8f6a52a460
The software rayQuery shim's _rqTraverseTlas detected BVH leaves with a compile-time constant TLAS_BVH_LEAVES_START = 16384 - 1, while the actual TLAS sweep tree is built at depth log2(next_pow2(instanceCount)). For any scene with fewer than 8193 instances the padded leaf count is far below 16384, so no node index ever reached 16383: every node looked internal, the descent walked into zeroed out-of-tree AABBs, and the pick reported a permanent miss. This broke every rayQuery=true compute shader (builder picking, splash queries) on the WebGPU backend. Pass the per-build padded leaf count to the shim the same way the megakernel _rtwTraverseTlas reads wfParams.tlasNPadded: a small uniform (RqTlasMeta.nPadded) at @group(1) @binding(10), written each wgpuBuildTLAS from wfNextPow2(instanceCount), and bound by both rayQuery dispatch paths. _rqTraverseTlas now computes leavesStart = nPadded - 1 dynamically. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> |
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| dom-env.js | ||
| dom-webgpu.js | ||