making the weapon shoot whatever the crosshair is on

[Ziad]

i’m making FPS Game and i want the projectile to go at the center of the screen… no mater how far or how near is the object that i’m looking at

[aldonaletto]

You can use ViewportPointToRay to create a ray from the screen center and get the hit point as your target, then get the direction from the vector (hit.point - spawnPoint.position):

EDITED: Altered to shoot even when nothing was hit by the raycast - it uses the ray direction in this case:

var rocketPrefab: Transform; // your rocket prefab
var rocketSpeed: float = 20; // rocket speed
var spawnPoint: Transform; // empty object which defines the spawn point

function Update () {
  if (Input.GetButtonDown("Fire1")){
    // create a ray from the center of the screen
    var ray: Ray = Camera.main.ViewportPointToRay(Vector3(0.5,0.5,0));
    var hit: RaycastHit;
    var dir: Vector3;
    if (Physics.Raycast(ray, hit)){ // if something aimed
      // find the direction from spawnPoint to the target
      dir = (hit.point - spawnPoint.position).normalized;
    }
    else {
      // if there's nothing, use the ray direction
      dir = ray.direction; // spawnPoint.forward works too (see note below)
    }
    // ensure the rocket will born pointing to the target
    var rot = Quaternion.FromToRotation(rocketPrefab.forward, dir);
    // instantiate the rocket
    var rocket = Instantiate(rocketPrefab, spawnPoint.position, rot);
    // launch the rocket
    rocket.rigidbody.velocity = dir * rocketSpeed;
  }
}

NOTE: An alternative could be to use the spawnPoint.forward direction instead of ray.direction. This makes little difference unless the spawPoint is much lower than the camera.

[Bosstvgames]

The script works GREAT! but I have one question I`m making a fps game so I would like to have the gun shoot straight at the cursor or at the cross hair its set at the middle of the screen so please help me if can!