forked from 1b-agent/opencadstudio-upstream
Hakan SevenandClaude Opus 4.8
0317dad14e
Every wire segment is one instance, and each carried the wire's color, line-weight, dash pattern and draw-depth (~44 B) inline — re-fetched per segment even though they're constant along the wire. On native, move those into a per-wire `WireConst` storage buffer (group 1) indexed by a `wire_id` on the instance. The instance drops from 104 B to 60 B (~42 %) across every entity's wires, and the shared constants are fetched once per wire (cached) instead of once per segment — less vertex-attribute bandwidth and less GPU upload on rebuilds. WebGL2 has no vertex-stage storage buffers, so the wasm build keeps the original self-contained fat instance and wire.wgsl; native uses the new slim instance, wire_indexed.wgsl, and a group-1 bind group built per batch in WireGpu::from_run / from_batch. Visual output is unchanged (colors are now full f32 rather than 8-bit, if anything more precise). Co-Authored-By: Claude Opus 4.8 <[email protected]>