%mathent; ]> 2011-2014 Khronos Group gl_GlobalInvocationID 3G gl_GlobalInvocationID contains the global index of work item currently being operated on by a compute shader Declaration in uvec3 gl_GlobalInvocationID Description In the compute language, gl_GlobalInvocationID is a derived input variable containing the n-dimensional index of the work invocation within the global work group that the current shader is executing on. The value of gl_GlobalInvocationID is equal to gl_WorkGroupID * gl_WorkGroupSize + gl_LocalInvocationID. Version Support gl_GlobalInvocationID See Also gl_NumWorkGroups, gl_WorkGroupID, gl_WorkGroupSize, 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/.