[SOLVED] Can't raycast and hit triggers without having a rigidbody

Unity Engine
1

Hey guys, having trouble with Raycasting. On my custom (non-physics) character controller I use trigger colliders to stick to the floor. I had a trigger box collider and kinematic Rigidbody on each floor collider, but I’ve been going through and cleaning up old code/objects (now that I’m older and wiser :)) and saw I didn’t actually need the RB for the trigger collider. (At least, that’s my current understanding.) So I removed the RB from my floor colliders. Now, my character falls through the floor. After realizing I needed to specify to the Raycast to hit triggers, I changed to the call which specifies trigger interaction and my new Raycast call looks like this:

bool wasCollision = Physics.Raycast(transform.position, (-transform.up) + desiredMove, out downhitInfo, 20f, int.MaxValue, QueryTriggerInteraction.Collide);

I’m still not hitting my trigger colliders, and if I put a kinematic RB on them, I do. What’s up?

An example of my floor collider:
2328390--157206--upload_2015-10-6_23-58-22.png

2

I can’t count the times people have argued that and told me it wasn’t possible.
The docs even say a rigidbody or a character controller

3

Unity - Scripting API: Collider.OnTriggerEnter(Collider) Description

Yes you need a rigidbody

4

at least one thing involved in the collision needs to have a rigidbody, if neither do the physics engine doesn’t know about them, so how is it supposed to say “hey a collision happened”…?

5

Ahh, I obviously thought triggers completely removed the need for RBs. Must have stopped reading after the second sentence in that ref page, and missed the third sentence :). Thanks! I was so confused!