## Name

gl_WorkGroupID — contains the index of the workgroup currently being operated on by a compute shader

## Declaration

`in uvec3 gl_WorkGroupID ;`

## Description

In the compute language, `gl_WorkGroupID` 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 `glDispatchCompute`, i.e., from (0, 0, 0) to (`gl_NumWorkGroups.x` - 1, `gl_NumWorkGroups.y` - 1, `gl_NumWorkGroups.z` - 1).

## Version Support

| OpenGL Shading Language Version
--- | ---
Variable Name | 1.10 | 1.20 | 1.30 | 1.40 | 1.50 | 3.30 | 4.00 | 4.10 | 4.20 | 4.30 | 4.40 | 4.50
gl_WorkGroupID | - | - | - | - | - | - | - | - | - | ✔ | ✔ | ✔

## See Also

gl_NumWorkGroups, gl_WorkGroupID, gl_LocalInvocationID

## Copyright

Copyright © 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. http://opencontent.org/openpub/.