How to check Collision detection for GameObjects of same prefab (Unity)

Question

(For 2D Project) I created a gameObject and made it a prefab. Now when the game starts, the prefab is used to instantiate gameObjects and they all should check if they collide with one another.

I tried other unity's collision methods but it didn't work. They either kept colliding with themselves (their own rigidbody) or it didn't work at all.

I'm new to unity and learning things. I searched every where but didn't get my question solved. I'll appreciate any help, Thank you!

Prefab is loaded and Instantiated as such..

GameObject tile = Instantiate(Resources.Load("Prefabs/Tile") as GameObject); 

Its a basic gameObject having SpriteRenderer 2D.

I used Box Collider 2D and Rigidbody 2D components on that prefab - Inspector

A simple script which has OnTriggerEnter2D(Collider2D other) function to check if it collides..

using UnityEngine;  
  
public class TileCollider : MonoBehaviour {  
  
    public Rigidbody2D triggerBody;  

    void OnTriggerEnter2D(Collider2D other) {  
        if (triggerBody == null)  
            return;  
        if (other.attachedRigidbody == triggerBody) {  
            Debug.Log("Collision!");  
        }  
    }  
  
}  

I tried it without any if statements - It triggers collision for the Rigidbody2D of the gameObject (itself)

I passed the Prefab itself to check the collision for - Script in Inspector. This is where were things get bad. It looks for the rigidbody of its own gameObject but I wanted it to search for other cloned gameObjects from same prefab.

Answer 1

The first thing to look at to solve the problem is to check if your prefabs have tags attached to them.