question about colliders and triggers

Unity Engine
1

Hi,

I’m just investigating the use of triggers in my game. But I’m a stumped at what’s happening.

  • I’ve got object A with a rigid body component

  • I’ve got object B with a box collider component, with isTrigger ticked in the inspector.

From my understanding of triggers, when object A hit object B, Trigger events get fired.

I’ve added the following scripts to object B.
function OnTriggerEnter (col : Collider)
{
print (“on trigger enter”);
}

and similar for OnTriggerStay, OnTriggerExit, and OnCollisionEnter.

The print message is never displayed, so nothing is firing. However, when I move Object A over Object B, it stops dead - as if it’s hit something - so they must be interacting somehow.

the rigidbody has use gravity = false, and is kinematic = no (though I’ve tried each combination).

is there anything obvious I’m missing?

2

Object A needs a collider as well.

3

brilliant, thanks very much. I thought the rigidbody was what collided with object B, but that clears it up for me.

thanks a lot!