How to delete a StateMachineBehaviour via Editor Script?

Questions & Answers
1

Hi there, I’m building tools to automate creation of complex Animators and would like to be able to remove StateMachineBehaviours on states via script.

I expected that since there is a AddStateMachineBehaviour, there would be a RemoveStateMachineBehaviour, but this does not exist!

Next I tried to get all of the Behaviours on the Animator and call DestroyImmediate on them individually. GetBehaviours works, but DestroyImmediate doesn’t appear to do anything.

CustomStateBehaviour[] customStateBehaviour = myAnimator.GetBehaviours< CustomStateBehaviour>();
for (int s = 0; s < customStateBehaviour.Length; s++){
    DestroyImmediate(customStateBehaviour~~);~~

}
I also tried putting a Destroy function inside the state machine behaviour and calling that instead of DestroyImmediate.
public void DestroySelf(){
DestroyImmediate(this);
}
This doesn’t work either. So how exactly can I destroy many StateMachineBehaviours in an Animator controller via Editor code?

2

Figured it out! Needed to get states in a different way, and to set allowDestroyingAssets to true on DestroyImmediate.

// get animator controller from animator
UnityEditor.Animations.AnimatorController ac = (UnityEditor.Animations.AnimatorController)myAnimator.runtimeAnimatorController;
UnityEditor.Animations.AnimatorStateMachine sm = ac.layers[0].stateMachine;
// iterate through states inside controller
for (int i = 0; i < sm.states.Length; i++) {
    // pull the state out
    UnityEditor.Animations.ChildAnimatorState childAnimState = sm.states*;*

// iterate through them
foreach (StateMachineBehaviour stateMachBehs in childAnimState.state.behaviours){
// compare the type with the type we want to destroy
if (stateMachBehs is DestroyThisTypeOfStateBehaviour){
DestroyImmediate(stateMachBehs, true);
}
}
}
// needed to see results
AssetDatabase.Refresh();