MecAnim SubState Animation Complete

Question

Hi folks,

Browsing around online, I've seen a lot of questions and answers revolved around determining if a specific animation is playing or not. What I need to do is check if any animation in a particular sub-state is playing.

Instead of storing the hash for every animation in a sub-tree (and having to add code each time a new animation is added), I'd rather simply make a check to see if any animation inside my sub-state is playing or not.

Is that feasible at all?

Answer 1

Answer by Ash-Blue · Jun 08, 2015 at 01:47 PM

Attempting this in Unity 4.6 and below will result in a huge mess of unmaintainable code (made that mistake a while back). But with Unity 5's shiny new State Machine Behaviours you can easily monitor a sub-state with a few lines of code. In order to do this we'll need to monitor a bool parameter on our Animator component.

Add a new bool to the animator representing when you are in your sub-state such as "attacking." This worked best for me since I'm monitoring the end of my attack animation sub-state.

On your desired sub-state machine, add this script by selecting it and clicking "Add Behaviour".

 public class SubStateMonitor : StateMachineBehaviour {
    [SerializeField] string myBool;

     override public void OnStateEnter(Animator anim, AnimatorStateInfo stateInfo, int layerIndex) {
         anim.SetBool(myBool, true);
     }
 
     override public void OnStateExit(Animator anim, AnimatorStateInfo stateInfo, int layerIndex) {
         anim.SetBool(myBool, false);
     }
 }

You can now check if the sub-state machine is running anywhere with the following code snippet.

 Animator anim = GetComponent<Animator>();
 bool isSubState = anim.GetBool(myBool);

For more info on State Machine Behaviors please see the following resources.

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josencv · Nov 23, 2015 at 02:12 AM 0

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Works perfectly! I think you forgot to mention that you have to set the animator variable name in the new behaviour in the editor. In your case, "attacking". Thanks!

Ash-Blue josencv · Nov 23, 2015 at 05:00 AM 0

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Animator var would have to be set like you said. I skipped over that since I was guessing that would be assumed. Good point though for people who aren't used to working with the Animator component.

TheWarper · Aug 02, 2017 at 12:27 AM 0

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Ah, unfortunately doesn't work for me since an AnyState transition can occur in the root, bypassing any Exit's from the SSM i.e. the OnStateExit() never fires and the boolean stays true.

Ash-Blue TheWarper · Aug 03, 2017 at 03:08 PM 0

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I thought any state always triggered OnExit for the currently playing item. You could always have the any state command reset your variables to the original defaults with a script or component.

MecAnim SubState Animation Complete

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