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"text/html; charset=UTF-8" /><title>glCullFace
</title><meta name=
"generator" content=
"DocBook XSL Stylesheets V1.73.2" /></head><body><div class=
"refentry" lang=
"en" xml:
lang=
"en"><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"><h2>C Specification
</h2><div class=
"funcsynopsis"><table border=
"0" summary=
"Function synopsis" cellspacing=
"0" cellpadding=
"0"><tr><td><code class=
"funcdef">void
<b class=
"fsfunc">glCullFace
</b>(
</code></td><td>GLenum
</td><td><var class=
"pdparam">mode
</var><code>)
</code>;
</td></tr></table></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><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>
4 Specifies whether front- or back-facing facets are candidates for culling.
6 <code class=
"constant">GL_FRONT
</code>,
<code class=
"constant">GL_BACK
</code>, and
<code class=
"constant">GL_FRONT_AND_BACK
</code> are accepted.
7 The initial value is
<code class=
"constant">GL_BACK
</code>.
8 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
9 <code class=
"function">glCullFace
</code> specifies whether front- or back-facing facets are culled
10 (as specified by
<span class=
"emphasis"><em>mode
</em></span>) when facet culling is enabled. Facet
11 culling is initially disabled.
12 To enable and disable facet culling, call the
13 <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
14 with the argument
<code class=
"constant">GL_CULL_FACE
</code>.
15 Facets include triangles,
20 <a class=
"citerefentry" href=
"glFrontFace.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glFrontFace
</span></span></a> specifies which of the clockwise and counterclockwise facets
21 are front-facing and back-facing.
22 See
<a class=
"citerefentry" href=
"glFrontFace.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glFrontFace
</span></span></a>.
23 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"notes"></a><h2>Notes
</h2><p>
24 If
<em class=
"parameter"><code>mode
</code></em> is
<code class=
"constant">GL_FRONT_AND_BACK
</code>, no facets are drawn, but other
25 primitives such as points and lines are drawn.
26 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"errors"></a><h2>Errors
</h2><p>
27 <code class=
"constant">GL_INVALID_ENUM
</code> is generated if
<em class=
"parameter"><code>mode
</code></em> is not an accepted value.
29 <code class=
"constant">GL_INVALID_OPERATION
</code> is generated if
<code class=
"function">glCullFace
</code>
30 is executed between the execution of
<a class=
"citerefentry" href=
"glBegin.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBegin
</span></span></a>
31 and the corresponding execution of
<a class=
"citerefentry" href=
"glEnd.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnd
</span></span></a>.
32 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"associatedgets"></a><h2>Associated Gets
</h2><p>
33 <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>
35 <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>
36 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
37 <a class=
"citerefentry" href=
"glEnable.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnable
</span></span></a>,
38 <a class=
"citerefentry" href=
"glFrontFace.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glFrontFace
</span></span></a>
39 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
40 Copyright
<span class=
"trademark"></span>©
1991-
2006
41 Silicon Graphics, Inc. This document is licensed under the SGI
42 Free Software B License. For details, see
43 <a class=
"ulink" href=
"http://oss.sgi.com/projects/FreeB/" target=
"_top">http://oss.sgi.com/projects/FreeB/
</a>.
44 </p></div></div></body></html>