Explosion triggers another explosion

This answer is what I did to make something like what the question is asking about - a chain of explosions like what you get with bomb flowers in Legend of Zelda: Ocarina of Time.

For a little more detail, you'd make, for example, a class called ExploderClass, and in C# do:

 using UnityEngine;
 using System.Collections;

 public class ExploderClass : $$anonymous$$onoBehaviour {
     //used with Invoke() to cause chained explosions 
     //to happen one after the other, rather than 
     //all simultaneously
     private const int ExplosionDelay = 0.1f;
     private const float ExplosionRadius = 2f;
     public Layer$$anonymous$$ask layer$$anonymous$$ask; //set this to whatever layers you want to get hit by the explosion

     //causes explosion to happen
     public void Explode() {
         //get all colliders this explosion will hit
         Collider[] colliders = Physics.OverlapSphere(transform.position,ExplosionRadius,layer$$anonymous$$ask.value);

         foreach (Collider c in colliders) {
             //get the ExploderClass script attached to the 
             //other collider, if any
             ExploderClass exploder = c.GetComponent<ExploderClass>();

             //call the other exploder's Explode() method to get
             //called after ExplosionDelay seconds. (Note: if
             //no ExploderClass script was found on c's
             //GameObject, this if statement doesn't run)
             if (exploder) exploder.Invoke("Explode",ExplosionDelay);
         }

         //Destroy this GameObject so it doesn't get re-exploded
         //by another exploder
         Destroy(gameObject);
     }
 }

Edit: fixed code formatting, added some more variables and using statements as needed, replaced SphereCastAll() with OverlapSphere()

hey @nesis thanks for the help but your script has errors , can u please test it =( ?

hey @nesis thanks a lot for editing the script , but where should i add this script , i added it to an object with a sphere collider , when i destroy the object , well nothing else that was inside the sphere gets destroyed , nothing was destroyed , thanks hope you'll reply ASAP

hey @kyrnal thanks for the reply , tell me please , how can i use this script to destroy all the object tagged as "TNT" that are located inside this 100 meters ? thanks !

 function Update () {
         var hit : RaycastHit;
         if (Physics.Raycast (transform.position, -Vector3.up, hit, 100.0)) {
             var distanceToGround = hit.distance;
         }
     }

 // Note : the Integer "10" in the Physics.SphereCastAll line refers to the int value of the TNT layer.
 function Update () {
 
        var hit : RaycastHit;
        var hitColliders : Collider[];
 
        hitColliders = Physics.SphereCastAll (transform.position, 100.0, hit, 10);
 
        for (var objCollider : Collider in hitColliders) {
          objCollider.root.gameObject.SetActive(false);
        }
     }
     

I didn't test that, so it might error. But it could point you in the right direction, perhaps?

$$anonymous$$ister$$anonymous$$ike had the right idea with SphereCastAll

hey @$$anonymous$$yrnal thanks for the help but nop didn't work :/ it has an error : No appropriate version of 'UnityEngine.Physics.SphereCastAll' for the argument list '(UnityEngine.Vector3, float, UnityEngine.RaycastHit, int)' was found.