WebGPURenderer: WGSL Fix calculation of instanceIndex in compute shaders #28865
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Related issue: #28846
Description
The current implementation of
instanceIndexonly usesglobal_invocation_id.x, which doesn't work with the new Y and Z dimensions. This PR addresses the issue by updating the WGSL behavior ofdispatchWorkgroupsin the WebGPU backend. This ensures correct functionality when the number of particles exceedsmaxComputeWorkgroupsPerDimension.This contribution is funded by Utsubo