gl_LocalInvocationID - contains the index of work item currently being operated on by a compute shader

       Copyright © 2012-2014 Khronos Group

[FIXME: source]                                    11/18/2024                           GL_LOCALINVOCATIONID(3G)

       in uvec3 gl_LocalInvocationID ;.SH "DESCRIPTION"

       In the compute language, gl_LocalInvocationID is 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).

       gl_LocalInvocationID - contains the index of work item currently being operated on by a compute shader

gl_NumWorkGroups(), gl_WorkGroupID(), gl_WorkGroupSize(), gl_GlobalInvocationID()

       ┌──────────────────────┬───────────────────────────────────────────────────────────────────────────────────┐
       │                      │        OpenGLShadingLanguageVersion                                            │
       ├──────────────────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┤
       │ Variable             │ 1.10 │ 1.20 │ 1.30 │ 1.40 │ 1.50 │ 3.30 │ 4.00 │ 4.10 │ 4.20 │ 4.30 │ 4.40 │ 4.50 │
       │ Name                 │      │      │      │      │      │      │      │      │      │      │      │      │
       ├──────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │ gl_LocalInvocationID │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │
       └──────────────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘