upstream-man-pages/manglsl/gl_TessCoord.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_TessCoord">
   5     <refmeta>
   6         <refmetainfo>
   7             <copyright>
   8                 <year>2011</year>
   9                 <holder>Khronos Group</holder>
  10             </copyright>
  11         </refmetainfo>
  12         <refentrytitle>gl_TessCoord</refentrytitle>
  13         <manvolnum>3G</manvolnum>
  14     </refmeta>
  15     <refnamediv>
  16         <refname>gl_TessCoord</refname>
  17         <refpurpose>contains the coordinate of the vertex within the current patch</refpurpose>
  18     </refnamediv>
  19     <refsynopsisdiv><title>Declaration</title>
  20         <funcsynopsis>
  21             <function>in vec3 gl_TessCoord;</function>
  22         </funcsynopsis>
  23     </refsynopsisdiv>
  24     <refsect1 id="description"><title>Description</title>
  25         <para>
  26             Available only in the tessellation cevaluation language, <function>gl_TessCoord</function>
  27             specifies the three component (u, v, w) vector identifying the position of the vertex being
  28             processed by the shader relative to the primitive being tessellated.
  29         </para>
  30     </refsect1>
  31     <refsect1 id="versions"><title>Version Support</title>
  32         <informaltable frame="topbot">
  33             <tgroup cols="3" align="left">
  34                 <colspec colwidth="1.1*" />
  35                 <colspec colwidth="1*" align="center" />
  36                 <colspec colwidth="1*" align="center" />
  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                 <thead>
  44                     <row>
  45                         <entry rowsep="1" align="left"><emphasis role="bold">
  46                         Variable
  47                         </emphasis></entry>
  48                         <entry rowsep="1" align="left"><emphasis role="bold">
  49                         Version 1.10
  50                         </emphasis></entry>
  51                         <entry rowsep="1" align="left"><emphasis role="bold">
  52                         Version 1.20
  53                         </emphasis></entry>
  54                         <entry rowsep="1" align="left"><emphasis role="bold">
  55                         Version 1.30
  56                         </emphasis></entry>
  57                         <entry rowsep="1" align="left"><emphasis role="bold">
  58                         Version 1.40
  59                         </emphasis></entry>
  60                         <entry rowsep="1" align="left"><emphasis role="bold">
  61                         Version 1.50
  62                         </emphasis></entry>
  63                         <entry rowsep="1" align="left"><emphasis role="bold">
  64                         Version 3.30
  65                         </emphasis></entry>
  66                         <entry rowsep="1" align="left"><emphasis role="bold">
  67                         Version 4.00
  68                         </emphasis></entry>
  69                         <entry rowsep="1" align="left"><emphasis role="bold">
  70                         Version 4.10
  71                         </emphasis></entry>
  72                     </row>
  73                     <row>
  74                         <entry>
  75                             gl_TessCoord
  76                         </entry>
  77                         <entry>
  78                             <emphasis>-</emphasis>  <!-- 1.10, OpenGL 2.0 -->
  79                         </entry>
  80                         <entry>
  81                             <emphasis>-</emphasis>  <!-- 1.20, OpenGL 2.1 -->
  82                         </entry>
  83                         <entry>
  84                             <emphasis>-</emphasis>  <!-- 1.30, OpenGL 3.0 -->
  85                         </entry>
  86                         <entry>
  87                             <emphasis>-</emphasis>  <!-- 1.40, OpenGL 3.1 -->
  88                         </entry>
  89                         <entry>
  90                             <emphasis>-</emphasis>  <!-- 1.50, OpenGL 3.2 -->
  91                         </entry>
  92                         <entry>
  93                             <emphasis>-</emphasis>  <!-- 3.30, OpenGL 3.3 -->
  94                         </entry>
  95                         <entry>
  96                             <emphasis>Y</emphasis>  <!-- 4.00, OpenGL 4.0 -->
  97                         </entry>
  98                         <entry>
  99                             <emphasis>Y</emphasis>  <!-- 4.10, OpenGL 4.1 -->
 100                         </entry>
 101                     </row>
 102                 </thead>
 103             </tgroup>
 104         </informaltable>
 105     </refsect1>
 106     <refsect1 id="seealso"><title>See Also</title>
 107         <para>
 108             <citerefentry><refentrytitle>gl_TessLevelOuter</refentrytitle></citerefentry>,
 109             <citerefentry><refentrytitle>gl_TessLevelInner</refentrytitle></citerefentry>,
 110             <citerefentry><refentrytitle>gl_PatchVerticesIn</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>