Animation problem

Questions & Answers
1 
private var walkSpeed : float = 5.0;
private var jumpSpeed : float = 5.0;
private var jumpbooster : float = 25.0;
private var gravity = 100.0;
private var moveDirection : Vector3 = Vector3.zero;
private var charController : CharacterController;
static var Jumpboost: boolean = false;
var Jump : AudioClip;

function Start()
{
    charController = GetComponent(CharacterController);
   animation.wrapMode = WrapMode.Loop;

   animation["Scuttle"].layer = -1;
    animation["idle"].layer = -1;
   animation.Stop();
}

function Update ()
{
    if(charController.isGrounded == true)
    {

            animation.CrossFade("idle");

        transform.eulerAngles.y += Input.GetAxis("Horizontal");

        // Calculate the movement direction (forward motion)
        moveDirection = Vector3(0,0, Input.GetAxis("Vertical"));
        moveDirection = transform.TransformDirection(moveDirection);

        if(Input.GetButtonDown("Jump")){
        ///Insert Jump here(Input.GetButton ("Jump")) 
        if (Jumpboost == false){
        moveDirection.y = jumpSpeed;
            }
        if (Jumpboost ==true){
        moveDirection.y = jumpbooster;
        audio.PlayOneShot(Jump);
            }
        }

        if (Input.GetKeyDown(KeyCode.UpArrow)) {
    animation.CrossFade("Scuttle");
        }
        else if (Input.GetKeyDown(KeyCode.DownArrow)) {
    animation.CrossFade("Scuttle");
        }

    }

    moveDirection.y -= gravity * Time.deltaTime;
    charController.Move(moveDirection * (Time.deltaTime * walkSpeed));

}

I can't get the animation "scuttle" to play when I press the key. Any help?

2

Here's what your code is doing:

//...stuff...
function Update () { //Every frame
    if(charController.isGrounded == true) { //if grounded
        animation.CrossFade("idle"); //fade in idle

        //...stuff....

        //if other stuff, fade in Scuttle
        if(Input.GetKeyDown(KeyCode.UpArrow)
           || Input.GetKeyDown(KeyCode.DownArrow))
            animation.CrossFade("Scuttle");
    }
    //...stuff...
}

Since every frame it will fade in idle, even if Scuttle was fading in the frame before, idle will fade overtop the very next frame.

You should change it to something like:

//...stuff...
function Update () { //Every frame
    if(charController.isGrounded == true) { //if grounded
        //...stuff....

        //if other stuff, fade in Scuttle
        if(Input.GetKey(KeyCode.UpArrow)
           || Input.GetKey(KeyCode.DownArrow))
            animation.CrossFade("Scuttle");
        else animation.CrossFade("idle"); //fade in idle
    }
    //...stuff...
}
3

You can also try to put the idle animation layer to 0.