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<?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>gluOrtho2D</title><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /></head><body><div class="refentry"><a id="gluOrtho2D"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>gluOrtho2D — define a 2D orthographic projection matrix</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void <strong class="fsfunc">gluOrtho2D</strong>(</code></td><td>GLdouble <var class="pdparam">left</var>, </td></tr><tr><td> </td><td>GLdouble <var class="pdparam">right</var>, </td></tr><tr><td> </td><td>GLdouble <var class="pdparam">bottom</var>, </td></tr><tr><td> </td><td>GLdouble <var class="pdparam">top</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>left</code></em>, </span><span class="term"><em class="parameter"><code>right</code></em></span></dt><dd><p>
                    Specify the coordinates for the left and right vertical clipping planes.
                </p></dd><dt><span class="term"><em class="parameter"><code>bottom</code></em>, </span><span class="term"><em class="parameter"><code>top</code></em></span></dt><dd><p>
                    Specify the coordinates for the bottom and top horizontal clipping planes.
                </p></dd></dl></div></div><div class="refsect1"><a id="description"></a><h2>Description</h2><p>
            <code class="function">gluOrtho2D</code> sets up a two-dimensional orthographic viewing region.  
            This is equivalent to calling <a class="citerefentry" href="glOrtho.xml"><span class="citerefentry"><span class="refentrytitle">glOrtho</span></span></a> with 
            <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
                
                <mml:mrow>
                    <mml:mi mathvariant="italic">near</mml:mi>
                    <mml:mo>=</mml:mo>
                    <mml:mn>-1</mml:mn>
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            </mml:math>
            and 
            <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
                
                <mml:mrow>
                    <mml:mi mathvariant="italic">far</mml:mi>
                    <mml:mo>=</mml:mo>
                    <mml:mn>1</mml:mn>
                </mml:mrow>
            </mml:math>.
        </p></div><div class="refsect1"><a id="seealso"></a><h2>See Also</h2><p>
            <a class="citerefentry" href="glOrtho.xml"><span class="citerefentry"><span class="refentrytitle">glOrtho</span></span></a>,
            <a class="citerefentry" href="gluPerspective.xml"><span class="citerefentry"><span class="refentrytitle">gluPerspective</span></span></a>
        </p></div><div class="refsect1"><a id="Copyright"></a><h2>Copyright</h2><p>
            Copyright <span class="trademark"></span>© 1991-2006
            Silicon Graphics, Inc. This document is licensed under the SGI
            Free Software B License. For details, see
            <a class="ulink" href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.
        </p></div></div></body></html>