Transfering variables back through raycast

Unity Engine
1

If I use sendmessage for a raycast for the hit object to deal damage to an enemy is there a way to send a return variable back to the player if the enemy was hit? I have the dealing damage part working but after damage is dealt I want to check if the enemy is dead and then send back a new message to give xp to the player for what level the enemy was.

2

Create a wrapper class that contains the damage to deal and the dealer of that damage and send that as the param in SendMessage.

3

Quick example? Tried looking it up but couldn’t find anything specific. By the way I’m using Javascript.

4

Off the top of my head - but should give you the idea.

public class DamagePacket
{
    float Damage;
    GameObject Sender;

    public DamagePacket(float damage, GameObject sender)
    {
        this.Damage = damage;
        this.Sender = sender;
    }
}

public void DoDamage()
{
    RaycastHit hit;
    if (Physics.RayCast(...))
    {
        DamagePacket p = new DamagePacket(30f, gameObject);
        hit.gameObject.SendMessage("TakeDamage", p);
    }
}

public void TakeDamage(DamagePacket p)
{
    this.Health -= p.Damage;
    if (p.Sender != null)
        p.SendMessage("GotHit", gameObject);
}

public void GotHit(GameObject target)
{
    Debug.Log("I just hit " + target.Name + "!");
}
5

Looks like unity’s "java"script supports classes too…

http://wiki.unity3d.com/index.php?title=UnityScript_versus_JavaScript#JavaScript_is_class-free

… any one got a better reference on how they work?

6

Ah I see so you can setup a simple sender variable as a gameObject to be able to return the information. So would scripts 1,2,and 4 all be in one single script on the player firing? Then the 3rd script would be on the enemy? I haven’t worked much with classes before, I always end up getting errors. This helps me out a ton though, now I understand what you were saying.