[Kaimetsu]

Would be nicer if there were fewer trigonometry calls, but I guess rotation matrices are a little demanding for most people.

I've always liked working clocks in games. It's attention to detail, y'know? I like windows that can be opened, I like lamps that can be operated, I like barrels in which the player can hide. It all adds to the immersive nature of the world, and promotes emergent gameplay.