00001 class tweens.robertpenner.easing.Circ {
00002 static function easeIn (t:Number, b:Number, c:Number, d:Number):Number {
00003 return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;
00004 }
00005 static function easeOut (t:Number, b:Number, c:Number, d:Number):Number {
00006 return c * Math.sqrt(1 - (t=t/d-1)*t) + b;
00007 }
00008 static function easeInOut (t:Number, b:Number, c:Number, d:Number):Number {
00009 if ((t/=d/2) < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b;
00010 return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b;
00011 }
00012 static function easeOutIn (t:Number, b:Number, c:Number, d:Number):Number {
00013 if ((t/=d/2) < 1) return c/2 * Math.sqrt(1 - --t*t) + b;
00014 return c/2 * (2-Math.sqrt(1 - --t*t) ) + b;
00015 }
00016 }
1.5.2