HaxeFlixel/flixel — pull request #695 by kevinresol (2013-11-12 05:00:37+00:00)
Title: Added distanceWithin() functions to FlxMath

A very common and simple way to avoid calling the expensive Math.sqrt() function, because we seldom really need to know the distance in numbers, we usually only want to know if the distance is within a range.