Score/point counter system

I have scattered targets placed throughout my sandbox fps-like game. These targets each have the following code equipped:

var hitPoints = 100.0; var detonationDelay = 0.0; var explosion : Transform; var deadReplacement : Rigidbody; function ApplyDamage (damage : float) { // We already have less than 0 hitpoints, maybe we got killed already? if (hitPoints <= 0.0) return; hitPoints -= damage; if (hitPoints <= 0.0) { // Start emitting particles var emitter : ParticleEmitter = GetComponentInChildren(ParticleEmitter); if (emitter) emitter.emit = true; Invoke("DelayedDetonate", detonationDelay); } }

function DelayedDetonate () { BroadcastMessage ("Detonate"); }

function Detonate () { // Destroy ourselves Destroy(gameObject); // Create the explosion if (explosion) Instantiate (explosion, transform.position, transform.rotation);

// If we have a dead barrel then replace ourselves with it! if (deadReplacement) { var dead : Rigidbody = Instantiate(deadReplacement, transform.position, transform.rotation); // For better effect we assign the same velocity to the exploded barrel dead.rigidbody.velocity = rigidbody.velocity; dead.angularVelocity = rigidbody.angularVelocity; }

// If there is a particle emitter stop emitting and detach so it doesnt get destroyed // right away var emitter : ParticleEmitter = GetComponentInChildren(ParticleEmitter); if (emitter) { emitter.emit = false; emitter.transform.parent = null; } } // We require the barrel to be a rigidbody, so that it can do nice physics @script RequireComponent (Rigidbody)

For each target destroyed I would like a set amount of points to be added to a counter/score system...

Any suggestions to how I can execute this efficiently? Also how would I associate the concept to creation of new GUIskin??

Thanks.