Bullet to move along Raycast

Hi, I'm trying to get it so my bullet moves along the raycast when i press Fire1 in this javascript. Its attached to my main camera which is a child of my third person character. A couple of things, 1) Nothing actually happens when i press fire1, i'm expecting to see my bullet travel along the raycast, 2) does it have to be a rigidbody or a transform for the bullet to appear? Its giving me the NullReferenceException: Object reference not set to an instance of an object at line 10 and 12, is this my problem? - and can someone explain what that error means?

Code (JavaScript):

1. #pragma strict
2.  
3. var projectile : Rigidbody;
4. var speed = 20;
5.  
6. function Update () {
7.     if (Input.GetButtonDown("Fire1"))
8.     {
9.     var hit : RaycastHit;
10.     var ray : Ray = Camera.main.ScreenPointToRay(Vector3(Screen.width*0.5, Screen.height*0.5));      
11.        
12.         if (Physics.Raycast (ray, hit))
13.         {
14.             Debug.DrawLine(transform.position, hit.point, Color.red);
15.             Debug.Log(hit.point);
16.             var instantiatedProjectile : Rigidbody = Instantiate(projectile, transform.position, transform.rotation);
17.             instantiatedProjectile.velocity = (hit.point - transform.position).normalized * speed;
18.             instantiatedProjectile.rotation = Quaternion.LookRotation(instantiatedProjectile.velocity);
19.         }
20.     }
21. }

 

Instantiate GameObjects, not Rigidbodies. Also, does the raycast actually hit something? Why do you want to use raycast for firing bullets?

 

Well, what i was trying to do was to get it so that the bullet travels in a straight line along the raycast - without being affected by gravity. I had a script before i did that which used instantiate - i could never get it so i travels in a straight line without being affected by gravity - and that script did require a rigidbody on the bullet in order for it to fire.

 

All you have to do is turn off the gravity in the inspector for the instantiated object in this case the bullet. Look under rigid body component and uncheck "use gravity" that should do it. You wont need to use the rayscast at that point.

 

lol