Contains the index of work item currently being operated on by a compute shader.
In the compute language,gl_LocalInvocationIDis 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 (gl_WorkGroupSize.x- 1,gl_WorkGroupSize.y- 1,gl_WorkGroupSize.z- 1).
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