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<title>gl_LocalInvocationID - OpenGL 4 Reference Pages</title>
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<div class="refentry" id="gl_LocalInvocationID">
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<h2>Name</h2>
<p>gl_LocalInvocationID — contains the index of work item currently being operated on by a compute shader</p>
</div>
<div class="refsynopsisdiv">
<h2>Declaration</h2>
<code class="fieldsynopsis"><span class="modifier">in </span><span class="type">uvec3 </span><span class="varname">gl_LocalInvocationID </span>;</code>
</div>
<div class="refsect1" id="description">
<h2>Description</h2>
<p>
In the compute language, <code class="varname">gl_LocalInvocationID</code>
is an input variable containing the n-dimensional index of the local
work invocation within the work group that the current shader is
executing in. The possible values for this variable range across
the local work group size, i.e., (0,0,0) to (<code class="varname">gl_WorkGroupSize.x</code> - 1,
<code class="varname">gl_WorkGroupSize.y</code> - 1, <code class="varname">gl_WorkGroupSize.z</code> - 1).
</p>
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<div class="refsect1" id="versions">
<h2>Version Support</h2>
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<span class="bold"><strong>Variable Name</strong></span>
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<span class="bold"><strong>1.10</strong></span>
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<span class="bold"><strong>1.20</strong></span>
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<span class="bold"><strong>1.30</strong></span>
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<span class="bold"><strong>1.40</strong></span>
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<span class="bold"><strong>1.50</strong></span>
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<span class="bold"><strong>3.30</strong></span>
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<span class="bold"><strong>4.00</strong></span>
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<span class="bold"><strong>4.10</strong></span>
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<span class="bold"><strong>4.20</strong></span>
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<span class="bold"><strong>4.30</strong></span>
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<span class="bold"><strong>4.40</strong></span>
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<span class="bold"><strong>4.50</strong></span>
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<td style="text-align: left; border-right: 2px solid ; ">gl_LocalInvocationID</td>
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<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>
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<div class="refsect1" id="seealso">
<h2>See Also</h2>
<p>
<a class="citerefentry" href="gl_NumWorkGroups.xhtml"><span class="citerefentry"><span class="refentrytitle">gl_NumWorkGroups</span></span></a>,
<a class="citerefentry" href="gl_WorkGroupID.xhtml"><span class="citerefentry"><span class="refentrytitle">gl_WorkGroupID</span></span></a>,
<a class="citerefentry" href="gl_WorkGroupSize.xhtml"><span class="citerefentry"><span class="refentrytitle">gl_WorkGroupSize</span></span></a>,
<a class="citerefentry" href="gl_GlobalInvocationID.xhtml"><span class="citerefentry"><span class="refentrytitle">gl_GlobalInvocationID</span></span></a>
</p>
</div>
<div class="refsect1" id="Copyright">
<h2>Copyright</h2>
<p>
Copyright <span class="trademark"/>© 2011-2014 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 class="link" href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
</p>
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