368 lines
16 KiB
XML
368 lines
16 KiB
XML
<?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="glTexCoord">
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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>glTexCoord</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glTexCoord</refname>
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<refpurpose>set the current texture coordinates</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>glTexCoord1s</function></funcdef>
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<paramdef>GLshort <parameter>s</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord1i</function></funcdef>
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<paramdef>GLint <parameter>s</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord1f</function></funcdef>
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<paramdef>GLfloat <parameter>s</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord1d</function></funcdef>
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<paramdef>GLdouble <parameter>s</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord2s</function></funcdef>
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<paramdef>GLshort <parameter>s</parameter></paramdef>
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<paramdef>GLshort <parameter>t</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord2i</function></funcdef>
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<paramdef>GLint <parameter>s</parameter></paramdef>
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<paramdef>GLint <parameter>t</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord2f</function></funcdef>
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<paramdef>GLfloat <parameter>s</parameter></paramdef>
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<paramdef>GLfloat <parameter>t</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord2d</function></funcdef>
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<paramdef>GLdouble <parameter>s</parameter></paramdef>
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<paramdef>GLdouble <parameter>t</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord3s</function></funcdef>
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<paramdef>GLshort <parameter>s</parameter></paramdef>
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<paramdef>GLshort <parameter>t</parameter></paramdef>
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<paramdef>GLshort <parameter>r</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord3i</function></funcdef>
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<paramdef>GLint <parameter>s</parameter></paramdef>
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<paramdef>GLint <parameter>t</parameter></paramdef>
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<paramdef>GLint <parameter>r</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord3f</function></funcdef>
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<paramdef>GLfloat <parameter>s</parameter></paramdef>
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<paramdef>GLfloat <parameter>t</parameter></paramdef>
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<paramdef>GLfloat <parameter>r</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord3d</function></funcdef>
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<paramdef>GLdouble <parameter>s</parameter></paramdef>
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<paramdef>GLdouble <parameter>t</parameter></paramdef>
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<paramdef>GLdouble <parameter>r</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord4s</function></funcdef>
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<paramdef>GLshort <parameter>s</parameter></paramdef>
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<paramdef>GLshort <parameter>t</parameter></paramdef>
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<paramdef>GLshort <parameter>r</parameter></paramdef>
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<paramdef>GLshort <parameter>q</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord4i</function></funcdef>
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<paramdef>GLint <parameter>s</parameter></paramdef>
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<paramdef>GLint <parameter>t</parameter></paramdef>
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<paramdef>GLint <parameter>r</parameter></paramdef>
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<paramdef>GLint <parameter>q</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord4f</function></funcdef>
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<paramdef>GLfloat <parameter>s</parameter></paramdef>
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<paramdef>GLfloat <parameter>t</parameter></paramdef>
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<paramdef>GLfloat <parameter>r</parameter></paramdef>
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<paramdef>GLfloat <parameter>q</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord4d</function></funcdef>
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<paramdef>GLdouble <parameter>s</parameter></paramdef>
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<paramdef>GLdouble <parameter>t</parameter></paramdef>
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<paramdef>GLdouble <parameter>r</parameter></paramdef>
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<paramdef>GLdouble <parameter>q</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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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>s</parameter></term>
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<term><parameter>t</parameter></term>
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<term><parameter>r</parameter></term>
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<term><parameter>q</parameter></term>
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<listitem>
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<para>
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Specify <emphasis>s</emphasis>, <emphasis>t</emphasis>, <emphasis>r</emphasis>, and <emphasis>q</emphasis> texture coordinates.
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Not all parameters are present in all forms of the command.
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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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<refsynopsisdiv><title>C Specification</title>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord1sv</function></funcdef>
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<paramdef>const GLshort * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord1iv</function></funcdef>
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<paramdef>const GLint * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord1fv</function></funcdef>
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<paramdef>const GLfloat * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord1dv</function></funcdef>
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<paramdef>const GLdouble * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord2sv</function></funcdef>
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<paramdef>const GLshort * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord2iv</function></funcdef>
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<paramdef>const GLint * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord2fv</function></funcdef>
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<paramdef>const GLfloat * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord2dv</function></funcdef>
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<paramdef>const GLdouble * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord3sv</function></funcdef>
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<paramdef>const GLshort * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord3iv</function></funcdef>
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<paramdef>const GLint * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord3fv</function></funcdef>
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<paramdef>const GLfloat * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord3dv</function></funcdef>
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<paramdef>const GLdouble * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord4sv</function></funcdef>
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<paramdef>const GLshort * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord4iv</function></funcdef>
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<paramdef>const GLint * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord4fv</function></funcdef>
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<paramdef>const GLfloat * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glTexCoord4dv</function></funcdef>
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<paramdef>const GLdouble * <parameter>v</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1 id="parameters2"><title>Parameters</title>
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<variablelist>
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<varlistentry>
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<term><parameter>v</parameter></term>
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<listitem>
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<para>
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Specifies a pointer to an array of one, two, three, or four elements,
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which in turn specify the
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<emphasis>s</emphasis>,
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<emphasis>t</emphasis>,
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<emphasis>r</emphasis>, and
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<emphasis>q</emphasis> texture coordinates.
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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>glTexCoord</function> specifies texture coordinates in
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one,
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two,
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three, or
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four dimensions.
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<function>glTexCoord1</function> sets the current texture coordinates to
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<inlineequation><mml:math>
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<!-- eqn: (s, 0, 0, 1):-->
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<mml:mfenced open="(" close=")">
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<mml:mi mathvariant="italic">s</mml:mi>
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<mml:mn>0</mml:mn>
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<mml:mn>0</mml:mn>
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<mml:mn>1</mml:mn>
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</mml:mfenced>
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</mml:math></inlineequation>;
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a call to
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<function>glTexCoord2</function> sets them to
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<inlineequation><mml:math>
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<!-- eqn: (s, t, 0, 1):-->
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<mml:mfenced open="(" close=")">
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<mml:mi mathvariant="italic">s</mml:mi>
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<mml:mi mathvariant="italic">t</mml:mi>
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<mml:mn>0</mml:mn>
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<mml:mn>1</mml:mn>
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</mml:mfenced>
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</mml:math></inlineequation>.
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Similarly, <function>glTexCoord3</function> specifies the texture coordinates as
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<inlineequation><mml:math>
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<!-- eqn: (s, t, r, 1):-->
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<mml:mfenced open="(" close=")">
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<mml:mi mathvariant="italic">s</mml:mi>
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<mml:mi mathvariant="italic">t</mml:mi>
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<mml:mi mathvariant="italic">r</mml:mi>
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<mml:mn>1</mml:mn>
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</mml:mfenced>
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</mml:math></inlineequation>,
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and
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<function>glTexCoord4</function> defines all four components explicitly as
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<inlineequation><mml:math>
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<!-- eqn: (s, t, r, q):-->
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<mml:mfenced open="(" close=")">
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<mml:mi mathvariant="italic">s</mml:mi>
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<mml:mi mathvariant="italic">t</mml:mi>
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<mml:mi mathvariant="italic">r</mml:mi>
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<mml:mi mathvariant="italic">q</mml:mi>
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</mml:mfenced>
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</mml:math></inlineequation>.
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</para>
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<para>
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The current texture coordinates are part of the data
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that is associated with each vertex and with the current
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raster position.
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Initially, the values for
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<emphasis>s</emphasis>,
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<emphasis>t</emphasis>,
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<emphasis>r</emphasis>, and
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<emphasis>q</emphasis>
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are (0, 0, 0, 1).
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</para>
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<para>
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</para>
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</refsect1>
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<refsect1 id="notes"><title>Notes</title>
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<para>
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The current texture coordinates can be updated at any time.
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In particular,
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<function>glTexCoord</function> can be called between a call to <citerefentry><refentrytitle>glBegin</refentrytitle></citerefentry> and the corresponding
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call to <citerefentry><refentrytitle>glEnd</refentrytitle></citerefentry>.
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</para>
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<para>
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When the <code>ARB_imaging</code> extension is supported, <function>glTexCoord</function> always
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updates texture unit <constant>GL_TEXTURE0</constant>.
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</para>
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</refsect1>
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<refsect1 id="associatedgets"><title>Associated Gets</title>
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<para>
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<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_CURRENT_TEXTURE_COORDS</constant>
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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>glMultiTexCoord</refentrytitle></citerefentry>,
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<function>glTexCoordPointer</function>,
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<citerefentry><refentrytitle>glVertex</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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