package gs.easing {
    public class Cubic {
        public static function easeIn (t:Number, b:Number, c:Number, d:Number):Number {
            return c*(t/=d)*t*t + b;
        }
        public static function easeOut (t:Number, b:Number, c:Number, d:Number):Number {
            return c*((t=t/d-1)*t*t + 1) + b;
        }
        public static function easeInOut (t:Number, b:Number, c:Number, d:Number):Number {
            if ((t/=d/2) < 1) return c/2*t*t*t + b;
            return c/2*((t-=2)*t*t + 2) + b;
        }
    }
}