Need some help about collision detection

Hello.

I'm trying to make my hero hit with his sword, but I had no luck with it so far. I've been using a body but i don't want it to react to forces when it collides, I just want to know when a collision ocurred and then do something about it.

Off the top of my head you could use an intersection, which is like a 3D ray cast, it reports back all bodies within a certain area.

Sounds good

Is there any documentation about those intersections?