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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(EdgeFlag,flag edges as either boundary or nonboundary)
-_names(EdgeFlag)
-.SH PARAMETERS
-_phead(_param1)
-Specifies the current edge flag value,
-either _const(TRUE) or _const(FALSE). The initial value is _const(TRUE).
-_names(EdgeFlagv)
-.SH PARAMETERS
-_phead(_param1)
-Specifies a pointer to an array that contains a single boolean element,
-which replaces the current edge flag value.
-.SH DESCRIPTION
-Each vertex of a polygon,
-separate triangle,
-or separate quadrilateral specified between a _cmnd(Begin)/_cmnd(End) pair
-is marked as the start of either a boundary or nonboundary edge.
-If the current edge flag is true when the vertex is specified,
-the vertex is marked as the start of a boundary edge.
-Otherwise, the vertex is marked as the start of a nonboundary edge.
-_cmnd sets the edge flag bit to _const(TRUE) if _param1 is _const(TRUE),
-and to _const(FALSE) otherwise.
-.P
-The vertices of connected triangles and connected quadrilaterals are always
-marked as boundary,
-regardless of the value of the edge flag.
-.P
-Boundary and nonboundary edge flags on vertices are significant only if
-_const(POLYGON_MODE) is set to _const(POINT) or _const(LINE).
-See _cmnd(PolygonMode).
-.SH NOTES
-The current edge flag can be updated at any time.
-In particular,
-_cmnd can be called between a call to _cmnd(Begin) and the corresponding
-call to _cmnd(End).
-.SH ASSOCIATED GETS
-_cmnd(Get) with argument _const(EDGE_FLAG)
-.SH SEE ALSO
-_cmnd(Begin),
-_cmnd(EdgeFlagPointer),
-_cmnd(PolygonMode)