How do I make an Instantiated Projectile travel towards Center of Screen

Questions & Answers
1

I’m using this code to instantiate a projectile and get it to travel forward.

function Update ()
{
    if(Input.GetButtonDown("Fire1"))
    {
        var starburstInstance : Rigidbody;
        starburstInstance = Instantiate(starburstPrefab, starburstGunEnd.position, starburstGunEnd.rotation);
        starburstInstance.AddForce(starburstGunEnd.forward * 2500);
        audio.PlayOneShot(starburst);
    }
}

All was fine until I added a hide cursor and add crosshair script. Now I suddenly realise that my targeting/aiming is way off.
How can I change (or replace) this line of code so the object will effectively travel towards where the crosshair was positioned and not just directly forwards?

starburstInstance.AddForce(starburstGunEnd.forward * 2500);

(Crosshair is positioned in center screen, attached to main camera)

Any ideas guys???

2

Getting the following errors

Assets/Scripts/InstantiateReaperDisc.js(14,78): BCE0017: The best overload for the method ‘UnityEngine.Camera.ScreenToViewportPoint(UnityEngine.Vector3)’ is not compatible with the argument list ‘(int, int)’.

Assets/Scripts/InstantiateReaperDisc.js(15,39): BCE0023: No appropriate version of ‘UnityEngine.Transform.LookAt’ for the argument list ‘(UnityEngine.GameObject)’ was found.

???