Find all Animator transitions

Unity Engine
1

I’m creating a 2d game and the animation transitions 's exit time and transition durations are set to numbers which I don’t want i.e not 1 for exit time and 0 for transition duration.

How to find and set all the transitions’ settings (animation duration/ exit time) of a given animator programmatically?

2

Ok I found a decent way

var stateMachine = _animatorController.layers[0].stateMachine;
            var states = stateMachine.states;

            List<AnimatorStateTransition> allTransitions = new List<AnimatorStateTransition>();
            foreach (var state in states)
            {
                allTransitions.AddRange(state.state.transitions);
            }

            foreach (var transition in allTransitions)
            {
                transition.duration = 0;
                transition.exitTime = 1;
            }

The _animatorController is something I feed to my Editor Window with:
_animatorController = (AnimatorController)EditorGUILayout.ObjectField(_animatorController,
typeof(AnimatorController), true);

I don’t know how to do this automatically every time a new transition is created, probably through events but I’m not familiar with that kind of stuff, so right now what I do is simply clean the specific Animator Controller.
You could also get every Animation Controller in the project to do on every Animation Controller.

3

thanks. what class are these “var’s”?
a bit unreadable
_animatorController is it a “RuntimeAnimatorController”?
or an “Animator”?
Or something entirely else?

Animator and RuntimeAnimatorController dont have a “layers” array.

4

_animatorController is AnimatorController (class).

5

I know this is an old thread, but it was one of the first Google hits that I got. So, for anyone like @OC_Raiz that’s interested, this is my code. Hope it helps.

var controller = animator.runtimeAnimatorController;
            var stateMachine = ((AnimatorController)controller).layers[layerIndex].stateMachine;
            var states = stateMachine.states;

            List<AnimatorStateTransition> allTransitions = new List<AnimatorStateTransition>();
            foreach (var state in states)
            {
                allTransitions.AddRange(state.state.transitions);
            }

            foreach (var transition in allTransitions)
            {
                transition.duration = 0;
                transition.exitTime = 1;
           }
3 Likes
6

I have build this utility MonoBehaviour that automatically modifies all transitions in OnValidate

[RequireComponent(typeof(Animator))]
public class StateAnimator : MonoBehaviour
{
    private Animator _animator;

#if UNITY_EDITOR // put using UnityEditor statement in precompiler flags as well
    private void OnValidate()
    {
        _animator = GetComponent<Animator>();
        var animatorController = _animator.runtimeAnimatorController as AnimatorController;
        if (animatorController == null) return;
        foreach (AnimatorStateTransition transition in animatorController.layers
            .SelectMany(layer => layer.stateMachine.states.SelectMany(state => state.state.transitions)))
        {
            transition.duration = 0f;
            transition.hasExitTime = false;
        }
    }
#endif
}
2 Likes
7

Wait… all of these solutions that use the AnimatorController class wouldn’t work in build, though… since they are using an extension of the UnityEditor class. Right?

8

That’s right, but they don’t have to. OnValidate is only called in the editor, anyway. You’ll have to make sure to wrap the code in #if UNITY_EDITOR precompiler flags, though, for the build to work. I’ll edit the above snippet accordingly.

9

I created my own AnimatorUtil based on your codes. Thanks.

using System;
using System.Collections.Generic;
using UnityEditor.Animations;
using UnityEngine;

[Serializable]
public class TransitionSettingOverride
{
    public string name; // 状态机的名字

    public bool hasExitTime;
    public bool hasFixedDuration;
    public float duration; // percent
    public float exitTime; // percent
}

[ExecuteInEditMode]
public class AnimatorUtil : MonoBehaviour
{
    public AnimatorController anim;

    public bool hasExitTime;
    public bool hasFixedDuration;
    public float duration; // percent / in seconds if hasFixedDuration is true
    public float exitTime; // always in percent

    public List<TransitionSettingOverride> overrides;

    private void OnDisable()
    {
        var stateMachine = anim.layers[0].stateMachine;

        DfsAnimatorStateMachine(stateMachine);

        Debug.Log("<color=red>Animator Updated</color>");
    }

    void DfsAnimatorStateMachine(AnimatorStateMachine stateMachine)
    {
        var states = stateMachine.states;

        List<AnimatorStateTransition> allTransitions = new List<AnimatorStateTransition>();
        foreach (var state in states)
        {
            allTransitions.AddRange(state.state.transitions);
        }

       
        TransitionSettingOverride setting = null;
        foreach (var item in overrides)
        {
            if (stateMachine.name == item.name)
            {
                setting = item;
            }
        }

        if(setting != null)
        {
            foreach (var transition in allTransitions)
            {
                transition.hasExitTime = setting.hasExitTime;
                transition.hasFixedDuration = setting.hasFixedDuration;
                transition.duration = setting.duration;
                transition.exitTime = setting.exitTime;
            }
        }
        else
        {
            foreach (var transition in allTransitions)
            {
                transition.hasExitTime = hasExitTime;
                transition.hasFixedDuration = hasFixedDuration;
                transition.duration = duration;
                transition.exitTime = exitTime;
            }
        }
       
        Debug.Log($"Reset {allTransitions.Count} transitions in {stateMachine.name}");

        foreach (var t in stateMachine.stateMachines)
        {
            DfsAnimatorStateMachine(t.stateMachine);
        }
    }
}