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-_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,eqn)_C_
-_C_      eqn is automatically replaced with neqn for nroff
-_header(PolygonMode,select a polygon rasterization mode)
-_names(PolygonMode)
-.SH PARAMETERS
-_phead(_param1)
-Specifies the polygons that _param2 applies to.
-Must be
-_const(FRONT) for front-facing polygons,
-_const(BACK) for back-facing polygons,
-or _const(FRONT_AND_BACK) for front- and back-facing polygons.
-_phead(_param2)
-Specifies how polygons will be rasterized.
-Accepted values are
-_const(POINT),
-_const(LINE), and
-_const(FILL).
-The initial value is _const(FILL) for both front- and back-facing polygons.
-.SH DESCRIPTION
-_cmnd controls the interpretation of polygons for rasterization.
-_param1 describes which polygons _param2 applies to:
-front-facing polygons (_const(FRONT)),
-back-facing polygons (_const(BACK)),
-or both (_const(FRONT_AND_BACK)).
-The polygon mode affects only the final rasterization of polygons.
-In particular,
-a polygon's vertices are lit and
-the polygon is clipped and possibly culled before these modes are applied.
-.P
-Three modes are defined and can be specified in _param2:
-.TP 14
-_const(POINT)
-Polygon vertices that are marked as the start of a boundary edge
-are drawn as points.
-Point attributes such as
-_const(POINT_SIZE) and
-_const(POINT_SMOOTH) control
-the rasterization of the points.
-Polygon rasterization attributes other than _const(POLYGON_MODE) have no effect.
-.TP
-_const(LINE)
-Boundary edges of the polygon are drawn as line segments.
-They are treated as connected line segments for line stippling;
-the line stipple counter and pattern are not reset between segments
-(see _cmnd(LineStipple)).
-Line attributes such as
-_const(LINE_WIDTH) and
-_const(LINE_SMOOTH) control
-the rasterization of the lines.
-Polygon rasterization attributes other than _const(POLYGON_MODE) have no effect.
-.TP
-_const(FILL)
-The interior of the polygon is filled.
-Polygon attributes such as
-_const(POLYGON_STIPPLE) and
-_const(POLYGON_SMOOTH) control the rasterization of the polygon.
-.SH EXAMPLES
-To draw a surface with filled back-facing polygons
-and outlined front-facing polygons,
-call
-.Ex 1
-glPolygonMode(_const(FRONT), _const(LINE));
-.Ee
-.SH NOTES
-Vertices are marked as boundary or nonboundary with an edge flag.
-Edge flags are generated internally by the GL when it decomposes
-polygons; they can be set explicitly using _cmnd(EdgeFlag).
-.SH ERRORS
-_const(INVALID_ENUM) is generated if either _param1 or _param2 is not
-an accepted value.
-.P
-_const(INVALID_OPERATION) is generated if _cmnd
-is executed between the execution of _cmnd(Begin)
-and the corresponding execution of _cmnd(End).
-.SH ASSOCIATED GETS
-_cmnd(Get) with argument _const(POLYGON_MODE)
-.SH SEE ALSO
-_cmnd(Begin),
-_cmnd(EdgeFlag),
-_cmnd(LineStipple),
-_cmnd(LineWidth),
-_cmnd(PointSize),
-_cmnd(PolygonStipple)