// tween.js MIT License
(function(global,factory){typeof exports==='object'&&typeof module!=='undefined'?module.exports=factory():typeof define==='function'&&define.amd?define(factory):(global.TWEEN=factory())}(this,(function(){'use strict';var version='18.4.2';var _Group=function(){this._tweens={};this._tweensAddedDuringUpdate={}};_Group.prototype={getAll:function(){return Object.keys(this._tweens).map(function(tweenId){return this._tweens[tweenId]}.bind(this))},removeAll:function(){this._tweens={}},add:function(tween){this._tweens[tween.getId()]=tween;this._tweensAddedDuringUpdate[tween.getId()]=tween},remove:function(tween){delete this._tweens[tween.getId()];delete this._tweensAddedDuringUpdate[tween.getId()]},update:function(time,preserve){var tweenIds=Object.keys(this._tweens);if(tweenIds.length===0){return false}time=time!==undefined?time:TWEEN.now();while(tweenIds.length>0){this._tweensAddedDuringUpdate={};for(var i=0;i<tweenIds.length;i+=1){var tween=this._tweens[tweenIds[i]];if(tween&&tween.update(time)===false){tween._isPlaying=false;if(!preserve){delete this._tweens[tweenIds[i]]}}}tweenIds=Object.keys(this._tweensAddedDuringUpdate)}return true}};var TWEEN=new _Group();TWEEN.Group=_Group;TWEEN._nextId=0;TWEEN.nextId=function(){return TWEEN._nextId++};if(typeof(self)==='undefined'&&typeof(process)!=='undefined'&&process.hrtime){TWEEN.now=function(){var time=process.hrtime();return time[0]*1000+time[1]/1000000;}}else if(typeof(self)!=='undefined'&&self.performance!==undefined&&self.performance.now!==undefined){TWEEN.now=self.performance.now.bind(self.performance )}else if(Date.now!==undefined){TWEEN.now=Date.now}else{TWEEN.now=function(){return new Date().getTime()}}TWEEN.Tween=function(object,group){this._isPaused=false;this._pauseStart=null;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._onRepeatCallback=null;this._onCompleteCallback=null;this._onStopCallback=null;this._group=group||TWEEN;this._id=TWEEN.nextId()};TWEEN.Tween.prototype={getId:function(){return this._id},isPlaying:function(){return this._isPlaying},isPaused:function(){return this._isPaused},to:function(properties,duration){this._valuesEnd=Object.create(properties);if(duration!==undefined){this._duration=duration}return this},duration:function duration(d){this._duration=d;return this},start:function(time){this._group.add(this);this._isPlaying=true;this._isPaused=false;this._onStartCallbackFired=false;this._startTime=time!==undefined?typeof time==='string'?TWEEN.now()+parseFloat(time):time:TWEEN.now();this._startTime+=this._delayTime;for(var property in this._valuesEnd){if(this._valuesEnd[property]instanceof Array){if(this._valuesEnd[property].length===0){continue}this._valuesEnd[property]=[this._object[property]].concat(this._valuesEnd[property])}if(this._object[property]===undefined){continue}if(typeof(this._valuesStart[property])==='undefined'){this._valuesStart[property]=this._object[property]}if((this._valuesStart[property]instanceof Array)===false){this._valuesStart[property]*=1.0;}this._valuesStartRepeat[property]=this._valuesStart[property]||0}return this},stop:function(){if(!this._isPlaying){return this}this._group.remove(this);this._isPlaying=false;this._isPaused=false;if(this._onStopCallback!==null){this._onStopCallback(this._object)}this.stopChainedTweens();return this},end:function(){this.update(Infinity);return this},pause:function(time){if(this._isPaused||!this._isPlaying){return this}this._isPaused=true;this._pauseStart=time===undefined?TWEEN.now():time;this._group.remove(this);return this},resume:function(time){if(!this._isPaused||!this._isPlaying){return this}this._isPaused=false;this._startTime+=(time===undefined?TWEEN.now():time)-this._pauseStart;this._pauseStart=0;this._group.add(this);return this},stopChainedTweens:function(){for(var i=0,numChainedTweens=this._chainedTweens.length;i<numChainedTweens;i+=1){this._chainedTweens[i].stop()}},group:function(group){this._group=group;return this},delay:function(amount){this._delayTime=amount;return this},repeat:function(times){this._repeat=times;return this},repeatDelay:function(amount){this._repeatDelayTime=amount;return this},yoyo:function(yoyo){this._yoyo=yoyo;return this},easing:function(easingFunction){this._easingFunction=easingFunction;return this},interpolation:function(interpolationFunction){this._interpolationFunction=interpolationFunction;return this},chain:function(){this._chainedTweens=arguments;return this},onStart:function(callback){this._onStartCallback=callback;return this},onUpdate:function(callback){this._onUpdateCallback=callback;return this},onRepeat:function onRepeat(callback){this._onRepeatCallback=callback;return this},onComplete:function(callback){this._onCompleteCallback=callback;return this},onStop:function(callback){this._onStopCallback=callback;return this},update:function(time){var property;var elapsed;var value;if(time<this._startTime){return true}if(this._onStartCallbackFired===false){if(this._onStartCallback!==null){this._onStartCallback(this._object)}this._onStartCallbackFired=true}elapsed=(time-this._startTime)/this._duration;elapsed=(this._duration===0||elapsed>1)?1:elapsed;value=this._easingFunction(elapsed);for(property in this._valuesEnd){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{if(typeof(end)==='string'){if(end.charAt(0)==='+'||end.charAt(0)==='-'){end=start+parseFloat(end)}else{end=parseFloat(end)}}if(typeof(end)==='number'){this._object[property]=start+(end-start)*value}}}if(this._onUpdateCallback!==null){this._onUpdateCallback(this._object,elapsed)}if(elapsed===1){if(this._repeat>0){if(isFinite(this._repeat)){this._repeat-=1}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}if(this._onRepeatCallback!==null){this._onRepeatCallback(this._object)}return true}else{if(this._onCompleteCallback!==null){this._onCompleteCallback(this._object)}for(var i=0,numChainedTweens=this._chainedTweens.length;i<numChainedTweens;i+=1){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+=1){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-=1){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}}};TWEEN.version=version;return TWEEN})));