Move Character

gistfile1.js

#pragma strict

var forwardSpeed = 10;
var backwardSpeed = 8;
var sideSpeed = 10;

var xDisplacement:float;
var zDisplacement:float;
var displacement:Vector3;

function Update () {
    if(Input.GetKey("w")){
        //up
        xDisplacement = Mathf.Sin(Mathf.Deg2Rad * transform.eulerAngles.y);
        zDisplacement = Mathf.Cos(Mathf.Deg2Rad * transform.eulerAngles.y);

        displacement = Vector3(xDisplacement, 0, zDisplacement) * forwardSpeed * Time.deltaTime;
        transform.position += displacement;
    }
    if(Input.GetKey("s")){
        //down
        xDisplacement = Mathf.Sin(Mathf.Deg2Rad * transform.eulerAngles.y);
        zDisplacement = Mathf.Cos(Mathf.Deg2Rad * transform.eulerAngles.y);

        displacement = Vector3(xDisplacement, 0, zDisplacement) * forwardSpeed * Time.deltaTime;
 
        transform.position -= displacement;
    }
    if(Input.GetKey("a")){
        //left
        xDisplacement = Mathf.Sin(Mathf.Deg2Rad * (transform.eulerAngles.y + 90));
        zDisplacement = Mathf.Cos(Mathf.Deg2Rad * (transform.eulerAngles.y + 90));
  
        displacement = Vector3(xDisplacement, 0, zDisplacement) * forwardSpeed * Time.deltaTime;
  
        transform.position -= displacement;
    }
    if(Input.GetKey("d")){
        //right
        xDisplacement = Mathf.Sin(Mathf.Deg2Rad * (transform.eulerAngles.y + 90));
        zDisplacement = Mathf.Cos(Mathf.Deg2Rad * (transform.eulerAngles.y + 90));
  
        displacement = Vector3(xDisplacement, 0, zDisplacement) * forwardSpeed * Time.deltaTime;
  
        transform.position += displacement;
    }
}