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><head><title>glPushMatrix</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="glPushClientAttrib.3G.xml" title="glPushClientAttrib"/><link rel="next" href="glPushName.3G.xml" title="glPushName"/></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">glPushMatrix</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="glPushClientAttrib.3G.xml">Prev</a> </td><th width="60%" align="center">GL</th><td width="20%" align="right"> <a accesskey="n" href="glPushName.3G.xml">Next</a></td></tr></table><hr/></div><div class="refentry" lang="en"><a name="glPushMatrix.3G"/><div class="titlepage"/><div class="refnamediv"><a name="glPushMatrix.3G-name"/><h2>Name</h2><p>glPushMatrix, glPopMatrix &#8212; push and pop the current matrix stack</p></div><div class="refsynopsisdiv"><a name="glPushMatrix.3G-c_spec-push"/><h2>C Specification</h2><table class="funcprototype" border="0" cellpadding="0" cellspacing="0"><tr><td valign="top"><code>void <tt>glPushMatrix</tt></code></td><td valign="top"><code>(</code></td><td valign="top"><code>);</code></td></tr></table></div><div class="refsynopsisdiv"><a name="glPushMatrix.3G-python_spec-push"/><h2>Python Specification</h2><table class="funcprototype" border="0" cellpadding="0" cellspacing="0"><tr><td valign="top"><code><tt>glPushMatrix</tt></code></td><td valign="top"><code>(</code></td><td valign="top"><code>) &#8594; <tt>None</tt></code></td></tr></table></div><div class="refsynopsisdiv"><a name="glPushMatrix.3G-c_spec-pop"/><h2>C Specification</h2><table class="funcprototype" border="0" cellpadding="0" cellspacing="0"><tr><td valign="top"><code>void <tt>glPopMatrix</tt></code></td><td valign="top"><code>(</code></td><td valign="top"><code>);</code></td></tr></table></div><div class="refsynopsisdiv"><a name="glPushMatrix.3G-python_spec-pop"/><h2>Python Specification</h2><table class="funcprototype" border="0" cellpadding="0" cellspacing="0"><tr><td valign="top"><code><tt>glPopMatrix</tt></code></td><td valign="top"><code>(</code></td><td valign="top"><code>) &#8594; <tt>None</tt></code></td></tr></table></div><div class="refsect1" lang="en"><a name="glPushMatrix.3G-description"/><h2>Description</h2><p>
			There is a stack of matrices for each of the matrix modes. In <tt>GL_MODELVIEW</tt> mode, the stack depth
			is at least 32. In the other modes, <tt>GL_COLOR</tt>, const(PROJECTION), and
			<tt>GL_TEXTURE</tt>, the depth is at least 2. The current matrix in any mode is the matrix on the top of
			the stack for that mode.
		</p><p>
			<tt>glPushMatrix</tt> pushes the current matrix stack down by one, duplicating the current matrix. That is,
			after a <tt>glPushMatrix</tt> call, the matrix on top of the stack is identical to the one below it.
		</p><p>
			<tt>glPopMatrix</tt> pops the current matrix stack, replacing the current matrix with the one below it on
			the stack.
		</p><p>
			Initially, each of the stacks contains one matrix, an identity matrix.
		</p><p>
			It is an error to push a full matrix stack, or to pop a matrix stack that contains only a single matrix. In either
			case, the error flag is set and no other change is made to GL state.
		</p></div><div class="refsect1" lang="en"><a name="glPushMatrix.3G-errors"/><h2>Errors</h2><p>
			<tt>GL_STACK_OVERFLOW</tt> is generated if <tt>glPushMatrix</tt> is called while the current
			matrix stack is full.
		</p><p>
			<tt>GL_STACK_UNDERFLOW</tt> is generated if <tt>glPopMatrix</tt> is called while the current
			matrix stack contains only a single matrix.
		</p><p>
			<tt>GL_INVALID_OPERATION</tt> is generated if <tt>glPushMatrix</tt> or
			<tt>glPopMatrix</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="glPushMatrix.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><p>
			<tt>glGet</tt> with argument <tt>GL_COLOR_STACK_DEPTH</tt>
		</p><p>
			<tt>glGet</tt> with argument <tt>GL_MODELVIEW_STACK_DEPTH</tt>
		</p><p>
			<tt>glGet</tt> with argument <tt>GL_PROJECTION_STACK_DEPTH</tt>
		</p><p>
			<tt>glGet</tt> with argument <tt>GL_TEXTURE_STACK_DEPTH</tt>
		</p><p>
			<tt>glGet</tt> with argument <tt>GL_MAX_MODELVIEW_STACK_DEPTH</tt>
		</p><p>
			<tt>glGet</tt> with argument <tt>GL_MAX_PROJECTION_STACK_DEPTH</tt>
		</p><p>
			<tt>glGet</tt> with argument <tt>GL_MAX_TEXTURE_STACK_DEPTH</tt>
		</p></div><div class="refsect1" lang="en"><a name="glPushMatrix.3G-see_also"/><h2>See Also</h2><p>
			<span class="simplelist"><a href="glFrustum.3G.xml">glFrustum</a>, <a href="glLoadIdentity.3G.xml">glLoadIdentity</a>, <a href="glLoadMatrix.3G.xml">glLoadMatrix</a>, <a href="glMatrixMode.3G.xml">glMatrixMode</a>, <a href="glMultMatrix.3G.xml">glMultMatrix</a>, <a href="glOrtho.3G.xml">glOrtho</a>, <a href="glRotate.3G.xml">glRotate</a>, <a href="glScale.3G.xml">glScale</a>, <a href="glTranslate.3G.xml">glTranslate</a>, <a href="glViewport.3G.xml">glViewport</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="glPushClientAttrib.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="glPushName.3G.xml">Next</a></td></tr><tr><td width="40%" align="left" valign="top">glPushClientAttrib </td><td width="20%" align="center"><a accesskey="h" href="index.xml">Home</a></td><td width="40%" align="right" valign="top"> glPushName</td></tr></table></div></body></html>