = 1.0;
+        else if (g[index].axis == 1)
+           x = 1.0;
+        else
+           z = 1.0;
+
+	if (z != 1.0)
+           glRotatef (90.0, x, y, z);
+
+	glCallList (b[i].id);
+	glPopMatrix ();
+    }
+
+    glPopMatrix ();
+    glutSwapBuffers ();
+
+    {
+	GLint t = glutGet(GLUT_ELAPSED_TIME);
+	Frames++;
+	if (t - T0 >= 5000) {
+	    GLfloat seconds = (t - T0) / 1000.0;
+	    GLfloat fps = Frames / seconds;
+	    printf("%d frames in %g seconds = %g FPS\n", Frames, seconds, fps);
+	    T0 = t;
+	    Frames = 0;
+	}
+    }
+}
+
+
+static void
+idle (void)
+{
+    int i;
+    static double t0 = -1.;
+    double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+    if (t0 < 0.0)
+       t0 = t;
+    dt = t - t0;
+    t0 = t;
+    for (i = 0; i < number_of_gears; i++)
+      g[i].angle += g[i].angular_velocity * dt;
+    glutPostRedisplay();
+}
+
+
+
+
+/* change view angle, exit upon ESC */
+static void
+key (unsigned char k, int x, int y)
+{
+    switch (k)
+    {
+    case 'x':
+	view_rotx += 5.0;
+        break;
+    case 'X':
+	view_rotx -= 5.0;
+        break;
+    case 'y':
+	view_roty += 5.0;
+        break;
+    case 'Y':
+	view_roty -= 5.0;
+        break;
+    case 'z':
+	view_rotz += 5.0;
+        break;
+    case 'Z':
+	view_rotz -= 5.0;
+        break;
+    case 0x1B:
+	exit(0);
+    }
+}
+
+
+
+
+/* new window size or exposure */
+static void
+reshape (int width, int height)
+{
+    glViewport (0, 0, (GLint) width, (GLint) height);
+    glMatrixMode (GL_PROJECTION);
+    glLoadIdentity ();
+    if (width > height)
+    {
+	GLfloat w = (GLfloat) width / (GLfloat) height;
+	glFrustum (-w, w, -1.0, 1.0, 5.0, 60.0);
+    }
+    else
+    {
+	GLfloat h = (GLfloat) height / (GLfloat) width;
+	glFrustum (-1.0, 1.0, -h, h, 5.0, 60.0);
+    }
+
+    glMatrixMode (GL_MODELVIEW);
+    glLoadIdentity ();
+    glTranslatef (0.0, 0.0, -40.0);
+    glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+
+
+
+static void
+init (void)
+{
+    GLfloat matShine = 20.00F;
+    GLfloat light0Pos[4] =
+    {
+       0.70F, 0.70F, 1.25F, 0.50F
+    };
+    int i;
+
+    glClearColor (background[0], background[1], background[2], 1.0F);
+    glClearIndex ((GLfloat) 0.0);
+
+    glMaterialf (GL_FRONT_AND_BACK, GL_SHININESS, matShine);
+    glLightfv (GL_LIGHT0, GL_POSITION, light0Pos);
+    glEnable (GL_LIGHT0);
+
+    glEnable (GL_LIGHTING);
+    glEnable (GL_DEPTH_TEST);
+    for (i = 0; i < number_of_gears; i++)
+      g[i].angle = 0.0;
+
+    for (i = 0; i < number_of_gears; i++)
+    {
+	g[i].id = glGenLists (1);
+	glNewList (g[i].id, GL_COMPILE);
+	glColor3fv (g[i].color);
+	glMaterialfv (GL_FRONT, GL_SPECULAR, g[i].color);
+	gear (i, g[i].type, g[i].radius, g[i].width, g[i].teeth, g[i].tooth_depth);
+	glEndList ();
+    }
+
+    for (i = 0; i < number_of_axles; i++)
+    {
+	a[i].id = glGenLists (1);
+	glNewList (a[i].id, GL_COMPILE);
+	glColor3fv (a[i].color);
+	glMaterialfv (GL_FRONT, GL_SPECULAR, a[i].color);
+	axle (i, a[i].radius, a[i].length);
+	glEndList ();
+    }
+
+    for (i = 0; i < number_of_belts; i++)
+    {
+	b[i].id = glGenLists (1);
+	glNewList (b[i].id, GL_COMPILE);
+	belt (g[gear_find (b[i].gear1_name)], g[gear_find (b[i].gear2_name)]);
+	glEndList ();
+    }
+
+    glEnable (GL_COLOR_MATERIAL);
+}
+
+
+
+int
+main (int argc, char *argv[])
+{
+    char *file;
+
+    if (argc < 2)
+       file = "geartrain.dat";
+    else
+       file = argv[1];
+
+    glutInitWindowPosition (0, 0);
+    glutInitWindowSize(640,480);
+    glutInitDisplayMode (GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
+
+    if (glutCreateWindow ("Gear Train Simulation") == GL_FALSE)
+      exit (1);
+
+    getdata (file);
+    process ();
+    init ();
+
+    glutDisplayFunc (draw);
+    glutReshapeFunc (reshape);
+    glutKeyboardFunc (key);
+    glutIdleFunc (idle);
+    glutMainLoop ();
+    return 0;
+}
diff --git a/progs/demos/geartrain.dat b/progs/demos/geartrain.dat
new file mode 100644
index 000000000..374de48bd
--- /dev/null
+++ b/progs/demos/geartrain.dat
@@ -0,0 +1,119 @@
+BACKGROUND = 0.000 0.500 0.700

+

+ANAME = AXLE1

+ARADIUS = 1.000

+AAXIS = 2

+APOSITION = -7.000 0.000 0.000

+ACOLOR = 0.800 0.500 0.200

+ALENGTH = 6.000

+AMOTORED = 1

+AANGULARVELOCITY = 90.000

+ADIRECTION = 1

+

+ANAME = AXLE2

+ARADIUS = 1.000

+AAXIS = 2

+APOSITION = -3.000 0.000 0.000

+ACOLOR = 0.800 0.500 0.200

+ALENGTH = 12.000

+AMOTORED = 0

+

+ANAME = AXLE3

+ARADIUS = 1.000

+AAXIS = 2

+APOSITION = 1.000 0.000 0.000

+ACOLOR = 0.800 0.500 0.200

+ALENGTH = 6.000

+AMOTORED = 0

+

+ANAME = AXLE4

+ARADIUS = 1.000

+AAXIS = 2

+APOSITION = 8.000 0.000 0.000

+ACOLOR = 0.800 0.500 0.200

+ALENGTH = 18.000

+AMOTORED = 0

+

+ANAME = AXLE5

+ARADIUS = 1.000

+AAXIS = 1

+APOSITION = 8.000 -8.200 -7.400

+ACOLOR = 0.800 0.500 0.200

+ALENGTH = 12.000

+AMOTORED = 0

+

+GNAME = GEAR1

+GTYPE = NORMAL

+GRADIUS = 2.200

+GWIDTH = 3.000

+GTEETH = 40

+GTOOTHDEPTH = 0.500

+GCOLOR = 0.500 0.500 0.500

+GAXLE = AXLE1

+GPOSITION = 0.000

+

+GNAME = GEAR2

+GTYPE = NORMAL

+GRADIUS = 2.200

+GWIDTH = 3.000

+GTEETH = 30

+GTOOTHDEPTH = 0.500

+GCOLOR = 0.500 0.500 0.500

+GAXLE = AXLE2

+GPOSITION = 0.000

+

+GNAME = GEAR3

+GTYPE = NORMAL

+GRADIUS = 2.200

+GWIDTH = 3.000

+GTEETH = 20

+GTOOTHDEPTH = 0.500

+GCOLOR = 0.500 0.500 0.500

+GAXLE = AXLE3

+GPOSITION = 0.000

+

+GNAME = GEAR4

+GTYPE = NORMAL

+GRADIUS = 1.700

+GWIDTH = 1.000

+GTEETH = 20

+GTOOTHDEPTH = 0.500

+GCOLOR = 0.500 0.500 0.500

+GAXLE = AXLE2

+GPOSITION = 5.000

+

+GNAME = GEAR5

+GTYPE = NORMAL

+GRADIUS = 3.000

+GWIDTH = 1.000

+GTEETH = 20

+GTOOTHDEPTH = 0.500

+GCOLOR = 0.500 0.500 0.500

+GAXLE = AXLE4

+GPOSITION = 5.000

+

+GNAME = GEAR6

+GTYPE = BEVEL

+GFACE = 0

+GRADIUS = 4.000

+GWIDTH = 1.000

+GTEETH = 20

+GTOOTHDEPTH = 1.700

+GCOLOR = 0.500 0.500 0.500

+GAXLE = AXLE4

+GPOSITION = -4.000

+

+GNAME = GEAR7

+GTYPE = BEVEL

+GFACE = 0

+GRADIUS = 4.000

+GWIDTH = 1.000

+GTEETH = 20

+GTOOTHDEPTH = 1.700

+GCOLOR = 0.500 0.500 0.500

+GAXLE = AXLE5

+GPOSITION = 5.000

+

+BELTNAME = BELT1

+GEAR1NAME = GEAR5

+GEAR2NAME = GEAR4

diff --git a/progs/demos/glinfo.c b/progs/demos/glinfo.c
new file mode 100644
index 000000000..a6a747828
--- /dev/null
+++ b/progs/demos/glinfo.c
@@ -0,0 +1,32 @@
+
+/*
+ * Print GL, GLU and GLUT version and extension info
+ *
+ * Brian Paul  This file in public domain.
+ * October 3, 1997
+ */
+
+
+#include <stdio.h>
+#include <GL/glut.h>
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitDisplayMode( GLUT_RGB );
+   glutCreateWindow(argv[0]);
+
+   printf("GL_VERSION: %s\n", (char *) glGetString(GL_VERSION));
+   printf("GL_EXTENSIONS: %s\n", (char *) glGetString(GL_EXTENSIONS));
+   printf("GL_RENDERER: %s\n", (char *) glGetString(GL_RENDERER));
+   printf("GL_VENDOR: %s\n", (char *) glGetString(GL_VENDOR));
+   printf("GLU_VERSION: %s\n", (char *) gluGetString(GLU_VERSION));
+   printf("GLU_EXTENSIONS: %s\n", (char *) gluGetString(GLU_EXTENSIONS));
+   printf("GLUT_API_VERSION: %d\n", GLUT_API_VERSION);
+#ifdef GLUT_XLIB_IMPLEMENTATION
+   printf("GLUT_XLIB_IMPLEMENTATION: %d\n", GLUT_XLIB_IMPLEMENTATION);
+#endif
+
+   return 0;
+}
diff --git a/progs/demos/gloss.c b/progs/demos/gloss.c
new file mode 100644
index 000000000..4e7adc8d4
--- /dev/null
+++ b/progs/demos/gloss.c
@@ -0,0 +1,435 @@
+
+/*
+ * Specular reflection demo.  The specular highlight is modulated by
+ * a sphere-mapped texture.  The result is a high-gloss surface.
+ * NOTE: you really need hardware acceleration for this.
+ * Also note, this technique can't be implemented with multi-texture
+ * and separate specular color interpolation because there's no way
+ * to indicate that the second texture unit (the reflection map)
+ * should modulate the specular color and not the base color.
+ * A future multi-texture extension could fix that.
+ *
+ * Command line options:
+ *    -info      print GL implementation information
+ *
+ *
+ * Brian Paul  October 22, 1999  This program is in the public domain.
+ */
+
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <GL/glut.h>
+
+#include "readtex.h"
+
+#define SPECULAR_TEXTURE_FILE "../images/reflect.rgb"
+#define BASE_TEXTURE_FILE "../images/tile.rgb"
+
+/* Menu items */
+#define DO_SPEC_TEXTURE 1
+#define OBJECT 2
+#define ANIMATE 3
+#define QUIT 100
+
+/* for convolution */
+#define FILTER_SIZE 7
+
+static GLuint CylinderObj = 0;
+static GLuint TeapotObj = 0;
+static GLuint Object = 0;
+static GLboolean Animate = GL_TRUE;
+
+static GLfloat Xrot = 0.0, Yrot = 0.0, Zrot = 0.0;
+static GLfloat DXrot = 20.0, DYrot = 50.;
+
+static GLfloat Black[4] = { 0, 0, 0, 0 };
+static GLfloat White[4] = { 1, 1, 1, 1 };
+static GLfloat Diffuse[4] = { .3, .3, 1.0, 1.0 };  /* blue */
+static GLfloat Shininess = 6;
+
+static GLuint BaseTexture, SpecularTexture;
+static GLboolean DoSpecTexture = GL_TRUE;
+
+/* performance info */
+static GLint T0 = 0;
+static GLint Frames = 0;
+
+
+static void Idle( void )
+{
+   static double t0 = -1.;
+   double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+
+   if (Animate) {
+      Xrot += DXrot*dt;
+      Yrot += DYrot*dt;
+      glutPostRedisplay();
+   }
+}
+
+
+static void Display( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glPushMatrix();
+   glRotatef(Xrot, 1.0, 0.0, 0.0);
+   glRotatef(Yrot, 0.0, 1.0, 0.0);
+   glRotatef(Zrot, 0.0, 0.0, 1.0);
+
+   /* First pass: diffuse lighting with base texture */
+   glMaterialfv(GL_FRONT, GL_DIFFUSE, Diffuse);
+   glMaterialfv(GL_FRONT, GL_SPECULAR, Black);
+   glEnable(GL_TEXTURE_2D);
+   glBindTexture(GL_TEXTURE_2D, BaseTexture);
+   glCallList(Object);
+
+   /* Second pass: specular lighting with reflection texture */
+   glEnable(GL_POLYGON_OFFSET_FILL);
+   glBlendFunc(GL_ONE, GL_ONE);  /* add */
+   glEnable(GL_BLEND);
+   glMaterialfv(GL_FRONT, GL_DIFFUSE, Black);
+   glMaterialfv(GL_FRONT, GL_SPECULAR, White);
+   if (DoSpecTexture) {
+      glBindTexture(GL_TEXTURE_2D, SpecularTexture);
+      glEnable(GL_TEXTURE_GEN_S);
+      glEnable(GL_TEXTURE_GEN_T);
+   }
+   else {
+      glDisable(GL_TEXTURE_2D);
+   }
+   glCallList(Object);
+   glDisable(GL_TEXTURE_GEN_S);
+   glDisable(GL_TEXTURE_GEN_T);
+   glDisable(GL_BLEND);
+   glDisable(GL_POLYGON_OFFSET_FILL);
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+
+   if (Animate) {
+      GLint t = glutGet(GLUT_ELAPSED_TIME);
+      Frames++;
+      if (t - T0 >= 5000) {
+         GLfloat seconds = (t - T0) / 1000.0;
+         GLfloat fps = Frames / seconds;
+         printf("%d frames in %g seconds = %g FPS\n", Frames, seconds, fps);
+         T0 = t;
+         Frames = 0;
+      }
+   }
+}
+
+
+static void Reshape( int width, int height )
+{
+   GLfloat h = 30.0;
+   GLfloat w = h * width / height;
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -w, w, -h, h, 150.0, 500.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -380.0 );
+}
+
+
+static void ToggleAnimate(void)
+{
+   Animate = !Animate;
+   if (Animate) {
+      glutIdleFunc( Idle );
+      T0 = glutGet(GLUT_ELAPSED_TIME);
+      Frames = 0;
+   }
+   else {
+      glutIdleFunc( NULL );
+   }
+}
+
+
+static void ModeMenu(int entry)
+{
+   if (entry==ANIMATE) {
+      ToggleAnimate();
+   }
+   else if (entry==DO_SPEC_TEXTURE) {
+      DoSpecTexture = !DoSpecTexture;
+   }
+   else if (entry==OBJECT) {
+      if (Object == TeapotObj)
+         Object = CylinderObj;
+      else
+         Object = TeapotObj;
+   }
+   else if (entry==QUIT) {
+      exit(0);
+   }
+   glutPostRedisplay();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 's':
+         Shininess--;
+         if (Shininess < 0.0)
+            Shininess = 0.0;
+         glMaterialf(GL_FRONT, GL_SHININESS, Shininess);
+         printf("Shininess = %g\n", Shininess);
+         break;
+      case 'S':
+         Shininess++;
+         if (Shininess > 128.0)
+            Shininess = 128.0;
+         glMaterialf(GL_FRONT, GL_SHININESS, Shininess);
+         printf("Shininess = %g\n", Shininess);
+         break;
+      case ' ':
+         ToggleAnimate();
+         break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   float step = 3.0;
+   (void) x;
+   (void) y;
+
+   switch (key) {
+      case GLUT_KEY_UP:
+         Xrot += step;
+         break;
+      case GLUT_KEY_DOWN:
+         Xrot -= step;
+         break;
+      case GLUT_KEY_LEFT:
+         Yrot += step;
+         break;
+      case GLUT_KEY_RIGHT:
+         Yrot -= step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( int argc, char *argv[] )
+{
+   GLboolean convolve = GL_FALSE;
+   int i;
+
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-info")==0) {
+         printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+         printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+         printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+         printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+      }
+      else if (strcmp(argv[i], "-c")==0) {
+         convolve = GL_TRUE;
+      }
+   }
+
+
+   /* Cylinder object */
+   {
+      static GLfloat height = 100.0;
+      static GLfloat radius = 40.0;
+      static GLint slices = 24;  /* pie slices around Z axis */
+      static GLint stacks = 10;  /* subdivisions along length of cylinder */
+      static GLint rings = 4;    /* rings in the end disks */
+      GLUquadricObj *q = gluNewQuadric();
+      assert(q);
+      gluQuadricTexture(q, GL_TRUE);
+
+      CylinderObj = glGenLists(1);
+      glNewList(CylinderObj, GL_COMPILE);
+
+      glPushMatrix();
+      glTranslatef(0.0, 0.0, -0.5 * height);
+
+      glMatrixMode(GL_TEXTURE);
+      glLoadIdentity();
+      /*glScalef(8.0, 4.0, 2.0);*/
+      glMatrixMode(GL_MODELVIEW);
+
+      /* cylinder */
+      gluQuadricNormals(q, GL_SMOOTH);
+      gluQuadricTexture(q, GL_TRUE);
+      gluCylinder(q, radius, radius, height, slices, stacks);
+
+      /* end cap */
+      glMatrixMode(GL_TEXTURE);
+      glLoadIdentity();
+      glScalef(3.0, 3.0, 1.0);
+      glMatrixMode(GL_MODELVIEW);
+
+      glTranslatef(0.0, 0.0, height);
+      gluDisk(q, 0.0, radius, slices, rings);
+
+      /* other end cap */
+      glTranslatef(0.0, 0.0, -height);
+      gluQuadricOrientation(q, GLU_INSIDE);
+      gluDisk(q, 0.0, radius, slices, rings);
+
+      glPopMatrix();
+
+      glMatrixMode(GL_TEXTURE);
+      glLoadIdentity();
+      glMatrixMode(GL_MODELVIEW);
+
+      glEndList();
+      gluDeleteQuadric(q);
+   }
+
+   /* Teapot */
+   {
+      TeapotObj = glGenLists(1);
+      glNewList(TeapotObj, GL_COMPILE);
+
+      glFrontFace(GL_CW);
+      glutSolidTeapot(40.0);
+      glFrontFace(GL_CCW);
+
+      glEndList();
+   }
+
+   /* show cylinder by default */
+   Object = CylinderObj;
+
+
+   /* lighting */
+   glEnable(GL_LIGHTING);
+   {
+      GLfloat pos[4] = { 3, 3, 3, 1 };
+      glLightfv(GL_LIGHT0, GL_AMBIENT, Black);
+      glLightfv(GL_LIGHT0, GL_DIFFUSE, White);
+      glLightfv(GL_LIGHT0, GL_SPECULAR, White);
+      glLightfv(GL_LIGHT0, GL_POSITION, pos);
+      glEnable(GL_LIGHT0);
+      glMaterialfv(GL_FRONT, GL_AMBIENT, Black);
+      glMaterialf(GL_FRONT, GL_SHININESS, Shininess);
+      glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, 1);
+   }
+
+   /* Base texture */
+   glGenTextures(1, &BaseTexture);
+   glBindTexture(GL_TEXTURE_2D, BaseTexture);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   if (!LoadRGBMipmaps(BASE_TEXTURE_FILE, GL_RGB)) {
+      printf("Error: couldn't load texture image file %s\n", BASE_TEXTURE_FILE);
+      exit(1);
+   }
+
+   /* Specular texture */
+   glGenTextures(1, &SpecularTexture);
+   glBindTexture(GL_TEXTURE_2D, SpecularTexture);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
+   glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
+   if (convolve) {
+      /* use convolution to blur the texture to simulate a dull finish
+       * on the object.
+       */
+      GLubyte *img;
+      GLenum format;
+      GLint w, h;
+      GLfloat filter[FILTER_SIZE][FILTER_SIZE][4];
+
+      for (h = 0; h < FILTER_SIZE; h++) {
+         for (w = 0; w < FILTER_SIZE; w++) {
+            const GLfloat k = 1.0 / (FILTER_SIZE * FILTER_SIZE);
+            filter[h][w][0] = k;
+            filter[h][w][1] = k;
+            filter[h][w][2] = k;
+            filter[h][w][3] = k;
+         }
+      }
+
+      glEnable(GL_CONVOLUTION_2D);
+      glConvolutionParameteri(GL_CONVOLUTION_2D,
+                              GL_CONVOLUTION_BORDER_MODE, GL_CONSTANT_BORDER);
+      glConvolutionFilter2D(GL_CONVOLUTION_2D, GL_RGBA,
+                            FILTER_SIZE, FILTER_SIZE,
+                            GL_RGBA, GL_FLOAT, filter);
+
+      img = LoadRGBImage(SPECULAR_TEXTURE_FILE, &w, &h, &format);
+      if (!img) {
+         printf("Error: couldn't load texture image file %s\n",
+                SPECULAR_TEXTURE_FILE);
+         exit(1);
+      }
+
+      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, w, h, 0,
+                   format, GL_UNSIGNED_BYTE, img);
+      free(img);
+   }
+   else {
+      /* regular path */
+      if (!LoadRGBMipmaps(SPECULAR_TEXTURE_FILE, GL_RGB)) {
+         printf("Error: couldn't load texture image file %s\n",
+                SPECULAR_TEXTURE_FILE);
+         exit(1);
+      }
+   }
+
+   /* misc */
+   glEnable(GL_CULL_FACE);
+   glEnable(GL_TEXTURE_2D);
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_NORMALIZE);
+
+   glPolygonOffset( -1, -1 );
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize( 500, 500 );
+
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+
+   glutCreateWindow(argv[0] );
+
+   Init(argc, argv);
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+   glutIdleFunc( Idle );
+
+   glutCreateMenu(ModeMenu);
+   glutAddMenuEntry("Toggle Highlight", DO_SPEC_TEXTURE);
+   glutAddMenuEntry("Toggle Object", OBJECT);
+   glutAddMenuEntry("Toggle Animate", ANIMATE);
+   glutAddMenuEntry("Quit", QUIT);
+   glutAttachMenu(GLUT_RIGHT_BUTTON);
+
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/gltestperf.c b/progs/demos/gltestperf.c
new file mode 100644
index 000000000..be9539010
--- /dev/null
+++ b/progs/demos/gltestperf.c
@@ -0,0 +1,580 @@
+/*
+ * This program is under the GNU GPL.
+ * Use at your own risk.
+ *
+ * written by David Bucciarelli (tech.hmw@plus.it)
+ *            Humanware s.r.l.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include <GL/glut.h>
+
+typedef struct
+{
+   char *name;
+   char *unit;
+   void (*init) (void);
+   int (*run) (int, int);
+   int type;
+   int numsize;
+   int size[10];
+}
+benchmark;
+
+static int frontbuffer = 1;
+
+/***************************************************************************/
+
+static void
+init_test01(void)
+{
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluOrtho2D(-0.5, 639.5, -0.5, 479.5);
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_FLAT);
+   glDisable(GL_DEPTH_TEST);
+
+   glClearColor(0.0, 0.1, 1.0, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT);
+   glColor3f(1.0, 0.0, 0.0);
+}
+
+static int
+test01(int size, int num)
+{
+   int x, y;
+
+   glBegin(GL_POINTS);
+   for (y = 0; y < num; y++)
+      for (x = 0; x < 480; x++)
+	 glVertex2i(x, x);
+   glEnd();
+
+   return 480 * num;
+}
+
+/***************************************************************************/
+
+static void
+init_test02(void)
+{
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluOrtho2D(-0.5, 639.5, -0.5, 479.5);
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_SMOOTH);
+   glDisable(GL_DEPTH_TEST);
+
+   glClearColor(0.0, 0.1, 1.0, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT);
+}
+
+static int
+test02(int size, int num)
+{
+   int x, y;
+
+   glBegin(GL_LINES);
+   for (y = 0; y < num; y++)
+      for (x = 0; x < size; x++) {
+	 glColor3f(0.0, 1.0, y / (float) num);
+	 glVertex2i(0, size - 1);
+	 glColor3f(1.0, 0.0, x / (float) size);
+	 glVertex2i(x, x);
+      }
+   glEnd();
+
+   return num * size;
+}
+
+/***************************************************************************/
+
+static void
+init_test03(void)
+{
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-0.5, 639.5, -0.5, 479.5, 1.0, -1000.0 * 480.0);
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_SMOOTH);
+   glEnable(GL_DEPTH_TEST);
+
+   glClearColor(0.0, 0.1, 1.0, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+
+static int
+test03(int size, int num)
+{
+   int x, y, z;
+
+   glBegin(GL_TRIANGLES);
+   for (y = 0; y < num; y++)
+      for (x = 0; x < size; x += 5) {
+	 z = num * size - (y * size + x);
+	 glColor3f(0.0, 1.0, 0.0);
+	 glVertex3i(0, x, z);
+
+	 glColor3f(1.0, 0.0, x / (float) size);
+	 glVertex3i(size - 1 - x, 0, z);
+
+	 glColor3f(1.0, x / (float) size, 0.0);
+	 glVertex3i(x, size - 1 - x, z);
+      }
+   glEnd();
+
+   return size * num / 5;
+}
+
+/***************************************************************************/
+
+static void
+init_test04(void)
+{
+   int x, y;
+   GLubyte tex[128 * 128 * 3];
+   GLenum gluerr;
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-0.5, 639.5, -0.5, 479.5, 1.0, -1000.0 * 480.0);
+
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_SMOOTH);
+   glEnable(GL_DEPTH_TEST);
+
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+   for (y = 0; y < 128; y++)
+      for (x = 0; x < 128; x++) {
+	 tex[(x + y * 128) * 3 + 0] = ((x % (128 / 4)) < (128 / 8)) ? 255 : 0;
+	 tex[(x + y * 128) * 3 + 1] = ((y % (128 / 4)) < (128 / 8)) ? 255 : 0;
+	 tex[(x + y * 128) * 3 + 2] = x;
+      }
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   if ((gluerr = gluBuild2DMipmaps(GL_TEXTURE_2D, 3, 128, 128, GL_RGB,
+				   GL_UNSIGNED_BYTE, (GLvoid *) (&tex[0])))) {
+      fprintf(stderr, "GLULib%s\n", (char *) gluErrorString(gluerr));
+      exit(-1);
+   }
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+		   GL_LINEAR_MIPMAP_NEAREST);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+   glEnable(GL_TEXTURE_2D);
+
+   glClearColor(0.0, 0.1, 1.0, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+
+static int
+test04(int size, int num)
+{
+   int x, y, z;
+
+   glBegin(GL_TRIANGLES);
+   for (y = 0; y < num; y++)
+      for (x = 0; x < size; x += 5) {
+	 z = num * size - (y * size + x);
+	 glTexCoord2f(1.0, 1.0);
+	 glColor3f(1.0, 0.0, 0.0);
+	 glVertex3i(0, x, z);
+
+	 glTexCoord2f(0.0, 1.0);
+	 glColor3f(0.0, 1.0, 0.0);
+	 glVertex3i(size - 1 - x, 0, z);
+
+	 glTexCoord2f(1.0, 0.0);
+	 glColor3f(0.0, 0.0, 1.0);
+	 glVertex3i(x, size - 1 - x, z);
+      }
+   glEnd();
+
+   return num * size / 5;
+}
+
+/***************************************************************************/
+
+static void
+init_test05(void)
+{
+   int x, y;
+   GLubyte tex[128 * 128 * 3];
+   GLenum gluerr;
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-0.5, 639.5, -0.5, 479.5, -1.0, 1.0);
+
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_SMOOTH);
+   glEnable(GL_DEPTH_TEST);
+
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+   for (y = 0; y < 128; y++)
+      for (x = 0; x < 128; x++) {
+	 tex[(x + y * 128) * 3 + 0] = ((x % (128 / 4)) < (128 / 8)) ? 255 : 0;
+	 tex[(x + y * 128) * 3 + 1] = ((y % (128 / 4)) < (128 / 8)) ? 255 : 0;
+	 tex[(x + y * 128) * 3 + 2] = x;
+      }
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   if ((gluerr = gluBuild2DMipmaps(GL_TEXTURE_2D, 3, 128, 128, GL_RGB,
+				   GL_UNSIGNED_BYTE, (GLvoid *) (&tex[0])))) {
+      fprintf(stderr, "GLULib%s\n", (char *) gluErrorString(gluerr));
+      exit(-1);
+   }
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+		   GL_LINEAR_MIPMAP_NEAREST);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+   glEnable(GL_TEXTURE_2D);
+
+   glDepthFunc(GL_ALWAYS);
+
+   glClearColor(0.0, 0.1, 1.0, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+
+static int
+test05(int size, int num)
+{
+   int y;
+   float v0[3], v1[3], v2[3], v3[3];
+   float cv0[3], cv1[3], cv2[3], cv3[3];
+   float tv0[3], tv1[3], tv2[3], tv3[3];
+
+   v0[0] = 320 - size / 2;
+   v0[1] = 240 - size / 2;
+   v0[2] = 0.0;
+   v1[0] = 320 + size / 2;
+   v1[1] = 240 - size / 2;
+   v1[2] = 0.0;
+   v2[0] = 320 - size / 2;
+   v2[1] = 240 + size / 2;
+   v2[2] = 0.0;
+   v3[0] = 320 + size / 2;
+   v3[1] = 240 + size / 2;
+   v3[2] = 0.0;
+   cv0[0] = 1.0;
+   cv0[1] = 0.0;
+   cv0[2] = 0.0;
+   cv1[0] = 1.0;
+   cv1[1] = 1.0;
+   cv1[2] = 0.0;
+   cv2[0] = 1.0;
+   cv2[1] = 0.0;
+   cv2[2] = 1.0;
+   cv3[0] = 1.0;
+   cv3[1] = 1.0;
+   cv3[2] = 1.0;
+   tv0[0] = 0.0;
+   tv0[1] = 0.0;
+   tv0[2] = 0.0;
+   tv1[0] = 1.0;
+   tv1[1] = 0.0;
+   tv1[2] = 0.0;
+   tv2[0] = 0.0;
+   tv2[1] = 1.0;
+   tv2[2] = 0.0;
+   tv3[0] = 1.0;
+   tv3[1] = 1.0;
+   tv3[2] = 0.0;
+
+   glBegin(GL_TRIANGLE_STRIP);
+   for (y = 0; y < num; y++) {
+      glColor3fv(cv0);
+      glTexCoord2fv(tv0);
+      glVertex3fv(v0);
+
+      glColor3fv(cv1);
+      glTexCoord2fv(tv1);
+      glVertex3fv(v1);
+
+      glColor3fv(cv2);
+      glTexCoord2fv(tv2);
+      glVertex3fv(v2);
+
+      glColor3fv(cv3);
+      glTexCoord2fv(tv3);
+      glVertex3fv(v3);
+   }
+   glEnd();
+
+   return 4 * num - 2;
+}
+
+/***************************************************************************/
+
+static void
+init_test06(void)
+{
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluOrtho2D(-0.5, 639.5, -0.5, 479.5);
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_SMOOTH);
+   glEnable(GL_DEPTH_TEST);
+
+   glClearColor(0.0, 0.1, 1.0, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+
+static int
+test06(int size, int num)
+{
+   int y;
+
+   for (y = 0; y < num; y++) {
+      glClearColor(y / (float) num, 0.1, 1.0, 0.0);
+      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   }
+
+   return num;
+}
+
+/***************************************************************************/
+
+#define BMARKS_TIME 5.0
+
+#define NUM_BMARKS 6
+
+/* 554 ~= sqrt(640*480) */
+
+static benchmark bmarks[NUM_BMARKS] = {
+   {"Simple Points", "Pnts", init_test01, test01, 0, 0,
+    {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
+   {"Smooth Lines", "Lins", init_test02, test02, 1, 5,
+    {480, 250, 100, 50, 25, 0, 0, 0, 0, 0}},
+   {"ZSmooth Triangles", "Tris", init_test03, test03, 1, 5,
+    {480, 250, 100, 50, 25, 0, 0, 0, 0, 0}},
+   {"ZSmooth Tex Blend Triangles", "Tris", init_test04, test04, 1, 5,
+    {480, 250, 100, 50, 25, 0, 0, 0, 0, 0}},
+   {"ZSmooth Tex Blend TMesh Triangles", "Tris", init_test05, test05, 2, 8,
+    {400, 250, 100, 50, 25, 10, 5, 2, 0, 0}},
+   {"Color/Depth Buffer Clears", "Clrs", init_test06, test06, 3, 0,
+    {554, 0, 0, 0, 0, 0, 0, 0, 0, 0}}
+};
+
+/***************************************************************************/
+
+static void
+dotest0param(benchmark * bmark)
+{
+   float stime, etime, dtime, tottime, maxtime, mintime;
+   int num, numelem, calibnum, j;
+
+   glPushAttrib(GL_ALL_ATTRIB_BITS);
+   bmark->init();
+
+   stime = glutGet(GLUT_ELAPSED_TIME);
+
+   dtime = 0.0;
+   calibnum = 0;
+   while (dtime < 2.0) {
+      bmark->run(0, 1);
+      glFinish();
+      etime = glutGet(GLUT_ELAPSED_TIME);
+      dtime = (etime - stime) / 1000.0;
+      calibnum++;
+   }
+   glPopAttrib();
+
+   fprintf(stderr, "Elapsed time for the calibration test (%d): %f\n",
+	   calibnum, dtime);
+
+   num = (int) ((BMARKS_TIME / dtime) * calibnum);
+
+   if (num < 1)
+      num = 1;
+
+   fprintf(stderr, "Selected number of benchmark iterations: %d\n", num);
+
+   mintime = HUGE_VAL;
+   maxtime = -HUGE_VAL;
+
+   for (tottime = 0.0, j = 0; j < 5; j++) {
+      glPushAttrib(GL_ALL_ATTRIB_BITS);
+      bmark->init();
+
+      stime = glutGet(GLUT_ELAPSED_TIME);
+      numelem = bmark->run(0, num);
+      glFinish();
+      etime = glutGet(GLUT_ELAPSED_TIME);
+
+      glPopAttrib();
+
+      dtime = (etime - stime) / 1000.0;
+      tottime += dtime;
+
+      fprintf(stderr, "Elapsed time for run %d: %f\n", j, dtime);
+
+      if (dtime < mintime)
+	 mintime = dtime;
+      if (dtime > maxtime)
+	 maxtime = dtime;
+   }
+
+   tottime -= mintime + maxtime;
+
+   fprintf(stdout, "%s\n%f %s/sec", bmark->name, numelem / (tottime / 3.0),
+	   bmark->unit);
+
+   if (bmark->type == 3)
+      fprintf(stdout, ", MPixel Fill/sec: %f\n\n",
+	      (numelem * bmark->size[0] * (float) bmark->size[0]) /
+	      (1000000.0 * tottime / 3.0));
+   else
+      fprintf(stdout, "\n\n");
+}
+
+/***************************************************************************/
+
+static void
+dotest1param(benchmark * bmark)
+{
+   float stime, etime, dtime, tottime, maxtime, mintime;
+   int num, numelem, calibnum, j, k;
+
+   fprintf(stdout, "%s\n", bmark->name);
+
+   for (j = 0; j < bmark->numsize; j++) {
+      fprintf(stderr, "Current size: %d\n", bmark->size[j]);
+
+      glPushAttrib(GL_ALL_ATTRIB_BITS);
+      bmark->init();
+
+      stime = glutGet(GLUT_ELAPSED_TIME);
+
+      dtime = 0.0;
+      calibnum = 0;
+      while (dtime < 2.0) {
+	 bmark->run(bmark->size[j], 1);
+	 glFinish();
+	 etime = glutGet(GLUT_ELAPSED_TIME);
+	 dtime = (etime - stime) / 1000.0;
+	 calibnum++;
+      }
+      glPopAttrib();
+
+      fprintf(stderr, "Elapsed time for the calibration test (%d): %f\n",
+	      calibnum, dtime);
+
+      num = (int) ((BMARKS_TIME / dtime) * calibnum);
+
+      if (num < 1)
+	 num = 1;
+
+      fprintf(stderr, "Selected number of benchmark iterations: %d\n", num);
+
+      mintime = HUGE_VAL;
+      maxtime = -HUGE_VAL;
+
+      for (numelem = 1, tottime = 0.0, k = 0; k < 5; k++) {
+	 glPushAttrib(GL_ALL_ATTRIB_BITS);
+	 bmark->init();
+
+	 stime = glutGet(GLUT_ELAPSED_TIME);
+	 numelem = bmark->run(bmark->size[j], num);
+	 glFinish();
+	 etime = glutGet(GLUT_ELAPSED_TIME);
+
+	 glPopAttrib();
+
+	 dtime = (etime - stime) / 1000.0;
+	 tottime += dtime;
+
+	 fprintf(stderr, "Elapsed time for run %d: %f\n", k, dtime);
+
+	 if (dtime < mintime)
+	    mintime = dtime;
+	 if (dtime > maxtime)
+	    maxtime = dtime;
+      }
+
+      tottime -= mintime + maxtime;
+
+      fprintf(stdout, "SIZE=%03d => %f %s/sec", bmark->size[j],
+	      numelem / (tottime / 3.0), bmark->unit);
+      if (bmark->type == 2)
+	 fprintf(stdout, ", MPixel Fill/sec: %f\n",
+		 (numelem * bmark->size[j] * bmark->size[j] / 2) /
+		 (1000000.0 * tottime / 3.0));
+      else
+	 fprintf(stdout, "\n");
+   }
+
+   fprintf(stdout, "\n\n");
+}
+
+/***************************************************************************/
+
+static void
+display(void)
+{
+   int i;
+
+   if (frontbuffer)
+      glDrawBuffer(GL_FRONT);
+   else
+      glDrawBuffer(GL_BACK);
+
+   for (i = 0; i < NUM_BMARKS; i++) {
+      fprintf(stderr, "Benchmark: %d\n", i);
+
+      switch (bmarks[i].type) {
+      case 0:
+      case 3:
+	 dotest0param(&bmarks[i]);
+	 break;
+      case 1:
+      case 2:
+	 dotest1param(&bmarks[i]);
+	 break;
+      }
+   }
+
+   exit(0);
+}
+
+int
+main(int ac, char **av)
+{
+   fprintf(stderr, "GLTest v1.0\nWritten by David Bucciarelli\n");
+
+   if (ac == 2)
+      frontbuffer = 0;
+
+   glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(640, 480);
+   glutCreateWindow("OpenGL/Mesa Performances");
+   glutDisplayFunc(display);
+   glutMainLoop();
+
+   return 0;
+}
diff --git a/progs/demos/glutfx.c b/progs/demos/glutfx.c
new file mode 100644
index 000000000..8bf558238
--- /dev/null
+++ b/progs/demos/glutfx.c
@@ -0,0 +1,189 @@
+
+/*
+ * Example of how one might use GLUT with the 3Dfx driver in full-screen mode.
+ * Note: this only works with X since we're using Mesa's GLX "hack" for
+ * using Glide.
+ *
+ * Goals:
+ *   easy setup and input event handling with GLUT
+ *   use 3Dfx hardware
+ *   automatically set MESA environment variables
+ *   don't lose mouse input focus
+ *
+ * Brian Paul   This file is in the public domain.
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+
+
+#define WIDTH 640
+#define HEIGHT 480
+
+
+static int Window = 0;
+static int ScreenWidth, ScreenHeight;
+static GLuint Torus = 0;
+static GLfloat Xrot = 0.0, Yrot = 0.0;
+
+
+
+static void Display( void )
+{
+   static GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0};
+   static GLfloat red[4] = {1.0, 0.2, 0.2, 1.0};
+   static GLfloat green[4] = {0.2, 1.0, 0.2, 1.0};
+
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glPushMatrix();
+   glRotatef(Xrot, 1, 0, 0);
+   glRotatef(Yrot, 0, 1, 0);
+
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue);
+   glCallList(Torus);
+
+   glRotatef(90.0, 1, 0, 0);
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red);
+   glCallList(Torus);
+
+   glRotatef(90.0, 0, 1, 0);
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green);
+   glCallList(Torus);
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   float ratio = (float) width / (float) height;
+
+   ScreenWidth = width;
+   ScreenHeight = height;
+
+   /*
+    * The 3Dfx driver is limited to 640 x 480 but the X window may be larger.
+    * Enforce that here.
+    */
+   if (width > WIDTH)
+      width = WIDTH;
+   if (height > HEIGHT)
+      height = HEIGHT;
+
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -ratio, ratio, -1.0, 1.0, 5.0, 30.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -20.0 );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         glutDestroyWindow(Window);
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         break;
+      case GLUT_KEY_DOWN:
+         break;
+      case GLUT_KEY_LEFT:
+         break;
+      case GLUT_KEY_RIGHT:
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void MouseMove( int x, int y )
+{
+   Xrot = y - ScreenWidth / 2;
+   Yrot = x - ScreenHeight / 2;
+   glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+   Torus = glGenLists(1);
+   glNewList(Torus, GL_COMPILE);
+   glutSolidTorus(0.5, 2.0, 10, 20);
+   glEndList();
+
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_CULL_FACE);
+}
+
+
+int main( int argc, char *argv[] )
+{
+#ifndef _WIN32
+   printf("NOTE: if you've got 3Dfx VooDoo hardware you must run this");
+   printf(" program as root.\n\n");
+   printf("Move the mouse.  Press ESC to exit.\n\n");
+#endif
+
+   /* Tell Mesa GLX to use 3Dfx driver in fullscreen mode. */
+   putenv("MESA_GLX_FX=fullscreen");
+
+   /* Disable 3Dfx Glide splash screen */
+   putenv("FX_GLIDE_NO_SPLASH=");
+
+   /* Give an initial size and position so user doesn't have to place window */
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(WIDTH, HEIGHT);
+   glutInit( &argc, argv );
+
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+
+   Window = glutCreateWindow(argv[0]);
+   if (!Window) {
+      printf("Error, couldn't open window\n");
+      exit(1);
+   }
+
+   /*
+    * Want the X window to fill the screen so that we don't have to
+    * worry about losing the mouse input focus.
+    * Note that we won't actually see the X window since we never draw
+    * to it, hence, the original X screen's contents aren't disturbed.
+    */
+   glutFullScreen();
+
+   Init();
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+   glutPassiveMotionFunc( MouseMove );
+
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/ipers.c b/progs/demos/ipers.c
new file mode 100644
index 000000000..6e153c04e
--- /dev/null
+++ b/progs/demos/ipers.c
@@ -0,0 +1,712 @@
+/*
+ * This program is under the GNU GPL.
+ * Use at your own risk.
+ *
+ * written by David Bucciarelli (tech.hmw@plus.it)
+ *            Humanware s.r.l.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+
+#if defined (WIN32)|| defined(_WIN32)
+#include <windows.h>
+#include <mmsystem.h>
+#endif
+
+#include <GL/glut.h>
+
+#include "readtex.h"
+
+#ifdef XMESA
+#include "GL/xmesa.h"
+static int fullscreen = 1;
+#endif
+
+static int WIDTH = 640;
+static int HEIGHT = 480;
+
+static GLint T0;
+static GLint Frames;
+
+#define MAX_LOD 9
+
+#define TEX_SKY_WIDTH 256
+#define TEX_SKY_HEIGHT TEX_SKY_WIDTH
+
+#ifndef M_PI
+#define M_PI 3.1415926535
+#endif
+
+#define FROM_NONE   0
+#define FROM_DOWN   1
+#define FROM_UP     2
+#define FROM_LEFT   3
+#define FROM_RIGHT  4
+#define FROM_FRONT  5
+#define FROM_BACK   6
+
+static int win = 0;
+
+static float obs[3] = { 3.8, 0.0, 0.0 };
+static float dir[3];
+static float v = 0.0;
+static float alpha = -90.0;
+static float beta = 90.0;
+
+static int fog = 1;
+static int bfcull = 1;
+static int usetex = 1;
+static int help = 1;
+static int poutline = 0;
+static int normext = 1;
+static int joyavailable = 0;
+static int joyactive = 0;
+static int LODbias = 3;
+static int maxdepth = MAX_LOD;
+
+static unsigned int totpoly = 0;
+
+static GLuint t1id, t2id;
+static GLuint skydlist, LODdlist[MAX_LOD], LODnumpoly[MAX_LOD];
+
+static void
+initlight(void)
+{
+   GLfloat lspec[4] = { 1.0, 1.0, 1.0, 1.0 };
+   static GLfloat lightpos[4] = { 30, 15.0, 30.0, 1.0 };
+
+   glLightfv(GL_LIGHT0, GL_POSITION, lightpos);
+   glLightfv(GL_LIGHT0, GL_SPECULAR, lspec);
+
+   glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 32.0);
+   glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, lspec);
+}
+
+static void
+initdlists(void)
+{
+   static int slicetable[MAX_LOD][2] = {
+      {21, 10},
+      {18, 9},
+      {15, 8},
+      {12, 7},
+      {9, 6},
+      {7, 5},
+      {5, 4},
+      {4, 3},
+      {3, 2}
+   };
+   GLUquadricObj *obj;
+   int i, xslices, yslices;
+
+   obj = gluNewQuadric();
+
+   skydlist = glGenLists(1);
+   glNewList(skydlist, GL_COMPILE);
+   glBindTexture(GL_TEXTURE_2D, t2id);
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+   glColor3f(1.0f, 1.0f, 1.0f);
+
+   gluQuadricDrawStyle(obj, GLU_FILL);
+   gluQuadricNormals(obj, GLU_NONE);
+   gluQuadricTexture(obj, GL_TRUE);
+   gluQuadricOrientation(obj, GLU_INSIDE);
+   gluSphere(obj, 40.0f, 18, 9);
+
+   glEndList();
+
+   for (i = 0; i < MAX_LOD; i++) {
+      LODdlist[i] = glGenLists(1);
+      glNewList(LODdlist[i], GL_COMPILE);
+
+      gluQuadricDrawStyle(obj, GLU_FILL);
+      gluQuadricNormals(obj, GLU_SMOOTH);
+      gluQuadricTexture(obj, GL_TRUE);
+      gluQuadricOrientation(obj, GLU_OUTSIDE);
+      xslices = slicetable[i][0];
+      yslices = slicetable[i][1];
+      gluSphere(obj, 1.0f, xslices, yslices);
+      LODnumpoly[i] = xslices * (yslices - 2) + 2 * (xslices - 1);
+
+      glEndList();
+   }
+}
+
+static void
+inittextures(void)
+{
+   GLubyte tsky[TEX_SKY_HEIGHT][TEX_SKY_WIDTH][3];
+   GLuint x, y;
+   GLfloat fact;
+   GLenum gluerr;
+
+   /* Brick */
+
+   glGenTextures(1, &t1id);
+   glBindTexture(GL_TEXTURE_2D, t1id);
+
+   if (!LoadRGBMipmaps("../images/bw.rgb", 3)) {
+      fprintf(stderr, "Error reading a texture.\n");
+      exit(-1);
+   }
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+		   GL_LINEAR_MIPMAP_LINEAR);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   /* Sky */
+
+   glGenTextures(1, &t2id);
+   glBindTexture(GL_TEXTURE_2D, t2id);
+
+   for (y = 0; y < TEX_SKY_HEIGHT; y++)
+      for (x = 0; x < TEX_SKY_WIDTH; x++)
+	 if (y < TEX_SKY_HEIGHT / 2) {
+	    fact = y / (GLfloat) (TEX_SKY_HEIGHT / 2);
+	    tsky[y][x][0] =
+	       (GLubyte) (255.0f * (0.1f * fact + 0.3f * (1.0f - fact)));
+	    tsky[y][x][1] =
+	       (GLubyte) (255.0f * (0.2f * fact + 1.0f * (1.0f - fact)));
+	    tsky[y][x][2] = 255;
+	 }
+	 else {
+	    tsky[y][x][0] = tsky[TEX_SKY_HEIGHT - y - 1][x][0];
+	    tsky[y][x][1] = tsky[TEX_SKY_HEIGHT - y - 1][x][1];
+	    tsky[y][x][2] = 255;
+	 }
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   if (
+       (gluerr =
+	gluBuild2DMipmaps(GL_TEXTURE_2D, 3, TEX_SKY_WIDTH, TEX_SKY_HEIGHT,
+			  GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *) (tsky)))) {
+      fprintf(stderr, "GLULib%s\n", (char *) gluErrorString(gluerr));
+      exit(-1);
+   }
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+		   GL_LINEAR_MIPMAP_LINEAR);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+}
+
+static void
+calcposobs(void)
+{
+   dir[0] = sin(alpha * M_PI / 180.0);
+   dir[1] = cos(alpha * M_PI / 180.0) * sin(beta * M_PI / 180.0);
+   dir[2] = cos(beta * M_PI / 180.0);
+
+   if (dir[0] < 1.0e-5 && dir[0] > -1.0e-5)
+      dir[0] = 0;
+   if (dir[1] < 1.0e-5 && dir[1] > -1.0e-5)
+      dir[1] = 0;
+   if (dir[2] < 1.0e-5 && dir[2] > -1.0e-5)
+      dir[2] = 0;
+
+   obs[0] += v * dir[0];
+   obs[1] += v * dir[1];
+   obs[2] += v * dir[2];
+}
+
+static void
+special(int k, int x, int y)
+{
+   switch (k) {
+   case GLUT_KEY_LEFT:
+      alpha -= 2.0;
+      break;
+   case GLUT_KEY_RIGHT:
+      alpha += 2.0;
+      break;
+   case GLUT_KEY_DOWN:
+      beta -= 2.0;
+      break;
+   case GLUT_KEY_UP:
+      beta += 2.0;
+      break;
+   }
+}
+
+static void
+key(unsigned char k, int x, int y)
+{
+   switch (k) {
+   case 27:
+      exit(0);
+      break;
+
+   case 'a':
+      v += 0.01;
+      break;
+   case 'z':
+      v -= 0.01;
+      break;
+
+#ifdef XMESA
+   case ' ':
+      fullscreen = (!fullscreen);
+      XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
+      break;
+#endif
+
+   case '+':
+      LODbias--;
+      break;
+   case '-':
+      LODbias++;
+      break;
+   case 'j':
+      joyactive = (!joyactive);
+      break;
+   case 'h':
+      help = (!help);
+      break;
+   case 'f':
+      fog = (!fog);
+      break;
+   case 't':
+      usetex = (!usetex);
+      break;
+   case 'n':
+      normext = (!normext);
+      break;
+   case 'b':
+      if (bfcull) {
+	 glDisable(GL_CULL_FACE);
+	 bfcull = 0;
+      }
+      else {
+	 glEnable(GL_CULL_FACE);
+	 bfcull = 1;
+      }
+      break;
+   case 'p':
+      if (poutline) {
+	 glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+	 poutline = 0;
+	 usetex = 1;
+      }
+      else {
+	 glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+	 poutline = 1;
+	 usetex = 0;
+      }
+      break;
+   }
+}
+
+static void
+reshape(int w, int h)
+{
+   WIDTH = w;
+   HEIGHT = h;
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluPerspective(90.0, w / (float) h, 0.8, 100.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glViewport(0, 0, w, h);
+}
+
+static void
+printstring(void *font, char *string)
+{
+   int len, i;
+
+   len = (int) strlen(string);
+   for (i = 0; i < len; i++)
+      glutBitmapCharacter(font, string[i]);
+}
+
+static void
+printhelp(void)
+{
+   glEnable(GL_BLEND);
+   glColor4f(0.5, 0.5, 0.5, 0.5);
+   glRecti(40, 40, 600, 440);
+   glDisable(GL_BLEND);
+
+   glColor3f(1.0, 0.0, 0.0);
+   glRasterPos2i(300, 420);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Help");
+
+   glRasterPos2i(60, 390);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Toggle Help");
+   glRasterPos2i(60, 360);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Toggle Textures");
+   glRasterPos2i(60, 330);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog");
+   glRasterPos2i(60, 300);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Toggle Back face culling");
+   glRasterPos2i(60, 270);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate");
+   glRasterPos2i(60, 240);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "a - Increase velocity");
+   glRasterPos2i(60, 210);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "z - Decrease velocity");
+   glRasterPos2i(60, 180);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "p - Toggle Wire frame");
+   glRasterPos2i(60, 150);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24,
+	       "n - Toggle GL_EXT_rescale_normal extension");
+   glRasterPos2i(60, 120);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24,
+	       "+/- - Increase/decrease the Object maximum LOD");
+
+   glRasterPos2i(60, 90);
+   if (joyavailable)
+      printstring(GLUT_BITMAP_TIMES_ROMAN_24,
+		  "j - Toggle jostick control (Joystick control available)");
+   else
+      printstring(GLUT_BITMAP_TIMES_ROMAN_24,
+		  "(No Joystick control available)");
+}
+
+static void
+dojoy(void)
+{
+#ifdef _WIN32
+   static UINT max[2] = { 0, 0 };
+   static UINT min[2] = { 0xffffffff, 0xffffffff }, center[2];
+   MMRESULT res;
+   JOYINFO joy;
+
+   res = joyGetPos(JOYSTICKID1, &joy);
+
+   if (res == JOYERR_NOERROR) {
+      joyavailable = 1;
+
+      if (max[0] < joy.wXpos)
+	 max[0] = joy.wXpos;
+      if (min[0] > joy.wXpos)
+	 min[0] = joy.wXpos;
+      center[0] = (max[0] + min[0]) / 2;
+
+      if (max[1] < joy.wYpos)
+	 max[1] = joy.wYpos;
+      if (min[1] > joy.wYpos)
+	 min[1] = joy.wYpos;
+      center[1] = (max[1] + min[1]) / 2;
+
+      if (joyactive) {
+	 if (fabs(center[0] - (float) joy.wXpos) > 0.1 * (max[0] - min[0]))
+	    alpha -=
+	       2.0 * (center[0] - (float) joy.wXpos) / (max[0] - min[0]);
+	 if (fabs(center[1] - (float) joy.wYpos) > 0.1 * (max[1] - min[1]))
+	    beta += 2.0 * (center[1] - (float) joy.wYpos) / (max[1] - min[1]);
+
+	 if (joy.wButtons & JOY_BUTTON1)
+	    v += 0.01;
+	 if (joy.wButtons & JOY_BUTTON2)
+	    v -= 0.01;
+      }
+   }
+   else
+      joyavailable = 0;
+#endif
+}
+
+static void
+drawipers(int depth, int from)
+{
+   int lod;
+
+   if (depth == maxdepth)
+      return;
+
+   lod = depth + LODbias;
+   if (lod < 0)
+      lod = 0;
+   if (lod >= MAX_LOD)
+      return;
+
+   switch (from) {
+   case FROM_NONE:
+      glCallList(LODdlist[lod]);
+
+      depth++;
+      drawipers(depth, FROM_DOWN);
+      drawipers(depth, FROM_UP);
+      drawipers(depth, FROM_FRONT);
+      drawipers(depth, FROM_BACK);
+      drawipers(depth, FROM_LEFT);
+      drawipers(depth, FROM_RIGHT);
+      break;
+   case FROM_FRONT:
+      glPushMatrix();
+      glTranslatef(0.0f, -1.5f, 0.0f);
+      glScalef(0.5f, 0.5f, 0.5f);
+
+      glCallList(LODdlist[lod]);
+
+      depth++;
+      drawipers(depth, FROM_DOWN);
+      drawipers(depth, FROM_UP);
+      drawipers(depth, FROM_FRONT);
+      drawipers(depth, FROM_LEFT);
+      drawipers(depth, FROM_RIGHT);
+      glPopMatrix();
+      break;
+   case FROM_BACK:
+      glPushMatrix();
+      glTranslatef(0.0f, 1.5f, 0.0f);
+      glScalef(0.5f, 0.5f, 0.5f);
+
+      glCallList(LODdlist[lod]);
+
+      depth++;
+      drawipers(depth, FROM_DOWN);
+      drawipers(depth, FROM_UP);
+      drawipers(depth, FROM_BACK);
+      drawipers(depth, FROM_LEFT);
+      drawipers(depth, FROM_RIGHT);
+      glPopMatrix();
+      break;
+   case FROM_LEFT:
+      glPushMatrix();
+      glTranslatef(-1.5f, 0.0f, 0.0f);
+      glScalef(0.5f, 0.5f, 0.5f);
+
+      glCallList(LODdlist[lod]);
+
+      depth++;
+      drawipers(depth, FROM_DOWN);
+      drawipers(depth, FROM_UP);
+      drawipers(depth, FROM_FRONT);
+      drawipers(depth, FROM_BACK);
+      drawipers(depth, FROM_LEFT);
+      glPopMatrix();
+      break;
+   case FROM_RIGHT:
+      glPushMatrix();
+      glTranslatef(1.5f, 0.0f, 0.0f);
+      glScalef(0.5f, 0.5f, 0.5f);
+
+      glCallList(LODdlist[lod]);
+
+      depth++;
+      drawipers(depth, FROM_DOWN);
+      drawipers(depth, FROM_UP);
+      drawipers(depth, FROM_FRONT);
+      drawipers(depth, FROM_BACK);
+      drawipers(depth, FROM_RIGHT);
+      glPopMatrix();
+      break;
+   case FROM_DOWN:
+      glPushMatrix();
+      glTranslatef(0.0f, 0.0f, 1.5f);
+      glScalef(0.5f, 0.5f, 0.5f);
+
+      glCallList(LODdlist[lod]);
+
+      depth++;
+      drawipers(depth, FROM_DOWN);
+      drawipers(depth, FROM_FRONT);
+      drawipers(depth, FROM_BACK);
+      drawipers(depth, FROM_LEFT);
+      drawipers(depth, FROM_RIGHT);
+      glPopMatrix();
+      break;
+   case FROM_UP:
+      glPushMatrix();
+      glTranslatef(0.0f, 0.0f, -1.5f);
+      glScalef(0.5f, 0.5f, 0.5f);
+
+      glCallList(LODdlist[lod]);
+
+      depth++;
+      drawipers(depth, FROM_UP);
+      drawipers(depth, FROM_FRONT);
+      drawipers(depth, FROM_BACK);
+      drawipers(depth, FROM_LEFT);
+      drawipers(depth, FROM_RIGHT);
+      glPopMatrix();
+      break;
+   }
+
+   totpoly += LODnumpoly[lod];
+}
+
+static void
+draw(void)
+{
+   static char frbuf[80] = "";
+   static GLfloat alpha = 0.0f;
+   static GLfloat beta = 0.0f;
+   static float fr = 0.0;
+   static double t0 = -1.;
+   double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+
+   dojoy();
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   if (usetex)
+      glEnable(GL_TEXTURE_2D);
+   else
+      glDisable(GL_TEXTURE_2D);
+
+   if (fog)
+      glEnable(GL_FOG);
+   else
+      glDisable(GL_FOG);
+
+   glPushMatrix();
+   calcposobs();
+   gluLookAt(obs[0], obs[1], obs[2],
+	     obs[0] + dir[0], obs[1] + dir[1], obs[2] + dir[2],
+	     0.0, 0.0, 1.0);
+
+   /* Scene */
+   glEnable(GL_DEPTH_TEST);
+
+   glShadeModel(GL_SMOOTH);
+   glBindTexture(GL_TEXTURE_2D, t1id);
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+   glColor3f(1.0f, 1.0f, 1.0f);
+   glEnable(GL_LIGHT0);
+   glEnable(GL_LIGHTING);
+
+   if (normext)
+      glEnable(GL_RESCALE_NORMAL_EXT);
+   else
+      glEnable(GL_NORMALIZE);
+
+   glPushMatrix();
+   glRotatef(alpha, 0.0f, 0.0f, 1.0f);
+   glRotatef(beta, 1.0f, 0.0f, 0.0f);
+   totpoly = 0;
+   drawipers(0, FROM_NONE);
+   glPopMatrix();
+
+   alpha += 4.f * dt;
+   beta += 2.4f * dt;
+
+   glDisable(GL_LIGHTING);
+   glDisable(GL_LIGHT0);
+   glShadeModel(GL_FLAT);
+
+   if (normext)
+      glDisable(GL_RESCALE_NORMAL_EXT);
+   else
+      glDisable(GL_NORMALIZE);
+
+   glCallList(skydlist);
+
+   glPopMatrix();
+
+   /* Help Screen */
+
+   sprintf(frbuf,
+	   "Frame rate: %0.2f   LOD: %d   Tot. poly.: %d   Poly/sec: %.1f",
+	   fr, LODbias, totpoly, totpoly * fr);
+
+   glDisable(GL_TEXTURE_2D);
+   glDisable(GL_FOG);
+   glShadeModel(GL_FLAT);
+   glDisable(GL_DEPTH_TEST);
+
+   glMatrixMode(GL_PROJECTION);
+   glPushMatrix();
+   glLoadIdentity();
+   glOrtho(-0.5, 639.5, -0.5, 479.5, -1.0, 1.0);
+
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+
+   glColor3f(1.0, 0.0, 0.0);
+   glRasterPos2i(10, 10);
+   printstring(GLUT_BITMAP_HELVETICA_18, frbuf);
+   glRasterPos2i(350, 470);
+   printstring(GLUT_BITMAP_HELVETICA_10,
+	       "IperS V1.0 Written by David Bucciarelli (tech.hmw@plus.it)");
+
+   if (help)
+      printhelp();
+
+   glMatrixMode(GL_PROJECTION);
+   glPopMatrix();
+   glMatrixMode(GL_MODELVIEW);
+
+   glutSwapBuffers();
+
+   Frames++;
+   {
+      GLint t = glutGet(GLUT_ELAPSED_TIME);
+      if (t - T0 >= 2000) {
+         GLfloat seconds = (t - T0) / 1000.0;
+         fr = Frames / seconds;
+         T0 = t;
+         Frames = 0;
+      }
+   }
+}
+
+int
+main(int ac, char **av)
+{
+   float fogcolor[4] = { 0.7, 0.7, 0.7, 1.0 };
+
+   fprintf(stderr,
+	   "IperS V1.0\nWritten by David Bucciarelli (tech.hmw@plus.it)\n");
+
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(WIDTH, HEIGHT);
+   glutInit(&ac, av);
+
+   glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
+
+   if (!(win = glutCreateWindow("IperS"))) {
+      fprintf(stderr, "Error, couldn't open window\n");
+      exit(-1);
+   }
+
+   reshape(WIDTH, HEIGHT);
+
+   glShadeModel(GL_SMOOTH);
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_CULL_FACE);
+   glEnable(GL_TEXTURE_2D);
+
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+   glEnable(GL_FOG);
+   glFogi(GL_FOG_MODE, GL_EXP2);
+   glFogfv(GL_FOG_COLOR, fogcolor);
+
+   glFogf(GL_FOG_DENSITY, 0.006);
+
+   glHint(GL_FOG_HINT, GL_NICEST);
+
+   inittextures();
+   initdlists();
+   initlight();
+
+   glClearColor(fogcolor[0], fogcolor[1], fogcolor[2], fogcolor[3]);
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   calcposobs();
+
+   glutReshapeFunc(reshape);
+   glutDisplayFunc(draw);
+   glutKeyboardFunc(key);
+   glutSpecialFunc(special);
+   glutIdleFunc(draw);
+
+   glutMainLoop();
+
+   return 0;
+}
diff --git a/progs/demos/isosurf.c b/progs/demos/isosurf.c
new file mode 100644
index 000000000..0710bc604
--- /dev/null
+++ b/progs/demos/isosurf.c
@@ -0,0 +1,1125 @@
+
+/*
+ * Display an isosurface of 3-D wind speed volume.
+ *
+ * Command line options:
+ *    -info      print GL implementation information
+ *
+ * Brian Paul  This file in public domain.
+ */
+
+
+/* Keys:
+ * =====
+ *
+ *   - Arrow keys to rotate
+ *   - 's' toggles smooth shading
+ *   - 'l' toggles lighting
+ *   - 'f' toggles fog
+ *   - 'I' and 'i' zoom in and out
+ *   - 'c' toggles a user clip plane
+ *   - 'm' toggles colorful materials in GL_TRIANGLES modes.
+ *   - '+' and '-' move the user clip plane
+ *
+ * Other options are available via the popup menu.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#ifdef _WIN32
+#include <windows.h>
+#undef CLIP_MASK
+#endif
+#define GL_GLEXT_PROTOTYPES
+#include "GL/glut.h"
+
+#include "readtex.h"
+#define TEXTURE_FILE "../images/reflect.rgb"
+
+#define LIT		0x00000001
+#define UNLIT		0x00000002
+#define REFLECT		0x00000004
+#define POINT_FILTER	0x00000008
+#define LINEAR_FILTER	0x00000010
+#define GLVERTEX	0x00000020
+#define DRAW_ELTS	0x00000040 
+#define DRAW_ARRAYS	0x00000080 
+#define ARRAY_ELT	0x00000100
+#define LOCKED	        0x00000200
+#define UNLOCKED	0x00000400 
+#define IMMEDIATE	0x00000800
+#define DISPLAYLIST	0x00001000
+#define SHADE_SMOOTH	0x00002000
+#define SHADE_FLAT	0x00004000
+#define TRIANGLES	0x00008000
+#define STRIPS		0x00010000
+#define POINTS		0x00020000
+#define USER_CLIP	0x00040000
+#define NO_USER_CLIP	0x00080000
+#define MATERIALS	0x00100000
+#define NO_MATERIALS	0x00200000
+#define FOG		0x00400000
+#define NO_FOG		0x00800000
+#define QUIT		0x01000000
+#define GLINFO		0x02000000
+#define STIPPLE		0x04000000
+#define NO_STIPPLE	0x08000000
+#define POLYGON_FILL	0x10000000
+#define POLYGON_LINE	0x20000000
+
+#define LIGHT_MASK		(LIT|UNLIT|REFLECT)
+#define FILTER_MASK		(POINT_FILTER|LINEAR_FILTER)
+#define RENDER_STYLE_MASK	(GLVERTEX|DRAW_ARRAYS|DRAW_ELTS|ARRAY_ELT)
+#define DLIST_MASK		(IMMEDIATE|DISPLAYLIST)
+#define LOCK_MASK		(LOCKED|UNLOCKED)
+#define MATERIAL_MASK		(MATERIALS|NO_MATERIALS)
+#define PRIMITIVE_MASK		(TRIANGLES|STRIPS|POINTS)
+#define CLIP_MASK		(USER_CLIP|NO_USER_CLIP)
+#define SHADE_MASK		(SHADE_SMOOTH|SHADE_FLAT)
+#define FOG_MASK		(FOG|NO_FOG)
+#define STIPPLE_MASK		(STIPPLE|NO_STIPPLE)
+#define POLYGON_MASK		(POLYGON_FILL|POLYGON_LINE)
+
+#define MAXVERTS 10000
+static GLint maxverts = MAXVERTS;
+static float data[MAXVERTS][6];
+static float compressed_data[MAXVERTS][6];
+static float expanded_data[MAXVERTS*3][6];
+static GLuint indices[MAXVERTS];
+static GLuint tri_indices[MAXVERTS*3];
+static GLuint strip_indices[MAXVERTS];
+static GLfloat col[100][4];
+static GLint numverts, num_tri_verts, numuniq;
+
+static GLfloat xrot;
+static GLfloat yrot;
+static GLfloat dist;
+static GLint state, allowed = ~0;
+static GLboolean doubleBuffer = GL_TRUE;
+static GLdouble plane[4];
+static GLuint surf1, dlist_state;
+
+static GLboolean PrintInfo = GL_FALSE;
+
+
+static GLubyte halftone[] = {
+   0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA,
+   0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
+   0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA,
+   0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
+   0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA,
+   0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
+   0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA,
+   0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
+   0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA,
+   0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
+   0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55};
+
+
+static void read_surface( char *filename )
+{
+   FILE *f;
+
+   f = fopen(filename,"r");
+   if (!f) {
+      printf("couldn't read %s\n", filename);
+      exit(1);
+   }
+
+   numverts = 0;
+   while (!feof(f) && numverts<maxverts) {
+      fscanf( f, "%f %f %f  %f %f %f",
+	      &data[numverts][0], &data[numverts][1], &data[numverts][2],
+	      &data[numverts][3], &data[numverts][4], &data[numverts][5] );
+      numverts++;
+   }
+   numverts--;
+
+   printf("%d vertices, %d triangles\n", numverts, numverts-2);
+   fclose(f);
+}
+
+
+
+static void print_flags( const char *msg, GLuint flags ) 
+{
+   fprintf(stderr, 
+	   "%s (0x%x): %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
+	   msg, flags,
+	   (flags & GLVERTEX) ? "glVertex, " : "",
+	   (flags & DRAW_ARRAYS) ? "glDrawArrays, " : "",
+	   (flags & DRAW_ELTS) ? "glDrawElements, " : "",
+	   (flags & ARRAY_ELT) ? "glArrayElement, " : "",
+	   (flags & LOCKED) ? "locked arrays, " : "",
+	   (flags & TRIANGLES) ? "GL_TRIANGLES, " : "",
+	   (flags & STRIPS) ? "GL_TRIANGLE_STRIP, " : "",
+	   (flags & POINTS) ? "GL_POINTS, " : "",
+	   (flags & DISPLAYLIST) ? "as a displaylist, " : "",
+	   (flags & LIT) ? "lit, " : "",
+	   (flags & UNLIT) ? "unlit, " : "",
+	   (flags & REFLECT) ? "reflect, " : "",
+	   (flags & SHADE_FLAT) ? "flat-shaded, " : "",
+	   (flags & USER_CLIP) ? "user_clip, " : "",
+	   (flags & MATERIALS) ? "materials, " : "",
+	   (flags & FOG) ? "fog, " : "",
+	   (flags & STIPPLE) ? "stipple, " : "",
+	   (flags & POLYGON_LINE) ? "polygon mode line, " : "");
+}
+
+
+
+struct data_idx {
+   float *data;
+   int idx;
+   int uniq_idx;
+};
+
+
+#define COMPARE_FUNC( AXIS )                            \
+static int compare_axis_##AXIS( const void *a, const void *b )	\
+{							\
+   float t = ( (*(struct data_idx *)a).data[AXIS] -	\
+	       (*(struct data_idx *)b).data[AXIS] );	\
+   							\
+   if (t < 0) return -1;				\
+   if (t > 0) return 1;					\
+   return 0;						\
+}
+
+COMPARE_FUNC(0)
+COMPARE_FUNC(1)
+COMPARE_FUNC(2)
+COMPARE_FUNC(3)
+COMPARE_FUNC(4)
+COMPARE_FUNC(5)
+COMPARE_FUNC(6)
+
+int (*(compare[7]))( const void *a, const void *b ) =
+{
+   compare_axis_0,
+   compare_axis_1,
+   compare_axis_2,
+   compare_axis_3,
+   compare_axis_4,
+   compare_axis_5,
+   compare_axis_6,
+};
+
+
+#define VEC_ELT(f, s, i)  (float *)(((char *)f) + s * i)
+
+static int sort_axis( int axis,
+		      int vec_size,
+		      int vec_stride,
+		      struct data_idx *indices,
+		      int start,
+		      int finish,
+		      float *out,
+		      int uniq,
+		      const float fudge )
+{
+   int i;
+
+   if (finish-start > 2)
+   {
+      qsort( indices+start, finish-start, sizeof(*indices), compare[axis] );
+   }
+   else if (indices[start].data[axis] > indices[start+1].data[axis])
+   {
+      struct data_idx tmp = indices[start];
+      indices[start] = indices[start+1];
+      indices[start+1] = tmp;
+   }
+
+   if (axis == vec_size-1) {
+      for (i = start ; i < finish ; ) {
+	 float max = indices[i].data[axis] + fudge;
+	 float *dest = VEC_ELT(out, vec_stride, uniq);
+	 int j;
+
+	 for (j = 0 ; j < vec_size ; j++)
+	    dest[j] = indices[i].data[j];
+
+	 for ( ; i < finish && max >= indices[i].data[axis]; i++)
+	    indices[i].uniq_idx = uniq;
+
+	 uniq++;
+      }
+   } else {
+      for (i = start ; i < finish ; ) {
+	 int j = i + 1;
+	 float max = indices[i].data[axis] + fudge;
+	 while (j < finish && max >= indices[j].data[axis]) j++;
+	 if (j == i+1) {
+	    float *dest = VEC_ELT(out, vec_stride, uniq);
+	    int k;
+
+	    indices[i].uniq_idx = uniq;
+
+	    for (k = 0 ; k < vec_size ; k++)
+	       dest[k] = indices[i].data[k];
+
+	    uniq++;
+	 } else {
+	    uniq = sort_axis( axis+1, vec_size, vec_stride,
+			      indices, i, j, out, uniq, fudge );
+	 }
+	 i = j;
+      }
+   }
+
+   return uniq;
+}
+
+
+static void extract_indices1( const struct data_idx *in, unsigned int *out,
+			      int n )
+{
+   int i;
+   for ( i = 0 ; i < n ; i++ ) {
+      out[in[i].idx] = in[i].uniq_idx;
+   }
+}
+
+
+static void compactify_arrays(void)
+{
+   int i;
+   struct data_idx *ind;
+
+   ind = (struct data_idx *) malloc( sizeof(struct data_idx) * numverts );
+
+   for (i = 0 ; i < numverts ; i++) {
+      ind[i].idx = i;
+      ind[i].data = data[i];
+   }
+
+   numuniq = sort_axis(0,
+		       sizeof(compressed_data[0])/sizeof(float),
+		       sizeof(compressed_data[0]),
+		       ind,
+		       0,
+		       numverts,
+		       (float *)compressed_data,
+		       0,
+		       1e-6);
+
+   printf("Nr unique vertex/normal pairs: %d\n", numuniq);
+
+   extract_indices1( ind, indices, numverts );
+   free( ind );
+}
+
+static void expand_arrays(void) 
+{
+   int i;
+   int parity = 0;
+   for (i = 2 ; i < numverts ; i++, parity ^= 1) {
+      int v0 = i-2+parity;
+      int v1 = i-1-parity;
+      int v2 = i;
+      memcpy( expanded_data[(i-2)*3+0], data[v0], sizeof(data[0]) );
+      memcpy( expanded_data[(i-2)*3+1], data[v1], sizeof(data[0]) );
+      memcpy( expanded_data[(i-2)*3+2], data[v2], sizeof(data[0]) );
+   }
+}
+
+static float myrand( float max )
+{
+   return max*rand()/(RAND_MAX+1.0);
+}
+
+
+static void make_tri_indices( void )
+{
+   unsigned int *v = tri_indices;
+   unsigned int parity = 0;
+   int i, j;
+
+   for (j=2;j<numverts;j++,parity^=1) {
+      if (parity) {
+	 *v++ = indices[j-1];
+	 *v++ = indices[j-2];
+	 *v++ = indices[j];
+      } else {
+	 *v++ = indices[j-2];
+	 *v++ = indices[j-1];
+	 *v++ = indices[j];
+      }
+   }
+
+   num_tri_verts = v - tri_indices;
+   printf("num_tri_verts: %d\n", num_tri_verts);
+
+   for (i = j = 0 ; i < num_tri_verts ; i += 600, j++) {
+      col[j][3] = 1;
+      col[j][2] = myrand(1);
+      col[j][1] = myrand(1);
+      col[j][0] = myrand(1);
+   }
+
+   for (i = 0; i < numverts ; i++)
+      strip_indices[i] = i;
+}
+
+#define MIN(x,y) (x < y) ? x : y
+
+static void draw_surface( unsigned int with_state )
+{
+   GLint i, j;
+   
+   if (with_state & DISPLAYLIST) {
+      if ((with_state & (RENDER_STYLE_MASK|PRIMITIVE_MASK|MATERIAL_MASK)) != 
+	  dlist_state) {
+	 /* 
+	  */
+	 fprintf(stderr, "rebuilding displaylist\n");
+
+	 if (dlist_state)
+	    glDeleteLists( surf1, 1 );
+
+	 dlist_state = with_state & (RENDER_STYLE_MASK|PRIMITIVE_MASK|
+				     MATERIAL_MASK);
+	 surf1 = glGenLists(1);
+	 glNewList(surf1, GL_COMPILE);
+	 draw_surface( dlist_state );
+	 glEndList();
+      }
+
+      glCallList( surf1 );
+      return;
+   }
+
+   switch (with_state & (RENDER_STYLE_MASK|PRIMITIVE_MASK)) {
+#ifdef GL_EXT_vertex_array
+
+   case (DRAW_ELTS|TRIANGLES):
+      if (with_state & MATERIALS) {
+	 for (j = i = 0 ; i < num_tri_verts ; i += 600, j++) {
+	    GLuint nr = MIN(num_tri_verts-i, 600);
+	    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, col[j]);
+	    glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, col[j]);
+	    glDrawElements( GL_TRIANGLES, nr, GL_UNSIGNED_INT, tri_indices+i );
+	 }
+      } else {
+	 glDrawElements( GL_TRIANGLES, num_tri_verts, GL_UNSIGNED_INT,
+			 tri_indices );
+      }
+      break;
+
+   case (DRAW_ARRAYS|TRIANGLES):
+      glDrawArraysEXT( GL_TRIANGLES, 0, (numverts-2)*3 );
+      break;
+
+   case (ARRAY_ELT|TRIANGLES):
+      if (with_state & MATERIALS) {
+	 for (j = i = 0 ; i < num_tri_verts ; i += 600, j++) {
+	    GLuint nr = MIN(num_tri_verts-i, 600);
+	    GLuint k;
+	    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, col[j]);
+	    glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, col[j]);
+	    glBegin( GL_TRIANGLES );
+	    for (k = 0 ; k < nr ; k++)
+	       glArrayElement( tri_indices[i+k] );
+	    glEnd();
+	 }
+      } else {
+	 glBegin( GL_TRIANGLES );
+	 for (i = 0 ; i < num_tri_verts ; i++)
+	    glArrayElement( tri_indices[i] );
+
+	 glEnd();
+      }
+      break;
+
+
+      /* Uses the original arrays (including duplicate elements):
+       */
+   case (DRAW_ARRAYS|STRIPS):
+      glDrawArraysEXT( GL_TRIANGLE_STRIP, 0, numverts );
+      break;
+   case (DRAW_ELTS|STRIPS):
+      glDrawElements( GL_TRIANGLE_STRIP, numverts,
+		      GL_UNSIGNED_INT, strip_indices );
+      break;
+
+      /* Uses the original arrays (including duplicate elements):
+       */
+   case (ARRAY_ELT|STRIPS):
+      glBegin( GL_TRIANGLE_STRIP );
+      for (i = 0 ; i < numverts ; i++)
+	 glArrayElement( i );
+      glEnd();
+      break;
+
+   case (DRAW_ARRAYS|POINTS):
+      glDrawArraysEXT( GL_POINTS, 0, numuniq );
+      break;
+   case (DRAW_ELTS|POINTS):
+      /* can use numuniq with strip_indices as strip_indices[i] == i.
+       */
+      glDrawElements( GL_POINTS, numuniq, 
+		      GL_UNSIGNED_INT, strip_indices );
+      break;
+   case (ARRAY_ELT|POINTS):
+      /* just emit each unique element once:
+       */
+      glBegin( GL_POINTS );
+      for (i = 0 ; i < numuniq ; i++)
+	 glArrayElement( i );
+      glEnd();
+      break;
+#endif
+
+   case (GLVERTEX|TRIANGLES):
+      if (with_state & MATERIALS) {
+	 for (j = i = 0 ; i < num_tri_verts ; i += 600, j++) {
+	    GLuint nr = MIN(num_tri_verts-i, 600);
+	    GLuint k;
+	    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, col[j]);
+	    glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, col[j]);
+	    glBegin( GL_TRIANGLES );
+	    for (k = 0 ; k < nr ; k++) {
+	       glNormal3fv( &compressed_data[tri_indices[i+k]][3] );
+	       glVertex3fv( &compressed_data[tri_indices[i+k]][0] );
+	    }
+	    glEnd();
+	 }
+      } else {
+	 glBegin( GL_TRIANGLES );
+	 for (i = 0 ; i < num_tri_verts ; i++) {
+	    glNormal3fv( &compressed_data[tri_indices[i]][3] );
+	    glVertex3fv( &compressed_data[tri_indices[i]][0] );
+	 }
+	 glEnd();
+      }
+      break;
+
+   case (GLVERTEX|POINTS):
+      /* Renders all points, but not in strip order...  Shouldn't be a
+       * problem, but people may be confused as to why points are so
+       * much faster in this demo...  And why cva doesn't help them...
+       */
+      glBegin( GL_POINTS );
+      for ( i = 0 ; i < numuniq ; i++ ) {
+         glNormal3fv( &compressed_data[i][3] );
+         glVertex3fv( &compressed_data[i][0] );
+      }
+      glEnd();
+      break;
+
+   case (GLVERTEX|STRIPS):
+      glBegin( GL_TRIANGLE_STRIP );
+      for (i=0;i<numverts;i++) {
+         glNormal3fv( &data[i][3] );
+         glVertex3fv( &data[i][0] );
+      }
+      glEnd();
+      break;
+
+   default:
+      fprintf(stderr, "unimplemented mode %x...\n", 
+	      (with_state & (RENDER_STYLE_MASK|PRIMITIVE_MASK)));
+      break;
+   }
+}
+
+
+
+static void Display(void)
+{
+    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+    draw_surface( state );
+    glFlush();
+    if (doubleBuffer) glutSwapBuffers();
+}
+
+
+/* KW: only do this when necessary, so CVA can re-use results.
+ */
+static void set_matrix( void )
+{
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, dist );
+   glRotatef( yrot, 0.0, 1.0, 0.0 );
+   glRotatef( xrot, 1.0, 0.0, 0.0 );
+}
+
+static void Benchmark( float xdiff, float ydiff )
+{
+   int startTime, endTime;
+   int draws;
+   double seconds, fps, triPerSecond;
+
+   printf("Benchmarking...\n");
+
+   draws = 0;
+   startTime = glutGet(GLUT_ELAPSED_TIME);
+   xrot = 0.0;
+   do {
+      xrot += xdiff;
+      yrot += ydiff;
+      set_matrix();
+      Display();
+      draws++;
+      endTime = glutGet(GLUT_ELAPSED_TIME);
+   } while (endTime - startTime < 5000);   /* 5 seconds */
+
+   /* Results */
+   seconds = (double) (endTime - startTime) / 1000.0;
+   triPerSecond = (numverts - 2) * draws / seconds;
+   fps = draws / seconds;
+   printf("Result:  triangles/sec: %g  fps: %g\n", triPerSecond, fps);
+}
+
+
+static void InitMaterials(void)
+{
+    static float ambient[] = {0.1, 0.1, 0.1, 1.0};
+    static float diffuse[] = {0.5, 1.0, 1.0, 1.0};
+    static float position0[] = {0.0, 0.0, 20.0, 0.0};
+    static float position1[] = {0.0, 0.0, -20.0, 0.0};
+    static float front_mat_shininess[] = {60.0};
+    static float front_mat_specular[] = {0.2, 0.2, 0.2, 1.0};
+    static float front_mat_diffuse[] = {0.5, 0.28, 0.38, 1.0};
+    /*
+    static float back_mat_shininess[] = {60.0};
+    static float back_mat_specular[] = {0.5, 0.5, 0.2, 1.0};
+    static float back_mat_diffuse[] = {1.0, 1.0, 0.2, 1.0};
+    */
+    static float lmodel_ambient[] = {1.0, 1.0, 1.0, 1.0};
+    static float lmodel_twoside[] = {GL_FALSE};
+
+    glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
+    glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
+    glLightfv(GL_LIGHT0, GL_POSITION, position0);
+    glEnable(GL_LIGHT0);
+
+    glLightfv(GL_LIGHT1, GL_AMBIENT, ambient);
+    glLightfv(GL_LIGHT1, GL_DIFFUSE, diffuse);
+    glLightfv(GL_LIGHT1, GL_POSITION, position1);
+    glEnable(GL_LIGHT1);
+
+    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
+    glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
+
+    glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, front_mat_shininess);
+    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, front_mat_specular);
+    glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, front_mat_diffuse);
+
+    glPolygonStipple (halftone);
+}
+
+
+
+#define UPDATE(o,n,mask) (o&=~mask, o|=n&mask)
+#define CHANGED(o,n,mask) ((n&mask) && (n&mask) != (o&mask) )
+
+static void ModeMenu(int m)
+{
+   m &= allowed;
+
+   if (!m) return;
+
+   if (m==QUIT)
+      exit(0);
+
+   if (m==GLINFO) {
+      printf("GL_VERSION: %s\n", (char *) glGetString(GL_VERSION));
+      printf("GL_EXTENSIONS: %s\n", (char *) glGetString(GL_EXTENSIONS));
+      printf("GL_RENDERER: %s\n", (char *) glGetString(GL_RENDERER));
+      return;
+   }
+
+   if (CHANGED(state, m, FILTER_MASK)) {
+      UPDATE(state, m, FILTER_MASK);
+      if (m & LINEAR_FILTER) {
+	 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+      } else {
+	 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+      }
+   }
+
+   if (CHANGED(state, m, LIGHT_MASK)) {
+      UPDATE(state, m, LIGHT_MASK);
+      if (m & LIT) {
+	 glEnable(GL_LIGHTING);
+	 glDisable(GL_TEXTURE_GEN_S);
+	 glDisable(GL_TEXTURE_GEN_T);
+	 glDisable(GL_TEXTURE_2D);
+      }
+      else if (m & UNLIT) {
+	 glDisable(GL_LIGHTING);
+	 glDisable(GL_TEXTURE_GEN_S);
+	 glDisable(GL_TEXTURE_GEN_T);
+	 glDisable(GL_TEXTURE_2D);
+      }
+      else if (m & REFLECT) {
+	 glDisable(GL_LIGHTING);
+	 glEnable(GL_TEXTURE_GEN_S);
+	 glEnable(GL_TEXTURE_GEN_T);
+	 glEnable(GL_TEXTURE_2D);
+      }
+   }
+
+   if (CHANGED(state, m, SHADE_MASK)) {
+      UPDATE(state, m, SHADE_MASK);
+      if (m & SHADE_SMOOTH)
+	 glShadeModel(GL_SMOOTH);
+      else
+	 glShadeModel(GL_FLAT);
+   }
+
+
+   if (CHANGED(state, m, CLIP_MASK)) {
+      UPDATE(state, m, CLIP_MASK);
+      if (m & USER_CLIP) {
+	 glEnable(GL_CLIP_PLANE0);
+      } else {
+	 glDisable(GL_CLIP_PLANE0);
+      }
+   }
+
+   if (CHANGED(state, m, FOG_MASK)) {
+      UPDATE(state, m, FOG_MASK);
+      if (m & FOG) {
+	 glEnable(GL_FOG);
+      }
+      else {
+	 glDisable(GL_FOG);
+      }
+   }
+
+   if (CHANGED(state, m, STIPPLE_MASK)) {
+      UPDATE(state, m, STIPPLE_MASK);
+      if (m & STIPPLE) {
+	 glEnable(GL_POLYGON_STIPPLE);
+      }
+      else {
+	 glDisable(GL_POLYGON_STIPPLE);
+      }
+   }
+
+   if (CHANGED(state, m, POLYGON_MASK)) {
+      UPDATE(state, m, POLYGON_MASK);
+      if (m & POLYGON_FILL) {
+	 glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+      }
+      else {
+	 glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+      }
+   }
+
+#ifdef GL_EXT_vertex_array
+   if (CHANGED(state, m, (LOCK_MASK|RENDER_STYLE_MASK|PRIMITIVE_MASK)))
+   {
+      if (m & (PRIMITIVE_MASK)) {
+	 UPDATE(state, m, (PRIMITIVE_MASK));
+      }
+
+      if (m & (RENDER_STYLE_MASK)) {
+	 UPDATE(state, m, (RENDER_STYLE_MASK));
+      }
+
+      if (m & LOCK_MASK) {
+	 UPDATE(state, m, (LOCK_MASK));
+      }
+
+
+      print_flags("primitive", state & PRIMITIVE_MASK);
+      print_flags("render style", state & RENDER_STYLE_MASK);
+
+      if ((state & PRIMITIVE_MASK) != STRIPS &&
+	  ((state & RENDER_STYLE_MASK) == DRAW_ELTS ||
+	   (state & RENDER_STYLE_MASK) == ARRAY_ELT || 
+	   (state & PRIMITIVE_MASK) == POINTS))
+      {
+	 fprintf(stderr, "enabling small arrays\n");
+	 /* Rendering any primitive with draw-element/array-element
+	  *  --> Can't do strips here as ordering has been lost in
+	  *  compaction process...
+	  */
+	 glVertexPointerEXT( 3, GL_FLOAT, sizeof(data[0]), numuniq,
+			     compressed_data );
+	 glNormalPointerEXT( GL_FLOAT, sizeof(data[0]), numuniq,
+			     &compressed_data[0][3]);
+#ifdef GL_EXT_compiled_vertex_array
+	 if (allowed & LOCKED) {
+	    if (state & LOCKED) {
+	       glLockArraysEXT( 0, numuniq );
+	    } else {
+	       glUnlockArraysEXT();
+	    }
+	 }
+#endif
+      }
+      else if ((state & PRIMITIVE_MASK) == TRIANGLES &&
+	       (state & RENDER_STYLE_MASK) == DRAW_ARRAYS) {
+	 fprintf(stderr, "enabling big arrays\n");
+	 /* Only get here for TRIANGLES and drawarrays
+	  */
+	 glVertexPointerEXT( 3, GL_FLOAT, sizeof(data[0]), (numverts-2) * 3,
+			     expanded_data );
+	 glNormalPointerEXT( GL_FLOAT, sizeof(data[0]), (numverts-2) * 3,
+			     &expanded_data[0][3]);
+
+#ifdef GL_EXT_compiled_vertex_array
+	 if (allowed & LOCKED) {
+	    if (state & LOCKED) {
+	       glLockArraysEXT( 0, (numverts-2)*3 );
+	    } else {
+	       glUnlockArraysEXT();
+	    }
+	 }
+#endif
+      }
+      else {
+	 fprintf(stderr, "enabling normal arrays\n");
+	 glVertexPointerEXT( 3, GL_FLOAT, sizeof(data[0]), numverts, data );
+	 glNormalPointerEXT( GL_FLOAT, sizeof(data[0]), numverts, &data[0][3]);
+#ifdef GL_EXT_compiled_vertex_array
+	 if (allowed & LOCKED) {
+	    if (state & LOCKED) {
+	       glLockArraysEXT( 0, numverts );
+	    } else {
+	       glUnlockArraysEXT();
+	    }
+	 }
+#endif
+      }
+
+   }
+#endif
+
+
+   if (m & DLIST_MASK) {
+      UPDATE(state, m, DLIST_MASK);
+   }
+
+   if (m & MATERIAL_MASK) {
+      UPDATE(state, m, MATERIAL_MASK);
+   }
+
+   print_flags("new flags", state);
+
+   glutPostRedisplay();
+}
+
+
+
+static void Init(int argc, char *argv[])
+{
+   GLfloat fogColor[4] = {0.5,1.0,0.5,1.0};
+
+   xrot = 0;
+   yrot = 0;
+   dist = -6;
+   plane[0] = 1.0;
+   plane[1] = 0.0;
+   plane[2] = -1.0;
+   plane[3] = 0.0;
+
+   glClearColor(0.0, 0.0, 1.0, 0.0);
+   glEnable( GL_DEPTH_TEST );
+   glEnable( GL_VERTEX_ARRAY_EXT );
+   glEnable( GL_NORMAL_ARRAY_EXT );
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 5, 25 );
+
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glClipPlane(GL_CLIP_PLANE0, plane);
+
+   InitMaterials();
+
+   set_matrix();
+
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+   glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
+
+   glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
+   glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
+
+
+   /* Green fog is easy to see */
+   glFogi(GL_FOG_MODE,GL_EXP2);
+   glFogfv(GL_FOG_COLOR,fogColor);
+   glFogf(GL_FOG_DENSITY,0.15);
+   glHint(GL_FOG_HINT,GL_DONT_CARE);
+
+   {
+      static int firsttime = 1;
+      if (firsttime) {
+	 firsttime = 0;
+	 compactify_arrays();
+	 expand_arrays();
+	 make_tri_indices();
+
+	 if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
+	    printf("Error: couldn't load texture image\n");
+	    exit(1);
+	 }
+      }
+   }
+
+   ModeMenu(SHADE_SMOOTH|
+	    LIT|
+	    POINT_FILTER|
+	    NO_USER_CLIP|
+	    NO_MATERIALS|
+	    NO_FOG|
+	    NO_STIPPLE|
+	    IMMEDIATE|
+	    STRIPS|
+	    UNLOCKED|
+	    GLVERTEX);
+
+   if (PrintInfo) {
+      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+   }
+}
+
+
+
+static void Reshape(int width, int height)
+{
+    glViewport(0, 0, (GLint)width, (GLint)height);
+}
+
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+   case 27:
+      exit(0);
+   case 'f':
+      ModeMenu((state ^ FOG_MASK) & FOG_MASK);
+      break;
+   case 's':
+      ModeMenu((state ^ SHADE_MASK) & SHADE_MASK);
+      break;
+   case 't':
+      ModeMenu((state ^ STIPPLE_MASK) & STIPPLE_MASK);
+      break;
+   case 'l':
+      ModeMenu((state ^ LIGHT_MASK) & (LIT|UNLIT));
+      break;
+   case 'm':
+      ModeMenu((state ^ MATERIAL_MASK) & MATERIAL_MASK);
+      break;
+   case 'c':
+      ModeMenu((state ^ CLIP_MASK) & CLIP_MASK);
+      break;
+   case 'v':
+      ModeMenu((LOCKED|IMMEDIATE|DRAW_ELTS|TRIANGLES) & allowed);
+      break;
+   case 'V':
+      ModeMenu(UNLOCKED|IMMEDIATE|GLVERTEX|STRIPS);
+      break;
+   case 'b':
+      Benchmark(5.0, 0);
+      break;
+   case 'B':
+      Benchmark(0, 5.0);
+      break;
+   case 'i':
+      dist += .25;
+      set_matrix();
+      glutPostRedisplay();
+      break;
+   case 'I':
+      dist -= .25;
+      set_matrix();
+      glutPostRedisplay();
+      break;
+   case '-':
+   case '_':
+      plane[3] += 2.0;
+      glMatrixMode(GL_MODELVIEW);
+      glLoadIdentity();
+      glClipPlane(GL_CLIP_PLANE0, plane);
+      set_matrix();
+      glutPostRedisplay();
+      break;
+   case '+':
+   case '=':
+      plane[3] -= 2.0;
+      glMatrixMode(GL_MODELVIEW);
+      glLoadIdentity();
+      glClipPlane(GL_CLIP_PLANE0, plane);
+      set_matrix();
+      glutPostRedisplay();
+      break;
+   case ' ':
+      Init(0,0);
+      break;
+   }
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+   case GLUT_KEY_LEFT:
+      yrot -= 15.0;
+      break;
+   case GLUT_KEY_RIGHT:
+      yrot += 15.0;
+      break;
+   case GLUT_KEY_UP:
+      xrot += 15.0;
+      break;
+   case GLUT_KEY_DOWN:
+      xrot -= 15.0;
+      break;
+   default:
+      return;
+   }
+   set_matrix();
+   glutPostRedisplay();
+}
+
+
+
+static GLint Args(int argc, char **argv)
+{
+   GLint i;
+   GLint mode = 0;
+
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-sb") == 0) {
+         doubleBuffer = GL_FALSE;
+      }
+      else if (strcmp(argv[i], "-db") == 0) {
+         doubleBuffer = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-info") == 0) {
+         PrintInfo = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-10") == 0) {
+         maxverts = 10;
+      }
+      else if (strcmp(argv[i], "-100") == 0) {
+	 maxverts = 100;
+      }
+      else if (strcmp(argv[i], "-1000") == 0) {
+	 maxverts = 1000;
+      }
+      else {
+         printf("%s (Bad option).\n", argv[i]);
+	 return QUIT;
+      }
+   }
+
+   return mode;
+}
+
+int main(int argc, char **argv)
+{
+   GLenum type;
+   char *extensions;
+
+   GLuint arg_mode = Args(argc, argv);
+
+   if (arg_mode & QUIT)
+      exit(0);
+
+   read_surface( "isosurf.dat" );
+
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(400, 400);
+
+   type = GLUT_DEPTH;
+   type |= GLUT_RGB;
+   type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
+   glutInitDisplayMode(type);
+
+   if (glutCreateWindow("Isosurface") <= 0) {
+      exit(0);
+   }
+
+   /* Make sure server supports the vertex array extension */
+   extensions = (char *) glGetString( GL_EXTENSIONS );
+
+   if (!strstr( extensions, "GL_EXT_vertex_array" ))
+   {
+      printf("Vertex arrays not supported by this renderer\n");
+      allowed &= ~(LOCKED|DRAW_ARRAYS|DRAW_ELTS|ARRAY_ELT);
+   }
+   else if (!strstr( extensions, "GL_EXT_compiled_vertex_array" ))
+   {
+      printf("Compiled vertex arrays not supported by this renderer\n");
+      allowed &= ~LOCKED;
+   }
+
+   Init(argc, argv);
+   ModeMenu(arg_mode);
+
+   glutCreateMenu(ModeMenu);
+   glutAddMenuEntry("GL info",               GLINFO);
+   glutAddMenuEntry("", 0);
+   glutAddMenuEntry("Lit",                   LIT);
+   glutAddMenuEntry("Unlit",                 UNLIT);
+   glutAddMenuEntry("Reflect",               REFLECT);
+   glutAddMenuEntry("", 0);
+   glutAddMenuEntry("Smooth",                SHADE_SMOOTH);
+   glutAddMenuEntry("Flat",                  SHADE_FLAT);
+   glutAddMenuEntry("", 0);
+   glutAddMenuEntry("Fog",                   FOG);
+   glutAddMenuEntry("No Fog",                NO_FOG);
+   glutAddMenuEntry("", 0);
+   glutAddMenuEntry("Stipple",               STIPPLE);
+   glutAddMenuEntry("No Stipple",            NO_STIPPLE);
+   glutAddMenuEntry("", 0);
+   glutAddMenuEntry("Polygon Mode Fill",     POLYGON_FILL);
+   glutAddMenuEntry("Polygon Mode Line",     POLYGON_LINE);
+   glutAddMenuEntry("", 0);
+   glutAddMenuEntry("Point Filtered",        POINT_FILTER);
+   glutAddMenuEntry("Linear Filtered",       LINEAR_FILTER);
+   glutAddMenuEntry("", 0);
+   glutAddMenuEntry("GL_TRIANGLES",          TRIANGLES);
+   glutAddMenuEntry("GL_TRIANGLE_STRIPS",    STRIPS);
+   glutAddMenuEntry("GL_POINTS",             POINTS);
+   glutAddMenuEntry("", 0);
+   glutAddMenuEntry("Displaylist",           DISPLAYLIST);
+   glutAddMenuEntry("Immediate",             IMMEDIATE);
+   glutAddMenuEntry("", 0);
+   if (allowed & LOCKED) {
+      glutAddMenuEntry("Locked Arrays (CVA)", LOCKED);
+      glutAddMenuEntry("Unlocked Arrays",     UNLOCKED);
+      glutAddMenuEntry("", 0);
+   }
+   glutAddMenuEntry("glVertex",               GLVERTEX);
+   if (allowed & DRAW_ARRAYS) {
+      glutAddMenuEntry("glDrawElements",      DRAW_ELTS);
+      glutAddMenuEntry("glDrawArrays",	      DRAW_ARRAYS);
+      glutAddMenuEntry("glArrayElement",      ARRAY_ELT);
+   }
+   glutAddMenuEntry("", 0);
+   glutAddMenuEntry("Quit",                   QUIT);
+   glutAttachMenu(GLUT_RIGHT_BUTTON);
+
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutSpecialFunc(SpecialKey);
+   glutDisplayFunc(Display);
+
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/isosurf.dat b/progs/demos/isosurf.dat
new file mode 100644
index 000000000..5cadecdb4
--- /dev/null
+++ b/progs/demos/isosurf.dat
@@ -0,0 +1,7179 @@
+-1.000000 0.050200 0.254800  0.280000 0.504000 0.808000
+-1.000000 0.061400 0.243900  0.248000 0.608000 0.744000
+-0.973900 0.050200 0.243900  0.312000 0.448000 0.832000
+-1.000000 0.100400 0.207000  0.040000 0.608000 0.784000
+-0.950000 0.050200 0.232900  0.312000 0.424000 0.840000
+-0.950000 0.100400 0.204500  0.176000 0.504000 0.840000
+-0.900000 0.050200 0.202100  0.368000 0.256000 0.888000
+-0.900000 0.100400 0.184100  0.296000 0.408000 0.856000
+-0.865600 0.050200 0.182900  0.480000 0.256000 0.832000
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diff --git a/progs/demos/lodbias.c b/progs/demos/lodbias.c
new file mode 100644
index 000000000..a4db22e26
--- /dev/null
+++ b/progs/demos/lodbias.c
@@ -0,0 +1,282 @@
+/*
+ * GL_EXT_texture_lod_bias demo
+ *
+ * Thanks to Michael Vance for implementing this extension in Mesa.
+ *
+ * Brian Paul
+ * 20 March 2000
+ *
+ * Copyright (C) 2000  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <GL/glut.h>
+#include <GL/glext.h>
+
+#include "readtex.h"
+
+#define TEXTURE_FILE "../images/girl.rgb"
+
+static GLfloat Xrot = 0, Yrot = -30, Zrot = 0;
+static GLboolean Anim = GL_TRUE;
+static GLint Bias = 0, BiasStepSign = +1; /* ints avoid fp precision problem */
+static GLint BiasMin = -400, BiasMax = 400;
+
+
+
+static void
+PrintString(const char *s)
+{
+   while (*s) {
+      glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
+      s++;
+   }
+}
+
+static void Idle( void )
+{
+   static int lastTime = 0;
+   int time = glutGet(GLUT_ELAPSED_TIME);
+   int step;
+
+   if (lastTime == 0)
+      lastTime = time;
+   else if (time - lastTime < 10)
+      return;
+
+   step = (time - lastTime) / 10 * BiasStepSign;
+   lastTime = time;
+
+   Bias += step;
+   if (Bias < BiasMin) {
+      Bias = BiasMin;
+      BiasStepSign = +1;
+   }
+   else if (Bias > BiasMax) {
+      Bias = BiasMax;
+      BiasStepSign = -1;
+   }
+
+   glutPostRedisplay();
+}
+
+
+static void Display( void )
+{
+   char str[100];
+
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho(-1, 1, -1, 1, -1, 1);
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   
+   glDisable(GL_TEXTURE_2D);
+   glColor3f(1,1,1);
+   glRasterPos3f(-0.9, -0.9, 0.0);
+   sprintf(str, "Texture LOD Bias = %4.1f", Bias * 0.01);
+   PrintString(str);
+
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -8.0 );
+
+   glPushMatrix();
+   glRotatef(Xrot, 1, 0, 0);
+   glRotatef(Yrot, 0, 1, 0);
+   glRotatef(Zrot, 0, 0, 1);
+
+   glEnable(GL_TEXTURE_2D);
+   glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, 0.01 * Bias);
+
+   glBegin(GL_POLYGON);
+   glTexCoord2f(0, 0);  glVertex2f(-1, -1);
+   glTexCoord2f(2, 0);  glVertex2f( 1, -1);
+   glTexCoord2f(2, 2);  glVertex2f( 1,  1);
+   glTexCoord2f(0, 2);  glVertex2f(-1,  1);
+   glEnd();
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   const GLfloat step = 3.0;
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 'a':
+         Anim = !Anim;
+         if (Anim)
+            glutIdleFunc(Idle);
+         else
+            glutIdleFunc(NULL);
+         break;
+      case 'z':
+         Zrot -= step;
+         break;
+      case 'Z':
+         Zrot += step;
+         break;
+      case 'b':
+         Bias -= 10;
+         break;
+      case 'B':
+         Bias += 10;
+         break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   const GLfloat step = 3.0;
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         Xrot -= step;
+         break;
+      case GLUT_KEY_DOWN:
+         Xrot += step;
+         break;
+      case GLUT_KEY_LEFT:
+         Yrot -= step;
+         break;
+      case GLUT_KEY_RIGHT:
+         Yrot += step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+   GLfloat maxBias;
+
+   if (!glutExtensionSupported("GL_EXT_texture_lod_bias")) {
+      printf("Sorry, GL_EXT_texture_lod_bias not supported by this renderer.\n");
+      exit(1);
+   }
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+   if (glutExtensionSupported("GL_SGIS_generate_mipmap")) {
+      /* test auto mipmap generation */
+      GLint width, height, i;
+      GLenum format;
+      GLubyte *image = LoadRGBImage(TEXTURE_FILE, &width, &height, &format);
+      if (!image) {
+         printf("Error: could not load texture image %s\n", TEXTURE_FILE);
+         exit(1);
+      }
+      /* resize to 256 x 256 */
+      if (width != 256 || height != 256) {
+         GLubyte *newImage = malloc(256 * 256 * 4);
+         gluScaleImage(format, width, height, GL_UNSIGNED_BYTE, image,
+                       256, 256, GL_UNSIGNED_BYTE, newImage);
+         free(image);
+         image = newImage;
+      }
+      printf("Using GL_SGIS_generate_mipmap\n");
+      glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
+      glTexImage2D(GL_TEXTURE_2D, 0, format, 256, 256, 0,
+                   format, GL_UNSIGNED_BYTE, image);
+      free(image);
+
+      /* make sure mipmap was really generated correctly */
+      width = height = 256;
+      for (i = 0; i < 9; i++) {
+         GLint w, h;
+         glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_WIDTH, &w);
+         glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_HEIGHT, &h);
+         printf("Level %d size: %d x %d\n", i, w, h);
+         assert(w == width);
+         assert(h == height);
+         width /= 2;
+         height /= 2;
+      }
+
+   }
+   else if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
+      printf("Error: could not load texture image %s\n", TEXTURE_FILE);
+      exit(1);
+   }
+
+   /* mipmapping required for this extension */
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+   glGetFloatv(GL_MAX_TEXTURE_LOD_BIAS_EXT, &maxBias);
+   printf("LOD bias range: [%g, %g]\n", -maxBias, maxBias);
+   BiasMin = -100 * maxBias;
+   BiasMax =  100 * maxBias;
+
+   /* Since we have (about) 8 mipmap levels, no need to bias beyond
+    * the range [-1, +8].
+    */
+   if (BiasMin < -100)
+      BiasMin = -100;
+   if (BiasMax > 800)
+      BiasMax = 800;
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 350, 350 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+   glutCreateWindow(argv[0]);
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+   if (Anim)
+      glutIdleFunc(Idle);
+   Init();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/morph3d.c b/progs/demos/morph3d.c
new file mode 100644
index 000000000..047d571c7
--- /dev/null
+++ b/progs/demos/morph3d.c
@@ -0,0 +1,886 @@
+
+/*-
+ * morph3d.c - Shows 3D morphing objects
+ *
+ * Converted to GLUT by brianp on 1/1/98
+ *
+ * This program was inspired on a WindowsNT(R)'s screen saver. It was written 
+ * from scratch and it was not based on any other source code. 
+ * 
+ * Porting it to xlock (the final objective of this code since the moment I
+ * decided to create it) was possible by comparing the original Mesa's gear
+ * demo with it's ported version, so thanks for Danny Sung for his indirect
+ * help (look at gear.c in xlock source tree). NOTE: At the moment this code
+ * was sent to Brian Paul for package inclusion, the XLock Version was not
+ * available. In fact, I'll wait it to appear on the next Mesa release (If you
+ * are reading this, it means THIS release) to send it for xlock package 
+ * inclusion). It will probably there be a GLUT version too.
+ *
+ * Thanks goes also to Brian Paul for making it possible and inexpensive
+ * to use OpenGL at home.
+ *
+ * Since I'm not a native english speaker, my apologies for any gramatical
+ * mistake.
+ *
+ * My e-mail addresses are
+ *
+ * vianna@cat.cbpf.br 
+ *         and
+ * marcelo@venus.rdc.puc-rio.br
+ *
+ * Marcelo F. Vianna (Feb-13-1997)
+ */
+
+/*
+This document is VERY incomplete, but tries to describe the mathematics used
+in the program. At this moment it just describes how the polyhedra are 
+generated. On futhurer versions, this document will be probabbly improved.
+
+Since I'm not a native english speaker, my apologies for any gramatical
+mistake.
+
+Marcelo Fernandes Vianna 
+- Undergraduate in Computer Engeneering at Catholic Pontifical University
+- of Rio de Janeiro (PUC-Rio) Brasil.
+- e-mail: vianna@cat.cbpf.br or marcelo@venus.rdc.puc-rio.br
+- Feb-13-1997
+
+POLYHEDRA GENERATION
+
+For the purpose of this program it's not sufficient to know the polyhedra
+vertexes coordinates. Since the morphing algorithm applies a nonlinear 
+transformation over the surfaces (faces) of the polyhedron, each face has
+to be divided into smaller ones. The morphing algorithm needs to transform 
+each vertex of these smaller faces individually. It's a very time consoming
+task.
+
+In order to reduce calculation overload, and since all the macro faces of
+the polyhedron are transformed by the same way, the generation is made by 
+creating only one face of the polyhedron, morphing it and then rotating it
+around the polyhedron center. 
+
+What we need to know is the face radius of the polyhedron (the radius of 
+the inscribed sphere) and the angle between the center of two adjacent 
+faces using the center of the sphere as the angle's vertex.
+
+The face radius of the regular polyhedra are known values which I decided
+to not waste my time calculating. Following is a table of face radius for
+the regular polyhedra with edge length = 1:
+
+    TETRAHEDRON  : 1/(2*sqrt(2))/sqrt(3)
+    CUBE	 : 1/2
+    OCTAHEDRON   : 1/sqrt(6)
+    DODECAHEDRON : T^2 * sqrt((T+2)/5) / 2     -> where T=(sqrt(5)+1)/2
+    ICOSAHEDRON  : (3*sqrt(3)+sqrt(15))/12
+
+I've not found any reference about the mentioned angles, so I needed to
+calculate them, not a trivial task until I figured out how :)
+Curiously these angles are the same for the tetrahedron and octahedron.
+A way to obtain this value is inscribing the tetrahedron inside the cube
+by matching their vertexes. So you'll notice that the remaining unmatched
+vertexes are in the same straight line starting in the cube/tetrahedron
+center and crossing the center of each tetrahedron's face. At this point
+it's easy to obtain the bigger angle of the isosceles triangle formed by
+the center of the cube and two opposite vertexes on the same cube face.
+The edges of this triangle have the following lenghts: sqrt(2) for the base
+and sqrt(3)/2 for the other two other edges. So the angle we want is:
+     +-----------------------------------------------------------+
+     | 2*ARCSIN(sqrt(2)/sqrt(3)) = 109.47122063449069174 degrees |
+     +-----------------------------------------------------------+
+For the cube this angle is obvious, but just for formality it can be
+easily obtained because we also know it's isosceles edge lenghts:
+sqrt(2)/2 for the base and 1/2 for the other two edges. So the angle we 
+want is:
+     +-----------------------------------------------------------+
+     | 2*ARCSIN((sqrt(2)/2)/1)   = 90.000000000000000000 degrees |
+     +-----------------------------------------------------------+
+For the octahedron we use the same idea used for the tetrahedron, but now
+we inscribe the cube inside the octahedron so that all cubes's vertexes
+matches excatly the center of each octahedron's face. It's now clear that
+this angle is the same of the thetrahedron one:
+     +-----------------------------------------------------------+
+     | 2*ARCSIN(sqrt(2)/sqrt(3)) = 109.47122063449069174 degrees |
+     +-----------------------------------------------------------+
+For the dodecahedron it's a little bit harder because it's only relationship
+with the cube is useless to us. So we need to solve the problem by another
+way. The concept of Face radius also exists on 2D polygons with the name
+Edge radius:
+  Edge Radius For Pentagon (ERp)
+  ERp = (1/2)/TAN(36 degrees) * VRp = 0.6881909602355867905
+  (VRp is the pentagon's vertex radio).
+  Face Radius For Dodecahedron
+  FRd = T^2 * sqrt((T+2)/5) / 2 = 1.1135163644116068404
+Why we need ERp? Well, ERp and FRd segments forms a 90 degrees angle, 
+completing this triangle, the lesser angle is a half of the angle we are 
+looking for, so this angle is:
+     +-----------------------------------------------------------+
+     | 2*ARCTAN(ERp/FRd)	 = 63.434948822922009981 degrees |
+     +-----------------------------------------------------------+
+For the icosahedron we can use the same method used for dodecahedron (well
+the method used for dodecahedron may be used for all regular polyhedra)
+  Edge Radius For Triangle (this one is well known: 1/3 of the triangle height)
+  ERt = sin(60)/3 = sqrt(3)/6 = 0.2886751345948128655
+  Face Radius For Icosahedron
+  FRi= (3*sqrt(3)+sqrt(15))/12 = 0.7557613140761707538
+So the angle is:
+     +-----------------------------------------------------------+
+     | 2*ARCTAN(ERt/FRi)	 = 41.810314895778596167 degrees |
+     +-----------------------------------------------------------+
+
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#ifndef _WIN32
+#include <unistd.h>
+#endif
+#include <GL/glut.h>
+#include <math.h>
+#include <string.h>
+
+#define Scale                      0.3
+
+#define VectMul(X1,Y1,Z1,X2,Y2,Z2) (Y1)*(Z2)-(Z1)*(Y2),(Z1)*(X2)-(X1)*(Z2),(X1)*(Y2)-(Y1)*(X2)
+#define sqr(A)                     ((A)*(A))
+
+/* Increasing this values produces better image quality, the price is speed. */
+/* Very low values produces erroneous/incorrect plotting */
+#define tetradivisions             23
+#define cubedivisions              20
+#define octadivisions              21
+#define dodecadivisions            10
+#define icodivisions               15
+
+#define tetraangle                 109.47122063449069174
+#define cubeangle                  90.000000000000000000
+#define octaangle                  109.47122063449069174
+#define dodecaangle                63.434948822922009981
+#define icoangle                   41.810314895778596167
+
+#ifndef Pi
+#define Pi                         3.1415926535897932385
+#endif
+#define SQRT2                      1.4142135623730951455
+#define SQRT3                      1.7320508075688771932
+#define SQRT5                      2.2360679774997898051
+#define SQRT6                      2.4494897427831778813
+#define SQRT15                     3.8729833462074170214
+#define cossec36_2                 0.8506508083520399322
+#define cos72                      0.3090169943749474241
+#define sin72                      0.9510565162951535721
+#define cos36                      0.8090169943749474241
+#define sin36                      0.5877852522924731292
+
+/*************************************************************************/
+
+static int       mono=0;
+static int       smooth=1;
+static GLint     WindH, WindW;
+static GLfloat   step=0;
+static GLfloat   seno;
+static int       object;
+static int       edgedivisions;
+static void      (*draw_object)( void );
+static float     Magnitude;
+static float     *MaterialColor[20];
+
+static float front_shininess[] =   {60.0};
+static float front_specular[]  =   { 0.7, 0.7, 0.7, 1.0 };
+static float ambient[]         =   { 0.0, 0.0, 0.0, 1.0 };
+static float diffuse[]         =   { 1.0, 1.0, 1.0, 1.0 };
+static float position0[]       =   { 1.0, 1.0, 1.0, 0.0 };
+static float position1[]       =   {-1.0,-1.0, 1.0, 0.0 };
+static float lmodel_ambient[]  =   { 0.5, 0.5, 0.5, 1.0 };
+static float lmodel_twoside[]  =   {GL_TRUE};
+
+static float MaterialRed[]     =   { 0.7, 0.0, 0.0, 1.0 };
+static float MaterialGreen[]   =   { 0.1, 0.5, 0.2, 1.0 };
+static float MaterialBlue[]    =   { 0.0, 0.0, 0.7, 1.0 };
+static float MaterialCyan[]    =   { 0.2, 0.5, 0.7, 1.0 };
+static float MaterialYellow[]  =   { 0.7, 0.7, 0.0, 1.0 };
+static float MaterialMagenta[] =   { 0.6, 0.2, 0.5, 1.0 };
+static float MaterialWhite[]   =   { 0.7, 0.7, 0.7, 1.0 };
+static float MaterialGray[]    =   { 0.2, 0.2, 0.2, 1.0 };
+
+#define TRIANGLE(Edge, Amp, Divisions, Z)                                                                        \
+{                                                                                                                \
+  GLfloat   Xf,Yf,Xa,Yb,Xf2,Yf2;                                                                                 \
+  GLfloat   Factor,Factor1,Factor2;                                                                              \
+  GLfloat   VertX,VertY,VertZ,NeiAX,NeiAY,NeiAZ,NeiBX,NeiBY,NeiBZ;                                               \
+  GLfloat   Ax,Ay,Bx;                                                                                            \
+  int       Ri,Ti;                                                                                               \
+  GLfloat   Vr=(Edge)*SQRT3/3;                                                                                   \
+  GLfloat   AmpVr2=(Amp)/sqr(Vr);                                                                                \
+  GLfloat   Zf=(Edge)*(Z);                                                                                       \
+                                                                                                                 \
+  Ax=(Edge)*(+0.5/(Divisions)), Ay=(Edge)*(-SQRT3/(2*Divisions));                                                \
+  Bx=(Edge)*(-0.5/(Divisions));                                                                                  \
+                                                                                                                 \
+  for (Ri=1; Ri<=(Divisions); Ri++) {                                                                            \
+    glBegin(GL_TRIANGLE_STRIP);                                                                                  \
+    for (Ti=0; Ti<Ri; Ti++) {                                                                                    \
+      Xf=(float)(Ri-Ti)*Ax + (float)Ti*Bx;                                                                       \
+      Yf=Vr+(float)(Ri-Ti)*Ay + (float)Ti*Ay;                                                                    \
+      Xa=Xf+0.001; Yb=Yf+0.001;                                                                                  \
+      Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                           \
+      Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                          \
+      Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                          \
+      VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                           \
+      NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                    \
+      NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
+      glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
+      glVertex3f(VertX, VertY, VertZ);                                                                           \
+                                                                                                                 \
+      Xf=(float)(Ri-Ti-1)*Ax + (float)Ti*Bx;                                                                     \
+      Yf=Vr+(float)(Ri-Ti-1)*Ay + (float)Ti*Ay;                                                                  \
+      Xa=Xf+0.001; Yb=Yf+0.001;                                                                                  \
+      Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                           \
+      Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                          \
+      Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                          \
+      VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                           \
+      NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                    \
+      NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
+      glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
+      glVertex3f(VertX, VertY, VertZ);                                                                           \
+                                                                                                                 \
+    }                                                                                                            \
+    Xf=(float)Ri*Bx;                                                                                             \
+    Yf=Vr+(float)Ri*Ay;                                                                                          \
+    Xa=Xf+0.001; Yb=Yf+0.001;                                                                                    \
+    Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                             \
+    Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                            \
+    Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                            \
+    VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                             \
+    NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                      \
+    NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                      \
+    glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                               \
+    glVertex3f(VertX, VertY, VertZ);                                                                             \
+    glEnd();                                                                                                     \
+  }                                                                                                              \
+}
+
+#define SQUARE(Edge, Amp, Divisions, Z)                                                                          \
+{                                                                                                                \
+  int       Xi,Yi;                                                                                               \
+  GLfloat   Xf,Yf,Y,Xf2,Yf2,Y2,Xa,Yb;                                                                            \
+  GLfloat   Factor,Factor1,Factor2;                                                                              \
+  GLfloat   VertX,VertY,VertZ,NeiAX,NeiAY,NeiAZ,NeiBX,NeiBY,NeiBZ;                                               \
+  GLfloat   Zf=(Edge)*(Z);                                                                                       \
+  GLfloat   AmpVr2=(Amp)/sqr((Edge)*SQRT2/2);                                                                    \
+                                                                                                                 \
+  for (Yi=0; Yi<(Divisions); Yi++) {                                                                             \
+    Yf=-((Edge)/2.0) + ((float)Yi)/(Divisions)*(Edge);                                                           \
+    Yf2=sqr(Yf);                                                                                                 \
+    Y=Yf+1.0/(Divisions)*(Edge);                                                                                 \
+    Y2=sqr(Y);                                                                                                   \
+    glBegin(GL_QUAD_STRIP);                                                                                      \
+    for (Xi=0; Xi<=(Divisions); Xi++) {                                                                          \
+      Xf=-((Edge)/2.0) + ((float)Xi)/(Divisions)*(Edge);                                                         \
+      Xf2=sqr(Xf);                                                                                               \
+                                                                                                                 \
+      Xa=Xf+0.001; Yb=Y+0.001;                                                                                   \
+      Factor=1-((Xf2+Y2)*AmpVr2);                                                                                \
+      Factor1=1-((sqr(Xa)+Y2)*AmpVr2);                                                                           \
+      Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                          \
+      VertX=Factor*Xf;        VertY=Factor*Y;         VertZ=Factor*Zf;                                           \
+      NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Y-VertY;  NeiAZ=Factor1*Zf-VertZ;                                    \
+      NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
+      glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
+      glVertex3f(VertX, VertY, VertZ);                                                                           \
+                                                                                                                 \
+      Xa=Xf+0.001; Yb=Yf+0.001;                                                                                  \
+      Factor=1-((Xf2+Yf2)*AmpVr2);                                                                               \
+      Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                          \
+      Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                          \
+      VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                           \
+      NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                    \
+      NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
+      glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
+      glVertex3f(VertX, VertY, VertZ);                                                                           \
+    }                                                                                                            \
+    glEnd();                                                                                                     \
+  }                                                                                                              \
+}
+
+#define PENTAGON(Edge, Amp, Divisions, Z)                                                                        \
+{                                                                                                                \
+  int       Ri,Ti,Fi;                                                                                            \
+  GLfloat   Xf,Yf,Xa,Yb,Xf2,Yf2;                                                                                 \
+  GLfloat   x[6],y[6];                                                                                           \
+  GLfloat   Factor,Factor1,Factor2;                                                                              \
+  GLfloat   VertX,VertY,VertZ,NeiAX,NeiAY,NeiAZ,NeiBX,NeiBY,NeiBZ;                                               \
+  GLfloat   Zf=(Edge)*(Z);                                                                                       \
+  GLfloat   AmpVr2=(Amp)/sqr((Edge)*cossec36_2);                                                                 \
+                                                                                                                 \
+  for(Fi=0;Fi<6;Fi++) {                                                                                          \
+    x[Fi]=-cos( Fi*2*Pi/5 + Pi/10 )/(Divisions)*cossec36_2*(Edge);                                                \
+    y[Fi]=sin( Fi*2*Pi/5 + Pi/10 )/(Divisions)*cossec36_2*(Edge);                                                \
+  }                                                                                                              \
+                                                                                                                 \
+  for (Ri=1; Ri<=(Divisions); Ri++) {                                                                            \
+    for (Fi=0; Fi<5; Fi++) {                                                                                     \
+      glBegin(GL_TRIANGLE_STRIP);                                                                                \
+      for (Ti=0; Ti<Ri; Ti++) {                                                                                  \
+        Xf=(float)(Ri-Ti)*x[Fi] + (float)Ti*x[Fi+1];                                                             \
+        Yf=(float)(Ri-Ti)*y[Fi] + (float)Ti*y[Fi+1];                                                             \
+        Xa=Xf+0.001; Yb=Yf+0.001;                                                                                \
+	Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                         \
+	Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                        \
+	Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                        \
+        VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                         \
+        NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                  \
+        NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                  \
+        glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                           \
+	glVertex3f(VertX, VertY, VertZ);                                                                         \
+                                                                                                                 \
+        Xf=(float)(Ri-Ti-1)*x[Fi] + (float)Ti*x[Fi+1];                                                           \
+        Yf=(float)(Ri-Ti-1)*y[Fi] + (float)Ti*y[Fi+1];                                                           \
+        Xa=Xf+0.001; Yb=Yf+0.001;                                                                                \
+	Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                         \
+	Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                        \
+	Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                        \
+        VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                         \
+        NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                  \
+        NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                  \
+        glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                           \
+	glVertex3f(VertX, VertY, VertZ);                                                                         \
+                                                                                                                 \
+      }                                                                                                          \
+      Xf=(float)Ri*x[Fi+1];                                                                                      \
+      Yf=(float)Ri*y[Fi+1];                                                                                      \
+      Xa=Xf+0.001; Yb=Yf+0.001;                                                                                  \
+      Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                           \
+      Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                          \
+      Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                          \
+      VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                           \
+      NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                    \
+      NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
+      glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
+      glVertex3f(VertX, VertY, VertZ);                                                                           \
+      glEnd();                                                                                                   \
+    }                                                                                                            \
+  }                                                                                                              \
+}
+
+static void draw_tetra( void )
+{
+  GLuint list;
+
+  list = glGenLists( 1 );
+  glNewList( list, GL_COMPILE );
+  TRIANGLE(2,seno,edgedivisions,0.5/SQRT6);
+  glEndList();
+
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[0]);
+  glCallList(list);
+  glPushMatrix();
+  glRotatef(180,0,0,1);
+  glRotatef(-tetraangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[1]);
+  glCallList(list);
+  glPopMatrix();
+  glPushMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+tetraangle,0.5,SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[2]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+tetraangle,0.5,-SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[3]);
+  glCallList(list);
+
+  glDeleteLists(list,1);
+}
+
+static void draw_cube( void )
+{
+  GLuint list;
+
+  list = glGenLists( 1 );
+  glNewList( list, GL_COMPILE );
+  SQUARE(2, seno, edgedivisions, 0.5)
+  glEndList();
+
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[0]);
+  glCallList(list);
+  glRotatef(cubeangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[1]);
+  glCallList(list);
+  glRotatef(cubeangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[2]);
+  glCallList(list);
+  glRotatef(cubeangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[3]);
+  glCallList(list);
+  glRotatef(cubeangle,0,1,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[4]);
+  glCallList(list);
+  glRotatef(2*cubeangle,0,1,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[5]);
+  glCallList(list);
+
+  glDeleteLists(list,1);
+}
+
+static void draw_octa( void )
+{
+  GLuint list;
+
+  list = glGenLists( 1 );
+  glNewList( list, GL_COMPILE );
+  TRIANGLE(2,seno,edgedivisions,1/SQRT6);
+  glEndList();
+
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[0]);
+  glCallList(list);
+  glPushMatrix();
+  glRotatef(180,0,0,1);
+  glRotatef(-180+octaangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[1]);
+  glCallList(list);
+  glPopMatrix();
+  glPushMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-octaangle,0.5,SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[2]);
+  glCallList(list);
+  glPopMatrix();
+  glPushMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-octaangle,0.5,-SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[3]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(180,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[4]);
+  glCallList(list);
+  glPushMatrix();
+  glRotatef(180,0,0,1);
+  glRotatef(-180+octaangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[5]);
+  glCallList(list);
+  glPopMatrix();
+  glPushMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-octaangle,0.5,SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[6]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-octaangle,0.5,-SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[7]);
+  glCallList(list);
+
+  glDeleteLists(list,1);
+}
+
+static void draw_dodeca( void )
+{
+  GLuint list;
+
+#define TAU ((SQRT5+1)/2)
+
+  list = glGenLists( 1 );
+  glNewList( list, GL_COMPILE );
+  PENTAGON(1,seno,edgedivisions,sqr(TAU) * sqrt((TAU+2)/5) / 2);
+  glEndList();
+
+  glPushMatrix();
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[0]);
+  glCallList(list);
+  glRotatef(180,0,0,1);
+  glPushMatrix();
+  glRotatef(-dodecaangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[1]);
+  glCallList(list);
+  glPopMatrix();
+  glPushMatrix();
+  glRotatef(-dodecaangle,cos72,sin72,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[2]);
+  glCallList(list);
+  glPopMatrix();
+  glPushMatrix();
+  glRotatef(-dodecaangle,cos72,-sin72,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[3]);
+  glCallList(list);
+  glPopMatrix();
+  glPushMatrix();
+  glRotatef(dodecaangle,cos36,-sin36,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[4]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(dodecaangle,cos36,sin36,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[5]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(180,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[6]);
+  glCallList(list);
+  glRotatef(180,0,0,1);
+  glPushMatrix();
+  glRotatef(-dodecaangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[7]);
+  glCallList(list);
+  glPopMatrix();
+  glPushMatrix();
+  glRotatef(-dodecaangle,cos72,sin72,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[8]);
+  glCallList(list);
+  glPopMatrix();
+  glPushMatrix();
+  glRotatef(-dodecaangle,cos72,-sin72,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[9]);
+  glCallList(list);
+  glPopMatrix();
+  glPushMatrix();
+  glRotatef(dodecaangle,cos36,-sin36,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[10]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(dodecaangle,cos36,sin36,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[11]);
+  glCallList(list);
+
+  glDeleteLists(list,1);
+}
+
+static void draw_ico( void )
+{
+  GLuint list;
+
+  list = glGenLists( 1 );
+  glNewList( list, GL_COMPILE );
+  TRIANGLE(1.5,seno,edgedivisions,(3*SQRT3+SQRT15)/12);
+  glEndList();
+
+  glPushMatrix();
+
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[0]);
+  glCallList(list);
+  glPushMatrix();
+  glRotatef(180,0,0,1);
+  glRotatef(-icoangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[1]);
+  glCallList(list);
+  glPushMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+icoangle,0.5,SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[2]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+icoangle,0.5,-SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[3]);
+  glCallList(list);
+  glPopMatrix();
+  glPushMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+icoangle,0.5,SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[4]);
+  glCallList(list);
+  glPushMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+icoangle,0.5,SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[5]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(180,0,0,1);
+  glRotatef(-icoangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[6]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+icoangle,0.5,-SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[7]);
+  glCallList(list);
+  glPushMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+icoangle,0.5,-SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[8]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(180,0,0,1);
+  glRotatef(-icoangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[9]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(180,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[10]);
+  glCallList(list);
+  glPushMatrix();
+  glRotatef(180,0,0,1);
+  glRotatef(-icoangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[11]);
+  glCallList(list);
+  glPushMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+icoangle,0.5,SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[12]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+icoangle,0.5,-SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[13]);
+  glCallList(list);
+  glPopMatrix();
+  glPushMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+icoangle,0.5,SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[14]);
+  glCallList(list);
+  glPushMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+icoangle,0.5,SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[15]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(180,0,0,1);
+  glRotatef(-icoangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[16]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+icoangle,0.5,-SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[17]);
+  glCallList(list);
+  glPushMatrix();
+  glRotatef(180,0,1,0);
+  glRotatef(-180+icoangle,0.5,-SQRT3/2,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[18]);
+  glCallList(list);
+  glPopMatrix();
+  glRotatef(180,0,0,1);
+  glRotatef(-icoangle,1,0,0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialColor[19]);
+  glCallList(list);
+
+  glDeleteLists(list,1);
+}
+
+static void draw ( void ) {
+  static double t0 = -1.;
+  double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+  if (t0 < 0.0)
+     t0 = t;
+  dt = t - t0;
+  t0 = t;
+
+  glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+  glPushMatrix();
+
+    glTranslatef( 0.0, 0.0, -10.0 );
+    glScalef( Scale*WindH/WindW, Scale, Scale );
+    glTranslatef(2.5*WindW/WindH*sin(step*1.11),2.5*cos(step*1.25*1.11),0);
+    glRotatef(step*100,1,0,0);
+    glRotatef(step*95,0,1,0);
+    glRotatef(step*90,0,0,1);
+
+  seno=(sin(step)+1.0/3.0)*(4.0/5.0)*Magnitude;
+
+  draw_object();
+
+  glPopMatrix();
+
+  glFlush();
+
+  glutSwapBuffers();
+
+  step += dt;
+}
+
+static void idle_( void )
+{
+   glutPostRedisplay();
+}
+
+static void reshape( int width, int height )
+{
+  glViewport(0, 0, WindW=(GLint)width, WindH=(GLint)height);
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 15.0 );
+  glMatrixMode(GL_MODELVIEW);
+}
+
+static void pinit(void);
+
+static void key( unsigned char k, int x, int y )
+{
+  (void) x;
+  (void) y;
+  switch (k) {
+    case '1': object=1; break;
+    case '2': object=2; break;
+    case '3': object=3; break;
+    case '4': object=4; break;
+    case '5': object=5; break;
+    case ' ': mono^=1; break;
+    case 13: smooth^=1; break;
+    case 27:
+       exit(0);
+  }
+  pinit();
+}
+
+static void pinit(void)
+{
+  switch(object) {
+    case 1:
+      draw_object=draw_tetra;
+      MaterialColor[0]=MaterialRed;
+      MaterialColor[1]=MaterialGreen;
+      MaterialColor[2]=MaterialBlue;
+      MaterialColor[3]=MaterialWhite;
+      edgedivisions=tetradivisions;
+      Magnitude=2.5;
+      break;
+    case 2:
+      draw_object=draw_cube;
+      MaterialColor[0]=MaterialRed;
+      MaterialColor[1]=MaterialGreen;
+      MaterialColor[2]=MaterialCyan;
+      MaterialColor[3]=MaterialMagenta;
+      MaterialColor[4]=MaterialYellow;
+      MaterialColor[5]=MaterialBlue;
+      edgedivisions=cubedivisions;
+      Magnitude=2.0;
+      break;
+    case 3:
+      draw_object=draw_octa;
+      MaterialColor[0]=MaterialRed;
+      MaterialColor[1]=MaterialGreen;
+      MaterialColor[2]=MaterialBlue;
+      MaterialColor[3]=MaterialWhite;
+      MaterialColor[4]=MaterialCyan;
+      MaterialColor[5]=MaterialMagenta;
+      MaterialColor[6]=MaterialGray;
+      MaterialColor[7]=MaterialYellow;
+      edgedivisions=octadivisions;
+      Magnitude=2.5;
+      break;
+    case 4:
+      draw_object=draw_dodeca;
+      MaterialColor[ 0]=MaterialRed;
+      MaterialColor[ 1]=MaterialGreen;
+      MaterialColor[ 2]=MaterialCyan;
+      MaterialColor[ 3]=MaterialBlue;
+      MaterialColor[ 4]=MaterialMagenta;
+      MaterialColor[ 5]=MaterialYellow;
+      MaterialColor[ 6]=MaterialGreen;
+      MaterialColor[ 7]=MaterialCyan;
+      MaterialColor[ 8]=MaterialRed;
+      MaterialColor[ 9]=MaterialMagenta;
+      MaterialColor[10]=MaterialBlue;
+      MaterialColor[11]=MaterialYellow;
+      edgedivisions=dodecadivisions;
+      Magnitude=2.0;
+      break;
+    case 5:
+      draw_object=draw_ico;
+      MaterialColor[ 0]=MaterialRed;
+      MaterialColor[ 1]=MaterialGreen;
+      MaterialColor[ 2]=MaterialBlue;
+      MaterialColor[ 3]=MaterialCyan;
+      MaterialColor[ 4]=MaterialYellow;
+      MaterialColor[ 5]=MaterialMagenta;
+      MaterialColor[ 6]=MaterialRed;
+      MaterialColor[ 7]=MaterialGreen;
+      MaterialColor[ 8]=MaterialBlue;
+      MaterialColor[ 9]=MaterialWhite;
+      MaterialColor[10]=MaterialCyan;
+      MaterialColor[11]=MaterialYellow;
+      MaterialColor[12]=MaterialMagenta;
+      MaterialColor[13]=MaterialRed;
+      MaterialColor[14]=MaterialGreen;
+      MaterialColor[15]=MaterialBlue;
+      MaterialColor[16]=MaterialCyan;
+      MaterialColor[17]=MaterialYellow;
+      MaterialColor[18]=MaterialMagenta;
+      MaterialColor[19]=MaterialGray;
+      edgedivisions=icodivisions;
+      Magnitude=2.5;
+      break;
+  }
+  if (mono) {
+    int loop;
+    for (loop=0; loop<20; loop++) MaterialColor[loop]=MaterialGray;
+  }
+  if (smooth) {
+    glShadeModel( GL_SMOOTH );
+  } else {
+    glShadeModel( GL_FLAT );
+  }
+
+}
+
+static void INIT(void)
+{
+  printf("Morph 3D - Shows morphing platonic polyhedra\n");
+  printf("Author: Marcelo Fernandes Vianna (vianna@cat.cbpf.br)\n\n");
+  printf("  [1]    - Tetrahedron\n");
+  printf("  [2]    - Hexahedron (Cube)\n");
+  printf("  [3]    - Octahedron\n");
+  printf("  [4]    - Dodecahedron\n");
+  printf("  [5]    - Icosahedron\n");
+  printf("[SPACE]  - Toggle colored faces\n");
+  printf("[RETURN] - Toggle smooth/flat shading\n");
+  printf(" [ESC]   - Quit\n");
+
+  object=1;
+
+  glutInitWindowPosition(0,0);
+  glutInitWindowSize(640,480);
+
+  glutInitDisplayMode( GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGB );
+
+  if (glutCreateWindow("Morph 3D - Shows morphing platonic polyhedra") <= 0) {
+     exit(0);
+  }
+
+  glClearDepth(1.0);
+  glClearColor( 0.0, 0.0, 0.0, 1.0 );
+  glColor3f( 1.0, 1.0, 1.0 );
+
+  glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+  glFlush();
+  glutSwapBuffers();
+
+  glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
+  glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
+  glLightfv(GL_LIGHT0, GL_POSITION, position0);
+  glLightfv(GL_LIGHT1, GL_AMBIENT, ambient);
+  glLightfv(GL_LIGHT1, GL_DIFFUSE, diffuse);
+  glLightfv(GL_LIGHT1, GL_POSITION, position1);
+  glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
+  glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
+  glEnable(GL_LIGHTING);
+  glEnable(GL_LIGHT0);
+  glEnable(GL_LIGHT1);
+  glEnable(GL_DEPTH_TEST);
+  glEnable(GL_NORMALIZE);
+
+  glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, front_shininess);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, front_specular);
+
+  glHint(GL_FOG_HINT, GL_FASTEST);
+  glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
+  glHint(GL_POLYGON_SMOOTH_HINT, GL_FASTEST);
+
+  pinit();
+
+  glutReshapeFunc( reshape );
+  glutKeyboardFunc( key );
+  glutIdleFunc( idle_ );
+  glutDisplayFunc( draw );
+  glutMainLoop();
+  
+}
+
+int main(int argc, char **argv)
+{
+  INIT();
+  return(0);
+}
diff --git a/progs/demos/multiarb.c b/progs/demos/multiarb.c
new file mode 100644
index 000000000..d963985c6
--- /dev/null
+++ b/progs/demos/multiarb.c
@@ -0,0 +1,345 @@
+
+/*
+ * GL_ARB_multitexture demo
+ *
+ * Command line options:
+ *    -info      print GL implementation information
+ *
+ *
+ * Brian Paul  November 1998  This program is in the public domain.
+ * Modified on 12 Feb 2002 for > 2 texture units.
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <GL/glut.h>
+
+#include "readtex.h"
+
+#define TEXTURE_1_FILE "../images/girl.rgb"
+#define TEXTURE_2_FILE "../images/reflect.rgb"
+
+#define TEX0 1
+#define TEX7 8
+#define ANIMATE 10
+#define QUIT 100
+
+static GLboolean Animate = GL_TRUE;
+static GLint NumUnits = 1;
+static GLboolean TexEnabled[8];
+
+static GLfloat Drift = 0.0;
+static GLfloat drift_increment = 0.005;
+static GLfloat Xrot = 20.0, Yrot = 30.0, Zrot = 0.0;
+
+
+static void Idle( void )
+{
+   if (Animate) {
+      GLint i;
+
+      Drift += drift_increment;
+      if (Drift >= 1.0)
+         Drift = 0.0;
+
+      for (i = 0; i < NumUnits; i++) {
+         glActiveTextureARB(GL_TEXTURE0_ARB + i);
+         glMatrixMode(GL_TEXTURE);
+         glLoadIdentity();
+         if (i == 0) {
+            glTranslatef(Drift, 0.0, 0.0);
+            glScalef(2, 2, 1);
+         }
+         else if (i == 1) {
+            glTranslatef(0.0, Drift, 0.0);
+         }
+         else {
+            glTranslatef(0.5, 0.5, 0.0);
+            glRotatef(180.0 * Drift, 0, 0, 1);
+            glScalef(1.0/i, 1.0/i, 1.0/i);
+            glTranslatef(-0.5, -0.5, 0.0);
+         }
+      }
+      glMatrixMode(GL_MODELVIEW);
+
+      glutPostRedisplay();
+   }
+}
+
+
+static void DrawObject(void)
+{
+   GLint i;
+   GLint j;
+   static const GLfloat   tex_coords[] = {  0.0,  0.0,  1.0,  1.0,  0.0 };
+   static const GLfloat   vtx_coords[] = { -1.0, -1.0,  1.0,  1.0, -1.0 };
+
+   if (!TexEnabled[0] && !TexEnabled[1])
+      glColor3f(0.1, 0.1, 0.1);  /* add onto this */
+   else
+      glColor3f(1, 1, 1);  /* modulate this */
+
+   glBegin(GL_QUADS);
+
+   /* Toggle between the vector and scalar entry points.  This is done purely
+    * to hit multiple paths in the driver.
+    */
+   if ( Drift > 0.49 ) {
+      for (j = 0; j < 4; j++ ) {
+	 for (i = 0; i < NumUnits; i++)
+	    glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, 
+				 tex_coords[j], tex_coords[j+1]);
+	 glVertex2f( vtx_coords[j], vtx_coords[j+1] );
+      }
+   }
+   else {
+      for (j = 0; j < 4; j++ ) {
+	 for (i = 0; i < NumUnits; i++)
+	    glMultiTexCoord2fvARB(GL_TEXTURE0_ARB + i, & tex_coords[j]);
+	 glVertex2fv( & vtx_coords[j] );
+      }
+   }
+
+   glEnd();
+}
+
+
+
+static void Display( void )
+{
+   static GLint T0 = 0;
+   static GLint Frames = 0;
+   GLint t;
+
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glPushMatrix();
+      glRotatef(Xrot, 1.0, 0.0, 0.0);
+      glRotatef(Yrot, 0.0, 1.0, 0.0);
+      glRotatef(Zrot, 0.0, 0.0, 1.0);
+      glScalef(5.0, 5.0, 5.0);
+      DrawObject();
+   glPopMatrix();
+
+   glutSwapBuffers();
+
+   Frames++;
+
+   t = glutGet(GLUT_ELAPSED_TIME);
+   if (t - T0 >= 250) {
+      GLfloat seconds = (t - T0) / 1000.0;
+      drift_increment = 2.2 * seconds / Frames;
+      T0 = t;
+      Frames = 0;
+   }
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 10.0, 100.0 );
+   /*glOrtho( -6.0, 6.0, -6.0, 6.0, 10.0, 100.0 );*/
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -70.0 );
+}
+
+
+static void ModeMenu(int entry)
+{
+   if (entry >= TEX0 && entry <= TEX7) {
+      /* toggle */
+      GLint i = entry - TEX0;
+      TexEnabled[i] = !TexEnabled[i];
+      glActiveTextureARB(GL_TEXTURE0_ARB + i);
+      if (TexEnabled[i])
+         glEnable(GL_TEXTURE_2D);
+      else
+         glDisable(GL_TEXTURE_2D);
+      printf("Enabled: ");
+      for (i = 0; i < NumUnits; i++)
+         printf("%d ", (int) TexEnabled[i]);
+      printf("\n");
+   }
+   else if (entry==ANIMATE) {
+      Animate = !Animate;
+   }
+   else if (entry==QUIT) {
+      exit(0);
+   }
+
+   glutPostRedisplay();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   float step = 3.0;
+   (void) x;
+   (void) y;
+
+   switch (key) {
+      case GLUT_KEY_UP:
+         Xrot += step;
+         break;
+      case GLUT_KEY_DOWN:
+         Xrot -= step;
+         break;
+      case GLUT_KEY_LEFT:
+         Yrot += step;
+         break;
+      case GLUT_KEY_RIGHT:
+         Yrot -= step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( int argc, char *argv[] )
+{
+   GLuint texObj[8];
+   GLint size, i;
+
+   const char *exten = (const char *) glGetString(GL_EXTENSIONS);
+   if (!strstr(exten, "GL_ARB_multitexture")) {
+      printf("Sorry, GL_ARB_multitexture not supported by this renderer.\n");
+      exit(1);
+   }
+
+   glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &NumUnits);
+   printf("%d texture units supported\n", NumUnits);
+   if (NumUnits > 8)
+      NumUnits = 8;
+
+   glGetIntegerv(GL_MAX_TEXTURE_SIZE, &size);
+   printf("%d x %d max texture size\n", size, size);
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+   for (i = 0; i < NumUnits; i++) {
+      if (i < 2)
+         TexEnabled[i] = GL_TRUE;
+      else
+         TexEnabled[i] = GL_FALSE;
+   }
+
+   /* allocate two texture objects */
+   glGenTextures(NumUnits, texObj);
+
+   /* setup the texture objects */
+   for (i = 0; i < NumUnits; i++) {
+
+      glActiveTextureARB(GL_TEXTURE0_ARB + i);
+      glBindTexture(GL_TEXTURE_2D, texObj[i]);
+
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+      if (i == 0) {
+         if (!LoadRGBMipmaps(TEXTURE_1_FILE, GL_RGB)) {
+            printf("Error: couldn't load texture image\n");
+            exit(1);
+         }
+      }
+      else if (i == 1) {
+         if (!LoadRGBMipmaps(TEXTURE_2_FILE, GL_RGB)) {
+            printf("Error: couldn't load texture image\n");
+            exit(1);
+         }
+      }
+      else {
+         /* checker */
+         GLubyte image[8][8][3];
+         GLint i, j;
+         for (i = 0; i < 8; i++) {
+            for (j = 0; j < 8; j++) {
+               if ((i + j) & 1) {
+                  image[i][j][0] = 50;
+                  image[i][j][1] = 50;
+                  image[i][j][2] = 50;
+               }
+               else {
+                  image[i][j][0] = 25;
+                  image[i][j][1] = 25;
+                  image[i][j][2] = 25;
+               }
+            }
+         }
+         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 8, 8, 0,
+                      GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *) image);
+      }
+
+      /* Bind texObj[i] to ith texture unit */
+      if (i < 2)
+         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+      else
+         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD);
+
+      if (TexEnabled[i])
+         glEnable(GL_TEXTURE_2D);
+   }
+
+   glShadeModel(GL_FLAT);
+   glClearColor(0.3, 0.3, 0.4, 1.0);
+
+   if (argc > 1 && strcmp(argv[1], "-info")==0) {
+      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+   }
+}
+
+
+int main( int argc, char *argv[] )
+{
+   GLint i;
+
+   glutInit( &argc, argv );
+   glutInitWindowSize( 300, 300 );
+   glutInitWindowPosition( 0, 0 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+   glutCreateWindow(argv[0] );
+
+   Init( argc, argv );
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+   glutIdleFunc( Idle );
+
+   glutCreateMenu(ModeMenu);
+
+   for (i = 0; i < NumUnits; i++) {
+      char s[100];
+      sprintf(s, "Toggle Texture %d", i);
+      glutAddMenuEntry(s, TEX0 + i);
+   }
+   glutAddMenuEntry("Toggle Animation", ANIMATE);
+   glutAddMenuEntry("Quit", QUIT);
+   glutAttachMenu(GLUT_RIGHT_BUTTON);
+
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/occlude.c b/progs/demos/occlude.c
new file mode 100644
index 000000000..8f7b90984
--- /dev/null
+++ b/progs/demos/occlude.c
@@ -0,0 +1,234 @@
+/*
+ * GL_HP_occlustion_test demo
+ *
+ * Brian Paul
+ * 31 March 2000
+ *
+ * Copyright (C) 2000  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <GL/glut.h>
+#include <GL/glext.h>
+
+
+static GLfloat Xpos = 0;
+static GLboolean Anim = GL_TRUE;
+
+
+static void
+PrintString(const char *s)
+{
+   while (*s) {
+      glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
+      s++;
+   }
+}
+
+
+
+static void Idle(void)
+{
+   static int lastTime = 0;
+   static int sign = +1;
+   int time = glutGet(GLUT_ELAPSED_TIME);
+   float step;
+
+   if (lastTime == 0)
+      lastTime = time;
+   else if (time - lastTime < 20)  /* 50Hz update */
+      return;
+
+   step = (time - lastTime) / 1000.0 * sign;
+   lastTime = time;
+
+   Xpos += step;
+
+   if (Xpos > 2.5) {
+      Xpos = 2.5;
+      sign = -1;
+   }
+   else if (Xpos < -2.5) {
+      Xpos = -2.5;
+      sign = +1;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Display( void )
+{
+   GLboolean result;
+
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -15.0 );
+
+   /* draw the occluding polygons */
+   glColor3f(0, 0.6, 0.8);
+   glBegin(GL_QUADS);
+   glVertex2f(-1.6, -1.5);
+   glVertex2f(-0.4, -1.5);
+   glVertex2f(-0.4,  1.5);
+   glVertex2f(-1.6,  1.5);
+
+   glVertex2f( 0.4, -1.5);
+   glVertex2f( 1.6, -1.5);
+   glVertex2f( 1.6,  1.5);
+   glVertex2f( 0.4,  1.5);
+   glEnd();
+
+   /* draw the test polygon with occlusion testing */
+   glPushMatrix();
+   glTranslatef(Xpos, 0, -0.5);
+   glScalef(0.3, 0.3, 1.0);
+   glRotatef(-90.0 * Xpos, 0, 0, 1);
+
+   glEnable(GL_OCCLUSION_TEST_HP);  /* NOTE: enabling the occlusion test */
+                                    /* doesn't clear the result flag! */
+   glColorMask(0, 0, 0, 0);
+   glDepthMask(GL_FALSE);
+   /* this call clear's the result flag.  Not really needed for this demo. */
+   glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP, &result);
+
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, -1, 0);
+   glVertex3f( 1, -1, 0);
+   glVertex3f( 1,  1, 0);
+   glVertex3f(-1,  1, 0);
+   glEnd();
+
+   glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP, &result);
+   /* turn off occlusion testing */
+   glDisable(GL_OCCLUSION_TEST_HP);
+   glColorMask(1, 1, 1, 1);
+   glDepthMask(GL_TRUE);
+
+   /* draw the green rect, so we can see what's going on */
+   glColor3f(0.8, 0.5, 0);
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, -1, 0);
+   glVertex3f( 1, -1, 0);
+   glVertex3f( 1,  1, 0);
+   glVertex3f(-1,  1, 0);
+   glEnd();
+
+   glPopMatrix();
+
+
+   /* Print result message */
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+
+   glColor3f(1, 1, 1);
+   glRasterPos3f(-0.25, -0.7, 0);
+
+   if (result)
+      PrintString("   Visible");
+   else
+      PrintString("Fully Occluded");
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 'a':
+         Anim = !Anim;
+         if (Anim)
+            glutIdleFunc( Idle );
+         else
+            glutIdleFunc( NULL );
+         break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   const GLfloat step = 0.1;
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_LEFT:
+         Xpos -= step;
+         break;
+      case GLUT_KEY_RIGHT:
+         Xpos += step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+   const char *ext = (const char *) glGetString(GL_EXTENSIONS);
+   if (!strstr(ext, "GL_HP_occlusion_test")) {
+      printf("Sorry, this demo requires the GL_HP_occlusion_test extension\n");
+      exit(-1);
+   }
+
+   glEnable(GL_DEPTH_TEST);
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 400, 400 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+   glutCreateWindow(argv[0]);
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutIdleFunc( Idle );
+   glutDisplayFunc( Display );
+   Init();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/paltex.c b/progs/demos/paltex.c
new file mode 100644
index 000000000..aa9c0da36
--- /dev/null
+++ b/progs/demos/paltex.c
@@ -0,0 +1,270 @@
+
+/*
+ * Paletted texture demo.  Written by Brian Paul.
+ * This program is in the public domain.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#ifdef _WIN32
+#include <windows.h>
+#endif
+#define GL_GLEXT_PROTOTYPES
+#include <GL/glut.h>
+
+
+static float Rot = 0.0;
+static GLboolean Anim = 1;
+
+
+static void Idle( void )
+{
+   float t = glutGet(GLUT_ELAPSED_TIME) * 0.001;  /* in seconds */
+   Rot = t * 360 / 4;  /* 1 rotation per 4 seconds */
+   glutPostRedisplay();
+}
+
+
+static void Display( void )
+{
+   /* draw background gradient */
+   glDisable(GL_TEXTURE_2D);
+   glBegin(GL_POLYGON);
+   glColor3f(1.0, 0.0, 0.2); glVertex2f(-1.5, -1.0);
+   glColor3f(1.0, 0.0, 0.2); glVertex2f( 1.5, -1.0);
+   glColor3f(0.0, 0.0, 1.0); glVertex2f( 1.5,  1.0);
+   glColor3f(0.0, 0.0, 1.0); glVertex2f(-1.5,  1.0);
+   glEnd();
+
+   glPushMatrix();
+   glRotatef(Rot, 0, 0, 1);
+
+   glEnable(GL_TEXTURE_2D);
+   glBegin(GL_POLYGON);
+   glTexCoord2f(0, 1);  glVertex2f(-1, -0.5);
+   glTexCoord2f(1, 1);  glVertex2f( 1, -0.5);
+   glTexCoord2f(1, 0);  glVertex2f( 1,  0.5);
+   glTexCoord2f(0, 0);  glVertex2f(-1,  0.5);
+   glEnd();
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( -1.5, 1.5, -1.0, 1.0, -1.0, 1.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         exit(0);
+         break;
+      case 's':
+         Rot += 0.5;
+         break;
+      case ' ':
+         Anim = !Anim;
+         if (Anim)
+            glutIdleFunc( Idle );
+         else
+            glutIdleFunc( NULL );
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+#define HEIGHT 8
+#define WIDTH 32
+   /* 257 = HEIGHT * WIDTH + 1 (for trailing '\0') */
+   static char texture[257] = {"\
+                                \
+    MMM    EEEE   SSS    AAA    \
+   M M M  E      S   S  A   A   \
+   M M M  EEEE    SS    A   A   \
+   M M M  E         SS  AAAAA   \
+   M   M  E      S   S  A   A   \
+   M   M   EEEE   SSS   A   A   \
+                                "
+      };
+   GLubyte table[256][4];
+
+   if (!glutExtensionSupported("GL_EXT_paletted_texture")) {
+      printf("Sorry, GL_EXT_paletted_texture not supported\n");
+      exit(0);
+   }
+
+   /* load the color table for each texel-index */
+   memset(table, 0, 256*4);
+   table[' '][0] = 255;
+   table[' '][1] = 255;
+   table[' '][2] = 255;
+   table[' '][3] = 64;
+   table['M'][0] = 255;
+   table['M'][1] = 0;
+   table['M'][2] = 0;
+   table['M'][3] = 255;
+   table['E'][0] = 0;
+   table['E'][1] = 255;
+   table['E'][2] = 0;
+   table['E'][3] = 255;
+   table['S'][0] = 0;
+   table['S'][1] = 0;
+   table['S'][2] = 255;
+   table['S'][3] = 255;
+   table['A'][0] = 255;
+   table['A'][1] = 255;
+   table['A'][2] = 0;
+   table['A'][3] = 255;
+
+#ifdef GL_EXT_paletted_texture
+
+#if defined(GL_EXT_shared_texture_palette) && defined(USE_SHARED_PALETTE)
+   printf("Using shared palette\n");
+   glColorTableEXT(GL_SHARED_TEXTURE_PALETTE_EXT,    /* target */
+                   GL_RGBA,          /* internal format */
+                   256,              /* table size */
+                   GL_RGBA,          /* table format */
+                   GL_UNSIGNED_BYTE, /* table type */
+                   table);           /* the color table */
+   glEnable(GL_SHARED_TEXTURE_PALETTE_EXT);
+#else
+   glColorTableEXT(GL_TEXTURE_2D,    /* target */
+                   GL_RGBA,          /* internal format */
+                   256,              /* table size */
+                   GL_RGBA,          /* table format */
+                   GL_UNSIGNED_BYTE, /* table type */
+                   table);           /* the color table */
+#endif
+
+   glTexImage2D(GL_TEXTURE_2D,       /* target */
+                0,                   /* level */
+                GL_COLOR_INDEX8_EXT, /* internal format */
+                WIDTH, HEIGHT,       /* width, height */
+                0,                   /* border */
+                GL_COLOR_INDEX,      /* texture format */
+                GL_UNSIGNED_BYTE,    /* texture type */
+                texture);            /* the texture */
+#endif
+
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+   glEnable(GL_TEXTURE_2D);
+
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+#undef HEIGHT
+#undef WIDTH
+}
+
+
+
+/*
+ * Color ramp test
+ */
+static void Init2( void )
+{
+#define HEIGHT 32
+#define WIDTH 256
+   static char texture[HEIGHT][WIDTH];
+   GLubyte table[256][4];
+   int i, j;
+
+   if (!glutExtensionSupported("GL_EXT_paletted_texture")) {
+      printf("Sorry, GL_EXT_paletted_texture not supported\n");
+      exit(0);
+   }
+
+   for (j = 0; j < HEIGHT; j++) {
+      for (i = 0; i < WIDTH; i++) {
+         texture[j][i] = i;
+      }
+   }
+
+   for (i = 0; i < 255; i++) {
+      table[i][0] = i;
+      table[i][1] = 0;
+      table[i][2] = 0;
+      table[i][3] = 255;
+   }
+
+#ifdef GL_EXT_paletted_texture
+
+#if defined(GL_EXT_shared_texture_palette) && defined(USE_SHARED_PALETTE)
+   printf("Using shared palette\n");
+   glColorTableEXT(GL_SHARED_TEXTURE_PALETTE_EXT,    /* target */
+                   GL_RGBA,          /* internal format */
+                   256,              /* table size */
+                   GL_RGBA,          /* table format */
+                   GL_UNSIGNED_BYTE, /* table type */
+                   table);           /* the color table */
+   glEnable(GL_SHARED_TEXTURE_PALETTE_EXT);
+#else
+   glColorTableEXT(GL_TEXTURE_2D,    /* target */
+                   GL_RGBA,          /* internal format */
+                   256,              /* table size */
+                   GL_RGBA,          /* table format */
+                   GL_UNSIGNED_BYTE, /* table type */
+                   table);           /* the color table */
+#endif
+
+   glTexImage2D(GL_TEXTURE_2D,       /* target */
+                0,                   /* level */
+                GL_COLOR_INDEX8_EXT, /* internal format */
+                WIDTH, HEIGHT,       /* width, height */
+                0,                   /* border */
+                GL_COLOR_INDEX,      /* texture format */
+                GL_UNSIGNED_BYTE,    /* texture type */
+                texture);            /* teh texture */
+#endif
+
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+   glEnable(GL_TEXTURE_2D);
+
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 400, 300 );
+
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+
+   glutCreateWindow(argv[0]);
+
+   Init();
+   (void) Init2; /* silence warning */
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutDisplayFunc( Display );
+   if (Anim)
+      glutIdleFunc( Idle );
+
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/particles.cxx b/progs/demos/particles.cxx
new file mode 100644
index 000000000..b88c318e0
--- /dev/null
+++ b/progs/demos/particles.cxx
@@ -0,0 +1,219 @@
+/*
+ * This program is under the GNU GPL.
+ * Use at your own risk.
+ *
+ * written by David Bucciarelli (humanware@plus.it)
+ *            Humanware s.r.l.
+ */
+
+#include <stdlib.h>
+
+#include "particles.h"
+
+#define vinit(a,i,j,k) {\
+  (a)[0]=i;\
+  (a)[1]=j;\
+  (a)[2]=k;\
+}
+
+#define vadds(a,dt,b) {\
+  (a)[0]+=(dt)*(b)[0];\
+  (a)[1]+=(dt)*(b)[1];\
+  (a)[2]+=(dt)*(b)[2];\
+}
+
+#define vequ(a,b) {\
+  (a)[0]=(b)[0];\
+  (a)[1]=(b)[1];\
+  (a)[2]=(b)[2];\
+}
+
+#define vinter(a,dt,b,c) {\
+  (a)[0]=(dt)*(b)[0]+(1.0-dt)*(c)[0];\
+  (a)[1]=(dt)*(b)[1]+(1.0-dt)*(c)[1];\
+  (a)[2]=(dt)*(b)[2]+(1.0-dt)*(c)[2];\
+}
+
+#define clamp(a)        ((a) < 0.0 ? 0.0 : ((a) < 1.0 ? (a) : 1.0))
+
+#define vclamp(v) {\
+  (v)[0]=clamp((v)[0]);\
+  (v)[1]=clamp((v)[1]);\
+  (v)[2]=clamp((v)[2]);\
+}
+
+
+float rainParticle::min[3];
+float rainParticle::max[3];
+float rainParticle::partLength=0.2f;
+
+
+static float vrnd(void)
+{
+  return(((float)rand())/RAND_MAX);
+}
+
+
+particle::particle()
+{
+  age=0.0f;
+
+  vinit(acc,0.0f,0.0f,0.0f);
+  vinit(vel,0.0f,0.0f,0.0f);
+  vinit(pos,0.0f,0.0f,0.0f);
+}
+
+void particle::elapsedTime(float dt)
+{
+  age+=dt;
+
+  vadds(vel,dt,acc);
+
+  vadds(pos,dt,vel);
+}
+
+/////////////////////////////////////////
+// Particle System
+/////////////////////////////////////////
+
+particleSystem::particleSystem()
+{
+  t=0.0f;
+
+  part=NULL;
+
+  particleNum=0;
+}
+
+particleSystem::~particleSystem()
+{
+  if(part)
+    free(part);
+}
+
+void particleSystem::addParticle(particle *p)
+{
+  if(!part) {
+    part=(particle **)calloc(1,sizeof(particle *));
+    part[0]=p;
+    particleNum=1;
+  } else {
+    particleNum++;
+    part=(particle **)realloc(part,sizeof(particle *)*particleNum);
+    part[particleNum-1]=p;
+  }
+}
+
+void particleSystem::reset(void)
+{
+  if(part)
+    free(part);
+
+  t=0.0f;
+
+  part=NULL;
+
+  particleNum=0;
+}
+
+void particleSystem::draw(void)
+{
+  if(!part)
+    return;
+
+  part[0]->beginDraw();
+  for(unsigned int i=0;i<particleNum;i++)
+    part[i]->draw();
+  part[0]->endDraw();
+}
+
+void particleSystem::addTime(float dt)
+{
+  if(!part)
+    return;
+
+  for(unsigned int i=0;i<particleNum;i++) {
+    part[i]->elapsedTime(dt);
+    part[i]->checkAge();
+  }
+}
+
+/////////////////////////////////////////
+// Rain
+/////////////////////////////////////////
+
+void rainParticle::init(void)
+{
+  age=0.0f;
+
+  acc[0]=0.0f;
+  acc[1]=-0.98f;
+  acc[2]=0.0f;
+
+  vel[0]=0.0f;
+  vel[1]=0.0f;
+  vel[2]=0.0f;
+
+  oldpos[0]=pos[0]=min[0]+(max[0]-min[0])*vrnd();
+  oldpos[1]=pos[1]=max[1]+0.2f*max[1]*vrnd();
+  oldpos[2]=pos[2]=min[2]+(max[2]-min[2])*vrnd();
+
+  vadds(oldpos,-partLength,vel);
+}
+
+rainParticle::rainParticle()
+{ 
+  init();
+}
+
+void rainParticle::setRainingArea(float minx, float miny, float minz,
+				  float maxx, float maxy, float maxz)
+{
+  vinit(min,minx,miny,minz);
+  vinit(max,maxx,maxy,maxz);
+}
+
+void rainParticle::setLength(float l)
+{
+  partLength=l;
+}
+
+void rainParticle::draw(void)
+{
+  glColor4f(0.7f,0.95f,1.0f,0.0f);
+  glVertex3fv(oldpos);
+
+  glColor4f(0.3f,0.7f,1.0f,1.0f);
+  glVertex3fv(pos);
+}
+
+void rainParticle::checkAge(void)
+{
+  if(pos[1]<min[1])
+    init();
+}
+
+void rainParticle::elapsedTime(float dt)
+{
+  particle::elapsedTime(dt);
+
+  if(pos[0]<min[0])
+    pos[0]=max[0]-(min[0]-pos[0]);
+  if(pos[2]<min[2])
+    pos[2]=max[2]-(min[2]-pos[2]);
+
+  if(pos[0]>max[0])
+    pos[0]=min[0]+(pos[0]-max[0]);
+  if(pos[2]>max[2])
+    pos[2]=min[2]+(pos[2]-max[2]);
+
+  vequ(oldpos,pos);
+  vadds(oldpos,-partLength,vel);
+}
+
+void rainParticle::randomHeight(void)
+{
+  pos[1]=(max[1]-min[1])*vrnd()+min[1];
+
+  oldpos[1]=pos[1]-partLength*vel[1];
+}
diff --git a/progs/demos/particles.h b/progs/demos/particles.h
new file mode 100644
index 000000000..a49dd691e
--- /dev/null
+++ b/progs/demos/particles.h
@@ -0,0 +1,81 @@
+/*
+ * This program is under the GNU GPL.
+ * Use at your own risk.
+ *
+ * written by David Bucciarelli (humanware@plus.it)
+ *            Humanware s.r.l.
+ */
+
+#ifndef PARTICLES_H
+#define PARTICLES_H
+
+#include <GL/gl.h>
+
+class particle {
+ protected:
+  float age;         // in seconds
+  float acc[3];
+  float vel[3];
+  float pos[3];
+
+ public:
+  particle();
+  virtual ~particle() {};
+
+  virtual void beginDraw(void) {};
+  virtual void draw(void)=0;
+  virtual void endDraw(void) {};
+
+  virtual void elapsedTime(float);
+  virtual void checkAge(void) {};
+};
+
+class particleSystem {
+ protected:
+  particle **part;
+
+  float t;
+
+  unsigned long particleNum;
+ public:
+  particleSystem();
+  ~particleSystem();
+
+  void addParticle(particle *);
+
+  void reset(void);
+
+  void draw(void);
+
+  void addTime(float);
+};
+
+class rainParticle : public particle {
+ protected:
+  static float min[3];
+  static float max[3];
+  static float partLength;
+
+  float oldpos[3];
+
+  void init(void);
+ public:
+  rainParticle();
+
+  static void setRainingArea(float, float, float,
+			     float, float, float);
+  static void setLength(float);
+  static float getLength(void) { return partLength; };
+
+  void beginDraw(void) { glBegin(GL_LINES); };
+  void draw(void);
+  void endDraw(void) { glEnd(); };
+
+  void elapsedTime(float);
+
+  void checkAge(void);
+
+  void randomHeight(void);
+};
+
+#endif
diff --git a/progs/demos/pixeltex.c b/progs/demos/pixeltex.c
new file mode 100644
index 000000000..03e653a45
--- /dev/null
+++ b/progs/demos/pixeltex.c
@@ -0,0 +1,210 @@
+/*
+ * GL_SGIS_pixel_texture demo
+ *
+ * Brian Paul
+ * 6 Apr 2000
+ *
+ * Copyright (C) 2000  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * How this works:
+ * 1. We load the image into a 2D texture.
+ * 2. We generate a sequence of RGB images in which the R component
+ *    is really the S texture coordinate and the G component is really
+ *    the T texture coordinate.
+ *    By warping the mapping from R to S and G to T we can get non-linear
+ *    distortions.
+ * 3. Draw the warped image (a 2-D warping function) with pixel texgen
+ *    enabled.
+ * 4. Loop over the warped images to animate.
+ *
+ * The pixel texgen extension can also be used to do color-space
+ * conversions.  For example, we could convert YCR to RGB with a
+ * 3D texture map which takes YCR as the S,T,R texture coordinate and
+ * returns RGB texel values.
+ *
+ * You can use this extension in (at least) two ways:
+ * 1. glDrawPixels w/ color space conversion/warping
+ * 2. glDrawPixels to spatially warp another image in texture memory
+ *
+ * We're basically using glDrawPixels to draw a texture coordinate image.
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <GL/glut.h>
+#include <GL/glext.h>
+#include "readtex.h"
+
+#define TEXTURE_FILE "../images/girl.rgb"
+
+static int ImgWidth = 300, ImgHeight = 300;
+#define FRAMES 20
+static GLubyte *ImgData[FRAMES];
+static GLint Frame = 0;
+
+static GLboolean TextureFlag = GL_TRUE;
+
+
+static void Display( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   if (TextureFlag) {
+      glEnable(GL_PIXEL_TEXTURE_SGIS);
+      glEnable(GL_TEXTURE_2D);
+   }
+   else {
+      glDisable(GL_PIXEL_TEXTURE_SGIS);
+      glDisable(GL_TEXTURE_2D);
+   }
+
+   glColor3f(1, 1, 1);
+   glRasterPos2f(10, 10);
+   glDrawPixels(ImgWidth, ImgHeight, GL_RGB, GL_UNSIGNED_BYTE, ImgData[Frame]);
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho(0, width, 0, height, -1, 1);
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case ' ':
+         TextureFlag = !TextureFlag;
+         break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Idle(void)
+{
+   Frame++;
+   if (Frame >= FRAMES)
+      Frame = 0;
+   glutPostRedisplay();
+}
+
+
+static GLubyte warp(GLfloat s, int frame)
+{
+   static const GLfloat pi = 3.14159265;
+   static int halfFrame = FRAMES / 2;
+   GLfloat y, weight, v;
+   if (frame >= halfFrame)
+      frame = halfFrame - (frame - halfFrame);
+   y = sin(s * pi);
+   weight = (float) frame / (FRAMES-1);
+   v = y * (0.8 * weight + 0.2);
+   return (GLint) (v * 255.0F);
+}
+
+
+static void InitImage(void)
+{
+   int i, j, frame;
+   for (frame = 0; frame < FRAMES; frame++) {
+      ImgData[frame] = (GLubyte *) malloc(ImgWidth * ImgHeight * 3);
+      for (i = 0; i < ImgHeight; i++) {
+         for (j = 0; j < ImgWidth; j++) {
+            GLubyte *pixel = ImgData[frame] + (i * ImgWidth + j) * 3;
+            pixel[0] = warp((float) j / (ImgWidth - 0), frame);
+            pixel[1] = warp((float) i / (ImgHeight - 0), frame);
+            pixel[2] = 0.0;
+         }
+      }
+   }
+}
+
+
+static void Init( int argc, char *argv[] )
+{
+   const char *exten = (const char *) glGetString(GL_EXTENSIONS);
+   if (!strstr(exten, "GL_SGIS_pixel_texture")) {
+      printf("Sorry, GL_SGIS_pixel_texture not supported by this renderer.\n");
+      exit(1);
+   }
+
+   /* linear filtering looks nicer, but it's slower, since it's in software */
+#if 1
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+#else
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+#endif
+
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+   if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
+      printf("Error: couldn't load texture image\n");
+      exit(1);
+   }
+
+   glClearColor(0.3, 0.3, 0.4, 1.0);
+
+   InitImage();
+
+   printf("Hit SPACE to toggle pixel texgen\n");
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowSize( 330, 330 );
+   glutInitWindowPosition( 0, 0 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+   glutCreateWindow(argv[0] );
+
+   Init( argc, argv );
+
+   glutKeyboardFunc( Key );
+   glutReshapeFunc( Reshape );
+   glutDisplayFunc( Display );
+   glutIdleFunc( Idle );
+
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/pointblast.c b/progs/demos/pointblast.c
new file mode 100644
index 000000000..715813f17
--- /dev/null
+++ b/progs/demos/pointblast.c
@@ -0,0 +1,498 @@
+
+/* Copyright (c) Mark J. Kilgard, 1997.  */
+
+/* This program is freely distributable without licensing fees 
+   and is provided without guarantee or warrantee expressed or 
+   implied. This program is -not- in the public domain. */
+
+/* This example demonstrates how to render particle effects
+   with OpenGL.  A cloud of pinkish/orange particles explodes with the
+   particles bouncing off the ground.  When the EXT_point_parameters
+   is present , the particle size is attenuated based on eye distance. */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>       /* for cos(), sin(), and sqrt() */
+#ifdef _WIN32
+#include <windows.h>
+#endif
+#define GL_GLEXT_PROTOTYPES
+#include <GL/glut.h>
+
+/* Some <math.h> files do not define M_PI... */
+#ifndef M_PI
+#define M_PI 3.14159265
+#endif
+
+#if 0  /* For debugging. */
+#undef GL_EXT_point_parameters
+#endif
+
+static GLfloat angle = -150;   /* in degrees */
+static int spin = 0;
+static int moving, begin;
+static int newModel = 1;
+static float theTime;
+static int repeat = 1;
+static int blend = 1;
+int useMipmaps = 1;
+int linearFiltering = 1;
+
+static GLfloat constant[3] = { 1/5.0, 0.0, 0.0 };
+static GLfloat linear[3] = { 0.0, 1/5.0, 0.0 };
+static GLfloat theQuad[3] = { 0.25, 0.0, 1/60.0 };
+
+#define MAX_POINTS 2000
+
+static int numPoints = 200;
+
+static GLfloat pointList[MAX_POINTS][3];
+static GLfloat pointTime[MAX_POINTS];
+static GLfloat pointVelocity[MAX_POINTS][2];
+static GLfloat pointDirection[MAX_POINTS][2];
+static int colorList[MAX_POINTS];
+static int animate = 1, motion = 0;
+
+static GLfloat colorSet[][4] = {
+  /* Shades of red. */
+  { 0.7, 0.2, 0.4, 0.5 },
+  { 0.8, 0.0, 0.7, 0.5 },
+  { 1.0, 0.0, 0.0, 0.5 },
+  { 0.9, 0.3, 0.6, 0.5 },
+  { 1.0, 0.4, 0.0, 0.5 },
+  { 1.0, 0.0, 0.5, 0.5 },
+};
+
+#define NUM_COLORS (sizeof(colorSet)/sizeof(colorSet[0]))
+
+#define DEAD (NUM_COLORS+1)
+
+
+#if 0  /* drand48 might be better on Unix machines */
+#define RANDOM_RANGE(lo, hi) ((lo) + (hi - lo) * drand48())
+#else
+static float float_rand(void) { return rand() / (float) RAND_MAX; }
+#define RANDOM_RANGE(lo, hi) ((lo) + (hi - lo) * float_rand())
+#endif
+
+#define MEAN_VELOCITY 3.0
+#define GRAVITY 2.0
+
+/* Modeling units of ground extent in each X and Z direction. */
+#define EDGE 12
+
+static void
+makePointList(void)
+{
+  float angle, velocity, direction;
+  int i;
+
+  motion = 1;
+  for (i=0; i<numPoints; i++) {
+    pointList[i][0] = 0.0;
+    pointList[i][1] = 0.0;
+    pointList[i][2] = 0.0;
+    pointTime[i] = 0.0;
+    angle = (RANDOM_RANGE(60.0, 70.0)) * M_PI/180.0;
+    direction = RANDOM_RANGE(0.0, 360.0) * M_PI/180.0;
+    pointDirection[i][0] = cos(direction);
+    pointDirection[i][1] = sin(direction);
+    velocity = MEAN_VELOCITY + RANDOM_RANGE(-0.8, 1.0);
+    pointVelocity[i][0] = velocity * cos(angle);
+    pointVelocity[i][1] = velocity * sin(angle);
+    colorList[i] = rand() % NUM_COLORS;
+  }
+  theTime = 0.0;
+}
+
+static void
+updatePointList(void)
+{
+  float distance;
+  int i;
+
+  static double t0 = -1.;
+  double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+  if (t0 < 0.0)
+    t0 = t;
+  dt = t - t0;
+  t0 = t;
+
+  motion = 0;
+  for (i=0; i<numPoints; i++) {
+    distance = pointVelocity[i][0] * theTime;
+
+    /* X and Z */
+    pointList[i][0] = pointDirection[i][0] * distance;
+    pointList[i][2] = pointDirection[i][1] * distance;
+
+    /* Z */
+    pointList[i][1] =
+      (pointVelocity[i][1] - 0.5 * GRAVITY * pointTime[i])*pointTime[i];
+
+    /* If we hit the ground, bounce the point upward again. */
+    if (pointList[i][1] <= 0.0) {
+      if (distance > EDGE) {
+        /* Particle has hit ground past the distance duration of
+          the particles.  Mark particle as dead. */
+       colorList[i] = NUM_COLORS;  /* Not moving. */
+       continue;
+      }
+
+      pointVelocity[i][1] *= 0.8;  /* 80% of previous up velocity. */
+      pointTime[i] = 0.0;  /* Reset the particles sense of up time. */
+    }
+    motion = 1;
+    pointTime[i] += dt;
+  }
+  theTime += dt;
+  if (!motion && !spin) {
+    if (repeat) {
+      makePointList();
+    } else {
+      glutIdleFunc(NULL);
+    }
+  }
+}
+
+static void
+idle(void)
+{
+  updatePointList();
+  if (spin) {
+    angle += 0.3;
+    newModel = 1;
+  }
+  glutPostRedisplay();
+}
+
+static void
+visible(int vis)
+{
+  if (vis == GLUT_VISIBLE) {
+    if (animate && (motion || spin)) {
+      glutIdleFunc(idle);
+    }
+  } else {
+    glutIdleFunc(NULL);
+  }
+}
+
+static void
+recalcModelView(void)
+{
+  glPopMatrix();
+  glPushMatrix();
+  glRotatef(angle, 0.0, 1.0, 0.0);
+  newModel = 0;
+}
+
+static void
+redraw(void)
+{
+  int i;
+
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+  if (newModel)
+    recalcModelView();
+
+  glDepthMask(GL_FALSE);
+
+  /* Draw the floor. */
+/*  glEnable(GL_TEXTURE_2D);*/
+  glColor3f(0.5, 1.0, 0.5);
+  glBegin(GL_QUADS);
+    glTexCoord2f(0.0, 0.0);
+    glVertex3f(-EDGE, -0.05, -EDGE);
+    glTexCoord2f(20.0, 0.0);
+    glVertex3f(EDGE, -0.05, -EDGE);
+    glTexCoord2f(20.0, 20.0);
+    glVertex3f(EDGE, -0.05, EDGE);
+    glTexCoord2f(0.0, 20.0);
+    glVertex3f(-EDGE, -0.05, EDGE);
+  glEnd();
+
+  /* Allow particles to blend with each other. */
+  glDepthMask(GL_TRUE);
+
+  if (blend)
+     glEnable(GL_BLEND);
+
+  glDisable(GL_TEXTURE_2D);
+  glBegin(GL_POINTS);
+    for (i=0; i<numPoints; i++) {
+      /* Draw alive particles. */
+      if (colorList[i] != DEAD) {
+        glColor4fv(colorSet[colorList[i]]);
+        glVertex3fv(pointList[i]);
+      }
+    }
+  glEnd();
+
+  glDisable(GL_BLEND);
+
+  glutSwapBuffers();
+}
+
+/* ARGSUSED2 */
+static void
+mouse(int button, int state, int x, int y)
+{
+  /* Scene can be spun around Y axis using left
+     mouse button movement. */
+  if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN) {
+    moving = 1;
+    begin = x;
+  }
+  if (button == GLUT_LEFT_BUTTON && state == GLUT_UP) {
+    moving = 0;
+  }
+}
+
+/* ARGSUSED1 */
+static void
+mouseMotion(int x, int y)
+{
+  if (moving) {
+    angle = angle + (x - begin);
+    begin = x;
+    newModel = 1;
+    glutPostRedisplay();
+  }
+}
+
+static void
+menu(int option)
+{
+  switch (option) {
+  case 0:
+    makePointList();
+    break;
+#ifdef GL_ARB_point_parameters
+  case 1:
+    glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, constant);
+    break;
+  case 2:
+    glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, linear);
+    break;
+  case 3:
+    glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, theQuad);
+    break;
+#endif
+  case 4:
+    blend = 1;
+    break;
+  case 5:
+    blend = 0;
+    break;
+#ifdef GL_ARB_point_parameters
+  case 6:
+    glPointParameterfARB(GL_POINT_FADE_THRESHOLD_SIZE_ARB, 1.0);
+    break;
+  case 7:
+    glPointParameterfARB(GL_POINT_FADE_THRESHOLD_SIZE_ARB, 10.0);
+    break;
+#endif
+  case 8:
+    glEnable(GL_POINT_SMOOTH);
+    break;
+  case 9:
+    glDisable(GL_POINT_SMOOTH);
+    break;
+  case 10:
+    glPointSize(2.0);
+    break;
+  case 11:
+    glPointSize(4.0);
+    break;
+  case 12:
+    glPointSize(8.0);
+    break;
+  case 13:
+    spin = 1 - spin;
+    if (animate && (spin || motion)) {
+      glutIdleFunc(idle);
+    } else {
+      glutIdleFunc(NULL);
+    }
+    break;
+  case 14:
+    numPoints = 200;
+    break;
+  case 15:
+    numPoints = 500;
+    break;
+  case 16:
+    numPoints = 1000;
+    break;
+  case 17:
+    numPoints = 2000;
+    break;
+  case 666:
+    exit(0);
+  }
+  glutPostRedisplay();
+}
+
+/* ARGSUSED1 */
+static void
+key(unsigned char c, int x, int y)
+{
+  switch (c) {
+  case 13:
+    animate = 1 - animate;  /* toggle. */
+    if (animate && (motion || spin)) {
+      glutIdleFunc(idle);
+    } else {
+      glutIdleFunc(NULL);
+    }
+    break;
+  case ' ':
+    animate = 1;
+    makePointList();
+    glutIdleFunc(idle);
+    break;
+  case 27:
+    exit(0);
+  }
+}
+
+/* Nice floor texture tiling pattern. */
+static char *circles[] = {
+  "....xxxx........",
+  "..xxxxxxxx......",
+  ".xxxxxxxxxx.....",
+  ".xxx....xxx.....",
+  "xxx......xxx....",
+  "xxx......xxx....",
+  "xxx......xxx....",
+  "xxx......xxx....",
+  ".xxx....xxx.....",
+  ".xxxxxxxxxx.....",
+  "..xxxxxxxx......",
+  "....xxxx........",
+  "................",
+  "................",
+  "................",
+  "................",
+};
+
+static void
+makeFloorTexture(void)
+{
+  GLubyte floorTexture[16][16][3];
+  GLubyte *loc;
+  int s, t;
+
+  /* Setup RGB image for the texture. */
+  loc = (GLubyte*) floorTexture;
+  for (t = 0; t < 16; t++) {
+    for (s = 0; s < 16; s++) {
+      if (circles[t][s] == 'x') {
+        /* Nice blue. */
+        loc[0] = 0x1f;
+        loc[1] = 0x1f;
+        loc[2] = 0x8f;
+      } else {
+        /* Light gray. */
+        loc[0] = 0xca;
+        loc[1] = 0xca;
+        loc[2] = 0xca;
+      }
+      loc += 3;
+    }
+  }
+
+  glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+  if (useMipmaps) {
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+      GL_LINEAR_MIPMAP_LINEAR);
+    gluBuild2DMipmaps(GL_TEXTURE_2D, 3, 16, 16,
+      GL_RGB, GL_UNSIGNED_BYTE, floorTexture);
+  } else {
+    if (linearFiltering) {
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    } else {
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    }
+    glTexImage2D(GL_TEXTURE_2D, 0, 3, 16, 16, 0,
+      GL_RGB, GL_UNSIGNED_BYTE, floorTexture);
+  }
+}
+
+int
+main(int argc, char **argv)
+{
+  int i;
+  glutInit(&argc, argv);
+  glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE);
+  glutInitWindowPosition(0, 0);
+  glutInitWindowSize(300, 300);
+
+  for (i=1; i<argc; i++) {
+    if(!strcmp("-noms", argv[i])) {
+      glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+      printf("forcing no multisampling\n");
+    } else if(!strcmp("-nomipmaps", argv[i])) {
+      useMipmaps = 0;
+    } else if(!strcmp("-nearest", argv[i])) {
+      linearFiltering = 0;
+    }
+  }
+
+  glutCreateWindow("point burst");
+  glutDisplayFunc(redraw);
+  glutMouseFunc(mouse);
+  glutMotionFunc(mouseMotion);
+  glutVisibilityFunc(visible);
+  glutKeyboardFunc(key);
+  glutCreateMenu(menu);
+  glutAddMenuEntry("Reset time", 0);
+  glutAddMenuEntry("Constant", 1);
+  glutAddMenuEntry("Linear", 2);
+  glutAddMenuEntry("Quadratic", 3);
+  glutAddMenuEntry("Blend on", 4);
+  glutAddMenuEntry("Blend off", 5);
+  glutAddMenuEntry("Threshold 1", 6);
+  glutAddMenuEntry("Threshold 10", 7);
+  glutAddMenuEntry("Point smooth on", 8);
+  glutAddMenuEntry("Point smooth off", 9);
+  glutAddMenuEntry("Point size 2", 10);
+  glutAddMenuEntry("Point size 4", 11);
+  glutAddMenuEntry("Point size 8", 12);
+  glutAddMenuEntry("Toggle spin", 13);
+  glutAddMenuEntry("200 points ", 14);
+  glutAddMenuEntry("500 points ", 15);
+  glutAddMenuEntry("1000 points ", 16);
+  glutAddMenuEntry("2000 points ", 17);
+  glutAddMenuEntry("Quit", 666);
+  glutAttachMenu(GLUT_RIGHT_BUTTON);
+
+  glShadeModel(GL_FLAT);
+  glEnable(GL_DEPTH_TEST);
+  glEnable(GL_POINT_SMOOTH);
+  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+  glPointSize(8.0);
+#if GL_ARB_point_parameters
+  glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, theQuad);
+#endif
+  glMatrixMode(GL_PROJECTION);
+  gluPerspective( /* field of view in degree */ 40.0,
+  /* aspect ratio */ 1.0,
+    /* Z near */ 0.5, /* Z far */ 40.0);
+  glMatrixMode(GL_MODELVIEW);
+  gluLookAt(0.0, 1.0, 8.0, /* eye location */
+    0.0, 1.0, 0.0,      /* center is at (0,0,0) */
+    0.0, 1.0, 0.);      /* up is in postivie Y direction */
+  glPushMatrix();       /* dummy push so we can pop on model
+                           recalc */
+
+  makePointList();
+  makeFloorTexture();
+
+  glutMainLoop();
+  return 0;             /* ANSI C requires main to return int. */
+}
diff --git a/progs/demos/rain.cxx b/progs/demos/rain.cxx
new file mode 100644
index 000000000..d19f049c5
--- /dev/null
+++ b/progs/demos/rain.cxx
@@ -0,0 +1,394 @@
+/*
+ * This program is under the GNU GPL.
+ * Use at your own risk.
+ *
+ * written by David Bucciarelli (humanware@plus.it)
+ *            Humanware s.r.l.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <time.h>
+#include <GL/glut.h>
+#ifndef M_PI
+#define M_PI 3.14159265
+#endif
+
+#include "particles.h"
+extern "C" {
+#include "readtex.h"
+}
+
+#ifdef _WIN32
+#include <windows.h>
+#include <mmsystem.h>
+#include "particles.cxx"
+#include "readtex.c"
+#endif
+
+#ifdef XMESA
+#include "GL/xmesa.h"
+static int fullscreen=1;
+#endif
+
+static int WIDTH=640;
+static int HEIGHT=480;
+static int NUMPART=7500;
+
+#define FRAME 50
+
+static float fogcolor[4]={1.0,1.0,1.0,1.0};
+
+#define DIMP 40.0
+#define DIMTP 32.0
+
+static float q[4][3]={
+  {-DIMP,0.0,-DIMP},
+  {DIMP,0.0,-DIMP},
+  {DIMP,0.0,DIMP},
+  {-DIMP,0.0,DIMP}
+};
+
+static float qt[4][2]={
+  {-DIMTP,-DIMTP},
+  {DIMTP,-DIMTP},
+  {DIMTP,DIMTP},
+  {-DIMTP,DIMTP}
+};
+
+static int win=0;
+
+static int fog=1;
+static int help=1;
+
+static GLuint groundid;
+
+static float obs[3]={2.0,1.0,0.0};
+static float dir[3];
+static float v=0.0;
+static float alpha=-90.0;
+static float beta=90.0;
+
+static particleSystem *ps;
+
+static float gettime()
+{
+  static clock_t told=0;
+  clock_t tnew,ris;
+
+  tnew=clock();
+
+  ris=tnew-told;
+
+  told=tnew;
+
+  return(ris/(float)CLOCKS_PER_SEC);
+}
+
+static float gettimerain()
+{
+  static clock_t told=0;
+  clock_t tnew,ris;
+
+  tnew=clock();
+
+  ris=tnew-told;
+
+  told=tnew;
+
+  return(ris/(float)CLOCKS_PER_SEC);
+}
+
+static void calcposobs(void)
+{
+  dir[0]=sin(alpha*M_PI/180.0);
+  dir[2]=cos(alpha*M_PI/180.0)*sin(beta*M_PI/180.0);
+  dir[1]=cos(beta*M_PI/180.0);
+
+  obs[0]+=v*dir[0];
+  obs[1]+=v*dir[1];
+  obs[2]+=v*dir[2];
+
+  rainParticle::setRainingArea(obs[0]-7.0f,-0.2f,obs[2]-7.0f,obs[0]+7.0f,8.0f,obs[2]+7.0f);
+}
+
+static void printstring(void *font, char *string)
+{
+  int len,i;
+
+  len=(int)strlen(string);
+  for(i=0;i<len;i++)
+    glutBitmapCharacter(font,string[i]);
+}
+
+static void reshape(int width, int height)
+{
+  WIDTH=width;
+  HEIGHT=height;
+  glViewport(0,0,(GLint)width,(GLint)height);
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  gluPerspective(70.0,width/(float)height,0.1,30.0);
+
+  glMatrixMode(GL_MODELVIEW);
+}
+
+static void printhelp(void)
+{
+  glEnable(GL_BLEND);
+  glColor4f(0.0,0.0,0.0,0.5);
+  glRecti(40,40,600,440);
+  glDisable(GL_BLEND);
+
+  glColor3f(1.0,0.0,0.0);
+  glRasterPos2i(300,420);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"Help");
+
+  glRasterPos2i(60,390);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"h - Toggle Help");
+
+  glRasterPos2i(60,360);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"f - Toggle Fog");
+  glRasterPos2i(60,330);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"Arrow Keys - Rotate");
+  glRasterPos2i(60,300);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"a - Increase velocity");
+  glRasterPos2i(60,270);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"z - Decrease velocity");
+  glRasterPos2i(60,240);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"l - Increase rain length");
+  glRasterPos2i(60,210);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"k - Increase rain length");
+}
+
+static void drawrain(void)
+{
+  static int count=0;
+  static char frbuf[80];
+  float fr;
+
+  glEnable(GL_DEPTH_TEST);
+
+  if(fog)
+    glEnable(GL_FOG);
+  else
+    glDisable(GL_FOG);
+
+  glDepthMask(GL_TRUE);
+  glClearColor(1.0,1.0,1.0,1.0);
+  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
+
+  glPushMatrix();
+  calcposobs();
+  gluLookAt(obs[0],obs[1],obs[2],
+	    obs[0]+dir[0],obs[1]+dir[1],obs[2]+dir[2],
+	    0.0,1.0,0.0);
+
+  glColor4f(1.0,1.0,1.0,1.0);
+
+  glEnable(GL_TEXTURE_2D);
+
+  glBindTexture(GL_TEXTURE_2D,groundid);
+  glBegin(GL_QUADS);
+  glTexCoord2fv(qt[0]);
+  glVertex3fv(q[0]);
+  glTexCoord2fv(qt[1]);
+  glVertex3fv(q[1]);
+  glTexCoord2fv(qt[2]);
+  glVertex3fv(q[2]);
+  glTexCoord2fv(qt[3]);
+  glVertex3fv(q[3]);
+  glEnd();
+
+  // Particle System
+
+  glDisable(GL_TEXTURE_2D);
+  glShadeModel(GL_SMOOTH);
+  glEnable(GL_BLEND);
+
+  ps->draw();
+  ps->addTime(gettimerain());
+  
+  glShadeModel(GL_FLAT);
+ 
+
+  if((count % FRAME)==0) {
+    fr=gettime();
+    sprintf(frbuf,"Frame rate: %f",FRAME/fr);
+  }
+
+  glDisable(GL_TEXTURE_2D);
+  glDisable(GL_DEPTH_TEST);
+  glDisable(GL_FOG);
+
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  glOrtho(-0.5,639.5,-0.5,479.5,-1.0,1.0);
+  glMatrixMode(GL_MODELVIEW);
+  glLoadIdentity();
+
+  glColor3f(1.0,0.0,0.0);
+  glRasterPos2i(10,10);
+  printstring(GLUT_BITMAP_HELVETICA_18,frbuf);
+  glRasterPos2i(350,470);
+  printstring(GLUT_BITMAP_HELVETICA_10,"Rain V1.0 Written by David Bucciarelli (humanware@plus.it)");
+
+  if(help)
+    printhelp();
+
+  reshape(WIDTH,HEIGHT);
+  glPopMatrix();
+
+  glutSwapBuffers();
+
+  count++;
+}
+
+
+static void special(int key, int x, int y)
+{
+  switch (key) {
+  case GLUT_KEY_LEFT:
+    alpha+=2.0;
+    break;
+  case GLUT_KEY_RIGHT:
+    alpha-=2.0;
+    break;
+  case GLUT_KEY_DOWN:
+    beta-=2.0;
+    break;
+  case GLUT_KEY_UP:
+    beta+=2.0;
+    break;
+  }
+}
+
+static void key(unsigned char key, int x, int y)
+{
+  switch (key) {
+  case 27:
+    exit(0);
+    break;
+
+  case 'a':
+    v+=0.01;
+    break;
+  case 'z':
+    v-=0.01;
+    break;
+
+  case 'l':
+    rainParticle::setLength(rainParticle::getLength()+0.025f);
+    break;
+  case 'k':
+    rainParticle::setLength(rainParticle::getLength()-0.025f);
+    break;
+
+  case 'h':
+    help=(!help);
+    break;
+  case 'f':
+    fog=(!fog);
+    break;
+#ifdef XMESA
+  case ' ':
+    XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
+    fullscreen=(!fullscreen);
+    break;
+#endif
+  }
+}
+
+static void inittextures(void)
+{
+  GLubyte *img;
+  GLint width,height;
+  GLenum format;
+  GLenum gluerr;
+
+  glGenTextures(1,&groundid);
+  glBindTexture(GL_TEXTURE_2D,groundid);
+
+  if(!(img=LoadRGBImage("../images/s128.rgb",&width,&height,&format))){
+  	fprintf(stderr,"Error reading a texture.\n");
+  	exit(-1);
+  }
+  glPixelStorei(GL_UNPACK_ALIGNMENT,4);
+  if((gluerr=(GLenum)gluBuild2DMipmaps(GL_TEXTURE_2D, 3, width, height,GL_RGB,
+			       GL_UNSIGNED_BYTE, (GLvoid *)(img)))) {
+    fprintf(stderr,"GLULib%s\n",gluErrorString(gluerr));
+    exit(-1);
+  }
+
+  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT);
+  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);
+
+  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR);
+  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
+
+  glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_DECAL);
+}
+
+static void initparticle(void)
+{
+  ps=new particleSystem;
+
+  rainParticle::setRainingArea(-7.0f,-0.2f,-7.0f,7.0f,8.0f,7.0f);
+
+  for(int i=0;i<NUMPART;i++) {
+    rainParticle *p=new rainParticle;
+    p->randomHeight();
+
+    ps->addParticle((particle *)p);
+  }
+}
+
+int main(int ac,char **av)
+{
+  fprintf(stderr,"Rain V1.0\nWritten by David Bucciarelli (humanware@plus.it)\n");
+
+  /* Default settings */
+
+  WIDTH=640;
+  HEIGHT=480;
+
+  glutInitWindowPosition(0,0);
+  glutInitWindowSize(WIDTH,HEIGHT);
+  glutInit(&ac,av);
+
+  glutInitDisplayMode(GLUT_RGB|GLUT_DEPTH|GLUT_DOUBLE);
+
+  if(!(win=glutCreateWindow("Rain"))) {
+    fprintf(stderr,"Error opening a window.\n");
+    exit(-1);
+  }
+  
+  reshape(WIDTH,HEIGHT);
+
+  inittextures();
+
+  glShadeModel(GL_FLAT);
+  glEnable(GL_DEPTH_TEST);
+
+  glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
+
+  glEnable(GL_FOG);
+  glFogi(GL_FOG_MODE,GL_EXP);
+  glFogfv(GL_FOG_COLOR,fogcolor);
+  glFogf(GL_FOG_DENSITY,0.1);
+#ifdef FX
+  glHint(GL_FOG_HINT,GL_NICEST);
+#endif
+
+  initparticle();
+
+  glutKeyboardFunc(key);
+  glutSpecialFunc(special);
+  glutDisplayFunc(drawrain);
+  glutIdleFunc(drawrain);
+  glutReshapeFunc(reshape);
+  glutMainLoop();
+
+  return(0);
+}
diff --git a/progs/demos/ray.c b/progs/demos/ray.c
new file mode 100644
index 000000000..eb1d19f86
--- /dev/null
+++ b/progs/demos/ray.c
@@ -0,0 +1,902 @@
+/*
+ * This program is under the GNU GPL.
+ * Use at your own risk.
+ *
+ * written by David Bucciarelli (tech.hmw@plus.it)
+ *            Humanware s.r.l.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+#ifdef WIN32
+#include <windows.h>
+#endif
+
+#include <GL/glut.h>
+
+#ifdef XMESA
+#include "GL/xmesa.h"
+static int fullscreen = 1;
+#endif
+
+static int WIDTH = 640;
+static int HEIGHT = 480;
+
+static GLint T0 = 0;
+static GLint Frames = 0;
+
+#define BASESIZE 7.5f
+#define SPHERE_RADIUS 0.75f
+
+#define TEX_CHECK_WIDTH 256
+#define TEX_CHECK_HEIGHT 256
+#define TEX_CHECK_SLOT_SIZE (TEX_CHECK_HEIGHT/16)
+#define TEX_CHECK_NUMSLOT (TEX_CHECK_HEIGHT/TEX_CHECK_SLOT_SIZE)
+
+#define TEX_REFLECT_WIDTH 256
+#define TEX_REFLECT_HEIGHT 256
+#define TEX_REFLECT_SLOT_SIZE (TEX_REFLECT_HEIGHT/16)
+#define TEX_REFLECT_NUMSLOT (TEX_REFLECT_HEIGHT/TEX_REFLECT_SLOT_SIZE)
+
+#ifndef M_PI
+#define M_PI 3.1415926535
+#endif
+
+#define EPSILON 0.0001
+
+#define clamp255(a)  ( (a)<(0.0f) ? (0.0f) : ((a)>(255.0f) ? (255.0f) : (a)) )
+
+#define fabs(x) ((x)<0.0f?-(x):(x))
+
+#define vequ(a,b) { (a)[0]=(b)[0]; (a)[1]=(b)[1]; (a)[2]=(b)[2]; }
+#define vsub(a,b,c) { (a)[0]=(b)[0]-(c)[0]; (a)[1]=(b)[1]-(c)[1]; (a)[2]=(b)[2]-(c)[2]; }
+#define	dprod(a,b) ((a)[0]*(b)[0]+(a)[1]*(b)[1]+(a)[2]*(b)[2])
+#define vnormalize(a,b) { \
+  register float m_norm; \
+  m_norm=sqrt((double)dprod((a),(a))); \
+  (a)[0] /=m_norm; \
+  (a)[1] /=m_norm; \
+  (a)[2] /=m_norm; }
+
+static GLubyte checkmap[TEX_CHECK_HEIGHT][TEX_CHECK_WIDTH][3];
+static GLuint checkid;
+static int checkmap_currentslot = 0;
+
+static GLubyte reflectmap[TEX_REFLECT_HEIGHT][TEX_REFLECT_WIDTH][3];
+static GLuint reflectid;
+static int reflectmap_currentslot = 0;
+
+static GLuint lightdlist;
+static GLuint objdlist;
+
+static float lightpos[3] = { 2.1, 2.1, 2.8 };
+static float objpos[3] = { 0.0, 0.0, 1.0 };
+
+static float sphere_pos[TEX_CHECK_HEIGHT][TEX_REFLECT_WIDTH][3];
+
+static int win = 0;
+
+static float fogcolor[4] = { 0.05, 0.05, 0.05, 1.0 };
+
+static float obs[3] = { 7.0, 0.0, 2.0 };
+static float dir[3];
+static float v = 0.0;
+static float alpha = -90.0;
+static float beta = 90.0;
+
+static int fog = 1;
+static int bfcull = 1;
+static int poutline = 0;
+static int help = 1;
+static int showcheckmap = 1;
+static int showreflectmap = 1;
+static int joyavailable = 0;
+static int joyactive = 0;
+
+static void
+calcposobs(void)
+{
+   dir[0] = sin(alpha * M_PI / 180.0);
+   dir[1] = cos(alpha * M_PI / 180.0) * sin(beta * M_PI / 180.0);
+   dir[2] = cos(beta * M_PI / 180.0);
+
+   if (dir[0] < 1.0e-5 && dir[0] > -1.0e-5)
+      dir[0] = 0;
+   if (dir[1] < 1.0e-5 && dir[1] > -1.0e-5)
+      dir[1] = 0;
+   if (dir[2] < 1.0e-5 && dir[2] > -1.0e-5)
+      dir[2] = 0;
+
+   obs[0] += v * dir[0];
+   obs[1] += v * dir[1];
+   obs[2] += v * dir[2];
+}
+
+static void
+special(int k, int x, int y)
+{
+   switch (k) {
+   case GLUT_KEY_LEFT:
+      alpha -= 2.0;
+      break;
+   case GLUT_KEY_RIGHT:
+      alpha += 2.0;
+      break;
+   case GLUT_KEY_DOWN:
+      beta -= 2.0;
+      break;
+   case GLUT_KEY_UP:
+      beta += 2.0;
+      break;
+   }
+}
+
+static void
+key(unsigned char k, int x, int y)
+{
+   switch (k) {
+   case 27:
+      exit(0);
+      break;
+
+   case 's':
+      lightpos[1] -= 0.1;
+      break;
+   case 'd':
+      lightpos[1] += 0.1;
+      break;
+   case 'e':
+      lightpos[0] -= 0.1;
+      break;
+   case 'x':
+      lightpos[0] += 0.1;
+      break;
+   case 'w':
+      lightpos[2] -= 0.1;
+      break;
+   case 'r':
+      lightpos[2] += 0.1;
+      break;
+
+   case 'j':
+      objpos[1] -= 0.1;
+      break;
+   case 'k':
+      objpos[1] += 0.1;
+      break;
+   case 'i':
+      objpos[0] -= 0.1;
+      break;
+   case 'm':
+      objpos[0] += 0.1;
+      break;
+   case 'u':
+      objpos[2] -= 0.1;
+      break;
+   case 'o':
+      objpos[2] += 0.1;
+      break;
+
+   case 'a':
+      v += 0.005;
+      break;
+   case 'z':
+      v -= 0.005;
+      break;
+
+   case 'g':
+      joyactive = (!joyactive);
+      break;
+   case 'h':
+      help = (!help);
+      break;
+   case 'f':
+      fog = (!fog);
+      break;
+
+   case '1':
+      showcheckmap = (!showcheckmap);
+      break;
+   case '2':
+      showreflectmap = (!showreflectmap);
+      break;
+
+   case 'b':
+      if (bfcull) {
+	 glDisable(GL_CULL_FACE);
+	 bfcull = 0;
+      }
+      else {
+	 glEnable(GL_CULL_FACE);
+	 bfcull = 1;
+      }
+      break;
+   case 'p':
+      if (poutline) {
+	 glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+	 poutline = 0;
+      }
+      else {
+	 glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+	 poutline = 1;
+      }
+      break;
+#ifdef XMESA
+   case ' ':
+      XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
+      fullscreen = (!fullscreen);
+      break;
+#endif
+   }
+}
+
+static void
+reshape(int w, int h)
+{
+   WIDTH = w;
+   HEIGHT = h;
+   glViewport(0, 0, w, h);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluPerspective(45.0, w / (float) h, 0.8, 40.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+}
+
+static void
+printstring(void *font, char *string)
+{
+   int len, i;
+
+   len = (int) strlen(string);
+   for (i = 0; i < len; i++)
+      glutBitmapCharacter(font, string[i]);
+}
+
+static void
+printhelp(void)
+{
+   glEnable(GL_BLEND);
+   glColor4f(0.5, 0.5, 0.5, 0.5);
+   glRecti(40, 40, 600, 440);
+   glDisable(GL_BLEND);
+
+   glColor3f(0.0, 0.0, 1.0);
+   glRasterPos2i(300, 420);
+   printstring(GLUT_BITMAP_HELVETICA_18, "Help");
+
+   glRasterPos2i(60, 390);
+   printstring(GLUT_BITMAP_HELVETICA_12, "h - Toggle Help");
+   glRasterPos2i(60, 370);
+   printstring(GLUT_BITMAP_HELVETICA_12, "f - Toggle Fog");
+   glRasterPos2i(60, 350);
+   printstring(GLUT_BITMAP_HELVETICA_12, "b - Toggle Back face culling");
+   glRasterPos2i(60, 330);
+   printstring(GLUT_BITMAP_HELVETICA_12, "p - Toggle Wire frame");
+   glRasterPos2i(60, 310);
+   printstring(GLUT_BITMAP_HELVETICA_12, "Arrow Keys - Rotate");
+   glRasterPos2i(60, 290);
+   printstring(GLUT_BITMAP_HELVETICA_12, "a - Increase velocity");
+   glRasterPos2i(60, 270);
+   printstring(GLUT_BITMAP_HELVETICA_12, "z - Decrease velocity");
+
+   glRasterPos2i(60, 250);
+   if (joyavailable)
+      printstring(GLUT_BITMAP_HELVETICA_12,
+		  "j - Toggle jostick control (Joystick control available)");
+   else
+      printstring(GLUT_BITMAP_HELVETICA_12,
+		  "(No Joystick control available)");
+
+   glRasterPos2i(60, 230);
+   printstring(GLUT_BITMAP_HELVETICA_12,
+	       "To move the light source: s - left,  d - right,  e - far,  x - near,  w - down r - up");
+   glRasterPos2i(60, 210);
+   printstring(GLUT_BITMAP_HELVETICA_12,
+	       "To move the mirror sphere: j - left,  k - right,  i - far,  m - near,  u - down o - up");
+
+   glRasterPos2i(60, 190);
+   printstring(GLUT_BITMAP_HELVETICA_12,
+	       "1 - Toggle the plane texture map window");
+
+   glRasterPos2i(60, 170);
+   printstring(GLUT_BITMAP_HELVETICA_12,
+	       "2 - Toggle the sphere texture map window");
+}
+
+static GLboolean
+seelight(float p[3], float dir[3])
+{
+   float c[3], b, a, d, t, dist[3];
+
+   vsub(c, p, objpos);
+   b = -dprod(c, dir);
+   a = dprod(c, c) - SPHERE_RADIUS * SPHERE_RADIUS;
+
+   if ((d = b * b - a) < 0.0 || (b < 0.0 && a > 0.0))
+      return GL_FALSE;
+
+   d = sqrt(d);
+
+   t = b - d;
+
+   if (t < EPSILON) {
+      t = b + d;
+      if (t < EPSILON)
+	 return GL_FALSE;
+   }
+
+   vsub(dist, lightpos, p);
+   if (dprod(dist, dist) < t * t)
+      return GL_FALSE;
+
+   return GL_TRUE;
+}
+
+static int
+colorcheckmap(float ppos[3], float c[3])
+{
+   static float norm[3] = { 0.0f, 0.0f, 1.0f };
+   float ldir[3], vdir[3], h[3], dfact, kfact, r, g, b;
+   int x, y;
+
+   x = (int) ((ppos[0] + BASESIZE / 2) * (10.0f / BASESIZE));
+   if ((x < 0) || (x > 10))
+      return GL_FALSE;
+
+   y = (int) ((ppos[1] + BASESIZE / 2) * (10.0f / BASESIZE));
+   if ((y < 0) || (y > 10))
+      return GL_FALSE;
+
+   r = 255.0f;
+   if (y & 1) {
+      if (x & 1)
+	 g = 255.0f;
+      else
+	 g = 0.0f;
+   }
+   else {
+      if (x & 1)
+	 g = 0.0f;
+      else
+	 g = 255.0f;
+   }
+   b = 0.0f;
+
+   vsub(ldir, lightpos, ppos);
+   vnormalize(ldir, ldir);
+
+   if (seelight(ppos, ldir)) {
+      c[0] = r * 0.05f;
+      c[1] = g * 0.05f;
+      c[2] = b * 0.05f;
+
+      return GL_TRUE;
+   }
+
+   dfact = dprod(ldir, norm);
+   if (dfact < 0.0f)
+      dfact = 0.0f;
+
+   vsub(vdir, obs, ppos);
+   vnormalize(vdir, vdir);
+   h[0] = 0.5f * (vdir[0] + ldir[0]);
+   h[1] = 0.5f * (vdir[1] + ldir[1]);
+   h[2] = 0.5f * (vdir[2] + ldir[2]);
+   kfact = dprod(h, norm);
+   kfact = pow(kfact, 6.0) * 7.0 * 255.0;
+
+   r = r * dfact + kfact;
+   g = g * dfact + kfact;
+   b = b * dfact + kfact;
+
+   c[0] = clamp255(r);
+   c[1] = clamp255(g);
+   c[2] = clamp255(b);
+
+   return GL_TRUE;
+}
+
+static void
+updatecheckmap(int slot)
+{
+   float c[3], ppos[3];
+   int x, y;
+
+   glBindTexture(GL_TEXTURE_2D, checkid);
+
+   ppos[2] = 0.0f;
+   for (y = slot * TEX_CHECK_SLOT_SIZE; y < (slot + 1) * TEX_CHECK_SLOT_SIZE;
+	y++) {
+      ppos[1] = (y / (float) TEX_CHECK_HEIGHT) * BASESIZE - BASESIZE / 2;
+
+      for (x = 0; x < TEX_CHECK_WIDTH; x++) {
+	 ppos[0] = (x / (float) TEX_CHECK_WIDTH) * BASESIZE - BASESIZE / 2;
+
+	 colorcheckmap(ppos, c);
+	 checkmap[y][x][0] = (GLubyte) c[0];
+	 checkmap[y][x][1] = (GLubyte) c[1];
+	 checkmap[y][x][2] = (GLubyte) c[2];
+      }
+   }
+
+   glTexSubImage2D(GL_TEXTURE_2D, 0, 0, slot * TEX_CHECK_SLOT_SIZE,
+		   TEX_CHECK_WIDTH, TEX_CHECK_SLOT_SIZE, GL_RGB,
+		   GL_UNSIGNED_BYTE,
+		   &checkmap[slot * TEX_CHECK_SLOT_SIZE][0][0]);
+
+}
+
+static void
+updatereflectmap(int slot)
+{
+   float rf, r, g, b, t, dfact, kfact, rdir[3];
+   float rcol[3], ppos[3], norm[3], ldir[3], h[3], vdir[3], planepos[3];
+   int x, y;
+
+   glBindTexture(GL_TEXTURE_2D, reflectid);
+
+   for (y = slot * TEX_REFLECT_SLOT_SIZE;
+	y < (slot + 1) * TEX_REFLECT_SLOT_SIZE; y++)
+      for (x = 0; x < TEX_REFLECT_WIDTH; x++) {
+	 ppos[0] = sphere_pos[y][x][0] + objpos[0];
+	 ppos[1] = sphere_pos[y][x][1] + objpos[1];
+	 ppos[2] = sphere_pos[y][x][2] + objpos[2];
+
+	 vsub(norm, ppos, objpos);
+	 vnormalize(norm, norm);
+
+	 vsub(ldir, lightpos, ppos);
+	 vnormalize(ldir, ldir);
+	 vsub(vdir, obs, ppos);
+	 vnormalize(vdir, vdir);
+
+	 rf = 2.0f * dprod(norm, vdir);
+	 if (rf > EPSILON) {
+	    rdir[0] = rf * norm[0] - vdir[0];
+	    rdir[1] = rf * norm[1] - vdir[1];
+	    rdir[2] = rf * norm[2] - vdir[2];
+
+	    t = -objpos[2] / rdir[2];
+
+	    if (t > EPSILON) {
+	       planepos[0] = objpos[0] + t * rdir[0];
+	       planepos[1] = objpos[1] + t * rdir[1];
+	       planepos[2] = 0.0f;
+
+	       if (!colorcheckmap(planepos, rcol))
+		  rcol[0] = rcol[1] = rcol[2] = 0.0f;
+	    }
+	    else
+	       rcol[0] = rcol[1] = rcol[2] = 0.0f;
+	 }
+	 else
+	    rcol[0] = rcol[1] = rcol[2] = 0.0f;
+
+	 dfact = 0.1f * dprod(ldir, norm);
+
+	 if (dfact < 0.0f) {
+	    dfact = 0.0f;
+	    kfact = 0.0f;
+	 }
+	 else {
+	    h[0] = 0.5f * (vdir[0] + ldir[0]);
+	    h[1] = 0.5f * (vdir[1] + ldir[1]);
+	    h[2] = 0.5f * (vdir[2] + ldir[2]);
+	    kfact = dprod(h, norm);
+            kfact = pow(kfact, 4.0);
+            if (kfact < 1.0e-10)
+               kfact = 0.0;
+         }
+
+	 r = dfact + kfact;
+	 g = dfact + kfact;
+	 b = dfact + kfact;
+
+	 r *= 255.0f;
+	 g *= 255.0f;
+	 b *= 255.0f;
+
+	 r += rcol[0];
+	 g += rcol[1];
+	 b += rcol[2];
+
+	 r = clamp255(r);
+	 g = clamp255(g);
+	 b = clamp255(b);
+
+	 reflectmap[y][x][0] = (GLubyte) r;
+	 reflectmap[y][x][1] = (GLubyte) g;
+	 reflectmap[y][x][2] = (GLubyte) b;
+      }
+
+   glTexSubImage2D(GL_TEXTURE_2D, 0, 0, slot * TEX_REFLECT_SLOT_SIZE,
+		   TEX_REFLECT_WIDTH, TEX_REFLECT_SLOT_SIZE, GL_RGB,
+		   GL_UNSIGNED_BYTE,
+		   &reflectmap[slot * TEX_REFLECT_SLOT_SIZE][0][0]);
+}
+
+static void
+drawbase(void)
+{
+   glColor3f(0.0, 0.0, 0.0);
+   glBindTexture(GL_TEXTURE_2D, checkid);
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+
+   glBegin(GL_QUADS);
+   glTexCoord2f(0.0f, 0.0f);
+   glVertex3f(-BASESIZE / 2.0f, -BASESIZE / 2.0f, 0.0f);
+
+   glTexCoord2f(1.0f, 0.0f);
+   glVertex3f(BASESIZE / 2.0f, -BASESIZE / 2.0f, 0.0f);
+
+   glTexCoord2f(1.0f, 1.0f);
+   glVertex3f(BASESIZE / 2.0f, BASESIZE / 2.0f, 0.0f);
+
+   glTexCoord2f(0.0f, 1.0f);
+   glVertex3f(-BASESIZE / 2.0f, BASESIZE / 2.0f, 0.0f);
+
+   glEnd();
+}
+
+static void
+drawobj(void)
+{
+   glColor3f(0.0, 0.0, 0.0);
+   glBindTexture(GL_TEXTURE_2D, reflectid);
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+
+   glPushMatrix();
+   glTranslatef(objpos[0], objpos[1], objpos[2]);
+   glCallList(objdlist);
+   glPopMatrix();
+}
+
+static void
+dojoy(void)
+{
+#ifdef WIN32
+   static UINT max[2] = { 0, 0 };
+   static UINT min[2] = { 0xffffffff, 0xffffffff }, center[2];
+   MMRESULT res;
+   JOYINFO joy;
+
+   res = joyGetPos(JOYSTICKID1, &joy);
+
+   if (res == JOYERR_NOERROR) {
+      joyavailable = 1;
+
+      if (max[0] < joy.wXpos)
+	 max[0] = joy.wXpos;
+      if (min[0] > joy.wXpos)
+	 min[0] = joy.wXpos;
+      center[0] = (max[0] + min[0]) / 2;
+
+      if (max[1] < joy.wYpos)
+	 max[1] = joy.wYpos;
+      if (min[1] > joy.wYpos)
+	 min[1] = joy.wYpos;
+      center[1] = (max[1] + min[1]) / 2;
+
+      if (joyactive) {
+	 if (fabs(center[0] - (float) joy.wXpos) > 0.1 * (max[0] - min[0]))
+	    alpha -=
+	       2.5 * (center[0] - (float) joy.wXpos) / (max[0] - min[0]);
+	 if (fabs(center[1] - (float) joy.wYpos) > 0.1 * (max[1] - min[1]))
+	    beta += 2.5 * (center[1] - (float) joy.wYpos) / (max[1] - min[1]);
+
+	 if (joy.wButtons & JOY_BUTTON1)
+	    v += 0.005;
+	 if (joy.wButtons & JOY_BUTTON2)
+	    v -= 0.005;
+      }
+   }
+   else
+      joyavailable = 0;
+#endif
+}
+
+static void
+updatemaps(void)
+{
+   updatecheckmap(checkmap_currentslot);
+   checkmap_currentslot = (checkmap_currentslot + 1) % TEX_CHECK_NUMSLOT;
+
+   updatereflectmap(reflectmap_currentslot);
+   reflectmap_currentslot =
+      (reflectmap_currentslot + 1) % TEX_REFLECT_NUMSLOT;
+}
+
+static void
+draw(void)
+{
+   static char frbuf[80] = "";
+
+   dojoy();
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glEnable(GL_TEXTURE_2D);
+   glEnable(GL_DEPTH_TEST);
+   if (fog)
+      glEnable(GL_FOG);
+   else
+      glDisable(GL_FOG);
+
+   glPushMatrix();
+   calcposobs();
+
+   gluLookAt(obs[0], obs[1], obs[2],
+	     obs[0] + dir[0], obs[1] + dir[1], obs[2] + dir[2],
+	     0.0, 0.0, 1.0);
+
+   drawbase();
+   drawobj();
+
+   glColor3f(1.0, 1.0, 1.0);
+   glDisable(GL_TEXTURE_2D);
+
+   glPushMatrix();
+   glTranslatef(lightpos[0], lightpos[1], lightpos[2]);
+   glCallList(lightdlist);
+   glPopMatrix();
+
+   glPopMatrix();
+
+   glDisable(GL_DEPTH_TEST);
+   glDisable(GL_FOG);
+
+   glMatrixMode(GL_PROJECTION);
+   glPushMatrix();
+   glLoadIdentity();
+   glOrtho(-0.5, 639.5, -0.5, 479.5, -1.0, 1.0);
+   glMatrixMode(GL_MODELVIEW);
+
+   glColor3f(0.0f, 0.3f, 1.0f);
+
+   if (showcheckmap) {
+      glEnable(GL_TEXTURE_2D);
+      glBindTexture(GL_TEXTURE_2D, checkid);
+      glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+
+      glBegin(GL_QUADS);
+      glTexCoord2f(1.0f, 0.0f);
+      glVertex2i(10, 30);
+      glTexCoord2f(1.0f, 1.0f);
+      glVertex2i(10 + 90, 30);
+      glTexCoord2f(0.0f, 1.0f);
+      glVertex2i(10 + 90, 30 + 90);
+      glTexCoord2f(0.0f, 0.0f);
+      glVertex2i(10, 30 + 90);
+      glEnd();
+
+      glDisable(GL_TEXTURE_2D);
+      glBegin(GL_LINE_LOOP);
+      glVertex2i(10, 30);
+      glVertex2i(10 + 90, 30);
+      glVertex2i(10 + 90, 30 + 90);
+      glVertex2i(10, 30 + 90);
+      glEnd();
+      glRasterPos2i(105, 65);
+      printstring(GLUT_BITMAP_HELVETICA_18, "Plane Texture Map");
+   }
+
+   if (showreflectmap) {
+      glEnable(GL_TEXTURE_2D);
+      glBindTexture(GL_TEXTURE_2D, reflectid);
+      glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+
+      glBegin(GL_QUADS);
+      glTexCoord2f(1.0f, 0.0f);
+      glVertex2i(540, 30);
+      glTexCoord2f(1.0f, 1.0f);
+      glVertex2i(540 + 90, 30);
+      glTexCoord2f(0.0f, 1.0f);
+      glVertex2i(540 + 90, 30 + 90);
+      glTexCoord2f(0.0f, 0.0f);
+      glVertex2i(540, 30 + 90);
+      glEnd();
+
+      glDisable(GL_TEXTURE_2D);
+      glBegin(GL_LINE_LOOP);
+      glVertex2i(540, 30);
+      glVertex2i(540 + 90, 30);
+      glVertex2i(540 + 90, 30 + 90);
+      glVertex2i(540, 30 + 90);
+      glEnd();
+      glRasterPos2i(360, 65);
+      printstring(GLUT_BITMAP_HELVETICA_18, "Sphere Texture Map");
+   }
+
+   glDisable(GL_TEXTURE_2D);
+
+   glRasterPos2i(10, 10);
+   printstring(GLUT_BITMAP_HELVETICA_18, frbuf);
+   glRasterPos2i(360, 470);
+   printstring(GLUT_BITMAP_HELVETICA_10,
+	       "Ray V1.0 Written by David Bucciarelli (tech.hmw@plus.it)");
+
+   if (help)
+      printhelp();
+
+   glMatrixMode(GL_PROJECTION);
+   glPopMatrix();
+   glMatrixMode(GL_MODELVIEW);
+
+   updatemaps();
+
+   glutSwapBuffers();
+
+   Frames++;
+   {
+      GLint t = glutGet(GLUT_ELAPSED_TIME);
+      if (t - T0 >= 2000) {
+         GLfloat seconds = (t - T0) / 1000.0;
+         GLfloat fps = Frames / seconds;
+         sprintf(frbuf, "Frame rate: %f", fps);
+         T0 = t;
+         Frames = 0;
+      }
+   }
+}
+
+static void
+inittextures(void)
+{
+   int y;
+
+   glGenTextures(1, &checkid);
+   glBindTexture(GL_TEXTURE_2D, checkid);
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   glTexImage2D(GL_TEXTURE_2D, 0, 3, TEX_CHECK_WIDTH, TEX_CHECK_HEIGHT,
+		0, GL_RGB, GL_UNSIGNED_BYTE, checkmap);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   for (y = 0; y < TEX_CHECK_NUMSLOT; y++)
+      updatecheckmap(y);
+
+
+
+   glGenTextures(1, &reflectid);
+   glBindTexture(GL_TEXTURE_2D, reflectid);
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   glTexImage2D(GL_TEXTURE_2D, 0, 3, TEX_REFLECT_WIDTH, TEX_REFLECT_HEIGHT,
+		0, GL_RGB, GL_UNSIGNED_BYTE, reflectmap);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   for (y = 0; y < TEX_REFLECT_NUMSLOT; y++)
+      updatereflectmap(y);
+
+
+}
+
+static void
+initspherepos(void)
+{
+   float alpha, beta, sa, ca, sb, cb;
+   int x, y;
+
+   for (y = 0; y < TEX_REFLECT_HEIGHT; y++) {
+      beta = M_PI - y * (M_PI / TEX_REFLECT_HEIGHT);
+
+      for (x = 0; x < TEX_REFLECT_WIDTH; x++) {
+	 alpha = -x * (2.0f * M_PI / TEX_REFLECT_WIDTH);
+
+	 sa = sin(alpha);
+	 ca = cos(alpha);
+
+	 sb = sin(beta);
+	 cb = cos(beta);
+
+	 sphere_pos[y][x][0] = SPHERE_RADIUS * sa * sb;
+	 sphere_pos[y][x][1] = SPHERE_RADIUS * ca * sb;
+	 sphere_pos[y][x][2] = SPHERE_RADIUS * cb;
+      }
+   }
+}
+
+static void
+initdlists(void)
+{
+   GLUquadricObj *obj;
+
+   obj = gluNewQuadric();
+
+   lightdlist = glGenLists(1);
+   glNewList(lightdlist, GL_COMPILE);
+   gluQuadricDrawStyle(obj, GLU_FILL);
+   gluQuadricNormals(obj, GLU_NONE);
+   gluQuadricTexture(obj, GL_TRUE);
+   gluSphere(obj, 0.25f, 6, 6);
+   glEndList();
+
+   objdlist = glGenLists(1);
+   glNewList(objdlist, GL_COMPILE);
+   gluQuadricDrawStyle(obj, GLU_FILL);
+   gluQuadricNormals(obj, GLU_NONE);
+   gluQuadricTexture(obj, GL_TRUE);
+   gluSphere(obj, SPHERE_RADIUS, 16, 16);
+   glEndList();
+}
+
+int
+main(int ac, char **av)
+{
+   fprintf(stderr,
+	   "Ray V1.0\nWritten by David Bucciarelli (tech.hmw@plus.it)\n");
+
+   /*
+      if(!SetPriorityClass(GetCurrentProcess(),REALTIME_PRIORITY_CLASS)) {
+      fprintf(stderr,"Error setting the process class.\n");
+      return 0;
+      }
+
+      if(!SetThreadPriority(GetCurrentThread(),THREAD_PRIORITY_TIME_CRITICAL)) {
+      fprintf(stderr,"Error setting the process priority.\n");
+      return 0;
+      }
+    */
+
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(WIDTH, HEIGHT);
+   glutInit(&ac, av);
+
+   glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
+
+   if (!(win = glutCreateWindow("Ray"))) {
+      fprintf(stderr, "Error, couldn't open window\n");
+      return -1;
+   }
+
+   reshape(WIDTH, HEIGHT);
+
+   glShadeModel(GL_FLAT);
+   glEnable(GL_DEPTH_TEST);
+   glDepthFunc(GL_LEQUAL);
+   glEnable(GL_CULL_FACE);
+   glEnable(GL_TEXTURE_2D);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+   glEnable(GL_FOG);
+   glFogi(GL_FOG_MODE, GL_EXP2);
+   glFogfv(GL_FOG_COLOR, fogcolor);
+
+   glFogf(GL_FOG_DENSITY, 0.01);
+#ifdef FX
+   glHint(GL_FOG_HINT, GL_NICEST);
+#endif
+
+   calcposobs();
+
+   initspherepos();
+
+   inittextures();
+   initdlists();
+
+   glClearColor(fogcolor[0], fogcolor[1], fogcolor[2], fogcolor[3]);
+
+   glutReshapeFunc(reshape);
+   glutDisplayFunc(draw);
+   glutKeyboardFunc(key);
+   glutSpecialFunc(special);
+   glutIdleFunc(draw);
+
+   glutMainLoop();
+
+   return 0;
+}
diff --git a/progs/demos/readpix.c b/progs/demos/readpix.c
new file mode 100644
index 000000000..75ba45c1e
--- /dev/null
+++ b/progs/demos/readpix.c
@@ -0,0 +1,344 @@
+
+/*
+ * glReadPixels and glCopyPixels test
+ * 
+ * Brian Paul   March 1, 2000  This file is in the public domain.
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <GL/glut.h>
+
+#include "readtex.h"
+
+#define IMAGE_FILE "../images/girl.rgb"
+
+static int ImgWidth, ImgHeight;
+static GLenum ImgFormat;
+static GLubyte *Image = NULL;
+
+static int APosX, APosY;  /* simple drawpixels */
+static int BPosX, BPosY;  /* read/draw pixels */
+static int CPosX, CPosY;  /* copypixels */
+
+static GLboolean DrawFront = GL_FALSE;
+static GLboolean ScaleAndBias = GL_FALSE;
+static GLboolean Benchmark = GL_FALSE;
+static GLubyte *TempImage = NULL;
+
+#if 0
+#define ReadFormat ImgFormat
+#define ReadType GL_UNSIGNED_BYTE
+#endif
+#if 1
+static GLenum ReadFormat = GL_RGBA;
+static GLenum ReadType = GL_UNSIGNED_BYTE;
+#endif
+#if 0
+static GLenum ReadFormat = GL_RGB;
+static GLenum ReadType = GL_UNSIGNED_BYTE;
+#endif
+#if 0
+static GLenum ReadFormat = GL_RGB;
+static GLenum ReadType = GL_UNSIGNED_SHORT_5_6_5;
+#endif
+#if 0
+static GLenum ReadFormat = GL_RGBA;
+static GLenum ReadType = GL_UNSIGNED_SHORT_1_5_5_5_REV;
+#endif
+#if 0
+static GLenum ReadFormat = GL_BGRA;
+static GLenum ReadType = GL_UNSIGNED_SHORT_5_5_5_1;
+#endif
+#if 0
+static GLenum ReadFormat = GL_BGRA;
+static GLenum ReadType = GL_UNSIGNED_SHORT_4_4_4_4_REV;
+#endif
+
+
+static void
+Reset( void )
+{
+   APosX = 5;     APosY = 20;
+   BPosX = APosX + ImgWidth + 5;   BPosY = 20;
+   CPosX = BPosX + ImgWidth + 5;   CPosY = 20;
+}
+
+
+static void
+PrintString(const char *s)
+{
+   while (*s) {
+      glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
+      s++;
+   }
+}
+
+
+static void
+SetupPixelTransfer(GLboolean invert)
+{
+   if (invert) {
+      glPixelTransferf(GL_RED_SCALE, -1.0);
+      glPixelTransferf(GL_RED_BIAS, 1.0);
+      glPixelTransferf(GL_GREEN_SCALE, -1.0);
+      glPixelTransferf(GL_GREEN_BIAS, 1.0);
+      glPixelTransferf(GL_BLUE_SCALE, -1.0);
+      glPixelTransferf(GL_BLUE_BIAS, 1.0);
+   }
+   else {
+      glPixelTransferf(GL_RED_SCALE, 1.0);
+      glPixelTransferf(GL_RED_BIAS, 0.0);
+      glPixelTransferf(GL_GREEN_SCALE, 1.0);
+      glPixelTransferf(GL_GREEN_BIAS, 0.0);
+      glPixelTransferf(GL_BLUE_SCALE, 1.0);
+      glPixelTransferf(GL_BLUE_BIAS, 0.0);
+   }
+}
+
+
+/**
+ * Exercise Pixel Pack parameters by reading the image in four pieces.
+ */
+static void
+ComplexReadPixels(GLint x, GLint y, GLsizei width, GLsizei height,
+                  GLenum format, GLenum type, GLvoid *pixels)
+{
+   const GLsizei width0 = width / 2;
+   const GLsizei width1 = width - width0;
+   const GLsizei height0 = height / 2;
+   const GLsizei height1 = height - height0;
+
+   glPixelStorei(GL_PACK_ROW_LENGTH, width);
+
+   /* lower-left quadrant */
+   glReadPixels(x, y, width0, height0, format, type, pixels);
+
+   /* lower-right quadrant */
+   glPixelStorei(GL_PACK_SKIP_PIXELS, width0);
+   glReadPixels(x + width0, y, width1, height0, format, type, pixels);
+
+   /* upper-left quadrant */
+   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
+   glPixelStorei(GL_PACK_SKIP_ROWS, height0);
+   glReadPixels(x, y + height0, width0, height1, format, type, pixels);
+
+   /* upper-right quadrant */
+   glPixelStorei(GL_PACK_SKIP_PIXELS, width0);
+   glPixelStorei(GL_PACK_SKIP_ROWS, height0);
+   glReadPixels(x + width0, y + height0, width1, height1, format, type, pixels);
+
+   /* restore defaults */
+   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
+   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
+   glPixelStorei(GL_PACK_ROW_LENGTH, ImgWidth);
+}
+
+
+
+static void
+Display( void )
+{
+   glClearColor(.3, .3, .3, 1);
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glRasterPos2i(5, ImgHeight+25);
+   PrintString("f = toggle front/back  s = toggle scale/bias  b = benchmark");
+
+   /* draw original image */
+   glRasterPos2i(APosX, 5);
+   PrintString("Original");
+   glRasterPos2i(APosX, APosY);
+   glEnable(GL_DITHER);
+   SetupPixelTransfer(GL_FALSE);
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   glDrawPixels(ImgWidth, ImgHeight, ImgFormat, GL_UNSIGNED_BYTE, Image);
+
+   /* might try alignment=4 here for testing */
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   glPixelStorei(GL_PACK_ALIGNMENT, 1);
+
+   /* do readpixels, drawpixels */
+   glRasterPos2i(BPosX, 5);
+   PrintString("Read/DrawPixels");
+   SetupPixelTransfer(ScaleAndBias);
+   if (Benchmark) {
+      GLint reads = 0;
+      GLint endTime;
+      GLint startTime = glutGet(GLUT_ELAPSED_TIME);
+      GLdouble seconds, pixelsPerSecond;
+      printf("Benchmarking...\n");
+      do {
+         glReadPixels(APosX, APosY, ImgWidth, ImgHeight,
+                      ReadFormat, ReadType, TempImage);
+         reads++;
+         endTime = glutGet(GLUT_ELAPSED_TIME);
+      } while (endTime - startTime < 4000);   /* 4 seconds */
+      seconds = (double) (endTime - startTime) / 1000.0;
+      pixelsPerSecond = reads * ImgWidth * ImgHeight / seconds;
+      printf("Result:  %d reads in %f seconds = %f pixels/sec\n",
+             reads, seconds, pixelsPerSecond);
+      Benchmark = GL_FALSE;
+   }
+   else {
+      /* clear the temporary image to white (helpful for debugging */
+      memset(TempImage, 255, ImgWidth * ImgHeight * 4);
+#if 1
+      glReadPixels(APosX, APosY, ImgWidth, ImgHeight,
+                   ReadFormat, ReadType, TempImage);
+      (void) ComplexReadPixels;
+#else
+      /* you might use this when debugging */
+      ComplexReadPixels(APosX, APosY, ImgWidth, ImgHeight,
+                        ReadFormat, ReadType, TempImage);
+#endif
+   }
+   glRasterPos2i(BPosX, BPosY);
+   glDisable(GL_DITHER);
+   SetupPixelTransfer(GL_FALSE);
+   glDrawPixels(ImgWidth, ImgHeight, ReadFormat, ReadType, TempImage);
+
+   /* do copypixels */
+   glRasterPos2i(CPosX, 5);
+   PrintString("CopyPixels");
+   glRasterPos2i(CPosX, CPosY);
+   glDisable(GL_DITHER);
+   SetupPixelTransfer(ScaleAndBias);
+   glCopyPixels(APosX, APosY, ImgWidth, ImgHeight, GL_COLOR);
+
+   if (!DrawFront)
+      glutSwapBuffers();
+   else
+      glFinish();
+}
+
+
+static void
+Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( 0.0, width, 0.0, height, -1.0, 1.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+}
+
+
+static void
+Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 'b':
+         Benchmark = GL_TRUE;
+         break;
+      case 's':
+         ScaleAndBias = !ScaleAndBias;
+         break;
+      case 'f':
+         DrawFront = !DrawFront;
+         if (DrawFront) {
+            glDrawBuffer(GL_FRONT);
+            glReadBuffer(GL_FRONT);
+         }
+         else {
+            glDrawBuffer(GL_BACK);
+            glReadBuffer(GL_BACK);
+         }
+         printf("glDrawBuffer(%s)\n", DrawFront ? "GL_FRONT" : "GL_BACK");
+         break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+Init( GLboolean ciMode )
+{
+   GLboolean have_read_format = GL_FALSE;
+
+   printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
+   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+
+   Image = LoadRGBImage( IMAGE_FILE, &ImgWidth, &ImgHeight, &ImgFormat );
+   if (!Image) {
+      printf("Couldn't read %s\n", IMAGE_FILE);
+      exit(0);
+   }
+
+   if (ciMode) {
+      /* Convert RGB image to grayscale */
+      GLubyte *indexImage = (GLubyte *) malloc( ImgWidth * ImgHeight );
+      GLint i;
+      for (i=0; i<ImgWidth*ImgHeight; i++) {
+         int gray = Image[i*3] + Image[i*3+1] + Image[i*3+2];
+         indexImage[i] = gray / 3;
+      }
+      free(Image);
+      Image = indexImage;
+      ImgFormat = GL_COLOR_INDEX;
+
+      for (i=0;i<255;i++) {
+         float g = i / 255.0;
+         glutSetColor(i, g, g, g);
+      }
+   }
+
+#ifdef GL_OES_read_format
+   if ( glutExtensionSupported( "GL_OES_read_format" ) ) {
+      glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_TYPE_OES,   (GLint *) &ReadType);
+      glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_FORMAT_OES, (GLint *) &ReadFormat);
+
+      have_read_format = GL_TRUE;
+   }
+#endif
+
+   printf( "GL_OES_read_format %ssupported.  "
+	   "Using type / format = 0x%04x / 0x%04x\n",
+	   (have_read_format) ? "" : "not ",
+	   ReadType, ReadFormat );
+
+   printf("Loaded %d by %d image\n", ImgWidth, ImgHeight );
+
+   glPixelStorei(GL_UNPACK_ROW_LENGTH, ImgWidth);
+   glPixelStorei(GL_PACK_ROW_LENGTH, ImgWidth);
+
+   Reset();
+
+   /* allocate an extra 1KB in case we're tinkering with pack alignment */
+   TempImage = (GLubyte *) malloc(ImgWidth * ImgHeight * 4 * sizeof(GLubyte)
+                                  + 1000);
+   assert(TempImage);
+}
+
+
+int
+main( int argc, char *argv[] )
+{
+   GLboolean ciMode = GL_FALSE;
+   if (argc > 1 && strcmp(argv[1], "-ci")==0) {
+      ciMode = GL_TRUE;
+   }
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 750, 250 );
+   if (ciMode)
+      glutInitDisplayMode( GLUT_INDEX | GLUT_DOUBLE );
+   else
+      glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+   glutCreateWindow(argv[0]);
+   Init(ciMode);
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutDisplayFunc( Display );
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/reflect.c b/progs/demos/reflect.c
new file mode 100644
index 000000000..bf6d91aaa
--- /dev/null
+++ b/progs/demos/reflect.c
@@ -0,0 +1,404 @@
+
+/*
+ * Demo of a reflective, texture-mapped surface with OpenGL.
+ * Brian Paul   August 14, 1995   This file is in the public domain.
+ *
+ * Hardware texture mapping is highly recommended!
+ *
+ * The basic steps are:
+ *    1. Render the reflective object (a polygon) from the normal viewpoint,
+ *       setting the stencil planes = 1.
+ *    2. Render the scene from a special viewpoint:  the viewpoint which
+ *       is on the opposite side of the reflective plane.  Only draw where
+ *       stencil = 1.  This draws the objects in the reflective surface.
+ *    3. Render the scene from the original viewpoint.  This draws the
+ *       objects in the normal fashion.  Use blending when drawing
+ *       the reflective, textured surface.
+ *
+ * This is a very crude demo.  It could be much better.
+ */
+ 
+/*
+ * Authors:
+ *   Brian Paul
+ *   Dirk Reiners (reiners@igd.fhg.de) made some modifications to this code.
+ *   Mark Kilgard (April 1997)
+ *   Brian Paul (April 2000 - added keyboard d/s options)
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "GL/glut.h"
+#include "showbuffer.h"
+#include "readtex.h"
+
+
+#define DEG2RAD (3.14159/180.0)
+
+#define TABLE_TEXTURE "../images/tile.rgb"
+
+static GLint ImgWidth, ImgHeight;
+static GLenum ImgFormat;
+static GLubyte *Image = NULL;
+
+#define MAX_OBJECTS 2
+static GLint table_list;
+static GLint objects_list[MAX_OBJECTS];
+
+static GLfloat xrot, yrot;
+static GLfloat spin;
+
+static GLint Width = 400, Height = 300;
+static GLenum ShowBuffer = GL_NONE;
+static GLboolean Anim = GL_TRUE;
+
+/* performance info */
+static GLint T0 = 0;
+static GLint Frames = 0;
+
+
+static void make_table( void )
+{
+   static GLfloat table_mat[] = { 1.0, 1.0, 1.0, 0.6 };
+   static GLfloat gray[] = { 0.4, 0.4, 0.4, 1.0 };
+
+   table_list = glGenLists(1);
+   glNewList( table_list, GL_COMPILE );
+
+   /* load table's texture */
+   glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, table_mat );
+/*   glMaterialfv( GL_FRONT, GL_EMISSION, gray );*/
+   glMaterialfv( GL_FRONT, GL_DIFFUSE, table_mat );
+   glMaterialfv( GL_FRONT, GL_AMBIENT, gray );
+   
+   /* draw textured square for the table */
+   glPushMatrix();
+   glScalef( 4.0, 4.0, 4.0 );
+   glBegin( GL_POLYGON );
+   glNormal3f( 0.0, 1.0, 0.0 );
+   glTexCoord2f( 0.0, 0.0 );   glVertex3f( -1.0, 0.0,  1.0 );
+   glTexCoord2f( 1.0, 0.0 );   glVertex3f(  1.0, 0.0,  1.0 );
+   glTexCoord2f( 1.0, 1.0 );   glVertex3f(  1.0, 0.0, -1.0 );
+   glTexCoord2f( 0.0, 1.0 );   glVertex3f( -1.0, 0.0, -1.0 );
+   glEnd();
+   glPopMatrix();
+
+   glDisable( GL_TEXTURE_2D );
+
+   glEndList();
+}
+
+
+static void make_objects( void )
+{
+   GLUquadricObj *q;
+
+   static GLfloat cyan[] = { 0.0, 1.0, 1.0, 1.0 };
+   static GLfloat green[] = { 0.2, 1.0, 0.2, 1.0 };
+   static GLfloat black[] = { 0.0, 0.0, 0.0, 0.0 };
+
+   q = gluNewQuadric();
+   gluQuadricDrawStyle( q, GLU_FILL );
+   gluQuadricNormals( q, GLU_SMOOTH );
+
+   objects_list[0] = glGenLists(1);
+   glNewList( objects_list[0], GL_COMPILE );
+   glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, cyan );
+   glMaterialfv( GL_FRONT, GL_EMISSION, black );
+   gluCylinder( q, 0.5, 0.5,  1.0, 15, 1 );
+   glEndList();
+
+   objects_list[1] = glGenLists(1);
+   glNewList( objects_list[1], GL_COMPILE );
+   glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green );
+   glMaterialfv( GL_FRONT, GL_EMISSION, black );
+   gluCylinder( q, 1.5, 0.0,  2.5, 15, 1 );
+   glEndList();
+}
+
+
+static void init( void )
+{
+   make_table();
+   make_objects();
+
+   Image = LoadRGBImage( TABLE_TEXTURE, &ImgWidth, &ImgHeight, &ImgFormat );
+   if (!Image) {
+      printf("Couldn't read %s\n", TABLE_TEXTURE);
+      exit(0);
+   }
+
+   gluBuild2DMipmaps(GL_TEXTURE_2D, 3, ImgWidth, ImgHeight,
+                     ImgFormat, GL_UNSIGNED_BYTE, Image);
+
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
+
+   xrot = 30.0;
+   yrot = 50.0;
+   spin = 0.0;
+
+   glShadeModel( GL_FLAT );
+   
+   glEnable( GL_LIGHT0 );
+   glEnable( GL_LIGHTING );
+
+   glClearColor( 0.5, 0.5, 0.9, 0.0 );
+
+   glEnable( GL_NORMALIZE );
+}
+
+
+
+static void reshape(int w, int h)
+{
+   GLfloat yAspect = 2.5;
+   GLfloat xAspect = yAspect * (float) w / (float) h;
+   Width = w;
+   Height = h;
+   glViewport(0, 0, w, h);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum( -xAspect, xAspect, -yAspect, yAspect, 10.0, 30.0 );
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+}
+
+
+
+static void draw_objects( GLfloat eyex, GLfloat eyey, GLfloat eyez )
+{
+   (void) eyex;
+   (void) eyey;
+   (void) eyez;
+#ifndef USE_ZBUFFER
+   if (eyex<0.5) {
+#endif
+	   glPushMatrix();
+	   glTranslatef( 1.0, 1.5, 0.0 );
+	   glRotatef( spin, 1.0, 0.5, 0.0 );
+	   glRotatef( 0.5*spin, 0.0, 0.5, 1.0 );
+	   glCallList( objects_list[0] );
+	   glPopMatrix();
+	
+	   glPushMatrix();
+	   glTranslatef( -1.0, 0.85+3.0*fabs( cos(0.01*spin) ), 0.0 );
+	   glRotatef( 0.5*spin, 0.0, 0.5, 1.0 );
+	   glRotatef( spin, 1.0, 0.5, 0.0 );
+	   glScalef( 0.5, 0.5, 0.5 );
+	   glCallList( objects_list[1] );
+	   glPopMatrix();
+#ifndef USE_ZBUFFER
+   }
+   else {	
+	   glPushMatrix();
+	   glTranslatef( -1.0, 0.85+3.0*fabs( cos(0.01*spin) ), 0.0 );
+	   glRotatef( 0.5*spin, 0.0, 0.5, 1.0 );
+	   glRotatef( spin, 1.0, 0.5, 0.0 );
+	   glScalef( 0.5, 0.5, 0.5 );
+	   glCallList( objects_list[1] );
+	   glPopMatrix();
+
+	   glPushMatrix();
+	   glTranslatef( 1.0, 1.5, 0.0 );
+	   glRotatef( spin, 1.0, 0.5, 0.0 );
+	   glRotatef( 0.5*spin, 0.0, 0.5, 1.0 );
+	   glCallList( objects_list[0] );
+	   glPopMatrix();
+   }
+#endif
+}
+
+
+
+static void draw_table( void )
+{
+   glCallList( table_list );
+}
+
+
+
+static void draw_scene( void )
+{
+   static GLfloat light_pos[] = { 0.0, 20.0, 0.0, 1.0 };
+   GLfloat dist = 20.0;
+   GLfloat eyex, eyey, eyez;
+
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+
+
+   eyex = dist * cos(yrot*DEG2RAD) * cos(xrot*DEG2RAD);
+   eyez = dist * sin(yrot*DEG2RAD) * cos(xrot*DEG2RAD);
+   eyey = dist * sin(xrot*DEG2RAD);
+
+   /* view from top */
+   glPushMatrix();
+   gluLookAt( eyex, eyey, eyez, 0.0, 0.0, 0.0,  0.0, 1.0, 0.0 );
+
+   glLightfv( GL_LIGHT0, GL_POSITION, light_pos );
+ 
+   /* draw table into stencil planes */
+   glDisable( GL_DEPTH_TEST );
+   glEnable( GL_STENCIL_TEST );
+   glStencilFunc( GL_ALWAYS, 1, 0xffffffff );
+   glStencilOp( GL_REPLACE, GL_REPLACE, GL_REPLACE );
+   glColorMask( GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE );
+   draw_table();
+   glColorMask( GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE );
+
+   glEnable( GL_DEPTH_TEST );
+
+   /* render view from below (reflected viewport) */
+   /* only draw where stencil==1 */
+   if (eyey>0.0) {
+      glPushMatrix();
+ 
+      glStencilFunc( GL_EQUAL, 1, 0xffffffff );  /* draw if ==1 */
+      glStencilOp( GL_KEEP, GL_KEEP, GL_KEEP );
+      glScalef( 1.0, -1.0, 1.0 );
+
+      /* Reposition light in reflected space. */
+      glLightfv(GL_LIGHT0, GL_POSITION, light_pos);
+
+      draw_objects(eyex, eyey, eyez);
+      glPopMatrix();
+
+      /* Restore light's original unreflected position. */
+      glLightfv(GL_LIGHT0, GL_POSITION, light_pos);
+   }
+
+   glDisable( GL_STENCIL_TEST );
+
+   glEnable( GL_BLEND );
+   glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
+
+   glEnable( GL_TEXTURE_2D );
+   draw_table();
+   glDisable( GL_TEXTURE_2D );
+   glDisable( GL_BLEND );
+
+   /* view from top */
+   glPushMatrix();
+
+   draw_objects(eyex, eyey, eyez);
+
+   glPopMatrix();
+
+   glPopMatrix();
+
+   if (ShowBuffer == GL_DEPTH) {
+      ShowDepthBuffer(Width, Height, 1.0, 0.0);
+   }
+   else if (ShowBuffer == GL_STENCIL) {
+      ShowStencilBuffer(Width, Height, 255.0, 0.0);
+   }
+   else if (ShowBuffer == GL_ALPHA) {
+      ShowAlphaBuffer(Width, Height);
+   }
+
+   glutSwapBuffers();
+
+   {
+      GLint t = glutGet(GLUT_ELAPSED_TIME);
+      Frames++;
+      if (t - T0 >= 5000) {
+         GLfloat seconds = (t - T0) / 1000.0;
+         GLfloat fps = Frames / seconds;
+         printf("%d frames in %g seconds = %g FPS\n", Frames, seconds, fps);
+         T0 = t;
+         Frames = 0;
+      }
+   }
+}
+
+
+static void idle( void )
+{
+   static double t0 = -1.;
+   double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+   spin += 60.0 * dt;
+   yrot += 90.0 * dt;
+   glutPostRedisplay();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   if (key == 'd') {
+      ShowBuffer = GL_DEPTH;
+   }
+   else if (key == 's') {
+      ShowBuffer = GL_STENCIL;
+   }
+   else if (key == 'a') {
+      ShowBuffer = GL_ALPHA;
+   }
+   else if (key == ' ') {
+      Anim = !Anim;
+      if (Anim)
+         glutIdleFunc(idle);
+      else
+         glutIdleFunc(NULL);
+   }
+   else if (key==27) {
+      exit(0);
+   }
+   else {
+      ShowBuffer = GL_NONE;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         xrot += 3.0;
+         if ( xrot > 85 )
+            xrot = 85;
+         break;
+      case GLUT_KEY_DOWN:
+         xrot -= 3.0;
+         if ( xrot < 5 )
+            xrot = 5;
+         break;
+      case GLUT_KEY_LEFT:
+         yrot += 3.0;
+         break;
+      case GLUT_KEY_RIGHT:
+         yrot -= 3.0;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit(&argc, argv);
+   glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH | GLUT_STENCIL | GLUT_ALPHA);
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( Width, Height );
+   glutCreateWindow(argv[0]);
+   glutReshapeFunc(reshape);
+   glutDisplayFunc(draw_scene);
+   glutKeyboardFunc(Key);
+   glutSpecialFunc(SpecialKey);
+   glutIdleFunc(idle);
+   init();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/renormal.c b/progs/demos/renormal.c
new file mode 100644
index 000000000..9e5da9548
--- /dev/null
+++ b/progs/demos/renormal.c
@@ -0,0 +1,139 @@
+
+/*
+ * Test GL_EXT_rescale_normal extension
+ * Brian Paul  January 1998   This program is in the public domain.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+
+
+static GLfloat Phi = 0.0;
+
+
+static void Idle( void )
+{
+   static double t0 = -1.;
+   double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+   Phi += 3.0 * dt;
+   glutPostRedisplay();
+}
+
+
+static void Display( void )
+{
+   GLfloat scale = 0.6 + 0.5 * sin(Phi);
+   glClear( GL_COLOR_BUFFER_BIT );
+   glPushMatrix();
+   glScalef(scale, scale, scale);
+   glutSolidSphere(2.0, 20, 20);
+   glPopMatrix();
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -15.0 );
+}
+
+
+
+static void Init( void )
+{
+   static GLfloat mat[4] = { 0.8, 0.8, 0.0, 1.0 };
+   static GLfloat pos[4] = { -1.0, 1.0, 1.0, 0.0 };
+
+   /* setup lighting, etc */
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, mat);
+   glLightfv(GL_LIGHT0, GL_POSITION, pos);
+
+   glEnable(GL_CULL_FACE);
+
+   glDisable(GL_RESCALE_NORMAL_EXT);
+   glDisable(GL_NORMALIZE);
+}
+
+
+#define UNSCALED  1
+#define NORMALIZE 2
+#define RESCALE   3
+#define QUIT      4
+
+
+static void ModeMenu(int entry)
+{
+   if (entry==UNSCALED) {
+      glDisable(GL_RESCALE_NORMAL_EXT);
+      glDisable(GL_NORMALIZE);
+   }
+   else if (entry==NORMALIZE) {
+      glEnable(GL_NORMALIZE);
+      glDisable(GL_RESCALE_NORMAL_EXT);
+   }
+   else if (entry==RESCALE) {
+      glDisable(GL_NORMALIZE);
+      glEnable(GL_RESCALE_NORMAL_EXT);
+   }
+   else if (entry==QUIT) {
+      exit(0);
+   }
+   glutPostRedisplay();
+}
+
+static void
+key(unsigned char k, int x, int y)
+{
+  (void) x;
+  (void) y;
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize( 400, 400 );
+
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+
+   glutCreateWindow(argv[0]);
+
+   Init();
+
+   glutIdleFunc( Idle );
+   glutReshapeFunc( Reshape );
+   glutDisplayFunc( Display );
+   glutKeyboardFunc(key);
+
+   glutCreateMenu(ModeMenu);
+   glutAddMenuEntry("Unscaled", UNSCALED);
+   glutAddMenuEntry("Normalize", NORMALIZE);
+   glutAddMenuEntry("Rescale EXT", RESCALE);
+   glutAddMenuEntry("Quit", QUIT);
+   glutAttachMenu(GLUT_RIGHT_BUTTON);
+
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/shadowtex.c b/progs/demos/shadowtex.c
new file mode 100644
index 000000000..e918751a7
--- /dev/null
+++ b/progs/demos/shadowtex.c
@@ -0,0 +1,600 @@
+/*
+ * Shadow demo using the GL_ARB_depth_texture, GL_ARB_shadow and
+ * GL_ARB_shadow_ambient extensions (or the old SGIX extensions).
+ *
+ * Brian Paul
+ * 19 Feb 2001
+ *
+ * Added GL_EXT_shadow_funcs support on 23 March 2002
+ *
+ * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+#include "showbuffer.h"
+
+#if 0 /* change to 1 if you want to use the old SGIX extensions */
+#undef GL_ARB_depth_texture
+#undef GL_ARB_shadow
+#undef GL_ARB_shadow_ambient
+#endif
+
+
+#define DEG_TO_RAD (3.14159 / 180.0)
+
+static GLint WindowWidth = 450, WindowHeight = 300;
+static GLfloat Xrot = 15, Yrot = 0, Zrot = 0;
+
+static GLfloat Red[4] = {1, 0, 0, 1};
+static GLfloat Green[4] = {0, 1, 0, 1};
+static GLfloat Blue[4] = {0, 0, 1, 1};
+static GLfloat Yellow[4] = {1, 1, 0, 1};
+
+static GLfloat LightDist = 10;
+static GLfloat LightLatitude = 45.0;
+static GLfloat LightLongitude = 45.0;
+static GLfloat LightPos[4];
+static GLfloat SpotDir[3];
+static GLfloat SpotAngle = 40.0 * DEG_TO_RAD;
+static GLfloat ShadowNear = 4.0, ShadowFar = 24.0;
+static GLint ShadowTexWidth = 256, ShadowTexHeight = 256;
+
+static GLboolean LinearFilter = GL_FALSE;
+
+static GLfloat Bias = -0.06;
+
+static GLboolean Anim = GL_TRUE;
+
+static GLboolean HaveEXTshadowFuncs = GL_FALSE;
+static GLint Operator = 0;
+static const GLenum OperatorFunc[8] = {
+   GL_LEQUAL, GL_LESS, GL_GEQUAL, GL_GREATER,
+   GL_EQUAL, GL_NOTEQUAL, GL_ALWAYS, GL_NEVER };
+static const char *OperatorName[8] = {
+   "GL_LEQUAL", "GL_LESS", "GL_GEQUAL", "GL_GREATER",
+   "GL_EQUAL", "GL_NOTEQUAL", "GL_ALWAYS", "GL_NEVER" };
+
+
+static GLuint DisplayMode;
+#define SHOW_NORMAL         0
+#define SHOW_DEPTH_IMAGE    1
+#define SHOW_DEPTH_MAPPING  2
+#define SHOW_DISTANCE       3
+
+
+
+static void
+DrawScene(void)
+{
+   GLfloat k = 6;
+   /* sphere */
+   glPushMatrix();
+   glTranslatef(1.6, 2.2, 2.7);
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, Green);
+   glColor4fv(Green);
+   glutSolidSphere(1.5, 15, 15);
+   glPopMatrix();
+   /* dodecahedron */
+   glPushMatrix();
+   glTranslatef(-2.0, 1.2, 2.1);
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, Red);
+   glColor4fv(Red);
+   glutSolidDodecahedron();
+   glPopMatrix();
+   /* icosahedron */
+   glPushMatrix();
+   glTranslatef(-0.6, 1.3, -0.5);
+   glScalef(1.5, 1.5, 1.5);
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, Yellow);
+   glColor4fv(Red);
+   glutSolidIcosahedron();
+   glPopMatrix();
+   /* a plane */
+   glPushMatrix();
+   glTranslatef(0, -1.1, 0);
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, Blue);
+   glColor4fv(Blue);
+   glNormal3f(0, 1, 0);
+   glBegin(GL_POLYGON);
+   glVertex3f(-k, 0, -k);
+   glVertex3f( k, 0, -k);
+   glVertex3f( k, 0,  k);
+   glVertex3f(-k, 0,  k);
+   glEnd();
+   glPopMatrix();
+}
+
+
+/*
+ * Load the GL_TEXTURE matrix with the projection from the light
+ * source's point of view.
+ */
+static void
+MakeShadowMatrix(const GLfloat lightPos[4], const GLfloat spotDir[3],
+                 GLfloat spotAngle, GLfloat shadowNear, GLfloat shadowFar)
+{
+   GLfloat d;
+   
+   glMatrixMode(GL_TEXTURE);
+   glLoadIdentity();
+   glTranslatef(0.5, 0.5, 0.5 + Bias);
+   glScalef(0.5, 0.5, 0.5);
+   d = shadowNear * tan(spotAngle);
+   glFrustum(-d, d, -d, d, shadowNear, shadowFar);
+   gluLookAt(lightPos[0], lightPos[1], lightPos[2],
+             lightPos[0] + spotDir[0],
+             lightPos[1] + spotDir[1],
+             lightPos[2] + spotDir[2],
+             0, 1, 0);
+   glMatrixMode(GL_MODELVIEW);
+}
+
+
+static void
+EnableIdentityTexgen(void)
+{
+   /* texgen so that texcoord = vertex coord */
+   static GLfloat sPlane[4] = { 1, 0, 0, 0 };
+   static GLfloat tPlane[4] = { 0, 1, 0, 0 };
+   static GLfloat rPlane[4] = { 0, 0, 1, 0 };
+   static GLfloat qPlane[4] = { 0, 0, 0, 1 };
+
+   glTexGenfv(GL_S, GL_EYE_PLANE, sPlane);
+   glTexGenfv(GL_T, GL_EYE_PLANE, tPlane);
+   glTexGenfv(GL_R, GL_EYE_PLANE, rPlane);
+   glTexGenfv(GL_Q, GL_EYE_PLANE, qPlane);
+   glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
+   glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
+   glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
+   glTexGeni(GL_Q, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
+
+   glEnable(GL_TEXTURE_GEN_S);
+   glEnable(GL_TEXTURE_GEN_T);
+   glEnable(GL_TEXTURE_GEN_R);
+   glEnable(GL_TEXTURE_GEN_Q);
+}
+
+
+/*
+ * Setup 1-D texgen so that the distance from the light source, between
+ * the near and far planes maps to s=0 and s=1.  When we draw the scene,
+ * the grayness will indicate the fragment's distance from the light
+ * source.
+ */
+static void
+EnableDistanceTexgen(const GLfloat lightPos[4], const GLfloat lightDir[3],
+                     GLfloat lightNear, GLfloat lightFar)
+{
+   GLfloat m, d;
+   GLfloat sPlane[4];
+   GLfloat nearPoint[3];
+
+   m = sqrt(lightDir[0] * lightDir[0] +
+            lightDir[1] * lightDir[1] +
+            lightDir[2] * lightDir[2]);
+
+   d = lightFar - lightNear;
+
+   /* nearPoint = point on light direction vector which intersects the
+    * near plane of the light frustum.
+    */
+   nearPoint[0] = LightPos[0] + lightDir[0] / m * lightNear;
+   nearPoint[1] = LightPos[1] + lightDir[1] / m * lightNear;
+   nearPoint[2] = LightPos[2] + lightDir[2] / m * lightNear;
+
+   sPlane[0] = lightDir[0] / d / m;
+   sPlane[1] = lightDir[1] / d / m;
+   sPlane[2] = lightDir[2] / d / m;
+   sPlane[3] = -(sPlane[0] * nearPoint[0]
+               + sPlane[1] * nearPoint[1]
+               + sPlane[2] * nearPoint[2]);
+
+   glTexGenfv(GL_S, GL_EYE_PLANE, sPlane);
+   glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
+   glEnable(GL_TEXTURE_GEN_S);
+}
+
+
+static void
+DisableTexgen(void)
+{
+   glDisable(GL_TEXTURE_GEN_S);
+   glDisable(GL_TEXTURE_GEN_T);
+   glDisable(GL_TEXTURE_GEN_R);
+   glDisable(GL_TEXTURE_GEN_Q);
+}
+
+
+static void
+ComputeLightPos(GLfloat dist, GLfloat latitude, GLfloat longitude,
+                GLfloat pos[4], GLfloat dir[3])
+{
+
+   pos[0] = dist * sin(longitude * DEG_TO_RAD);
+   pos[1] = dist * sin(latitude * DEG_TO_RAD);
+   pos[2] = dist * cos(latitude * DEG_TO_RAD) * cos(longitude * DEG_TO_RAD);
+   pos[3] = 1;
+   dir[0] = -pos[0];
+   dir[1] = -pos[1];
+   dir[2] = -pos[2];
+}
+
+
+static void
+Display(void)
+{
+   GLfloat ar = (GLfloat) WindowWidth / (GLfloat) WindowHeight;
+   GLfloat d;
+   GLenum error;
+
+   ComputeLightPos(LightDist, LightLatitude, LightLongitude,
+                   LightPos, SpotDir);
+   /*
+    * Step 1: render scene from point of view of the light source
+    */
+   /* compute frustum to enclose spot light cone */
+   d = ShadowNear * tan(SpotAngle);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum(-d, d, -d, d, ShadowNear, ShadowFar);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   gluLookAt(LightPos[0], LightPos[1], LightPos[2], /* from */
+             0, 0, 0, /* target */
+             0, 1, 0); /* up */
+
+   glViewport(0, 0, ShadowTexWidth, ShadowTexHeight);
+   glClear(GL_DEPTH_BUFFER_BIT);
+   DrawScene();
+
+   /*
+    * Step 2: copy depth buffer into texture map
+    */
+   if (DisplayMode == SHOW_DEPTH_MAPPING) {
+      /* load depth image as gray-scale luminance texture */
+      GLfloat *depth = (GLfloat *) malloc(ShadowTexWidth * ShadowTexHeight
+                                          * sizeof(GLfloat));
+      if (depth) {
+         glReadPixels(0, 0, ShadowTexWidth, ShadowTexHeight,
+                      GL_DEPTH_COMPONENT, GL_FLOAT, depth);
+         glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE,
+                      ShadowTexWidth, ShadowTexHeight, 0,
+                      GL_LUMINANCE, GL_FLOAT, depth);
+         free(depth);
+      }
+   }
+   else {
+      /* The normal shadow case */
+      glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT,
+                       0, 0, ShadowTexWidth, ShadowTexHeight, 0);
+   }
+
+   /*
+    * Step 3: render scene from point of view of the camera
+    */
+   glViewport(0, 0, WindowWidth, WindowHeight);
+   if (DisplayMode == SHOW_DEPTH_IMAGE) {
+      ShowDepthBuffer(WindowWidth, WindowHeight, 0, 1);
+   }
+   else {
+      glMatrixMode(GL_PROJECTION);
+      glLoadIdentity();
+      glFrustum(-ar, ar, -1.0, 1.0, 4.0, 50.0);
+      glMatrixMode(GL_MODELVIEW);
+      glLoadIdentity();
+      glTranslatef(0.0, 0.0, -22.0);
+      glRotatef(Xrot, 1, 0, 0);
+      glRotatef(Yrot, 0, 1, 0);
+      glRotatef(Zrot, 0, 0, 1);
+      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+      glLightfv(GL_LIGHT0, GL_POSITION, LightPos);
+      if (LinearFilter) {
+         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+      }
+      else {
+         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+      }
+      if (DisplayMode == SHOW_DEPTH_MAPPING) {
+#if defined(GL_ARB_shadow)
+         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB, GL_NONE);
+#elif defined(GL_SGIX_shadow)
+         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_SGIX, GL_FALSE);
+#endif
+         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+         glEnable(GL_TEXTURE_2D);
+         MakeShadowMatrix(LightPos, SpotDir, SpotAngle, ShadowNear, ShadowFar);
+         EnableIdentityTexgen();
+      }
+      else if (DisplayMode == SHOW_DISTANCE) {
+         glMatrixMode(GL_TEXTURE);
+         glLoadIdentity();
+         glMatrixMode(GL_MODELVIEW);
+         EnableDistanceTexgen(LightPos, SpotDir, ShadowNear+Bias, ShadowFar);
+         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+         glEnable(GL_TEXTURE_1D);
+      }
+      else {
+         assert(DisplayMode == SHOW_NORMAL);
+#if defined(GL_ARB_shadow)
+         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB,
+                         GL_COMPARE_R_TO_TEXTURE_ARB);
+#elif defined(GL_SGIX_shadow)
+         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_SGIX, GL_TRUE);
+#endif
+         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+         glEnable(GL_TEXTURE_2D);
+         MakeShadowMatrix(LightPos, SpotDir, SpotAngle, ShadowNear, ShadowFar);
+         EnableIdentityTexgen();
+      }
+      DrawScene();
+      DisableTexgen();
+      glDisable(GL_TEXTURE_1D);
+      glDisable(GL_TEXTURE_2D);
+   }
+
+   glutSwapBuffers();
+
+   error = glGetError();
+   if (error) {
+      printf("GL Error: %s\n", (char *) gluErrorString(error));
+   }
+}
+
+
+static void
+Reshape(int width, int height)
+{
+   WindowWidth = width;
+   WindowHeight = height;
+   if (width >= 512 && height >= 512) {
+      ShadowTexWidth = ShadowTexHeight = 512;
+   }
+   else if (width >= 256 && height >= 256) {
+      ShadowTexWidth = ShadowTexHeight = 256;
+   }
+   else {
+      ShadowTexWidth = ShadowTexHeight = 128;
+   }
+   printf("Using %d x %d depth texture\n", ShadowTexWidth, ShadowTexHeight);
+}
+
+
+static void
+Idle(void)
+{
+   static double t0 = -1.;
+   double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+   Yrot += 75.0 * dt;
+   /*LightLongitude -= 5.0;*/
+   glutPostRedisplay();
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   const GLfloat step = 3.0;
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 'a':
+         Anim = !Anim;
+         if (Anim)
+            glutIdleFunc(Idle);
+         else
+            glutIdleFunc(NULL);
+         break;
+      case 'b':
+         Bias -= 0.01;
+         printf("Bias %g\n", Bias);
+         break;
+      case 'B':
+         Bias += 0.01;
+         printf("Bias %g\n", Bias);
+         break;
+      case 'd':
+         DisplayMode = SHOW_DISTANCE;
+         break;
+      case 'f':
+         LinearFilter = !LinearFilter;
+         printf("%s filtering\n", LinearFilter ? "Bilinear" : "Nearest");
+         break;
+      case 'i':
+         DisplayMode = SHOW_DEPTH_IMAGE;
+         break;
+      case 'm':
+         DisplayMode = SHOW_DEPTH_MAPPING;
+         break;
+      case 'n':
+      case ' ':
+         DisplayMode = SHOW_NORMAL;
+         break;
+      case 'o':
+         if (HaveEXTshadowFuncs) {
+            Operator++;
+            if (Operator >= 8)
+               Operator = 0;
+            printf("Operator: %s\n", OperatorName[Operator]);
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC_ARB,
+                            OperatorFunc[Operator]);
+         }
+         break;
+      case 'z':
+         Zrot -= step;
+         break;
+      case 'Z':
+         Zrot += step;
+         break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+SpecialKey(int key, int x, int y)
+{
+   const GLfloat step = 3.0;
+   const int mod = glutGetModifiers();
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         if (mod)
+            LightLatitude += step;
+         else
+            Xrot += step;
+         break;
+      case GLUT_KEY_DOWN:
+         if (mod)
+            LightLatitude -= step;
+         else
+            Xrot -= step;
+         break;
+      case GLUT_KEY_LEFT:
+         if (mod)
+            LightLongitude += step;
+         else
+            Yrot += step;
+         break;
+      case GLUT_KEY_RIGHT:
+         if (mod)
+            LightLongitude -= step;
+         else
+            Yrot -= step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+Init(void)
+{
+#if defined(GL_ARB_depth_texture) && defined(GL_ARB_shadow)
+   if (!glutExtensionSupported("GL_ARB_depth_texture") ||
+       !glutExtensionSupported("GL_ARB_shadow")) {
+      printf("Sorry, this demo requires the GL_ARB_depth_texture and GL_ARB_shadow extensions\n");
+      exit(1);
+   }
+   printf("Using GL_ARB_depth_texture and GL_ARB_shadow\n");
+#elif defined(GL_SGIX_depth_texture) && defined(GL_SGIX_shadow)
+   if (!glutExtensionSupported("GL_SGIX_depth_texture") ||
+       !glutExtensionSupported("GL_SGIX_shadow")) {
+      printf("Sorry, this demo requires the GL_SGIX_depth_texture and GL_SGIX_shadow extensions\n");
+      exit(1);
+   }
+   printf("Using GL_SGIX_depth_texture and GL_SGIX_shadow\n");
+#endif
+   HaveEXTshadowFuncs = glutExtensionSupported("GL_EXT_shadow_funcs");
+
+   glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP);
+   glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_T, GL_CLAMP);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
+#if defined(GL_ARB_shadow)
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB,
+                   GL_COMPARE_R_TO_TEXTURE_ARB);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);
+#elif defined(GL_SGIX_shadow)
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_OPERATOR_SGIX,
+                   GL_TEXTURE_LEQUAL_R_SGIX);
+#endif
+
+#if defined(GL_ARB_shadow_ambient)
+   if (glutExtensionSupported("GL_ARB_shadow_ambient")) {
+      glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FAIL_VALUE_ARB, 0.3);
+      printf("and GL_ARB_shadow_ambient\n");
+   }
+#elif defined(GL_SGIX_shadow_ambient)
+   if (glutExtensionSupported("GL_SGIX_shadow_ambient")) {
+      glTexParameterf(GL_TEXTURE_2D, GL_SHADOW_AMBIENT_SGIX, 0.3);
+      printf("and GL_SGIX_shadow_ambient\n");
+   }
+#endif
+
+   /* setup 1-D grayscale texture image for SHOW_DISTANCE mode */
+   {
+      GLuint i;
+      GLubyte image[256];
+      for (i = 0; i < 256; i++)
+         image[i] = i;
+      glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE,
+                   256, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, image);
+   }
+
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+}
+
+
+static void
+PrintHelp(void)
+{
+   printf("Keys:\n");
+   printf("  a = toggle animation\n");
+   printf("  i = show depth texture image\n");
+   printf("  m = show depth texture mapping\n");
+   printf("  d = show fragment distance from light source\n");
+   printf("  n = show normal, shadowed image\n");
+   printf("  f = toggle nearest/bilinear texture filtering\n");
+   printf("  b/B = decrease/increase shadow map Z bias\n");
+   printf("  cursor keys = rotate scene\n");
+   printf("  <shift> + cursor keys = rotate light source\n");
+   if (HaveEXTshadowFuncs)
+      printf("  o = cycle through comparison modes\n");
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(WindowWidth, WindowHeight);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+   glutCreateWindow(argv[0]);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutSpecialFunc(SpecialKey);
+   glutDisplayFunc(Display);
+   if (Anim)
+      glutIdleFunc(Idle);
+   Init();
+   PrintHelp();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/spectex.c b/progs/demos/spectex.c
new file mode 100644
index 000000000..6ab119157
--- /dev/null
+++ b/progs/demos/spectex.c
@@ -0,0 +1,272 @@
+
+/*
+ * GLUT demonstration of texturing with specular highlights.
+ *
+ * When drawing a lit, textured surface one usually wants the specular
+ * highlight to override the texture colors.  However, OpenGL applies
+ * texturing after lighting so the specular highlight is modulated by
+ * the texture.
+ *
+ * The solution here shown here is a two-pass algorithm:
+ *  1. Draw the textured surface without specular lighting.
+ *  2. Enable blending to add the next pass:
+ *  3. Redraw the surface with a matte white material and only the
+ *     specular components of light sources enabled.
+ *
+ * Brian Paul  February 1997
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+
+
+static GLUquadricObj *Quadric;
+static GLuint Sphere;
+static GLfloat LightPos[4] = {10.0, 10.0, 10.0, 1.0};
+static GLfloat Delta = 20.0;
+static GLint Mode = 4;
+
+/*static GLfloat Blue[4] = {0.0, 0.0, 1.0, 1.0};*/
+/*static GLfloat Gray[4] = {0.5, 0.5, 0.5, 1.0};*/
+static GLfloat Black[4] = {0.0, 0.0, 0.0, 1.0};
+static GLfloat White[4] = {1.0, 1.0, 1.0, 1.0};
+
+static GLboolean smooth = 1;
+
+static void
+Idle(void)
+{
+   static double t0 = -1.;
+   double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+   LightPos[0] += Delta * dt;
+   if (LightPos[0]>15.0 || LightPos[0]<-15.0)
+      Delta = -Delta;
+
+   glutPostRedisplay();
+}
+
+
+static void Display( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glLightfv(GL_LIGHT0, GL_POSITION, LightPos);
+
+   glPushMatrix();
+   glRotatef(90.0, 1.0, 0.0, 0.0);
+
+   if (Mode==0) {
+      /* Typical method: diffuse + specular + texture */
+      glEnable(GL_TEXTURE_2D);
+      glLightfv(GL_LIGHT0, GL_DIFFUSE, White);  /* enable diffuse */
+      glLightfv(GL_LIGHT0, GL_SPECULAR, White);  /* enable specular */
+#ifdef GL_VERSION_1_2
+      glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SINGLE_COLOR);
+#endif
+      glCallList(Sphere);
+   }
+   else if (Mode==1) {
+      /* just specular highlight */
+      glDisable(GL_TEXTURE_2D);
+      glLightfv(GL_LIGHT0, GL_DIFFUSE, Black);  /* disable diffuse */
+      glLightfv(GL_LIGHT0, GL_SPECULAR, White);  /* enable specular */
+#ifdef GL_VERSION_1_2
+      glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SINGLE_COLOR);
+#endif
+      glCallList(Sphere);
+   }
+   else if (Mode==2) {
+      /* diffuse textured */
+      glEnable(GL_TEXTURE_2D);
+      glLightfv(GL_LIGHT0, GL_DIFFUSE, White);  /* enable diffuse */
+      glLightfv(GL_LIGHT0, GL_SPECULAR, Black);  /* disable specular */
+#ifdef GL_VERSION_1_2
+      glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SINGLE_COLOR);
+#endif
+      glCallList(Sphere);
+   }
+   else if (Mode==3) {
+      /* 2-pass: diffuse textured then add specular highlight*/
+      glEnable(GL_TEXTURE_2D);
+      glLightfv(GL_LIGHT0, GL_DIFFUSE, White);  /* enable diffuse */
+      glLightfv(GL_LIGHT0, GL_SPECULAR, Black);  /* disable specular */
+#ifdef GL_VERSION_1_2
+      glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SINGLE_COLOR);
+#endif
+      glCallList(Sphere);
+      /* specular highlight */
+      glDepthFunc(GL_EQUAL);  /* redraw same pixels */
+      glDisable(GL_TEXTURE_2D);
+      glEnable(GL_BLEND);  /* add */
+      glLightfv(GL_LIGHT0, GL_DIFFUSE, Black);  /* disable diffuse */
+      glLightfv(GL_LIGHT0, GL_SPECULAR, White);  /* enable specular */
+      glCallList(Sphere);
+      glDepthFunc(GL_LESS);
+      glDisable(GL_BLEND);
+   }
+   else if (Mode==4) {
+      /* OpenGL 1.2's separate diffuse and specular color */
+      glEnable(GL_TEXTURE_2D);
+      glLightfv(GL_LIGHT0, GL_DIFFUSE, White);  /* enable diffuse */
+      glLightfv(GL_LIGHT0, GL_SPECULAR, White);  /* enable specular */
+#ifdef GL_VERSION_1_2
+      glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
+#endif
+      glCallList(Sphere);
+   }
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -12.0 );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+   case 27:
+      exit(0);
+      break;
+   case 's':
+      smooth = !smooth;
+      if (smooth)
+         glShadeModel(GL_SMOOTH);
+      else
+         glShadeModel(GL_FLAT);
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         break;
+      case GLUT_KEY_DOWN:
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+   int i, j;
+   GLubyte texImage[64][64][3];
+
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 0);
+   glLightModelfv(GL_LIGHT_MODEL_AMBIENT, Black);
+
+   glShadeModel(GL_SMOOTH);
+
+   glMaterialfv(GL_FRONT, GL_DIFFUSE, White);
+   glMaterialfv(GL_FRONT, GL_SPECULAR, White);
+   glMaterialf(GL_FRONT, GL_SHININESS, 20.0);
+
+   /* Actually, these are set again later */
+   glLightfv(GL_LIGHT0, GL_DIFFUSE, White);
+   glLightfv(GL_LIGHT0, GL_SPECULAR, White);
+
+   Quadric = gluNewQuadric();
+   gluQuadricTexture( Quadric, GL_TRUE );
+
+   Sphere= glGenLists(1);
+   glNewList( Sphere, GL_COMPILE );
+   gluSphere( Quadric, 1.0, 24, 24 );
+   glEndList();
+
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_CULL_FACE);
+
+   for (i=0;i<64;i++) {
+      for (j=0;j<64;j++) {
+         int k = ((i>>3)&1) ^ ((j>>3)&1);
+         texImage[i][j][0] = 255*k;
+         texImage[i][j][1] = 255*(1-k);
+         texImage[i][j][2] = 0;
+      }
+   }
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   glTexImage2D( GL_TEXTURE_2D,
+                 0,
+                 3,
+                 64, 64,
+                 0,
+                 GL_RGB, GL_UNSIGNED_BYTE,
+                 texImage );
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+   glEnable(GL_TEXTURE_2D);
+
+   glBlendFunc(GL_ONE, GL_ONE);
+}
+
+
+static void ModeMenu(int entry)
+{
+   if (entry==99)
+      exit(0);
+   Mode = entry;
+}
+
+
+int main( int argc, char *argv[] )
+{
+
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 300, 300 );
+
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+
+   glutCreateWindow( "spectex" );
+
+   Init();
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+   glutIdleFunc( Idle );
+
+   glutCreateMenu( ModeMenu );
+   glutAddMenuEntry("1-pass lighting + texturing", 0);
+   glutAddMenuEntry("specular lighting", 1);
+   glutAddMenuEntry("diffuse lighting + texturing", 2);
+   glutAddMenuEntry("2-pass lighting + texturing", 3);
+#ifdef GL_VERSION_1_2
+   glutAddMenuEntry("OpenGL 1.2 separate specular", 4);
+#endif
+   glutAddMenuEntry("Quit", 99);
+   glutAttachMenu(GLUT_RIGHT_BUTTON);
+
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/spriteblast.c b/progs/demos/spriteblast.c
new file mode 100644
index 000000000..d6e9a4de2
--- /dev/null
+++ b/progs/demos/spriteblast.c
@@ -0,0 +1,554 @@
+
+/* Copyright (c) Mark J. Kilgard, 1997.  */
+
+/* This program is freely distributable without licensing fees 
+   and is provided without guarantee or warrantee expressed or 
+   implied. This program is -not- in the public domain. */
+
+/* This example demonstrates how to render particle effects
+   with OpenGL.  A cloud of pinkish/orange particles explodes with the
+   particles bouncing off the ground.  When the EXT_point_parameters
+   is present , the particle size is attenuated based on eye distance. */
+
+
+/* Modified by Brian Paul to test GL_ARB_point_sprite */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>       /* for cos(), sin(), and sqrt() */
+#ifdef _WIN32
+#include <windows.h>
+#endif
+#define GL_GLEXT_PROTOTYPES
+#include <GL/glut.h>
+
+/* Some <math.h> files do not define M_PI... */
+#ifndef M_PI
+#define M_PI 3.14159265
+#endif
+
+#if 0  /* For debugging. */
+#undef GL_EXT_point_parameters
+#endif
+
+static GLfloat angle = -150;   /* in degrees */
+static int spin = 0;
+static int moving, begin;
+static float theTime;
+static int repeat = 1;
+static int blend = 1;
+int useMipmaps = 1;
+int linearFiltering = 1;
+
+static GLfloat constant[3] = { .2,  0.0,     0.0 };
+static GLfloat linear[3]   = { .0,   .1,     0.0 };
+static GLfloat theQuad[3]  = { .005, 0.1, 1/600.0 };
+
+#define MAX_POINTS 2000
+
+static int numPoints = 200;
+
+static GLfloat pointList[MAX_POINTS][3];
+static GLfloat pointTime[MAX_POINTS];
+static GLfloat pointVelocity[MAX_POINTS][2];
+static GLfloat pointDirection[MAX_POINTS][2];
+static int colorList[MAX_POINTS];
+static int animate = 1, motion = 0, org = 0, sprite = 1, smooth = 1;
+
+static GLfloat colorSet[][4] = {
+  /* Shades of red. */
+  { 0.7, 0.2, 0.4, 0.5 },
+  { 0.8, 0.0, 0.7, 0.5 },
+  { 1.0, 0.0, 0.0, 0.5 },
+  { 0.9, 0.3, 0.6, 0.5 },
+  { 1.0, 0.4, 0.0, 0.5 },
+  { 1.0, 0.0, 0.5, 0.5 },
+};
+
+#define NUM_COLORS (sizeof(colorSet)/sizeof(colorSet[0]))
+
+#define DEAD (NUM_COLORS+1)
+
+
+/* GL */
+static GLint spritePattern[16][16] = {
+   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+   { 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0 },
+   { 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0 },
+   { 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0 },
+   { 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0 },
+   { 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0 },
+   { 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0 },
+   { 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0 },
+   { 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0 },
+   { 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0 },
+   { 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0 },
+   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
+};
+
+
+
+
+#if 0  /* drand48 might be better on Unix machines */
+#define RANDOM_RANGE(lo, hi) ((lo) + (hi - lo) * drand48())
+#else
+static float float_rand(void) { return rand() / (float) RAND_MAX; }
+#define RANDOM_RANGE(lo, hi) ((lo) + (hi - lo) * float_rand())
+#endif
+
+#define MEAN_VELOCITY 3.0
+#define GRAVITY 2.0
+
+/* Modeling units of ground extent in each X and Z direction. */
+#define EDGE 12
+
+static void
+makePointList(void)
+{
+  float angle, velocity, direction;
+  int i;
+
+  motion = 1;
+  for (i=0; i<numPoints; i++) {
+    pointList[i][0] = 0.0;
+    pointList[i][1] = 0.0;
+    pointList[i][2] = 0.0;
+    pointTime[i] = 0.0;
+    angle = (RANDOM_RANGE(60.0, 70.0)) * M_PI/180.0;
+    direction = RANDOM_RANGE(0.0, 360.0) * M_PI/180.0;
+    pointDirection[i][0] = cos(direction);
+    pointDirection[i][1] = sin(direction);
+    velocity = MEAN_VELOCITY + RANDOM_RANGE(-0.8, 1.0);
+    pointVelocity[i][0] = velocity * cos(angle);
+    pointVelocity[i][1] = velocity * sin(angle);
+    colorList[i] = rand() % NUM_COLORS;
+  }
+  theTime = 0.0;
+}
+
+static void
+updatePointList(void)
+{
+  float distance;
+  int i;
+
+  static double t0 = -1.;
+  double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+  if (t0 < 0.0)
+    t0 = t;
+  dt = t - t0;
+  t0 = t;
+
+  motion = 0;
+  for (i=0; i<numPoints; i++) {
+    distance = pointVelocity[i][0] * theTime;
+
+    /* X and Z */
+    pointList[i][0] = pointDirection[i][0] * distance;
+    pointList[i][2] = pointDirection[i][1] * distance;
+
+    /* Z */
+    pointList[i][1] =
+      (pointVelocity[i][1] - 0.5 * GRAVITY * pointTime[i])*pointTime[i];
+
+    /* If we hit the ground, bounce the point upward again. */
+    if (pointList[i][1] <= 0.0) {
+      if (distance > EDGE) {
+        /* Particle has hit ground past the distance duration of
+          the particles.  Mark particle as dead. */
+       colorList[i] = NUM_COLORS;  /* Not moving. */
+       continue;
+      }
+
+      pointVelocity[i][1] *= 0.8;  /* 80% of previous up velocity. */
+      pointTime[i] = 0.0;  /* Reset the particles sense of up time. */
+    }
+    motion = 1;
+    pointTime[i] += dt;
+  }
+  theTime += dt;
+  if (!motion && !spin) {
+    if (repeat) {
+      makePointList();
+    } else {
+      glutIdleFunc(NULL);
+    }
+  }
+}
+
+static void
+idle(void)
+{
+  updatePointList();
+  if (spin) {
+    angle += 0.3;
+  }
+  glutPostRedisplay();
+}
+
+static void
+visible(int vis)
+{
+  if (vis == GLUT_VISIBLE) {
+    if (animate && (motion || spin)) {
+      glutIdleFunc(idle);
+    }
+  } else {
+    glutIdleFunc(NULL);
+  }
+}
+
+static void
+redraw(void)
+{
+  int i;
+
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+  glPushMatrix();
+  glRotatef(15.0, 1.0, 0.0, 0.0);
+  glRotatef(angle, 0.0, 1.0, 0.0);
+
+  glDepthMask(GL_FALSE);
+
+  /* Draw the floor. */
+/*  glEnable(GL_TEXTURE_2D);*/
+  glColor3f(0.1, 0.5, 1.0);
+  glBegin(GL_QUADS);
+    glTexCoord2f(0.0, 0.0);
+    glVertex3f(-EDGE, -0.05, -EDGE);
+    glTexCoord2f(20.0, 0.0);
+    glVertex3f(EDGE, -0.05, -EDGE);
+    glTexCoord2f(20.0, 20.0);
+    glVertex3f(EDGE, -0.05, EDGE);
+    glTexCoord2f(0.0, 20.0);
+    glVertex3f(-EDGE, -0.05, EDGE);
+  glEnd();
+
+  /* Allow particles to blend with each other. */
+  glDepthMask(GL_TRUE);
+
+  if (blend)
+     glEnable(GL_BLEND);
+
+  if (sprite) {
+     glEnable(GL_TEXTURE_2D);
+#ifdef GL_ARB_point_sprite
+     glEnable(GL_POINT_SPRITE_ARB);
+#endif
+  }
+
+  glColor3f(1,1,1);
+  glBegin(GL_POINTS);
+    for (i=0; i<numPoints; i++) {
+      /* Draw alive particles. */
+      if (colorList[i] != DEAD) {
+        if (!sprite) glColor4fv(colorSet[colorList[i]]);
+        glVertex3fv(pointList[i]);
+      }
+    }
+  glEnd();
+
+  glDisable(GL_TEXTURE_2D);
+#ifdef GL_ARB_point_sprite
+  glDisable(GL_POINT_SPRITE_ARB);
+#endif
+  glDisable(GL_BLEND);
+
+  glPopMatrix();
+
+  glutSwapBuffers();
+}
+
+/* ARGSUSED2 */
+static void
+mouse(int button, int state, int x, int y)
+{
+  /* Scene can be spun around Y axis using left
+     mouse button movement. */
+  if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN) {
+    moving = 1;
+    begin = x;
+  }
+  if (button == GLUT_LEFT_BUTTON && state == GLUT_UP) {
+    moving = 0;
+  }
+}
+
+/* ARGSUSED1 */
+static void
+mouseMotion(int x, int y)
+{
+  if (moving) {
+    angle = angle + (x - begin);
+    begin = x;
+    glutPostRedisplay();
+  }
+}
+
+static void
+menu(int option)
+{
+  switch (option) {
+  case 0:
+    makePointList();
+    break;
+#ifdef GL_ARB_point_parameters
+  case 1:
+    glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, constant);
+    break;
+  case 2:
+    glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, linear);
+    break;
+  case 3:
+    glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, theQuad);
+    break;
+#endif
+  case 4:
+    blend = 1;
+    break;
+  case 5:
+    blend = 0;
+    break;
+#ifdef GL_ARB_point_parameters
+  case 6:
+    glPointParameterfARB(GL_POINT_FADE_THRESHOLD_SIZE_ARB, 1.0);
+    break;
+  case 7:
+    glPointParameterfARB(GL_POINT_FADE_THRESHOLD_SIZE_ARB, 10.0);
+    break;
+#endif
+  case 8:
+    glEnable(GL_POINT_SMOOTH);
+    smooth = 1;
+    break;
+  case 9:
+    glDisable(GL_POINT_SMOOTH);
+    smooth = 0;
+    break;
+  case 10:
+    glPointSize(4.0);
+    break;
+  case 11:
+    glPointSize(8.0);
+    break;
+  case 12:
+    glPointSize(16.0);
+    break;
+  case 13:
+    spin = 1 - spin;
+    if (animate && (spin || motion)) {
+      glutIdleFunc(idle);
+    } else {
+      glutIdleFunc(NULL);
+    }
+    break;
+  case 14:
+    numPoints = 200;
+    break;
+  case 15:
+    numPoints = 500;
+    break;
+  case 16:
+    numPoints = 1000;
+    break;
+  case 17:
+    numPoints = 2000;
+    break;
+  case 666:
+    exit(0);
+  }
+  glutPostRedisplay();
+}
+
+/* ARGSUSED1 */
+static void
+key(unsigned char c, int x, int y)
+{
+  switch (c) {
+  case 13:
+    animate = 1 - animate;  /* toggle. */
+    if (animate && (motion || spin)) {
+      glutIdleFunc(idle);
+    } else {
+      glutIdleFunc(NULL);
+    }
+    break;
+  case ' ':
+    animate = 1;
+    makePointList();
+    glutIdleFunc(idle);
+    break;
+  case 'o':
+  case 'O':
+    org ^= 1;
+#ifdef GL_VERSION_2_0
+#ifdef GL_ARB_point_parameters
+    glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN,
+                      org ? GL_LOWER_LEFT : GL_UPPER_LEFT);
+#endif
+#endif
+    glutPostRedisplay();
+    break;
+  case 't':
+  case 'T':
+    sprite ^= 1;
+    glutPostRedisplay();
+    break;
+  case 's':
+  case 'S':
+    (smooth ^= 1) ? glEnable(GL_POINT_SMOOTH) : glDisable(GL_POINT_SMOOTH);
+    glutPostRedisplay();
+    break;
+  case '0':
+    glPointSize(1.0);
+    glutPostRedisplay();
+    break;
+  case '1':
+    glPointSize(2.0);
+    glutPostRedisplay();
+    break;
+  case '2':
+    glPointSize(4.0);
+    glutPostRedisplay();
+    break;
+  case '3':
+    glPointSize(8.0);
+    glutPostRedisplay();
+    break;
+  case '4':
+    glPointSize(16.0);
+    glutPostRedisplay();
+    break;
+  case 27:
+    exit(0);
+  }
+}
+
+
+
+static void
+makeSprite(void)
+{
+   GLubyte texture[16][16][4];
+   int i, j;
+
+   if (!glutExtensionSupported("GL_ARB_point_sprite")) {
+      printf("Sorry, this demo requires GL_ARB_point_sprite.\n");
+      exit(0);
+   }
+   if (!glutExtensionSupported("GL_ARB_point_parameters")) {
+      printf("Sorry, this demo requires GL_ARB_point_parameters.\n");
+      exit(0);
+   }
+
+   for (i = 0; i < 16; i++) {
+      for (j = 0; j < 16; j++) {
+         if (spritePattern[i][j]) {
+            texture[i][j][0] = 255;
+            texture[i][j][1] = 255;
+            texture[i][j][2] = 255;
+            texture[i][j][3] = 255;
+         }
+         else {
+            texture[i][j][0] = 255;
+            texture[i][j][1] = 0;
+            texture[i][j][2] = 0;
+            texture[i][j][3] = 0;
+         }
+      }
+   }
+
+   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE,
+                texture);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+#ifdef GL_ARB_point_sprite
+   glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
+#endif
+}
+
+
+static void
+reshape(int width, int height)
+{
+  GLfloat h = (GLfloat) height / (GLfloat) width;
+
+  glViewport(0, 0, (GLint) width, (GLint) height);
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  glFrustum(-1.0, 1.0, -h, h, 2.0, 30.0);
+  glMatrixMode(GL_MODELVIEW);
+  glLoadIdentity();
+  glTranslatef(0.0, 0.0, -10.0);
+}
+
+int
+main(int argc, char **argv)
+{
+  int i;
+  glutInit(&argc, argv);
+  glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE);
+
+  for (i=1; i<argc; i++) {
+    if(!strcmp("-noms", argv[i])) {
+      glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+      printf("forcing no multisampling\n");
+    } else if(!strcmp("-nomipmaps", argv[i])) {
+      useMipmaps = 0;
+    } else if(!strcmp("-nearest", argv[i])) {
+      linearFiltering = 0;
+    }
+  }
+  glutInitWindowPosition(0, 0);
+  glutInitWindowSize(600,300);
+  glutCreateWindow("sprite blast");
+  glutReshapeFunc(reshape);
+  glutDisplayFunc(redraw);
+  glutMouseFunc(mouse);
+  glutMotionFunc(mouseMotion);
+  glutVisibilityFunc(visible);
+  glutKeyboardFunc(key);
+  glutCreateMenu(menu);
+  glutAddMenuEntry("Reset time", 0);
+  glutAddMenuEntry("Constant", 1);
+  glutAddMenuEntry("Linear", 2);
+  glutAddMenuEntry("Quadratic", 3);
+  glutAddMenuEntry("Blend on", 4);
+  glutAddMenuEntry("Blend off", 5);
+  glutAddMenuEntry("Threshold 1", 6);
+  glutAddMenuEntry("Threshold 10", 7);
+  glutAddMenuEntry("Point smooth on", 8);
+  glutAddMenuEntry("Point smooth off", 9);
+  glutAddMenuEntry("Point size 4", 10);
+  glutAddMenuEntry("Point size 8", 11);
+  glutAddMenuEntry("Point size 16", 12);
+  glutAddMenuEntry("Toggle spin", 13);
+  glutAddMenuEntry("200 points ", 14);
+  glutAddMenuEntry("500 points ", 15);
+  glutAddMenuEntry("1000 points ", 16);
+  glutAddMenuEntry("2000 points ", 17);
+  glutAddMenuEntry("Quit", 666);
+  glutAttachMenu(GLUT_RIGHT_BUTTON);
+
+  glShadeModel(GL_FLAT);
+  glEnable(GL_DEPTH_TEST);
+  glEnable(GL_POINT_SMOOTH);
+  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+  glPointSize(16.0);
+#ifdef GL_ARB_point_parameters
+  glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, theQuad);
+#endif
+
+  makePointList();
+  makeSprite();
+
+  glutMainLoop();
+  return 0;             /* ANSI C requires main to return int. */
+}
diff --git a/progs/demos/stex3d.c b/progs/demos/stex3d.c
new file mode 100644
index 000000000..e4554d071
--- /dev/null
+++ b/progs/demos/stex3d.c
@@ -0,0 +1,678 @@
+/*----------------------------- 
+ * stex3d.c GL example of the mesa 3d-texture extention to simulate procedural
+ *            texturing, it uses a perlin noise and turbulence functions.
+ * 
+ * Author:   Daniel Barrero
+ *           barrero@irit.fr
+ *           dbarrero@pegasus.uniandes.edu.co
+ *
+ * Converted to GLUT by brianp on 1/1/98
+ * Massive clean-up on 2002/10/23 by brianp
+ *
+ *      
+ * cc stex3d.c -o stex3d -lglut -lMesaGLU -lMesaGL -lX11 -lXext -lm 
+ *
+ *---------------------------- */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/gl.h>
+#include <GL/glut.h>
+
+
+#ifndef M_PI
+#define M_PI            3.14159265358979323846
+#endif
+
+#define NOISE_TEXTURE 1
+#define GRADIENT_TEXTURE 2
+
+#define TORUS 1
+#define SPHERE 2
+
+static int tex_width=64, tex_height=64, tex_depth=64;
+static float angx=0, angy=0, angz=0;
+static int texgen = 2, animate = 1, smooth = 1, wireframe = 0;
+static int CurTexture = NOISE_TEXTURE, CurObject = TORUS;
+
+
+static void
+BuildTorus(void)
+{
+   GLint i, j;
+   float theta1, phi1, theta2, phi2, rings, sides;
+   float v0[03], v1[3], v2[3], v3[3];
+   float t0[03], t1[3], t2[3], t3[3];
+   float n0[3], n1[3], n2[3], n3[3];
+   float innerRadius = 0.25;
+   float outerRadius = 0.5;
+   float scalFac;
+
+   rings = 16;
+   sides = 12;
+   scalFac = 1 / (outerRadius * 2);
+
+   glNewList(TORUS, GL_COMPILE);
+   for (i = 0; i < rings; i++) {
+      theta1 = (float) i *2.0 * M_PI / rings;
+      theta2 = (float) (i + 1) * 2.0 * M_PI / rings;
+      for (j = 0; j < sides; j++) {
+	 phi1 = (float) j *2.0 * M_PI / sides;
+	 phi2 = (float) (j + 1) * 2.0 * M_PI / sides;
+
+	 v0[0] = cos(theta1) * (outerRadius + innerRadius * cos(phi1));
+	 v0[1] = -sin(theta1) * (outerRadius + innerRadius * cos(phi1));
+	 v0[2] = innerRadius * sin(phi1);
+
+	 v1[0] = cos(theta2) * (outerRadius + innerRadius * cos(phi1));
+	 v1[1] = -sin(theta2) * (outerRadius + innerRadius * cos(phi1));
+	 v1[2] = innerRadius * sin(phi1);
+	 v2[0] = cos(theta2) * (outerRadius + innerRadius * cos(phi2));
+	 v2[1] = -sin(theta2) * (outerRadius + innerRadius * cos(phi2));
+	 v2[2] = innerRadius * sin(phi2);
+
+	 v3[0] = cos(theta1) * (outerRadius + innerRadius * cos(phi2));
+	 v3[1] = -sin(theta1) * (outerRadius + innerRadius * cos(phi2));
+	 v3[2] = innerRadius * sin(phi2);
+
+	 n0[0] = cos(theta1) * (cos(phi1));
+	 n0[1] = -sin(theta1) * (cos(phi1));
+	 n0[2] = sin(phi1);
+
+	 n1[0] = cos(theta2) * (cos(phi1));
+	 n1[1] = -sin(theta2) * (cos(phi1));
+	 n1[2] = sin(phi1);
+
+	 n2[0] = cos(theta2) * (cos(phi2));
+	 n2[1] = -sin(theta2) * (cos(phi2));
+	 n2[2] = sin(phi2);
+
+	 n3[0] = cos(theta1) * (cos(phi2));
+	 n3[1] = -sin(theta1) * (cos(phi2));
+	 n3[2] = sin(phi2);
+
+	 t0[0] = v0[0] * scalFac + 0.5;
+	 t0[1] = v0[1] * scalFac + 0.5;
+	 t0[2] = v0[2] * scalFac + 0.5;
+
+	 t1[0] = v1[0] * scalFac + 0.5;
+	 t1[1] = v1[1] * scalFac + 0.5;
+	 t1[2] = v1[2] * scalFac + 0.5;
+
+	 t2[0] = v2[0] * scalFac + 0.5;
+	 t2[1] = v2[1] * scalFac + 0.5;
+	 t2[2] = v2[2] * scalFac + 0.5;
+
+	 t3[0] = v3[0] * scalFac + 0.5;
+	 t3[1] = v3[1] * scalFac + 0.5;
+	 t3[2] = v3[2] * scalFac + 0.5;
+
+	 glBegin(GL_POLYGON);
+	 glNormal3fv(n3);
+	 glTexCoord3fv(t3);
+	 glVertex3fv(v3);
+	 glNormal3fv(n2);
+	 glTexCoord3fv(t2);
+	 glVertex3fv(v2);
+	 glNormal3fv(n1);
+	 glTexCoord3fv(t1);
+	 glVertex3fv(v1);
+	 glNormal3fv(n0);
+	 glTexCoord3fv(t0);
+	 glVertex3fv(v0);
+	 glEnd();
+      }
+   }
+   glEndList();
+}
+
+
+/*--------------------------------------------------------------------
+ noise function over R3 - implemented by a pseudorandom tricubic spline 
+              EXCERPTED FROM SIGGRAPH 92, COURSE 23
+                        PROCEDURAL MODELING
+                             Ken Perlin
+                           New York University
+----------------------------------------------------------------------*/
+
+
+#define DOT(a,b) (a[0] * b[0] + a[1] * b[1] + a[2] * b[2])
+#define B 128
+static int p[B + B + 2];
+static float g[B + B + 2][3];
+#define setup(i,b0,b1,r0,r1) \
+        t = vec[i] + 10000.; \
+        b0 = ((int)t) & (B-1); \
+        b1 = (b0+1) & (B-1); \
+        r0 = t - (int)t; \
+        r1 = r0 - 1.;
+
+static float
+noise3(float vec[3])
+{
+   int bx0, bx1, by0, by1, bz0, bz1, b00, b10, b01, b11;
+   float rx0, rx1, ry0, ry1, rz0, rz1, *q, sx, sy, sz, a, b, c, d, t, u, v;
+   register int i, j;
+
+   setup(0, bx0, bx1, rx0, rx1);
+   setup(1, by0, by1, ry0, ry1);
+   setup(2, bz0, bz1, rz0, rz1);
+
+   i = p[bx0];
+   j = p[bx1];
+
+   b00 = p[i + by0];
+   b10 = p[j + by0];
+   b01 = p[i + by1];
+   b11 = p[j + by1];
+
+#define at(rx,ry,rz) ( rx * q[0] + ry * q[1] + rz * q[2] )
+#define surve(t) ( t * t * (3. - 2. * t) )
+#define lerp(t, a, b) ( a + t * (b - a) )
+
+   sx = surve(rx0);
+   sy = surve(ry0);
+   sz = surve(rz0);
+
+   q = g[b00 + bz0];
+   u = at(rx0, ry0, rz0);
+   q = g[b10 + bz0];
+   v = at(rx1, ry0, rz0);
+   a = lerp(sx, u, v);
+
+   q = g[b01 + bz0];
+   u = at(rx0, ry1, rz0);
+   q = g[b11 + bz0];
+   v = at(rx1, ry1, rz0);
+   b = lerp(sx, u, v);
+
+   c = lerp(sy, a, b);		/* interpolate in y at lo x */
+
+   q = g[b00 + bz1];
+   u = at(rx0, ry0, rz1);
+   q = g[b10 + bz1];
+   v = at(rx1, ry0, rz1);
+   a = lerp(sx, u, v);
+
+   q = g[b01 + bz1];
+   u = at(rx0, ry1, rz1);
+   q = g[b11 + bz1];
+   v = at(rx1, ry1, rz1);
+   b = lerp(sx, u, v);
+
+   d = lerp(sy, a, b);		/* interpolate in y at hi x */
+
+   return 1.5 * lerp(sz, c, d);	/* interpolate in z */
+}
+
+static void
+initNoise(void)
+{
+   /*long random(); */
+   int i, j, k;
+   float v[3], s;
+
+   /* Create an array of random gradient vectors uniformly on the unit sphere */
+   /*srandom(1); */
+   srand(1);
+   for (i = 0; i < B; i++) {
+      do {			/* Choose uniformly in a cube */
+	 for (j = 0; j < 3; j++)
+	    v[j] = (float) ((rand() % (B + B)) - B) / B;
+	 s = DOT(v, v);
+      } while (s > 1.0);	/* If not in sphere try again */
+      s = sqrt(s);
+      for (j = 0; j < 3; j++)	/* Else normalize */
+	 g[i][j] = v[j] / s;
+   }
+
+   /* Create a pseudorandom permutation of [1..B] */
+   for (i = 0; i < B; i++)
+      p[i] = i;
+   for (i = B; i > 0; i -= 2) {
+      k = p[i];
+      p[i] = p[j = rand() % B];
+      p[j] = k;
+   }
+
+   /* Extend g and p arrays to allow for faster indexing */
+   for (i = 0; i < B + 2; i++) {
+      p[B + i] = p[i];
+      for (j = 0; j < 3; j++)
+	 g[B + i][j] = g[i][j];
+   }
+}
+
+
+static float
+turbulence(float point[3], float lofreq, float hifreq)
+{
+   float freq, t, p[3];
+
+   p[0] = point[0] + 123.456;
+   p[1] = point[1];
+   p[2] = point[2];
+
+   t = 0;
+   for (freq = lofreq; freq < hifreq; freq *= 2.) {
+      t += fabs(noise3(p)) / freq;
+      p[0] *= 2.;
+      p[1] *= 2.;
+      p[2] *= 2.;
+   }
+   return t - 0.3;		/* readjust to make mean value = 0.0 */
+}
+
+
+static void
+create3Dtexture(void)
+{
+   unsigned char *voxels = NULL;
+   int i, j, k;
+   unsigned char *vp;
+   float vec[3];
+   int tmp;
+
+   printf("creating 3d textures...\n");
+   voxels =
+      (unsigned char *)
+      malloc((size_t) (4 * tex_width * tex_height * tex_depth));
+   vp = voxels;
+   for (i = 0; i < tex_width; i++) {
+      vec[0] = i;
+      for (j = 0; j < tex_height; j++) {
+	 vec[1] = j;
+	 for (k = 0; k < tex_depth; k++) {
+	    vec[2] = k;
+	    tmp = (sin(k * i * j + turbulence(vec, 0.01, 1)) + 1) * 127.5;
+	    *vp++ = 0;
+	    *vp++ = 0;
+	    *vp++ = tmp;
+	    *vp++ = tmp + 128;
+	 }
+      }
+   }
+
+   printf("setting up 3d texture...\n");
+
+   glBindTexture(GL_TEXTURE_3D, NOISE_TEXTURE);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_REPEAT);
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA,
+		tex_width, tex_height, tex_depth,
+		0, GL_RGBA, GL_UNSIGNED_BYTE, voxels);
+
+   free(voxels);
+
+   printf("finished setting up 3d texture image.\n");
+}
+
+
+static void
+printHelp(void)
+{
+   printf("\nUsage: stex3d  <cmd line options>\n");
+   printf(" cmd line options:\n");
+   printf("      -wxxx   Width of the texture (Default=64)\n");
+   printf("      -hxxx   Height of the texture (Default=64)\n");
+   printf("      -dxxx   Depth of the texture (Default=64)\n");
+   printf(" Keyboard Options:\n");
+   printf("    up/down   rotate around X\n");
+   printf("  left/right  rotate around Y\n");
+   printf("      z/Z     rotate around Z\n");
+   printf("       a      toggle animation\n");
+   printf("       s      toggle smooth shading\n");
+   printf("       t      toggle texgen mode\n");
+   printf("       o      toggle object: torus/sphere\n");
+   printf("       i      toggle texture image: noise/gradient\n");
+}
+
+
+static GLenum
+parseCmdLine(int argc, char **argv)
+{
+   GLint i;
+
+   for (i = 1; i < argc; i++) {
+      if (strstr(argv[i], "-w") == 0) {
+	 tex_width = atoi((argv[i]) + 2);
+      }
+      else if (strstr(argv[i], "-h") == 0) {
+	 tex_height = atoi((argv[i]) + 2);
+      }
+      else if (strstr(argv[i], "-d") == 0) {
+	 tex_depth = atoi((argv[i]) + 2);
+      }
+      else if (strcmp(argv[i], "-help") == 0) {
+	 printHelp();
+	 return GL_FALSE;
+      }
+      else {
+	 printf("%s (Bad option).\n", argv[i]);
+	 printHelp();
+	 return GL_FALSE;
+      }
+   }
+   if (tex_width == 0 || tex_height == 0 || tex_depth == 0) {
+      printf("%s (Bad option).\n", "size parameters can't be 0");
+      printHelp();
+      return GL_FALSE;
+   }
+   return GL_TRUE;
+}
+
+
+static void
+drawScene(void)
+{
+   static const GLfloat sPlane[4] = { 0.5, 0, 0, -.5 };
+   static const GLfloat tPlane[4] = { 0, 0.5, 0, -.5 };
+   static const GLfloat rPlane[4] = { 0, 0, 0.5, -.5 };
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   glPushMatrix();
+   if (texgen == 2) {
+      glTexGenfv(GL_S, GL_EYE_PLANE, sPlane);
+      glTexGenfv(GL_T, GL_EYE_PLANE, tPlane);
+      glTexGenfv(GL_R, GL_EYE_PLANE, rPlane);
+   }
+
+   glRotatef(angx, 1.0, 0.0, 0.0);
+   glRotatef(angy, 0.0, 1.0, 0.0);
+   glRotatef(angz, 0.0, 0.0, 1.0);
+
+   if (texgen == 1) {
+      glTexGenfv(GL_S, GL_EYE_PLANE, sPlane);
+      glTexGenfv(GL_T, GL_EYE_PLANE, tPlane);
+      glTexGenfv(GL_R, GL_EYE_PLANE, rPlane);
+   }
+
+   if (texgen) {
+      glEnable(GL_TEXTURE_GEN_S);
+      glEnable(GL_TEXTURE_GEN_T);
+      glEnable(GL_TEXTURE_GEN_R);
+   }
+   else {
+      glDisable(GL_TEXTURE_GEN_S);
+      glDisable(GL_TEXTURE_GEN_T);
+      glDisable(GL_TEXTURE_GEN_R);
+   }
+
+   glCallList(CurObject);
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void
+resize(int w, int h)
+{
+   float ar = (float) w / (float) h;
+   float ax = 0.6 * ar;
+   float ay = 0.6;
+   glViewport(0, 0, (GLint) w, (GLint) h);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum(-ax, ax, -ay, ay, 2, 20);
+   /*glOrtho(-2, 2, -2, 2, -10, 10);*/
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0, 0, -4);
+}
+
+
+static void
+Idle(void)
+{
+   float t = glutGet(GLUT_ELAPSED_TIME);
+   angx = 0.01 * t;
+   angy = 0.03 * t;
+   angz += 0;
+   glutPostRedisplay();
+}
+
+
+static void
+SpecialKey(int k, int x, int y)
+{
+  switch (k) {
+  case GLUT_KEY_UP:
+    angx += 5.0;
+    break;
+  case GLUT_KEY_DOWN:
+    angx -= 5.0;
+    break;
+  case GLUT_KEY_LEFT:
+    angy += 5.0;
+    break;
+  case GLUT_KEY_RIGHT:
+    angy -= 5.0;
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
+
+static void
+KeyHandler(unsigned char key, int x, int y)
+{
+   static const char *mode[] = {
+      "glTexCoord3f (no texgen)",
+      "texgen fixed to object coords",
+      "texgen fixed to eye coords"
+   };
+   (void) x;
+   (void) y;
+   switch (key) {
+   case 27:
+   case 'q':
+   case 'Q':			/* quit game. */
+      exit(0);
+      break;
+   case 'z':
+      angz += 10;
+      break;
+   case 'Z':
+      angz -= 10;
+      break;
+   case 's':
+      smooth = !smooth;
+      if (smooth)
+         glShadeModel(GL_SMOOTH);
+      else
+         glShadeModel(GL_FLAT);
+      break;
+   case 't':
+      texgen++;
+      if (texgen > 2)
+         texgen = 0;
+      printf("Texgen: %s\n", mode[texgen]);
+      break;
+   case 'o':
+      if (CurObject == TORUS)
+         CurObject = SPHERE;
+      else
+         CurObject = TORUS;
+      break;
+   case 'i':
+      if (CurTexture == NOISE_TEXTURE)
+         CurTexture = GRADIENT_TEXTURE;
+      else
+         CurTexture = NOISE_TEXTURE;
+      glBindTexture(GL_TEXTURE_3D, CurTexture);
+      break;
+   case 'a':
+      animate = !animate;
+      if (animate)
+         glutIdleFunc(Idle);
+      else
+         glutIdleFunc(NULL);
+      break;
+   case 'w':
+      wireframe = !wireframe;
+      if (wireframe)
+         glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+      else
+         glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+      break;
+   default:
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+create3Dgradient(void)
+{
+   unsigned char *v;
+   int i, j, k;
+   unsigned char *voxels = NULL;
+
+   voxels = (unsigned char *) malloc(4 * tex_width * tex_height * tex_depth);
+   v = voxels;
+
+   for (i = 0; i < tex_depth; i++) {
+      for (j = 0; j < tex_height; j++) {
+	 for (k = 0; k < tex_width; k++) {
+	    GLint r = (255 * i) / (tex_depth - 1);
+	    GLint g = (255 * j) / (tex_height - 1);
+	    GLint b = (255 * k) / (tex_width - 1);
+	    *v++ = r;
+	    *v++ = g;
+	    *v++ = b;
+	    *v++ = 255;
+	 }
+      }
+   }
+
+
+   glBindTexture(GL_TEXTURE_3D, GRADIENT_TEXTURE);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_REPEAT);
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA,
+		tex_width, tex_height, tex_depth,
+		0, GL_RGBA, GL_UNSIGNED_BYTE, voxels);
+
+   free(voxels);
+}
+
+
+
+static void
+init(void)
+{
+   static const GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
+   static const GLfloat mat_shininess[] = { 25.0 };
+   static const GLfloat gray[] = { 0.6, 0.6, 0.6, 0.0 };
+   static const GLfloat white[] = { 1.0, 1.0, 1.0, 0.0 };
+   static const GLfloat light_position[] = { 0.0, 1.0, 1.0, 0.0 };
+
+   int max;
+
+   /* see if we have OpenGL 1.2 or later, for 3D texturing */
+   {
+      const char *version = (const char *) glGetString(GL_VERSION);
+      if (strncmp(version, "1.0", 3) == 0 || strncmp(version, "1.1", 3) == 0) {
+	 printf("Sorry, OpenGL 1.2 or later is required\n");
+	 exit(1);
+      }
+   }
+   printf("GL_RENDERER: %s\n", (char *) glGetString(GL_RENDERER));
+   glGetIntegerv(GL_MAX_3D_TEXTURE_SIZE, &max);
+   printf("GL_MAX_3D_TEXTURE_SIZE: %d\n", max);
+   printf("Current 3D texture size: %d x %d x %d\n",
+          tex_width, tex_height, tex_depth);
+
+   /* init light */
+   glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
+   glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
+   glLightfv(GL_LIGHT1, GL_POSITION, light_position);
+   glLightfv(GL_LIGHT1, GL_AMBIENT, gray);
+   glLightfv(GL_LIGHT1, GL_DIFFUSE, white);
+   glLightfv(GL_LIGHT1, GL_SPECULAR, white);
+   glColorMaterial(GL_FRONT, GL_DIFFUSE);
+   glEnable(GL_COLOR_MATERIAL);
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT1);
+
+   glClearColor(.5, .5, .5, 0);
+
+   {
+      GLUquadricObj *q;
+      q = gluNewQuadric();
+      gluQuadricTexture( q, GL_TRUE );
+      glNewList(SPHERE, GL_COMPILE);
+      gluSphere( q, 0.95, 30, 15 );
+      glEndList();
+      gluDeleteQuadric(q);
+   }
+
+   BuildTorus();
+
+
+   create3Dgradient();
+
+   initNoise();
+   create3Dtexture();
+
+   glEnable(GL_TEXTURE_3D);
+
+   /*
+      glBlendFunc(GL_SRC_COLOR, GL_SRC_ALPHA);
+      glEnable(GL_BLEND); 
+    */
+   glEnable(GL_DEPTH_TEST);
+
+   glColor3f(0.6, 0.7, 0.8);
+}
+
+
+int
+main(int argc, char **argv)
+{
+   glutInit(&argc, argv);
+
+   if (parseCmdLine(argc, argv) == GL_FALSE) {
+      exit(0);
+   }
+
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(400, 400);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+
+   if (glutCreateWindow("stex3d") <= 0) {
+      exit(0);
+   }
+
+   init();
+
+   printHelp();
+
+   glutReshapeFunc(resize);
+   glutKeyboardFunc(KeyHandler);
+   glutSpecialFunc(SpecialKey);
+   glutDisplayFunc(drawScene);
+   if (animate)
+      glutIdleFunc(Idle);
+   glutMainLoop();
+   return 0;
+}
+
diff --git a/progs/demos/teapot.c b/progs/demos/teapot.c
new file mode 100644
index 000000000..38ede7ac3
--- /dev/null
+++ b/progs/demos/teapot.c
@@ -0,0 +1,675 @@
+/*
+ * This program is under the GNU GPL.
+ * Use at your own risk.
+ *
+ * written by David Bucciarelli (tech.hmw@plus.it)
+ *            Humanware s.r.l.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <time.h>
+#include <string.h>
+
+#ifdef WIN32
+#include <windows.h>
+#endif
+
+#include <GL/glut.h>
+#include "readtex.h"
+
+#ifdef XMESA
+#include "GL/xmesa.h"
+static int fullscreen=1;
+#endif
+
+static int WIDTH=640;
+static int HEIGHT=480;
+
+static GLint T0 = 0;
+static GLint Frames = 0;
+
+#define BASESIZE 10.0
+
+#define BASERES 12
+#define TEAPOTRES 3
+
+#ifndef M_PI
+#define M_PI 3.1415926535
+#endif
+
+extern void shadowmatrix(GLfloat [4][4], GLfloat [4], GLfloat [4]);
+extern void findplane(GLfloat [4], GLfloat [3], GLfloat [3], GLfloat [3]);
+
+
+static int win=0;
+
+static float obs[3]={5.0,0.0,1.0};
+static float dir[3];
+static float v=0.0;
+static float alpha=-90.0;
+static float beta=90.0;
+
+static GLfloat baseshadow[4][4];
+static GLfloat lightpos[4]={2.3,0.0,3.0,1.0};
+static GLfloat lightdir[3]={-2.3,0.0,-3.0};
+static GLfloat lightalpha=0.0;
+
+static int fog=1;
+static int bfcull=1;
+static int usetex=1;
+static int help=1;
+static int joyavailable=0;
+static int joyactive=0;
+
+static GLuint t1id,t2id;
+static GLuint teapotdlist,basedlist,lightdlist;
+
+
+
+/******************** begin shadow code ********************/
+
+/* Taken from the projshadow.c - by Tom McReynolds, SGI */
+
+/* Modified by David Bucciarelli */
+
+enum {
+  X, Y, Z, W
+};
+enum {
+  A, B, C, D
+};
+
+/* create a matrix that will project the desired shadow */
+void
+shadowmatrix(GLfloat shadowMat[4][4],
+  GLfloat groundplane[4],
+  GLfloat lightpos[4])
+{
+  GLfloat dot;
+
+  /* find dot product between light position vector and ground plane normal */
+  dot = groundplane[X] * lightpos[X] +
+    groundplane[Y] * lightpos[Y] +
+    groundplane[Z] * lightpos[Z] +
+    groundplane[W] * lightpos[W];
+
+  shadowMat[0][0] = dot - lightpos[X] * groundplane[X];
+  shadowMat[1][0] = 0.f - lightpos[X] * groundplane[Y];
+  shadowMat[2][0] = 0.f - lightpos[X] * groundplane[Z];
+  shadowMat[3][0] = 0.f - lightpos[X] * groundplane[W];
+
+  shadowMat[X][1] = 0.f - lightpos[Y] * groundplane[X];
+  shadowMat[1][1] = dot - lightpos[Y] * groundplane[Y];
+  shadowMat[2][1] = 0.f - lightpos[Y] * groundplane[Z];
+  shadowMat[3][1] = 0.f - lightpos[Y] * groundplane[W];
+
+  shadowMat[X][2] = 0.f - lightpos[Z] * groundplane[X];
+  shadowMat[1][2] = 0.f - lightpos[Z] * groundplane[Y];
+  shadowMat[2][2] = dot - lightpos[Z] * groundplane[Z];
+  shadowMat[3][2] = 0.f - lightpos[Z] * groundplane[W];
+
+  shadowMat[X][3] = 0.f - lightpos[W] * groundplane[X];
+  shadowMat[1][3] = 0.f - lightpos[W] * groundplane[Y];
+  shadowMat[2][3] = 0.f - lightpos[W] * groundplane[Z];
+  shadowMat[3][3] = dot - lightpos[W] * groundplane[W];
+
+}
+
+/* find the plane equation given 3 points */
+void
+findplane(GLfloat plane[4],
+  GLfloat v0[3], GLfloat v1[3], GLfloat v2[3])
+{
+  GLfloat vec0[3], vec1[3];
+
+  /* need 2 vectors to find cross product */
+  vec0[X] = v1[X] - v0[X];
+  vec0[Y] = v1[Y] - v0[Y];
+  vec0[Z] = v1[Z] - v0[Z];
+
+  vec1[X] = v2[X] - v0[X];
+  vec1[Y] = v2[Y] - v0[Y];
+  vec1[Z] = v2[Z] - v0[Z];
+
+  /* find cross product to get A, B, and C of plane equation */
+  plane[A] = vec0[Y] * vec1[Z] - vec0[Z] * vec1[Y];
+  plane[B] = -(vec0[X] * vec1[Z] - vec0[Z] * vec1[X]);
+  plane[C] = vec0[X] * vec1[Y] - vec0[Y] * vec1[X];
+
+  plane[D] = -(plane[A] * v0[X] + plane[B] * v0[Y] + plane[C] * v0[Z]);
+}
+
+/******************** end shadow code ********************/
+
+
+static void calcposobs(void)
+{
+  dir[0]=sin(alpha*M_PI/180.0);
+  dir[1]=cos(alpha*M_PI/180.0)*sin(beta*M_PI/180.0);
+  dir[2]=cos(beta*M_PI/180.0);
+
+  obs[0]+=v*dir[0];
+  obs[1]+=v*dir[1];
+  obs[2]+=v*dir[2];
+}
+
+static void special(int k, int x, int y)
+{
+  switch(k) {
+  case GLUT_KEY_LEFT:
+    alpha-=2.0;
+    break;
+  case GLUT_KEY_RIGHT:
+    alpha+=2.0;
+    break;
+  case GLUT_KEY_DOWN:
+    beta-=2.0;
+    break;
+  case GLUT_KEY_UP:
+    beta+=2.0;
+    break;
+  }
+}
+
+static void key(unsigned char k, int x, int y)
+{
+  switch(k) {
+  case 27:
+    exit(0);
+    break;
+    
+  case 'a':
+    v+=0.005;
+    break;
+  case 'z':
+    v-=0.005;
+    break;
+
+  case 'j':
+    joyactive=(!joyactive);
+    break;
+  case 'h':
+    help=(!help);
+    break;
+  case 'f':
+    fog=(!fog);
+    break;
+  case 't':
+    usetex=(!usetex);
+    break;
+  case 'b':
+    if(bfcull) {
+      glDisable(GL_CULL_FACE);
+      bfcull=0;
+    } else {
+      glEnable(GL_CULL_FACE);
+      bfcull=1;
+    }
+    break;
+#ifdef XMESA
+  case ' ':
+    XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
+    fullscreen=(!fullscreen);
+    break;
+#endif
+  }
+}
+
+static void reshape(int w, int h) 
+{
+  WIDTH=w;
+  HEIGHT=h;
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  gluPerspective(45.0,w/(float)h,0.2,40.0);
+  glMatrixMode(GL_MODELVIEW);
+  glLoadIdentity();
+  glViewport(0,0,w,h);
+}
+
+static void printstring(void *font, char *string)
+{
+  int len,i;
+
+  len=(int)strlen(string);
+  for(i=0;i<len;i++)
+    glutBitmapCharacter(font,string[i]);
+}
+
+static void printhelp(void)
+{
+  glEnable(GL_BLEND);
+  glColor4f(0.5,0.5,0.5,0.5);
+  glRecti(40,40,600,440);
+  glDisable(GL_BLEND);
+
+  glColor3f(1.0,0.0,0.0);
+  glRasterPos2i(300,420);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"Help");
+
+  glRasterPos2i(60,390);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"h - Toggle Help");
+  glRasterPos2i(60,360);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"t - Toggle Textures");
+  glRasterPos2i(60,330);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"f - Toggle Fog");
+  glRasterPos2i(60,300);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"b - Toggle Back face culling");
+  glRasterPos2i(60,270);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"Arrow Keys - Rotate");
+  glRasterPos2i(60,240);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"a - Increase velocity");
+  glRasterPos2i(60,210);
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"z - Decrease velocity");
+
+  glRasterPos2i(60,180);
+  if(joyavailable)
+    printstring(GLUT_BITMAP_TIMES_ROMAN_24,"j - Toggle jostick control (Joystick control available)");
+  else
+    printstring(GLUT_BITMAP_TIMES_ROMAN_24,"(No Joystick control available)");
+}
+
+static void drawbase(void)
+{
+  static const GLfloat amb[4] = { 1, .5, 0.2, 1 };
+  static const GLfloat diff[4] = { 1, .4, 0.2, 1 };
+  int i,j;
+  float x,y,dx,dy;
+
+  glBindTexture(GL_TEXTURE_2D,t1id);
+
+  glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, amb);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diff);
+  dx=BASESIZE/BASERES;
+  dy=-BASESIZE/BASERES;
+  for(y=BASESIZE/2.0,j=0;j<BASERES;y+=dy,j++) {
+    glBegin(GL_QUAD_STRIP);
+    glColor3f(1.0,1.0,1.0);
+    glNormal3f(0.0,0.0,1.0);
+    for(x=-BASESIZE/2.0,i=0;i<BASERES;x+=dx,i++) {
+      glTexCoord2f(x,y);
+      glVertex3f(x,y,0.0);
+
+      glTexCoord2f(x,y+dy);
+      glVertex3f(x,y+dy,0.0);
+    }
+    glEnd();
+  }
+}
+
+static void drawteapot(void)
+{
+  static const GLfloat amb[4] = {  0.2, 0.2, 0.2, 1 };
+  static const GLfloat diff[4] = { 0.8, 0.3, 0.5, 1 };
+  static float xrot=0.0;
+  static float zrot=0.0;
+
+  glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, amb);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diff);
+
+  glPushMatrix();
+  glRotatef(lightalpha,0.0,0.0,1.0);
+  glMultMatrixf((GLfloat *)baseshadow);
+  glRotatef(-lightalpha,0.0,0.0,1.0);
+
+  glTranslatef(0.0,0.0,1.0);
+  glRotatef(xrot,1.0,0.0,0.0);
+  glRotatef(zrot,0.0,0.0,1.0);
+
+  glDisable(GL_TEXTURE_2D);
+  glDisable(GL_DEPTH_TEST);
+  glDisable(GL_LIGHTING);
+
+  glColor3f(0.0,0.0,0.0);
+  glCallList(teapotdlist);
+
+  glEnable(GL_DEPTH_TEST);
+  glEnable(GL_LIGHTING);
+  if(usetex)
+    glEnable(GL_TEXTURE_2D);
+
+  glPopMatrix();
+
+  glPushMatrix();
+  glTranslatef(0.0,0.0,1.0);
+  glRotatef(xrot,1.0,0.0,0.0);
+  glRotatef(zrot,0.0,0.0,1.0);
+
+  glCallList(teapotdlist);
+  glPopMatrix();
+
+  xrot+=2.0;
+  zrot+=1.0;
+}
+
+static void drawlight1(void)
+{
+  glPushMatrix();
+  glRotatef(lightalpha,0.0,0.0,1.0);
+  glLightfv(GL_LIGHT0,GL_POSITION,lightpos);
+  glLightfv(GL_LIGHT0,GL_SPOT_DIRECTION,lightdir);
+
+  glPopMatrix();
+}
+
+static void drawlight2(void)
+{
+  glPushMatrix();
+  glRotatef(lightalpha,0.0,0.0,1.0);
+  glTranslatef(lightpos[0],lightpos[1],lightpos[2]);
+
+  glDisable(GL_TEXTURE_2D);
+  glCallList(lightdlist);
+  if(usetex)
+    glEnable(GL_TEXTURE_2D);
+  
+  glPopMatrix();
+
+  lightalpha+=1.0;
+}
+
+static void dojoy(void)
+{
+#ifdef WIN32
+  static UINT max[2]={0,0};
+  static UINT min[2]={0xffffffff,0xffffffff},center[2];
+  MMRESULT res;
+  JOYINFO joy;
+
+  res=joyGetPos(JOYSTICKID1,&joy);
+
+  if(res==JOYERR_NOERROR) {
+    joyavailable=1;
+
+    if(max[0]<joy.wXpos)
+      max[0]=joy.wXpos;
+    if(min[0]>joy.wXpos)
+      min[0]=joy.wXpos;
+    center[0]=(max[0]+min[0])/2;
+
+    if(max[1]<joy.wYpos)
+      max[1]=joy.wYpos;
+    if(min[1]>joy.wYpos)
+      min[1]=joy.wYpos;
+    center[1]=(max[1]+min[1])/2;
+
+    if(joyactive) {
+      if(fabs(center[0]-(float)joy.wXpos)>0.1*(max[0]-min[0]))
+	alpha-=2.5*(center[0]-(float)joy.wXpos)/(max[0]-min[0]);
+      if(fabs(center[1]-(float)joy.wYpos)>0.1*(max[1]-min[1]))
+	beta+=2.5*(center[1]-(float)joy.wYpos)/(max[1]-min[1]);
+
+      if(joy.wButtons & JOY_BUTTON1)
+	v+=0.005;
+      if(joy.wButtons & JOY_BUTTON2)
+	v-=0.005;
+    }
+  } else
+    joyavailable=0;
+#endif
+}
+
+static void draw(void)
+{
+  static char frbuf[80] = "";
+
+  dojoy();
+
+  glEnable(GL_DEPTH_TEST);
+  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
+
+  if(usetex)
+    glEnable(GL_TEXTURE_2D);
+  else
+    glDisable(GL_TEXTURE_2D);
+
+  if(fog)
+    glEnable(GL_FOG);
+  else
+    glDisable(GL_FOG);
+
+  glEnable(GL_LIGHTING);
+
+  glShadeModel(GL_SMOOTH);
+
+  glPushMatrix();
+  calcposobs();
+
+  gluLookAt(obs[0],obs[1],obs[2],
+	    obs[0]+dir[0],obs[1]+dir[1],obs[2]+dir[2],
+	    0.0,0.0,1.0);
+
+  drawlight1();
+  glCallList(basedlist);
+  drawteapot();
+  drawlight2();
+  glPopMatrix();
+  
+  glDisable(GL_LIGHTING);
+  glDisable(GL_TEXTURE_2D);
+  glDisable(GL_DEPTH_TEST);
+  glDisable(GL_FOG);
+  glShadeModel(GL_FLAT);
+
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  glOrtho(-0.5,639.5,-0.5,479.5,-1.0,1.0);
+  glMatrixMode(GL_MODELVIEW);
+  glLoadIdentity();
+
+  glColor3f(1.0,0.0,0.0);
+  glRasterPos2i(10,10);
+  printstring(GLUT_BITMAP_HELVETICA_18,frbuf);
+  glRasterPos2i(350,470);
+  printstring(GLUT_BITMAP_HELVETICA_10,"Teapot V1.2 Written by David Bucciarelli (tech.hmw@plus.it)");
+
+  if(help)
+    printhelp();
+
+  reshape(WIDTH,HEIGHT);
+
+  glutSwapBuffers();
+
+   Frames++;
+
+   {
+      GLint t = glutGet(GLUT_ELAPSED_TIME);
+      if (t - T0 >= 2000) {
+         GLfloat seconds = (t - T0) / 1000.0;
+         GLfloat fps = Frames / seconds;
+         sprintf(frbuf, "Frame rate: %f", fps);
+         T0 = t;
+         Frames = 0;
+      }
+   }
+}
+
+static void inittextures(void)
+{
+  glGenTextures(1,&t1id);
+  glBindTexture(GL_TEXTURE_2D,t1id);
+
+  glPixelStorei(GL_UNPACK_ALIGNMENT,4);
+  if (!LoadRGBMipmaps("../images/tile.rgb", GL_RGB)) {
+    fprintf(stderr,"Error reading a texture.\n");
+    exit(-1);
+  }
+
+  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT);
+  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);
+  
+  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR);
+  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
+
+  glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_MODULATE);
+
+  glGenTextures(1,&t2id);
+  glBindTexture(GL_TEXTURE_2D,t2id);
+
+  glPixelTransferf(GL_RED_SCALE, 0.75);
+  glPixelTransferf(GL_RED_BIAS, 0.25);
+  glPixelTransferf(GL_GREEN_SCALE, 0.75);
+  glPixelTransferf(GL_GREEN_BIAS, 0.25);
+  glPixelTransferf(GL_BLUE_SCALE, 0.75);
+  glPixelTransferf(GL_BLUE_BIAS, 0.25);
+
+  if (!LoadRGBMipmaps("../images/bw.rgb", GL_RGB)) {
+    fprintf(stderr,"Error reading a texture.\n");
+    exit(-1);
+  }
+
+  glPixelTransferf(GL_RED_SCALE, 1.0);
+  glPixelTransferf(GL_RED_BIAS, 0.0);
+  glPixelTransferf(GL_GREEN_SCALE, 1.0);
+  glPixelTransferf(GL_GREEN_BIAS, 0.0);
+  glPixelTransferf(GL_BLUE_SCALE, 1.0);
+  glPixelTransferf(GL_BLUE_BIAS, 0.0);
+
+
+  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT);
+  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);
+  
+  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR);
+  glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
+
+  glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_MODULATE);
+}
+
+static void initlight(void)
+{
+  float matamb[4] ={0.5, 0.5, 0.5, 1.0};
+  float matdiff[4]={0.9, 0.2, 0.2, 1.0};
+  float matspec[4]={1.0,1.0,1.0,1.0};
+
+  float lamb[4] ={1.5, 1.5, 1.5, 1.0};
+  float ldiff[4]={1.0, 1.0, 1.0, 1.0};
+  float lspec[4]={1.0, 1.0, 1.0, 1.0};
+
+  glLightf(GL_LIGHT0,GL_SPOT_CUTOFF,70.0);
+  glLightf(GL_LIGHT0,GL_SPOT_EXPONENT,20.0);
+  glLightfv(GL_LIGHT0,GL_AMBIENT,lamb);
+  glLightfv(GL_LIGHT0,GL_DIFFUSE,ldiff);
+  glLightfv(GL_LIGHT0,GL_SPECULAR,lspec);
+
+  glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 15.0);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, matdiff);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, matspec);
+  glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, matamb);
+
+  glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lamb);
+  glEnable(GL_LIGHT0);
+}
+
+static void initdlists(void)
+{
+  GLUquadricObj *lcone,*lbase;
+  GLfloat plane[4];
+  GLfloat v0[3]={0.0,0.0,0.0};
+  GLfloat v1[3]={1.0,0.0,0.0};
+  GLfloat v2[3]={0.0,1.0,0.0};
+
+  findplane(plane,v0,v1,v2);
+  shadowmatrix(baseshadow,plane,lightpos);
+
+  teapotdlist=glGenLists(1);
+  glNewList(teapotdlist,GL_COMPILE);
+  glRotatef(90.0,1.0,0.0,0.0);
+  glCullFace(GL_FRONT);
+  glBindTexture(GL_TEXTURE_2D,t2id);
+  glutSolidTeapot(0.75);
+  glCullFace(GL_BACK);
+  glEndList();
+
+  basedlist=glGenLists(1);
+  glNewList(basedlist,GL_COMPILE);
+  drawbase();
+  glEndList();
+
+  lightdlist=glGenLists(1);
+  glNewList(lightdlist,GL_COMPILE);
+  glDisable(GL_LIGHTING);
+ 
+  lcone=gluNewQuadric();
+  lbase=gluNewQuadric();
+  glRotatef(45.0,0.0,1.0,0.0);
+
+  glColor3f(1.0,1.0,1.0);
+  glCullFace(GL_FRONT);
+  gluDisk(lbase,0.0,0.2,12.0,1.0);
+  glCullFace(GL_BACK);
+
+  glColor3f(0.5,0.0,0.0);
+  gluCylinder(lcone,0.2,0.0,0.5,12,1);
+
+  gluDeleteQuadric(lcone);
+  gluDeleteQuadric(lbase);
+
+  glEnable(GL_LIGHTING);
+  glEndList();
+}
+
+int main(int ac, char **av)
+{
+  float fogcolor[4]={0.025,0.025,0.025,1.0};
+
+  fprintf(stderr,"Teapot V1.2\nWritten by David Bucciarelli (tech.hmw@plus.it)\n");
+
+  /*
+    if(!SetPriorityClass(GetCurrentProcess(),REALTIME_PRIORITY_CLASS)) {
+    fprintf(stderr,"Error setting the process class.\n");
+    return 0;
+    }
+
+    if(!SetThreadPriority(GetCurrentThread(),THREAD_PRIORITY_TIME_CRITICAL)) {
+    fprintf(stderr,"Error setting the process priority.\n");
+    return 0;
+    }
+    */
+
+  glutInitWindowPosition(0,0);
+  glutInitWindowSize(WIDTH,HEIGHT);
+  glutInit(&ac,av);
+
+  glutInitDisplayMode(GLUT_RGB|GLUT_DEPTH|GLUT_DOUBLE);
+
+  if(!(win=glutCreateWindow("Teapot"))) {
+    fprintf(stderr,"Error, couldn't open window\n");
+	return -1;
+  }
+
+  reshape(WIDTH,HEIGHT);
+
+  glShadeModel(GL_SMOOTH);
+  glEnable(GL_DEPTH_TEST);
+  glEnable(GL_CULL_FACE);
+  glEnable(GL_TEXTURE_2D);
+
+  glEnable(GL_FOG);
+  glFogi(GL_FOG_MODE,GL_EXP2);
+  glFogfv(GL_FOG_COLOR,fogcolor);
+
+  glFogf(GL_FOG_DENSITY,0.04);
+  glHint(GL_FOG_HINT,GL_NICEST);
+  glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
+
+  calcposobs();
+
+  inittextures();
+  initlight();
+
+  initdlists();
+
+  glClearColor(fogcolor[0],fogcolor[1],fogcolor[2],fogcolor[3]);
+
+  glutReshapeFunc(reshape);
+  glutDisplayFunc(draw);
+  glutKeyboardFunc(key);
+  glutSpecialFunc(special);
+  glutIdleFunc(draw);
+
+  glutMainLoop();
+
+  return 0;
+}
diff --git a/progs/demos/terrain.c b/progs/demos/terrain.c
new file mode 100644
index 000000000..be78ea495
--- /dev/null
+++ b/progs/demos/terrain.c
@@ -0,0 +1,656 @@
+/*
+ * This program is under the GNU GPL.
+ * Use at your own risk.
+ *
+ * written by David Bucciarelli (tech.hmw@plus.it)
+ *            Humanware s.r.l.
+ *
+ * based on a Mikael SkiZoWalker's (MoDEL) / France (Skizo@Hol.Fr) demo
+ */
+
+#include <stdio.h>
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#ifdef WIN32
+#include <windows.h>
+#endif
+
+#include <GL/glut.h>
+
+#ifdef XMESA
+#include "GL/xmesa.h"
+static int fullscreen = 1;
+#endif
+
+#ifndef M_PI
+#define M_PI 3.14159265
+#endif
+
+#define heightMnt	450
+#define	lenghtXmnt	62
+#define lenghtYmnt	62
+
+#define stepXmnt     96.0
+#define stepYmnt     96.0
+
+#define WIDTH 640
+#define HEIGHT 480
+
+static GLint T0 = 0;
+static GLint Frames = 0;
+
+#define TSCALE 4
+
+#define FOV 85
+
+static GLfloat terrain[256 * 256];
+static GLfloat terraincolor[256 * 256][3];
+
+static int win = 0;
+
+static int fog = 1;
+static int bfcull = 1;
+static int usetex = 1;
+static int poutline = 0;
+static int help = 1;
+static int joyavailable = 0;
+static int joyactive = 0;
+static float ModZMnt;
+static long GlobalMnt = 0;
+
+static int scrwidth = WIDTH;
+static int scrheight = HEIGHT;
+
+#define OBSSTARTX 992.0
+#define OBSSTARTY 103.0
+
+static float obs[3] = { OBSSTARTX, heightMnt * 1.3, OBSSTARTY };
+static float dir[3], v1[2], v2[2];
+static float v = 900.0;
+static float alpha = 75.0;
+static float beta = 90.0;
+
+static void
+calcposobs(void)
+{
+   float alpha1, alpha2;
+   static double t0 = -1.;
+   double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+
+   dir[0] = sin(alpha * M_PI / 180.0);
+   dir[2] = cos(alpha * M_PI / 180.0) * sin(beta * M_PI / 180.0);
+   dir[1] = cos(beta * M_PI / 180.0);
+
+   if (dir[0] < 1.0e-5 && dir[0] > -1.0e-5)
+      dir[0] = 0;
+   if (dir[1] < 1.0e-5 && dir[1] > -1.0e-5)
+      dir[1] = 0;
+   if (dir[2] < 1.0e-5 && dir[2] > -1.0e-5)
+      dir[2] = 0;
+
+   alpha1 = alpha + FOV / 2.0;
+   v1[0] = sin(alpha1 * M_PI / 180.0);
+   v1[1] = cos(alpha1 * M_PI / 180.0);
+
+   alpha2 = alpha - FOV / 2.0;
+   v2[0] = sin(alpha2 * M_PI / 180.0);
+   v2[1] = cos(alpha2 * M_PI / 180.0);
+
+   obs[0] += v * dir[0] * dt;
+   obs[1] += v * dir[1] * dt;
+   obs[2] += v * dir[2] * dt;
+
+   if (obs[1] < 0.0)
+      obs[1] = 0.0;
+}
+
+static void
+reshape(int width, int height)
+{
+   scrwidth = width;
+   scrheight = height;
+   glViewport(0, 0, (GLint) width, (GLint) height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluPerspective(50.0, ((GLfloat) width / (GLfloat) height),
+		  lenghtXmnt * stepYmnt * 0.01, lenghtXmnt * stepYmnt * 0.7);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+}
+
+static int
+clipstrip(float y, float *start, float *end)
+{
+   float x1, x2, t1, t2, tmp;
+
+   if (v1[1] == 0.0) {
+      t1 = 0.0;
+      x1 = -HUGE_VAL;
+   }
+   else {
+      t1 = y / v1[1];
+      x1 = t1 * v1[0];
+   }
+
+   if (v2[1] == 0.0) {
+      t2 = 0.0;
+      x2 = HUGE_VAL;
+   }
+   else {
+      t2 = y / v2[1];
+      x2 = t2 * v2[0];
+   }
+
+   if (((x1 < -(lenghtXmnt * stepXmnt) / 2) && (t2 <= 0.0)) ||
+       ((t1 <= 0.0) && (x2 > (lenghtXmnt * stepXmnt) / 2)) ||
+       ((t1 < 0.0) && (t2 < 0.0)))
+      return 0;
+
+   if ((t1 == 0.0) && (t2 == 0.0)) {
+      if ((v1[0] < 0.0) && (v1[1] > 0.0) && (v2[0] < 0.0) && (v2[1] < 0.0)) {
+	 *start = -(lenghtXmnt * stepXmnt) / 2;
+	 *end = stepXmnt;
+	 return 1;
+      }
+      else {
+	 if ((v1[0] > 0.0) && (v1[1] < 0.0) && (v2[0] > 0.0) && (v2[1] > 0.0)) {
+	    *start = -stepXmnt;
+	    *end = (lenghtXmnt * stepXmnt) / 2;
+	    return 1;
+	 }
+	 else
+	    return 0;
+      }
+   }
+   else {
+      if (t2 < 0.0) {
+	 if (x1 < 0.0)
+	    x2 = -(lenghtXmnt * stepXmnt) / 2;
+	 else
+	    x2 = (lenghtXmnt * stepXmnt) / 2;
+      }
+
+      if (t1 < 0.0) {
+	 if (x2 < 0.0)
+	    x1 = -(lenghtXmnt * stepXmnt) / 2;
+	 else
+	    x1 = (lenghtXmnt * stepXmnt) / 2;
+      }
+   }
+
+   if (x1 > x2) {
+      tmp = x1;
+      x1 = x2;
+      x2 = tmp;
+   }
+
+   x1 -= stepXmnt;
+   if (x1 < -(lenghtXmnt * stepXmnt) / 2)
+      x1 = -(lenghtXmnt * stepXmnt) / 2;
+
+   x2 += stepXmnt;
+   if (x2 > (lenghtXmnt * stepXmnt) / 2)
+      x2 = (lenghtXmnt * stepXmnt) / 2;
+
+   *start = ((int) (x1 / stepXmnt)) * stepXmnt;
+   *end = ((int) (x2 / stepXmnt)) * stepXmnt;
+
+   return 1;
+}
+
+static void
+printstring(void *font, char *string)
+{
+   int len, i;
+
+   len = (int) strlen(string);
+   for (i = 0; i < len; i++)
+      glutBitmapCharacter(font, string[i]);
+}
+
+static void
+printhelp(void)
+{
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+   glColor4f(0.0, 0.0, 0.0, 0.5);
+   glRecti(40, 40, 600, 440);
+   glDisable(GL_BLEND);
+
+   glColor3f(1.0, 0.0, 0.0);
+   glRasterPos2i(300, 420);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Help");
+
+   glRasterPos2i(60, 390);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Toggle Help");
+   glRasterPos2i(60, 360);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Toggle Textures");
+   glRasterPos2i(60, 330);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog");
+   glRasterPos2i(60, 300);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "p - Wire frame");
+   glRasterPos2i(60, 270);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Toggle Back face culling");
+   glRasterPos2i(60, 240);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate");
+   glRasterPos2i(60, 210);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "a - Increase velocity");
+   glRasterPos2i(60, 180);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "z - Decrease velocity");
+
+   glRasterPos2i(60, 150);
+   if (joyavailable)
+      printstring(GLUT_BITMAP_TIMES_ROMAN_24,
+		  "j - Toggle jostick control (Joystick control available)");
+   else
+      printstring(GLUT_BITMAP_TIMES_ROMAN_24,
+		  "(No Joystick control available)");
+}
+
+static void
+drawterrain(void)
+{
+   int h, i, idx, ox, oy;
+   float j, k, start, end;
+
+   ox = (int) (obs[0] / stepXmnt);
+   oy = (int) (obs[2] / stepYmnt);
+   GlobalMnt = ((ox * TSCALE) & 255) + ((oy * TSCALE) & 255) * 256;
+
+   glPushMatrix();
+   glTranslatef((float) ox * stepXmnt, 0, (float) oy * stepYmnt);
+
+   for (h = 0, k = -(lenghtYmnt * stepYmnt) / 2; h < lenghtYmnt;
+	k += stepYmnt, h++) {
+      if (!clipstrip(k, &start, &end))
+	 continue;
+
+      glBegin(GL_TRIANGLE_STRIP);	/* I hope that the optimizer will be able to improve this code */
+      for (i = (int) (lenghtXmnt / 2 + start / stepXmnt), j = start; j <= end;
+	   j += stepXmnt, i++) {
+	 idx = (i * TSCALE + h * 256 * TSCALE + GlobalMnt) & 65535;
+	 glColor3fv(terraincolor[idx]);
+	 glTexCoord2f((ox + i) / 8.0, (oy + h) / 8.0);
+	 glVertex3f(j, terrain[idx], k);
+
+	 idx =
+	    (i * TSCALE + h * 256 * TSCALE + 256 * TSCALE +
+	     GlobalMnt) & 65535;
+	 glColor3fv(terraincolor[idx]);
+	 glTexCoord2f((ox + i) / 8.0, (oy + h + 1) / 8.0);
+	 glVertex3f(j, terrain[idx], k + stepYmnt);
+      }
+      glEnd();
+   }
+
+   glDisable(GL_CULL_FACE);
+   glDisable(GL_TEXTURE_2D);
+   glEnable(GL_BLEND);
+   glBegin(GL_QUADS);
+   glColor4f(0.1, 0.7, 1.0, 0.4);
+   glVertex3f(-(lenghtXmnt * stepXmnt) / 2.0, heightMnt * 0.6,
+	      -(lenghtYmnt * stepYmnt) / 2.0);
+   glVertex3f(-(lenghtXmnt * stepXmnt) / 2.0, heightMnt * 0.6,
+	      (lenghtYmnt * stepYmnt) / 2.0);
+   glVertex3f((lenghtXmnt * stepXmnt) / 2.0, heightMnt * 0.6,
+	      (lenghtYmnt * stepYmnt) / 2.0);
+   glVertex3f((lenghtXmnt * stepXmnt) / 2.0, heightMnt * 0.6,
+	      -(lenghtYmnt * stepYmnt) / 2.0);
+   glEnd();
+   glDisable(GL_BLEND);
+   if (bfcull)
+      glEnable(GL_CULL_FACE);
+   glEnable(GL_TEXTURE_2D);
+
+   glPopMatrix();
+
+}
+
+static void
+dojoy(void)
+{
+#ifdef WIN32
+   static UINT max[2] = { 0, 0 };
+   static UINT min[2] = { 0xffffffff, 0xffffffff }, center[2];
+   MMRESULT res;
+   JOYINFO joy;
+
+   res = joyGetPos(JOYSTICKID1, &joy);
+
+   if (res == JOYERR_NOERROR) {
+      joyavailable = 1;
+
+      if (max[0] < joy.wXpos)
+	 max[0] = joy.wXpos;
+      if (min[0] > joy.wXpos)
+	 min[0] = joy.wXpos;
+      center[0] = (max[0] + min[0]) / 2;
+
+      if (max[1] < joy.wYpos)
+	 max[1] = joy.wYpos;
+      if (min[1] > joy.wYpos)
+	 min[1] = joy.wYpos;
+      center[1] = (max[1] + min[1]) / 2;
+
+      if (joyactive) {
+	 if (fabs(center[0] - (float) joy.wXpos) > 0.1 * (max[0] - min[0]))
+	    alpha +=
+	       2.5 * (center[0] - (float) joy.wXpos) / (max[0] - min[0]);
+	 if (fabs(center[1] - (float) joy.wYpos) > 0.1 * (max[1] - min[1]))
+	    beta += 2.5 * (center[1] - (float) joy.wYpos) / (max[1] - min[1]);
+
+	 if (joy.wButtons & JOY_BUTTON1)
+	    v += 0.5;
+	 if (joy.wButtons & JOY_BUTTON2)
+	    v -= 0.5;
+      }
+   }
+   else
+      joyavailable = 0;
+#endif
+}
+
+static void
+drawscene(void)
+{
+   static char frbuf[80] = "";
+
+   dojoy();
+
+   glShadeModel(GL_SMOOTH);
+   glEnable(GL_DEPTH_TEST);
+
+   if (usetex)
+      glEnable(GL_TEXTURE_2D);
+   else
+      glDisable(GL_TEXTURE_2D);
+
+   if (fog)
+      glEnable(GL_FOG);
+   else
+      glDisable(GL_FOG);
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glPushMatrix();
+
+   calcposobs();
+   gluLookAt(obs[0], obs[1], obs[2],
+	     obs[0] + dir[0], obs[1] + dir[1], obs[2] + dir[2],
+	     0.0, 1.0, 0.0);
+
+   drawterrain();
+   glPopMatrix();
+
+   glDisable(GL_TEXTURE_2D);
+   glDisable(GL_DEPTH_TEST);
+   glDisable(GL_FOG);
+   glShadeModel(GL_FLAT);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-0.5, 639.5, -0.5, 479.5, -1.0, 1.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+
+   glColor3f(1.0, 0.0, 0.0);
+   glRasterPos2i(10, 10);
+   printstring(GLUT_BITMAP_HELVETICA_18, frbuf);
+   glRasterPos2i(350, 470);
+   printstring(GLUT_BITMAP_HELVETICA_10,
+	       "Terrain V1.2 Written by David Bucciarelli (tech.hmw@plus.it)");
+   glRasterPos2i(434, 457);
+   printstring(GLUT_BITMAP_HELVETICA_10,
+	       "Based on a Mickael's demo (Skizo@Hol.Fr)");
+
+   if (help)
+      printhelp();
+
+   reshape(scrwidth, scrheight);
+
+   glutSwapBuffers();
+
+   Frames++;
+   {
+      GLint t = glutGet(GLUT_ELAPSED_TIME);
+      if (t - T0 >= 2000) {
+         GLfloat seconds = (t - T0) / 1000.0;
+         GLfloat fps = Frames / seconds;
+         sprintf(frbuf, "Frame rate: %f", fps);
+         T0 = t;
+         Frames = 0;
+      }
+   }
+}
+
+static void
+key(unsigned char k, int x, int y)
+{
+   switch (k) {
+   case 27:
+      exit(0);
+      break;
+   case 'a':
+      v += 50.;
+      break;
+   case 'z':
+      v -= 50.;
+      break;
+   case 'p':
+      if (poutline) {
+	 glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+	 poutline = 0;
+      }
+      else {
+	 glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+	 poutline = 1;
+      }
+      break;
+   case 'j':
+      joyactive = (!joyactive);
+      break;
+   case 'h':
+      help = (!help);
+      break;
+   case 'f':
+      fog = (!fog);
+      break;
+   case 't':
+      usetex = (!usetex);
+      break;
+   case 'b':
+      if (bfcull) {
+	 glDisable(GL_CULL_FACE);
+	 bfcull = 0;
+      }
+      else {
+	 glEnable(GL_CULL_FACE);
+	 bfcull = 1;
+      }
+      break;
+#ifdef XMESA
+   case ' ':
+      XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
+      fullscreen = (!fullscreen);
+      break;
+#endif
+   }
+}
+
+static void
+special(int k, int x, int y)
+{
+   switch (k) {
+   case GLUT_KEY_LEFT:
+      alpha += 2.0;
+      break;
+   case GLUT_KEY_RIGHT:
+      alpha -= 2.0;
+      break;
+   case GLUT_KEY_DOWN:
+      beta -= 2.0;
+      break;
+   case GLUT_KEY_UP:
+      beta += 2.0;
+      break;
+   }
+}
+
+static void
+calccolor(GLfloat height, GLfloat c[3])
+{
+   GLfloat color[4][3] = {
+      {1.0, 1.0, 1.0},
+      {0.0, 0.8, 0.0},
+      {1.0, 1.0, 0.3},
+      {0.0, 0.0, 0.8}
+   };
+   GLfloat fact;
+
+   height = height * (1.0 / 255.0);
+
+   if (height >= 0.9) {
+      c[0] = color[0][0];
+      c[1] = color[0][1];
+      c[2] = color[0][2];
+      return;
+   }
+
+   if ((height < 0.9) && (height >= 0.7)) {
+      fact = (height - 0.7) * 5.0;
+      c[0] = fact * color[0][0] + (1.0 - fact) * color[1][0];
+      c[1] = fact * color[0][1] + (1.0 - fact) * color[1][1];
+      c[2] = fact * color[0][2] + (1.0 - fact) * color[1][2];
+      return;
+   }
+
+   if ((height < 0.7) && (height >= 0.6)) {
+      fact = (height - 0.6) * 10.0;
+      c[0] = fact * color[1][0] + (1.0 - fact) * color[2][0];
+      c[1] = fact * color[1][1] + (1.0 - fact) * color[2][1];
+      c[2] = fact * color[1][2] + (1.0 - fact) * color[2][2];
+      return;
+   }
+
+   if ((height < 0.6) && (height >= 0.5)) {
+      fact = (height - 0.5) * 10.0;
+      c[0] = fact * color[2][0] + (1.0 - fact) * color[3][0];
+      c[1] = fact * color[2][1] + (1.0 - fact) * color[3][1];
+      c[2] = fact * color[2][2] + (1.0 - fact) * color[3][2];
+      return;
+   }
+
+   c[0] = color[3][0];
+   c[1] = color[3][1];
+   c[2] = color[3][2];
+}
+
+static void
+loadpic(void)
+{
+   GLubyte bufferter[256 * 256], terrainpic[256 * 256];
+   FILE *FilePic;
+   int i, tmp;
+   GLenum gluerr;
+
+   if ((FilePic = fopen("terrain.dat", "r")) == NULL) {
+      fprintf(stderr, "Error loading terrain.dat\n");
+      exit(-1);
+   }
+   fread(bufferter, 256 * 256, 1, FilePic);
+   fclose(FilePic);
+
+   for (i = 0; i < (256 * 256); i++) {
+      terrain[i] = (bufferter[i] * (heightMnt / 255.0f));
+      calccolor((GLfloat) bufferter[i], terraincolor[i]);
+      tmp = (((int) bufferter[i]) + 96);
+      terrainpic[i] = (tmp > 255) ? 255 : tmp;
+   }
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   if ((gluerr = gluBuild2DMipmaps(GL_TEXTURE_2D, 1, 256, 256, GL_LUMINANCE,
+				   GL_UNSIGNED_BYTE,
+				   (GLvoid *) (&terrainpic[0])))) {
+      fprintf(stderr, "GLULib%s\n", (char *) gluErrorString(gluerr));
+      exit(-1);
+   }
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+		   GL_LINEAR_MIPMAP_LINEAR);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+   glEnable(GL_TEXTURE_2D);
+}
+
+static void
+init(void)
+{
+   float fogcolor[4] = { 0.6, 0.7, 0.7, 1.0 };
+
+   glClearColor(fogcolor[0], fogcolor[1], fogcolor[2], fogcolor[3]);
+   glClearDepth(1.0);
+   glDepthFunc(GL_LEQUAL);
+   glShadeModel(GL_SMOOTH);
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_CULL_FACE);
+
+   glDisable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+   glEnable(GL_FOG);
+   glFogi(GL_FOG_MODE, GL_EXP2);
+   glFogfv(GL_FOG_COLOR, fogcolor);
+   glFogf(GL_FOG_DENSITY, 0.0007);
+#ifdef FX
+   glHint(GL_FOG_HINT, GL_NICEST);
+#endif
+
+   reshape(scrwidth, scrheight);
+}
+
+
+int
+main(int ac, char **av)
+{
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(WIDTH, HEIGHT);
+   glutInit(&ac, av);
+
+   glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
+
+   if (!(win = glutCreateWindow("Terrain"))) {
+      fprintf(stderr, "Error, couldn't open window\n");
+      return -1;
+   }
+
+   ModZMnt = 0.0f;
+   loadpic();
+
+   init();
+
+#ifndef FX
+   glDisable(GL_TEXTURE_2D);
+   usetex = 0;
+#endif
+
+   glutReshapeFunc(reshape);
+   glutDisplayFunc(drawscene);
+   glutKeyboardFunc(key);
+   glutSpecialFunc(special);
+   glutIdleFunc(drawscene);
+
+   glutMainLoop();
+
+   return 0;
+}
diff --git a/progs/demos/terrain.dat b/progs/demos/terrain.dat
new file mode 100644
index 000000000..2af385e9c
--- /dev/null
+++ b/progs/demos/terrain.dat
@@ -0,0 +1 @@
+‚ƒƒ…†„ƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†‡‰‹��“•––•––––—˜š›œœš–“‘�Ž�Œ‹‹‹‹‹Œ‹‹���ŽŒŒŒ‹‰†……„ƒ‚ƒ‚‚ƒ…ˆŠ‹‹ˆ…ƒ‚ƒ„…†‡‡†…ƒƒ„„…‡ˆ‰ŠŽ�“““’’•˜š›™–•””•˜™—“�ŽŽŽŽ��‹‰†ƒ‚‚‚‚ƒ…‡…„ƒƒƒƒ‚ƒ‚‚‚ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„…†‰Œ�Ž�“•––••–—˜˜˜™œ��™•“‘�Œ‰ˆˆˆˆˆˆˆ‡‡‰‹‹ŠŠŠ‰ˆ‡†††„ƒ„…ƒƒƒ„†ˆŠ‹ˆ…‚‚ƒ…†‡‡††††ˆ‰ˆˆˆˆˆŠ��ŽŽŽŽ‘”—›�š˜———˜š›—”‘������‹ˆ†ƒ‚‚‚‚‚„†„„ƒ‚ƒ„†‡…„„…ƒ‚ƒ„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…†ˆŒ��‘’”•––•••—˜™™›œœœ˜–•’Ž‰‡†…„„††…„„…††ˆˆ‡††……†…„„‡ˆ‡††…†ˆ‹Œ‰†ƒ‚ƒ†ˆ‰‰ˆˆˆŒ���ŒŠ‰ˆŠ‹Š‰ˆŠŒ�’–›�œ›š›››œœ˜•’‘’’’‘Ž‹ˆ…‚‚‚‚‚‚„…ƒ‚‚‚ƒ…ˆŠˆˆˆ‡…„…‡…‚‚‚‚‚‚‚ƒƒƒ„„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‡‰Š�Ž‘”••–—•”‘‘“•™œœœ�œš˜•’�‰†„ƒ‚ƒƒƒƒ‚‚‚‚ƒ„ƒƒƒ„„„…†‡ˆŠŒ‹Šˆ††ˆŠŒ‹‰…ƒ„…ˆŒ‹‹ŒŽ�‘’“�Ž‹Š‰ˆ‡††ˆ‹�”˜›�ž�œ���œ›—•’‘�‘““�Œˆ„‚‚‚‚‚‚„…‚‚‚‚ƒ†ŠŒ‹‹Šˆ‡†ˆˆ…‚‚‚‚‚‚ƒ…†‡ˆ‡…ƒƒ‚‚ƒƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…†‰‹�Ž‘•————–”’��‘“—›œœœœ›˜•‘Œ‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ………‡‰Š�ŽŽŽŒŠ‰ˆ‰‹Ž�‰…„„†ŠŒŒ��’“”•–”��‹ˆ††……ˆŒ�”˜›žžž���œ›š—•’��‘“”�Œˆ„‚‚‚‚‚„……ƒ‚ƒƒ„†‰Œ��ŒŠˆ‰‰ˆ…ƒ‚‚‚‚‚„‡ˆˆˆ‡‡‡‡……†‡‡†…„ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‚‚‚‚‚ƒ‚‚ƒ†ˆŠŠ‹Ž’•——–••’�ŽŽ�‘”—˜š›š˜–“‘�Š†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…†‡ˆ‰ŠŒ���ŽŒ‹‹ŠŠ‹�‹‡„‚„‡ŠŒ��’”“”—™–“�ŒŠˆ‡†‡‰Œ�“–™œ››››™˜™™—•‘��‘“”’Ž‰…ƒ‚‚‚ƒ„…………††‡ˆŠŒŽ�Ž�‹Š‰ˆ…ƒ‚‚‚‚„†ˆˆˆˆ‰‹Œ�‹‰‹�Œ‹‰ˆ†„ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…„„ƒƒ…†„„…ˆ‰‹‹Œ�“–—–•”“‘�ŽŽ�‘’”—š›š˜–”’�‹‡„ƒ‚‚‚‚‚‚‚‚‚‚‚ƒ…†‡ˆ‰‹ŒŽ�‘‘�Œ‹‹Š‹Œ�Š‡…„…‡‰‹Ž‘”•”–š›˜•‘ŽŒŠˆ‡‰‹��“–™›š™˜˜––—˜–“�Ž��“”‘�‰†„ƒ‚‚‚ƒ„†‡ˆ‡ˆŠ‹�����‘Ž�Šˆ…ƒƒ„„…‡ˆˆˆ‰ŠŒ�‘’���‘�ŽŒŠ‡††…ƒ‚‚‚‚‚‚ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ„…†‡‰‡‡ˆˆ‡†‡ˆ‰Š‹�‘”–—–•’�����‘’’’”—™š™—”’Ž‹‰‡…ƒ‚‚‚‚‚‚‚‚‚„…†‡ˆˆ‰‹Œ�’••’ŽŒŒŒŒŒŠ‰ˆˆ‡‡ˆ‰‹�’•––˜šœš—’�ŒŠ‡†ˆ‹Ž‘”˜šœ›š—•••–•“‘Ž���’“�‹‰‡…„‚‚‚‚„†‡‡‡‰‹Œ�‘‘‘““‘�Œ‰ˆ‡†‡ˆˆŠŠŠŠ‹�Ž‘“”““““‘�Ž‹‰‰‰ˆ…ƒ‚‚‚‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„†……†Š‹Š‰‰‰ˆ‡ˆˆˆ‰Œ�’”–—–“�Ž����‘’’‘“•˜›š—”’Ž‹‰‡†„‚‚‚‚‚‚‚‚„†‡‡ˆ‰Š‰Š�‘”˜™•‘�ŽŽ�‹Š‹Œ‹‹Š‰ŠŒ�’•–—™›œš–’��Œ‰†ˆŒ�’•˜šœ›™–””““”’�Ž���’’Ž‹‰‡…„‚‚‚‚‚‚ƒ„†Š‹Œ�‘‘’’‘�‘�Ž�‹ˆˆˆŠ‹ŒŒ���Ž�‘“““’�Ž�‹Š‹Œ‹‰‡……†„ƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ…‡Š‹Š‰‡‡†‡‡‡ˆ‹Ž��‘’”“’�Ž���ŽŽ��‘’”•—•“’�‹‰‡‡…ƒ‚‚‚‚‚‚‚ƒ…‡‡‡‡ŠŠ‰ŠŒ�•™š—”’�Ž�‹‹���ŒŠŠŒ���’”–—˜—•“��Ž�‰‡Š�Ž�‘”–˜™˜–”“‘’“�ŽŒŒ���Ž‹‰†…ƒ‚‚‚‚‚‚‚‚ƒ†Š‹‹Ž‘’’‘��’’’��ŠŠ‹���ŽŽ�Ž���’‘‘‘���ŒŒŽ�ŒŒ‹Š‹‹‡„„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„†‰Š‰ˆ†††‡‡‡ŠŽ‘‘��‘’’‘‘�����Œ��‘“””•“‘��Œ‰‡†ƒ‚‚‚‚‚‚‚ƒ„‡‰‡†‰‹‹ŠŠ‹�–›�š˜–“‘�Ž��ŽŽŽŒŒŽ���’“”–•“‘�����ŒŠ‹��Ž�“•———–”’‘““�Ž��Ž��ŒŠ‡…„‚‚‚‚‚‚‚‚‚ƒˆ‹‹��‘‘‘��‘’’“‘Ž��ŽŽŽ����‘��‘‘���‘��ŽŽŽŽ���Ž�ŽŠ‡„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†‡‡‡‡‡ˆ‰‰‰Œ�‘’‘��‘‘’’’‘�Ž��Ž‘”•–•”“’‘��‹ˆ…ƒ‚‚‚‚ƒƒ„…‡‰‰‡ˆŠŠŠŠŠ�’˜ž ž�š˜–•””’��Ž���’’’‘‘’“’���‘’“’Ž�ŽŽŽŽ�’”–––•”’’““�ŽŒŒ��ŒŠ‰‡…ƒ‚‚‚‚‚‚‚‚ƒ†Š�ŽŽŽ������’“”’��‘‘����‘’“‘�‘����‘������‘“’‘��Œ‡ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚…†‡‡ˆˆ‰‹‹ŒŽ��’‘�Ž��‘’’‘�ŽŽŽ�“•–——–•”’‘ŽŒˆ„‚‚‚‚‚ƒ„†‡ˆˆˆˆˆŠ‹ŠŠŒŽ’˜ž¢¡ �ššš™˜•’‘���“•””’‘‘‘��Ž�‘’’’‘������‘”–—–––•“’‘ŽŒŒŒŒ‹‰‡†…„‚‚‚‚‚‚‚‚‚„ˆ‹��ŽŽŽ��ŽŽ��‘’‘‘���ŽŽŽŽ�‘”’‘�������‘����““‘��Ž‹†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„†‡…„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„††††‡ˆŠ‹‹‹Œ�Ž�ŒŒ���Ž����‘‘“–˜˜˜˜™—•“��Š‡„ƒ‚ƒ„ƒ„………‡ˆ‰ˆˆŠŒ‹Œ�Ž“˜�  Ÿœššœœ›˜––•““•––•““‘����Ž�ŒŒŽ��ŽŽ��‘’”––—™™–”“’�Ž�ŒŠˆ„ƒƒ„ƒ‚‚‚‚‚‚‚‚ƒ…‰Œ���ŽŽ����ŽŽ�’’��Ž�����Ž’•“‘���‘����ŽŽ�‘“”“���Š†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ…‡‰‹Œ‹‰‡…ƒ‚ƒ„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ………„…†ˆŠ‹‹‹‹ŠŠ‹ŒŒ‹‹Œ���‘“•–™›››œ›—•“‘�‰†…„ƒ………„„„…†‡‰‰ˆ‹��ŽŽ�”˜œŸŸŸœšœžŸ �››š™˜™š™—–”’��ŒŒŒ‹‰‰Œ�����“””•——™››˜—–•“��Œ‰†ƒ‚‚‚‚‚‚‚‚‚‚‚‚ƒ†ŠŒŽ�ŽŒ‹Œ����‘‘��ŽŽ�Ž�ŒŒŒ�‘”‘��ŽŽŽ��Œ‹‹��‘“–”’��Š†„ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„„…‡‰Š�ŽŽŽ�ŒŠ‡†‡ˆ††…„ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚„…‡Š‹ŒŒ‹Š‰‰‰‰‰‰‹Ž�‘“—™šœŸŸŸŸœ˜•”’�‰†………†‡‡…ƒ„†ˆ‰ŠŠŒŽ�Ž���’•™�����žŸ¡£¡ ŸŸ�œ��›™˜—“�ŒŠŠŠˆˆŠŒ���‘“––—˜šš›œ�›™˜˜•“‘�‰„‚‚‚‚‚‚‚‚‚‚‚‚‚„‡ŠŒŽŽŽŒ‹‹��’““‘��Ž��ŽŽŒ‹ŒŽ’”“��Ž����‹Š‹��‘”––“��Šˆ†„„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‡ˆ‰‹����’‘�Ž�Š‰Š‰ŠŠ‰ˆ†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„†ˆ‹‹‹Š‰‡†‡‰‰Š‹��’–šœ�Ÿ ¡¡Ÿœ˜–•’�Š‡…†ˆ‰Š‰‡††‡‰‹��Ž�‘���‘“•™œœ�žžŸ £¤¤¥¤£¡  Ÿ�››™”�ŒŠ‰‰ˆ‰Œ�‘’’“–™™š››œ����œœ›˜•“�Š†ƒ‚‚‚‚‚‚‚‚‚‚‚„†‰Œ�����Ž�‘’””•’��Ž�����‹Œ�”—–“��Ž���Ž���’“”•”“�Ž‹Šˆ†„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†‡Š‹�Ž�‘’““��‹‹‰‰‡†††††„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‡ˆ‰ˆ‡††‡‰ŠŒ��’•˜š›�ž��œš˜–•“��Œ‡…†‰ŠŠ‰‰‰‰ŠŒŽŽŽ�’“““““”—š›œ��žžŸ¢¢£¥¤£¢¢¢¢¡¡ž›•‘Ž‹ŒŽŽ�’•––•–™››œœ›œžžžžž�œ—”‘Ž‹‡ƒ‚‚‚‚‚‚‚‚‚‚ƒ†‰‹��ŽŽ�Ž�‘“••—˜•’�Ž��Ž��Œ��”˜—•’��‘‘‘’““••••”““’�ŒŒ‹‰‡…‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„…‡‰Š�ŽŽ�’“”••��‹Š‰‡…„ƒ‚„…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„†‡†…†‡‰ŠŒŽ�‘”˜šœœ���œš˜—•“�Ž�Œ‰‡ˆŠŠ‰Š‹ŒŒ�Ž�‘‘“•—––—˜˜šœœ��žŸŸ ¡¢£¤¤¤¤¤¤¥¤¢ž›–’���’”–˜š›š˜™œžŸŸž��ŸŸ  ž�œ˜”‘�Œ‰„‚‚‚‚‚‚‚‚‚‚ƒ†Š‹ŒŽ����‘•˜™››š—•‘�Œ‹Œ�Ž��‘”—˜—”’“””””“•—•••”““’���Ž�‹ˆ„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ„…†ˆŠ‹ŽŽ�‘““•––“�‹ˆ…ƒ‚‚‚ƒ„„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚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ƒ‚‚‚ƒ„…„„…††ˆŒ�‘“”””““”–™ž¢¥§¨©©©«®­­¯°¯¬©¦¥¦¨©§¥¤¢Ÿ™“‘’””•––———˜™œ¡¦ª­­ª¦¢�˜’Ž‹‰‡††‡‡‡ˆŠ‹Š‰‰Š‹‹‹‹ŒŒŒ�Ž�ŽŽŽ�‹‹‰ˆ††…†‡‰Šˆ„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„……ƒ‚‚‚‚‚ƒ†………‡ˆŠ����‘“’’’“–› ¤¥¥¦¨©«­°®®°³²¯«¨§¨©©¦¤¡žš•���‘“”””••–—˜› ¤©­¬¨¤žš–’Ž‹ˆ‡††‡‡††ˆ‡‡‰Š‹Œ‹Š‰‰Š‹Œ�ŒŒŒ�Œ‹ŒŒ‹Š‰ˆˆ‰ŠŠ‡„ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„ƒ‚‚‚‚ƒ†‰‡……‡ˆŠŒŽŽŽ�‘‘‘’”—›¡¥¦¦¦§©«¯±¯¯²´³±®ªªªªª¦£Ÿš–‘Œ‹ŒŽ�‘‘�‘”–—™œŸ£¨­«¨¢›˜”��‹‰ˆ‡††………„„…ˆ‹Ž��Š‰ˆ‰ŠŒ�Œ‹Œ�‹Œ��ŽŽ�Œ‹Œ‹Š‡………„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„ƒ‚‚‚ƒ…ˆŠ‡………†ˆ‹Ž��Ž��‘“•˜œ¡¥¦§¦§¨ª®°°±²³³²°®­¬«©¤ ›—’�ŠˆˆŠ‹����“–™›ž¡¥©¬©¥Ÿš–’��‹‰ˆ†„ƒ‚ƒ‚‚‚ƒ‡ŒŽ�ŽŒŠˆŠŒ��ŽŒ‹‹‹Œ�’’“‘�Ž�Š‡‡‡ˆ‰‡„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒƒ‚ƒ……ˆŠ‡……†‡ˆ‹Œ�Ž��‘’–˜›ž¢¥¦§§§¨ª­¯°±³´³²±°®¬ª¨£ž˜“�Œˆ…†ˆŠŠŠ‹Ž’—™� ¢¥©¬¨¤ž™•’��Œ‹‰‡„ƒƒƒ‚‚‚„ˆ‹Ž�Ž�Šˆ‹���ŽŒŠ‰‹Ž’”••”’��‰‡ˆŠ‹Šˆ†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†‡…„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„„…‡‡†‡‰Š‰‰‰ŠŒŽ�‘“–™œ ¢£¥¦§¥¥¦¨ª«¬®±´²°¯®¬ª©§£ž—‘�Œ‡„…ˆŠ‹‹Œ�”—™›� £§ª§¢�™—”��ŒŒŠ‰‡†……………ˆ‹��Œ‹Šˆ†ˆŠŒ�‹‰ˆ‰Œ�’”•––•’ŽŠˆ‰Š‰ˆˆ†„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„…„„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†‡ˆ‰‹‹Š‰ˆˆ‹Ž�’—›� £¤¤¥¦¦¥¥¥¦§¨©«¯±°¯®®¬ª©§¢œ–’��‡„„‡ŠŒ�Ž’•—˜™›ž¡¦©§£Ÿ›™—“Ž��ŒŒ‹‰‡‡‡ˆŠŒ��Œ‹‰‰‡†‡ˆŠŠˆ‡‡‰��’“•–—–“�‹ˆ‰Šˆˆ‡‡‡†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†ˆ‰‹Œ�‹‰‡‡‹�’–šœ ¤¦¦¦¦¤¤¥¦¦¦¦¦§©¬¯±±°¯¬ª©¦¡œ˜”‘�‡„…‡Š�Ž�’•——˜šœ ¥§§¥¢Ÿ�›–‘�Ž����‹Š‰‰‹ŽŽ�ŒŠŠ‰‡‡‡ˆŠ‰‡‡‡ŠŽ�‘”–——–“��‹Š‰ˆˆ‡‡ˆ‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ‚‚‚‚‚ƒ„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†‰‹��ŒŠ‰ˆˆ‹Ž“—›ž£§§§¦¦¥¤¥¨§¥¥¥¦©­°²²±°­«¨¥ ›˜•‘Œ‡„…ˆ‹Ž�’“•–———šŸ¤¨§¥¤¡žœ—’��ŽŽŽŽ�Œ‹‹��ŽŒ‹‹Šˆˆˆˆˆ‰ˆˆ‰‰‹Ž‘“–———–“‘Ž‹Šˆˆ‰ˆˆˆ‰‡…‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‚‚‚‚‚‚ƒ„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‡Š‹Šˆ‡‰Š‹��“–šŸ£¦¦§¦§¦¥¦¦¥¥¤¤§«¯²²±±¯¬¨¦¤ž™•’ŽŠ†ƒ„ˆ‹�Ž�’••–••˜�¢¥£¡ žœ›—“���Ž�ŒŒŒ‹ŠŠ‹‹ŒŒŒŠ‰‰ˆˆ‰‰ˆŠ‹Š‹Ž‘”–••–•“�‹ˆˆˆˆ‰‰ˆ‡†„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‡ˆ‡†‡Š���‘’•šŸ£¦§¦§¨§¥¦¦¦¦¦§ª®²´²¯°¯ª¥£¡œ—“�ŒŠ†ƒ…‡ŠŒŽ�’••”’’–›Ÿ¢¡Ÿ�›š™—“�Ž��ŒŠ‹Œ‰‡ˆ‡‰‹�ŽŒ‰‰ˆ‰‰‰ŠŒŒ‹ŒŽ’”•””””’�‰†‡‡ˆ‰ˆˆ†„ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„ƒ‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„…†‰Œ�”•””–™ž¢¥¥¦¨ª§¥¥¦§©©ª¬¯±´²°®­¨£¡Ÿš•�‹‰ˆ†…†‡‰Œ��“•”’�’”˜›ž�œ™—–•”“’‘��ŒŠ‰ˆ††††ˆ‹Ž��‰ˆ‡‡ˆ‰Š‹‹‹ŒŽ‘“••”“’�Œ‡††‡ˆ‰ˆ‡……„ƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ„‚‚ƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…Š�•˜˜˜˜™š� ¤¥¦©ª¨¦¦¦§©ª¬­¯²µ²¯®«¦£ �™“Ž‰‡‡‡†…†‰‹Œ�’”“���’•˜šš˜–”““”””’‘�Œ‰‡‡†……„ˆŒ�’�‹‰†‡‰ŠŠ‹‹‹‹��’””“‘�‹ˆ†„„†‰Šˆ‡…„ƒƒ„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…†„ƒƒ„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚…‹’—š›�žž ¡¢¤¥§¨¨¨©¨§¨©«®°²´µ±®«©¥¡�š—“�‡„„…„ƒ…‡ˆŠŒ�‘‘��‘“””••”“””–––•“�ŽŠ‡‡‡…„„…‰��‘��Š‡‡ˆ‰‰‰ŠŠŠ‹�Ž��Ž‹ˆ‡†„‚‚„‡Š‰‡„ƒƒ…„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†‡…ƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†Ž”˜�Ÿ¢£¤¤¤¥¥§¨¨©ª«©¨©«®²´µ··²­ª§£ œ˜–’‹†„„ƒ‚ƒ„…†ˆ‰ŒŽŽŽ��‘‘‘’’’’“•–—–”‘Ž‹‰‡‡‡…„„†‰ŒŽ‘��Œ‰‰ˆ‰‰ŠŠ‰ˆŠ‹�ŽŒ‰†„„„ƒ‚‚ƒ†‰Šˆ†………ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…„…‡ˆ†„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‰�•› £¦§¨¨©¨§¨ª«««ª©©«®±µ¶¸º¹´¯©¥¡žš—”�‹‡††ƒƒ‚‚‚ƒ„†ˆ‹‹‹ŒŽŽŒ�Ž�‘‘“““”•’ŽŒ‹‰ˆ‡†…„…‡‰Š��ŽŽŒŒ‹Š‰ŠŠŠ‰‰‹�Ž�Œ‰…‚‚‚‚‚‚ƒ†‰Š‰ˆ‡…ƒ‚‚‚‚‚‚‚‚‚‚ƒƒƒ‚‚ƒ…††‰‹‹‰†„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‡Š‘—�¢¥¨©ªª«ª©ª¬¬«ªª©©¬¯³¶¸º»ºµ¯©¤ œ™—”�Œ‰ˆ‡…„ƒ‚‚‚‚ƒ‡ˆ‰Š‹Œ‹ŠŠ‹Ž�����’”�ŒŒŠ‰ˆ‡ˆˆ‡‡‰‰‰ŒŽ�����ŒŠ‰‰ŠŠŠ‹ŒŽŽ‹‡„‚‚‚‚‚‚„†‡ˆ‡‡†„‚‚‚‚‚‚‚‚‚‚ƒ„„ƒƒƒ„…‡‰‹��‹‰†„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†ˆˆŠ�–œ¡£¤¥¦¦¦¦§¨©ª«ª©¦¦©­±´¸»½½¸³¬§ ›š™•‘ŽŒŠ‰ˆ‡…ƒ‚‚‚…††ˆ‰ŠŠŠ‹ŠŠŒ��ŒŒ��’ŽŒ‹Š‰ˆ‰ŠŠ‰‰‰‰Š‹�Œ‹ŠŠŠŠˆ†‡ˆˆˆ‡‡‰Š†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ‚‚‚‚ƒ…ˆˆ‰���Š‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‡ˆ‰ˆ‰Ž•›Ÿ ¡¢£££¤¥¦¨ªª©¨¥¤§¬°³¸º½¾¹´®¨¡žœ›—“‘��‹‹‹ˆ„ƒ‚„………†ˆ‡‰Š‹Š‰‰‰‰Š‹‹Ž‘ŽŒ‹‹ˆˆŠŒŒ‹Š‰‰‰ŠŠŠ‰‡‡‡†„„†‡†„ƒƒ…†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…ˆˆ‰Œ��Šˆ‡„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„‡‰‹‹Œ‘–›Ÿ Ÿ ¢£¤¥¥¦§¨©§¤¡¡¤ª­²µ¸»½¹µ°©£Ÿ�œ—””“�ŽŽŽŠ‡……ƒƒƒ„†ˆ‰‰ˆ‰‡†………†‡‰Ž‘�ŒŠˆ†‡ŠŒ‹Šˆ‡ˆ‰ˆˆ‡†……ƒ‚‚‚„…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‡†‡‹Ž�‹ŠŠ‡…„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…ŠŒŽ��”–šžžžŸ ¢¤¤¦§§¨¨¤ žŸ£¨¬°³¶¹»¹¶°ª¤ ž›˜———•“‘�ŒŠˆ†ƒƒ„„†‡ˆˆˆ‰ˆ†„„ƒ„…ˆ‹ŽŒŠ‡‡†ˆŠŒ‹Š‰‰‰ˆ‡††…„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ………‡ŠŒŠˆ‰Š‰‡†„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‰�Ž�‘“”•˜ššš›� ¢¤¦¦§¨¨¤ ŸŸ¢¦©«¯³¶¹·´¯ª¥¡�›™™šš˜”’��‹ˆ‡……„ƒƒƒ„„…‡‡†…†„„…†ˆ‰‡…„……†‰‹ŒŒ‹‹‰‡†‡††„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„„„†‰†……†††…„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ…†‰Œ‘’”––•“”–––™šž¢¥¦¥¦§§£ŸŸŸ ¡¤§«°´¶µ³¯«§¢žœ››œœ™–”‘Ž‹‰ˆ‡‡„‚‚‚‚‚ƒ„…†††„ƒ„…†…ƒ‚‚‚ƒ„ˆ‹ŒŒŒŒ‰†…‡‡‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†„ƒ‚ƒ„„„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†‰ŠŒŽ’—˜™˜—”’“””•—™�¡¤¦¦¦¦¤ ��žžŸ £¨­±³²±¯­©¦¢Ÿž��œš™—”‘��‹‡„‚‚‚‚‚‚‚ƒ†‰ˆ…‚‚‚„„ƒ‚‚‚‚‚ƒ…ˆ‰‰ŠŒŠ‡‡‡‡‡†…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚†‹Ž‘”—š��›š˜•””””•—™�¡¤§¦¦¤ ž�œœœ›ž¡¥©­¯¯°¯®ª§£¡ ž�œ›™—”‘�Ž‹†ƒ‚‚‚‚‚‚‚‚†Šˆ„‚‚ƒƒ‚‚‚‚‚‚‚‚ƒ……†‰‹‰ˆ†††††…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‡Œ�“˜œ�Ÿžœ›š˜™™˜˜˜™›� £¥¥£Ÿ�œšš›™™šœ¡¦¨ª¬­«©¦£¡¡Ÿ�œš˜•’��‹Šˆ„‚‚‚‚‚‚‚‚‚†Š‡ƒ‚‚‚ƒƒ‚‚‚‚‚‚‚‚‚‚ƒ………ƒƒƒƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…„„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„ˆŒ�–›ž¡ ž�œœžŸž�œœœ�Ÿ¡£¢ œ›™˜™˜˜—˜™ž£¦¨©©¨¥£¡¡ �›™–“�ŽŒ‰†……‚‚‚‚‚‚‚‚‚ƒ‡‰†ƒ‚‚‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ††…ƒ‚‚ƒƒ„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„ˆ‹�•›Ÿ¤£¡   ¢£¤¢ ž�ž   žœš™—•••–———šŸ£¦¥¥¤¢¡  žš—”’ŽŒŠˆ†„„„‚‚‚‚‚‚‚‚ƒ…††„ƒ‚‚ƒ„„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‡†…ƒƒ…‡ˆˆ…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚…ˆŠ�”š¡¦¥¤¤£¤¦¨©¨¥¢Ÿ ¡ ž›˜™˜–“““”•––˜œ¡¤£¡  Ÿ žœ—“‘�Œ‹‰†…ƒ„ƒ‚‚‚‚‚‚‚‚ƒ„……„„ƒ‚ƒ„„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„ˆ‡†……‡Š‹Œ‰†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†‰�”›¢¦¦¦¤¤§ª«¬ª¨¤¡¡¢ žš˜˜˜”���‘‘‘’•™ž¡Ÿœœœœœš˜•“’�Ž�‰‡††…„ƒ‚‚‚‚‚‚‚‚ƒ„†„„ƒ‚‚ƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚…ˆ†…„„†ˆ‹�‹‰…‚‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†Š‘–œ£¨¨¦¥¦¨«­¯®«¦¢¢¢¡Ÿ›˜–”’�ŽŽ�Ž��’•š�œššš™˜––•”’‘�ŽŠ‡‡††…ƒ‚‚‚‚‚‚‚‚‚„†…„„ƒ‚‚ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚…ˆ†„ƒ„†‰ŒŽ�Š…ƒ„……„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‡�“˜ž£¨§¦¥¦¨ª®°¯¬¨§¥¢¡Ÿ›˜”’��ŽŽŽ���‘”˜š™ššš˜—–•••““��Šˆ†………ƒ‚‚‚‚‚‚‚‚‚„…„„„„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„‡†…†ˆŠ‹�Ž�Š‡††ˆ‰ˆ…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚…Š�–™�£§¦¥¥¦¨«®±¯­ª§¤¢¡Ÿœ˜”��Ž�ŒŒ�����“•–˜˜—••”““’‘‘ŽŠˆ‡…„„ƒ‚‚‚‚‚‚‚‚‚‚ƒƒƒƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…„†‡Š‹Œ��Ž‹‰ˆ‰‹�Œˆ…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒˆ�’—šž£§¦¥¥¦©«®¯®«¥¡ŸŸ�›™—“�ŒŠ‰‡‡†…‡‡ˆ‹������Ž��ŒŠ‰ˆ†„„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ„†‰‰‹�‘Ž‹ŠŠŠ‹��‰†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„‰�”˜œ £¤¦§¦§¨ª­®¬¨¢�œœ›š˜–’�Š†…„ƒ‚‚‚‚„…‡ˆ‰‰‰‰ˆ‰Š‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…†ˆˆ‰Ž‘����Œ�ŽŽ‹‡„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‡Œ’–™� ¡£¥¦¦¦¥¥¨ª§¤Ÿ›š™˜—•“��‡„‚‚‚‚‚‚‚‚‚‚ƒ„„„ƒƒ……ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„††Š�’’‘������ŒŠ†„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†‹�•˜šœž ¢£¤¤£¢¢¤¥£¡œš—–•“’‘Ž‹‡ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„‡Š�””“’‘‘����Šˆ…„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚†‹�”˜›žžŸ¡£££¢¡ŸŸ ¡Ÿ�š—”“‘�ŽŒŠˆ„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†ˆŒ‘”““’’’’���‹ˆ†„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„‰Ž“˜›Ÿ¢£¤¥¥¥¤£¡ž���›˜–“‘�ŒŠ‰ˆ†„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†‰Œ‘”“““”“‘��Ž�‰‡„ƒ„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒˆ�“˜œ ¤§¨§§¨¨¦£Ÿ�œ›˜”’���Œ‰†„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…ˆ‹�’‘�’’��Ž�Ž�Œ‹‰‡†„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚†Œ“™ž¡¥¨ªª©ª«ª¦¢Ÿ�›™•‘�ŽŒŠ‰†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…ˆŠ��ŽŽ‘“‘�������ŒŠ‡„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„‰�˜Ÿ£¥¨ª¬¬¬¬¬©¦¢Ÿ�œ™•“‘Ž‹ˆ†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‡ŠŒŒŽ‘“’’’“’‘‘‘�‰†„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚…‰�–œ¡¤¦©««¬¬­ª¦£¡Ÿ�™—•’Ž‰‡„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„ˆ‹ŒŽ’““”•–•“““�‹‡…„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‡‹�•› ¤¦ª««¬®¯«¨¥¢Ÿœ™˜”‘�‰†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‡ŠŒ�‘’’”–™˜––•’�Š‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„ˆŒ�“˜�¡¦ª­­®±³®©¦¢Ÿœ›™”‘�ˆ„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‡Š���‘’”—š™˜—–“‘�‰‡„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‚ƒ„…‰Ž�’–š ¥«®¯°²´¯«§¤¡žœ™•‘‹†ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…ˆ‹Ž�’“•˜š™——–“��‹ˆ†„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‡‡‰‰ŠŒŽ�’•™Ÿ¥¨«­°´¶²­©¥¢Ÿ�›—‘Š…‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„ˆŠŒ�’”•˜š˜˜—•“�Ž�‹‰…ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…ˆŒŽ�����“”–™ž£§ª­±µ·²­§£¡ žœ—‘‹…‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‡ˆŠ�‘’“–˜–•••“‘‘‘ŽŠ‡†…„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†‰�‘“•––””•–—šŸ¥¨«­°´µ±¬¨¥£¡ž›–�Š„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†ˆ‰��‘“–—•”””“““’�Œ‰ˆ‡†„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†‰�‘”—ššš™™™™šœ ¥¨«­°´¶³¯ª¦£¡œ—’�‡ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…ˆ‹Ž��“”•“’“”””“’��Š‡…„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒˆ��‘•™š›››šš™š�¢¦©¬°´µ³°«§¤Ÿ™”�‹‡ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„ˆ‹�Ž‘“““’’“”““’’�Ž‹ˆ…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„‰�Ž�•™›œœ››™˜˜› ¥©¬°³³±®¬©¢œ—“Ž‹‡„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚…ˆŠŒ��‘’“’‘‘‘‘‘’‘��Œ‹‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚…ŠŽ�”˜š›œœ�š˜——›¡§ª¬¯±±¯®«§ š•��Š‡„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‡ˆ‹Ž�‘“”“’’‘’‘’�ŽŒ�Œ‰†„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†Š��”–™›œœœ™™——œ£©¬¬­¯¯­ª§¤Ÿ˜’Œˆ…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‡‰‹��’”•”•““’’’‘Ž�Ž�‹ˆ…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†‰Œ�“–˜™˜—˜˜–—œ£¨ª«®¯®ª§¤ œ–�ˆ„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†ˆŠŒ��’•——–•””“’‘�Ž��Œˆ„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…†‰��“•–””–––˜�¤§ª«­®®©¤ œ—’Œ‡ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‡‰Œ�’”–˜˜˜—•”’’“’’‘�‹ˆ„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‰�‘’‘‘’”–˜™ž£§«¬®¯®¨¢ž™”�Š‡„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„‡ŠŽ’””––—˜—•“’““““‘�Š‡ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„ˆŒŽŽŽ�‘“–˜›ž¢§ª¬®®¬¥ œ™”�‹‡ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†Š���’’“”“’’‘‘‘‘�Ž‹ˆ…„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„‰ŒŒ�ŽŽ�’•™�žŸ£§ª¬­«¥ �š•�‹‡ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒƒƒƒƒ‚ƒƒ‡ŠŒ�Ž������������‹‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†ŠŠŠ‹Œ�Ž’–šž�ž¢¥§ª¬«¦¡�™”�‹ˆ…„ƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†††…„ƒ„„…‰ŒŒ�ŽŽŽ��‹ŠŠ‹ŒŒŒŠˆ…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†ˆ‡‡ˆ‹ŒŽ’—›ž�ž ¡£¦ª©¥ œ˜•‘�Šˆ††‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…ˆ‰ˆ†„„†‡ˆŠ‹Œ�ŽŽ�ŒŠˆ†‡‡‰ŠŠˆ†„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‚‚‚‚‚‚‚‚‚‚ƒ„…†††ˆŠŒ�”˜›�žžžž¡¤¦¥£ ›—”’Ž‹ŠŠ‰ˆ†…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…ˆŠŠˆ††‡ˆ‰‹Œ����Œ‹ˆ†……„„…‡…„ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…ƒ‚‚‚‚‚‚‚‚ƒƒƒƒ„…‡‰��”–˜šœ�ž�� £¢¡ �™•”‘�Ž�ŒŠ‰‡†…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…ˆ‰Š‹ŠŠ‰‰Š‹ŒŽ���Ž�‹‡…„ƒ‚‚ƒƒƒ‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚†ˆ…ƒ‚‚‚‚‚ƒ„…„ƒƒƒ…†‰�’–˜˜šœ��œœŸ¡ ž›˜–”’‘��Œ‹Š‰ˆˆ‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒƒƒ„†ˆŠ‹Œ��Ž�ŒŒ���‘‘��ŽŒ‡…ƒ‚‚‚‚‚‚‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„ˆŠˆ‡„ƒƒƒ…‡ˆˆ†„ƒ„…‡Š�“˜™™›žž�››œžžžš–”’‘�‘�ŒŠ‰ˆˆˆˆ‡„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„„ƒ„†ˆ‹�ŽŽŽ�‘��ŽŽ�‘’‘���‹‡„‚‚‚‚‚‚‚ƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ‚‚‚‚‚‚‚ƒ„†ŠŒ‹‰†„„…ˆ‹‹‰‡…„…‡ˆŒ�•™šš�Ÿžž�œœœ�Ÿœ˜•”’���‹ˆ‡‡†††‡„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒƒ„‡‹Ž��Ž��Œ‹‹‹‹Œ�Ž�Œ‹‹ˆ†„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„‡ŠŒŽŒ‰†…„…ˆ‹‹‹Šˆ‡‡‡ŠŽ‘•™™š���ž�œœ�Ÿ¡ž›˜—“‘��‹ˆ‡†„„…†„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„„ˆŒ�’��Œ‹Š‰‰‰ˆ‰ŠŠ‰‰‰Š‰ˆ†…ƒ‚ƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„„†ŠŒŽ��Š‡‡††ˆ‹ŒŒŒ‹‰‡ˆ‹��•˜™š›œ�ž��žž¡¡Ÿ�›™”‘��Šˆ†„ƒƒ„†„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„…„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…†‡Š��’�ŽŒŠˆˆ‰ˆ†‡ˆ‰ˆˆˆ‰ˆ‡††„„„„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†‡ŠŒ��‘�ŒŠˆ‡‡Š����‹‰‰Š‹Œ�“–˜™™šœ��ŸŸ ¢¡ Ÿœ™”‘��‹ˆ…ƒ‚‚ƒ„ƒƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…†…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†ˆ‰Š�‘’‘ŽŒˆˆ‰‰‡††‡ˆ‡ˆ‰‰ˆˆˆ‡†‡‡†„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‚‚‚‚‚‚‚ƒ„†‰‹ŒŽ‘“‘��‹ŠŠŒ�Œ�Ž�‹‹Œ‹Œ�’•—™š›œ�Ÿ Ÿ Ÿ�œ›™–“’�Ž‹‡„ƒƒ‚‚‚‚‚‚„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…‡ˆ‰‹��‘��Š‰‰‰ˆ‡‡‡‰Š‹Œ‹‹Š‹‰ˆˆˆ‡‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†ˆŠ�‘””’‘�Ž����Ž��Ž�ŽŽ�’”•—™š›œ���œœœ›š™—•”“��‰†„„ƒ‚‚‚‚‚ƒ„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„†‡ˆ‹�Ž�‘�ŒŠŠŠŠ‰‰‰Š‹Œ�Ž��ŒŒ‹Š‰ˆ‡‡„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„‡Š�’•••–”’‘���‘’’’’‘’”••–™››œ��œœ›ššš™˜—–”‘Ž‹‡ƒ‚‚‚‚‚‚‚‚ƒ„„„ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…†††‡‰ŠŒ���‹‹‹‹Œ‹‹Œ�ŽŽŽŽ��ŒŒ‹‹Šˆˆ‡„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†ŠŽ“•–˜˜˜—–•••––•••“’“•–—™›����œ›™™š™—––•’��Š…ƒ‚‚‚‚‚‚‚‚ƒ„……†„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„†ˆ‡†ˆ‰‰‰Œ��ŒŒŒŒŒŒ������Ž����ŒŒ‰ˆˆ‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„‰Ž’•——˜šš™˜—˜™™˜—•”“•———˜šœœ››œš˜˜—•”’‘‘��Œ‡„„ƒƒ‚‚‚‚‚‚‚ƒƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚…ˆ††‡ˆ‡‡ŠŒŒ��Œ‹Œ���ŽŽ�‘��Ž�Œ‹‹ŠŠˆ‡…ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ‡Œ�“““•–——–––˜˜–––––——–––˜˜—˜šš™—–•“‘�ŽŽŽŒˆ…„„„„‚‚‚‚‚‚‚ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ‚‚ƒ†‡††††…†ˆŠŒ�ŒŒ‹��‘��Ž�����Ž�Œ‹ŠŠˆˆ‡„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚…‰�‘�‘’”•••––——–—˜˜™™—•”•––••—˜˜–”’Ž�ŒŒ�Šˆ…„ƒ‚‚ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒƒ„…‡‡………†ˆˆˆˆ‡ˆŠŒ�’“‘���Ž�’‘����Œ‹Š‰†„„ƒ‚‚ƒƒƒ„ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ†‡‡…………„ƒ‚‚ƒƒƒƒ‚‚‚‚‚ƒ„†ŠŽ���‘“–˜™—–•”–—™š—•“’”••””““”‘�ŒŠ‰‰Š‹‡„ƒ‚‚‚‚ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ…„ƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„†‡†††††‡ˆˆˆ‡‡ˆŠ�‘”•“‘ŽŽ�‘””’‘‘���ŒŠ‡……„ƒ‚„……………„ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚…ˆŠŠ‰‰‰ˆ†„ƒ„…††„‚‚‚‚ƒƒ„†ŠŽ���‘”—š›™–”“”—››—”’‘’’“”’���Œ‹Šˆ††ˆ‰†…„ƒƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚ƒ„‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚„„„„…†‡‡‡ˆ‹‹‹Œ��’•–•“‘‘‘“••”“‘�Ž�‹Š‰‰‡†……‡ˆ‡†‡‡††††…ƒƒ‚‚‚‚‚‚‚‚‚‚„‡ŠŠ‰‰ˆ†…„„……††…ƒ‚‚‚ƒ„††ˆŒ���‘“”–šœ™–’‘’–™š˜•‘���’’��Œ‹ŠŠˆ…„„†‡†…„„ƒƒ‚‚‚‚‚‚‚‚‚‚‚‚‚‚‚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diff --git a/progs/demos/tessdemo.c b/progs/demos/tessdemo.c
new file mode 100644
index 000000000..26403eee0
--- /dev/null
+++ b/progs/demos/tessdemo.c
@@ -0,0 +1,524 @@
+
+/*
+ * A demo of the GLU polygon tesselation functions written by Bogdan Sikorski.
+ * Updated for GLU 1.3 tessellation by Gareth Hughes <gareth@valinux.com>
+ */
+
+#include <GL/glut.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_POINTS	256
+#define MAX_CONTOURS	32
+#define MAX_TRIANGLES	256
+
+#ifndef GLCALLBACK
+#ifdef CALLBACK
+#define GLCALLBACK CALLBACK
+#else
+#define GLCALLBACK
+#endif
+#endif
+
+#ifdef GLU_VERSION_1_2
+
+typedef enum{ QUIT, TESSELATE, CLEAR } menu_entries;
+typedef enum{ DEFINE, TESSELATED } mode_type;
+
+static GLsizei		width, height;
+static GLuint		contour_cnt;
+static GLuint		triangle_cnt;
+
+static mode_type 	mode;
+static int		menu;
+
+static GLuint		list_start;
+
+static GLfloat		edge_color[3];
+
+static struct {
+   GLfloat	p[MAX_POINTS][2];
+   GLuint	point_cnt;
+} contours[MAX_CONTOURS];
+
+static struct {
+   GLsizei	no;
+   GLfloat	p[3][2];
+   GLclampf	color[3][3];
+} triangles[MAX_TRIANGLES];
+
+
+
+static void GLCALLBACK error_callback( GLenum err )
+{
+   int		len, i;
+   char const	*str;
+
+   glColor3f( 0.9, 0.9, 0.9 );
+   glRasterPos2i( 5, 5 );
+
+   str = (const char *) gluErrorString( err );
+   len = strlen( str );
+
+   for ( i = 0 ; i < len ; i++ ) {
+      glutBitmapCharacter( GLUT_BITMAP_9_BY_15, str[i] );
+   }
+}
+
+static void GLCALLBACK begin_callback( GLenum mode )
+{
+   /* Allow multiple triangles to be output inside the begin/end pair. */
+   triangle_cnt = 0;
+   triangles[triangle_cnt].no = 0;
+}
+
+static void GLCALLBACK edge_callback( GLenum flag )
+{
+   /* Persist the edge flag across triangles. */
+   if ( flag == GL_TRUE ) {
+      edge_color[0] = 1.0;
+      edge_color[1] = 1.0;
+      edge_color[2] = 0.5;
+   } else {
+      edge_color[0] = 1.0;
+      edge_color[1] = 0.0;
+      edge_color[2] = 0.0;
+   }
+}
+
+static void GLCALLBACK end_callback()
+{
+   GLuint	i;
+
+   glBegin( GL_LINES );
+
+   /* Output the three edges of each triangle as lines colored
+      according to their edge flag. */
+   for ( i = 0 ; i < triangle_cnt ; i++ ) {
+      glColor3f( triangles[i].color[0][0],
+		 triangles[i].color[0][1],
+		 triangles[i].color[0][2] );
+
+      glVertex2f( triangles[i].p[0][0], triangles[i].p[0][1] );
+      glVertex2f( triangles[i].p[1][0], triangles[i].p[1][1] );
+
+      glColor3f( triangles[i].color[1][0],
+		 triangles[i].color[1][1],
+		 triangles[i].color[1][2] );
+
+      glVertex2f( triangles[i].p[1][0], triangles[i].p[1][1] );
+      glVertex2f( triangles[i].p[2][0], triangles[i].p[2][1] );
+
+      glColor3f( triangles[i].color[2][0],
+		 triangles[i].color[2][1],
+		 triangles[i].color[2][2] );
+
+      glVertex2f( triangles[i].p[2][0], triangles[i].p[2][1] );
+      glVertex2f( triangles[i].p[0][0], triangles[i].p[0][1] );
+   }
+
+   glEnd();
+}
+
+static void GLCALLBACK vertex_callback( void *data )
+{
+   GLsizei	no;
+   GLfloat	*p;
+
+   p = (GLfloat *) data;
+   no = triangles[triangle_cnt].no;
+
+   triangles[triangle_cnt].p[no][0] = p[0];
+   triangles[triangle_cnt].p[no][1] = p[1];
+
+   triangles[triangle_cnt].color[no][0] = edge_color[0];
+   triangles[triangle_cnt].color[no][1] = edge_color[1];
+   triangles[triangle_cnt].color[no][2] = edge_color[2];
+
+   /* After every three vertices, initialize the next triangle. */
+   if ( ++(triangles[triangle_cnt].no) == 3 ) {
+      triangle_cnt++;
+      triangles[triangle_cnt].no = 0;
+   }
+}
+
+static void GLCALLBACK combine_callback( GLdouble coords[3],
+					 GLdouble *vertex_data[4],
+					 GLfloat weight[4], void **data )
+{
+   GLfloat	*vertex;
+
+   vertex = (GLfloat *) malloc( 2 * sizeof(GLfloat) );
+
+   vertex[0] = (GLfloat) coords[0];
+   vertex[1] = (GLfloat) coords[1];
+
+   *data = vertex;
+}
+
+
+static void set_screen_wh( GLsizei w, GLsizei h )
+{
+   width = w;
+   height = h;
+}
+
+typedef void (GLAPIENTRY *callback_t)();
+
+static void tesse( void )
+{
+   GLUtesselator	*tobj;
+   GLdouble		data[3];
+   GLuint		i, j, point_cnt;
+
+   list_start = glGenLists( 2 );
+
+   tobj = gluNewTess();
+
+   if ( tobj != NULL ) {
+      gluTessNormal( tobj, 0.0, 0.0, 1.0 );
+      gluTessCallback( tobj, GLU_TESS_BEGIN, (callback_t) glBegin );
+      gluTessCallback( tobj, GLU_TESS_VERTEX, (callback_t) glVertex2fv );
+      gluTessCallback( tobj, GLU_TESS_END, (callback_t) glEnd );
+      gluTessCallback( tobj, GLU_TESS_ERROR, (callback_t) error_callback );
+      gluTessCallback( tobj, GLU_TESS_COMBINE, (callback_t) combine_callback );
+
+      glNewList( list_start, GL_COMPILE );
+      gluBeginPolygon( tobj );
+
+      for ( j = 0 ; j <= contour_cnt ; j++ ) {
+	 point_cnt = contours[j].point_cnt;
+	 gluNextContour( tobj, GLU_UNKNOWN );
+
+	 for ( i = 0 ; i < point_cnt ; i++ ) {
+	    data[0] = (GLdouble)( contours[j].p[i][0] );
+	    data[1] = (GLdouble)( contours[j].p[i][1] );
+	    data[2] = 0.0;
+	    gluTessVertex( tobj, data, contours[j].p[i] );
+	 }
+      }
+
+      gluEndPolygon( tobj );
+      glEndList();
+
+      gluTessCallback( tobj, GLU_TESS_BEGIN, (callback_t) begin_callback );
+      gluTessCallback( tobj, GLU_TESS_VERTEX, (callback_t) vertex_callback );
+      gluTessCallback( tobj, GLU_TESS_END, (callback_t) end_callback );
+      gluTessCallback( tobj, GLU_TESS_EDGE_FLAG, (callback_t) edge_callback );
+
+      glNewList( list_start + 1, GL_COMPILE );
+      gluBeginPolygon( tobj );
+
+      for ( j = 0 ; j <= contour_cnt ; j++ ) {
+	 point_cnt = contours[j].point_cnt;
+	 gluNextContour( tobj, GLU_UNKNOWN );
+
+	 for ( i = 0 ; i < point_cnt ; i++ ) {
+	    data[0] = (GLdouble)( contours[j].p[i][0] );
+	    data[1] = (GLdouble)( contours[j].p[i][1] );
+	    data[2] = 0.0;
+	    gluTessVertex( tobj, data, contours[j].p[i] );
+	 }
+      }
+
+      gluEndPolygon( tobj );
+      glEndList();
+
+      gluDeleteTess( tobj );
+
+      glutMouseFunc( NULL );
+      mode = TESSELATED;
+   }
+}
+
+static void left_down( int x1, int y1 )
+{
+   GLfloat	P[2];
+   GLuint	point_cnt;
+
+   /* translate GLUT into GL coordinates */
+
+   P[0] = x1;
+   P[1] = height - y1;
+
+   point_cnt = contours[contour_cnt].point_cnt;
+
+   contours[contour_cnt].p[point_cnt][0] = P[0];
+   contours[contour_cnt].p[point_cnt][1] = P[1];
+
+   glBegin( GL_LINES );
+
+   if ( point_cnt ) {
+      glVertex2fv( contours[contour_cnt].p[point_cnt-1] );
+      glVertex2fv( P );
+   } else {
+      glVertex2fv( P );
+      glVertex2fv( P );
+   }
+
+   glEnd();
+   glFinish();
+
+   contours[contour_cnt].point_cnt++;
+}
+
+static void middle_down( int x1, int y1 )
+{
+   GLuint	point_cnt;
+   (void) x1;
+   (void) y1;
+
+   point_cnt = contours[contour_cnt].point_cnt;
+
+   if ( point_cnt > 2 ) {
+      glBegin( GL_LINES );
+
+      glVertex2fv( contours[contour_cnt].p[0] );
+      glVertex2fv( contours[contour_cnt].p[point_cnt-1] );
+
+      contours[contour_cnt].p[point_cnt][0] = -1;
+
+      glEnd();
+      glFinish();
+
+      contour_cnt++;
+      contours[contour_cnt].point_cnt = 0;
+   }
+}
+
+static void mouse_clicked( int button, int state, int x, int y )
+{
+   x -= x%10;
+   y -= y%10;
+
+   switch ( button ) {
+   case GLUT_LEFT_BUTTON:
+      if ( state == GLUT_DOWN ) {
+	 left_down( x, y );
+      }
+      break;
+   case GLUT_MIDDLE_BUTTON:
+      if ( state == GLUT_DOWN ) {
+	 middle_down( x, y );
+      }
+      break;
+   }
+}
+
+static void display( void )
+{
+   GLuint i,j;
+   GLsizei ii, jj;
+   GLuint point_cnt;
+
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   switch ( mode ) {
+   case DEFINE:
+      /* draw grid */
+      glColor3f( 0.6, 0.5, 0.5 );
+
+      glBegin( GL_LINES );
+
+      for ( ii = 0 ; ii < width ; ii += 10 ) {
+	 for ( jj = 0 ; jj < height ; jj += 10 ) {
+	    glVertex2i( 0, jj );
+	    glVertex2i( width, jj );
+	    glVertex2i( ii, height );
+	    glVertex2i( ii, 0 );
+	 }
+      }
+
+      glEnd();
+
+      glColor3f( 1.0, 1.0, 0.0 );
+
+      for ( i = 0 ; i <= contour_cnt ; i++ ) {
+	 point_cnt = contours[i].point_cnt;
+
+	 glBegin( GL_LINES );
+
+	 switch ( point_cnt ) {
+	 case 0:
+	    break;
+	 case 1:
+	    glVertex2fv( contours[i].p[0] );
+	    glVertex2fv( contours[i].p[0] );
+	    break;
+	 case 2:
+	    glVertex2fv( contours[i].p[0] );
+	    glVertex2fv( contours[i].p[1] );
+	    break;
+	 default:
+	    --point_cnt;
+	    for ( j = 0 ; j < point_cnt ; j++ ) {
+	       glVertex2fv( contours[i].p[j] );
+	       glVertex2fv( contours[i].p[j+1] );
+	    }
+	    if ( contours[i].p[j+1][0] == -1 ) {
+	       glVertex2fv( contours[i].p[0] );
+	       glVertex2fv( contours[i].p[j] );
+	    }
+	    break;
+	 }
+
+	 glEnd();
+      }
+
+      glFinish();
+      break;
+
+   case TESSELATED:
+      /* draw triangles */
+      glColor3f( 0.7, 0.7, 0.0 );
+      glCallList( list_start );
+
+      glLineWidth( 2.0 );
+      glCallList( list_start + 1 );
+      glLineWidth( 1.0 );
+
+      glFlush();
+      break;
+   }
+
+   glColor3f( 1.0, 1.0, 0.0 );
+}
+
+static void clear( void )
+{
+   contour_cnt = 0;
+   contours[0].point_cnt = 0;
+   triangle_cnt = 0;
+
+   glutMouseFunc( mouse_clicked );
+
+   mode = DEFINE;
+
+   glDeleteLists( list_start, 2 );
+   list_start = 0;
+}
+
+static void quit( void )
+{
+   exit( 0 );
+}
+
+static void menu_selected( int entry )
+{
+   switch ( entry ) {
+   case CLEAR:
+      clear();
+      break;
+   case TESSELATE:
+      tesse();
+      break;
+   case QUIT:
+      quit();
+      break;
+   }
+
+   glutPostRedisplay();
+}
+
+static void key_pressed( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+
+   switch ( key ) {
+   case 'c':
+   case 'C':
+      clear();
+      break;
+   case 't':
+   case 'T':
+      tesse();
+      break;
+   case 27:
+   case 'q':
+   case 'Q':
+      quit();
+      break;
+   }
+
+   glutPostRedisplay();
+}
+
+static void myinit( void )
+{
+   /* clear background to gray */
+   glClearColor( 0.4, 0.4, 0.4, 0.0 );
+   glShadeModel( GL_FLAT );
+   glPolygonMode( GL_FRONT, GL_FILL );
+
+   menu = glutCreateMenu( menu_selected );
+
+   glutAddMenuEntry( "clear", CLEAR );
+   glutAddMenuEntry( "tesselate", TESSELATE );
+   glutAddMenuEntry( "quit", QUIT );
+
+   glutAttachMenu( GLUT_RIGHT_BUTTON );
+
+   glutMouseFunc( mouse_clicked );
+   glutKeyboardFunc( key_pressed );
+
+   contour_cnt = 0;
+   mode = DEFINE;
+}
+
+static void reshape( GLsizei w, GLsizei h )
+{
+   glViewport( 0, 0, w, h );
+
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( 0.0, (GLdouble)w, 0.0, (GLdouble)h, -1.0, 1.0 );
+
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+
+   set_screen_wh( w, h );
+}
+
+#endif
+
+
+static void usage( void )
+{
+   printf( "Use left mouse button to place vertices.\n" );
+   printf( "Press middle mouse button when done.\n" );
+   printf( "Select tesselate from the pop-up menu.\n" );
+}
+
+
+int main( int argc, char **argv )
+{
+   const char *version = (const char *) gluGetString( GLU_VERSION );
+   printf( "GLU version string: %s\n", version );
+   if ( strstr( version, "1.0" ) || strstr( version, "1.1" ) ) {
+      fprintf( stderr, "Sorry, this demo reqiures GLU 1.2 or later.\n" );
+      exit( 1 );
+   }
+
+   usage();
+
+   glutInit( &argc, argv );
+   glutInitDisplayMode( GLUT_SINGLE | GLUT_RGB );
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize( 400, 400 );
+   glutCreateWindow( argv[0] );
+
+   /* GH: Bit of a hack...
+    */
+#ifdef GLU_VERSION_1_2
+   myinit();
+
+   glutDisplayFunc( display );
+   glutReshapeFunc( reshape );
+
+   glutMainLoop();
+#endif
+
+   return 0;
+}
diff --git a/progs/demos/texcyl.c b/progs/demos/texcyl.c
new file mode 100644
index 000000000..c04d5004e
--- /dev/null
+++ b/progs/demos/texcyl.c
@@ -0,0 +1,288 @@
+
+/*
+ * Textured cylinder demo: lighting, texturing, reflection mapping.
+ *
+ * Command line options:
+ *    -info      print GL implementation information
+ *
+ *
+ * Brian Paul  May 1997  This program is in the public domain.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <GL/glut.h>
+
+#include "readtex.h"
+
+#define TEXTURE_FILE "../images/reflect.rgb"
+
+#define LIT 1
+#define TEXTURED 2
+#define REFLECT 3
+#define ANIMATE 10
+#define POINT_FILTER 20
+#define LINEAR_FILTER 21
+#define QUIT 100
+
+static GLuint CylinderObj = 0;
+static GLboolean Animate = GL_TRUE;
+
+static GLfloat Xrot = 0.0, Yrot = 0.0, Zrot = 0.0;
+static GLfloat DXrot = 50.0, DYrot = 125.0;
+
+/* performance info */
+static GLint T0 = 0;
+static GLint Frames = 0;
+
+
+static void Idle( void )
+{
+   static double t0 = -1.;
+   double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+
+   if (Animate) {
+      Xrot += DXrot * dt;
+      Yrot += DYrot * dt;
+      glutPostRedisplay();
+   }
+}
+
+
+static void Display( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glPushMatrix();
+   glRotatef(Xrot, 1.0, 0.0, 0.0);
+   glRotatef(Yrot, 0.0, 1.0, 0.0);
+   glRotatef(Zrot, 0.0, 0.0, 1.0);
+   glScalef(5.0, 5.0, 5.0);
+   glCallList(CylinderObj);
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+
+   if (Animate) {
+      GLint t = glutGet(GLUT_ELAPSED_TIME);
+      Frames++;
+      if (t - T0 >= 5000) {
+         GLfloat seconds = (t - T0) / 1000.0;
+         GLfloat fps = Frames / seconds;
+         printf("%d frames in %g seconds = %g FPS\n", Frames, seconds, fps);
+         T0 = t;
+         Frames = 0;
+      }
+   }
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 10.0, 100.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -70.0 );
+}
+
+
+static void SetMode(GLuint m)
+{
+   /* disable everything */
+   glDisable(GL_LIGHTING);
+   glDisable(GL_TEXTURE_2D);
+   glDisable(GL_TEXTURE_GEN_S);
+   glDisable(GL_TEXTURE_GEN_T);
+
+   /* enable what's needed */
+   if (m==LIT) {
+      glEnable(GL_LIGHTING);
+   }
+   else if (m==TEXTURED) {
+      glEnable(GL_TEXTURE_2D);
+   }
+   else if (m==REFLECT) {
+      glEnable(GL_TEXTURE_2D);
+      glEnable(GL_TEXTURE_GEN_S);
+      glEnable(GL_TEXTURE_GEN_T);
+   }
+}
+
+
+static void ModeMenu(int entry)
+{
+   if (entry==ANIMATE) {
+      Animate = !Animate;
+      if (Animate)
+         glutIdleFunc(Idle);
+      else
+         glutIdleFunc(NULL);
+   }
+   else if (entry==POINT_FILTER) {
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+   }
+   else if (entry==LINEAR_FILTER) {
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   }
+   else if (entry==QUIT) {
+      exit(0);
+   }
+   else {
+      SetMode(entry);
+   }
+   glutPostRedisplay();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case ' ':
+      Animate = !Animate;
+      if (Animate)
+         glutIdleFunc(Idle);
+      else
+         glutIdleFunc(NULL);
+      break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   float step = 3.0;
+   (void) x;
+   (void) y;
+
+   switch (key) {
+      case GLUT_KEY_UP:
+         Xrot += step;
+         break;
+      case GLUT_KEY_DOWN:
+         Xrot -= step;
+         break;
+      case GLUT_KEY_LEFT:
+         Yrot += step;
+         break;
+      case GLUT_KEY_RIGHT:
+         Yrot -= step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( int argc, char *argv[] )
+{
+   GLUquadricObj *q = gluNewQuadric();
+   CylinderObj = glGenLists(1);
+   glNewList(CylinderObj, GL_COMPILE);
+
+   glTranslatef(0.0, 0.0, -1.0);
+
+   /* cylinder */
+   gluQuadricNormals(q, GL_SMOOTH);
+   gluQuadricTexture(q, GL_TRUE);
+   gluCylinder(q, 0.6, 0.6, 2.0, 24, 1);
+
+   /* end cap */
+   glTranslatef(0.0, 0.0, 2.0);
+   gluDisk(q, 0.0, 0.6, 24, 1);
+
+   /* other end cap */
+   glTranslatef(0.0, 0.0, -2.0);
+   gluQuadricOrientation(q, GLU_INSIDE);
+   gluDisk(q, 0.0, 0.6, 24, 1);
+
+   glEndList();
+   gluDeleteQuadric(q);
+
+   /* lighting */
+   glEnable(GL_LIGHTING);
+   {
+      GLfloat gray[4] = {0.2, 0.2, 0.2, 1.0};
+      GLfloat white[4] = {1.0, 1.0, 1.0, 1.0};
+      GLfloat teal[4] = { 0.0, 1.0, 0.8, 1.0 };
+      glMaterialfv(GL_FRONT, GL_DIFFUSE, teal);
+      glLightfv(GL_LIGHT0, GL_AMBIENT, gray);
+      glLightfv(GL_LIGHT0, GL_DIFFUSE, white);
+      glEnable(GL_LIGHT0);
+   }
+
+   /* fitering = nearest, initially */
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
+   glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
+
+   glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
+   glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
+
+   if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
+      printf("Error: couldn't load texture image\n");
+      exit(1);
+   }
+
+   glEnable(GL_CULL_FACE);  /* don't need Z testing for convex objects */
+
+   SetMode(LIT);
+
+   if (argc > 1 && strcmp(argv[1], "-info")==0) {
+      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+   }
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowSize( 400, 400 );
+   glutInitWindowPosition( 0, 0 );
+
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+
+   glutCreateWindow(argv[0] );
+
+   Init(argc, argv);
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+   glutIdleFunc( Idle );
+
+   glutCreateMenu(ModeMenu);
+   glutAddMenuEntry("Lit", LIT);
+   glutAddMenuEntry("Textured", TEXTURED);
+   glutAddMenuEntry("Reflect", REFLECT);
+   glutAddMenuEntry("Point Filtered", POINT_FILTER);
+   glutAddMenuEntry("Linear Filtered", LINEAR_FILTER);
+   glutAddMenuEntry("Toggle Animation", ANIMATE);
+   glutAddMenuEntry("Quit", QUIT);
+   glutAttachMenu(GLUT_RIGHT_BUTTON);
+
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/texdown.c b/progs/demos/texdown.c
new file mode 100644
index 000000000..79525a039
--- /dev/null
+++ b/progs/demos/texdown.c
@@ -0,0 +1,403 @@
+
+/*
+ * Copyright (C) 1999  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * texdown
+ *
+ * Measure texture download speed.
+ * Use keyboard to change texture size, format, datatype, scale/bias,
+ * subimageload, etc.
+ *
+ * Brian Paul  28 January 2000
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+
+
+static GLsizei MaxSize = 1024;
+static GLsizei TexWidth = 256, TexHeight = 256, TexBorder = 0;
+static GLboolean ScaleAndBias = GL_FALSE;
+static GLboolean SubImage = GL_FALSE;
+static GLdouble DownloadRate = 0.0;  /* texels/sec */
+
+static GLuint Mode = 0;
+
+
+struct FormatRec {
+   GLenum Format;
+   GLenum Type;
+   GLenum IntFormat;
+   GLint TexelSize;
+};
+
+
+static const struct FormatRec FormatTable[] = {
+  /* Format   Type                         IntFormat   TexelSize */
+   { GL_BGRA, GL_UNSIGNED_BYTE,            GL_RGBA,        4    },
+   { GL_RGB,  GL_UNSIGNED_BYTE,            GL_RGB,         3    },
+   { GL_RGBA, GL_UNSIGNED_BYTE,            GL_RGBA,        4    },
+   { GL_RGBA, GL_UNSIGNED_BYTE,            GL_RGB,         4    },
+   { GL_RGB,  GL_UNSIGNED_SHORT_5_6_5,     GL_RGB,         2    },
+   { GL_LUMINANCE, GL_UNSIGNED_BYTE,       GL_LUMINANCE,   1    },
+   { GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, GL_LUMINANCE_ALPHA,   2    },
+   { GL_ALPHA, GL_UNSIGNED_BYTE,           GL_ALPHA,       1    },
+};
+static GLint Format;
+
+#define NUM_FORMATS (sizeof(FormatTable)/sizeof(FormatTable[0]))
+
+static int
+BytesPerTexel(GLint format)
+{
+   return FormatTable[format].TexelSize;
+}
+
+
+static const char *
+FormatStr(GLenum format)
+{
+   switch (format) {
+      case GL_RGB:
+         return "GL_RGB";
+      case GL_RGBA:
+         return "GL_RGBA";
+      case GL_BGRA:
+         return "GL_BGRA";
+      case GL_LUMINANCE:
+         return "GL_LUMINANCE";
+      case GL_LUMINANCE_ALPHA:
+         return "GL_LUMINANCE_ALPHA";
+      case GL_ALPHA:
+         return "GL_ALPHA";
+      default:
+         return "";
+   }
+}
+
+
+static const char *
+TypeStr(GLenum type)
+{
+   switch (type) {
+      case GL_UNSIGNED_BYTE:
+         return "GL_UNSIGNED_BYTE";
+      case GL_UNSIGNED_SHORT:
+         return "GL_UNSIGNED_SHORT";
+      case GL_UNSIGNED_SHORT_5_6_5:
+         return "GL_UNSIGNED_SHORT_5_6_5";
+      case GL_UNSIGNED_SHORT_5_6_5_REV:
+         return "GL_UNSIGNED_SHORT_5_6_5_REV";
+      default:
+         return "";
+   }
+}
+
+
+static void
+MeasureDownloadRate(void)
+{
+   const int w = TexWidth + 2 * TexBorder;
+   const int h = TexHeight + 2 * TexBorder;
+   const int bytes = w * h * BytesPerTexel(Format);
+   GLubyte *texImage, *getImage;
+   GLdouble t0, t1, time;
+   int count;
+   int i;
+
+   texImage = (GLubyte *) malloc(bytes);
+   getImage = (GLubyte *) malloc(bytes);
+   if (!texImage || !getImage) {
+      DownloadRate = 0.0;
+      return;
+   }
+
+   for (i = 0; i < bytes; i++) {
+      texImage[i] = i & 0xff;
+   }
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   glPixelStorei(GL_PACK_ALIGNMENT, 1);
+
+   if (ScaleAndBias) {
+      glPixelTransferf(GL_RED_SCALE, 0.5);
+      glPixelTransferf(GL_GREEN_SCALE, 0.5);
+      glPixelTransferf(GL_BLUE_SCALE, 0.5);
+      glPixelTransferf(GL_RED_BIAS, 0.5);
+      glPixelTransferf(GL_GREEN_BIAS, 0.5);
+      glPixelTransferf(GL_BLUE_BIAS, 0.5);
+   }
+   else {
+      glPixelTransferf(GL_RED_SCALE, 1.0);
+      glPixelTransferf(GL_GREEN_SCALE, 1.0);
+      glPixelTransferf(GL_BLUE_SCALE, 1.0);
+      glPixelTransferf(GL_RED_BIAS, 0.0);
+      glPixelTransferf(GL_GREEN_BIAS, 0.0);
+      glPixelTransferf(GL_BLUE_BIAS, 0.0);
+   }
+
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   glEnable(GL_TEXTURE_2D);
+
+   count = 0;
+   t0 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
+   do {
+      if (SubImage && count > 0) {
+         glTexSubImage2D(GL_TEXTURE_2D, 0, -TexBorder, -TexBorder, w, h,
+                         FormatTable[Format].Format,
+                         FormatTable[Format].Type, texImage);
+      }
+      else {
+         glTexImage2D(GL_TEXTURE_2D, 0,
+                      FormatTable[Format].IntFormat, w, h, TexBorder,
+                      FormatTable[Format].Format,
+                      FormatTable[Format].Type, texImage);
+      }
+
+      /* draw a tiny polygon to force texture into texram */
+      glBegin(GL_TRIANGLES);
+      glTexCoord2f(0, 0);     glVertex2f(1, 1);
+      glTexCoord2f(1, 0);     glVertex2f(3, 1);
+      glTexCoord2f(0.5, 1);   glVertex2f(2, 3);
+      glEnd();
+
+      t1 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
+      time = t1 - t0;
+      count++;
+   } while (time < 3.0);
+
+   glDisable(GL_TEXTURE_2D);
+
+   printf("w*h=%d  count=%d  time=%f\n", w*h, count, time);
+   DownloadRate = w * h * count / time;
+
+#if 0
+   if (!ScaleAndBias) {
+      /* verify texture readback */
+      glGetTexImage(GL_TEXTURE_2D, 0,
+                    FormatTable[Format].Format,
+                    FormatTable[Format].Type, getImage);
+      for (i = 0; i < w * h; i++) {
+         if (texImage[i] != getImage[i]) {
+            printf("[%d] %d != %d\n", i, texImage[i], getImage[i]);
+         }
+      }
+   }
+#endif
+
+   free(texImage);
+   free(getImage);
+
+   {
+      GLint err = glGetError();
+      if (err)
+         printf("GL error %d\n", err);
+   }
+}
+
+
+static void
+PrintString(const char *s)
+{
+   while (*s) {
+      glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
+      s++;
+   }
+}
+
+
+static void
+Display(void)
+{
+   const int w = TexWidth + 2 * TexBorder;
+   const int h = TexHeight + 2 * TexBorder;
+   char s[1000];
+
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   glRasterPos2i(10, 80);
+   sprintf(s, "Texture size[cursor]: %d x %d  Border[b]: %d", w, h, TexBorder);
+   PrintString(s);
+
+   glRasterPos2i(10, 65);
+   sprintf(s, "Format[f]: %s  Type: %s  IntFormat: %s",
+           FormatStr(FormatTable[Format].Format),
+           TypeStr(  FormatTable[Format].Type),
+           FormatStr(FormatTable[Format].IntFormat));
+   PrintString(s);
+
+   glRasterPos2i(10, 50);
+   sprintf(s, "Pixel Scale&Bias[p]: %s   TexSubImage[s]: %s",
+           ScaleAndBias ? "Yes" : "No",
+           SubImage ? "Yes" : "No");
+   PrintString(s);
+
+   if (Mode == 0) {
+      glRasterPos2i(200, 10);
+      sprintf(s, "...Measuring...");
+      PrintString(s);
+      glutSwapBuffers();
+      glutPostRedisplay();
+      Mode++;
+   }
+   else if (Mode == 1) {
+      MeasureDownloadRate();
+      glutPostRedisplay();
+      Mode++;
+   }
+   else {
+      /* show results */
+      glRasterPos2i(10, 10);
+      sprintf(s, "Download rate: %g Mtexels/second  %g MB/second",
+              DownloadRate / 1000000.0,
+              DownloadRate * BytesPerTexel(Format) / 1000000.0);
+      PrintString(s);
+      {
+         GLint r, g, b, a, l, i;
+         glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_RED_SIZE, &r);
+         glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_GREEN_SIZE, &g);
+         glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BLUE_SIZE, &b);
+         glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_SIZE, &a);
+         glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_LUMINANCE_SIZE, &l);
+         glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_INTENSITY_SIZE, &i);
+         sprintf(s, "TexelBits: R=%d G=%d B=%d A=%d L=%d I=%d", r, g, b, a, l, i);
+         glRasterPos2i(10, 25);
+         PrintString(s);
+      }
+
+      glutSwapBuffers();
+   }
+}
+
+
+static void
+Reshape(int width, int height)
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho(0, width, 0, height, -1, 1);
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+}
+
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case ' ':
+         Mode = 0;
+         break;
+      case 'b':
+         /* toggle border */
+         TexBorder = 1 - TexBorder;
+         Mode = 0;
+         break;
+      case 'f':
+         /* change format */
+         Format = (Format + 1) % NUM_FORMATS;
+         Mode = 0;
+         break;
+      case 'F':
+         /* change format */
+         Format = (Format - 1) % NUM_FORMATS;
+         Mode = 0;
+         break;
+      case 'p':
+         /* toggle border */
+         ScaleAndBias = !ScaleAndBias;
+         Mode = 0;
+         break;
+      case 's':
+         SubImage = !SubImage;
+         Mode = 0;
+         break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+SpecialKey(int key, int x, int y)
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         if (TexHeight < MaxSize)
+            TexHeight *= 2;
+         break;
+      case GLUT_KEY_DOWN:
+         if (TexHeight > 1)
+            TexHeight /= 2;
+         break;
+      case GLUT_KEY_LEFT:
+         if (TexWidth > 1)
+            TexWidth /= 2;
+         break;
+      case GLUT_KEY_RIGHT:
+         if (TexWidth < MaxSize)
+            TexWidth *= 2;
+         break;
+   }
+   Mode = 0;
+   glutPostRedisplay();
+}
+
+
+static void
+Init(void)
+{
+   printf("GL_VENDOR = %s\n", (const char *) glGetString(GL_VENDOR));
+   printf("GL_VERSION = %s\n", (const char *) glGetString(GL_VERSION));
+   printf("GL_RENDERER = %s\n", (const char *) glGetString(GL_RENDERER));
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 600, 100 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+   glutCreateWindow(argv[0]);
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+   Init();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/texenv.c b/progs/demos/texenv.c
new file mode 100644
index 000000000..590867b49
--- /dev/null
+++ b/progs/demos/texenv.c
@@ -0,0 +1,815 @@
+
+/* Copyright (c) Mark J. Kilgard, 1994. */
+
+/**
+ * (c) Copyright 1993, Silicon Graphics, Inc.
+ * ALL RIGHTS RESERVED
+ * Permission to use, copy, modify, and distribute this software for
+ * any purpose and without fee is hereby granted, provided that the above
+ * copyright notice appear in all copies and that both the copyright notice
+ * and this permission notice appear in supporting documentation, and that
+ * the name of Silicon Graphics, Inc. not be used in advertising
+ * or publicity pertaining to distribution of the software without specific,
+ * written prior permission.
+ *
+ * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
+ * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
+ * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
+ * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
+ * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
+ * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
+ * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
+ * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
+ * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
+ * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * US Government Users Restricted Rights
+ * Use, duplication, or disclosure by the Government is subject to
+ * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
+ * (c)(1)(ii) of the Rights in Technical Data and Computer Software
+ * clause at DFARS 252.227-7013 and/or in similar or successor
+ * clauses in the FAR or the DOD or NASA FAR Supplement.
+ * Unpublished-- rights reserved under the copyright laws of the
+ * United States.  Contractor/manufacturer is Silicon Graphics,
+ * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
+ *
+ * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
+ */
+
+/*
+ * Demonstrates texture environment modes and internal image formats.
+ */
+
+/*
+ * Hacked on, updated by Gareth Hughes <gareth@valinux.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <GL/glut.h>
+
+#undef max
+#undef min
+#define max( a, b )	((a) >= (b) ? (a) : (b))
+#define min( a, b )	((a) <= (b) ? (a) : (b))
+
+GLfloat lightCheck[4] = { 0.7, 0.7, 0.7, 1.0 };
+GLfloat darkCheck[4] = { 0.3, 0.3, 0.3, 1.0 };
+
+GLfloat labelColor0[4] = { 1.0, 1.0, 1.0, 1.0 };
+GLfloat labelColor1[4] = { 1.0, 1.0, 0.4, 1.0 };
+GLfloat *labelInfoColor = labelColor0;
+GLfloat labelLevelColor0[4] = { 0.8, 0.8, 0.1, 1.0 };
+GLfloat labelLevelColor1[4] = { 0.0, 0.0, 0.0, 1.0 };
+
+GLboolean doubleBuffered = GL_TRUE;
+GLboolean drawBackground = GL_FALSE;
+GLboolean drawBlended = GL_TRUE;
+GLboolean drawSmooth = GL_FALSE;
+GLboolean drawTextured = GL_TRUE;
+GLboolean displayLevelInfo = GL_FALSE;
+
+int textureWidth = 64;
+int textureHeight = 64;
+
+int winWidth = 580, winHeight = 720;
+
+struct formatInfo {
+   GLenum	baseFormat;
+   GLenum	internalFormat;
+   char		*name;
+};
+
+#define NUM_LUMINANCE_FORMATS	(sizeof(luminanceFormats) / sizeof(luminanceFormats[0]))
+struct formatInfo luminanceFormats[] =
+{
+   { GL_LUMINANCE, GL_LUMINANCE, "LUMINANCE" },
+   { GL_LUMINANCE, GL_LUMINANCE4, "LUMINANCE4" },
+   { GL_LUMINANCE, GL_LUMINANCE8, "LUMINANCE8" },
+   { GL_LUMINANCE, GL_LUMINANCE12, "LUMINANCE12" },
+   { GL_LUMINANCE, GL_LUMINANCE16, "LUMINANCE16" },
+};
+
+#define NUM_ALPHA_FORMATS	(sizeof(alphaFormats) / sizeof(alphaFormats[0]))
+struct formatInfo alphaFormats[] =
+{
+   { GL_ALPHA, GL_ALPHA, "ALPHA" },
+   { GL_ALPHA, GL_ALPHA4, "ALPHA4" },
+   { GL_ALPHA, GL_ALPHA8, "ALPHA8" },
+   { GL_ALPHA, GL_ALPHA12, "ALPHA12" },
+   { GL_ALPHA, GL_ALPHA16, "ALPHA16" },
+};
+
+#define NUM_INTENSITY_FORMATS	(sizeof(intensityFormats) / sizeof(intensityFormats[0]))
+struct formatInfo intensityFormats[] =
+{
+   { GL_INTENSITY, GL_INTENSITY, "INTENSITY" },
+   { GL_INTENSITY, GL_INTENSITY4, "INTENSITY4" },
+   { GL_INTENSITY, GL_INTENSITY8, "INTENSITY8" },
+   { GL_INTENSITY, GL_INTENSITY12, "INTENSITY12" },
+   { GL_INTENSITY, GL_INTENSITY16, "INTENSITY16" },
+};
+
+#define NUM_LUMINANCE_ALPHA_FORMATS	(sizeof(luminanceAlphaFormats) / sizeof(luminanceAlphaFormats[0]))
+struct formatInfo luminanceAlphaFormats[] =
+{
+   { GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, "LUMINANCE_ALPHA" },
+   { GL_LUMINANCE_ALPHA, GL_LUMINANCE4_ALPHA4, "LUMINANCE4_ALPHA4" },
+   { GL_LUMINANCE_ALPHA, GL_LUMINANCE6_ALPHA2, "LUMINANCE6_ALPHA2" },
+   { GL_LUMINANCE_ALPHA, GL_LUMINANCE8_ALPHA8, "LUMINANCE8_ALPHA8" },
+   { GL_LUMINANCE_ALPHA, GL_LUMINANCE12_ALPHA4, "LUMINANCE12_ALPHA4" },
+   { GL_LUMINANCE_ALPHA, GL_LUMINANCE12_ALPHA12, "LUMINANCE12_ALPHA12" },
+   { GL_LUMINANCE_ALPHA, GL_LUMINANCE16_ALPHA16, "LUMINANCE16_ALPHA16" },
+};
+
+#define NUM_RGB_FORMATS		(sizeof(rgbFormats) / sizeof(rgbFormats[0]))
+struct formatInfo rgbFormats[] =
+{
+   { GL_RGB, GL_RGB, "RGB" },
+   { GL_RGB, GL_R3_G3_B2, "R3_G3_B2" },
+   { GL_RGB, GL_RGB4, "RGB4" },
+   { GL_RGB, GL_RGB5, "RGB5" },
+   { GL_RGB, GL_RGB8, "RGB8" },
+   { GL_RGB, GL_RGB10, "RGB10" },
+   { GL_RGB, GL_RGB12, "RGB12" },
+   { GL_RGB, GL_RGB16, "RGB16" },
+};
+
+#define NUM_RGBA_FORMATS	(sizeof(rgbaFormats) / sizeof(rgbaFormats[0]))
+struct formatInfo rgbaFormats[] =
+{
+   { GL_RGBA, GL_RGBA, "RGBA" },
+   { GL_RGBA, GL_RGBA2, "RGBA2" },
+   { GL_RGBA, GL_RGBA4, "RGBA4" },
+   { GL_RGBA, GL_RGB5_A1, "RGB5_A1" },
+   { GL_RGBA, GL_RGBA8, "RGBA8" },
+   { GL_RGBA, GL_RGB10_A2, "RGB10_A2" },
+   { GL_RGBA, GL_RGBA12, "RGBA12" },
+   { GL_RGBA, GL_RGBA16, "RGBA16" },
+};
+
+struct baseFormatInfo {
+   struct	formatInfo *format;
+   int		current, number;
+};
+
+#define NUM_BASE_FORMATS	(sizeof(baseFormats) / sizeof(baseFormats[0]))
+int baseFormat;
+struct baseFormatInfo baseFormats[] =
+{
+   { luminanceFormats, 0, NUM_LUMINANCE_FORMATS },
+   { alphaFormats, 0, NUM_ALPHA_FORMATS },
+   { intensityFormats, 0, NUM_INTENSITY_FORMATS },
+   { luminanceAlphaFormats, 0, NUM_LUMINANCE_ALPHA_FORMATS },
+   { rgbFormats, 0, NUM_RGB_FORMATS },
+   { rgbaFormats, 0, NUM_RGBA_FORMATS },
+};
+
+#define NUM_ENV_COLORS		(sizeof(envColors) / sizeof(envColors[0]))
+int envColor = 0;
+GLfloat envColors[][4] =
+{
+   { 0.0, 0.0, 0.0, 1.0 },
+   { 1.0, 0.0, 0.0, 1.0 },
+   { 0.0, 1.0, 0.0, 1.0 },
+   { 0.0, 0.0, 1.0, 1.0 },
+   { 1.0, 1.0, 1.0, 1.0 },
+};
+
+struct envModeInfo {
+   GLenum	mode;
+   char		*name;
+};
+
+/* allow for run-time check for GL_EXT_texture_env_add */
+int NUM_ENV_MODES = 5;
+struct envModeInfo envModes[] =
+{
+   { GL_REPLACE, "REPLACE" },
+   { GL_MODULATE, "MODULATE" },
+   { GL_BLEND, "BLEND" },
+   { GL_DECAL, "DECAL" },
+#if GL_EXT_texture_env_add
+   { GL_ADD, "ADD" },
+#endif
+};
+
+static void checkErrors( void )
+{
+   GLenum error;
+
+   while ( (error = glGetError()) != GL_NO_ERROR ) {
+      fprintf( stderr, "Error: %s\n", (char *) gluErrorString( error ) );
+   }
+}
+
+static void drawString( const char *string, GLfloat x, GLfloat y,
+                        const GLfloat color[4] )
+{
+   glColor4fv( color );
+   glRasterPos2f( x, y );
+
+   while ( *string ) {
+      glutBitmapCharacter( GLUT_BITMAP_TIMES_ROMAN_10, *string );
+      string++;
+   }
+}
+
+static void drawStringOutline( const char *string, GLfloat x, GLfloat y,
+			       const GLfloat color[4],
+                               const GLfloat outline[4] )
+{
+   drawString( string, x - 1, y, outline );
+   drawString( string, x + 1, y, outline );
+   drawString( string, x, y - 1, outline );
+   drawString( string, x, y + 1, outline );
+   drawString( string, x, y, color );
+}
+
+static void begin2D( int width, int height )
+{
+   glMatrixMode( GL_PROJECTION );
+
+   glPushMatrix();
+   glLoadIdentity();
+
+   glOrtho( 0, width, 0, height, -1, 1 );
+   glMatrixMode( GL_MODELVIEW );
+
+   glPushMatrix();
+   glLoadIdentity();
+}
+
+static void end2D( void )
+{
+   glMatrixMode( GL_PROJECTION );
+   glPopMatrix();
+   glMatrixMode( GL_MODELVIEW );
+   glPopMatrix();
+}
+
+static void initialize( void )
+{
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+
+   glOrtho( -1.5, 1.5, -1.5, 1.5, -1.5, 1.5 );
+
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+
+   glShadeModel( GL_FLAT );
+}
+
+/* ARGSUSED1 */
+static void keyboard( unsigned char c, int x, int y )
+{
+   switch ( c ) {
+   case 'c':
+      envColor++;
+      envColor = envColor % (int) NUM_ENV_COLORS;
+      break;
+   case 'g':
+      drawBackground = !drawBackground;
+      break;
+   case 'b':
+      drawBlended = !drawBlended;
+      break;
+   case 's':
+      drawSmooth = !drawSmooth;
+      break;
+   case 't':
+      drawTextured = !drawTextured;
+      break;
+   case 'i':
+      displayLevelInfo = !displayLevelInfo;
+      break;
+   case 27:             /* Escape key should force exit. */
+      exit(0);
+      break;
+   default:
+      break;
+   }
+   glutPostRedisplay();
+}
+
+/* ARGSUSED1 */
+static void special( int key, int x, int y )
+{
+   switch ( key ) {
+   case GLUT_KEY_DOWN:
+      if ( ++baseFormat > NUM_BASE_FORMATS - 1 ) {
+	 baseFormat = 0;
+      }
+      break;
+   case GLUT_KEY_UP:
+      if ( --baseFormat < 0 ) {
+	 baseFormat = NUM_BASE_FORMATS - 1;
+      }
+      break;
+   case GLUT_KEY_LEFT:
+      --baseFormats[baseFormat].current;
+      if ( baseFormats[baseFormat].current < 0 ) {
+	 baseFormats[baseFormat].current = baseFormats[baseFormat].number - 1;
+      }
+      break;
+   case GLUT_KEY_RIGHT:
+      ++baseFormats[baseFormat].current;
+      if ( baseFormats[baseFormat].current > baseFormats[baseFormat].number - 1 ) {
+	 baseFormats[baseFormat].current = 0;
+      }
+      break;
+   default:
+      break;
+   }
+   glutPostRedisplay();
+}
+
+static void
+reshape( int w, int h )
+{
+   winWidth = w;
+   winHeight = h;
+   /* No need to call glViewPort here since "draw" calls it! */
+}
+
+static void loadTexture( int width, int height,
+                         const struct formatInfo *format )
+{
+   int		luminanceSize = 0;
+   int		alphaSize = 0;
+   int		rgbSize = 0;
+   GLenum	textureFormat;
+   GLubyte	*texImage, *p;
+   int		elementsPerGroup, elementSize, groupSize, rowSize;
+   int		i, j;
+
+   switch ( format->baseFormat ) {
+   case GL_LUMINANCE:
+      luminanceSize = 1;
+      textureFormat = GL_LUMINANCE;
+      break;
+   case GL_INTENSITY:
+      luminanceSize = 1;
+      /* Note: format=GL_INTENSITY for glTexImage is not legal */
+      textureFormat = GL_LUMINANCE;
+      break;
+   case GL_ALPHA:
+      alphaSize = 1;
+      textureFormat = GL_ALPHA;
+      break;
+   case GL_LUMINANCE_ALPHA:
+      luminanceSize = 1;
+      alphaSize = 1;
+      textureFormat = GL_LUMINANCE_ALPHA;
+      break;
+   case GL_RGB:
+      rgbSize = 3;
+      textureFormat = GL_RGB;
+      break;
+   case GL_RGBA:
+      rgbSize = 3;
+      alphaSize = 1;
+      textureFormat = GL_RGBA;
+      break;
+   default:
+      fprintf(stderr, "bad internal format info\n");
+      return;
+   }
+
+   elementsPerGroup = luminanceSize + alphaSize + rgbSize;
+   elementSize = sizeof(GLubyte);
+   groupSize = elementsPerGroup * elementSize;
+   rowSize = width * groupSize;
+
+   if ( (texImage = (GLubyte *) malloc( height * rowSize ) ) == NULL ) {
+      fprintf( stderr, "texture malloc failed\n" );
+      return;
+   }
+
+   for ( i = 0 ; i < height ; i++ )
+   {
+      p = texImage + i * rowSize;
+
+      for ( j = 0 ; j < width ; j++ )
+      {
+	 if ( luminanceSize > 0 )
+	 {
+	    /**
+	     ** +-----+-----+
+	     ** |     |     |
+	     ** |  W  | LG  |
+	     ** |     |     |
+	     ** +-----+-----+
+	     ** |     |     |
+	     ** | DG  |  B  |
+	     ** |     |     |
+	     ** +-----+-----+
+	     **/
+	    if ( i > height / 2 ) {
+	       if ( j < width / 2 ) {
+		  p[0] = 0xff;
+	       } else {
+		  p[0] = 0xaa;
+	       }
+	    } else {
+	       if ( j < width / 2 ) {
+		  p[0] = 0x55;
+	       } else {
+		  p[0] = 0x00;
+	       }
+	    }
+	    p += elementSize;
+	 }
+
+	 if ( rgbSize > 0 )
+	 {
+	    /**
+	     ** +-----+-----+
+	     ** |     |     |
+	     ** |  R  |  G  |
+	     ** |     |     |
+	     ** +-----+-----+
+	     ** |     |     |
+	     ** |  Y  |  B  |
+	     ** |     |     |
+	     ** +-----+-----+
+	     **/
+	    if ( i > height / 2 ) {
+	       if ( j < width / 2 ) {
+		  p[0] = 0xff;
+		  p[1] = 0x00;
+		  p[2] = 0x00;
+	       } else {
+		  p[0] = 0x00;
+		  p[1] = 0xff;
+		  p[2] = 0x00;
+	       }
+	    } else {
+	       if ( j < width / 2 ) {
+		  p[0] = 0xff;
+		  p[1] = 0xff;
+		  p[2] = 0x00;
+	       } else {
+		  p[0] = 0x00;
+		  p[1] = 0x00;
+		  p[2] = 0xff;
+	       }
+	    }
+	    p += 3 * elementSize;
+	 }
+
+	 if ( alphaSize > 0 )
+	 {
+	    /**
+	     ** +-----------+
+	     ** |     W     |
+	     ** |  +-----+  |
+	     ** |  |     |  |
+	     ** |  |  B  |  |
+	     ** |  |     |  |
+	     ** |  +-----+  |
+	     ** |           |
+	     ** +-----------+
+	     **/
+	    int i2 = i - height / 2;
+	    int j2 = j - width / 2;
+	    int h8 = height / 8;
+	    int w8 = width / 8;
+	    if ( -h8 <= i2 && i2 <= h8 && -w8 <= j2 && j2 <= w8 ) {
+	       p[0] = 0x00;
+	    } else if ( -2 * h8 <= i2 && i2 <= 2 * h8 && -2 * w8 <= j2 && j2 <= 2 * w8 ) {
+	       p[0] = 0x55;
+	    } else if ( -3 * h8 <= i2 && i2 <= 3 * h8 && -3 * w8 <= j2 && j2 <= 3 * w8 ) {
+	       p[0] = 0xaa;
+	    } else {
+	       p[0] = 0xff;
+	    }
+	    p += elementSize;
+	 }
+      }
+   }
+
+   glTexImage2D( GL_TEXTURE_2D, 0,
+		 format->internalFormat, width, height, 0,
+		 textureFormat, GL_UNSIGNED_BYTE, texImage );
+
+   free( texImage );
+}
+
+static void drawCheck( int w, int h, const GLfloat lightCheck[4],
+                       const GLfloat darkCheck[4] )
+{
+   float	dw = 2.0 / w;
+   float	dh = 2.0 / h;
+   int		i, j;
+
+   for ( i = 0 ; i < w ; i++ ) {
+      GLfloat x0 = -1.0 + i * dw;
+      GLfloat x1 = x0 + dw;
+
+      glBegin( GL_QUAD_STRIP );
+
+      for ( j = 0 ; j <= h ; j++ ) {
+	 GLfloat y = -1.0 + j * dh;
+
+	 if ( (i ^ j) & 1 ) {
+	    glColor4fv( lightCheck );
+	 } else {
+	    glColor4fv( darkCheck );
+	 }
+
+	 glVertex2f( x0, y );
+	 glVertex2f( x1, y );
+      }
+
+      glEnd();
+   }
+}
+
+static const char *lookupFormat( GLint format )
+{
+   switch ( format ) {
+   case GL_RGBA:
+      return "GL_RGBA";
+   case GL_RGB:
+      return "GL_RGB";
+   case GL_ALPHA:
+      return "GL_ALPHA";
+   case GL_LUMINANCE:
+      return "GL_LUMINANCE";
+   case GL_LUMINANCE_ALPHA:
+      return "GL_LUMINANCE_ALPHA";
+   case GL_INTENSITY:
+      return "GL_INTENSITY";
+   case GL_COLOR_INDEX:
+      return "GL_COLOR_INDEX";
+   case GL_BGRA:
+      return "GL_BGRA";
+   case GL_BGR:
+      return "GL_BGR";
+   default:
+      return "unknown format";
+   }
+}
+
+static void drawSample( int x, int y, int w, int h,
+			const struct formatInfo *format,
+                        const struct envModeInfo *envMode )
+{
+   glViewport( x, y, w, h );
+   glScissor( x, y, w, h );
+
+   glClearColor( 0.1, 0.1, 0.1, 1.0 );
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   begin2D( w, h );
+   drawString( format->name, 10, h - 15, labelInfoColor );
+   drawString( envMode->name, 10, 5, labelInfoColor );
+   end2D();
+
+   glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, envMode->mode );
+   glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, envColors[envColor] );
+
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
+
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );
+
+   loadTexture( textureWidth, textureHeight, format );
+
+   if ( drawBackground ) {
+      drawCheck( 15, 15, lightCheck, darkCheck );
+   }
+   if ( drawBlended ) {
+      glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
+      glEnable( GL_BLEND );
+   }
+   if ( drawSmooth ) {
+      glShadeModel( GL_SMOOTH );
+   }
+   else {
+      glShadeModel( GL_FLAT );
+      glColor4f(1, 1, 1, 1);
+   }
+   if ( drawTextured ) {
+      glEnable( GL_TEXTURE_2D );
+   }
+
+   /*
+    * if (drawSmooth) then draw quad which goes from purple at the
+    * bottom (100% alpha) to green at the top (50% alpha).
+    */
+   glBegin( GL_QUADS );
+      if ( drawSmooth )  glColor4f( 1.0, 0.0, 1.0, 1.0 );
+      glTexCoord2f( 0.0, 0.0 );
+      glVertex2f( -0.8, -0.8 );
+
+      if ( drawSmooth )  glColor4f( 1.0, 0.0, 1.0, 1.0 );
+      glTexCoord2f( 1.0, 0.0 );
+      glVertex2f( 0.8, -0.8 );
+
+      if ( drawSmooth )  glColor4f( 0.0, 1.0, 0.0, 0.5 );
+      glTexCoord2f( 1.0, 1.0 );
+      glVertex2f( 0.8, 0.8 );
+
+      if ( drawSmooth )  glColor4f( 0.0, 1.0, 0.0, 0.5 );
+      glTexCoord2f( 0.0, 1.0 );
+      glVertex2f( -0.8, 0.8 );
+   glEnd();
+
+   glDisable( GL_BLEND );
+   glShadeModel( GL_FLAT );
+   glDisable( GL_TEXTURE_2D );
+
+   if ( envMode->mode == GL_DECAL &&
+        (format->baseFormat == GL_ALPHA ||
+         format->baseFormat == GL_LUMINANCE ||
+         format->baseFormat == GL_LUMINANCE_ALPHA ||
+         format->baseFormat == GL_INTENSITY)) {
+      /* undefined format/mode combination */
+      begin2D( w, h );
+      drawStringOutline( "UNDEFINED MODE", 15, h / 2,
+                         labelLevelColor0, labelLevelColor1 );
+      end2D();
+   }
+   else if ( displayLevelInfo ) {
+      GLint width, height, border, format;
+      GLint redSize, greenSize, blueSize, alphaSize;
+      GLint luminanceSize, intensitySize;
+      char buf[255];
+
+      glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width );
+      glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &height );
+      glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER, &border );
+      glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &format );
+      glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_RED_SIZE, &redSize );
+      glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_GREEN_SIZE, &greenSize );
+      glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_BLUE_SIZE, &blueSize );
+      glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_SIZE, &alphaSize );
+      glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_LUMINANCE_SIZE, &luminanceSize );
+      glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_INTENSITY_SIZE, &intensitySize );
+
+      begin2D( w, h );
+      sprintf( buf, "dimensions: %d x %d", width, height );
+      drawStringOutline( buf, 15, h / 2 + 20, labelLevelColor0, labelLevelColor1 );
+
+      sprintf( buf, "border: %d", border );
+      drawStringOutline( buf, 15, h / 2 + 10, labelLevelColor0, labelLevelColor1 );
+
+      sprintf( buf, "internal format:" );
+      drawStringOutline( buf, 15, h / 2, labelLevelColor0, labelLevelColor1 );
+
+      sprintf( buf, "  %s",  lookupFormat( format ) );
+      drawStringOutline( buf, 15, h / 2 - 10, labelLevelColor0, labelLevelColor1 );
+
+      sprintf( buf, "sizes:" );
+      drawStringOutline( buf, 15, h / 2 - 20, labelLevelColor0, labelLevelColor1 );
+
+      sprintf( buf, "  %d / %d / %d / %d / %d / %d",
+	       redSize, greenSize, blueSize, alphaSize,
+	       luminanceSize, intensitySize );
+      drawStringOutline( buf, 15, h / 2 - 30, labelLevelColor0, labelLevelColor1 );
+
+      end2D();
+   }
+}
+
+static void display( void )
+{
+   int		numX = NUM_ENV_MODES, numY = NUM_BASE_FORMATS;
+   float	xBase = (float) winWidth * 0.01;
+   float	xOffset = (winWidth - xBase) / numX;
+   float	xSize = max( xOffset - xBase, 1 );
+   float	yBase = (float) winHeight * 0.01;
+   float	yOffset = (winHeight - yBase) / numY;
+   float	ySize = max( yOffset - yBase, 1 );
+   float	x, y;
+   int		i, j;
+
+   glViewport( 0, 0, winWidth, winHeight );
+   glDisable( GL_SCISSOR_TEST );
+   glClearColor( 0.0, 0.0, 0.0, 0.0 );
+   glClear( GL_COLOR_BUFFER_BIT );
+   glEnable( GL_SCISSOR_TEST );
+
+   x = xBase;
+   y = (winHeight - 1) - yOffset;
+
+   for ( i = 0 ; i < NUM_BASE_FORMATS ; i++ )
+   {
+      struct formatInfo *format;
+
+      if ( i == baseFormat ) {
+	 labelInfoColor = labelColor1;
+      } else {
+	 labelInfoColor = labelColor0;
+      }
+
+      format = &baseFormats[i].format[baseFormats[i].current];
+
+      for ( j = 0 ; j < NUM_ENV_MODES ; j++ ) {
+	 struct envModeInfo *envMode;
+
+	 envMode = &envModes[j];
+	 drawSample( x, y, xSize, ySize, format, envMode );
+	 x += xOffset;
+      }
+
+      x = xBase;
+      y -= yOffset;
+   }
+
+   if ( doubleBuffered ) {
+      glutSwapBuffers();
+   } else {
+      glFlush();
+   }
+
+   checkErrors();
+}
+
+static void usage( char *name )
+{
+   fprintf( stderr, "usage: %s [ options ]\n", name );
+   fprintf( stderr, "\n" );
+   fprintf( stderr, "options:\n" );
+   fprintf( stderr, "    -sb    single buffered\n" );
+   fprintf( stderr, "    -db    double buffered\n" );
+   fprintf( stderr, "    -info  print OpenGL driver info\n" );
+}
+
+static void instructions( void )
+{
+   fprintf( stderr, "texenv - texture environment and internal format test\n" );
+   fprintf( stderr, "\n" );
+   fprintf( stderr, "  [c] - cycle through background colors\n" );
+   fprintf( stderr, "  [g] - toggle background\n" );
+   fprintf( stderr, "  [b] - toggle blend\n" );
+   fprintf( stderr, "  [s] - toggle smooth shading\n" );
+   fprintf( stderr, "  [t] - toggle texturing\n" );
+   fprintf( stderr, "  [i] - toggle information display\n" );
+   fprintf( stderr, "  up/down - select row\n" );
+   fprintf( stderr, "  left/right - change row's internal format\n" );
+}
+
+int main( int argc, char *argv[] )
+{
+   GLboolean info = GL_FALSE;
+   int i;
+
+   glutInit( &argc, argv );
+
+   for ( i = 1 ; i < argc ; i++ ) {
+      if ( !strcmp( "-sb", argv[i] ) ) {
+	 doubleBuffered = GL_FALSE;
+      } else if ( !strcmp( "-db", argv[i] ) ) {
+	 doubleBuffered = GL_TRUE;
+      } else if ( !strcmp( "-info", argv[i] ) ) {
+	 info = GL_TRUE;
+      } else {
+	 usage( argv[0] );
+	 exit( 1 );
+      }
+   }
+
+   if ( doubleBuffered ) {
+      glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+   } else {
+      glutInitDisplayMode( GLUT_RGB | GLUT_SINGLE );
+   }
+
+   glutInitWindowSize( winWidth, winHeight );
+   glutInitWindowPosition( 0, 0 );
+   glutCreateWindow( "Texture Environment Test" );
+
+   initialize();
+   instructions();
+
+   if ( info ) {
+      printf( "\n" );
+      printf( "GL_RENDERER   = %s\n", (char *) glGetString( GL_RENDERER ) );
+      printf( "GL_VERSION    = %s\n", (char *) glGetString( GL_VERSION ) );
+      printf( "GL_VENDOR     = %s\n", (char *) glGetString( GL_VENDOR ) ) ;
+      printf( "GL_EXTENSIONS = %s\n", (char *) glGetString( GL_EXTENSIONS ) );
+   }
+
+#if GL_EXT_texture_env_add
+   if ( !glutExtensionSupported( "GL_EXT_texture_env_add" ) ) {
+      fprintf( stderr, "missing extension: GL_EXT_texture_env_add\n" );
+      NUM_ENV_MODES--;
+   }
+#endif
+
+   glutDisplayFunc( display );
+   glutReshapeFunc( reshape );
+   glutKeyboardFunc( keyboard );
+   glutSpecialFunc( special );
+   glutMainLoop();
+
+   return 0;
+}
diff --git a/progs/demos/texobj.c b/progs/demos/texobj.c
new file mode 100644
index 000000000..40bce6e56
--- /dev/null
+++ b/progs/demos/texobj.c
@@ -0,0 +1,284 @@
+
+/*
+ * Example of using the 1.1 texture object functions.
+ * Also, this demo utilizes Mesa's fast texture map path.
+ *
+ * Brian Paul   June 1996   This file is in the public domain.
+ */
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "GL/glut.h"
+
+static GLuint Window = 0;
+
+static GLuint TexObj[2];
+static GLfloat Angle = 0.0f;
+static GLboolean UseObj = GL_FALSE;
+
+
+#if defined(GL_VERSION_1_1) || defined(GL_VERSION_1_2)
+#  define TEXTURE_OBJECT 1
+#elif defined(GL_EXT_texture_object)
+#  define TEXTURE_OBJECT 1
+#  define glBindTexture(A,B)     glBindTextureEXT(A,B)
+#  define glGenTextures(A,B)     glGenTexturesEXT(A,B)
+#  define glDeleteTextures(A,B)  glDeleteTexturesEXT(A,B)
+#endif
+
+
+
+
+static void draw( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glColor3f( 1.0, 1.0, 1.0 );
+
+   /* draw first polygon */
+   glPushMatrix();
+   glTranslatef( -1.0, 0.0, 0.0 );
+   glRotatef( Angle, 0.0, 0.0, 1.0 );
+   if (UseObj) {
+#ifdef TEXTURE_OBJECT
+      glBindTexture( GL_TEXTURE_2D, TexObj[0] );
+#endif
+   }
+   else {
+      glCallList( TexObj[0] );
+   }
+   glBegin( GL_POLYGON );
+   glTexCoord2f( 0.0, 0.0 );   glVertex2f( -1.0, -1.0 );
+   glTexCoord2f( 1.0, 0.0 );   glVertex2f(  1.0, -1.0 );
+   glTexCoord2f( 1.0, 1.0 );   glVertex2f(  1.0,  1.0 );
+   glTexCoord2f( 0.0, 1.0 );   glVertex2f( -1.0,  1.0 );
+   glEnd();
+   glPopMatrix();
+
+   /* draw second polygon */
+   glPushMatrix();
+   glTranslatef( 1.0, 0.0, 0.0 );
+   glRotatef( Angle-90.0, 0.0, 1.0, 0.0 );
+   if (UseObj) {
+#ifdef TEXTURE_OBJECT
+      glBindTexture( GL_TEXTURE_2D, TexObj[1] );
+#endif
+   }
+   else {
+      glCallList( TexObj[1] );
+   }
+   glBegin( GL_POLYGON );
+   glTexCoord2f( 0.0, 0.0 );   glVertex2f( -1.0, -1.0 );
+   glTexCoord2f( 1.0, 0.0 );   glVertex2f(  1.0, -1.0 );
+   glTexCoord2f( 1.0, 1.0 );   glVertex2f(  1.0,  1.0 );
+   glTexCoord2f( 0.0, 1.0 );   glVertex2f( -1.0,  1.0 );
+   glEnd();
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+
+static void idle( void )
+{
+   static double t0 = -1.;
+   double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+   Angle += 120.0*dt;
+   glutPostRedisplay();
+}
+
+
+
+/* change view Angle, exit upon ESC */
+static void key(unsigned char k, int x, int y)
+{
+   (void) x;
+   (void) y;
+   switch (k) {
+      case 27:
+#ifdef TEXTURE_OBJECT
+         glDeleteTextures( 2, TexObj );
+#endif
+         glutDestroyWindow(Window);
+         exit(0);
+   }
+}
+
+
+
+/* new window size or exposure */
+static void reshape( int width, int height )
+{
+   glViewport(0, 0, (GLint)width, (GLint)height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   /*   glOrtho( -3.0, 3.0, -3.0, 3.0, -10.0, 10.0 );*/
+   glFrustum( -2.0, 2.0, -2.0, 2.0, 6.0, 20.0 );
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -8.0 );
+}
+
+
+static void init( void )
+{
+   static int width=8, height=8;
+   static GLubyte tex1[] = {
+     0, 0, 0, 0, 0, 0, 0, 0,
+     0, 0, 0, 0, 1, 0, 0, 0,
+     0, 0, 0, 1, 1, 0, 0, 0,
+     0, 0, 0, 0, 1, 0, 0, 0,
+     0, 0, 0, 0, 1, 0, 0, 0,
+     0, 0, 0, 0, 1, 0, 0, 0,
+     0, 0, 0, 1, 1, 1, 0, 0,
+     0, 0, 0, 0, 0, 0, 0, 0 };
+
+   static GLubyte tex2[] = {
+     0, 0, 0, 0, 0, 0, 0, 0,
+     0, 0, 0, 2, 2, 0, 0, 0,
+     0, 0, 2, 0, 0, 2, 0, 0,
+     0, 0, 0, 0, 0, 2, 0, 0,
+     0, 0, 0, 0, 2, 0, 0, 0,
+     0, 0, 0, 2, 0, 0, 0, 0,
+     0, 0, 2, 2, 2, 2, 0, 0,
+     0, 0, 0, 0, 0, 0, 0, 0 };
+
+   GLubyte tex[64][3];
+   GLint i, j;
+
+
+   glDisable( GL_DITHER );
+
+   /* Setup texturing */
+   glEnable( GL_TEXTURE_2D );
+   glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL );
+   glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST );
+
+
+   /* generate texture object IDs */
+   if (UseObj) {
+#ifdef TEXTURE_OBJECT
+      glGenTextures( 2, TexObj );
+#endif
+   }
+   else {
+      TexObj[0] = glGenLists(2);
+      TexObj[1] = TexObj[0]+1;
+   }
+
+   /* setup first texture object */
+   if (UseObj) {
+#ifdef TEXTURE_OBJECT
+      glBindTexture( GL_TEXTURE_2D, TexObj[0] );
+      assert(glIsTexture(TexObj[0]));
+#endif
+   }
+   else {
+      glNewList( TexObj[0], GL_COMPILE );
+   }
+   /* red on white */
+   for (i=0;i<height;i++) {
+      for (j=0;j<width;j++) {
+         int p = i*width+j;
+         if (tex1[(height-i-1)*width+j]) {
+            tex[p][0] = 255;   tex[p][1] = 0;     tex[p][2] = 0;
+         }
+         else {
+            tex[p][0] = 255;   tex[p][1] = 255;   tex[p][2] = 255;
+         }
+      }
+   }
+
+   glTexImage2D( GL_TEXTURE_2D, 0, 3, width, height, 0,
+                 GL_RGB, GL_UNSIGNED_BYTE, tex );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
+   if (!UseObj) {
+      glEndList();
+   }
+   /* end of texture object */
+
+   /* setup second texture object */
+   if (UseObj) {
+#ifdef TEXTURE_OBJECT
+      glBindTexture( GL_TEXTURE_2D, TexObj[1] );
+      assert(glIsTexture(TexObj[1]));
+#endif
+      assert(!glIsTexture(TexObj[1] + 999));
+   }
+   else {
+      glNewList( TexObj[1], GL_COMPILE );
+   }
+   /* green on blue */
+   for (i=0;i<height;i++) {
+      for (j=0;j<width;j++) {
+         int p = i*width+j;
+         if (tex2[(height-i-1)*width+j]) {
+            tex[p][0] = 0;     tex[p][1] = 255;   tex[p][2] = 0;
+         }
+         else {
+            tex[p][0] = 0;     tex[p][1] = 0;     tex[p][2] = 255;
+         }
+      }
+   }
+   glTexImage2D( GL_TEXTURE_2D, 0, 3, width, height, 0,
+                 GL_RGB, GL_UNSIGNED_BYTE, tex );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
+   if (!UseObj) {
+      glEndList();
+   }
+   /* end texture object */
+
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(300, 300);
+   glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
+
+   Window = glutCreateWindow("Texture Objects");
+   if (!Window) {
+      exit(1);
+   }
+
+   /* check that renderer has the GL_EXT_texture_object extension
+    * or supports OpenGL 1.1
+    */
+#ifdef TEXTURE_OBJECT
+   {
+      char *exten = (char *) glGetString( GL_EXTENSIONS );
+      char *version = (char *) glGetString( GL_VERSION );
+      if (   strstr( exten, "GL_EXT_texture_object" )
+          || strncmp( version, "1.1", 3 )==0
+          || strncmp( version, "1.2", 3 )==0 ) {
+         UseObj = GL_TRUE;
+      }
+   }
+#endif
+
+   init();
+
+   glutReshapeFunc( reshape );
+   glutKeyboardFunc( key );
+   glutIdleFunc( idle );
+   glutDisplayFunc( draw );
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/trispd.c b/progs/demos/trispd.c
new file mode 100644
index 000000000..165d088e3
--- /dev/null
+++ b/progs/demos/trispd.c
@@ -0,0 +1,253 @@
+
+/*
+ * Simple GLUT program to measure triangle strip rendering speed.
+ * Brian Paul  February 15, 1997  This file is in the public domain.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <GL/glut.h>
+
+
+static float MinPeriod = 2.0;   /* 2 seconds */
+static float Width = 400.0;
+static float Height = 400.0;
+static int Loops = 1;
+static int Size = 50;
+static int Texture = 0;
+
+
+
+static void Idle( void )
+{
+   glutPostRedisplay();
+}
+
+
+static void Display( void )
+{
+   float x, y;
+   float xStep;
+   float yStep;
+   double t0, t1;
+   double triRate;
+   double pixelRate;
+   int triCount;
+   int i;
+   float red[3] = { 1.0, 0.0, 0.0 };
+   float blue[3] = { 0.0, 0.0, 1.0 };
+
+   xStep = yStep = sqrt( 2.0 * Size );
+
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   triCount = 0;
+   t0 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
+   if (Texture) {
+      float uStep = xStep / Width;
+      float vStep = yStep / Height;
+      float u, v;
+      for (i=0; i<Loops; i++) {
+	 for (y=1.0, v=0.0f; y<Height-yStep; y+=yStep, v+=vStep) {
+	    glBegin(GL_TRIANGLE_STRIP);
+	    for (x=1.0, u=0.0f; x<Width; x+=xStep, u+=uStep) {
+	       glColor3fv(red);
+	       glTexCoord2f(u, v);	    
+	       glVertex2f(x, y);
+	       glColor3fv(blue);
+	       glTexCoord2f(u, v+vStep);
+	       glVertex2f(x, y+yStep);
+	       triCount += 2;
+	    }
+	    glEnd();
+	    triCount -= 2;
+	 }
+      }
+   }
+   else {
+      for (i=0; i<Loops; i++) {
+	 for (y=1.0; y<Height-yStep; y+=yStep) {
+	    glBegin(GL_TRIANGLE_STRIP);
+	    for (x=1.0; x<Width; x+=xStep) {
+	       glColor3fv(red);
+	       glVertex2f(x, y);
+	       glColor3fv(blue);
+	       glVertex2f(x, y+yStep);
+	       triCount += 2;
+	    }
+	    glEnd();
+	    triCount -= 2;
+	 }
+      }
+   }
+   glFinish();
+   t1 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
+   
+   if (t1-t0 < MinPeriod) {
+      /* Next time draw more triangles to get longer elapsed time */
+      Loops *= 2;
+      return;
+   }
+
+   triRate = triCount / (t1-t0);
+   pixelRate = triRate * Size;
+   printf("Rate: %d tri in %gs = %g tri/s  %d pixels/s\n",
+          triCount, t1-t0, triRate, (int)pixelRate);
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   Width = width;
+   Height = height;
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho(0.0, width, 0.0, height, -1.0, 1.0);
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void LoadTex(int comp, int filter)
+{
+   GLubyte *pixels;
+   int x, y;
+   pixels = (GLubyte *) malloc(4*256*256);
+   for (y = 0; y < 256; ++y)
+      for (x = 0; x < 256; ++x) {
+	 pixels[(y*256+x)*4+0] = (int)(128.5 + 127.0 * cos(0.024544 * x));
+	 pixels[(y*256+x)*4+1] = 255;
+	 pixels[(y*256+x)*4+2] = (int)(128.5 + 127.0 * cos(0.024544 * y));
+	 pixels[(y*256+x)*4+3] = 255;
+      }
+   glEnable(GL_TEXTURE_2D);
+   glTexImage2D(GL_TEXTURE_2D, 0, comp, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+   printf("Texture: GL_MODULATE, %d comps, %s\n", comp, filter == GL_NEAREST ? "GL_NEAREST" : "GL_LINEAR");
+}
+
+
+static void Init( int argc, char *argv[] )
+{
+   GLint shade;
+   GLint rBits, gBits, bBits;
+   int filter = GL_NEAREST, comp = 3;
+
+   int i;
+   for (i=1; i<argc; i++) {
+      if (strcmp(argv[i],"-dither")==0)
+         glDisable(GL_DITHER);
+      else if (strcmp(argv[i],"+dither")==0)
+         glEnable(GL_DITHER);
+      else if (strcmp(argv[i],"+smooth")==0)
+         glShadeModel(GL_SMOOTH);
+      else if (strcmp(argv[i],"+flat")==0)
+         glShadeModel(GL_FLAT);
+      else if (strcmp(argv[i],"+depth")==0)
+         glEnable(GL_DEPTH_TEST);
+      else if (strcmp(argv[i],"-depth")==0)
+         glDisable(GL_DEPTH_TEST);
+      else if (strcmp(argv[i],"-size")==0) {
+         Size = atoi(argv[i+1]);
+         i++;
+      }
+      else if (strcmp(argv[i],"-texture")==0)
+	 Texture = 0;
+      else if (strcmp(argv[i],"+texture")==0)
+	 Texture = 1;
+      else if (strcmp(argv[i],"-linear")==0)
+	 filter = GL_NEAREST;
+      else if (strcmp(argv[i],"+linear")==0)
+	 filter = GL_LINEAR;
+      else if (strcmp(argv[i],"-persp")==0)
+	 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
+      else if (strcmp(argv[i],"+persp")==0)
+	 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
+      else if (strcmp(argv[i],"-comp")==0) {
+	 comp = atoi(argv[i+1]);
+	 i++;
+      }
+      else
+         printf("Unknown option: %s\n", argv[i]);
+   }
+
+   glGetIntegerv(GL_SHADE_MODEL, &shade);
+
+   printf("Dither: %s\n", glIsEnabled(GL_DITHER) ? "on" : "off");
+   printf("ShadeModel: %s\n", (shade==GL_FLAT) ? "flat" : "smooth");
+   printf("DepthTest: %s\n", glIsEnabled(GL_DEPTH_TEST) ? "on" : "off");
+   printf("Size: %d pixels\n", Size);
+
+   if (Texture)
+      LoadTex(comp, filter);
+
+   glGetIntegerv(GL_RED_BITS, &rBits);
+   glGetIntegerv(GL_GREEN_BITS, &gBits);
+   glGetIntegerv(GL_BLUE_BITS, &bBits);
+   printf("RedBits: %d  GreenBits: %d  BlueBits: %d\n", rBits, gBits, bBits);
+}
+
+
+static void Help( const char *program )
+{
+   printf("%s options:\n", program);
+   printf("  +/-dither      enable/disable dithering\n");
+   printf("  +/-depth       enable/disable depth test\n");
+   printf("  +flat          flat shading\n");
+   printf("  +smooth        smooth shading\n");
+   printf("  -size pixels   specify pixels/triangle\n");
+   printf("  +/-texture     enable/disable texture\n");
+   printf("  -comp n        texture format\n");
+   printf("  +/-linear      bilinear texture filter\n");
+   printf("  +/-persp       perspective correction hint\n");
+}
+
+
+int main( int argc, char *argv[] )
+{
+   printf("For options:  %s -help\n", argv[0]);
+   glutInit( &argc, argv );
+   glutInitWindowSize( (int) Width, (int) Height );
+   glutInitWindowPosition( 0, 0 );
+
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+
+   glutCreateWindow( argv[0] );
+
+   if (argc==2 && strcmp(argv[1],"-help")==0) {
+      Help(argv[0]);
+      return 0;
+   }
+
+   Init( argc, argv );
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutDisplayFunc( Display );
+   glutIdleFunc( Idle );
+
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/demos/tunnel.c b/progs/demos/tunnel.c
new file mode 100644
index 000000000..6a240580e
--- /dev/null
+++ b/progs/demos/tunnel.c
@@ -0,0 +1,535 @@
+/*
+ * This program is under the GNU GPL.
+ * Use at your own risk.
+ *
+ * written by David Bucciarelli (tech.hmw@plus.it)
+ *            Humanware s.r.l.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+
+#ifdef WIN32
+#include <windows.h>
+#endif
+
+#include <GL/glut.h>
+#include "readtex.h"
+#include "tunneldat.h"
+
+#ifdef XMESA
+#include "GL/xmesa.h"
+static int fullscreen = 1;
+#endif
+
+static int WIDTH = 640;
+static int HEIGHT = 480;
+
+static GLint T0 = 0;
+static GLint Frames = 0;
+static GLint NiceFog = 1;
+
+#define NUMBLOC 5
+
+#ifndef M_PI
+#define M_PI 3.1415926535
+#endif
+
+/*
+extern int striplength_skin_13[];
+extern float stripdata_skin_13[];
+
+extern int striplength_skin_12[];
+extern float stripdata_skin_12[];
+
+extern int striplength_skin_11[];
+extern float stripdata_skin_11[];
+
+extern int striplength_skin_9[];
+extern float stripdata_skin_9[];
+*/
+
+static int win = 0;
+
+static float obs[3] = { 1000.0, 0.0, 2.0 };
+static float dir[3];
+static float v = 30.;
+static float alpha = 90.0;
+static float beta = 90.0;
+
+static int fog = 1;
+static int bfcull = 1;
+static int usetex = 1;
+static int cstrip = 0;
+static int help = 1;
+static int joyavailable = 0;
+static int joyactive = 0;
+
+static GLuint t1id, t2id;
+
+static void
+inittextures(void)
+{
+   glGenTextures(1, &t1id);
+   glBindTexture(GL_TEXTURE_2D, t1id);
+
+   if (!LoadRGBMipmaps("../images/tile.rgb", GL_RGB)) {
+      fprintf(stderr, "Error reading a texture.\n");
+      exit(-1);
+   }
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+		   GL_LINEAR_MIPMAP_NEAREST);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   glGenTextures(1, &t2id);
+   glBindTexture(GL_TEXTURE_2D, t2id);
+
+   if (!LoadRGBMipmaps("../images/bw.rgb", GL_RGB)) {
+      fprintf(stderr, "Error reading a texture.\n");
+      exit(-1);
+   }
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+		   GL_LINEAR_MIPMAP_LINEAR);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+}
+
+static void
+drawobjs(const int *l, const float *f)
+{
+   int mend, j;
+
+   if (cstrip) {
+      float r = 0.33, g = 0.33, b = 0.33;
+
+      for (; (*l) != 0;) {
+	 mend = *l++;
+
+	 r += 0.33;
+	 if (r > 1.0) {
+	    r = 0.33;
+	    g += 0.33;
+	    if (g > 1.0) {
+	       g = 0.33;
+	       b += 0.33;
+	       if (b > 1.0)
+		  b = 0.33;
+	    }
+	 }
+
+	 glColor3f(r, g, b);
+	 glBegin(GL_TRIANGLE_STRIP);
+	 for (j = 0; j < mend; j++) {
+	    f += 4;
+	    glTexCoord2fv(f);
+	    f += 2;
+	    glVertex3fv(f);
+	    f += 3;
+	 }
+	 glEnd();
+      }
+   }
+   else
+      for (; (*l) != 0;) {
+	 mend = *l++;
+
+	 glBegin(GL_TRIANGLE_STRIP);
+	 for (j = 0; j < mend; j++) {
+	    glColor4fv(f);
+	    f += 4;
+	    glTexCoord2fv(f);
+	    f += 2;
+	    glVertex3fv(f);
+	    f += 3;
+	 }
+	 glEnd();
+      }
+}
+
+static void
+calcposobs(void)
+{
+   static double t0 = -1.;
+   double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+
+   dir[0] = sin(alpha * M_PI / 180.0);
+   dir[1] = cos(alpha * M_PI / 180.0) * sin(beta * M_PI / 180.0);
+   dir[2] = cos(beta * M_PI / 180.0);
+
+   if (dir[0] < 1.0e-5 && dir[0] > -1.0e-5)
+      dir[0] = 0;
+   if (dir[1] < 1.0e-5 && dir[1] > -1.0e-5)
+      dir[1] = 0;
+   if (dir[2] < 1.0e-5 && dir[2] > -1.0e-5)
+      dir[2] = 0;
+
+   obs[0] += v * dir[0] * dt;
+   obs[1] += v * dir[1] * dt;
+   obs[2] += v * dir[2] * dt;
+}
+
+static void
+special(int k, int x, int y)
+{
+   switch (k) {
+   case GLUT_KEY_LEFT:
+      alpha -= 2.0;
+      break;
+   case GLUT_KEY_RIGHT:
+      alpha += 2.0;
+      break;
+   case GLUT_KEY_DOWN:
+      beta -= 2.0;
+      break;
+   case GLUT_KEY_UP:
+      beta += 2.0;
+      break;
+   }
+}
+
+static void
+key(unsigned char k, int x, int y)
+{
+   switch (k) {
+   case 27:
+      exit(0);
+      break;
+
+   case 'a':
+      v += 5.;
+      break;
+   case 'z':
+      v -= 5.;
+      break;
+
+#ifdef XMESA
+   case ' ':
+      fullscreen = (!fullscreen);
+      XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
+      break;
+#endif
+   case 'j':
+      joyactive = (!joyactive);
+      break;
+   case 'h':
+      help = (!help);
+      break;
+   case 'f':
+      fog = (!fog);
+      break;
+   case 't':
+      usetex = (!usetex);
+      break;
+   case 'b':
+      if (bfcull) {
+	 glDisable(GL_CULL_FACE);
+	 bfcull = 0;
+      }
+      else {
+	 glEnable(GL_CULL_FACE);
+	 bfcull = 1;
+      }
+      break;
+   case 'm':
+      cstrip = (!cstrip);
+      break;
+
+   case 'd':
+      fprintf(stderr, "Deleting textures...\n");
+      glDeleteTextures(1, &t1id);
+      glDeleteTextures(1, &t2id);
+      fprintf(stderr, "Loading textures...\n");
+      inittextures();
+      fprintf(stderr, "Done.\n");
+      break;
+   case 'n':
+      NiceFog = !NiceFog;
+      printf("NiceFog %d\n", NiceFog);
+      break;
+   }
+   glutPostRedisplay();
+}
+
+static void
+reshape(int w, int h)
+{
+   WIDTH = w;
+   HEIGHT = h;
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluPerspective(80.0, w / (float) h, 1.0, 50.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glViewport(0, 0, w, h);
+}
+
+static void
+printstring(void *font, char *string)
+{
+   int len, i;
+
+   len = (int) strlen(string);
+   for (i = 0; i < len; i++)
+      glutBitmapCharacter(font, string[i]);
+}
+
+static void
+printhelp(void)
+{
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+   glColor4f(0.0, 0.0, 0.0, 0.5);
+   glRecti(40, 40, 600, 440);
+
+   glColor3f(1.0, 0.0, 0.0);
+   glRasterPos2i(300, 420);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Help");
+
+   glRasterPos2i(60, 390);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Toggle Help");
+   glRasterPos2i(60, 360);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Toggle Textures");
+   glRasterPos2i(60, 330);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog");
+   glRasterPos2i(60, 300);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "m - Toggle strips");
+   glRasterPos2i(60, 270);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Toggle Back face culling");
+   glRasterPos2i(60, 240);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate");
+   glRasterPos2i(60, 210);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "a - Increase velocity");
+   glRasterPos2i(60, 180);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "z - Decrease velocity");
+
+   glRasterPos2i(60, 150);
+   if (joyavailable)
+      printstring(GLUT_BITMAP_TIMES_ROMAN_24,
+		  "j - Toggle jostick control (Joystick control available)");
+   else
+      printstring(GLUT_BITMAP_TIMES_ROMAN_24,
+		  "(No Joystick control available)");
+}
+
+static void
+dojoy(void)
+{
+#ifdef WIN32
+   static UINT max[2] = { 0, 0 };
+   static UINT min[2] = { 0xffffffff, 0xffffffff }, center[2];
+   MMRESULT res;
+   JOYINFO joy;
+
+   res = joyGetPos(JOYSTICKID1, &joy);
+
+   if (res == JOYERR_NOERROR) {
+      joyavailable = 1;
+
+      if (max[0] < joy.wXpos)
+	 max[0] = joy.wXpos;
+      if (min[0] > joy.wXpos)
+	 min[0] = joy.wXpos;
+      center[0] = (max[0] + min[0]) / 2;
+
+      if (max[1] < joy.wYpos)
+	 max[1] = joy.wYpos;
+      if (min[1] > joy.wYpos)
+	 min[1] = joy.wYpos;
+      center[1] = (max[1] + min[1]) / 2;
+
+      if (joyactive) {
+	 if (fabs(center[0] - (float) joy.wXpos) > 0.1 * (max[0] - min[0]))
+	    alpha -=
+	       2.0 * (center[0] - (float) joy.wXpos) / (max[0] - min[0]);
+	 if (fabs(center[1] - (float) joy.wYpos) > 0.1 * (max[1] - min[1]))
+	    beta += 2.0 * (center[1] - (float) joy.wYpos) / (max[1] - min[1]);
+
+	 if (joy.wButtons & JOY_BUTTON1)
+	    v += 0.01;
+	 if (joy.wButtons & JOY_BUTTON2)
+	    v -= 0.01;
+      }
+   }
+   else
+      joyavailable = 0;
+#endif
+}
+
+static void
+draw(void)
+{
+   static char frbuf[80] = "";
+   int i;
+   float base, offset;
+
+   if (NiceFog)
+      glHint(GL_FOG_HINT, GL_NICEST);
+   else
+      glHint(GL_FOG_HINT, GL_DONT_CARE);
+
+   dojoy();
+
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   if (usetex)
+      glEnable(GL_TEXTURE_2D);
+   else
+      glDisable(GL_TEXTURE_2D);
+
+   if (fog)
+      glEnable(GL_FOG);
+   else
+      glDisable(GL_FOG);
+
+   glShadeModel(GL_SMOOTH);
+
+   glPushMatrix();
+   calcposobs();
+   gluLookAt(obs[0], obs[1], obs[2],
+	     obs[0] + dir[0], obs[1] + dir[1], obs[2] + dir[2],
+	     0.0, 0.0, 1.0);
+
+   if (dir[0] > 0) {
+      offset = 8.0;
+      base = obs[0] - fmod(obs[0], 8.0);
+   }
+   else {
+      offset = -8.0;
+      base = obs[0] + (8.0 - fmod(obs[0], 8.0));
+   }
+
+   glPushMatrix();
+   glTranslatef(base - offset / 2.0, 0.0, 0.0);
+   for (i = 0; i < NUMBLOC; i++) {
+      glTranslatef(offset, 0.0, 0.0);
+      glBindTexture(GL_TEXTURE_2D, t1id);
+      drawobjs(striplength_skin_11, stripdata_skin_11);
+      glBindTexture(GL_TEXTURE_2D, t2id);
+      drawobjs(striplength_skin_12, stripdata_skin_12);
+      drawobjs(striplength_skin_9, stripdata_skin_9);
+      drawobjs(striplength_skin_13, stripdata_skin_13);
+   }
+   glPopMatrix();
+   glPopMatrix();
+
+   glDisable(GL_TEXTURE_2D);
+   glDisable(GL_FOG);
+   glShadeModel(GL_FLAT);
+
+   glMatrixMode(GL_PROJECTION);
+   glPushMatrix();
+   glLoadIdentity();
+   glOrtho(-0.5, 639.5, -0.5, 479.5, -1.0, 1.0);
+
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+
+   glColor3f(1.0, 0.0, 0.0);
+   glRasterPos2i(10, 10);
+   printstring(GLUT_BITMAP_HELVETICA_18, frbuf);
+   glRasterPos2i(350, 470);
+   printstring(GLUT_BITMAP_HELVETICA_10,
+	       "Tunnel V1.5 Written by David Bucciarelli (tech.hmw@plus.it)");
+
+   if (help)
+      printhelp();
+
+   glMatrixMode(GL_PROJECTION);
+   glPopMatrix();
+   glMatrixMode(GL_MODELVIEW);
+
+   glutSwapBuffers();
+
+   Frames++;
+   {
+      GLint t = glutGet(GLUT_ELAPSED_TIME);
+      if (t - T0 >= 2000) {
+         GLfloat seconds = (t - T0) / 1000.0;
+         GLfloat fps = Frames / seconds;
+         sprintf(frbuf, "Frame rate: %f", fps);
+         T0 = t;
+         Frames = 0;
+      }
+   }
+}
+
+static void
+idle(void)
+{
+   glutPostRedisplay();
+}
+
+
+
+int
+main(int ac, char **av)
+{
+   float fogcolor[4] = { 0.7, 0.7, 0.7, 1.0 };
+
+   fprintf(stderr,
+	   "Tunnel V1.5\nWritten by David Bucciarelli (tech.hmw@plus.it)\n");
+
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(WIDTH, HEIGHT);
+   glutInit(&ac, av);
+
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
+
+   if (!(win = glutCreateWindow("Tunnel"))) {
+      fprintf(stderr, "Error, couldn't open window\n");
+      return -1;
+   }
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluPerspective(80.0, WIDTH / (float) HEIGHT, 1.0, 50.0);
+
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_SMOOTH);
+   glDisable(GL_DEPTH_TEST);
+   glEnable(GL_CULL_FACE);
+   glEnable(GL_TEXTURE_2D);
+
+   glEnable(GL_FOG);
+   glFogi(GL_FOG_MODE, GL_EXP2);
+   glFogfv(GL_FOG_COLOR, fogcolor);
+
+   glFogf(GL_FOG_DENSITY, 0.06);
+   glHint(GL_FOG_HINT, GL_NICEST);
+
+   inittextures();
+
+   glClearColor(fogcolor[0], fogcolor[1], fogcolor[2], fogcolor[3]);
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   calcposobs();
+
+   glutReshapeFunc(reshape);
+   glutDisplayFunc(draw);
+   glutKeyboardFunc(key);
+   glutSpecialFunc(special);
+   glutIdleFunc(idle);
+
+   glEnable(GL_BLEND);
+   /*glBlendFunc(GL_SRC_ALPHA_SATURATE,GL_ONE); */
+   /*glEnable(GL_POLYGON_SMOOTH); */
+
+   glutMainLoop();
+
+   return 0;
+}
diff --git a/progs/demos/tunnel2.c b/progs/demos/tunnel2.c
new file mode 100644
index 000000000..75a199af5
--- /dev/null
+++ b/progs/demos/tunnel2.c
@@ -0,0 +1,605 @@
+/*
+ * This program is under the GNU GPL.
+ * Use at your own risk.
+ *
+ * You need TWO Voodoo Graphics boards in order to run
+ * this demo !
+ *
+ * written by David Bucciarelli (tech.hmw@plus.it)
+ *            Humanware s.r.l.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+
+#ifdef WIN32
+#include <windows.h>
+#endif
+
+#include <GL/glut.h>
+#include "readtex.h"
+#include "tunneldat.h"
+
+#ifdef FX
+#endif
+
+#ifdef XMESA
+#include "GL/xmesa.h"
+static int fullscreen = 1;
+#endif
+
+#ifdef FX
+GLint fxMesaSelectCurrentBoard(int);
+#endif
+
+static int WIDTHC0 = 640;
+static int HEIGHTC0 = 480;
+
+static int WIDTHC1 = 640;
+static int HEIGHTC1 = 480;
+
+static GLint T0 = 0;
+static GLint Frames = 0;
+
+#define NUMBLOC 5
+
+#ifndef M_PI
+#define M_PI 3.1415926535
+#endif
+
+static float obs[3] = { 1000.0, 0.0, 2.0 };
+static float dir[3];
+static float v = 30.;
+static float alpha = 90.0;
+static float beta = 90.0;
+
+static int fog = 1;
+static int bfcull = 1;
+static int usetex = 1;
+static int cstrip = 0;
+static int help = 1;
+static int joyavailable = 0;
+static int joyactive = 0;
+
+static int channel[2];
+
+static GLuint t1id, t2id;
+
+static void
+inittextures(void)
+{
+   glGenTextures(1, &t1id);
+   glBindTexture(GL_TEXTURE_2D, t1id);
+
+   if (!LoadRGBMipmaps("../images/tile.rgb", GL_RGB)) {
+      fprintf(stderr, "Error reading a texture.\n");
+      exit(-1);
+   }
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+		   GL_LINEAR_MIPMAP_NEAREST);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   glGenTextures(1, &t2id);
+   glBindTexture(GL_TEXTURE_2D, t2id);
+
+   if (!LoadRGBMipmaps("../images/bw.rgb", GL_RGB)) {
+      fprintf(stderr, "Error reading a texture.\n");
+      exit(-1);
+   }
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+		   GL_LINEAR_MIPMAP_LINEAR);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+}
+
+static void
+drawobjs(const int *l, const float *f)
+{
+   int mend, j;
+
+   if (cstrip) {
+      float r = 0.33, g = 0.33, b = 0.33;
+
+      for (; (*l) != 0;) {
+	 mend = *l++;
+
+	 r += 0.33;
+	 if (r > 1.0) {
+	    r = 0.33;
+	    g += 0.33;
+	    if (g > 1.0) {
+	       g = 0.33;
+	       b += 0.33;
+	       if (b > 1.0)
+		  b = 0.33;
+	    }
+	 }
+
+	 glColor3f(r, g, b);
+	 glBegin(GL_TRIANGLE_STRIP);
+	 for (j = 0; j < mend; j++) {
+	    f += 4;
+	    glTexCoord2fv(f);
+	    f += 2;
+	    glVertex3fv(f);
+	    f += 3;
+	 }
+	 glEnd();
+      }
+   }
+   else
+      for (; (*l) != 0;) {
+	 mend = *l++;
+
+	 glBegin(GL_TRIANGLE_STRIP);
+	 for (j = 0; j < mend; j++) {
+	    glColor4fv(f);
+	    f += 4;
+	    glTexCoord2fv(f);
+	    f += 2;
+	    glVertex3fv(f);
+	    f += 3;
+	 }
+	 glEnd();
+      }
+}
+
+static void
+calcposobs(void)
+{
+   static double t0 = -1.;
+   double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+
+   dir[0] = sin(alpha * M_PI / 180.0);
+   dir[1] = cos(alpha * M_PI / 180.0) * sin(beta * M_PI / 180.0);
+   dir[2] = cos(beta * M_PI / 180.0);
+
+   if (dir[0] < 1.0e-5 && dir[0] > -1.0e-5)
+      dir[0] = 0;
+   if (dir[1] < 1.0e-5 && dir[1] > -1.0e-5)
+      dir[1] = 0;
+   if (dir[2] < 1.0e-5 && dir[2] > -1.0e-5)
+      dir[2] = 0;
+
+   obs[0] += v * dir[0] * dt;
+   obs[1] += v * dir[1] * dt;
+   obs[2] += v * dir[2] * dt;
+}
+
+static void
+special(int k, int x, int y)
+{
+   switch (k) {
+   case GLUT_KEY_LEFT:
+      alpha -= 2.0;
+      break;
+   case GLUT_KEY_RIGHT:
+      alpha += 2.0;
+      break;
+   case GLUT_KEY_DOWN:
+      beta -= 2.0;
+      break;
+   case GLUT_KEY_UP:
+      beta += 2.0;
+      break;
+   }
+}
+
+static void
+key(unsigned char k, int x, int y)
+{
+   switch (k) {
+   case 27:
+      exit(0);
+      break;
+
+   case 'a':
+      v += 5.;
+      break;
+   case 'z':
+      v -= 5.;
+      break;
+
+#ifdef XMESA
+   case ' ':
+      fullscreen = (!fullscreen);
+
+      glutSetWindow(channel[0]);
+      XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
+
+      glutSetWindow(channel[1]);
+      XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
+      break;
+#endif
+
+   case 'j':
+      joyactive = (!joyactive);
+      break;
+   case 'h':
+      help = (!help);
+      break;
+   case 'f':
+      fog = (!fog);
+      break;
+   case 't':
+      usetex = (!usetex);
+      break;
+   case 'b':
+      if (bfcull) {
+	 glDisable(GL_CULL_FACE);
+	 bfcull = 0;
+      }
+      else {
+	 glEnable(GL_CULL_FACE);
+	 bfcull = 1;
+      }
+      break;
+   case 'm':
+      cstrip = (!cstrip);
+      break;
+
+   case 'd':
+      fprintf(stderr, "Deleting textures...\n");
+      glDeleteTextures(1, &t1id);
+      glDeleteTextures(1, &t2id);
+      fprintf(stderr, "Loading textures...\n");
+      inittextures();
+      fprintf(stderr, "Done.\n");
+      break;
+   }
+}
+
+static void
+reshapechannel0(int w, int h)
+{
+   float ratio;
+
+   WIDTHC0 = w;
+   HEIGHTC0 = h;
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+
+   ratio = 0.5f * w / (float) h;
+
+   glFrustum(-2.0, 0.0, -1.0 * ratio, 1.0 * ratio, 1.0, 60.0);
+
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glViewport(0, 0, w, h);
+}
+
+static void
+reshapechannel1(int w, int h)
+{
+   float ratio;
+
+   WIDTHC1 = w;
+   HEIGHTC1 = h;
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+
+   ratio = 0.5f * w / (float) h;
+
+   glFrustum(0.0, 2.0, -1.0 * ratio, 1.0 * ratio, 1.0, 60.0);
+
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glViewport(0, 0, w, h);
+}
+
+static void
+printstring(void *font, char *string)
+{
+   int len, i;
+
+   len = (int) strlen(string);
+   for (i = 0; i < len; i++)
+      glutBitmapCharacter(font, string[i]);
+}
+
+static void
+printhelp(void)
+{
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+   glColor4f(0.0, 0.0, 0.0, 0.5);
+   glRecti(40, 40, 600, 440);
+
+   glColor3f(1.0, 0.0, 0.0);
+   glRasterPos2i(300, 420);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Help");
+
+   glRasterPos2i(60, 390);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Toggle Help");
+   glRasterPos2i(60, 360);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Toggle Textures");
+   glRasterPos2i(60, 330);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog");
+   glRasterPos2i(60, 300);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "m - Toggle strips");
+   glRasterPos2i(60, 270);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Toggle Back face culling");
+   glRasterPos2i(60, 240);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate");
+   glRasterPos2i(60, 210);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "a - Increase velocity");
+   glRasterPos2i(60, 180);
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "z - Decrease velocity");
+
+   glRasterPos2i(60, 150);
+   if (joyavailable)
+      printstring(GLUT_BITMAP_TIMES_ROMAN_24,
+		  "j - Toggle jostick control (Joystick control available)");
+   else
+      printstring(GLUT_BITMAP_TIMES_ROMAN_24,
+		  "(No Joystick control available)");
+}
+
+static void
+dojoy(void)
+{
+#ifdef WIN32
+   static UINT max[2] = { 0, 0 };
+   static UINT min[2] = { 0xffffffff, 0xffffffff }, center[2];
+   MMRESULT res;
+   JOYINFO joy;
+
+   res = joyGetPos(JOYSTICKID1, &joy);
+
+   if (res == JOYERR_NOERROR) {
+      joyavailable = 1;
+
+      if (max[0] < joy.wXpos)
+	 max[0] = joy.wXpos;
+      if (min[0] > joy.wXpos)
+	 min[0] = joy.wXpos;
+      center[0] = (max[0] + min[0]) / 2;
+
+      if (max[1] < joy.wYpos)
+	 max[1] = joy.wYpos;
+      if (min[1] > joy.wYpos)
+	 min[1] = joy.wYpos;
+      center[1] = (max[1] + min[1]) / 2;
+
+      if (joyactive) {
+	 if (fabs(center[0] - (float) joy.wXpos) > 0.1 * (max[0] - min[0]))
+	    alpha -=
+	       2.0 * (center[0] - (float) joy.wXpos) / (max[0] - min[0]);
+	 if (fabs(center[1] - (float) joy.wYpos) > 0.1 * (max[1] - min[1]))
+	    beta += 2.0 * (center[1] - (float) joy.wYpos) / (max[1] - min[1]);
+
+	 if (joy.wButtons & JOY_BUTTON1)
+	    v += 0.01;
+	 if (joy.wButtons & JOY_BUTTON2)
+	    v -= 0.01;
+      }
+   }
+   else
+      joyavailable = 0;
+#endif
+}
+
+static void
+draw(void)
+{
+   static char frbuf[80] = "";
+   int i;
+   float base, offset;
+
+   dojoy();
+
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   if (usetex)
+      glEnable(GL_TEXTURE_2D);
+   else
+      glDisable(GL_TEXTURE_2D);
+
+   if (fog)
+      glEnable(GL_FOG);
+   else
+      glDisable(GL_FOG);
+
+   glShadeModel(GL_SMOOTH);
+
+   glPushMatrix();
+   calcposobs();
+   gluLookAt(obs[0], obs[1], obs[2],
+	     obs[0] + dir[0], obs[1] + dir[1], obs[2] + dir[2],
+	     0.0, 0.0, 1.0);
+
+   if (dir[0] > 0) {
+      offset = 8.0;
+      base = obs[0] - fmod(obs[0], 8.0);
+   }
+   else {
+      offset = -8.0;
+      base = obs[0] + (8.0 - fmod(obs[0], 8.0));
+   }
+
+   glPushMatrix();
+   glTranslatef(base - offset / 2.0, 0.0, 0.0);
+   for (i = 0; i < NUMBLOC; i++) {
+      glTranslatef(offset, 0.0, 0.0);
+      glBindTexture(GL_TEXTURE_2D, t1id);
+      drawobjs(striplength_skin_11, stripdata_skin_11);
+      glBindTexture(GL_TEXTURE_2D, t2id);
+      drawobjs(striplength_skin_12, stripdata_skin_12);
+      drawobjs(striplength_skin_9, stripdata_skin_9);
+      drawobjs(striplength_skin_13, stripdata_skin_13);
+   }
+   glPopMatrix();
+   glPopMatrix();
+
+   glDisable(GL_TEXTURE_2D);
+   glDisable(GL_FOG);
+   glShadeModel(GL_FLAT);
+
+   glMatrixMode(GL_PROJECTION);
+   glPushMatrix();
+   glLoadIdentity();
+   glOrtho(-0.5, 639.5, -0.5, 479.5, -1.0, 1.0);
+
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+
+   glColor3f(1.0, 0.0, 0.0);
+   glRasterPos2i(10, 10);
+   printstring(GLUT_BITMAP_HELVETICA_18, frbuf);
+   glRasterPos2i(350, 470);
+   printstring(GLUT_BITMAP_HELVETICA_10,
+	       "Tunnel2 V1.0 Written by David Bucciarelli (tech.hmw@plus.it)");
+
+   if (help)
+      printhelp();
+
+   glMatrixMode(GL_PROJECTION);
+   glPopMatrix();
+   glMatrixMode(GL_MODELVIEW);
+
+   Frames++;
+   {
+      GLint t = glutGet(GLUT_ELAPSED_TIME);
+      if (t - T0 >= 2000) {
+         GLfloat seconds = (t - T0) / 1000.0;
+         GLfloat fps = Frames / seconds;
+         sprintf(frbuf, "Frame rate: %f", fps);
+         T0 = t;
+         Frames = 0;
+      }
+   }
+}
+
+static void
+drawchannel0(void)
+{
+   glutSetWindow(channel[0]);
+   draw();
+   glutSwapBuffers();
+}
+
+static void
+drawchannel1(void)
+{
+   glutSetWindow(channel[1]);
+   draw();
+   glutSwapBuffers();
+}
+
+static void
+drawall(void)
+{
+   glutSetWindow(channel[0]);
+   draw();
+   glutSetWindow(channel[1]);
+   draw();
+
+   glutSetWindow(channel[0]);
+   glutSwapBuffers();
+   glutSetWindow(channel[1]);
+   glutSwapBuffers();
+}
+
+static void
+init(void)
+{
+   float fogcolor[4] = { 0.7, 0.7, 0.7, 1.0 };
+
+   glShadeModel(GL_SMOOTH);
+   glDisable(GL_DEPTH_TEST);
+   glEnable(GL_CULL_FACE);
+   glEnable(GL_TEXTURE_2D);
+
+   glEnable(GL_FOG);
+   glFogi(GL_FOG_MODE, GL_EXP2);
+   glFogfv(GL_FOG_COLOR, fogcolor);
+
+   glFogf(GL_FOG_DENSITY, 0.06);
+   glHint(GL_FOG_HINT, GL_NICEST);
+
+   glEnable(GL_BLEND);
+   /*
+   glBlendFunc(GL_SRC_ALPHA_SATURATE, GL_ONE);
+   glEnable(GL_POLYGON_SMOOTH);
+   */
+
+   glClearColor(fogcolor[0], fogcolor[1], fogcolor[2], fogcolor[3]);
+   glClear(GL_COLOR_BUFFER_BIT);
+}
+
+int
+main(int ac, char **av)
+{
+   fprintf(stderr,
+	   "Tunnel2 V1.0\nWritten by David Bucciarelli (tech.hmw@plus.it)\n");
+
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(WIDTHC0, HEIGHTC0);
+   glutInit(&ac, av);
+
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
+
+#ifdef FX
+   if (fxMesaSelectCurrentBoard(0) < 0) {
+      fprintf(stderr, "The first Voodoo Graphics board is missing !?!?\n");
+      return -1;
+   }
+#endif
+   if (!(channel[0] = glutCreateWindow("Channel 0"))) {
+      fprintf(stderr, "Error, couldn't open window\n");
+      return -1;
+   }
+
+   reshapechannel0(WIDTHC0, HEIGHTC0);
+   init();
+   inittextures();
+   glutDisplayFunc(drawchannel0);
+   glutReshapeFunc(reshapechannel0);
+   glutKeyboardFunc(key);
+   glutSpecialFunc(special);
+
+#ifdef FX
+   if (fxMesaSelectCurrentBoard(1) < 0) {
+      fprintf(stderr, "The second Voodoo Graphics board is missing !\n");
+      exit(-1);
+   }
+#endif
+   glutInitWindowPosition(WIDTHC0, 0);
+   glutInitWindowSize(WIDTHC1, HEIGHTC1);
+   if (!(channel[1] = glutCreateWindow("Channel 1"))) {
+      fprintf(stderr, "Error, couldn't open window\n");
+      exit(-1);
+   }
+
+   reshapechannel1(WIDTHC1, HEIGHTC1);
+   init();
+   inittextures();
+   glutDisplayFunc(drawchannel1);
+   glutReshapeFunc(reshapechannel1);
+   glutKeyboardFunc(key);
+   glutSpecialFunc(special);
+
+   glutIdleFunc(drawall);
+
+   calcposobs();
+
+   glutMainLoop();
+
+   return 0;
+}
diff --git a/progs/demos/tunneldat.h b/progs/demos/tunneldat.h
new file mode 100644
index 000000000..af1e52e1f
--- /dev/null
+++ b/progs/demos/tunneldat.h
@@ -0,0 +1,395 @@
+/* Object: skin_13 */
+
+#if defined(_MSC_VER) && defined(_WIN32)
+#pragma warning( disable : 4305 )	/* 'initializing' : truncation from 'const double' to 'float' */
+#endif
+
+static const int striplength_skin_13[] = {
+   10, 7, 3, 5, 5, 4, 4, 4, 4, 5, 3, 4, 5, 4, 4, 4, 4, 4, 4, 6,
+   6, 3, 6, 3, 3, 3, 3, 0
+};
+
+static const float stripdata_skin_13[] = {
+   0.415686, 0.415686, 0.415686, 1.000000, 0.000000, 1.500000, 2.000000,
+      4.000000, 0.000000, 0.341176, 0.341176, 0.341176, 1.000000, -0.500000,
+      1.500000, 4.000000, 4.000000, 0.000000, 0.545098, 0.545098, 0.545098,
+      1.000000, 0.000000, 1.000000, 2.000000, 4.000000, 2.000000, 0.435294,
+      0.435294, 0.435294, 1.000000, -0.500000, 1.000000, 4.000000, 4.000000,
+      2.000000, 0.517647, 0.517647, 0.517647, 1.000000, 0.000000, 0.500000,
+      2.000000, 4.000000, 4.000000, 0.450980, 0.450980, 0.450980, 1.000000,
+      -0.500000, 0.500000, 4.000000, 4.000000, 4.000000, 0.427451, 0.427451,
+      0.427451, 1.000000, 0.000000, 0.000000, 2.000000, 4.000000, 6.000000,
+      0.388235, 0.388235, 0.388235, 1.000000, -0.500000, 0.000000, 4.000000,
+      4.000000, 6.000000, 0.356863, 0.356863, 0.356863, 1.000000, 0.000000,
+      -0.500000, 2.000000, 4.000000, 8.000000, 0.333333, 0.333333, 0.333333,
+      1.000000, -0.500000, -0.500000, 4.000000, 4.000000, 8.000000,
+   0.435294, 0.435294, 0.435294, 1.000000, 1.500000, 1.000000, -4.000000,
+      4.000000, 2.000000, 0.415686, 0.415686, 0.415686, 1.000000, 1.000000,
+      1.500000, -2.000000, 4.000000, 0.000000, 0.545098, 0.545098, 0.545098,
+      1.000000, 1.000000, 1.000000, -2.000000, 4.000000, 2.000000, 0.450980,
+      0.450980, 0.450980, 1.000000, 0.500000, 1.500000, 0.000000, 4.000000,
+      0.000000, 0.600000, 0.600000, 0.600000, 1.000000, 0.500000, 1.000000,
+      0.000000, 4.000000, 2.000000, 0.415686, 0.415686, 0.415686, 1.000000,
+      0.000000, 1.500000, 2.000000, 4.000000, 0.000000, 0.545098, 0.545098,
+      0.545098, 1.000000, 0.000000, 1.000000, 2.000000, 4.000000, 2.000000,
+   0.435294, 0.435294, 0.435294, 1.000000, 1.500000, 1.000000, -4.000000,
+      4.000000, 2.000000, 0.341176, 0.341176, 0.341176, 1.000000, 1.500000,
+      1.500000, -4.000000, 4.000000, 0.000000, 0.415686, 0.415686, 0.415686,
+      1.000000, 1.000000, 1.500000, -2.000000, 4.000000, 0.000000,
+   0.356863, 0.356863, 0.356863, 1.000000, 0.000000, -0.500000, 2.000000,
+      4.000000, 8.000000, 0.364706, 0.364706, 0.364706, 1.000000, 0.500000,
+      -0.500000, 0.000000, 4.000000, 8.000000, 0.427451, 0.427451, 0.427451,
+      1.000000, 0.000000, 0.000000, 2.000000, 4.000000, 6.000000, 0.415686,
+      0.415686, 0.415686, 1.000000, 0.395020, -0.133318, 0.420032, 4.000000,
+      6.533272, 0.423529, 0.423529, 0.423529, 1.000000, 0.388550, -0.103582,
+      0.445932, 4.000000, 6.414327,
+   0.423529, 0.423529, 0.423529, 1.000000, 0.388550, -0.103582, 0.445932,
+      4.000000, 6.414327, 0.427451, 0.427451, 0.427451, 1.000000, 0.383423,
+      -0.069344, 0.466541, 4.000000, 6.277375, 0.427451, 0.427451, 0.427451,
+      1.000000, 0.000000, 0.000000, 2.000000, 4.000000, 6.000000, 0.435294,
+      0.435294, 0.435294, 1.000000, 0.380371, -0.034595, 0.478689, 4.000000,
+      6.138380, 0.439216, 0.439216, 0.439216, 1.000000, 0.379272, 0.000000,
+      0.482673, 4.000000, 6.000000,
+   0.407843, 0.407843, 0.407843, 1.000000, 0.414673, -0.191394, 0.341301,
+      4.000000, 6.765576, 0.411765, 0.411765, 0.411765, 1.000000, 0.403687,
+      -0.162957, 0.385368, 4.000000, 6.651829, 0.364706, 0.364706, 0.364706,
+      1.000000, 0.500000, -0.500000, 0.000000, 4.000000, 8.000000, 0.415686,
+      0.415686, 0.415686, 1.000000, 0.395020, -0.133318, 0.420032, 4.000000,
+      6.533272,
+   0.400000, 0.400000, 0.400000, 1.000000, 0.438232, -0.232438, 0.247284,
+      4.000000, 6.929754, 0.403922, 0.403922, 0.403922, 1.000000, 0.425171,
+      -0.212276, 0.299425, 4.000000, 6.849104, 0.364706, 0.364706, 0.364706,
+      1.000000, 0.500000, -0.500000, 0.000000, 4.000000, 8.000000, 0.407843,
+      0.407843, 0.407843, 1.000000, 0.414673, -0.191394, 0.341301, 4.000000,
+      6.765576,
+   0.396078, 0.396078, 0.396078, 1.000000, 0.467285, -0.260554, 0.130636,
+      4.000000, 7.042214, 0.400000, 0.400000, 0.400000, 1.000000, 0.453857,
+      -0.250068, 0.184711, 4.000000, 7.000273, 0.364706, 0.364706, 0.364706,
+      1.000000, 0.500000, -0.500000, 0.000000, 4.000000, 8.000000, 0.400000,
+      0.400000, 0.400000, 1.000000, 0.438232, -0.232438, 0.247284, 4.000000,
+      6.929754,
+   0.396078, 0.396078, 0.396078, 1.000000, 0.500000, -0.270672, 0.000000,
+      4.000000, 7.082688, 0.396078, 0.396078, 0.396078, 1.000000, 0.482788,
+      -0.267902, 0.068730, 4.000000, 7.071609, 0.364706, 0.364706, 0.364706,
+      1.000000, 0.500000, -0.500000, 0.000000, 4.000000, 8.000000, 0.396078,
+      0.396078, 0.396078, 1.000000, 0.467285, -0.260554, 0.130636, 4.000000,
+      7.042214,
+   0.439216, 0.439216, 0.439216, 1.000000, 0.379272, 0.000000, 0.482673,
+      4.000000, 6.000000, 0.474510, 0.474510, 0.474510, 1.000000, 0.379272,
+      0.180448, 0.482673, 4.000000, 5.278208, 0.517647, 0.517647, 0.517647,
+      1.000000, 0.000000, 0.500000, 2.000000, 4.000000, 4.000000, 0.513726,
+      0.513726, 0.513726, 1.000000, 0.379272, 0.360896, 0.482673, 4.000000,
+      4.556417, 0.545098, 0.545098, 0.545098, 1.000000, 0.379272, 0.500000,
+      0.482673, 4.000000, 4.000000,
+   0.545098, 0.545098, 0.545098, 1.000000, 0.379272, 0.500000, 0.482673,
+      4.000000, 4.000000, 0.545098, 0.545098, 0.545098, 1.000000, 0.000000,
+      1.000000, 2.000000, 4.000000, 2.000000, 0.517647, 0.517647, 0.517647,
+      1.000000, 0.000000, 0.500000, 2.000000, 4.000000, 4.000000,
+   0.600000, 0.600000, 0.600000, 1.000000, 0.500000, 1.000000, 0.000000,
+      4.000000, 2.000000, 0.545098, 0.545098, 0.545098, 1.000000, 0.000000,
+      1.000000, 2.000000, 4.000000, 2.000000, 0.552941, 0.552941, 0.552941,
+      1.000000, 0.379272, 0.541344, 0.482673, 4.000000, 3.834625, 0.545098,
+      0.545098, 0.545098, 1.000000, 0.379272, 0.500000, 0.482673, 4.000000,
+      4.000000,
+   0.552941, 0.552941, 0.552941, 1.000000, 0.379272, 0.541344, 0.482673,
+      4.000000, 3.834625, 0.556863, 0.556863, 0.556863, 1.000000, 0.459717,
+      0.541344, 0.160891, 4.000000, 3.834625, 0.600000, 0.600000, 0.600000,
+      1.000000, 0.500000, 1.000000, 0.000000, 4.000000, 2.000000, 0.556863,
+      0.556863, 0.556863, 1.000000, 0.500000, 0.541344, 0.000000, 4.000000,
+      3.834625, 0.556863, 0.556863, 0.556863, 1.000000, 0.540283, 0.541344,
+      -0.160891, 4.000000, 3.834625,
+   0.396078, 0.396078, 0.396078, 1.000000, 0.517212, -0.267902, -0.068730,
+      4.000000, 7.071609, 0.396078, 0.396078, 0.396078, 1.000000, 0.500000,
+      -0.270672, 0.000000, 4.000000, 7.082688, 0.356863, 0.356863, 0.356863,
+      1.000000, 1.000000, -0.500000, -2.000000, 4.000000, 8.000000, 0.364706,
+      0.364706, 0.364706, 1.000000, 0.500000, -0.500000, 0.000000, 4.000000,
+      8.000000,
+   0.400000, 0.400000, 0.400000, 1.000000, 0.546143, -0.250068, -0.184711,
+      4.000000, 7.000273, 0.396078, 0.396078, 0.396078, 1.000000, 0.532715,
+      -0.260554, -0.130636, 4.000000, 7.042214, 0.356863, 0.356863, 0.356863,
+      1.000000, 1.000000, -0.500000, -2.000000, 4.000000, 8.000000, 0.396078,
+      0.396078, 0.396078, 1.000000, 0.517212, -0.267902, -0.068730, 4.000000,
+      7.071609,
+   0.403922, 0.403922, 0.403922, 1.000000, 0.574829, -0.212276, -0.299425,
+      4.000000, 6.849104, 0.400000, 0.400000, 0.400000, 1.000000, 0.561768,
+      -0.232438, -0.247284, 4.000000, 6.929754, 0.356863, 0.356863, 0.356863,
+      1.000000, 1.000000, -0.500000, -2.000000, 4.000000, 8.000000, 0.400000,
+      0.400000, 0.400000, 1.000000, 0.546143, -0.250068, -0.184711, 4.000000,
+      7.000273,
+   0.411765, 0.411765, 0.411765, 1.000000, 0.596313, -0.162957, -0.385368,
+      4.000000, 6.651829, 0.407843, 0.407843, 0.407843, 1.000000, 0.585327,
+      -0.191394, -0.341301, 4.000000, 6.765576, 0.356863, 0.356863, 0.356863,
+      1.000000, 1.000000, -0.500000, -2.000000, 4.000000, 8.000000, 0.403922,
+      0.403922, 0.403922, 1.000000, 0.574829, -0.212276, -0.299425, 4.000000,
+      6.849104,
+   0.423529, 0.423529, 0.423529, 1.000000, 0.611450, -0.103582, -0.445931,
+      4.000000, 6.414327, 0.415686, 0.415686, 0.415686, 1.000000, 0.604980,
+      -0.133318, -0.420033, 4.000000, 6.533272, 0.356863, 0.356863, 0.356863,
+      1.000000, 1.000000, -0.500000, -2.000000, 4.000000, 8.000000, 0.411765,
+      0.411765, 0.411765, 1.000000, 0.596313, -0.162957, -0.385368, 4.000000,
+      6.651829,
+   0.435294, 0.435294, 0.435294, 1.000000, 0.619629, -0.034595, -0.478689,
+      4.000000, 6.138380, 0.427451, 0.427451, 0.427451, 1.000000, 0.616577,
+      -0.069344, -0.466541, 4.000000, 6.277375, 0.356863, 0.356863, 0.356863,
+      1.000000, 1.000000, -0.500000, -2.000000, 4.000000, 8.000000, 0.423529,
+      0.423529, 0.423529, 1.000000, 0.611450, -0.103582, -0.445931, 4.000000,
+      6.414327,
+   0.513726, 0.513726, 0.513726, 1.000000, 0.620728, 0.360896, -0.482673,
+      4.000000, 4.556417, 0.474510, 0.474510, 0.474510, 1.000000, 0.620728,
+      0.180448, -0.482673, 4.000000, 5.278208, 0.427451, 0.427451, 0.427451,
+      1.000000, 1.000000, 0.000000, -2.000000, 4.000000, 6.000000, 0.439216,
+      0.439216, 0.439216, 1.000000, 0.620728, 0.000000, -0.482673, 4.000000,
+      6.000000, 0.356863, 0.356863, 0.356863, 1.000000, 1.000000, -0.500000,
+      -2.000000, 4.000000, 8.000000, 0.435294, 0.435294, 0.435294, 1.000000,
+      0.619629, -0.034595, -0.478689, 4.000000, 6.138380,
+   0.333333, 0.333333, 0.333333, 1.000000, 1.500000, -0.500000, -4.000000,
+      4.000000, 8.000000, 0.388235, 0.388235, 0.388235, 1.000000, 1.500000,
+      0.000000, -4.000000, 4.000000, 6.000000, 0.427451, 0.427451, 0.427451,
+      1.000000, 1.000000, 0.000000, -2.000000, 4.000000, 6.000000, 0.517647,
+      0.517647, 0.517647, 1.000000, 1.000000, 0.500000, -2.000000, 4.000000,
+      4.000000, 0.513726, 0.513726, 0.513726, 1.000000, 0.620728, 0.360896,
+      -0.482673, 4.000000, 4.556417, 0.545098, 0.545098, 0.545098, 1.000000,
+      0.620728, 0.500000, -0.482673, 4.000000, 4.000000,
+   0.333333, 0.333333, 0.333333, 1.000000, 1.500000, -0.500000, -4.000000,
+      4.000000, 8.000000, 0.427451, 0.427451, 0.427451, 1.000000, 1.000000,
+      0.000000, -2.000000, 4.000000, 6.000000, 0.356863, 0.356863, 0.356863,
+      1.000000, 1.000000, -0.500000, -2.000000, 4.000000, 8.000000,
+   0.556863, 0.556863, 0.556863, 1.000000, 0.540283, 0.541344, -0.160891,
+      4.000000, 3.834625, 0.552941, 0.552941, 0.552941, 1.000000, 0.620728,
+      0.541344, -0.482673, 4.000000, 3.834625, 0.545098, 0.545098, 0.545098,
+      1.000000, 1.000000, 1.000000, -2.000000, 4.000000, 2.000000, 0.517647,
+      0.517647, 0.517647, 1.000000, 1.000000, 0.500000, -2.000000, 4.000000,
+      4.000000, 0.450980, 0.450980, 0.450980, 1.000000, 1.500000, 0.500000,
+      -4.000000, 4.000000, 4.000000, 0.388235, 0.388235, 0.388235, 1.000000,
+      1.500000, 0.000000, -4.000000, 4.000000, 6.000000,
+   0.517647, 0.517647, 0.517647, 1.000000, 1.000000, 0.500000, -2.000000,
+      4.000000, 4.000000, 0.552941, 0.552941, 0.552941, 1.000000, 0.620728,
+      0.541344, -0.482673, 4.000000, 3.834625, 0.545098, 0.545098, 0.545098,
+      1.000000, 0.620728, 0.500000, -0.482673, 4.000000, 4.000000,
+   0.450980, 0.450980, 0.450980, 1.000000, 1.500000, 0.500000, -4.000000,
+      4.000000, 4.000000, 0.435294, 0.435294, 0.435294, 1.000000, 1.500000,
+      1.000000, -4.000000, 4.000000, 2.000000, 0.545098, 0.545098, 0.545098,
+      1.000000, 1.000000, 1.000000, -2.000000, 4.000000, 2.000000,
+   0.439216, 0.439216, 0.439216, 1.000000, 0.379272, 0.000000, 0.482673,
+      4.000000, 6.000000, 0.517647, 0.517647, 0.517647, 1.000000, 0.000000,
+      0.500000, 2.000000, 4.000000, 4.000000, 0.427451, 0.427451, 0.427451,
+      1.000000, 0.000000, 0.000000, 2.000000, 4.000000, 6.000000,
+   0.556863, 0.556863, 0.556863, 1.000000, 0.540283, 0.541344, -0.160891,
+      4.000000, 3.834625, 0.545098, 0.545098, 0.545098, 1.000000, 1.000000,
+      1.000000, -2.000000, 4.000000, 2.000000, 0.600000, 0.600000, 0.600000,
+      1.000000, 0.500000, 1.000000, 0.000000, 4.000000, 2.000000
+};
+
+
+/* Object: skin_12 */
+
+static const int striplength_skin_12[] = {
+   12, 12, 12, 12, 12, 0
+};
+
+static const float stripdata_skin_12[] = {
+   0.498039, 0.498039, 0.498039, 1.000000, -0.099976, 1.500000, -2.400000,
+      -4.000000, -0.000002, 0.337255, 0.337255, 0.337255, 1.000000, -0.500000,
+      1.500000, -4.000000, -4.000000, -0.000002, 0.568627, 0.568627, 0.568627,
+      1.000000, -0.099976, 1.100000, -2.400000, -4.000000, 1.599999, 0.341176,
+      0.341176, 0.341176, 1.000000, -0.500000, 1.100000, -4.000000, -4.000000,
+      1.599999, 0.498039, 0.498039, 0.498039, 1.000000, -0.099976, 0.700000,
+      -2.400000, -4.000000, 3.200000, 0.325490, 0.325490, 0.325490, 1.000000,
+      -0.500000, 0.700000, -4.000000, -4.000000, 3.199999, 0.352941, 0.352941,
+      0.352941, 1.000000, -0.099976, 0.300000, -2.400000, -4.000000, 4.800000,
+      0.282353, 0.282353, 0.282353, 1.000000, -0.500000, 0.300000, -4.000000,
+      -4.000000, 4.800000, 0.282353, 0.282353, 0.282353, 1.000000, -0.099976,
+      -0.100000, -2.400000, -4.000000, 6.400001, 0.254902, 0.254902, 0.254902,
+      1.000000, -0.500000, -0.100000, -4.000000, -4.000000, 6.400000,
+      0.239216, 0.239216, 0.239216, 1.000000, -0.099976, -0.500000, -2.400000,
+      -4.000000, 8.000000, 0.227451, 0.227451, 0.227451, 1.000000, -0.500000,
+      -0.500000, -4.000000, -4.000000, 8.000000,
+   0.239216, 0.239216, 0.239216, 1.000000, 1.099976, -0.500000, 2.400001,
+      -4.000000, 8.000000, 0.227451, 0.227451, 0.227451, 1.000000, 1.500000,
+      -0.500000, 4.000002, -4.000000, 8.000000, 0.282353, 0.282353, 0.282353,
+      1.000000, 1.099976, -0.100000, 2.400001, -4.000000, 6.400001, 0.254902,
+      0.254902, 0.254902, 1.000000, 1.500000, -0.100000, 4.000002, -4.000000,
+      6.400001, 0.352941, 0.352941, 0.352941, 1.000000, 1.099976, 0.300000,
+      2.400002, -4.000000, 4.800001, 0.282353, 0.282353, 0.282353, 1.000000,
+      1.500000, 0.300000, 4.000002, -4.000000, 4.800001, 0.498039, 0.498039,
+      0.498039, 1.000000, 1.099976, 0.700000, 2.400002, -4.000000, 3.200000,
+      0.321569, 0.321569, 0.321569, 1.000000, 1.500000, 0.700000, 4.000003,
+      -4.000000, 3.200000, 0.568627, 0.568627, 0.568627, 1.000000, 1.099976,
+      1.100000, 2.400002, -4.000000, 1.599999, 0.341176, 0.341176, 0.341176,
+      1.000000, 1.500000, 1.100000, 4.000003, -4.000000, 1.599999, 0.494118,
+      0.494118, 0.494118, 1.000000, 1.099976, 1.500000, 2.400003, -4.000000,
+      -0.000002, 0.337255, 0.337255, 0.337255, 1.000000, 1.500000, 1.500000,
+      4.000004, -4.000000, -0.000002,
+   0.639216, 0.639216, 0.639216, 1.000000, 0.300049, 1.500000, -0.799999,
+      -4.000000, -0.000002, 0.498039, 0.498039, 0.498039, 1.000000, -0.099976,
+      1.500000, -2.400000, -4.000000, -0.000002, 0.858824, 0.858824, 0.858824,
+      1.000000, 0.300049, 1.100000, -0.799999, -4.000000, 1.599999, 0.568627,
+      0.568627, 0.568627, 1.000000, -0.099976, 1.100000, -2.400000, -4.000000,
+      1.599999, 0.686275, 0.686275, 0.686275, 1.000000, 0.300049, 0.700000,
+      -0.799999, -4.000000, 3.200000, 0.498039, 0.498039, 0.498039, 1.000000,
+      -0.099976, 0.700000, -2.400000, -4.000000, 3.200000, 0.419608, 0.419608,
+      0.419608, 1.000000, 0.300049, 0.300000, -0.800000, -4.000000, 4.800000,
+      0.352941, 0.352941, 0.352941, 1.000000, -0.099976, 0.300000, -2.400000,
+      -4.000000, 4.800000, 0.298039, 0.298039, 0.298039, 1.000000, 0.300049,
+      -0.100000, -0.800000, -4.000000, 6.400001, 0.282353, 0.282353, 0.282353,
+      1.000000, -0.099976, -0.100000, -2.400000, -4.000000, 6.400001,
+      0.247059, 0.247059, 0.247059, 1.000000, 0.300049, -0.500000, -0.800000,
+      -4.000000, 8.000000, 0.239216, 0.239216, 0.239216, 1.000000, -0.099976,
+      -0.500000, -2.400000, -4.000000, 8.000000,
+   0.639216, 0.639216, 0.639216, 1.000000, 0.699951, 1.500000, 0.800002,
+      -4.000000, -0.000002, 0.639216, 0.639216, 0.639216, 1.000000, 0.300049,
+      1.500000, -0.799999, -4.000000, -0.000002, 0.858824, 0.858824, 0.858824,
+      1.000000, 0.699951, 1.100000, 0.800001, -4.000000, 1.599999, 0.858824,
+      0.858824, 0.858824, 1.000000, 0.300049, 1.100000, -0.799999, -4.000000,
+      1.599999, 0.686275, 0.686275, 0.686275, 1.000000, 0.699951, 0.700000,
+      0.800001, -4.000000, 3.200000, 0.686275, 0.686275, 0.686275, 1.000000,
+      0.300049, 0.700000, -0.799999, -4.000000, 3.200000, 0.419608, 0.419608,
+      0.419608, 1.000000, 0.699951, 0.300000, 0.800001, -4.000000, 4.800001,
+      0.419608, 0.419608, 0.419608, 1.000000, 0.300049, 0.300000, -0.800000,
+      -4.000000, 4.800000, 0.298039, 0.298039, 0.298039, 1.000000, 0.699951,
+      -0.100000, 0.800001, -4.000000, 6.400001, 0.298039, 0.298039, 0.298039,
+      1.000000, 0.300049, -0.100000, -0.800000, -4.000000, 6.400001, 0.247059,
+      0.247059, 0.247059, 1.000000, 0.699951, -0.500000, 0.800000, -4.000000,
+      8.000000, 0.247059, 0.247059, 0.247059, 1.000000, 0.300049, -0.500000,
+      -0.800000, -4.000000, 8.000000,
+   0.494118, 0.494118, 0.494118, 1.000000, 1.099976, 1.500000, 2.400003,
+      -4.000000, -0.000002, 0.639216, 0.639216, 0.639216, 1.000000, 0.699951,
+      1.500000, 0.800002, -4.000000, -0.000002, 0.568627, 0.568627, 0.568627,
+      1.000000, 1.099976, 1.100000, 2.400002, -4.000000, 1.599999, 0.858824,
+      0.858824, 0.858824, 1.000000, 0.699951, 1.100000, 0.800001, -4.000000,
+      1.599999, 0.498039, 0.498039, 0.498039, 1.000000, 1.099976, 0.700000,
+      2.400002, -4.000000, 3.200000, 0.686275, 0.686275, 0.686275, 1.000000,
+      0.699951, 0.700000, 0.800001, -4.000000, 3.200000, 0.352941, 0.352941,
+      0.352941, 1.000000, 1.099976, 0.300000, 2.400002, -4.000000, 4.800001,
+      0.419608, 0.419608, 0.419608, 1.000000, 0.699951, 0.300000, 0.800001,
+      -4.000000, 4.800001, 0.282353, 0.282353, 0.282353, 1.000000, 1.099976,
+      -0.100000, 2.400001, -4.000000, 6.400001, 0.298039, 0.298039, 0.298039,
+      1.000000, 0.699951, -0.100000, 0.800001, -4.000000, 6.400001, 0.239216,
+      0.239216, 0.239216, 1.000000, 1.099976, -0.500000, 2.400001, -4.000000,
+      8.000000, 0.247059, 0.247059, 0.247059, 1.000000, 0.699951, -0.500000,
+      0.800000, -4.000000, 8.000000
+};
+
+
+/* Object: skin_11 */
+
+static const int striplength_skin_11[] = {
+   12, 12, 12, 12, 12, 0
+};
+
+static const float stripdata_skin_11[] = {
+   0.145098, 0.145098, 0.145098, 1.000000, -0.099976, 1.500000, -2.400000,
+      4.000002, 0.000000, 0.141176, 0.141176, 0.141176, 1.000000, -0.500000,
+      1.500000, -4.000000, 4.000002, 0.000000, 0.176471, 0.176471, 0.176471,
+      1.000000, -0.099976, 1.100000, -2.400000, 2.400001, 0.000000, 0.145098,
+      0.145098, 0.145098, 1.000000, -0.500000, 1.100000, -4.000000, 2.400001,
+      0.000000, 0.341176, 0.341176, 0.341176, 1.000000, -0.099976, 0.700000,
+      -2.400000, 0.800000, 0.000000, 0.188235, 0.188235, 0.188235, 1.000000,
+      -0.500000, 0.700000, -4.000000, 0.800000, 0.000000, 0.450980, 0.450980,
+      0.450980, 1.000000, -0.099976, 0.300000, -2.400000, -0.800000, 0.000000,
+      0.247059, 0.247059, 0.247059, 1.000000, -0.500000, 0.300000, -4.000000,
+      -0.800000, 0.000000, 0.439216, 0.439216, 0.439216, 1.000000, -0.099976,
+      -0.100000, -2.400000, -2.400000, 0.000000, 0.270588, 0.270588, 0.270588,
+      1.000000, -0.500000, -0.100000, -4.000000, -2.400000, 0.000000,
+      0.364706, 0.364706, 0.364706, 1.000000, -0.099976, -0.500000, -2.400000,
+      -4.000000, 0.000000, 0.258824, 0.258824, 0.258824, 1.000000, -0.500000,
+      -0.500000, -4.000000, -4.000000, 0.000000,
+   0.364706, 0.364706, 0.364706, 1.000000, 1.099976, -0.500000, 2.400001,
+      -4.000000, 0.000000, 0.258824, 0.258824, 0.258824, 1.000000, 1.500000,
+      -0.500000, 4.000002, -4.000000, 0.000000, 0.439216, 0.439216, 0.439216,
+      1.000000, 1.099976, -0.100000, 2.400001, -2.400001, 0.000000, 0.270588,
+      0.270588, 0.270588, 1.000000, 1.500000, -0.100000, 4.000002, -2.400001,
+      0.000000, 0.454902, 0.454902, 0.454902, 1.000000, 1.099976, 0.300000,
+      2.400002, -0.800000, 0.000000, 0.247059, 0.247059, 0.247059, 1.000000,
+      1.500000, 0.300000, 4.000002, -0.800000, 0.000000, 0.341176, 0.341176,
+      0.341176, 1.000000, 1.099976, 0.700000, 2.400002, 0.800000, 0.000000,
+      0.184314, 0.184314, 0.184314, 1.000000, 1.500000, 0.700000, 4.000003,
+      0.800000, 0.000000, 0.176471, 0.176471, 0.176471, 1.000000, 1.099976,
+      1.100000, 2.400002, 2.400001, 0.000000, 0.145098, 0.145098, 0.145098,
+      1.000000, 1.500000, 1.100000, 4.000003, 2.400001, 0.000000, 0.145098,
+      0.145098, 0.145098, 1.000000, 1.099976, 1.500000, 2.400003, 4.000003,
+      0.000000, 0.141176, 0.141176, 0.141176, 1.000000, 1.500000, 1.500000,
+      4.000004, 4.000002, 0.000000,
+   0.145098, 0.145098, 0.145098, 1.000000, 0.300049, 1.500000, -0.799999,
+      4.000002, 0.000000, 0.145098, 0.145098, 0.145098, 1.000000, -0.099976,
+      1.500000, -2.400000, 4.000002, 0.000000, 0.262745, 0.262745, 0.262745,
+      1.000000, 0.300049, 1.100000, -0.799999, 2.400001, 0.000000, 0.176471,
+      0.176471, 0.176471, 1.000000, -0.099976, 1.100000, -2.400000, 2.400001,
+      0.000000, 0.580392, 0.580392, 0.580392, 1.000000, 0.300049, 0.700000,
+      -0.799999, 0.800000, 0.000000, 0.341176, 0.341176, 0.341176, 1.000000,
+      -0.099976, 0.700000, -2.400000, 0.800000, 0.000000, 0.709804, 0.709804,
+      0.709804, 1.000000, 0.300049, 0.300000, -0.800000, -0.800000, 0.000000,
+      0.450980, 0.450980, 0.450980, 1.000000, -0.099976, 0.300000, -2.400000,
+      -0.800000, 0.000000, 0.627451, 0.627451, 0.627451, 1.000000, 0.300049,
+      -0.100000, -0.800000, -2.400001, 0.000000, 0.439216, 0.439216, 0.439216,
+      1.000000, -0.099976, -0.100000, -2.400000, -2.400000, 0.000000,
+      0.458824, 0.458824, 0.458824, 1.000000, 0.300049, -0.500000, -0.800000,
+      -4.000000, 0.000000, 0.364706, 0.364706, 0.364706, 1.000000, -0.099976,
+      -0.500000, -2.400000, -4.000000, 0.000000,
+   0.145098, 0.145098, 0.145098, 1.000000, 0.699951, 1.500000, 0.800002,
+      4.000002, 0.000000, 0.145098, 0.145098, 0.145098, 1.000000, 0.300049,
+      1.500000, -0.799999, 4.000002, 0.000000, 0.262745, 0.262745, 0.262745,
+      1.000000, 0.699951, 1.100000, 0.800001, 2.400001, 0.000000, 0.262745,
+      0.262745, 0.262745, 1.000000, 0.300049, 1.100000, -0.799999, 2.400001,
+      0.000000, 0.580392, 0.580392, 0.580392, 1.000000, 0.699951, 0.700000,
+      0.800001, 0.800000, 0.000000, 0.580392, 0.580392, 0.580392, 1.000000,
+      0.300049, 0.700000, -0.799999, 0.800000, 0.000000, 0.713726, 0.713726,
+      0.713726, 1.000000, 0.699951, 0.300000, 0.800001, -0.800000, 0.000000,
+      0.709804, 0.709804, 0.709804, 1.000000, 0.300049, 0.300000, -0.800000,
+      -0.800000, 0.000000, 0.631373, 0.631373, 0.631373, 1.000000, 0.699951,
+      -0.100000, 0.800001, -2.400001, 0.000000, 0.627451, 0.627451, 0.627451,
+      1.000000, 0.300049, -0.100000, -0.800000, -2.400001, 0.000000, 0.458824,
+      0.458824, 0.458824, 1.000000, 0.699951, -0.500000, 0.800000, -4.000000,
+      0.000000, 0.458824, 0.458824, 0.458824, 1.000000, 0.300049, -0.500000,
+      -0.800000, -4.000000, 0.000000,
+   0.145098, 0.145098, 0.145098, 1.000000, 1.099976, 1.500000, 2.400003,
+      4.000003, 0.000000, 0.145098, 0.145098, 0.145098, 1.000000, 0.699951,
+      1.500000, 0.800002, 4.000002, 0.000000, 0.176471, 0.176471, 0.176471,
+      1.000000, 1.099976, 1.100000, 2.400002, 2.400001, 0.000000, 0.262745,
+      0.262745, 0.262745, 1.000000, 0.699951, 1.100000, 0.800001, 2.400001,
+      0.000000, 0.341176, 0.341176, 0.341176, 1.000000, 1.099976, 0.700000,
+      2.400002, 0.800000, 0.000000, 0.580392, 0.580392, 0.580392, 1.000000,
+      0.699951, 0.700000, 0.800001, 0.800000, 0.000000, 0.454902, 0.454902,
+      0.454902, 1.000000, 1.099976, 0.300000, 2.400002, -0.800000, 0.000000,
+      0.713726, 0.713726, 0.713726, 1.000000, 0.699951, 0.300000, 0.800001,
+      -0.800000, 0.000000, 0.439216, 0.439216, 0.439216, 1.000000, 1.099976,
+      -0.100000, 2.400001, -2.400001, 0.000000, 0.631373, 0.631373, 0.631373,
+      1.000000, 0.699951, -0.100000, 0.800001, -2.400001, 0.000000, 0.364706,
+      0.364706, 0.364706, 1.000000, 1.099976, -0.500000, 2.400001, -4.000000,
+      0.000000, 0.458824, 0.458824, 0.458824, 1.000000, 0.699951, -0.500000,
+      0.800000, -4.000000, 0.000000
+};
+
+
+/* Object: skin_9 */
+
+static const int striplength_skin_9[] = {
+   18, 0
+};
+
+static const float stripdata_skin_9[] = {
+   0.384314, 0.384314, 0.384314, 1.000000, -0.500000, 1.500000, -4.000000,
+      4.000000, 8.000000, 0.384314, 0.384314, 0.384314, 1.000000, 1.500000,
+      1.500000, 4.000000, 4.000000, 8.000000, 0.376471, 0.376471, 0.376471,
+      1.000000, -0.500000, 1.250000, -4.000000, 3.695518, 9.530733, 0.403922,
+      0.403922, 0.403922, 1.000000, 1.500000, 1.250000, 4.000000, 3.695518,
+      9.530733, 0.415686, 0.415686, 0.415686, 1.000000, -0.500000, 1.000000,
+      -4.000000, 2.828427, 10.828427, 0.431373, 0.431373, 0.431373, 1.000000,
+      1.500000, 1.000000, 4.000000, 2.828427, 10.828427, 0.435294, 0.435294,
+      0.435294, 1.000000, -0.500000, 0.750000, -4.000000, 1.530734, 11.695518,
+      0.443137, 0.443137, 0.443137, 1.000000, 1.500000, 0.750000, 4.000000,
+      1.530734, 11.695518, 0.439216, 0.439216, 0.439216, 1.000000, -0.500000,
+      0.500000, -4.000000, 0.000000, 12.000000, 0.435294, 0.435294, 0.435294,
+      1.000000, 1.500000, 0.500000, 4.000000, 0.000000, 12.000000, 0.427451,
+      0.427451, 0.427451, 1.000000, -0.500000, 0.250000, -4.000000, -1.530734,
+      11.695518, 0.411765, 0.411765, 0.411765, 1.000000, 1.500000, 0.250000,
+      4.000000, -1.530734, 11.695518, 0.396078, 0.396078, 0.396078, 1.000000,
+      -0.500000, 0.000000, -4.000000, -2.828427, 10.828427, 0.368627,
+      0.368627, 0.368627, 1.000000, 1.500000, 0.000000, 4.000000, -2.828427,
+      10.828427, 0.341176, 0.341176, 0.341176, 1.000000, -0.500000, -0.250000,
+      -4.000000, -3.695518, 9.530733, 0.301961, 0.301961, 0.301961, 1.000000,
+      1.500000, -0.250000, 4.000000, -3.695518, 9.530733, 0.294118, 0.294118,
+      0.294118, 1.000000, -0.500000, -0.500000, -4.000000, -4.000000,
+      8.000000, 0.294118, 0.294118, 0.294118, 1.000000, 1.500000, -0.500000,
+      4.000000, -4.000000, 8.000000
+};
diff --git a/progs/demos/winpos.c b/progs/demos/winpos.c
new file mode 100644
index 000000000..2ee1df69f
--- /dev/null
+++ b/progs/demos/winpos.c
@@ -0,0 +1,118 @@
+
+/*
+ * Example of how to use the GL_MESA_window_pos extension.
+ * Brian Paul   This file is in the public domain.
+ */
+
+#include <math.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#ifdef _WIN32
+#include <windows.h>
+#endif
+#define GL_GLEXT_PROTOTYPES
+#include "GL/glut.h"
+
+#include "readtex.h"
+
+#define IMAGE_FILE "../images/girl.rgb"
+
+
+#ifndef M_PI
+#  define M_PI 3.14159265
+#endif
+
+
+
+static GLubyte *Image;
+static int ImgWidth, ImgHeight;
+static GLenum ImgFormat;
+
+typedef void (APIENTRY * PFNWINDOWPOSFUNC)(GLfloat x, GLfloat y);
+static PFNWINDOWPOSFUNC WindowPosFunc;
+
+static void draw( void )
+{
+   GLfloat angle;
+
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   for (angle = -45.0; angle <= 135.0; angle += 10.0) {
+      GLfloat x = 50.0 + 200.0 * cos( angle * M_PI / 180.0 );
+      GLfloat y = 50.0 + 200.0 * sin( angle * M_PI / 180.0 );
+
+      /* Don't need to worry about the modelview or projection matrices!!! */
+      (*WindowPosFunc)( x, y );
+
+      glDrawPixels( ImgWidth, ImgHeight, ImgFormat, GL_UNSIGNED_BYTE, Image );
+   }
+   glFinish();
+}
+
+
+static void key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         exit(0);
+   }
+}
+
+
+/* new window size or exposure */
+static void reshape( int width, int height )
+{
+   glViewport(0, 0, (GLint)width, (GLint)height);
+}
+
+
+static void init( void )
+{
+#ifdef GL_ARB_window_pos
+   if (glutExtensionSupported("GL_ARB_window_pos")) {
+      printf("Using GL_ARB_window_pos\n");
+      WindowPosFunc = &glWindowPos2fARB;
+   }
+   else
+#elif defined(GL_ARB_window_pos)
+   if (glutExtensionSupported("GL_MESA_window_pos")) {
+      printf("Using GL_MESA_window_pos\n");
+      WindowPosFunc = &glWindowPos2fMESA;
+   }
+   else
+#endif
+   {
+      printf("Sorry, GL_ARB/MESA_window_pos extension not available.\n");
+      exit(1);
+   }
+
+   Image = LoadRGBImage( IMAGE_FILE, &ImgWidth, &ImgHeight, &ImgFormat );
+   if (!Image) {
+      printf("Couldn't read %s\n", IMAGE_FILE);
+      exit(0);
+   }
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(500, 500);
+   glutInitDisplayMode( GLUT_RGB );
+
+   if (glutCreateWindow("winpos") <= 0) {
+      exit(0);
+   }
+
+   init();
+
+   glutReshapeFunc( reshape );
+   glutKeyboardFunc( key );
+   glutDisplayFunc( draw );
+   glutMainLoop();
+   return 0;
+}