Only Exporting keyframes set for certain objects/channel

[shrekshao]

Hi Kupoman

It seems to me that currently the exporter export the animation of the whole thing, including those objects that don't have key-frames set for the current track. It uses the current pose shown in the blender view for those objects without key-frames set. Can you confirm this?

A feature(or option) I want is that for each track (action in the action editor), export only the objects/channels that actually has key-frames set. An example of glTF with this kind of animation layout is BrainStem, where each track only animate a subset of the objects (The unmerged history version is here: https://github.com/KhronosGroup/glTF-Sample-Models/blob/79891f1bf08b8ddee531a8d82926d5f24d390e51/2.0/BrainStem/glTF-Binary/BrainStem.glb). You can load this with https://gltf-viewer.donmccurdy.com/. As you see each animation corresponds to the movement of a part of the body.

With this, we can blend these animations at run time.

Thanks, Shuai

[Kupoman]

Empty channels have been excluded from exporting since f21506f35941ead900e1e17f05def543386f23a5. If you have an example where this is not working, could you please share a .blend file.

[shrekshao]

saber-animations-clarinet-model-attach-animation.zip

For example, the Clarinet-Body-Swing animation doesn't contain keyframe on fingers. But seems like in the exported gltf, there are still channels for finger joints.

No sure if this feature is easy to support.

[Kupoman]

When I export the model using the head of master, I only see one channel for the Clarinet-Body-Swing animation. I do not see any channels for fingers in that animation.

[shrekshao]

Hmm am I using an older version? I remember I delete these channels manually in the gltf json file. Let me retest it and I will close this if anything works fine. Thank you!

[Kupoman]

@shrekshao, have you had a chance to retest this yet?

[shrekshao]

Sorry for the late reply. Using 1.2.0, you are right. It is only exporting certain channels. My bad....