AnimationClip uuid on undefined, but it is defined!

[mwmwmw]

I'm trying to get an AnimationAction from an AnimationClip.

For some reason, the importer leaves the action empty, but I have the clips object and it does contain a reference.

But, if I try to create an animation with mixer.clipAction(clips[0]) it tells me that uuid can't be found on undefined.

I can clearly see that the clip is there and has a UUID and clipAction isn't called until after clips[0] is available.

Maybe my brain isn't working today, but I don't see what I'm doing wrong here.

The fun starts on line 31.

https://codesandbox.io/s/why-clippy-no-play-ksnvn9?file=/src/index.js

[drcmda]

im not sure if this is correct. useAnimation is an abstraction to cast clips into actions, it needs a root (2nd arg) or else the clips aren't valid, see: https://github.com/pmndrs/drei#useanimations

  const { scene, animations } = useGLTF("/psyko.glb")
  const { actions } = useAnimations(animations, scene)

  useEffect(() => {
    //if (clips[0]) {
      //console.log(actions)
      actions["Armature|Armature|Psyko_Armature|Armature|Psyko_Armature"].play()
      //actions["dance"] = mixer.clipAction(clips[0])
      //actions["dance"].play()
    //}
  }, [actions])

the file only contains one clip named "Armature|Armature|Psyko_Armature|Armature|Psyko_Armature" and it plays. it looks to me you want to make your own actions, at least i'm guessing that's why you call clipAction (?) which isn't needed with useAnimations. in that case i'd much rather create a plain THREE.Mixer and go without abstractions, everything's under your control.

[mwmwmw]

Ah yes, I see now.

Not passing scene into useAnimations results in actions["Armature|Armature|Psyko_Armature|Armature|Psyko_Armature"] being undefined.

I then tried to fix that in the most convoluted way possible.