<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN" "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd"> <refentry id="glMatrixMode"> <refmeta> <refmetainfo> <copyright> <year>1991-2006</year> <holder>Silicon Graphics, Inc.</holder> </copyright> </refmetainfo> <refentrytitle>glMatrixMode</refentrytitle> <manvolnum>3G</manvolnum> </refmeta> <refnamediv> <refname>glMatrixMode</refname> <refpurpose>specify which matrix is the current matrix</refpurpose> </refnamediv> <refsynopsisdiv><title>C Specification</title> <funcsynopsis> <funcprototype> <funcdef>void <function>glMatrixMode</function></funcdef> <paramdef>GLenum <parameter>mode</parameter></paramdef> </funcprototype> </funcsynopsis> </refsynopsisdiv> <refsect1 id="parameters"><title>Parameters</title> <variablelist> <varlistentry> <term><parameter>mode</parameter></term> <listitem> <para> Specifies which matrix stack is the target for subsequent matrix operations. Three values are accepted: <constant>GL_MODELVIEW</constant>, <constant>GL_PROJECTION</constant>, and <constant>GL_TEXTURE</constant>. The initial value is <constant>GL_MODELVIEW</constant>. Additionally, if the <code>ARB_imaging</code> extension is supported, <constant>GL_COLOR</constant> is also accepted. </para> </listitem> </varlistentry> </variablelist> </refsect1> <refsect1 id="description"><title>Description</title> <para> <function>glMatrixMode</function> sets the current matrix mode. <parameter>mode</parameter> can assume one of four values: </para> <variablelist> <varlistentry> <term><constant>GL_MODELVIEW</constant></term> <listitem> <para> Applies subsequent matrix operations to the modelview matrix stack. </para> </listitem> </varlistentry> <varlistentry> <term><constant>GL_PROJECTION</constant></term> <listitem> <para> Applies subsequent matrix operations to the projection matrix stack. </para> </listitem> </varlistentry> <varlistentry> <term><constant>GL_TEXTURE</constant></term> <listitem> <para> Applies subsequent matrix operations to the texture matrix stack. </para> </listitem> </varlistentry> <varlistentry> <term><constant>GL_COLOR</constant></term> <listitem> <para> Applies subsequent matrix operations to the color matrix stack. </para> </listitem> </varlistentry> </variablelist> <para> To find out which matrix stack is currently the target of all matrix operations, call <citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_MATRIX_MODE</constant>. The initial value is <constant>GL_MODELVIEW</constant>. </para> </refsect1> <refsect1 id="errors"><title>Errors</title> <para> <constant>GL_INVALID_ENUM</constant> is generated if <parameter>mode</parameter> is not an accepted value. </para> <para> <constant>GL_INVALID_OPERATION</constant> is generated if <function>glMatrixMode</function> is executed between the execution of <citerefentry><refentrytitle>glBegin</refentrytitle></citerefentry> and the corresponding execution of <citerefentry><refentrytitle>glEnd</refentrytitle></citerefentry>. </para> </refsect1> <refsect1 id="associatedgets"><title>Associated Gets</title> <para> <citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_MATRIX_MODE</constant> </para> </refsect1> <refsect1 id="seealso"><title>See Also</title> <para> <citerefentry><refentrytitle>glLoadMatrix</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glLoadTransposeMatrix</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glMultMatrix</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glMultTransposeMatrix</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glPopMatrix</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glPushMatrix</refentrytitle></citerefentry> </para> </refsect1> <refsect1 id="Copyright"><title>Copyright</title> <para> Copyright <trademark class="copyright"></trademark> 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see <ulink url="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</ulink>. </para> </refsect1> </refentry>