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><head><title>glClientActiveTextureARB</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="glClearStencil.3G.xml" title="glClearStencil"/><link rel="next" href="glClipPlane.3G.xml" title="glClipPlane"/></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">glClientActiveTextureARB</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="glClearStencil.3G.xml">Prev</a> </td><th width="60%" align="center">GL</th><td width="20%" align="right"> <a accesskey="n" href="glClipPlane.3G.xml">Next</a></td></tr></table><hr/></div><div class="refentry" lang="en"><a name="glClientActiveTextureARB.3G"/><div class="titlepage"/><div class="refnamediv"><a name="glClientActiveTextureARB.3G-name"/><h2>Name</h2><p>glClientActiveTextureARB &#8212; select active texture unit</p></div><div class="refsynopsisdiv"><a name="glClientActiveTextureARB.3G-c_spec"/><h2>C Specification</h2><table class="funcprototype" border="0" cellpadding="0" cellspacing="0"><tr><td valign="top"><code>void <tt>glClientActiveTextureARB</tt></code></td><td valign="top"><code>(</code></td><td valign="top"><code>GLenum <i><tt>texture</tt></i>);</code></td></tr></table></div><div class="refsynopsisdiv"><a name="glClientActiveTextureARB.3G-python_spec"/><h2>Python Specification</h2><table class="funcprototype" border="0" cellpadding="0" cellspacing="0"><tr><td valign="top"><code><tt>glClientActiveTextureARB</tt></code></td><td valign="top"><code>(</code></td><td valign="top"><code><i><tt>texture</tt></i>) &#8594; <tt>None</tt></code></td></tr></table></div><div class="refsect1" lang="en"><a name="glClientActiveTextureARB.3G-parameters"/><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><i><tt>texture</tt></i></span></dt><dd>
						Specifies which texture unit to make active. The number of texture units is implementation dependent, but
						must be at least two. <i><tt>texture</tt></i> must be one of
						<tt>GL_TEXTURE<span class="emphasis"><em>i</em></span>_ARB</tt> where
						0 &#8804; <span class="emphasis"><em>i</em></span> &lt; <tt>GL_MAX_TEXTURE_UNITS_ARB</tt>, which
						is an implementation-dependent value. The initial value is <tt>GL_TEXTURE0_ARB</tt>.
					</dd></dl></div></div><div class="refsect1" lang="en"><a name="glClientActiveTextureARB.3G-description"/><h2>Description</h2><p>
			<tt>glClientActiveTextureARB</tt> selects the vertex array client state parameters to be modified by
			<a href="glTexCoordPointer.3G.xml"><tt>glTexCoordPointer</tt></a>, and enabled or disabled with <a href="glEnableClientState.3G.xml"><tt>glEnableClientState</tt></a> or <a href="glEnableClientState.3G.xml"><tt>glDisableClientState</tt></a>,
			respectively, when called with a parameter of <tt>GL_TEXTURE_COORD_ARRAY</tt>.
		</p></div><div class="refsect1" lang="en"><a name="glClientActiveTextureARB.3G-notes"/><h2>Notes</h2><p>
			<tt>glClientActiveTextureARB</tt> is supported only if <tt>GL_ARB_multitexture</tt> is included
			in the string returned by <a href="glGetString.3G.xml"><tt>glGetString</tt></a> when called with the argument
			<tt>GL_EXTENSIONS</tt>.
		</p><p>
			<tt>glClientActiveTextureARB</tt> sets <tt>GL_CLIENT_ACTIVE_TEXTURE_ARB</tt> to the active
			texture unit.
		</p></div><div class="refsect1" lang="en"><a name="glClientActiveTextureARB.3G-errors"/><h2>Errors</h2><p>
			<tt>GL_INVALID_ENUM</tt> is generated if <i><tt>texture</tt></i> is not one of
			<tt>GL_TEXTURE<span class="emphasis"><em>i</em></span>_ARB</tt> where
			0 &#8804; <span class="emphasis"><em>i</em></span> &lt; <tt>GL_MAX_TEXTURE_UNITS_ARB</tt>.
		</p></div><div class="refsect1" lang="en"><a name="glClientActiveTextureARB.3G-see_also"/><h2>See Also</h2><p>
			<span class="simplelist"><a href="glActiveTextureARB.3G.xml">glActiveTextureARB</a>, <a href="glEnableClientState.3G.xml">glEnableClientState</a>, <a href="glMultiTexCoordARB.3G.xml">glMultiTexCoordARB</a>, <a href="glTexCoordPointer.3G.xml">glTexCoordPointer</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="glClearStencil.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="glClipPlane.3G.xml">Next</a></td></tr><tr><td width="40%" align="left" valign="top">glClearStencil </td><td width="20%" align="center"><a accesskey="h" href="index.xml">Home</a></td><td width="40%" align="right" valign="top"> glClipPlane</td></tr></table></div></body></html>
