Konstantin Seurer
9be00573c4
VkAccelerationStructureBuildRangeInfoKHR spec:
If the geometry uses indices, primitiveCount × 3 indices are consumed from VkAccelerationStructureGeometryTrianglesDataKHR::indexData, starting at an offset of primitiveOffset. The value of firstVertex is added to the index values before fetching vertices.
If the geometry does not use indices, primitiveCount × 3 vertices are consumed from VkAccelerationStructureGeometryTrianglesDataKHR::vertexData, starting at an offset of primitiveOffset + VkAccelerationStructureGeometryTrianglesDataKHR::vertexStride × firstVertex.
Meaning: We always add firstVertex * vertexStride
to the vertex address and add primitiveOffset
either to the vertex address or the index address,
depending on wether indices are used.
Also add missing handling with instances.
Fixes: 0dad88b ("radv: Implement device-side BVH building.")
Signed-off-by: Konstantin Seurer <konstantin.seurer@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16719>
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