File: /var/www/design.system/node_modules/tween-functions/index.js
'use strict';
// t: current time, b: beginning value, _c: final value, d: total duration
var tweenFunctions = {
linear: function(t, b, _c, d) {
var c = _c - b;
return c * t / d + b;
},
easeInQuad: function(t, b, _c, d) {
var c = _c - b;
return c * (t /= d) * t + b;
},
easeOutQuad: function(t, b, _c, d) {
var c = _c - b;
return -c * (t /= d) * (t - 2) + b;
},
easeInOutQuad: function(t, b, _c, d) {
var c = _c - b;
if ((t /= d / 2) < 1) {
return c / 2 * t * t + b;
} else {
return -c / 2 * ((--t) * (t - 2) - 1) + b;
}
},
easeInCubic: function(t, b, _c, d) {
var c = _c - b;
return c * (t /= d) * t * t + b;
},
easeOutCubic: function(t, b, _c, d) {
var c = _c - b;
return c * ((t = t / d - 1) * t * t + 1) + b;
},
easeInOutCubic: function(t, b, _c, d) {
var c = _c - b;
if ((t /= d / 2) < 1) {
return c / 2 * t * t * t + b;
} else {
return c / 2 * ((t -= 2) * t * t + 2) + b;
}
},
easeInQuart: function(t, b, _c, d) {
var c = _c - b;
return c * (t /= d) * t * t * t + b;
},
easeOutQuart: function(t, b, _c, d) {
var c = _c - b;
return -c * ((t = t / d - 1) * t * t * t - 1) + b;
},
easeInOutQuart: function(t, b, _c, d) {
var c = _c - b;
if ((t /= d / 2) < 1) {
return c / 2 * t * t * t * t + b;
} else {
return -c / 2 * ((t -= 2) * t * t * t - 2) + b;
}
},
easeInQuint: function(t, b, _c, d) {
var c = _c - b;
return c * (t /= d) * t * t * t * t + b;
},
easeOutQuint: function(t, b, _c, d) {
var c = _c - b;
return c * ((t = t / d - 1) * t * t * t * t + 1) + b;
},
easeInOutQuint: function(t, b, _c, d) {
var c = _c - b;
if ((t /= d / 2) < 1) {
return c / 2 * t * t * t * t * t + b;
} else {
return c / 2 * ((t -= 2) * t * t * t * t + 2) + b;
}
},
easeInSine: function(t, b, _c, d) {
var c = _c - b;
return -c * Math.cos(t / d * (Math.PI / 2)) + c + b;
},
easeOutSine: function(t, b, _c, d) {
var c = _c - b;
return c * Math.sin(t / d * (Math.PI / 2)) + b;
},
easeInOutSine: function(t, b, _c, d) {
var c = _c - b;
return -c / 2 * (Math.cos(Math.PI * t / d) - 1) + b;
},
easeInExpo: function(t, b, _c, d) {
var c = _c - b;
return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
},
easeOutExpo: function(t, b, _c, d) {
var c = _c - b;
return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
},
easeInOutExpo: function(t, b, _c, d) {
var c = _c - b;
if (t === 0) {
return b;
}
if (t === d) {
return b + c;
}
if ((t /= d / 2) < 1) {
return c / 2 * Math.pow(2, 10 * (t - 1)) + b;
} else {
return c / 2 * (-Math.pow(2, -10 * --t) + 2) + b;
}
},
easeInCirc: function(t, b, _c, d) {
var c = _c - b;
return -c * (Math.sqrt(1 - (t /= d) * t) - 1) + b;
},
easeOutCirc: function(t, b, _c, d) {
var c = _c - b;
return c * Math.sqrt(1 - (t = t / d - 1) * t) + b;
},
easeInOutCirc: function(t, b, _c, d) {
var c = _c - b;
if ((t /= d / 2) < 1) {
return -c / 2 * (Math.sqrt(1 - t * t) - 1) + b;
} else {
return c / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1) + b;
}
},
easeInElastic: function(t, b, _c, d) {
var c = _c - b;
var a, p, s;
s = 1.70158;
p = 0;
a = c;
if (t === 0) {
return b;
} else if ((t /= d) === 1) {
return b + c;
}
if (!p) {
p = d * 0.3;
}
if (a < Math.abs(c)) {
a = c;
s = p / 4;
} else {
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;
},
easeOutElastic: function(t, b, _c, d) {
var c = _c - b;
var a, p, s;
s = 1.70158;
p = 0;
a = c;
if (t === 0) {
return b;
} else if ((t /= d) === 1) {
return b + c;
}
if (!p) {
p = d * 0.3;
}
if (a < Math.abs(c)) {
a = c;
s = p / 4;
} else {
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;
},
easeInOutElastic: function(t, b, _c, d) {
var c = _c - b;
var a, p, s;
s = 1.70158;
p = 0;
a = c;
if (t === 0) {
return b;
} else if ((t /= d / 2) === 2) {
return b + c;
}
if (!p) {
p = d * (0.3 * 1.5);
}
if (a < Math.abs(c)) {
a = c;
s = p / 4;
} else {
s = p / (2 * Math.PI) * Math.asin(c / a);
}
if (t < 1) {
return -0.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
} else {
return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p) * 0.5 + c + b;
}
},
easeInBack: function(t, b, _c, d, s) {
var c = _c - b;
if (s === void 0) {
s = 1.70158;
}
return c * (t /= d) * t * ((s + 1) * t - s) + b;
},
easeOutBack: function(t, b, _c, d, s) {
var c = _c - b;
if (s === void 0) {
s = 1.70158;
}
return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
},
easeInOutBack: function(t, b, _c, d, s) {
var c = _c - b;
if (s === void 0) {
s = 1.70158;
}
if ((t /= d / 2) < 1) {
return c / 2 * (t * t * (((s *= 1.525) + 1) * t - s)) + b;
} else {
return c / 2 * ((t -= 2) * t * (((s *= 1.525) + 1) * t + s) + 2) + b;
}
},
easeInBounce: function(t, b, _c, d) {
var c = _c - b;
var v;
v = tweenFunctions.easeOutBounce(d - t, 0, c, d);
return c - v + b;
},
easeOutBounce: function(t, b, _c, d) {
var c = _c - b;
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 + 0.75) + b;
} else if (t < 2.5 / 2.75) {
return c * (7.5625 * (t -= 2.25 / 2.75) * t + 0.9375) + b;
} else {
return c * (7.5625 * (t -= 2.625 / 2.75) * t + 0.984375) + b;
}
},
easeInOutBounce: function(t, b, _c, d) {
var c = _c - b;
var v;
if (t < d / 2) {
v = tweenFunctions.easeInBounce(t * 2, 0, c, d);
return v * 0.5 + b;
} else {
v = tweenFunctions.easeOutBounce(t * 2 - d, 0, c, d);
return v * 0.5 + c * 0.5 + b;
}
}
};
module.exports = tweenFunctions;