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1 | <?xml version="1.0" encoding="UTF-8"?> |
2 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd"> | |
3 | <!-- saved from url=(0013)about:internet --> | |
4 | <?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" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>glClearColor - OpenGL 4 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glClearColor"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glClearColor — specify clear values for the color buffers</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glClearColor</b>(</code></td><td>GLfloat </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLfloat </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLfloat </td><td><var class="pdparam">blue</var>, </td></tr><tr><td> </td><td>GLfloat </td><td><var class="pdparam">alpha</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>red</code></em>, </span><span class="term"><em class="parameter"><code>green</code></em>, </span><span class="term"><em class="parameter"><code>blue</code></em>, </span><span class="term"><em class="parameter"><code>alpha</code></em></span></dt><dd><p> | |
5 | Specify the red, green, blue, and alpha values used when the | |
6 | color buffers are cleared. | |
7 | The initial values are all 0. | |
8 | </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p> | |
9 | <code class="function">glClearColor</code> specifies the red, | |
10 | green, | |
11 | blue, | |
12 | and alpha values used by <a href="glClear.xml"><span class="citerefentry"><span class="refentrytitle">glClear</span></span></a> to clear the color buffers. | |
13 | Values specified by <code class="function">glClearColor</code> are clamped to the range | |
14 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
15 | ||
16 | <mml:mfenced open="[" close="]"> | |
17 | <mml:mn>0</mml:mn> | |
18 | <mml:mn>1</mml:mn> | |
19 | </mml:mfenced> | |
20 | </mml:math>. | |
21 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p> | |
22 | The type of the <em class="parameter"><code>red</code></em>, | |
23 | <em class="parameter"><code>green</code></em>, <em class="parameter"><code>blue</code></em>, | |
24 | and <em class="parameter"><code>alpha</code></em> parameters was changed from | |
25 | GLclampf to GLfloat. This change is transparent to user code | |
26 | and is described in detail on the | |
27 | <a href="removedTypes.xml"><span class="citerefentry"><span class="refentrytitle">removedTypes</span></span></a> | |
28 | page. | |
29 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p> | |
30 | <a href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_COLOR_CLEAR_VALUE</code> | |
31 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p> | |
32 | <a href="glClear.xml"><span class="citerefentry"><span class="refentrytitle">glClear</span></span></a>, | |
33 | <a href="removedTypes.xml"><span class="citerefentry"><span class="refentrytitle">removedTypes</span></span></a> | |
34 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p> | |
35 | Copyright <span class="trademark"></span>© 1991-2006 | |
36 | Silicon Graphics, Inc. This document is licensed under the SGI | |
37 | Free Software B License. For details, see | |
38 | <a href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>. | |
39 | </p></div></div></body></html> |