FPS Projectiles launching backwards

Questions & Answers
1

Yep, just what the title says. First, the projectile script:

// The reference to the explosion prefab

var explosion : GameObject;
var timeOut = 3.0;

// Kill the rocket after a while automatically
function Start () {
Invoke(“Kill”, timeOut);
}

function OnCollisionEnter (collision : Collision) {
// Instantiate explosion at the impact point and rotate the explosion
// so that the y-axis faces along the surface normal
var contact : ContactPoint = collision.contacts[0];
var rotation = Quaternion.FromToRotation(Vector3.up, contact.normal);
Instantiate (explosion, contact.point, rotation);
transform.Translate(-Vector3.forward * Time.deltaTime);

// And kill our selves
Kill ();

}

function Kill () {
// Stop emitting particles in any children
var emitter : ParticleEmitter= GetComponentInChildren(ParticleEmitter);
if (emitter)
emitter.emit = false;

// Detach children - We do this to detach the trail rendererer which should be set up to auto destruct
transform.DetachChildren();
	
// Destroy the projectile
Destroy(gameObject);

}

Now, the Launcher:

var projectile : Rigidbody;
var initialSpeed = 20.0;
var reloadTime = 0.5;
var ammoCount = 20;
private var lastShot = -10.0;

function Fire () {
// Did the time exceed the reload time?
if (Time.time > reloadTime + lastShot && ammoCount > 0) {
// create a new projectile, use the same position and rotation as the Launcher.
var instantiatedProjectile : Rigidbody = Instantiate (projectile, transform.position, transform.rotation);

	// Give it an initial forward velocity. The direction is along the z-axis of the missile launcher's transform.
	instantiatedProjectile.velocity = transform.TransformDirection(Vector3 (0, 0, initialSpeed));

	// Ignore collisions between the missile and the character controller
	Physics.IgnoreCollision(instantiatedProjectile.collider, transform.root.collider);
	
	lastShot = Time.time;
	ammoCount--;
}

}

2

Your problem may well be that the speed of the projectiles is “backwards” to the player. Just put a minus (-) sign before the speed when you instantiate it (the z part of the Vector3).