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<?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>gl_TessLevelInner - OpenGL Shading Language (GLSL)</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="gl_TessLevelInner"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>gl_TessLevelInner — contains the inner tessellation levels for the current patch</p></div><div class="refsynopsisdiv"><h2>Declaration</h2><div class="funcsynopsis"><code class="function">patch out float gl_TessLevelInner[2];</code> (tessellation control language)<br /><code class="function">patch in float gl_TessLevelInner[2];</code> (tessellation evaluation languge)
        </div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
            Available only in the tessellation control and evaluation languages, <code class="function">gl_TessLevelInner</code>
            is used to assign values to the corresponding inner tesellation levels of the current patch. The values written
            into <code class="function">gl_TessLevelInner</code> by the tessellation control shader are used by the tessellation
            primitive generator to control primitive tessellation and may be read by the subsequent tessellation evaluation shader.
        </p><p>
            As inputs to the tessellation evaluation shader, <code class="function">gl_TessLevelInner</code> contains the values
            written by the tessellation control shader, if present. If no tessellation control shader is present, it
            contains the default tessellation level.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="versions"></a><h2>Version Support</h2><div class="informaltable"><table border="1"><colgroup><col align="left" /><col align="center" /><col align="center" /></colgroup><thead><tr><th align="left"><span class="bold"><strong>
                        Variable
                        </strong></span></th><th align="left"><span class="bold"><strong>
                        Version 1.10
                        </strong></span></th><th align="left"><span class="bold"><strong>
                        Version 1.20
                        </strong></span></th><th align="left"><span class="bold"><strong>
                        Version 1.30
                        </strong></span></th><th align="left"><span class="bold"><strong>
                        Version 1.40
                        </strong></span></th><th align="left"><span class="bold"><strong>
                        Version 1.50
                        </strong></span></th><th align="left"><span class="bold"><strong>
                        Version 3.30
                        </strong></span></th><th align="left"><span class="bold"><strong>
                        Version 4.00
                        </strong></span></th><th align="left"><span class="bold"><strong>
                        Version 4.10
                        </strong></span></th></tr><tr><th align="left">
                            gl_TessLevelInner
                        </th><th align="center">
                            <span class="emphasis"><em>-</em></span>  
                        </th><th align="center">
                            <span class="emphasis"><em>-</em></span>  
                        </th><th align="center">
                            <span class="emphasis"><em>-</em></span>  
                        </th><th align="center">
                            <span class="emphasis"><em>-</em></span>  
                        </th><th align="center">
                            <span class="emphasis"><em>-</em></span>  
                        </th><th align="center">
                            <span class="emphasis"><em>-</em></span>  
                        </th><th align="center">
                            <span class="emphasis"><em>Y</em></span>  
                        </th><th align="center">
                            <span class="emphasis"><em>Y</em></span>  
                        </th></tr></thead></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
            <a href="gl_TessLevelOuter.xml"><span class="citerefentry"><span class="refentrytitle">gl_TessLevelOuter</span></span></a>,
            <a href="gl_TessCoord.xml"><span class="citerefentry"><span class="refentrytitle">gl_TessCoord</span></span></a>
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
            Copyright <span class="trademark"></span>© 2011 Khronos Group. 
            This material may be distributed subject to the terms and conditions set forth in 
            the Open Publication License, v 1.0, 8 June 1999.
            <a href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
        </p></div></div></body></html>
