shooting in direction of mouse/crosshair

Code (csharp):

1. var prefabBullet: Transform;
2. var shootForce: float ;
3.  
4. function Update () {
5.  
6.    if(Input.GetButtonDown("Shoot")  )
7.    {
8.        var instancebullet =Instantiate( prefabBullet ,transform.position,Quaternion.identity);
9.        instancebullet.rigidbody.AddForce(transform.forward * shootForce);
10.    }
11.    
12. }

So that is how you shoot straight from an object, how would I instead shoot in the direction of the mouse cursor on the screen?

 

You can first create a ray using Camera.main.ViewportPointToRay and then use its direction property.

 

Code (csharp):

1. #pragma strict
2.  
3. var mainCamera : Camera;
4. var prefabBullet: Transform;
5. var shootForce: float ;
6.  
7. function Update () {
8.  
9.    if(Input.GetKeyDown(KeyCode.RightShift))
10.    {
11.        var ray : Ray = mainCamera.ScreenPointToRay (Vector3(Input.mousePosition.x,Input.mousePosition.y,0));
12.        
13.        var instancebullet =Instantiate( prefabBullet ,transform.position,Quaternion.identity);
14.        instancebullet.rigidbody.AddForce(ray.direction * shootForce);
15.    }
16.    
17. }

like that? it doesn't seem to quite behave right. The character is placed on the camera.

It seems to work up and down. It also works to the right, but not to the left.

 

I think you're not making a classic FPS game where cursor is always centered. How about this solution: create your Ray just like you did and then do a raycasting. If it hits something, then your shooting direction should be "hitPosition - transform.position". If raycast doesn't hit anything, then use "Camera.main.ScreenToWorldPoint ( new Vector3 ( Input.mousePosition.x, Input.mousePosition.y, 1000 ) )" as the value of hitPosition.

 

Yes I don't want the cursor always centred like a traditional FPS.

I finally realised my issue. Because I was creating it inside the character controller it was getting messed up when I shot. So I just made a game object as a child in front of it and works fine now!

 

You can create an gameobject at the center of the Screen as a child of the player and have lookAt script at the camera and move the projectile towards the gameobject