StateMachineBehaviour.OnStateEnter Question

Isn't this message supposed to be sent on the first frame of an animation state's loop? I'm only getting the message when the animator first hits that state, but on subsequent loops it won't keep firing.

I've heard frame events are somewhat unreliable due to transitions, so what are the recommended ways to execute a command once per animation-state cycle?

 

No, it's called when the state is entered. A looping animation enters its state once, it doesn't keep re-entering it at the end of every loop.

What are you actually trying to do with the event?

 

private int currentLoopIndex = 0;
public override void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
{
base.OnStateUpdate(animator, stateInfo, layerIndex);
if((stateInfo.normalizedTime) / stateInfo.length> currentLoopIndex){

//var value = Random.Range(clampRandom.x, clampRandom.y);
//animator.SetInteger(parameterName, value);
// do you thing
currentLoopIndex++;

}
}

 

There's no need to divide stateInfo.normalizedTime by stateInfo.length because the time is already normalized (each increment of 1.0f represents a full loop). This should look something like this:

Code (CSharp):

1. private int currentLoopIndex = 0;
2. public override void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
3. {
4.     base.OnStateUpdate(animator, stateInfo, layerIndex);
5.  
6.     if (Mathf.FloorToInt(stateInfo.normalizedTime) > currentLoopIndex)
7.     {
8.         // do your thing
9.         currentLoopIndex++;
10.     }
11. }