<div class="refentry" title="glClearColor"><a id="glClearColor"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glClearColor — specify clear values for the color buffer</p></div><div class="refsynopsisdiv" title="C Specification"><h2>C Specification</h2><div class="funcsynopsis"><table class="funcprototype-table"><tr><td><code class="funcdef">void <b class="fsfunc">glClearColor</b>(</code></td><td>GLclampf <var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLclampf <var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLclampf <var class="pdparam">blue</var>, </td></tr><tr><td> </td><td>GLclampf <var class="pdparam">alpha</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table class="funcprototype-table"><tr><td><code class="funcdef">void <b class="fsfunc">glClearColorx</b>(</code></td><td>GLclampx <var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLclampx <var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLclampx <var class="pdparam">blue</var>, </td></tr><tr><td> </td><td>GLclampx <var class="pdparam">alpha</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Parameters"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term">

<em class="parameter"><code>red</code></em>,

<em class="parameter"><code>green</code></em>,

<em class="parameter"><code>blue</code></em>,

<em class="parameter"><code>alpha</code></em>

</span></dt><dd><p>Specify the red, green, blue, and alpha values used

when the color buffer is cleared. The initial values

are all 0.</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="description"></a><h2>Description</h2><p>

<code class="function">glClearColor</code>

specifies the red, green, blue, and alpha values used by

<a class="citerefentry" href="glClear"><span class="citerefentry"><span class="refentrytitle">glClear</span></span></a>

to clear the color buffer. Values specified by

<code class="function">glClearColor</code>

are clamped to the range [0, 1].</p></div><div class="refsect1" title="Associated Gets"><a id="associatedgets"></a><h2>Associated Gets</h2><p>

<a class="citerefentry" href="glGet"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_COLOR_CLEAR_VALUE</code>

</p></div><div class="refsect1" title="See Also"><a id="seealso"></a><h2>See Also</h2><p>

<a class="citerefentry" href="glClear"><span class="citerefentry"><span class="refentrytitle">glClear</span></span></a>,

<a class="citerefentry" href="glClearDepth"><span class="citerefentry"><span class="refentrytitle">glClearDepth</span></span></a>,

<a class="citerefentry" href="glClearStencil"><span class="citerefentry"><span class="refentrytitle">glClearStencil</span></span></a>,

<a class="citerefentry" href="glColorMask"><span class="citerefentry"><span class="refentrytitle">glColorMask</span></span></a>

</p></div><div class="refsect1" title="Copyright"><a id="copyright"></a><h2>Copyright</h2><p>

Copyright © 2003-2004

Silicon Graphics, Inc. This document is licensed under the SGI

Free Software B License. For details, see

<a class="ulink" href="https://web.archive.org/web/20171022161616/http://oss.sgi.com/projects/FreeB/" target="_top">https://web.archive.org/web/20171022161616/http://oss.sgi.com/projects/FreeB/</a>.

</p></div></div>