Located here

Pretty good, for a day, I think! The source itself is very sloppy, I tried to make it as best I could as fast as possible (which explains why I was still polishing it and fixing bugs past my bedtime!). I'm also pretty bad at trig, so this is a win for me.

Libraries etc. used in it:

Lummox JR's arctan() proc
K_KeyHandling (Kakashi2412's custom macro library; I suggest using it for fast paced games (that means you, Kajika!)).