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<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN" "http://www.w3.org/TR/MathML2/dtd/xhtml-math11-f.dtd">
<html
xmlns="http://www.w3.org/1999/xhtml"
xmlns:mml="http://www.w3.org/1998/Math/MathML"
><head><title>glLoadMatrix</title><link rel="stylesheet" href="style.css" type="text/css"/><meta name="generator" content="DocBook XSL Stylesheets V1.59.1"/><link rel="home" href="index.xml" title="PyOpenGL 2.0.1.07 Man Pages"/><link rel="up" href="reference-GL.xml" title="GL"/><link rel="previous" href="glLoadIdentity.3G.xml" title="glLoadIdentity"/><link rel="next" href="glLoadName.3G.xml" title="glLoadName"/></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">glLoadMatrix</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="glLoadIdentity.3G.xml">Prev</a></td><th width="60%" align="center">GL</th><td width="20%" align="right"><a accesskey="n" href="glLoadName.3G.xml">Next</a></td></tr></table><hr/></div><div class="refentry" lang="en"><a name="glLoadMatrix.3G"/><div class="titlepage"/><div class="refnamediv"><a name="glLoadMatrix.3G-name"/><h2>Name</h2><p>glLoadMatrixd, glLoadMatrixf — replace the current matrix with the specified matrix</p></div><div class="refsynopsisdiv"><a name="glLoadMatrix.3G-c_spec"/><h2>C Specification</h2><table class="funcprototype" border="0" cellpadding="0" cellspacing="0"><tr><td valign="top"><code>void<tt>glLoadMatrixd</tt></code></td><td valign="top"><code>(</code></td><td valign="top"><code>constGLdouble*<i><tt>m</tt></i>);</code></td></tr><tr><td valign="top"><code>void<tt>glLoadMatrixf</tt></code></td><td valign="top"><code>(</code></td><td valign="top"><code>constGLfloat*<i><tt>m</tt></i>);</code></td></tr></table></div><div class="refsynopsisdiv"><a name="glLoadMatrix.3G-python_spec"/><h2>Python Specification</h2><table class="funcprototype" border="0" cellpadding="0" cellspacing="0"><tr><td valign="top"><code><tt>glLoadMatrixd</tt></code></td><td valign="top"><code>(</code></td><td valign="top"><code><i><tt>m</tt></i>) →<tt>None</tt></code></td></tr><tr><td valign="top"><code><tt>glLoadMatrixf</tt></code></td><td valign="top"><code>(</code></td><td valign="top"><code><i><tt>m</tt></i>) →<tt>None</tt></code></td></tr></table></div><div class="refsect1" lang="en"><a name="glLoadMatrix.3G-parameters"/><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><i><tt>m</tt></i></span></dt><dd>
Specifies a pointer to 16 consecutive values, which are used as the elements of a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
<mml:mrow>
<mml:mn>4</mml:mn>
<mml:mo></mml:mo>
<mml:mn>4</mml:mn>
</mml:mrow>
</mml:math> column-major matrix.
</dd></dl></div></div><div class="refsect1" lang="en"><a name="glLoadMatrix.3G-description"/><h2>Description</h2><p>
<tt>glLoadMatrix</tt> replaces the current matrix with the one whose elements are
specified by <i><tt>m</tt></i>. The current matrix is the projection matrix, modelview matrix, or texture
matrix, depending on the current matrix mode (see <a href="glMatrixMode.3G.xml">glMatrixMode</a>).
</p><p>
The current matrix, M, defines a transformation of coordinates. For instance, assume M refers to the modelview matrix.
If <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
<mml:mi>v</mml:mi>
<mml:mo>=</mml:mo>
<mml:mfenced separator=",">
<mml:mrow>
<mml:mi>v</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>0</mml:mn>
</mml:mfenced>
</mml:mrow>
<mml:mrow>
<mml:mi>v</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>1</mml:mn>
</mml:mfenced>
</mml:mrow>
<mml:mrow>
<mml:mi>v</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>2</mml:mn>
</mml:mfenced>
</mml:mrow>
<mml:mrow>
<mml:mi>v</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>3</mml:mn>
</mml:mfenced>
</mml:mrow>
</mml:mfenced>
</mml:math> is the set of object coordinates of a vertex, and <i><tt>m</tt></i> points to an array of
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
<mml:mn>16</mml:mn>
</mml:math> single- or double-precision floating-point values <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
<mml:mfenced separator="," open="" close="">
<mml:mrow>
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>0</mml:mn>
</mml:mfenced>
</mml:mrow>
<mml:mrow>
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>1</mml:mn>
</mml:mfenced>
</mml:mrow>
…
<mml:mrow>
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>15</mml:mn>
</mml:mfenced>
</mml:mrow>
</mml:mfenced>
</mml:math>, then the modelview transformation <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
<mml:mrow>
<mml:mi>M</mml:mi>
<mml:mfenced separator=",">
<mml:mi>v</mml:mi>
</mml:mfenced>
</mml:mrow>
</mml:math> does the following:
</p><p>
</p><div class="informalequation"><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" mode="display" overflow="scroll">
<mml:mrow>
<mml:mi>M</mml:mi>
<mml:mfenced separator=",">
<mml:mi>v</mml:mi>
</mml:mfenced>
<mml:mo>=</mml:mo>
<mml:mfenced separator=",">
<mml:mtable>
<mml:mtr>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>0</mml:mn>
</mml:mfenced>
</mml:mtd>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>4</mml:mn>
</mml:mfenced>
</mml:mtd>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>8</mml:mn>
</mml:mfenced>
</mml:mtd>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>12</mml:mn>
</mml:mfenced>
</mml:mtd>
</mml:mtr>
<mml:mtr>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>1</mml:mn>
</mml:mfenced>
</mml:mtd>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>5</mml:mn>
</mml:mfenced>
</mml:mtd>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>9</mml:mn>
</mml:mfenced>
</mml:mtd>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>13</mml:mn>
</mml:mfenced>
</mml:mtd>
</mml:mtr>
<mml:mtr>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>2</mml:mn>
</mml:mfenced>
</mml:mtd>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>6</mml:mn>
</mml:mfenced>
</mml:mtd>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>10</mml:mn>
</mml:mfenced>
</mml:mtd>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>14</mml:mn>
</mml:mfenced>
</mml:mtd>
</mml:mtr>
<mml:mtr>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>3</mml:mn>
</mml:mfenced>
</mml:mtd>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>7</mml:mn>
</mml:mfenced>
</mml:mtd>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>11</mml:mn>
</mml:mfenced>
</mml:mtd>
<mml:mtd columnalign="center">
<mml:mi>m</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>15</mml:mn>
</mml:mfenced>
</mml:mtd>
</mml:mtr>
</mml:mtable>
</mml:mfenced>
<mml:mo></mml:mo>
<mml:mfenced separator=",">
<mml:mtable>
<mml:mtr>
<mml:mtd columnalign="center">
<mml:mi>v</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>0</mml:mn>
</mml:mfenced>
</mml:mtd>
</mml:mtr>
<mml:mtr>
<mml:mtd columnalign="center">
<mml:mi>v</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>1</mml:mn>
</mml:mfenced>
</mml:mtd>
</mml:mtr>
<mml:mtr>
<mml:mtd columnalign="center">
<mml:mi>v</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>2</mml:mn>
</mml:mfenced>
</mml:mtd>
</mml:mtr>
<mml:mtr>
<mml:mtd columnalign="center">
<mml:mi>v</mml:mi>
<mml:mfenced separator="," open="[" close="]">
<mml:mn>3</mml:mn>
</mml:mfenced>
</mml:mtd>
</mml:mtr>
</mml:mtable>
</mml:mfenced>
</mml:mrow>
</mml:math></div><p>
</p><p>
Where "<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
<mml:mo></mml:mo>
</mml:math>" denotes matrix multiplication.
</p><p>
Projection and texture transformations are similarly defined.
</p></div><div class="refsect1" lang="en"><a name="glLoadMatrix.3G-notes"/><h2>Notes</h2><p>
While the elements of the matrix may be specified with single or double precision, the GL implementation may store or
operate on these values in less than single precision.
</p></div><div class="refsect1" lang="en"><a name="glLoadMatrix.3G-errors"/><h2>Errors</h2><p>
<tt>GL_INVALID_OPERATION</tt> is generated if <tt>glLoadMatrix</tt> is
executed between the execution of <a href="glBegin.3G.xml"><tt>glBegin</tt></a> and the corresponding execution of
<a href="glBegin.3G.xml"><tt>glEnd</tt></a>.
</p></div><div class="refsect1" lang="en"><a name="glLoadMatrix.3G-associated_gets"/><h2>Associated Gets</h2><p>
<tt>glGet</tt> with argument <tt>GL_MATRIX_MODE</tt>
</p><p>
<tt>glGet</tt> with argument <tt>GL_COLOR_MATRIX</tt>
</p><p>
<tt>glGet</tt> with argument <tt>GL_MODELVIEW_MATRIX</tt>
</p><p>
<tt>glGet</tt> with argument <tt>GL_PROJECTION_MATRIX</tt>
</p><p>
<tt>glGet</tt> with argument <tt>GL_TEXTURE_MATRIX</tt>
</p></div><div class="refsect1" lang="en"><a name="glLoadMatrix.3G-see_also"/><h2>See Also</h2><p>
<span class="simplelist"><a href="glLoadIdentity.3G.xml">glLoadIdentity</a>, <a href="glMatrixMode.3G.xml">glMatrixMode</a>, <a href="glMultMatrix.3G.xml">glMultMatrix</a>, <a href="glPushMatrix.3G.xml">glPushMatrix</a></span>
</p></div></div><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="glLoadIdentity.3G.xml">Prev</a></td><td width="20%" align="center"><a accesskey="u" href="reference-GL.xml">Up</a></td><td width="40%" align="right"><a accesskey="n" href="glLoadName.3G.xml">Next</a></td></tr><tr><td width="40%" align="left" valign="top">glLoadIdentity</td><td width="20%" align="center"><a accesskey="h" href="index.xml">Home</a></td><td width="40%" align="right" valign="top">glLoadName</td></tr></table></div></body></html>
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