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/**
* Tween.js - Licensed under the MIT license
* https://github.com/tweenjs/tween.js
* ----------------------------------------------
*
* See https://github.com/tweenjs/tween.js/graphs/contributors for the full
list of contributors.
* Thank you all, you're awesome!
*/
var TWEEN = TWEEN || (function () {
var _tweens = {};
var _tweensAddedDuringUpdate = {};
var _nextId = 0;
return {
getAll: function () {
return Object.keys(_tweens).map(function (tweenId) {
return _tweens[tweenId];
});
},
removeAll: function () {
_tweens = {};
},
add: function (tween) {
_tweens[tween.getId()] = tween;
_tweensAddedDuringUpdate[tween.getId()] = tween;
},
remove: function (tween) {
delete _tweens[tween.getId()];
delete _tweensAddedDuringUpdate[tween.getId()];
},
update: function (time, preserve) {
var tweenIds = Object.keys(_tweens);
if (tweenIds.length === 0) {
return false;
}
time = time !== undefined ? time : TWEEN.now();
// Tweens are updated in "batches". If you add a new tween
during an update, then the
// new tween will be updated in the next batch.
// If you remove a tween during an update, it will normally still be
updated. However,
// if the removed tween was added during the current batch, then it will
not be updated.
while (tweenIds.length > 0) {
_tweensAddedDuringUpdate = {};
for (var i = 0; i < tweenIds.length; i++) {
if (_tweens[tweenIds[i]].update(time) === false && !preserve)
{
delete _tweens[tweenIds[i]];
}
}
tweenIds = Object.keys(_tweensAddedDuringUpdate);
}
return true;
},
nextId: function () {
return _nextId++;
}
};
})();
// Include a performance.now polyfill.
// In node.js, use process.hrtime.
if (typeof (window) === 'undefined' && typeof (process)
!== 'undefined') {
TWEEN.now = function () {
var time = process.hrtime();
// Convert [seconds, nanoseconds] to milliseconds.
return time[0] * 1000 + time[1] / 1000000;
};
}
// In a browser, use window.performance.now if it is available.
else if (typeof (window) !== 'undefined' &&
window.performance !== undefined &&
window.performance.now !== undefined) {
// This must be bound, because directly assigning this function
// leads to an invocation exception in Chrome.
TWEEN.now = window.performance.now.bind(window.performance);
}
// Use Date.now if it is available.
else if (Date.now !== undefined) {
TWEEN.now = Date.now;
}
// Otherwise, use 'new Date().getTime()'.
else {
TWEEN.now = function () {
return new Date().getTime();
};
}
function assign(target, source) {
var keys = Object.keys(source);
var length = keys.length;
for (var i = 0; i < length; i += 1) {
target[keys[i]] = source[keys[i]];
}
return target;
}
TWEEN.Tween = function (object) {
this._object = object;
this._valuesStart = {};
this._valuesEnd = {};
this._valuesStartRepeat = {};
this._duration = 1000;
this._repeat = 0;
this._repeatDelayTime = undefined;
this._yoyo = false;
this._isPlaying = false;
this._reversed = false;
this._delayTime = 0;
this._startTime = null;
this._easingFunction = TWEEN.Easing.Linear.None;
this._interpolationFunction = TWEEN.Interpolation.Linear;
this._chainedTweens = [];
this._onStartCallback = null;
this._onStartCallbackFired = false;
this._onUpdateCallback = null;
this._onCompleteCallback = null;
this._onStopCallback = null;
this._id = TWEEN.nextId();
};
TWEEN.Tween.prototype = assign(Object.create(Object.prototype), {
getId: function getId() {
return this._id;
},
to: function to(properties, duration) {
this._valuesEnd = properties;
if (duration !== undefined) {
this._duration = duration;
}
return this;
},
start: function start(time) {
TWEEN.add(this);
this._isPlaying = true;
this._onStartCallbackFired = false;
this._startTime = time !== undefined ? time : TWEEN.now();
this._startTime += this._delayTime;
for (var property in this._valuesEnd) {
// Check if an Array was provided as property value
if (this._valuesEnd[property] instanceof Array) {
if (this._valuesEnd[property].length === 0) {
continue;
}
// Create a local copy of the Array with the start value at the front
this._valuesEnd[property] =
[this._object[property]].concat(this._valuesEnd[property]);
}
// If `to()` specifies a property that doesn't exist in the source
object,
// we should not set that property in the object
if (this._object[property] === undefined) {
continue;
}
// Save the starting value.
this._valuesStart[property] = this._object[property];
if ((this._valuesStart[property] instanceof Array) === false) {
this._valuesStart[property] *= 1.0; // Ensures we're using
numbers, not strings
}
this._valuesStartRepeat[property] = this._valuesStart[property] || 0;
}
return this;
},
stop: function stop() {
if (!this._isPlaying) {
return this;
}
TWEEN.remove(this);
this._isPlaying = false;
if (this._onStopCallback !== null) {
this._onStopCallback.call(this._object, this._object);
}
this.stopChainedTweens();
return this;
},
end: function end() {
this.update(this._startTime + this._duration);
return this;
},
stopChainedTweens: function stopChainedTweens() {
for (var i = 0, numChainedTweens = this._chainedTweens.length; i <
numChainedTweens; i++) {
this._chainedTweens[i].stop();
}
},
delay: function delay(amount) {
this._delayTime = amount;
return this;
},
repeat: function repeat(times) {
this._repeat = times;
return this;
},
repeatDelay: function repeatDelay(amount) {
this._repeatDelayTime = amount;
return this;
},
yoyo: function yoyo(yoyo) {
this._yoyo = yoyo;
return this;
},
easing: function easing(easing) {
this._easingFunction = easing;
return this;
},
interpolation: function interpolation(interpolation) {
this._interpolationFunction = interpolation;
return this;
},
chain: function chain() {
this._chainedTweens = arguments;
return this;
},
onStart: function onStart(callback) {
this._onStartCallback = callback;
return this;
},
onUpdate: function onUpdate(callback) {
this._onUpdateCallback = callback;
return this;
},
onComplete: function onComplete(callback) {
this._onCompleteCallback = callback;
return this;
},
onStop: function onStop(callback) {
this._onStopCallback = callback;
return this;
},
update: function update(time) {
var property;
var elapsed;
var value;
if (time < this._startTime) {
return true;
}
if (this._onStartCallbackFired === false) {
if (this._onStartCallback !== null) {
this._onStartCallback.call(this._object, this._object);
}
this._onStartCallbackFired = true;
}
elapsed = (time - this._startTime) / this._duration;
elapsed = elapsed > 1 ? 1 : elapsed;
value = this._easingFunction(elapsed);
for (property in this._valuesEnd) {
// Don't update properties that do not exist in the source object
if (this._valuesStart[property] === undefined) {
continue;
}
var start = this._valuesStart[property] || 0;
var end = this._valuesEnd[property];
if (end instanceof Array) {
this._object[property] = this._interpolationFunction(end, value);
} else {
// Parses relative end values with start as base (e.g.: +10, -3)
if (typeof (end) === 'string') {
if (end.charAt(0) === '+' || end.charAt(0) ===
'-') {
end = start + parseFloat(end);
} else {
end = parseFloat(end);
}
}
// Protect against non numeric properties.
if (typeof (end) === 'number') {
this._object[property] = start + (end - start) * value;
}
}
}
if (this._onUpdateCallback !== null) {
this._onUpdateCallback.call(this._object, value);
}
if (elapsed === 1) {
if (this._repeat > 0) {
if (isFinite(this._repeat)) {
this._repeat--;
}
// Reassign starting values, restart by making startTime = now
for (property in this._valuesStartRepeat) {
if (typeof (this._valuesEnd[property]) === 'string') {
this._valuesStartRepeat[property] = this._valuesStartRepeat[property]
+ parseFloat(this._valuesEnd[property]);
}
if (this._yoyo) {
var tmp = this._valuesStartRepeat[property];
this._valuesStartRepeat[property] = this._valuesEnd[property];
this._valuesEnd[property] = tmp;
}
this._valuesStart[property] = this._valuesStartRepeat[property];
}
if (this._yoyo) {
this._reversed = !this._reversed;
}
if (this._repeatDelayTime !== undefined) {
this._startTime = time + this._repeatDelayTime;
} else {
this._startTime = time + this._delayTime;
}
return true;
} else {
if (this._onCompleteCallback !== null) {
this._onCompleteCallback.call(this._object, this._object);
}
for (var i = 0, numChainedTweens = this._chainedTweens.length; i <
numChainedTweens; i++) {
// Make the chained tweens start exactly at the time they should,
// even if the `update()` method was called way past the duration of
the tween
this._chainedTweens[i].start(this._startTime + this._duration);
}
return false;
}
}
return true;
}
});
TWEEN.Easing = {
Linear: {
None: function (k) {
return k;
}
},
Quadratic: {
In: function (k) {
return k * k;
},
Out: function (k) {
return k * (2 - k);
},
InOut: function (k) {
if ((k *= 2) < 1) {
return 0.5 * k * k;
}
return - 0.5 * (--k * (k - 2) - 1);
}
},
Cubic: {
In: function (k) {
return k * k * k;
},
Out: function (k) {
return --k * k * k + 1;
},
InOut: function (k) {
if ((k *= 2) < 1) {
return 0.5 * k * k * k;
}
return 0.5 * ((k -= 2) * k * k + 2);
}
},
Quartic: {
In: function (k) {
return k * k * k * k;
},
Out: function (k) {
return 1 - (--k * k * k * k);
},
InOut: function (k) {
if ((k *= 2) < 1) {
return 0.5 * k * k * k * k;
}
return - 0.5 * ((k -= 2) * k * k * k - 2);
}
},
Quintic: {
In: function (k) {
return k * k * k * k * k;
},
Out: function (k) {
return --k * k * k * k * k + 1;
},
InOut: function (k) {
if ((k *= 2) < 1) {
return 0.5 * k * k * k * k * k;
}
return 0.5 * ((k -= 2) * k * k * k * k + 2);
}
},
Sinusoidal: {
In: function (k) {
return 1 - Math.cos(k * Math.PI / 2);
},
Out: function (k) {
return Math.sin(k * Math.PI / 2);
},
InOut: function (k) {
return 0.5 * (1 - Math.cos(Math.PI * k));
}
},
Exponential: {
In: function (k) {
return k === 0 ? 0 : Math.pow(1024, k - 1);
},
Out: function (k) {
return k === 1 ? 1 : 1 - Math.pow(2, - 10 * k);
},
InOut: function (k) {
if (k === 0) {
return 0;
}
if (k === 1) {
return 1;
}
if ((k *= 2) < 1) {
return 0.5 * Math.pow(1024, k - 1);
}
return 0.5 * (- Math.pow(2, - 10 * (k - 1)) + 2);
}
},
Circular: {
In: function (k) {
return 1 - Math.sqrt(1 - k * k);
},
Out: function (k) {
return Math.sqrt(1 - (--k * k));
},
InOut: function (k) {
if ((k *= 2) < 1) {
return - 0.5 * (Math.sqrt(1 - k * k) - 1);
}
return 0.5 * (Math.sqrt(1 - (k -= 2) * k) + 1);
}
},
Elastic: {
In: function (k) {
if (k === 0) {
return 0;
}
if (k === 1) {
return 1;
}
return -Math.pow(2, 10 * (k - 1)) * Math.sin((k - 1.1) * 5 * Math.PI);
},
Out: function (k) {
if (k === 0) {
return 0;
}
if (k === 1) {
return 1;
}
return Math.pow(2, -10 * k) * Math.sin((k - 0.1) * 5 * Math.PI) + 1;
},
InOut: function (k) {
if (k === 0) {
return 0;
}
if (k === 1) {
return 1;
}
k *= 2;
if (k < 1) {
return -0.5 * Math.pow(2, 10 * (k - 1)) * Math.sin((k - 1.1) * 5 *
Math.PI);
}
return 0.5 * Math.pow(2, -10 * (k - 1)) * Math.sin((k - 1.1) * 5 *
Math.PI) + 1;
}
},
Back: {
In: function (k) {
var s = 1.70158;
return k * k * ((s + 1) * k - s);
},
Out: function (k) {
var s = 1.70158;
return --k * k * ((s + 1) * k + s) + 1;
},
InOut: function (k) {
var s = 1.70158 * 1.525;
if ((k *= 2) < 1) {
return 0.5 * (k * k * ((s + 1) * k - s));
}
return 0.5 * ((k -= 2) * k * ((s + 1) * k + s) + 2);
}
},
Bounce: {
In: function (k) {
return 1 - TWEEN.Easing.Bounce.Out(1 - k);
},
Out: function (k) {
if (k < (1 / 2.75)) {
return 7.5625 * k * k;
} else if (k < (2 / 2.75)) {
return 7.5625 * (k -= (1.5 / 2.75)) * k + 0.75;
} else if (k < (2.5 / 2.75)) {
return 7.5625 * (k -= (2.25 / 2.75)) * k + 0.9375;
} else {
return 7.5625 * (k -= (2.625 / 2.75)) * k + 0.984375;
}
},
InOut: function (k) {
if (k < 0.5) {
return TWEEN.Easing.Bounce.In(k * 2) * 0.5;
}
return TWEEN.Easing.Bounce.Out(k * 2 - 1) * 0.5 + 0.5;
}
}
};
TWEEN.Interpolation = {
Linear: function (v, k) {
var m = v.length - 1;
var f = m * k;
var i = Math.floor(f);
var fn = TWEEN.Interpolation.Utils.Linear;
if (k < 0) {
return fn(v[0], v[1], f);
}
if (k > 1) {
return fn(v[m], v[m - 1], m - f);
}
return fn(v[i], v[i + 1 > m ? m : i + 1], f - i);
},
Bezier: function (v, k) {
var b = 0;
var n = v.length - 1;
var pw = Math.pow;
var bn = TWEEN.Interpolation.Utils.Bernstein;
for (var i = 0; i <= n; i++) {
b += pw(1 - k, n - i) * pw(k, i) * v[i] * bn(n, i);
}
return b;
},
CatmullRom: function (v, k) {
var m = v.length - 1;
var f = m * k;
var i = Math.floor(f);
var fn = TWEEN.Interpolation.Utils.CatmullRom;
if (v[0] === v[m]) {
if (k < 0) {
i = Math.floor(f = m * (1 + k));
}
return fn(v[(i - 1 + m) % m], v[i], v[(i + 1) % m], v[(i + 2) % m], f -
i);
} else {
if (k < 0) {
return v[0] - (fn(v[0], v[0], v[1], v[1], -f) - v[0]);
}
if (k > 1) {
return v[m] - (fn(v[m], v[m], v[m - 1], v[m - 1], f - m) - v[m]);
}
return fn(v[i ? i - 1 : 0], v[i], v[m < i + 1 ? m : i + 1], v[m <
i + 2 ? m : i + 2], f - i);
}
},
Utils: {
Linear: function (p0, p1, t) {
return (p1 - p0) * t + p0;
},
Bernstein: function (n, i) {
var fc = TWEEN.Interpolation.Utils.Factorial;
return fc(n) / fc(i) / fc(n - i);
},
Factorial: (function () {
var a = [1];
return function (n) {
var s = 1;
if (a[n]) {
return a[n];
}
for (var i = n; i > 1; i--) {
s *= i;
}
a[n] = s;
return s;
};
})(),
CatmullRom: function (p0, p1, p2, p3, t) {
var v0 = (p2 - p0) * 0.5;
var v1 = (p3 - p1) * 0.5;
var t2 = t * t;
var t3 = t * t2;
return (2 * p1 - 2 * p2 + v0 + v1) * t3 + (- 3 * p1 + 3 * p2 - 2 * v0 -
v1) * t2 + v0 * t + p1;
}
}
};
// UMD (Universal Module Definition)
(function (root) {
if (typeof define === 'function' && define.amd) {
// AMD
define([], function () {
return TWEEN;
});
} else if (typeof module !== 'undefined' && typeof
exports === 'object') {
// Node.js
module.exports = TWEEN;
} else if (root !== undefined) {
// Global variable
root.TWEEN = TWEEN;
}
})(this);