Sending Messages to Other game Objects?

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1

I have a gun that shoots at a box which is the enemy and I need that to send a message to my player and gun so that the exp for the mastery of the gun and the exp for the player are both increased. How would I do this? I have tried putting a Broadcast message on bullet prefab so when it contacts the box the box dies and its sends out the message but it says that the message has no receiver. I think it is because the gun is not a child of the cube so send and broadcast message will not work. Can someone point me in the direction of a tutorial or a script that can help me send messages between different gameObjects and not just to childs of a gameObject. All help is appreciated, Thank you. Here is the script for the bullet:

var target : GameObject;

function OnCollisionEnter(collision : Collision)
{
    if(collision.gameObject.tag == "enemybox")
    {
        Destroy(collision.gameObject);  // Destroys Health Box
        target.BroadcastMessage("addExp");
    }
}

and the script for the gun where the exp is handled is:

var gunHealth : float = 100;
private var maxgunHealth : float = 100;
private var brokenHealth : float = 30;
private var destroyed : float = 0;
var broken = false;
var unusable = false;
//ammo debugging
var ammo : int = 10;
var maxammo : int = 10;
private var emptyammo : int = 0;
var clipammo : int;
private var noclipsammo : int = 0;
var empty = false;
var reloading = false;
var noClips = false;
//exp
var masteryExp : float = 0;
private var leastmasteryExp : float = 0;
var maxmasteryExp : float = 100;
var levelofMastery : int = 1;
var maxlevelofmastery : int = 10;
var master = false;
var damage : int = 5;
//GUI 
var barDisplay : float = 0;
var pos : Vector2 = new Vector2(20,40);
var size: Vector2 = new Vector2(Screen.width / 2  ,20);
var posoftext : Vector2 = new Vector2(20,40);
var sizeoftext : Vector2 = new Vector2(Screen.width / 2 ,20);
var progressBarEmpty : Texture2D;
var progressBarFull : Texture2D;
private var dead = false;
var myskin : GUISkin;
var mystyle : GUIStyle;
function Start(){
    //need to add the reloading animation
    animation["trigger"].wrapMode = 
    WrapMode.Once;
    animation["trigger"].layer = 1;
    animation.Stop();
}

function Update (){

    if (Input.GetMouseButtonUp(0)){
    animation.Play("trigger");
    }
    if (Input.GetMouseButtonUp(0))
    gunHealth -= .5;
    if (Input.GetMouseButtonUp(0))
    ammo -= 1;
    if (gunHealth <= brokenHealth){
        broken = true;
    }
    if (gunHealth <= destroyed){
        unusable = true;
        gunHealth = destroyed;
    }
    if (gunHealth >= maxgunHealth){
    gunHealth = maxgunHealth;
    }
    if (ammo >= maxammo){
    ammo = maxammo;
    }
    if (ammo <= emptyammo){
    ammo = emptyammo;
    empty = true;
    clipammo -= 1;
    }
    if (clipammo <= noclipsammo){
    clipammo = noclipsammo;
    noClips = true;
    }
    if (masteryExp <= leastmasteryExp){
    masteryExp = leastmasteryExp;
    }
    if (masteryExp >= maxmasteryExp){
    levelofMastery += 1;
    masteryExp = 0;
    maxmasteryExp += 50;
    damage += 3.5;
    }
    if (levelofMastery >= maxlevelofmastery){
    levelofMastery = maxlevelofmastery;
    masteryExp = 0;
    master = true;
    }
    barDisplay = masteryExp;
}

function LateUpdate(){
    if (broken){
        Debug.Log("item is now broken. Get repaired soon");
        //I need a GUI message here also that says what is said above.
    }
    if (unusable){
        Debug.Log("item is now unusable");
        Destroy(gameObject);
        //this is where I need the GUI message to go
    }
    if (empty){
    Debug.Log("start reloading");
    reloading = true;
    }
    if (reloading){
    Debug.Log("reloading now");
    ammo = 10;
    empty = false;
    reloading = false;
    }
    if (noClips){
    Debug.Log("no more ammo available");
    ammo = 0;
    //I need the gun shooting script to stop and I need it to play a clicking sound here when they try and shoot
    }
    if (master){
    Debug.Log("you are now a master with this weapon");
    damage = 35;
    }

}

function OnGUI()
{
    GUI.skin = null;
    // draw the background:
    GUI.BeginGroup (new Rect (pos.x, pos.y, size.x, size.y));
        GUI.Box (Rect (0,0, size.x, size.y),progressBarEmpty);
    GUI.skin = myskin;
        // draw the filled-in part:
        GUI.BeginGroup (new Rect (0, 0, size.x * (masteryExp / maxmasteryExp), size.y));
            GUI.Box (Rect (0,0, size.x, size.y),progressBarFull);
        GUI.EndGroup ();

    GUI.EndGroup ();
    GUI.Label(Rect(posoftext.x,posoftext.y,sizeoftext.x,sizeoftext.y), "Level Of Mastery " + levelofMastery, mystyle);
} 
function addgunExp(){
    masteryExp += 10;
}

The exp system works the same for both the gun and the player so I just need help sending the message to the indivisual game Objects Thank you.

2

If you have set the gun as target, you're nearly there - you have a spelling mistake in the BroadcastMessage

Your function is addgunExp, but you're trying to call addExp

Also - if you want to send a message to just the one gameobject, use SendMessage