How to Chain of Explosion?

http://answers.unity3d.com/questions/160959/quotchain-of-explosionsquot-destroying-gameobjects.html

I asked this question recently and the solution that worked best was Using SendMessage to call a explosion function on the object.

A run down is, so say you have a bomb prefab, each has an overlap sphere which populates an array with all the colliders inside the spheres radius. What you want to do is attach a script to the bomb and make a destroy function that when called iterates through that array and sends the destroy function on those objects.

That should do the trick.

p.s. as SilverTabby pointed out its probably a good idea to leave a few frames between each destroy call so maybe add a few yields.

Here is my script

 using UnityEngine;
 using System.Collections;
 
 public class BombScript : MonoBehaviour {
         
     protected Collider[] radiusCollider;
     
     public static float radius = 3.0f;
     private float bornTime;
     private int bombTime = 5;
     
     // INIT
     void Start () {
         bornTime = Time.time;
     }
     
     // Update is called once per frame
     void Update () {
         radiusCollider = Physics.OverlapSphere(transform.position, radius);
         bombMechanics();
     }    
     
     void bombMechanics(){
 
 // This if statement is basically the bombs timer and is the second value is set in the bombTime variable 
        if((Time.time - bornTime) >= bombTime){        
 
 //This Destroy Call destroys the bomb you dropped once the time runs out.
             Destroy(this.gameObject);
 
 // This foreach iterates through all the colliders inside the overlap sphere and sendMessages the bombExplode method
 
             foreach (var bombInstance in radiusCollider) {
                 bombInstance.SendMessage("bombExplode", SendMessageOptions.DontRequireReceiver);
             } 
        }
     }
     
     IEnumerator bombExplode(){
 
 // after this is called it waits for a 10th of a second and then calls destroy on this object (for the sake of explanation this would be all
 // the other bombs that were in the overlap sphere)
 
             yield return new WaitForSeconds(0.1f);
             Destroy(this.gameObject);
 
 // this then checks all of the objects that was in its radius spheres before they were destroyed and sends the message to run this method //and so on... until all the bombs are destroyed
 
         foreach (var bombInstance in radiusCollider) {
                 bombInstance.SendMessage("bombExplode", bombInstance, SendMessageOptions.DontRequireReceiver);
             }
     }
 }