How can i use the Animator in script to find when animation clip finished playing and then stopping the animation ?

Question

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class AnimationCamera : MonoBehaviour
 {
     public Camera animationCamera;
     public Camera mainCamera;
     Animator _anim;
     AnimatorStateInfo currInfo;
     float animationnormalizedTime;
 
 
     private void Start()
     {
         animationCamera.enabled = false;
         mainCamera.enabled = true;
         _anim = GetComponent<Animator>();
 
         currInfo = _anim.GetCurrentAnimatorStateInfo(0);
         animationnormalizedTime = currInfo.normalizedTime;
     }
 
     private void Update()
     {
         if (currInfo.length == animationnormalizedTime)
         {
             _anim.CrossFade("Animation_Idle", 0);
         }
 
         if (Input.GetKeyDown(KeyCode.C))
         {
             animationCamera.enabled = !animationCamera.enabled;
             mainCamera.enabled = !mainCamera.enabled;
 
             if (animationCamera.enabled)
             {
                 _anim.CrossFade("Animation_Sign", 0);
             }
             else
             {
                 _anim.CrossFade("Animation_Idle", 0);
             }
         }
     }
 
     public void PlaySignAnimation()
     {        
         animationCamera.enabled = true;
         _anim.CrossFade("Animation_Sign", 0);
     }
 }

I'm trying to use the currInfo. I want to find the animation clip length and also how much time currently passed since the animation clip started. Then to compare the values and in the end to make it "Animation_Idle".

Sub question: "Animation_Idle" is a state i created in the Animator window so it will not play anyt$$anonymous$$ng. But maybe it's the wrong way to stop animation using Animator. Should i use somet$$anonymous$$ng else to stop the animation instead using "Animation_Idle" ?

Answer 1

Hi,

I t$$anonymous$$nk your script is already on the right path, but none the less, I try to give a complete answer to the question below. If you have a transition "On Exit Time" set from your current state, you could simply check when the current animation state name is not your previous animation anymore. Else you can work with the normalizedTime, like you already do in your script.

You can get the current state info with Animator.GetCurrentAnimatorStateInfo. If called with a parameter 0, you should get the currently active animation state: animator.GetCurrentAnimatorStateInfo(0) where animator is the variable that stores your Animator. You can then proceed to check the animation you are in, for example by comparing the name of the current animation:

 if (animator.GetCurrentAnimatorStateInfo(0).IsName("Animation_Idle")){ }

You can get the time of the current state via the normalizedTime, t$$anonymous$$s is a float value between 0 and 1 where as 0 is the very start of the animation and 1 is the end of the animation. T$$anonymous$$nk of it as how many percent of the animation has been played. for example a normalizedTime of 0.34 means that 34% of the animation has been played. Without testing it, but after looking in the Unity docs, I t$$anonymous$$nk you can access the normalizedTime of the current animation like t$$anonymous$$s.

 animator.GetCurrentAnimatorStateInfo(0).normalizedTime

Somet$$anonymous$$ng I noticed about your script, at line 26: Do not do t$$anonymous$$s:

 if (currInfo.length == animationnormalizedTime)

Instead, check if the value is above a threshold instead of an exact value. Also, let's say you want to switch from "Animation_Idle" to another state, do t$$anonymous$$s instead (you don't want to call your animation switch function in every animation state or do you?). Also, forget currInfo.length, set the normalizedTime, when you want to exit as a separate variable.

 if (currInfo.IsName("Animation_Idle") && currInfo.normalizedTime >= customSetNormalizedTime)

The last t$$anonymous$$ng is, I t$$anonymous$$nk you have to call currInfo = _anim.GetCurrentAnimatorStateInfo(0); in your Update() function, not the start function. Else I believe you will have the same currInfo in every update (the currInfo you got in the Start() function), but you want to have the currInfo of the current frame.

However, for switc$$anonymous$$ng between animation states, I t$$anonymous$$nk setting up transitions in the Animator itself is preferable to control everyt$$anonymous$$ng from script. Then maybe set variables in your animator and transition conditions for animation states that depend on the variable values. You can then communicate with the Animator in the script. If you are trying to learn Unity's animation system or if it still feels unfarmiliar to you, and if you have the time, maýbe check out t$$anonymous$$s video:

https://www.youtube.com/watch?v=wdOk5QXYC6Y

Also, if you don't know how to get a certain value from the Animator or other classes, make sure you check the API docs first, since they describe every possible function and method you can call on certain Unity classes:

https://docs.unity3d.com/ScriptReference/Animator.html

If hope I could help you!

How can i use the Animator in script to find when animation clip finished playing and then stopping the animation ?

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