Instantiated object that has a collision is not firing OnCollisionEnter2D

Questions & Answers
1

I have objects: a wall and a player that shoots “something”.

Both are prefabs and are loaded dynamically like this:

Transform bulletClone = GameObject.Instantiate (shootTile, playerPos, Quaternion.identity) as Transform;

Instantiate (Wall, new Vector3 (x, y), Quaternion.identity);

They actually collide, but they do not trigger my following function:

void OnCollisionEnter2D(Collision2D collision)
	{
		Debug.Log (collision.gameObject.tag);
		if(collision.gameObject.name == "enemy"){
			Destroy(this.gameObject);
		}
	}

I have a rigidBody2D on the bullet, with a Box Collider 2d.
On the wall I also have Box Collider 2D.

My player has both a ridigBody2D and a BoxCollider2D, and that is triggering on the bullet AND the wall. But for some reason it is not triggering for my instantiated objects :confused:

2

You’re testing for a collision only with an object named “enemy”, but I don’t see you assign that name to the instantiated object anywhere. So you need something like:

Transform bulletClone = GameObject.Instantiate (shootTile, playerPos, Quaternion.identity) as Transform;
bulletClone.name = "enemy";

Either that, or test for collisions based on the tag of the object, which the instantiated object will inherit from its prefab.