From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Mon, 10 Oct 2011 17:43:39 +0200 Subject: Imported nx-X11-3.1.0-1.tar.gz Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository --- .../main/doc/man/manglu/standard/nextcontour.gl | 117 +++++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100644 nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nextcontour.gl (limited to 'nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nextcontour.gl') diff --git a/nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nextcontour.gl b/nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nextcontour.gl new file mode 100644 index 000000000..2717d4dc4 --- /dev/null +++ b/nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nextcontour.gl @@ -0,0 +1,117 @@ +_C_ License Applicability. Except to the extent portions of this file are +_C_ made subject to an alternative license as permitted in the SGI Free +_C_ Software License B, Version 1.1 (the "License"), the contents of this +_C_ file are subject only to the provisions of the License. You may not use +_C_ this file except in compliance with the License. You may obtain a copy +_C_ of the License at Silicon Graphics, Inc., attn: Legal Services, 1600 +_C_ Amphitheatre Parkway, Mountain View, CA 94043-1351, or at: +_C_ +_C_ http://oss.sgi.com/projects/FreeB +_C_ +_C_ Note that, as provided in the License, the Software is distributed on an +_C_ "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS +_C_ DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND +_C_ CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A +_C_ PARTICULAR PURPOSE, AND NON-INFRINGEMENT. +_C_ +_C_ Original Code. The Original Code is: OpenGL Sample Implementation, +_C_ Version 1.2.1, released January 26, 2000, developed by Silicon Graphics, +_C_ Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc. +_C_ Copyright in any portions created by third parties is as indicated +_C_ elsewhere herein. All Rights Reserved. +_C_ +_C_ Additional Notice Provisions: The application programming interfaces +_C_ established by SGI in conjunction with the Original Code are The +_C_ OpenGL(R) Graphics System: A Specification (Version 1.2.1), released +_C_ April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version +_C_ 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X +_C_ Window System(R) (Version 1.3), released October 19, 1998. This software +_C_ was created using the OpenGL(R) version 1.2.1 Sample Implementation +_C_ published by SGI, but has not been independently verified as being +_C_ compliant with the OpenGL(R) version 1.2.1 Specification. +_C_ +_C_ $Date: 2004/03/14 08:29:09 $ $Revision: 1.1.1.4 $ +_C_ The first character in this file must be an '_'! +_C_ Anything on a line after _C_ is ignored +_define(_filters,eqn)_C_ +_C_ eqn is automatically replaced with neqn for nroff +_header(NextContour, mark the beginning of another contour) +_names(NextContour) +.EQ +delim $$ +.EN +.SH PARAMETERS +_phead(_param1) +Specifies the tessellation object (created with _cmnd(NewTess)). +_phead(_param2) +Specifies the type of the contour being defined. Valid values are +_gluconst(EXTERIOR), +_gluconst(INTERIOR), +_gluconst(UNKNOWN), +_gluconst(CCW), and +_gluconst(CW). +.SH DESCRIPTION +_cmnd is used in describing polygons with multiple contours. After the first +contour has been described through a series of _cmnd(TessVertex) calls, +a _cmnd call indicates that the previous contour is complete and that the +next contour is about to begin. +Another series of _cmnd(TessVertex) calls is then used to describe the new +contour. This process can be repeated until all contours have been described. +.P +_param2 defines what type of contour follows. +The legal contour types are as follows: +.TP 18 +_gluconst(EXTERIOR) +An exterior contour defines an exterior boundary of the polygon. +.TP +_gluconst(INTERIOR) +An interior contour defines an interior boundary of the polygon (such as +a hole). +.TP +_gluconst(UNKNOWN) +An unknown contour is analyzed by the library to determine if it is interior +or exterior. +.TP +_gluconst(CCW), +.TP +_gluconst(CW) +The first _gluconst(CCW) or _gluconst(CW) contour defined is considered to +be exterior. All other contours are considered to be exterior if they +are oriented in the same direction (clockwise or counterclockwise) as +the first contour, and interior if they are not. +.P +If one contour is of type _gluconst(CCW) or _gluconst(CW), then all +contours must be of the same type (if they are not, then all _gluconst(CCW) +and _gluconst(CW) contours will be changed to _gluconst(UNKNOWN)). +.P +Note that there is no real difference between the _gluconst(CCW) and +_gluconst(CW) contour types. +.P +Before the first contour is described, _cmnd can be called to +define the type of the first contour. +If _cmnd is not called before the first contour, then the first contour is +marked _gluconst(EXTERIOR). +.P +This command is obsolete and is provided for backward compatibility +only. Calls to _cmnd are mapped to _cmnd(TessEndContour) +followed by +_cmnd(TessBeginContour). +.SH EXAMPLE +A quadrilateral with a triangular hole in it can be described as follows: +.sp +.Ex +gluBeginPolygon(tobj); + gluTessVertex(tobj, v1, v1); + gluTessVertex(tobj, v2, v2); + gluTessVertex(tobj, v3, v3); + gluTessVertex(tobj, v4, v4); +gluNextContour(tobj, GLU_INTERIOR); + gluTessVertex(tobj, v5, v5); + gluTessVertex(tobj, v6, v6); + gluTessVertex(tobj, v7, v7); +gluEndPolygon(tobj); +.Ee +.SH SEE ALSO +_cmnd(BeginPolygon), _cmnd(NewTess), _cmnd(TessCallback), _cmnd(TessVertex), +_cmnd(TessBeginContour) + -- cgit v1.2.3