Hi all, im quite new to Unity and am working on a simple shooter on rails, however I am having trouble getting the projectiles when you shott to head out in the right direction.

I have made a gun object that is attatched to the camera, I need the gun object to shoot out wherever the player clicks, im not sure if this is the best way to do it or if I should maybe use raycasting instead?.

Here is the code I have so far, any help would be greatly appreciated.

#pragma strict
var projectile : Rigidbody;
var speed = 20;
var mousex = 0;
var mousey = 0;
var gun : GameObject;

function Start () {

}

function Update () {
  mousex = Input.mousePosition.x/2;
  mousey = Input.mousePosition.y/2;
  gun.transform.LookAt(Vector3(mousex,mousey,0));

  if (Input.GetButtonDown("Fire1"))
  {
    var instantiatedProjectile : Rigidbody = Instantiate( projectile, transform.position, transform.rotation);
    instantiatedProjectile.velocity = transform.TransformDirection( Vector3(0,0, speed));
    Physics.IgnoreCollision( instantiatedProjectile. collider,transform.root.collider);
  }
}