google / google/bigwheels

[glTF] Support meshes with non-triangle primitive modes

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enhancement
Dominant language
C++
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Description

`GltfLoader::LoadMeshData` only loads meshes that use the triangle primitive mode. However, [5.24.4](https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#_mesh_primitive_mode) defines other support primitives like lines, points, triangle strips, and triangle fans.

This would allow BigWheels to load and render:

- [MeshPrimitiveModes](https://github.com/KhronosGroup/glTF-Sample-Assets/tree/main/Models/MeshPrimitiveModes)

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