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"opengl-man.css" /><title>glCullFace
</title><meta name=
"generator" content=
"DocBook XSL Stylesheets V1.75.2" /></head><body><div class=
"refentry" title=
"glCullFace"><a id=
"glCullFace"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>glCullFace — specify whether front- or back-facing facets can be culled
</p></div><div class=
"refsynopsisdiv" title=
"C Specification"><h2>C Specification
</h2><div class=
"funcsynopsis"><table border=
"0" summary=
"Function synopsis" cellspacing=
"0" cellpadding=
"0" class=
"funcprototype-table"><tr><td><code class=
"funcdef">void
<b class=
"fsfunc">glCullFace
</b>(
</code></td><td>GLenum
<var class=
"pdparam">mode
</var><code>)
</code>;
</td></tr></table><div class=
"funcprototype-spacer"> </div></div></div><div class=
"refsect1" title=
"Parameters"><a id=
"parameters"></a><h2>Parameters
</h2><div class=
"variablelist"><dl><dt><span class=
"term"><em class=
"parameter"><code>mode
</code></em></span></dt><dd><p>
5 Specifies whether front- or back-facing facets are candidates for culling.
7 <code class=
"constant">GL_FRONT
</code>,
<code class=
"constant">GL_BACK
</code>, and
<code class=
"constant">GL_FRONT_AND_BACK
</code> are accepted.
8 The initial value is
<code class=
"constant">GL_BACK
</code>.
9 </p></dd></dl></div></div><div class=
"refsect1" title=
"Description"><a id=
"description"></a><h2>Description
</h2><p>
10 <code class=
"function">glCullFace
</code> specifies whether front- or back-facing facets are culled
11 (as specified by
<span class=
"emphasis"><em>mode
</em></span>) when facet culling is enabled. Facet
12 culling is initially disabled.
13 To enable and disable facet culling, call the
14 <a class=
"citerefentry" href=
"glEnable.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnable
</span></span></a> and
<a class=
"citerefentry" href=
"glDisable.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDisable
</span></span></a> commands
15 with the argument
<code class=
"constant">GL_CULL_FACE
</code>.
16 Facets include triangles,
21 <a class=
"citerefentry" href=
"glFrontFace.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glFrontFace
</span></span></a> specifies which of the clockwise and counterclockwise facets
22 are front-facing and back-facing.
23 See
<a class=
"citerefentry" href=
"glFrontFace.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glFrontFace
</span></span></a>.
24 </p></div><div class=
"refsect1" title=
"Notes"><a id=
"notes"></a><h2>Notes
</h2><p>
25 If
<em class=
"parameter"><code>mode
</code></em> is
<code class=
"constant">GL_FRONT_AND_BACK
</code>, no facets are drawn, but other
26 primitives such as points and lines are drawn.
27 </p></div><div class=
"refsect1" title=
"Errors"><a id=
"errors"></a><h2>Errors
</h2><p>
28 <code class=
"constant">GL_INVALID_ENUM
</code> is generated if
<em class=
"parameter"><code>mode
</code></em> is not an accepted value.
29 </p></div><div class=
"refsect1" title=
"Associated Gets"><a id=
"associatedgets"></a><h2>Associated Gets
</h2><p>
30 <a class=
"citerefentry" href=
"glIsEnabled.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glIsEnabled
</span></span></a> with argument
<code class=
"constant">GL_CULL_FACE
</code>
32 <a class=
"citerefentry" href=
"glGet.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGet
</span></span></a> with argument
<code class=
"constant">GL_CULL_FACE_MODE
</code>
33 </p></div><div class=
"refsect1" title=
"See Also"><a id=
"seealso"></a><h2>See Also
</h2><p>
34 <a class=
"citerefentry" href=
"glEnable.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnable
</span></span></a>,
35 <a class=
"citerefentry" href=
"glFrontFace.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glFrontFace
</span></span></a>
36 </p></div><div class=
"refsect1" title=
"Copyright"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
37 Copyright
<span class=
"trademark"></span>©
1991-
2006
38 Silicon Graphics, Inc. This document is licensed under the SGI
39 Free Software B License. For details, see
40 <a class=
"ulink" href=
"http://oss.sgi.com/projects/FreeB/" target=
"_top">http://oss.sgi.com/projects/FreeB/
</a>.
41 </p></div></div></body></html>