Damage sending with grenades.

Questions & Answers
1

Okay I’ve been trying to create a script that applies damage to rigid bodies through an explosion radius but the message I’m trying to send to another script doesn’t seem to be sending. I’m not getting any error messages or anything the only thing I can think of is the the message has no where to go or the message is receiving but not applying. the action of actual force is working fine though.

This is the script I have so far.

using UnityEngine;
using System.Collections;

public class Grenade : MonoBehaviour {

public float radius = 5.0f,
power = 10.0f,
explosiveLift = 1.0f,
explosiveDelay = 5.0f;

void Update (){
	explosiveDelay -= Time.deltaTime;
	if (explosiveDelay <= 0){
		Vector3 grenadeOrigin = transform.position;
		Collider[] colliders = Physics.OverlapSphere (grenadeOrigin, radius);
		foreach (Collider hit in colliders){
			Rigidbody rb = hit.GetComponent<Rigidbody>();
			if (rb){
				rb.AddExplosionForce(power, grenadeOrigin, radius, explosiveLift);
				//This is where we apply force to our enemy and various other rigid bodies 
				hit.SendMessageUpwards("Damager", 100, SendMessageOptions.DontRequireReceiver);
				//This is where we apply damage to the enemy
				Destroy(gameObject);
			}
		}
	}
}

}

and this is my health script for my enemy

using UnityEngine;
using System.Collections;

public class EnemyHealth : MonoBehaviour {
	public int maxHealth = 100;
	public int curHealth = 100;

	// Use this for initialization
	void Start () { }
	
	// Update is called once per frame
	void Update () {
		if (curHealth < 1) {
			Destroy (gameObject);
		}
	}
	void OnTriggerEnter(Collider other){
		if (other.gameObject.tag == "Bullet"){
			curHealth -= 20;
		}
	}
	// this is where our explosion should be inputing damage
	void Damager(int curDamage){
		curHealth -= curDamage;
	}
}
2

Most likely the EnemyHealth script is not directly on hit.gameobject or one of its ancestors, as @Mouton explained.

Unless you have a very specific reason to use SendMessageUpwards(), you should use GetComponent() or GetComponentInChildren() for better performance. So, the following should work (in place of the hit.SendMessageUpwards instruction):

hit.transform.root.GetComponentInChildren<EnemyHealth>().Damager(100);

Edit: The Damager() method needs to be made public.