Is reverse playback in model animations supported?

[ninjz]

I was going to go for the [email protected] library but saw that reverse playback is not supported on model animations. Is this still a limitation in this library?

Sort of a deal breaker for me, but I'd be open to any suggestions of alternative lightweight libs which support this. Thanks!

[ThomasGorisse]

What do you mean by revrse playback exactly? Reading the animation from end to begin?

[ninjz]

Yes exactly, playing the animation from end to beginning. Usually that would mean say setting the speed value to -1. The documentation from Sceneform 1.15.0 says specifically:

"Reverse playback is not supported in model animations"

reference from docs

I do this fine on iOS using SceneKit, but see that this isn't supported here. My animations need to play in reverse and I don't want to need to have a separate animation just to play it in reverse which would bloat the application size.

[ThomasGorisse]

Model Animations on Sceneview/Sceneform are standard Android ObjectAnimator which are basely mapped to your animations frames.
You can do everything you do with the ObjectAnimator

val animation = modelNode.renderableInstance.animate(repeat)
animation.reverse()

Edit: animation.start()

See https://github.com/SceneView/sceneform-android#animations

[ninjz]

Sorry for the delay @ThomasGorisse . I just gave this a try and .reverse() seems to have no effect and the animation still plays in the same direction.

Any other ideas?

[ninjz]

After diving a bit deeper into the ValueAnimator code, it works by just calling .reverse() as the call starts playing the animation in reverse and .start() does not need to be called after as it will result in playing the animation in the forward direction again. Thanks for your help @ThomasGorisse

val animation = modelNode.renderableInstance.animate(repeat)
animation.reverse()