v148 · WebGPU · WGSL

Workgroup Index Demo

Visualize how @builtin(workgroup_index) (the new linear_indexing built-in) assigns a unique flat index to each workgroup in a 3D dispatch grid. Click any workgroup cell to see its 3D coordinates, its workgroup_index, and the WGSL that computes it — both old boilerplate and the new built-in.

Dispatch configuration

Workgroups X

Workgroups Y

Workgroups Z

Workgroup grid (Z slice selector → click a cell):

Z =

Selected

Even index

Odd index

WGSL for selected workgroup:

Click a workgroup cell.

Click a cell in the grid to see its coordinates and workgroup_index.

implementation reference

Need the exact API surface, compatibility boundaries, errors, lifecycle, and source links? Read the matching gendn reference ↗