-! (c)2009 Joe Groff, Doug Coleman. bsd license
+! Copyright (C) 2009 Joe Groff, Doug Coleman.
+! See http://factorcode.org/license.txt for BSD license.
USING: accessors arrays combinators game.input game.loop
game.input.scancodes grouping kernel literals locals
math math.constants math.functions math.order math.trig