upstream-man-pages/manglsl/gl_VertexID.xml

   1 <?xml version="1.0" encoding="UTF-8"?>
   2 <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
   3               "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
   4 <refentry id="gl_VertexID">
   5     <refmeta>
   6         <refmetainfo>
   7             <copyright>
   8                 <year>2011</year>
   9                 <holder>Khronos Group</holder>
  10             </copyright>
  11         </refmetainfo>
  12         <refentrytitle>gl_VertexID</refentrytitle>
  13         <manvolnum>3G</manvolnum>
  14     </refmeta>
  15     <refnamediv>
  16         <refname>gl_VertexID</refname>
  17         <refpurpose>contains the index of the current vertex</refpurpose>
  18     </refnamediv>
  19     <refsynopsisdiv><title>Declaration</title>
  20         <funcsynopsis>
  21             <function>in int gl_VertexID;</function>
  22         </funcsynopsis>
  23     </refsynopsisdiv>
  24     <refsect1 id="description"><title>Description</title>
  25         <para>
  26             <function>gl_VertexID</function> is a vertex language input variable that holds an
  27             integer index for the vertex. The index is impliclty generated by <function>glDrawArrays</function>
  28             and other commands that do not reference the content of the <constant>GL_ELEMENT_ARRAY_BUFFER</constant>, or
  29             explicitly generated from the content of the <constant>GL_ELEMENT_ARRAY_BUFFER</constant>
  30             by commands such as <function>glDrawElements</function>.
  31         </para>
  32     </refsect1>
  33     <refsect1 id="versions"><title>Version Support</title>
  34         <informaltable frame="topbot">
  35             <tgroup cols="3" align="left">
  36                 <colspec colwidth="1.1*" />
  37                 <colspec colwidth="1*" align="center" />
  38                 <colspec colwidth="1*" align="center" />
  39                 <colspec colwidth="1*" align="center" />
  40                 <colspec colwidth="1*" align="center" />
  41                 <colspec colwidth="1*" align="center" />
  42                 <colspec colwidth="1*" align="center" />
  43                 <colspec colwidth="1*" align="center" />
  44                 <colspec colwidth="1*" align="center" />
  45                 <thead>
  46                     <row>
  47                         <entry rowsep="1" align="left"><emphasis role="bold">
  48                         Variable
  49                         </emphasis></entry>
  50                         <entry rowsep="1" align="left"><emphasis role="bold">
  51                         Version 1.10
  52                         </emphasis></entry>
  53                         <entry rowsep="1" align="left"><emphasis role="bold">
  54                         Version 1.20
  55                         </emphasis></entry>
  56                         <entry rowsep="1" align="left"><emphasis role="bold">
  57                         Version 1.30
  58                         </emphasis></entry>
  59                         <entry rowsep="1" align="left"><emphasis role="bold">
  60                         Version 1.40
  61                         </emphasis></entry>
  62                         <entry rowsep="1" align="left"><emphasis role="bold">
  63                         Version 1.50
  64                         </emphasis></entry>
  65                         <entry rowsep="1" align="left"><emphasis role="bold">
  66                         Version 3.30
  67                         </emphasis></entry>
  68                         <entry rowsep="1" align="left"><emphasis role="bold">
  69                         Version 4.00
  70                         </emphasis></entry>
  71                         <entry rowsep="1" align="left"><emphasis role="bold">
  72                         Version 4.10
  73                         </emphasis></entry>
  74                     </row>
  75                     <row>
  76                         <entry>
  77                             gl_VertexID
  78                         </entry>
  79                         <entry>
  80                             <emphasis>Y</emphasis>
  81                         </entry>
  82                         <entry>
  83                             <emphasis>Y</emphasis>
  84                         </entry>
  85                         <entry>
  86                             <emphasis>Y</emphasis>
  87                         </entry>
  88                         <entry>
  89                             <emphasis>Y</emphasis>
  90                         </entry>
  91                         <entry>
  92                             <emphasis>Y</emphasis>
  93                         </entry>
  94                         <entry>
  95                             <emphasis>Y</emphasis>
  96                         </entry>
  97                         <entry>
  98                             <emphasis>Y</emphasis>
  99                         </entry>
 100                         <entry>
 101                             <emphasis>Y</emphasis>
 102                         </entry>
 103                     </row>
 104                 </thead>
 105             </tgroup>
 106         </informaltable>
 107     </refsect1>
 108     <refsect1 id="seealso"><title>See Also</title>
 109         <para>
 110             <citerefentry><refentrytitle>gl_InstanceID</refentrytitle></citerefentry>
 111         </para>
 112     </refsect1>
 113     <refsect1 id="Copyright"><title>Copyright</title>
 114         <para>
 115             Copyright <trademark class="copyright"></trademark> 2011 Khronos Group.
 116             This material may be distributed subject to the terms and conditions set forth in
 117             the Open Publication License, v 1.0, 8 June 1999.
 118             <ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.
 119         </para>
 120     </refsect1>
 121 </refentry>