Arseny Kapoulkine 260287b3a1 Rewrite index optimization code for maximum efficiency ... While all the previous fixes to optimizeVertexCache invocation fixed the vertex transform efficiency, the import code still was missing two crucial recommendations from meshoptimizer documentation: - All meshes should be optimized for vertex cache (this reorders vertices for maximum fetch efficiency) - When LODs are used with a shared vertex buffer, the vertex order should be generated by doing a vertex fetch optimization on the concatenated index buffer from coarse to fine LODs; this maximizes fetch efficiency for coarse LODs The last point is especially crucial for Mali GPUs; unlike other GPUs where vertex order affects fetch efficiency but not shading, these GPUs have various shading quirks (depending on the GPU generation) that really require consecutive index ranges for each LOD, which requires the second optimization mentioned above. However all of these also help desktop GPUs and other mobile GPUs as well. Because this optimization is "global" in the sense that it affects all LODs and all vertex arrays in concert, I've taken this opportunity to isolate all optimization code in this function and pull it out of generate_lods and create_shadow_mesh; this doesn't change the vertex cache efficiency, but makes the code cleaner. Consequently, optimize_indices should be called after other functions like create_shadow_mesh / generate_lods. This required exposing meshopt_optimizeVertexFetchRemap; as a drive-by, meshopt_simplifySloppy was never used so it's not exposed anymore - this will simplify future meshopt upgrades if they end up changing the function's interface.		2024-11-04 06:58:06 -08:00
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config.py
register_types.cpp
register_types.h
SCsub