var BMapGLLib=window.BMapGLLib=BMapGLLib||{};(function(){var f=1;var e=55;var a=10000;var h=0;var c=true;var d=1;var i=2;var b=0;var g=BMapGLLib.TrackAnimation=function(l,j,k){this._map=l;this._polyline=j;this._totalPath=j.getPath();this._overallView=l.getViewport(j.getPath());this._status=i;this._opts={zoom:this._getZoom(),tilt:e,duration:a,delay:h,overallView:c};this._initOpts(k);this._expandPath=this._addPath(j.getPath())};g.prototype._getZoom=function(){return Math.min(this._overallView.zoom+f,this._map.getMaxZoom())};g.prototype._updateAniParams=function(){this._updatePathAni();this._updateViewAni();this._polyline.setPath(this._expandPath.slice(0,1))};g.prototype._updatePathAni=function(){this._expandPath=this._addPath(this._totalPath)};g.prototype._updateViewAni=function(){this._overallView=this._map.getViewport(this._totalPath);var o=this._totalPath.length;var n=[];var p=this._opts.overallView?this._opts.duration+2000:this._opts.duration;for(var j=0;j<o;j++){var m=this._totalPath[j];var l=this._pathPercents[j]*(this._opts.duration/p);n.push({center:new BMapGL.Point(m.lng,m.lat),zoom:this._opts.zoom,tilt:j===0?0:this._opts.tilt,heading:0,percentage:l})}if(this._opts.overallView){n.push({center:new BMapGL.Point(this._overallView.center.lng,this._overallView.center.lat),zoom:this._overallView.zoom-f,tilt:0,heading:0,percentage:1})}var k={duration:p,delay:0,interation:1};this._viewAni=new BMapGL.ViewAnimation(n,k)};g.prototype._addPath=function(s){var m=this._opts.duration/10;var k=s.length;var q=0;var r=[];var n=[];for(var o=1;o<k;o++){var j=this._map.getDistance(s[o-1],s[o]);r.push(j);q+=j}var l=[0];for(var o=1;o<k;o++){var p=(r[o-1]/q).toFixed(2);l[o]=l[o-1]+parseFloat(p,10);n=n.concat(this._getPath(s[o-1],s[o],p*m))}this._pathPercents=l;return n};g.prototype._getPath=function(n,k,l){var j=[];for(var m=0;m<=l;m++){j.push(new BMapGL.Point((k.lng-n.lng)/l*m+n.lng,(k.lat-n.lat)/l*m+n.lat))}return j};g.prototype._initOpts=function(j){for(var k in j){if(j.hasOwnProperty(k)){this._opts[k]=j[k]}}};g.prototype.start=function(){var j=this;setTimeout(function(){j._updateAniParams();j._map.removeOverlay(j._polyline);j._map.addOverlay(j._polyline);j._status=d;j._step(performance.now());j._map.startViewAnimation(j._viewAni)},this._opts.delay)};g.prototype.cancel=function(){this._status=i;b=0;this._map.cancelViewAnimation(this._viewAni)};g.prototype._step=function(l){if(this._status!==d){b=0;return}if(!b){b=l}var k=(l-b)/this._opts.duration;var j=Math.round(this._expandPath.length*k);this._polyline.setPath(this._expandPath.slice(0,j));if(l<b+this._opts.duration){window.requestAnimationFrame(this._step.bind(this))}else{b=0}};g.prototype.setZoom=function(j){this._opts.zoom=j};g.prototype.getZoom=function(j){return this._opts.zoom};g.prototype.setTilt=function(j){this._opts.tilt=j};g.prototype.getTilt=function(j){return this._opts.tilt};g.prototype.setDelay=function(j){this._opts.delay=j};g.prototype.getDelay=function(j){return this._opts.delay};g.prototype.setDuration=function(j){this._opts.duration=j};g.prototype.getDuration=function(j){return this._opts.duration};g.prototype.enableOverallView=function(){this._opts.overallView=true};g.prototype.disableOverallView=function(){this._opts.overallView=false};g.prototype.setPolyline=function(j){this._polyline=j;this._totalPath=j.getPath()};g.prototype.getPolyline=function(){return this._polyline}})();