Note: gltfpack development is done in spare time; potential corporate sponsors should feel free to reach out via e-mail.

Library improvements

• New experimental function, meshopt_buildMeshletsSpatial, generates meshlets that are optimized for ray tracing workloads and can be used with NVidia cluster acceleration structure extensions
• New experimental function, meshopt_generateVertexRemapCustom, generates vertex remap for reindexing using a custom comparison function for vertex attributes, which can be used to weld vertices with per-attribute tolerance
• New experimental function, meshopt_simplifyPrune, removes connected components under the specified threshold, which is useful for simplification and isosurface cleanup
• New experimental function, meshopt_spatialClusterPoints, subdivides the input point cloud into uniformly sized chunks, which is useful for compute driven rendering
• New experimental function, meshopt_analyzeCoverage, returns rasterized coverage from three cardinal axes, which is useful for distance based culling
• meshopt_encodeVertexBufferLevel now accepts encoding version as an optional parameter for multi-threaded multi-versioned encoding
• meshopt_partitionClusters now accepts vertex positions as an optional input, which helps reduce spatial bounds for partitions
• meshopt_partitionClusters is now ~2x faster on typical inputs
• meshopt_spatialSort* functions now use more precise Morton codes, yielding more accurate order for large meshes
• meshopt_decodeIndexBuffer has been optimized to decode ~10% faster when using MSVC
• meshopt_computeMeshletBounds and other bounds functions now compute 1-2% tighter bounding spheres
• meshopt_analyzeOverdraw now correctly computes depth information which results in more accurate statistics
• meshopt_simplify now correctly handles negative zero components in input positions
• meshopt_generateProvokingIndexBuffer and meshopt_spatialSortTriangles are now stable
• CMake option MESHOPT_STABLE_EXPORTS allows building shared library without experimental functions
• Improve code compatibility with VS2013

gltfpack improvements

• Improve performance for inputs with abnormally large vertex accessors
• Lines are now supported in input .OBJ files

Thanks to @axmand and @pm4rtx for contributions to this release!