mirror of
https://github.com/blender/blender
synced 2026-09-29 04:37:17 +03:00
048d17e6dd
This PR begins to replace the use of Blender's "BLI_kdopbvh" BVH tree for meshes with Embree. Embree is a much newer implementation and and has much better performance characteristics. In particular, building the BVH is over 5 times faster. Raycasting against the BVH and closest point sampling is faster as well. With the extensive usage of the old BVH API across Blender, it's unrealistic to do a complete replacement in a single PR. This change focuses on the triangle surface BVH, in cases where the replacement is relatively obvious. The idea is that enough uses are covered so that in most use cases only the Embree BVH will be needed. Because Embree is an optional dependency, there also needs to be a fallback to use the old API. If we ever wanted to remove the old BVH implementation we could discuss making it a mandatory dependency. Test results are different in a few cases because Embree chooses a different triangle for the arbitrary choice of closest triangle on either side of an edge. I also had to increase the threshold for the hair dynamics test, where small differences in any intermediate values are chaotically amplified. Next steps are described in #161529. This was investigated before in !108148. Pull Request: https://projects.blender.org/blender/blender/pulls/156408 |
||
|---|---|---|
| .. | ||
| external_libs.cmake | ||
| macros.cmake | ||
| msvc_arch_flags.c | ||
| zstd_compress.cpp | ||