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><head><title>glCullFace</title><link rel="stylesheet" href="style.css" type="text/css"/><meta name="generator" content="DocBook XSL Stylesheets V1.59.1"/><link rel="home" href="index.xml" title="PyOpenGL 2.0.1.07 Man Pages"/><link rel="up" href="reference-GL.xml" title="GL"/><link rel="previous" href="glCopyTexSubImage3D.3G.xml" title="glCopyTexSubImage3D"/><link rel="next" href="glDeleteLists.3G.xml" title="glDeleteLists"/></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">glCullFace</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="glCopyTexSubImage3D.3G.xml">Prev</a> </td><th width="60%" align="center">GL</th><td width="20%" align="right"> <a accesskey="n" href="glDeleteLists.3G.xml">Next</a></td></tr></table><hr/></div><div class="refentry" lang="en"><a name="glCullFace.3G"/><div class="titlepage"/><div class="refnamediv"><a name="glCullFace.3G-name"/><h2>Name</h2><p>glCullFace &#8212; specify whether front- or back-facing facets can be culled</p></div><div class="refsynopsisdiv"><a name="glCullFace.3G-c_spec"/><h2>C Specification</h2><table class="funcprototype" border="0" cellpadding="0" cellspacing="0"><tr><td valign="top"><code>void <tt>glCullFace</tt></code></td><td valign="top"><code>(</code></td><td valign="top"><code>GLenum <i><tt>mode</tt></i>);</code></td></tr></table></div><div class="refsynopsisdiv"><a name="glCullFace.3G-python_spec"/><h2>Python Specification</h2><table class="funcprototype" border="0" cellpadding="0" cellspacing="0"><tr><td valign="top"><code><tt>glCullFace</tt></code></td><td valign="top"><code>(</code></td><td valign="top"><code><i><tt>mode</tt></i>) &#8594; <tt>None</tt></code></td></tr></table></div><div class="refsect1" lang="en"><a name="glCullFace.3G-parameters"/><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><i><tt>mode</tt></i></span></dt><dd>
						Specifies whether front- or back-facing facets are candidates for culling. Symbolic constants
						<tt>GL_FRONT</tt>, <tt>GL_BACK</tt>, and <tt>GL_FRONT_AND_BACK</tt> are
						accepted. The initial value is <tt>GL_BACK</tt>.
					</dd></dl></div></div><div class="refsect1" lang="en"><a name="glCullFace.3G-description"/><h2>Description</h2><p>
			<tt>glCullFace</tt> specifies whether front- or back-facing facets are culled (as specified by
			<i><tt>mode</tt></i>) when facet culling is enabled. Facet culling is initially disabled. To enable and disable
			facet culling, call the <a href="glEnable.3G.xml"><tt>glEnable</tt></a> and <a href="glEnable.3G.xml"><tt>glDisable</tt></a> commands with the argument <tt>GL_CULL_FACE</tt>. Facets include
			triangles, quadrilaterals, polygons, and rectangles.
		</p><p>
			<a href="glFrontFace.3G.xml"><tt>glFrontFace</tt></a> specifies which of the clockwise and counterclockwise facets are
			front-facing and back-facing. See <a href="glFrontFace.3G.xml"><tt>glFrontFace</tt></a>.
		</p></div><div class="refsect1" lang="en"><a name="glCullFace.3G-notes"/><h2>Notes</h2><p>
			If <i><tt>mode</tt></i> is <tt>GL_FRONT_AND_BACK</tt>, no facets are drawn, but other primitives
			such as points and lines are drawn.
		</p></div><div class="refsect1" lang="en"><a name="glCullFace.3G-errors"/><h2>Errors</h2><p>
			<tt>GL_INVALID_ENUM</tt> is generated if <i><tt>mode</tt></i> is not an accepted value.
		</p><p>
			<tt>GL_INVALID_OPERATION</tt> is generated if <tt>glCullFace</tt> is executed between the
			execution of <a href="glBegin.3G.xml"><tt>glBegin</tt></a> and the corresponding execution of <a href="glBegin.3G.xml"><tt>glEnd</tt></a>.
		</p></div><div class="refsect1" lang="en"><a name="glCullFace.3G-associated_gets"/><h2>Associated Gets</h2><p>
			<a href="glIsEnabled.3G.xml"><tt>glIsEnabled</tt></a> with argument <tt>GL_CULL_FACE</tt>
		</p><p>
			<tt>glGet</tt> with argument <tt>GL_CULL_FACE_MODE</tt>
		</p></div><div class="refsect1" lang="en"><a name="glCullFace.3G-see_also"/><h2>See Also</h2><p>
			<span class="simplelist"><a href="glEnable.3G.xml">glEnable</a>, <a href="glFrontFace.3G.xml">glFrontFace</a></span>
		</p></div></div><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="glCopyTexSubImage3D.3G.xml">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="reference-GL.xml">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="glDeleteLists.3G.xml">Next</a></td></tr><tr><td width="40%" align="left" valign="top">glCopyTexSubImage3D </td><td width="20%" align="center"><a accesskey="h" href="index.xml">Home</a></td><td width="40%" align="right" valign="top"> glDeleteLists</td></tr></table></div></body></html>
