When multiple AnimationTrees are active in the same scene only the last AnimationTree result is applied

[KnightNine]

Godot version

4.1

System information

Windows 10

Issue description

Just noticed that I can no longer use the same AnimationPlayer across multiple AnimationTrees like I could in 3.X and I thought it was worth mentioning.

Here is a test scene, one AnimationTree handles the colorrect changing color, the other handles the colorrect changing the color's alpha value. note how the next animTree to become active overrides the cycle being run by the last animTree.

I've found that priority of which animation tree is allowed to work is based on the order of the nodes in the scene tree (last having a higher priority).

I can fix this by having an animation player for each animation tree though I didn't need to do this in 3.X.

Steps to reproduce

Set the anim_player property of two AnimationTrees (using AnimationNodeStateMachine as their tree_root property ) to the same AnimationPlayer and try to run them both at the same time.

What is being animated doesn't seem to matter.

Minimal reproduction project

Test.zip

[TokageItLab]

Probably this is the expected behavior, but I guess you could propose an option like AnimationTree.priority for when another AnimationTree is already manipulating the same object.

[TokageItLab]

If you want to apply both results of the two Trees, then this issue is exact a duplicate of #80971.

[KnightNine]

If you want to apply both results of the two Trees, then this issue is exact a duplicate of #80971.

Yeah, just realized that this issue is probably directly caused by #80971 since both animation trees are using the same anim-player and once the second anim-tree tries to run an animation, the unused parameters (across the anim-player being used) of the animation run within the second anim-tree are forced to be reset and this overrides the first anim-tree trying to animate anything.

This is hard to explain concisely.