When drawing the dots for the bones' position (translated for each animation) the bones' positions seem to be in the right places. This leads me to believe there is no problem with the translation but the problem might be more in the bone weights or rotation values... Or how they are applied in the end.

PS: There are some static bones in the GIF - they are just IK and are useful in blender. They should have no weight over the model.

I strongly suspect that the issue is related to the skin inverseBoneMatrix not being taken into account on the GLTF model.

More info about the skinning of the mesh: https://github.com/KhronosGroup/glTF-Tutorials/blob/master/gltfTutorial/gltfTutorial_020_Skins.md

What we need to achieve is to still process animation on all nodes (no matter that not all of them are considered bones - in raylib they are all translated to bones because bones have the Transformation fields related to them). But also check which nodes are part of a skin and take into account that skin's array of inverseBoneMatrix.

Because it is a matrix though we would need a matrix decomposition function so that we can apply its transformations to the bone transformations. I've opened an issue for that: #1850

@object71 Any news on this issue?

Nothing new that I found out. I just don't have the time to work on it.

Note: The LoadModelAnimations function needs an extra check if the file exists to not segfault. Or at least a controlled exception that shuts down the program.

Because it is a matrix though we would need a matrix decomposition function so that we can apply its transformations to the bone transformations.

Maybe this is a silly question, as I just started looking at the animation code, but why do we need a Transform type at all for bones? Could we just use Matrix for bindPose and framePoses?

I'm closing this issue because glTF animation system has been removed for now. It will be redesigned in the future.

I'm closing this issue because glTF animation system has been removed for now. It will be redesigned in the future.

@raysan5, out of curiosity, why was glTF anim support removed?

@redthing1 I removed it because it was not working properly, it requires a complete rework.