Animation Transitions are not interruptable

[Flavelius]

Godot version:

3.2.3.stable.mono.official

OS/device including version:

Win10

Issue description:

AnimationTrees allow for blending animations which is important for good looking motion. Sometimes longer transitions need to be used to allow a variety of animations to match up with each other well.
The problem is that transitions (the blending) cannot be interrupted and currently play until done, which makes certain animation types look wrong, for example falling to moving, where small height differences usually start the falling animation, but the immediate switch to grounded typically cancels it and resumes grounded animation. But currently the falling transition takes over and animates the character until the falling pose, even if the initial state is traveled to immediately again.

Edit: It looks like it's the same with manually calling the AnimationPlayer and blend duration as parameter.

See this video with exaggerated transition time:
https://streamable.com/a1vsjp

[TokageItLab]

@Flavelius If there are more than two state transitions, i.e. no return to the start state, are the transitions working correctly?

[Flavelius]

@TokageItLab Unfortunately it's the same:

[TokageItLab]

@Flavelius Is it mean you want to use the any Mode like PlayMode Immediately from script easily? I think this is probably a feature addition.

[Flavelius]

Sorry, i don't understand that question.
The problem here is, when animations are forced to complete their blending, they cannot be interrupted.
Imagine a transition from jumping to falling where the ground beneath the character is actually just a very small hole, so the character immediately is grounded again.
Currently with this bug, the character completes his falling animation transition forcibly until he plays the grounded animation again, which looks silly and wrong.
There's the possibility that i just misunderstand the 'Immediate' mode of transitions, and that this option is unrelated to 'actually immediately blending' and is just a way to not wait until the end of the animation clip length; in this case it should be renamed to 'After Blend' or something like that.
If that's the case then transitions definitely need an option to make them interruptable (like in unity), to be able to produce intended transition visuals.

When i click play on a state that has 'immediate' set, i expect it to begin transitioning to the target state 'immediately' and not that it's queued up.

[TokageItLab]

The immediate mode is to run the next Transition at the end of the Xfade of the previous Transition, and the AtEnd mode is to run the next Transition at the end of the animation. In other words, the problem is that it is not possible to abort a Transition and start a new Transition, which is a lack of functionality and not a bug.

[Flavelius]

Ok, i began expecting that this is the case. That's unfortunate. I'll create an improvement proposal

[TokageItLab]

Yes, I agree with the implementation of that feature. I'll keep this in mind as I'm one of the contributors trying to improve the animation feature.

[Flavelius]

godotengine/godot-proposals#2200