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Changelog

0.2.0

Breaking changes

  • The single-BVH API (BVH, TriangleMesh, AccelPrimitive) is replaced by a two-level acceleration-structure API: BLAS / TLAS (and the BVH4 variants BLAS4 / TLAS4). Build with build_blas / build_tlas / build_blas4. Multiple meshes/instances now live under one TLAS rather than being merged into a single BVH.
  • The RayIntersectionSession API (hit_points, hit_distances, hit_count, miss_count) is removed. Use trace_rays / closest_hit / any_hit against a TLAS directly; the result types are RTHitResult and RTRay.
  • Primitives now carry a generic meta::T field instead of separate material/primitive indices (this was prepared in 0.1.x via PR #9 and is now the only supported shape).

Upgrading

  • Replace BVH(meshes...) with build_blas(...) per geometry plus build_tlas(blases, instances). For dynamic scenes use TLASHandle + update! + sync!.
  • Replace RayIntersectionSession workflows with trace_rays(tlas, rays) returning Vector{RTHitResult}, or call closest_hit(tlas, ray) / any_hit(tlas, ray) for single-ray queries.
  • For heterogeneous geometry sets, see the new MultiTypeSet / StaticMultiTypeSet API (with_index, deref, store_texture).

New features

  • Two-level acceleration structures (TLAS / BLAS) with instance transforms, dynamic update! / sync!, GPU-side instance_buffer, and lifecycle helpers (n_instances, n_total_instances, n_geometries, wait_for_gpu!, free!).
  • BVH4 (4-wide) acceleration: BVHNode4, BLAS4, TLAS4, build_blas4, closest_hit4, any_hit4.
  • MultiTypeSet / StaticMultiTypeSet for heterogeneous, type-stable collections; companion SetKey / TextureRef indexing types and store_texture, maybe_convert_field mutators.
  • Collision queries: collide_instances, collide_instances_any, ContactPair, CollisionResult.
  • Struct-of-arrays helpers: @get, @set, similar_soa, plus the unrolled-iteration utilities for_unrolled, map_unrolled, reduce_unrolled, sum_unrolled, getindex_unrolled, and FastClosure.
  • Abstract accel hierarchy (AbstractAccel, AbstractAdaptedAccel) to host both software-BVH and hardware-RT (e.g. Vulkan) backends.