gl_LocalInvocationIndex - contains the local linear index of work item currently being operated on by a

       Copyright © 2012-2014 Khronos Group

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

       in uint gl_LocalInvocationIndex ;.SH "DESCRIPTION"

       In the compute language, gl_LocalInvocationIndex is 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 of gl_LocalInvocationIndex is equal to gl_LocalInvocationID.z * gl_WorkGroupSize.x *
       gl_WorkGroupSize.y + gl_LocalInvocationID.y * gl_WorkGroupSize.x + gl_LocalInvocationID.x.

       gl_LocalInvocationIndex - contains the local linear index of work item currently being operated on by a
       compute shader

gl_NumWorkGroups(), gl_WorkGroupID(), gl_WorkGroupSize(), gl_LocalInvocationID()

       ┌─────────────────────────┬───────────────────────────────────────────────────────────────────────────────────┐
       │                         │        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_LocalInvocationIndex │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │
       └─────────────────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘