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"opengl-man.css" /><title>gl_VertexID - OpenGL Shading Language (GLSL)
</title><meta name=
"generator" content=
"DocBook XSL Stylesheets V1.69.1" /></head><body><div class=
"refentry" lang=
"en" xml:
lang=
"en"><a id=
"gl_VertexID"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>gl_VertexID — contains the index of the current vertex
</p></div><div class=
"refsynopsisdiv"><h2>Declaration
</h2><div class=
"funcsynopsis"><code class=
"function">in int gl_VertexID;
</code></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
5 <code class=
"function">gl_VertexID
</code> is a vertex language input variable that holds an
6 integer index for the vertex. The index is impliclty generated by
<code class=
"function">glDrawArrays
</code>
7 and other commands that do not reference the content of the
<code class=
"constant">GL_ELEMENT_ARRAY_BUFFER
</code>, or
8 explicitly generated from the content of the
<code class=
"constant">GL_ELEMENT_ARRAY_BUFFER
</code>
9 by commands such as
<code class=
"function">glDrawElements
</code>.
10 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"versions"></a><h2>Version Support
</h2><div class=
"informaltable"><table border=
"1"><colgroup><col align=
"left" /><col align=
"center" /><col align=
"center" /></colgroup><thead><tr><th align=
"left"><span class=
"bold"><strong>
12 </strong></span></th><th align=
"left"><span class=
"bold"><strong>
14 </strong></span></th><th align=
"left"><span class=
"bold"><strong>
16 </strong></span></th><th align=
"left"><span class=
"bold"><strong>
18 </strong></span></th><th align=
"left"><span class=
"bold"><strong>
20 </strong></span></th><th align=
"left"><span class=
"bold"><strong>
22 </strong></span></th><th align=
"left"><span class=
"bold"><strong>
24 </strong></span></th><th align=
"left"><span class=
"bold"><strong>
26 </strong></span></th><th align=
"left"><span class=
"bold"><strong>
28 </strong></span></th></tr><tr><th align=
"left">
30 </th><th align=
"center">
31 <span class=
"emphasis"><em>Y
</em></span>
32 </th><th align=
"center">
33 <span class=
"emphasis"><em>Y
</em></span>
34 </th><th align=
"center">
35 <span class=
"emphasis"><em>Y
</em></span>
36 </th><th align=
"center">
37 <span class=
"emphasis"><em>Y
</em></span>
38 </th><th align=
"center">
39 <span class=
"emphasis"><em>Y
</em></span>
40 </th><th align=
"center">
41 <span class=
"emphasis"><em>Y
</em></span>
42 </th><th align=
"center">
43 <span class=
"emphasis"><em>Y
</em></span>
44 </th><th align=
"center">
45 <span class=
"emphasis"><em>Y
</em></span>
46 </th></tr></thead></table></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
47 <a href=
"gl_InstanceID.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gl_InstanceID
</span></span></a>
48 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
49 Copyright
<span class=
"trademark"></span>©
2011 Khronos Group.
50 This material may be distributed subject to the terms and conditions set forth in
51 the Open Publication License, v
1.0,
8 June
1999.
52 <a href=
"http://opencontent.org/openpub/" target=
"_top">http://opencontent.org/openpub/
</a>.
53 </p></div></div></body></html>