Does several materials in one cluster supported?

[KickRooster]

Hi there,

I'm using meshoptimizer helping me to support Nanite like continuous LOD rendering. As far as I know, meshoptimizer doesn't support more than one material existing in one cluster after function
void nanite(const std::vector<Vertex>& vertices, const std::vector<unsigned int>& indices)
be called now, is it?

Thanks.

[zeux]

clusterlod.h does not have explicit multi-material support. https://meshoptimizer.org/#advanced-simplification covers some ways to resolve this which probably would work here too: splitting the mesh along the material boundary could work (but will have some challenges along the boundary in the simplified result...); pre-processing the input mesh so that vertices have material ids would allow to run the entire cluster LOD generation pipeline and then extract the resulting material from the vertices referenced by the triangles.

[KickRooster]

Yep, thank you for sharing the idea of splitting the mesh by material id as a vertex attribute. I'll try it and hope it works well for group hierarchy generation.