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<title>gl_WorkGroupID - OpenGL 4 Reference Pages</title>
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<div class="refentry" id="gl_WorkGroupID">
<div class="titlepage"/>
<div class="refnamediv">
<h2>Name</h2>
<p>gl_WorkGroupID — contains the index of the workgroup 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_WorkGroupID </span>;</code>
</div>
<div class="refsect1" id="description">
<h2>Description</h2>
<p>
In the compute language, <code class="varname">gl_WorkGroupID</code>
contains the 3-dimensional index of the global work group
that the current compute shader invocation is executing within. The possible values range
across the parameters passed into <code class="varname">glDispatchCompute</code>, i.e., from (0, 0, 0) to
(<code class="varname">gl_NumWorkGroups.x</code> - 1, <code class="varname">gl_NumWorkGroups.y</code> - 1, <code class="varname">gl_NumWorkGroups.z</code> - 1).
</p>
</div>
<div class="refsect1" id="versions">
<h2>Version Support</h2>
<div class="informaltable">
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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_WorkGroupID</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>
</tr>
</tbody>
</table>
</div>
</div>
<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_LocalInvocationID.xhtml"><span class="citerefentry"><span class="refentrytitle">gl_LocalInvocationID</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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