Assignment to ChildAnimatorState.position has no effect

Questions & Answers
1

Hi there!

I have a very simple script that is supposed to change the positions of the state nodes in my Animator graph, for example the “New Animation” state in this graph:
109674-unityanimatorproblem.png

I can access the state position as shown in the “GenerateAnimatorGraph” function in the code below. But although the position property is a get/set, I cannot alter the position value → the Debug.Log gives me an unaltered position:

109675-unityanimatorproblem2.png

Is this a bug or how is this supposed to work?

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

using UnityEditor;
using UnityEditor.Animations;

{ 

    [ExecuteInEditMode]
    public class AnimationManager : MonoBehaviour {

        public AnimatorController animatorController;
	
	    // Update is called once per frame
	    void Update () {
		
            if(animatorController == null)
            {
                return;
            }
           
            GenerateAnimatorGraph();

	    }


        void GenerateAnimatorGraph()
        {
            // Attempt to change the states position
            animatorController.layers[0].stateMachine.states[0].position = new Vector3(120, 240, 0);

            // Get state position -> is unaltered!!!
            Debug.Log(animatorController.layers[0].stateMachine.states[0].position.ToString());
        }


    }
}
3

//ChildAnimatorState is ValueType, set position like this

var animator = Selection.activeObject as AnimatorController;
if (animator != null)
{
	var baseLayer = animator.layers[0];
	baseLayer.stateMachine.entryPosition = new Vector3(132, 324);
	baseLayer.stateMachine.anyStatePosition = new Vector3(-60, 24);
	var childStates = baseLayer.stateMachine.states;
	for (var i = 0; i < childStates.Length; i++)
	{
		var childState = childStates*;*

  •  Debug.Log(childState.state.name);*

  •  childState.position = new Vector3(123,321,0);*

_ childStates = childState;_
* }*
* baseLayer.stateMachine.states = childStates;*
* EditorUtility.SetDirty(animator);*
}
AssetDatabase.Refresh();

2

Seems like a bug to me. You can set the position of a ChildAnimatorState if you do it during initialization like so: var state = StateMachine.AddState("state1", new Vector3(400, 100, 0));

4

Try this…

UnityEngine.Object[] selectedAsset = Selection.GetFiltered(typeof(UnityEngine.Object), SelectionMode.DeepAssets);
        foreach (UnityEngine.Object obj in selectedAsset)
        {
            if (obj.GetType() != typeof(AnimatorController))
            {
                continue;
            }

            AnimatorController controller = obj as AnimatorController;
            AnimatorControllerLayer controllerLayer = controller.layers[0];
            AnimatorStateMachine stateMachine = controllerLayer.stateMachine;

            // 1. Create an array in order to hold all childStates.
            ChildAnimatorState[] childStates = new ChildAnimatorState[stateMachine.states.Length];
            for (int i = 0; i < stateMachine.states.Length; i++)
            {
                // 2. Assign origin state. ChildAnimatorState is a Struct so each 'childState' is a new one.
                childStates _= stateMachine.states*;*_

// 3. Change new childState’s position.
childStates*.position = new Vector3(100, 0, 0); // Set your positions.*
}
// 4. ChildAnimatorState is Struct so we need to assign ‘childStates’ back to stateMachine.states.
stateMachine.states = childStates;
EditorUtility.SetDirty(controller);
}

AssetDatabase.Refresh();
AssetDatabase.SaveAssets();