upstream-doc/manglsl/xhtml/gl_VertexID.xml

   1 <?xml version="1.0" encoding="UTF-8"?>
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   4 <?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>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>
  11                         Variable
  12                         </strong></span></th><th align="left"><span class="bold"><strong>
  13                         Version 1.10
  14                         </strong></span></th><th align="left"><span class="bold"><strong>
  15                         Version 1.20
  16                         </strong></span></th><th align="left"><span class="bold"><strong>
  17                         Version 1.30
  18                         </strong></span></th><th align="left"><span class="bold"><strong>
  19                         Version 1.40
  20                         </strong></span></th><th align="left"><span class="bold"><strong>
  21                         Version 1.50
  22                         </strong></span></th><th align="left"><span class="bold"><strong>
  23                         Version 3.30
  24                         </strong></span></th><th align="left"><span class="bold"><strong>
  25                         Version 4.00
  26                         </strong></span></th><th align="left"><span class="bold"><strong>
  27                         Version 4.10
  28                         </strong></span></th></tr><tr><th align="left">
  29                             gl_VertexID
  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>