<div class="refentry" id="glDepthRangef">

<div class="titlepage"></div>

<div class="refnamediv">

<h2>Name</h2>

<p>glDepthRangef — specify mapping of depth values from normalized device coordinates to window coordinates</p>

</div>

<div class="refsynopsisdiv">

<h2>C Specification</h2>

<div class="funcsynopsis">

<table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">

<tr>

<td>

<code class="funcdef">void <strong class="fsfunc">glDepthRangef</strong>(</code>

</td>

<td>GLfloat <var class="pdparam">n</var>, </td>

</tr>

<tr>

<td> </td>

<td>GLfloat <var class="pdparam">f</var><code>)</code>;</td>

</tr>

</table>

<div class="funcprototype-spacer"> </div>

</div>

</div>

<div class="refsect1" id="parameters">

<h2>Parameters</h2>

<div class="variablelist">

<dl class="variablelist">

<dt>

<span class="term">

<em class="parameter">

<code>n</code>

</em>

</span>

</dt>

<dd>

<p>

Specifies the mapping of the near clipping plane to window coordinates.

The initial value is 0.

</p>

</dd>

<dt>

<span class="term">

<em class="parameter">

<code>f</code>

</em>

</span>

</dt>

<dd>

<p>

Specifies the mapping of the far clipping plane to window coordinates.

The initial value is 1.

</p>

</dd>

</dl>

</div>

</div>

<div class="refsect1" id="description">

<h2>Description</h2>

<p>

After clipping and division by <span class="emphasis"><em>w</em></span>,

depth coordinates range from

<math overflow="scroll">

<mn>-1</mn>

</math>

to 1,

corresponding to the near and far clipping planes.

<code class="function">glDepthRangef</code> specifies a linear mapping of the normalized depth coordinates

in this range to window depth coordinates.

If a fixed-point depth representation is used, the parameters <em class="parameter"><code>n</code></em> and <em class="parameter"><code>f</code></em>

are clamped to the range [0 to 1] when computing window z.

</p>

<p>

The setting of (0,1) maps the near plane to 0 and

the far plane to 1.

With this mapping,

the depth buffer range is fully utilized.

</p>

</div>

<div class="refsect1" id="notes">

<h2>Notes</h2>

<p>

It is not necessary that <em class="parameter"><code>n</code></em> be less than <em class="parameter"><code>f</code></em>.

Reverse mappings such as

<math overflow="scroll">

<mrow>

<mi mathvariant="italic">n</mi>

<mo>=</mo>

<mn>1</mn>

</mrow>

</math>,

and

<math overflow="scroll">

<mrow>

<mi mathvariant="italic">f</mi>

<mo>=</mo>

<mn>0</mn>

</mrow>

</math>

are acceptable.

</p>

</div>

<div class="refsect1" id="associatedgets">

<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_DEPTH_RANGE</code>

</p>

</div>

{$pipelinestall}{$examples}

<div class="refsect1" id="versions">

<h2>API Version Support</h2>

<div class="informaltable">

<table style="border-collapse: collapse; border-top: 2px solid ; border-bottom: 2px solid ; border-left: 2px solid ; border-right: 2px solid ; ">

<colgroup>

<col style="text-align: left; "/>

<col style="text-align: center; " class="firstvers"/>

<col style="text-align: center; "/>

<col style="text-align: center; " class="lastvers"/>

</colgroup>

<thead>

<tr>

<th style="text-align: left; border-right: 2px solid ; ">

</th>

<th style="text-align: center; border-bottom: 2px solid ; " colspan="3">

<span class="bold"><strong>OpenGL ES API Version</strong></span>

</th>

</tr>

<tr>

<th style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">

<span class="bold"><strong>Function Name</strong></span>

</th>

<th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">

<span class="bold"><strong>2.0</strong></span>

</th>

<th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">

<span class="bold"><strong>3.0</strong></span>

</th>

<th style="text-align: center; border-bottom: 2px solid ; ">

<span class="bold"><strong>3.1</strong></span>

</th>

</tr>

</thead>

<tbody>

<tr>

<td style="text-align: left; border-right: 2px solid ; ">glDepthRangef</td>

<td style="text-align: center; border-right: 2px solid ; ">✔</td>

<td style="text-align: center; border-right: 2px solid ; ">✔</td>

<td style="text-align: center; ">✔</td>

</tr>

</tbody>

</table>

</div>

</div>

<div class="refsect1" id="seealso">

<h2>See Also</h2>

<p>

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

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

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

</p>

</div>

<div class="refsect1" id="Copyright">

<h2>Copyright</h2>

<p>

Copyright © 1991-2006 Silicon Graphics, Inc.

Copyright © 2010-2014 Khronos Group.

This document is licensed under the SGI Free Software B License.

For details, see

<a class="link" 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>