Hai!
I'm trying to use the thing said above.
But it doesnt work since it never returns true 
The way I get spatial is like this:
wheels.getChild(1)
where the wheels is a DynamicPhysicsNode and I have attached a cylinder too it to make it visible.
and the getChild(1) returns Cylinder (which is the none physic cylinder, I'v checked)
But still, it doesnt returns true, even when it hits the ground
The ground is a imported .obj file.
Why?