How to instantiate prefab when colliding with specified prefab

Question

Hello, so I want this script to instantiate a prefab when colliding with a specified prefab. Right now my script is spawning the prefab whenever the object is colliding with anything:

using System.Collections; using System.Collections.Generic; using UnityEngine;

 public class explosion : MonoBehaviour
 {
     public GameObject explosionPrefab;
     public float      explodeSecs = -1;

     void OnCollisionEnter( Collision collision ) 
     {
         // Rotate the object so that the y-axis faces along the normal of the surface
         ContactPoint contact = collision.contacts[0];
         Quaternion   rot     = Quaternion.FromToRotation(Vector3.up, contact.normal);
         Vector3      pos     = contact.point;
         Instantiate(explosionPrefab, pos, rot);
         // Destroy the projectile
         
     }
 }

I can't figure it out how to edit the script, so I can specify in the inspector at which object-collision the script should spawn my prefab. Thanks for help in advance :)

Answer 1

Answer by xxmariofer · Jun 26, 2020 at 01:59 PM

the simplest solution is to add in the inspector a tag to the gameobjects you want them to collide and instantiate the explosion and inside the collision enter check the tag

 void OnCollisionEnter( Collision collision ) 
      {
           if(collision.gameObject.tag != "TheCollisionTag")
                return;
 
          // Rotate the object so that the y-axis faces along the normal of the surface
          ContactPoint contact = collision.contacts[0];
          Quaternion   rot     = Quaternion.FromToRotation(Vector3.up, contact.normal);
          Vector3      pos     = contact.point;
          Instantiate(explosionPrefab, pos, rot);
          // Destroy the projectile
          
      }

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jacobrutter · Apr 01 at 07:59 PM 0

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Very useful thanks for sharing.

How to instantiate prefab when colliding with specified prefab

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