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<?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>glVertexAttribDivisor - OpenGL 3.3 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glVertexAttribDivisor"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glVertexAttribDivisor — modify the rate at which generic vertex attributes advance during instanced rendering</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">glVertexAttribDivisor</b>(</code></td><td>GLuint  </td><td><var class="pdparam">index</var>, </td></tr><tr><td> </td><td>GLuint  </td><td><var class="pdparam">divisor</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>index</code></em></span></dt><dd><p>
                    Specify the index of the generic vertex attribute.
                </p></dd><dt><span class="term"><em class="parameter"><code>divisor</code></em></span></dt><dd><p>
                    Specify the number of instances that will pass between updates of the generic attribute at slot <em class="parameter"><code>index</code></em>.
                </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
            <code class="function">glVertexAttribDivisor</code> modifies the rate at which generic vertex attributes advance when rendering
            multiple instances of primitives in a single draw call. If <em class="parameter"><code>divisor</code></em> is zero, the attribute at slot
            <em class="parameter"><code>index</code></em> advances once per vertex. If <em class="parameter"><code>divisor</code></em> is non-zero, the attribute advances
            once per <em class="parameter"><code>divisor</code></em> instances of the set(s) of vertices being rendered.  An attribute
            is referred to as instanced if its <code class="constant">GL_VERTEX_ATTRIB_ARRAY_DIVISOR</code> value is non-zero.
        </p><p>
            <em class="parameter"><code>index</code></em> must be less than the value of <code class="constant">GL_MAX_VERTEX_ATTRIBS</code>.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p>
            <code class="function">glVertexAttribDivisor</code> is available only if the GL version is 3.3 or higher.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>
            <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>index</code></em> is greater
            than or equal to the value of <code class="constant">GL_MAX_VERTEX_ATTRIBS</code>.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
            <a href="glVertexAttribPointer.xml"><span class="citerefentry"><span class="refentrytitle">glVertexAttribPointer</span></span></a>,
            <a href="glEnableVertexAttribArray.xml"><span class="citerefentry"><span class="refentrytitle">glEnableVertexAttribArray</span></span></a>,
            <a href="glDisableVertexAttribArray.xml"><span class="citerefentry"><span class="refentrytitle">glDisableVertexAttribArray</span></span></a>
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
            Copyright <span class="trademark"></span>© 2010 Khronos Group. 
            This material may be distributed subject to the terms and conditions set forth in 
            the Open Publication License, v 1.0, 8 June 1999.
            <a href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
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