Bone rotation doesn't work

Hey guys!

I’m currently working on some project, where I want to manually control certain bones.

Now, I’ve encountered an issue, where I can’t control the bone rotation. With neither the bone.rotate(), nor bone.rotation = …

Seems as if the rotation gets reset before each tick.

Works fine if I control the bone mesh though.

Am I doing something wrong there, or is this a bug?


It doesn’t work because there is a transform driving that bone.
You can either:

  • modify its tranform : properllerBone.getTransformNode().rotate(BABYLON.Axis.Y, .1);
  • or remove it’s transform then drive the bone yourself:
    properllerBone.linkTransformNode(null); properllerBone.rotate(BABYLON.Axis.Y, .1);
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Ah, ok, thanks! I thought that by default the bone always drives the transform node, not vice-versa!

It depends on where the mesh comes from: if coming from gltf/glb, it is the transform node that drives the transformation, else it is the transform matrices of the bone itself.


Thank you for this valuable information

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