#pragma strict

private var charController : CharacterController;
private var theTransform : Transform;
private var charHeight : float; //Initial height

function Start ()    
{
    theTransform = transform;
    charController = GetComponent(CharacterController);
    charHeight = charController.height;
}

function Update ()    
{
    var h = charHeight;
       
    if (Input.GetKey("c"))
    {
     h = charHeight*0.5;
    }
       
    var lastHeight = charController.height; //Stand up/crouch smoothly
    charController.height = Mathf.Lerp(charController.height, h, 5*Time.deltaTime);
    theTransform.position.y += (charController.height-lastHeight)/2; //Fix vertical position
}