Request for bone length to be exported

Bones have a concept of length in Blender, which currently is not exported. This is useful, particularly when trying to load another object in-game at a location relative to the end of a bone. You can parent an object to a bone in Blender, and it is rendered in Blender relative to the end of the bone. But there is no way to get it in the correct place after it has been exported without the offset along the length of the bone.

To get the data I needed in-engine I simply added the following to gltf2_generate.py at line 1913 in generate_nodes()

node['length'] = blender_bone.length

[donmccurdy]

One thing we could do, though, would be to add “leaf” bones — just another node at the end of the last bone in the chain. The FBX exporter has an option for this, and it allows you to attach things there for instance. Marking as an enhancement, would be good to hear if there are other use cases…

[setpixel]

Yes - this is a pretty important thing to visualize the bones. For now I’m just adding a bone to the end of every dangling bone. +1 for leaf bones