CODEWITHSUNDEEP
c#unity-game-engineanimator
Job_September_2020
Job_September_2020

Reputation: 880

Error message when calling Unity Animator.Play() : Invalid Layer -1?

I am trying to do a simple animation with a simple state machine, but Unity prints out an error message:

Invalid Layer Index '-1' UnityEngine.Animator:Play(String, Int32, Single)

I have verified that my animator state machine is located in the "Base Layer", which should have the ID = -1 by default.

In addition, I have printed out all the layer IDs in my games, and they are all "-1", and I am not sure if that is the correct answer because I thought that each layer should have a unique (or different) ID ?

However, regardless, Unity still prints out the same error above unfortunately.

I am using the latest version of Unity 5.5.2

Here is the code:

using UnityEngine;

public class Thanh_Space_Man : MonoBehaviour {

    public Animator anim;

    // Use this for initialization
    void Start () 
    {
        anim = GetComponent<Animator> ();   
    }

    // Update is called once per frame
    void Update () 
    {   

        if(Input.GetKeyDown("1"))
        {           
            anim.Play ("Run_Rifle_Foreward", -1, 0f);           
        }

        if(Input.GetKeyDown("2"))
        {
            anim.Play ("Idle_Rifle_01", -1, 0f);
        }


    }
}

FYI: I am a beginner in Unity. :-)

Upvotes: 1

Views: 8612

Answers (2)

user2200825
user2200825

Reputation: 1

I had same problem. The reason was that I added a new object with a new animator but forgot to change in the Awake:

_myAnimator = FindObjectOfType<Animator>(); // just one animator in scene

to

_myAnimator = GetComponent<Animator>(); // own animator of that object

After changing those lines for both objects everything worked fine.

Upvotes: 0

Fredrik
Fredrik

Reputation: 5108

These are the values I get when using LayerMask.NameToLayer where "CustomLayer" is a layer I created manually in the Tags & Layer manager. 

Debug.Log(LayerMask.NameToLayer("asd")); // => -1
Debug.Log(LayerMask.NameToLayer("UI")); // => 5
Debug.Log(LayerMask.NameToLayer("CustomLayer")); // => 8
Debug.Log(LayerMask.NameToLayer("customlayer")); // => -1
Debug.Log(LayerMask.NameToLayer("Default")); // => 0

Update:

OP found the issue:

I've just figured out that the error is that I was incorrectly spelled the name of the animation state when I called Animator.Play(). After I use the correct name of the state, then it works fine. It is even more interesting that regardless of whether I pass in the Layer ID as 0 or -1, when I call Animator.Play(), it works in both cases.

Upvotes: 1

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