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91 lines
3.6 KiB
XML
91 lines
3.6 KiB
XML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
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"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
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<refentry id="gluOrtho2D">
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<refmeta>
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<refmetainfo>
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<copyright>
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<year>1991-2006</year>
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<holder>Silicon Graphics, Inc.</holder>
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</copyright>
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</refmetainfo>
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<refentrytitle>gluOrtho2D</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>gluOrtho2D</refname>
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<refpurpose>define a 2D orthographic projection matrix</refpurpose>
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</refnamediv>
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<refsynopsisdiv><title>C Specification</title>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>gluOrtho2D</function></funcdef>
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<paramdef>GLdouble <parameter>left</parameter></paramdef>
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<paramdef>GLdouble <parameter>right</parameter></paramdef>
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<paramdef>GLdouble <parameter>bottom</parameter></paramdef>
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<paramdef>GLdouble <parameter>top</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<!-- eqn: ignoring delim $$ -->
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<refsect1 id="parameters"><title>Parameters</title>
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<variablelist>
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<varlistentry>
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<term><parameter>left</parameter></term>
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<term><parameter>right</parameter></term>
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<listitem>
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<para>
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Specify the coordinates for the left and right vertical clipping planes.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>bottom</parameter></term>
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<term><parameter>top</parameter></term>
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<listitem>
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<para>
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Specify the coordinates for the bottom and top horizontal clipping planes.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 id="description"><title>Description</title>
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<para>
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<function>gluOrtho2D</function> sets up a two-dimensional orthographic viewing region.
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This is equivalent to calling <citerefentry><refentrytitle>glOrtho</refentrytitle></citerefentry> with
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<inlineequation><mml:math>
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<!-- eqn: near = -1:-->
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<mml:mrow>
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<mml:mi mathvariant="italic">near</mml:mi>
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<mml:mo>=</mml:mo>
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<mml:mn>-1</mml:mn>
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</mml:mrow>
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</mml:math></inlineequation>
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and
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<inlineequation><mml:math>
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<!-- eqn: far = 1:-->
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<mml:mrow>
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<mml:mi mathvariant="italic">far</mml:mi>
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<mml:mo>=</mml:mo>
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<mml:mn>1</mml:mn>
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</mml:mrow>
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</mml:math></inlineequation>.
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</para>
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</refsect1>
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<refsect1 id="seealso"><title>See Also</title>
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<para>
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<citerefentry><refentrytitle>glOrtho</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>gluPerspective</refentrytitle></citerefentry>
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</para>
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</refsect1>
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<refsect1 id="Copyright"><title>Copyright</title>
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<para>
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Copyright <trademark class="copyright"></trademark> 1991-2006
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Silicon Graphics, Inc. This document is licensed under the SGI
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Free Software B License. For details, see
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<ulink url="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</ulink>.
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</para>
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</refsect1>
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</refentry>
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