package com.greensock.easing { public class Quart { public static const power:uint = 3; public static function easeIn (t:Number, b:Number, c:Number, d:Number):Number { return c*(t/=d)*t*t*t + b; } public static function easeOut (t:Number, b:Number, c:Number, d:Number):Number { return -c * ((t=t/d-1)*t*t*t - 1) + b; } public static function easeInOut (t:Number, b:Number, c:Number, d:Number):Number { if ((t/=d*0.5) < 1) return c*0.5*t*t*t*t + b; return -c*0.5 * ((t-=2)*t*t*t - 2) + b; } } }