Support for KHR_mesh_quantization and EXT_meshopt_compression

[goldenratio]

Hi,
I am trying to optimize meshes in .glb files using gltfpack,
gltfpack -i Soldier.glb -o Soldier-opt.glb -c

Pixi3D doesn't seem to render optimized 3d file. Further googling noticed three.js and playcanvas handles KHR_mesh_quantization and EXT_meshopt_compression

Minimal reproducible repo is here, https://github.com/goldenratio/pixi3d-poc-72
Any help is appreciated.
attaching models

[jnsmalm]

Would be nice to support these, but seems like a lot of work to make it happen. I don't feel like digging into this right now, if anyone else does let me know :-)

[goldenratio]

Attaching some additional minimal models
AnimatedMorphCube.zip

AnimatedMorphCube.glb (plain) - works well with Pixi3D
AnimatedMorphCube-meshquant.glb (KHR_mesh_quantization) - renders, but geometry is bit off
AnimatedMorphCube-meshopt.glb (EXT_meshopt_compression) - doesn't render. It needs client-side decoder. It's not a priority.

I will try dig into KHR_mesh_quantization. I suspect something to do with byteStride in gltf-parser

[MatsErdkamp]

Quickly tried to implement meshopt compression by using https://www.npmjs.com/package/meshoptimizer. Got it working for a few meshes, but some were fully bugged out. Will try do add it properly soon.