package gs.easing { public class Bounce { public static function easeOut (t:Number, b:Number, c:Number, d:Number):Number { if ((t/=d) < (1/2.75)) { return c*(7.5625*t*t) + b; } else if (t < (2/2.75)) { return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b; } else if (t < (2.5/2.75)) { return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b; } else { return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b; } } public static function easeIn (t:Number, b:Number, c:Number, d:Number):Number { return c - easeOut(d-t, 0, c, d) + b; } public static function easeInOut (t:Number, b:Number, c:Number, d:Number):Number { if (t < d/2) return easeIn (t*2, 0, c, d) * .5 + b; else return easeOut (t*2-d, 0, c, d) * .5 + c*.5 + b; } } }