cloth_vertices

Cloth vertex-write pass for the cloth module's GPU simulation. Reads one cloth's simulated particle grid and writes the mesh's GPU vertex buffer in the engine Vertex layout (23 u32 per vertex): particle positions, smooth normals from central differences, grid UVs, and a procedural per-vertex fabric pattern colour (solid / bands / checker / gradient / border). Dispatched once per cloth per frame with that cloth's own vertex buffer bound positionally.