A 3x3x3 grid of AABB-geometry spheres rendered through an analytic
ray-sphere intersection shader, with an any-hit spherical-checkerboard
cut-out so the background shows through. Exercises both features end to
end on the WebGPU wavefront tracer.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
The TRACE-stage BLAS descent now threads the payload through, runs the
any-hit shader for non-opaque candidates (DXR/VK opacity resolution:
ray FORCE flags > instance FORCE flags > geometry opaque bit), and
handles AABB leaves via the intersection shader. MeshRecord grows to 64
bytes with geomType + opaque. When any-hit/intersection are present the
TRACE pipeline takes the user bind-group layout so those shaders can
sample @group(3+) resources; otherwise TRACE keeps its zero-user-code
path unchanged. rayQuery stays triangle-only (skips AABB leaves).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
PipelineRTWebGPU emits a runIntersection mega-switch and the
RT_HAS_ANYHIT / RT_HAS_INTERSECTION consts (+ the @CRAFTER_RT_TRACE_USER
marker) that gate the library's new TRACE-stage user callbacks, so an
opaque triangle-only scene still const-folds them away. Mesh-WebGPU
builds a SAH BVH2 over AABB primitives and uploads them in primitive
order for the intersection shader to fetch.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Extends the cross-backend RT type surface for procedural geometry +
any-hit on the WebGPU path:
- RTShaderGroupType::ProceduralHitGroup + RTShaderGroup::intersectionShader
(mirror VK_RAY_TRACING_SHADER_GROUP_TYPE_PROCEDURAL_HIT_GROUP_KHR).
- WebGPURTStage::Intersection for AABB intersection shaders.
- Mesh::BuildProcedural(span<RTAabb>, opaque) — the WebGPU analog of a
VK_GEOMETRY_TYPE_AABBS_KHR geometry.
- wgpuRegisterMeshBLAS gains geomType / opaqueFlag / primCount.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
