Is there an easy way to make a RigidBody2D collide with only one other RigidBody2D?

Question

I need to make a RigidBody2D collide with only one other RigidBody2D and ignore collisions with every other RigidBody2D.

Only way I can think is to call Physics2D.IgnoreCollision() for every other collider. Not exactly an elegant solution.

Answer 1

Answer by rettichmann · Dec 21, 2016 at 11:09 AM

You could try to tag both objects and ask if they collided or not.

 void OnCollisionEnter (Collision col)
     {
         if(col.gameObject.tag == "mySpecialRigidBody2D")
         {
             // Do something.
         }
     }

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Is there an easy way to make a RigidBody2D collide with only one other RigidBody2D?

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