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author | Reinhard Tartler <siretart@tauware.de> | 2011-10-10 17:43:39 +0200 |
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committer | Reinhard Tartler <siretart@tauware.de> | 2011-10-10 17:43:39 +0200 |
commit | f4092abdf94af6a99aff944d6264bc1284e8bdd4 (patch) | |
tree | 2ac1c9cc16ceb93edb2c4382c088dac5aeafdf0f /nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/begin.gl | |
parent | a840692edc9c6d19cd7c057f68e39c7d95eb767d (diff) | |
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Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1
Summary: Imported nx-X11-3.1.0-1.tar.gz
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Imported nx-X11-3.1.0-1.tar.gz
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Diffstat (limited to 'nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/begin.gl')
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1 files changed, 229 insertions, 0 deletions
diff --git a/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/begin.gl b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/begin.gl new file mode 100644 index 000000000..6e08bb1b0 --- /dev/null +++ b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/begin.gl @@ -0,0 +1,229 @@ +_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_ The first character in this file must be an '_'! +_C_ Anything on a line after _C_ is ignored +_define(_filters,tbl|eqn)_C_ +_header(Begin,delimit the vertices of a primitive or a group of like primitives) +_names(Begin) +.EQ +delim $$ +.EN +.SH PARAMETERS +_phead(_param1) +Specifies the primitive or primitives that will be created from vertices +presented between _cmnd(Begin) and the subsequent _cmnd(End). +Ten symbolic constants are accepted: +_const(POINTS), +_const(LINES), +_const(LINE_STRIP), +_const(LINE_LOOP), +_const(TRIANGLES), +_const(TRIANGLE_STRIP), +_const(TRIANGLE_FAN), +_const(QUADS), +_const(QUAD_STRIP), and +_const(POLYGON). +_names(End) +.SH DESCRIPTION +_cmnd(Begin) and _cmnd(End) delimit the vertices that define a primitive or +a group of like primitives. +_cmnd(Begin) accepts a single argument that specifies in which of ten ways the +vertices are interpreted. +Taking $n$ as an integer count starting at one, +and $N$ as the total number of vertices specified, +the interpretations are as follows: +.TP 23 +_const(POINTS) +Treats each vertex as a single point. +Vertex $n$ defines point $n$. +$N$ points are drawn. +.TP +_const(LINES) +Treats each pair of vertices as an independent line segment. +Vertices $2n^-^1$ and $2n$ define line $n$. +$N/2$ lines are drawn. +.TP +_const(LINE_STRIP) +Draws a connected group of line segments from the first vertex +to the last. +Vertices $n$ and $n~+~1$ define line $n$. +$N^-^1$ lines are drawn. +.TP +_const(LINE_LOOP) +Draws a connected group of line segments from the first vertex +to the last, +then back to the first. +Vertices $n$ and $n~+~1$ define line $n$. +The last line, however, is defined by vertices $N$ and $1$. +$N$ lines are drawn. +.TP +_const(TRIANGLES) +Treats each triplet of vertices as an independent triangle. +Vertices $3n^-^2$, $3n^-^1$, and $3n$ define triangle $n$. +$N/3$ triangles are drawn. +.BP +.TP +_const(TRIANGLE_STRIP) +Draws a connected group of triangles. One triangle is defined for each +vertex presented after the first two vertices. For odd $n$, vertices +$n$, $n~+~1$, and $n~+~2$ define triangle $n$. For even $n$, vertices +$n~+~1$, $n$, and $n~+~2$ define triangle $n$. $N^-^2$ triangles are +drawn. +.TP +_const(TRIANGLE_FAN) +Draws a connected group of triangles. +One triangle is defined for each vertex presented after the first two vertices. +Vertices $1$, +$n~+~1$, +and $n~+~2$ define triangle $n$. +$N^-^2$ triangles are drawn. +.TP +_const(QUADS) +Treats each group of four vertices as an independent quadrilateral. +Vertices $4n^-^3$, $4n^-^2$, $4n^-^1$, and $4n$ +define quadrilateral $n$. +$N/4$ quadrilaterals are drawn. +.TP +_const(QUAD_STRIP) +Draws a connected group of quadrilaterals. +One quadrilateral is defined for each pair of vertices presented +after the first pair. +Vertices $2n^-^1$, $2n$, $2n~+~2$, and $2n~+~1$ define quadrilateral $n$. +$N/2^-^1$ quadrilaterals are drawn. +Note that the order in which vertices are used to construct a quadrilateral +from strip data is different from that used with independent data. +.TP +_const(POLYGON) +Draws a single, +convex polygon. +Vertices $1$ through $N$ define this polygon. +.P +Only a subset of GL commands can be used between _cmnd(Begin) and _cmnd(End). +The commands are +_cmnd(Vertex), +_cmnd(Color), +_cmnd(Index), +_cmnd(Normal), +_cmnd(TexCoord), +_cmnd(EvalCoord), +_cmnd(EvalPoint), +_cmnd(ArrayElement), +_cmnd(Material), and +_cmnd(EdgeFlag). +Also, +it is acceptable to use +_cmnd(CallList) or +_cmnd(CallLists) to execute +display lists that include only the preceding commands. +If any other GL command is executed between _cmnd(Begin) and _cmnd(End), +the error flag is set and the command is ignored. +.P +Regardless of the value chosen for _param1(1), +there is no limit to the number of vertices that can be defined +between _cmnd(Begin) and _cmnd(End). +Lines, +triangles, +quadrilaterals, +and polygons that are incompletely specified are not drawn. +Incomplete specification results when either too few vertices are +provided to specify even a single primitive or when an incorrect multiple +of vertices is specified. The incomplete primitive is ignored; the rest are drawn. +.P +The minimum specification of vertices +for each primitive is as follows: +1 for a point, +2 for a line, +3 for a triangle, +4 for a quadrilateral, +and 3 for a polygon. +Modes that require a certain multiple of vertices are +_const(LINES) (2), +_const(TRIANGLES) (3), +_const(QUADS) (4), +and _const(QUAD_STRIP) (2). +.SH ERRORS +_const(INVALID_ENUM) is generated if _param1(1) is set to an unaccepted value. +.P +_const(INVALID_OPERATION) is generated if _cmnd(Begin) is executed between a +_cmnd(Begin) +and the corresponding execution of _cmnd(End). +.P +_const(INVALID_OPERATION) is generated if _cmnd(End) is executed without being +preceded by a _cmnd(Begin). +.P +_const(INVALID_OPERATION) is generated if a command other than +_cmnd(Vertex), +_cmnd(Color), +_cmnd(Index), +_cmnd(Normal), +_cmnd(TexCoord), +_cmnd(EvalCoord), +_cmnd(EvalPoint), +_cmnd(ArrayElement), +_cmnd(Material), +_cmnd(EdgeFlag), +_cmnd(CallList), or +_cmnd(CallLists) is executed between +the execution of _cmnd(Begin) and the corresponding +execution _cmnd(End). +.P +Execution of +_cmnd(EnableClientState), +_cmnd(DisableClientState), +_cmnd(EdgeFlagPointer), +_cmnd(TexCoordPointer), +_cmnd(ColorPointer), +_cmnd(IndexPointer), +_cmnd(NormalPointer), +.br +_cmnd(VertexPointer), +_cmnd(InterleavedArrays), or +_cmnd(PixelStore) is not allowed after a call to _cmnd(Begin) and before +the corresponding call to _cmnd(End), +but an error may or may not be generated. +.SH SEE ALSO +_cmnd(ArrayElement), +_cmnd(CallList), +_cmnd(CallLists), +_cmnd(Color), +_cmnd(EdgeFlag), +_cmnd(EvalCoord), +.br +_cmnd(EvalPoint), +_cmnd(Index), +_cmnd(Material), +_cmnd(Normal), +_cmnd(TexCoord), +_cmnd(Vertex) + + |