the 'rotation' is usually expressed in degrees (360°) or as points on a goniometric circumference, derived from sin\cos of the angle (0 = (0, 1), 90 = (1, 0), etc)
In this bot, it's expressed in radiants (0 = 6.28 is north, 3.14 is south) when you call UseItem and things like that, but in a...