Remaining issues with the gltf loader

[jakobhellermann]

I've tried all the gltf samples models from here and while many already load, here's the list of remaining issues:

TODO:

• ~Animations~
• Coating (ClearCoatTest)
• Environment (EnvironmentTest)
• Morph primitives (MorphPrimitivesTest)
• Multiple UVs (MultiUVTest)
• Material Variants (SheenChair, SheenCloth)
• Transmission (TransmissionTest)
• ~Two Sided (TwoSidedPlane)~
• Texture Transform (TextureTransformMultiTest, TextureTransformTest)
• Loading lights
• KHR_draco_mesh_compression
• glTF-Quantized
• ~"Embedded" gltf variants (inline data URIs)~
• ~Cameras~
• ~Vertex colors (VertexColorTest)~
• ~data URIs in images~
• ~Missing Vertex_Normal~
• ~Missing UV~

Bugs:

• ~glTF-Sample-Models/2.0/SheenCloth/glTF/SheenCloth.gltf (range end index 263168 out of range for slice of length 262144)~
• glTF-Sample-Models/2.0/SimpleSparseAccessor/glTF/SimpleSparseAccessor.gltf (subtract with overflow)
• ~glTF-Sample-Models/2.0/Box With Spaces/glTF/Box With Spaces.gltf (failed to load path)~

[julhe]

I've adressed vertex colors in https://github.com/bevyengine/bevy/pull/1775

[lassade]

@jakobhellermann I was doing a similar work here, can you post the link for your test repo?

[wotori]

For now we can't play gltf animations right? Only import?

[kirusfg]

@wotori I think you are referring to #3751, which has not been merged yet. This PR includes an example of playing simple animations; stuff like skeletal animation would only make sense to implement after #4026 is completed (see bevy_prototype_animation)

[rlidwka]

Loading lights

I believe this is fixed (see https://github.com/bevyengine/bevy/issues/1331). And I can confirm that lights work (after checking "Punctual lights" in blender export settings for glTF).

Can this item be crossed off the list? Or are there other light options that aren't supported?

[janhohenheim]

"Texture Transform (TextureTransformMultiTest, TextureTransformTest)" was probably resolved by https://github.com/bevyengine/bevy/issues/11869