I have a "laser door" which height is = to the distance from it's top point (origin) to the first obstacle it finds on its way down, no matter if it's the floor or a box (the two objects I have in mind right now).
I want to be able to stop the laser with a box. Otherwise, it must hit the ground, no matter how much distance there is between the objects.
I'm kind lost here. Thanks for any help you can give me.