StateMachineBehaviours - Get from Editor Script

Hi There,

I want to use an editor script to set a state machine behaviour property from the editor. My code looks something like:

Code (CSharp):

1. [UnityEditor.MenuItem("Set Sprites With Tag On Behaviour")]
2. static void SetSpritesWithTagOnBehaviour ()
3. {
4.     Sprite[] mySprites = FindSpritesFromPackingTagInImporters();
5.  
6.     Animator animator = GameObject.Find ("MyStateMachine").GetComponent<Animator> ();
7.     MyBehaviour behaviour = animator.GetBehaviour<MyBehaviour> ();
8.  
9.     behaviour.sprites = mySprites;
10. }

However from my static editor script function, behaviour is null, even though it exists on the animator.

From the docs (https://unity3d.com/learn/tutorials/modules/beginner/5-pre-order-beta/state-machine-behaviours) I can see that GetBehaviour may only be valid from 'start'. However I need to be able to set my state machine behaviour properties offline.

Of course I can do this directly through the UI (go to the animator, pick a state machine behaviour and change a public property) without running the game, so I assume I can also do this somehow through an editor script. Is this functionality possible? Or currently a limitation?

 

There is two thing, the animator controller and the animator.

The animator controller is an asset which contains statemachine, state and state machine behaviour. This is the asset that you build in the editor.

The animator is the component that take care of evaluating the controller and manage all runtime instance.
Animator.GetBehaviour<>() will return instance of SMB only when the game is running.


So in your case you want to setup your controller, unfortunately there is no function like GetBehaviours<> that take a type as parameter and return all behaviour that match, you will need to check every controller's state and statemachine to find where your behaviour is stored.
http://docs.unity3d.com/ScriptReference/Animations.AnimatorState-behaviours.html
http://docs.unity3d.com/ScriptReference/Animations.AnimatorStateMachine-behaviours.html
http://docs.unity3d.com/ScriptRefer...orController.GetStateEffectiveBehaviours.html

I will add a new function AnimatorController.GetBehaviours<>, I think it make sense when you want to setup behaviour from script. unfortunately it won't be available until our next release.

Best regards,

 

Ah I see, thanks for the clarity! And thanks for adding the API for the next release, That will be ideal.

Looking forward to 5.1

The code based on your explanation is the following (for anyone else curious):

Code (CSharp):

1.         Animator animator = GameObject.Find ("MyStateMAchine").GetComponent<Animator> ();
2.         UnityEditor.Animations.AnimatorController controller = animator.runtimeAnimatorController as UnityEditor.Animations.AnimatorController;
3.  
4.         foreach (AnimatorControllerLayer layer in controller.layers)
5.         {
6.             foreach (ChildAnimatorState childAnimState in layer.stateMachine.states)
7.             {
8.                 foreach(StateMachineBehaviour smb in childAnimState.state.behaviours)
9.                 {
10.                     MyBehaviour myBehaviour = smb as MyBehaviour;
11.  
12.                     if (myBehaviour != null)
13.                     {
14.                         if (myBehaviour.identiferString == myString)
15.                         {
16.                             myBehaviour.param = newvalue;
17.                         }
18.                     }
19.                 }
20.             }
21.         }

 

yes that cover the animator state, beware that you can put SMB on statemachine too, also if you have some synchronized layer you may need to check for this too
http://docs.unity3d.com/ScriptRefer...orController.GetStateEffectiveBehaviours.html