Roo.lib.Easing = {
easeNone: function (t, b, c, d) {
return c * t / d + b;
},
easeIn: function (t, b, c, d) {
return c * (t /= d) * t + b;
},
easeOut: function (t, b, c, d) {
return -c * (t /= d) * (t - 2) + b;
},
easeBoth: function (t, b, c, d) {
if ((t /= d / 2) < 1) {
return c / 2 * t * t + b;
}
return -c / 2 * ((--t) * (t - 2) - 1) + b;
},
easeInStrong: function (t, b, c, d) {
return c * (t /= d) * t * t * t + b;
},
easeOutStrong: function (t, b, c, d) {
return -c * ((t = t / d - 1) * t * t * t - 1) + b;
},
easeBothStrong: function (t, b, c, d) {
if ((t /= d / 2) < 1) {
return c / 2 * t * t * t * t + b;
}
return -c / 2 * ((t -= 2) * t * t * t - 2) + b;
},
elasticIn: function (t, b, c, d, a, p) {
if (t == 0) {
return b;
}
if ((t /= d) == 1) {
return b + c;
}
if (!p) {
p = d * .3;
}
if (!a || a < Math.abs(c)) {
a = c;
var s = p / 4;
}
else {
var s = p / (2 * Math.PI) * Math.asin(c / a);
}
return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
},
elasticOut: function (t, b, c, d, a, p) {
if (t == 0) {
return b;
}
if ((t /= d) == 1) {
return b + c;
}
if (!p) {
p = d * .3;
}
if (!a || a < Math.abs(c)) {
a = c;
var s = p / 4;
}
else {
var s = p / (2 * Math.PI) * Math.asin(c / a);
}
return a * Math.pow(2, -10 * t) * Math.sin((t * d - s) * (2 * Math.PI) / p) + c + b;
},
elasticBoth: function (t, b, c, d, a, p) {
if (t == 0) {
return b;
}
if ((t /= d / 2) == 2) {
return b + c;
}
if (!p) {
p = d * (.3 * 1.5);
}
if (!a || a < Math.abs(c)) {
a = c;
var s = p / 4;
}
else {
var s = p / (2 * Math.PI) * Math.asin(c / a);
}
if (t < 1) {
return -.5 * (a * Math.pow(2, 10 * (t -= 1)) *
Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
}
return a * Math.pow(2, -10 * (t -= 1)) *
Math.sin((t * d - s) * (2 * Math.PI) / p) * .5 + c + b;
},
backIn: function (t, b, c, d, s) {
if (typeof s == 'undefined') {
s = 1.70158;
}
return c * (t /= d) * t * ((s + 1) * t - s) + b;
},
backOut: function (t, b, c, d, s) {
if (typeof s == 'undefined') {
s = 1.70158;
}
return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
},
backBoth: function (t, b, c, d, s) {
if (typeof s == 'undefined') {
s = 1.70158;
}
if ((t /= d / 2 ) < 1) {
return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b;
}
return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b;
},
bounceIn: function (t, b, c, d) {
return c - Roo.lib.Easing.bounceOut(d - t, 0, c, d) + b;
},
bounceOut: function (t, b, c, d) {
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;
}
return c * (7.5625 * (t -= (2.625 / 2.75)) * t + .984375) + b;
},
bounceBoth: function (t, b, c, d) {
if (t < d / 2) {
return Roo.lib.Easing.bounceIn(t * 2, 0, c, d) * .5 + b;
}
return Roo.lib.Easing.bounceOut(t * 2 - d, 0, c, d) * .5 + c * .5 + b;
}
};