Collision detection on 2 object with colliders.

Questions & Answers
1

I have 2 gameObjects and both have colliders. Is it possible to detect collision without making it rigid body?

In the documentation it says “OnCollisionEnter is called when this collider/rigidbody has begun touching another rigidbody/collider”

But when i try this function without making the gameObject a rigid body it doesn’t run.

function OnCollisionEnter(collision : Collision) {
		print(collision.gameObject);
}
2

Unity is weird in this. If neither object has a rigidbody it’s not guaranteed to work. So if you absolutely can’t use a rigidbody, you’re going to have to create your own detection function.

There’s a pretty lengthy discussion here: Collision checking without the need of a rigidbody.