Contains the local linear index of work item currently being operated on by a compute shader.
In the compute language,gl_LocalInvocationIndexis a derived input variable containing the 1-dimensional linearized index of the work invocation within the work group that the current shader is executing on. The value ofgl_LocalInvocationIndexis equal togl_LocalInvocationID.z*gl_WorkGroupSize.x*gl_WorkGroupSize.y+gl_LocalInvocationID.y*gl_WorkGroupSize.x+gl_LocalInvocationID.x.
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