How to play an animation only once using Mecanim

Hey guys, I am with a little problem, I want to play the death animation from my boss object, so I just do this in my code:

Code (csharp):

1.         anim.SetBool( "isDead", true );

In the animator state machine I have a transition from "Any State" to "dead", which the condition is "isDead" == true. This transition works in the game but the animation is played in loop, the first time it plays like 80% of the animation and after it keeps playing until 60-70% of the animation and loop the animation. I want just to play the animation only one time and let the boss lied at the end. How can I do this? thanks

 

You should look at the tutorial by Will Goldstone, its all explained there. http://www.youtube.com/watch?v=Xx21y9eJq1U


You need to set it to false when you're transiting from a state to the dead state otherwise it will keep repeating.

Here's a short example:

Code (csharp):

1.  
2.  
3. public Animator anim;
4. static int m_deathStateId;
5.  
6. public void Awake()
7. {
8. // I assume your state is called Death and is in the base layer
9. m_deathStateId = Animator.StringToHash("Base Layer.Death");
10. }
11.  
12. public void Update()
13. {
14.  
15. // Check if your layer is transiting to Death
16. // I assume your transition is in the base layer
17. if(anim.IsInTransition(0)  m_anim.GetNextAnimatorStateInfo(0).nameHash == m_deathStateId)
18. anim.SetBool("isDead", false);
19. }
20.  

 

Hmmm that is true, if it comes from "any state", it can come from the dead state itself, I am so dumb

Thank you Alf, now it's working nice.

 

I've found using a simple Coroutine to work pretty well so far.

Define a method like this:

Code (csharp):

1.  
2.     public IEnumerator PlayOneShot ( string paramName )
3.     {
4.         _animator.SetBool( paramName, true );
5.         yield return null;
6.         _animator.SetBool( paramName, false );
7.     }
8.  

Then simply call it passing your Parameter name:

Code (csharp):

1.  
2.     StartCoroutine( PlayOneShot("Fire") );
3.  

Anyone see any short-comings with this approach?

 

Holy S*** Kinetifex! That actually works GREAT. Sooooo simple. And honestly, simplicity can be a far greater friend when dealing with the newness of mecanim considering it can get so damn garbled. Thanks Man!

 

Oh, that looks a nice trick. This has been rather annoying me, finding an appropriate time to clear these bools cleanly...

Really, I think there should be an option in the Mecanim state editor to auto-clear a bool when the state is entered. Or simply have a 'RequestState()' function, to enter a state if there's an appropriate transition available.

 

Thanks a lot for your response, but what happens when you have an actual game an at least 20 custom animations? You need to perform that check for each of them at every update. Doesn't feel very efficient

 

Hi,

You can use triggers instead of boolean values. Triggers reset themselves automatically. You don't need to reset them by code.

 

Sorry for the late reply. Raziel is right. Note that "triggers" for Mecanim have been available only since Unity 4.3 and at the time I answered that question, they were not available.