_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_ _C_ eqn is automatically replaced with neqn for nroff _header(CullFace,specify whether front- or back-facing facets can be culled) _names(CullFace) .SH PARAMETERS _phead(_param1) Specifies whether front- or back-facing facets are candidates for culling. Symbolic constants _const(FRONT), _const(BACK), and _const(FRONT_AND_BACK) are accepted. The initial value is _const(BACK). .SH DESCRIPTION _cmnd specifies whether front- or back-facing facets are culled (as specified by \f2mode\fP) when facet culling is enabled. Facet culling is initially disabled. To enable and disable facet culling, call the _cmnd(Enable) and _cmnd(Disable) commands with the argument _const(CULL_FACE). Facets include triangles, quadrilaterals, polygons, and rectangles. .P _cmnd(FrontFace) specifies which of the clockwise and counterclockwise facets are front-facing and back-facing. See _cmnd(FrontFace). .SH NOTES If _param1 is _const(FRONT_AND_BACK), no facets are drawn, but other primitives such as points and lines are drawn. .SH ERRORS _const(INVALID_ENUM) is generated if _param1 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(IsEnabled) with argument _const(CULL_FACE) .br _cmnd(Get) with argument _const(CULL_FACE_MODE) .SH SEE ALSO _cmnd(Enable), _cmnd(FrontFace)