upstream-man-pages/man2/xhtml/glLoadIdentity.xml

   1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd">
   2 <!-- saved from url=(0013)about:internet -->
   3 <?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" /><title>glLoadIdentity</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glLoadIdentity"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glLoadIdentity — replace the current matrix with the identity matrix</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">glLoadIdentity</b>(</code></td><td>  </td><td><var class="pdparam">void</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
   4             <code class="function">glLoadIdentity</code> replaces the current matrix with the identity matrix.
   5             It is semantically equivalent to calling <a class="citerefentry" href="glLoadMatrix.xml"><span class="citerefentry"><span class="refentrytitle">glLoadMatrix</span></span></a>
   6             with the identity matrix
   7         </p><p>
   8         </p><p>
   9             </p><div class="informalequation"><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
  10
  11                 <mml:mfenced open="(" close=")">
  12                     <mml:mfenced open="" close="">
  13                         <mml:mtable>
  14                             <mml:mtr>
  15                                 <mml:mtd>
  16                                     <mml:mn>1</mml:mn>
  17                                 </mml:mtd>
  18                                 <mml:mtd>
  19                                     <mml:mn>0</mml:mn>
  20                                 </mml:mtd>
  21                                 <mml:mtd>
  22                                     <mml:mn>0</mml:mn>
  23                                 </mml:mtd>
  24                                 <mml:mtd>
  25                                     <mml:mn>0</mml:mn>
  26                                 </mml:mtd>
  27                             </mml:mtr>
  28                             <mml:mtr>
  29                                 <mml:mtd>
  30                                     <mml:mn>0</mml:mn>
  31                                 </mml:mtd>
  32                                 <mml:mtd>
  33                                     <mml:mn>1</mml:mn>
  34                                 </mml:mtd>
  35                                 <mml:mtd>
  36                                     <mml:mn>0</mml:mn>
  37                                 </mml:mtd>
  38                                 <mml:mtd>
  39                                     <mml:mn>0</mml:mn>
  40                                 </mml:mtd>
  41                             </mml:mtr>
  42                             <mml:mtr>
  43                                 <mml:mtd>
  44                                     <mml:mn>0</mml:mn>
  45                                 </mml:mtd>
  46                                 <mml:mtd>
  47                                     <mml:mn>0</mml:mn>
  48                                 </mml:mtd>
  49                                 <mml:mtd>
  50                                     <mml:mn>1</mml:mn>
  51                                 </mml:mtd>
  52                                 <mml:mtd>
  53                                     <mml:mn>0</mml:mn>
  54                                 </mml:mtd>
  55                             </mml:mtr>
  56                             <mml:mtr>
  57                                 <mml:mtd>
  58                                     <mml:mn>0</mml:mn>
  59                                 </mml:mtd>
  60                                 <mml:mtd>
  61                                     <mml:mn>0</mml:mn>
  62                                 </mml:mtd>
  63                                 <mml:mtd>
  64                                     <mml:mn>0</mml:mn>
  65                                 </mml:mtd>
  66                                 <mml:mtd>
  67                                     <mml:mn>1</mml:mn>
  68                                 </mml:mtd>
  69                             </mml:mtr>
  70                         </mml:mtable>
  71                     </mml:mfenced>
  72                 </mml:mfenced>
  73             </mml:math></div><p>
  74         </p><p>
  75         </p><p>
  76             but in some cases it is more efficient.
  77         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>
  78             <code class="constant">GL_INVALID_OPERATION</code> is generated if <code class="function">glLoadIdentity</code>
  79             is executed between the execution of <a class="citerefentry" href="glBegin.xml"><span class="citerefentry"><span class="refentrytitle">glBegin</span></span></a>
  80             and the corresponding execution of <a class="citerefentry" href="glEnd.xml"><span class="citerefentry"><span class="refentrytitle">glEnd</span></span></a>.
  81         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p>
  82             <a class="citerefentry" href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_MATRIX_MODE</code>
  83         </p><p>
  84             <a class="citerefentry" href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_COLOR_MATRIX</code>
  85         </p><p>
  86             <a class="citerefentry" href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_MODELVIEW_MATRIX</code>
  87         </p><p>
  88             <a class="citerefentry" href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_PROJECTION_MATRIX</code>
  89         </p><p>
  90             <a class="citerefentry" href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_TEXTURE_MATRIX</code>
  91         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
  92             <a class="citerefentry" href="glLoadMatrix.xml"><span class="citerefentry"><span class="refentrytitle">glLoadMatrix</span></span></a>,
  93             <a class="citerefentry" href="glLoadTransposeMatrix.xml"><span class="citerefentry"><span class="refentrytitle">glLoadTransposeMatrix</span></span></a>,
  94             <a class="citerefentry" href="glMatrixMode.xml"><span class="citerefentry"><span class="refentrytitle">glMatrixMode</span></span></a>,
  95             <a class="citerefentry" href="glMultMatrix.xml"><span class="citerefentry"><span class="refentrytitle">glMultMatrix</span></span></a>,
  96             <a class="citerefentry" href="glMultTransposeMatrix.xml"><span class="citerefentry"><span class="refentrytitle">glMultTransposeMatrix</span></span></a>,
  97             <a class="citerefentry" href="glPushMatrix.xml"><span class="citerefentry"><span class="refentrytitle">glPushMatrix</span></span></a>
  98         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
  99             Copyright <span class="trademark"></span>© 1991-2006
 100             Silicon Graphics, Inc. This document is licensed under the SGI
 101             Free Software B License. For details, see
 102             <a class="ulink" href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.
 103         </p></div></div></body></html>