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- var BMapGLLib=window.BMapGLLib=BMapGLLib||{};(function(){var g=1;var f=55;var e=0;var a=10000;var i=0;var c=true;var d=1;var j=2;var k=3;var b=0;var h=BMapGLLib.TrackAnimation=function(n,l,m){this._map=n;this._polyline=l;this._totalPath=l.getPath();this._overallView=n.getViewport(l.getPath());this._status=j;this._opts={zoom:this._getZoom(),tilt:f,heading:e,duration:a,delay:i,overallView:c};this._initOpts(m);this._expandPath=this._addPath(l.getPath());this._pauseTime=0;this._last2Points=[]};h.prototype._getZoom=function(){return Math.min(this._overallView.zoom+g,this._map.getMaxZoom())};h.prototype._updateAniParams=function(){this._updatePathAni();this._updateViewAni();this._polyline.setPath(this._expandPath.slice(0,1))};h.prototype._updatePathAni=function(){this._expandPath=this._addPath(this._totalPath)};h.prototype._updateViewAni=function(){this._overallView=this._map.getViewport(this._totalPath);var q=this._totalPath.length;var p=[];var r=this._opts.overallView?this._opts.duration+2000:this._opts.duration;for(var l=0;l<q;l++){var o=this._totalPath[l];var n=this._pathPercents[l]*(this._opts.duration/r);p.push({center:new BMapGL.Point(o.lng,o.lat),zoom:this._opts.zoom,tilt:l===0?0:this._opts.tilt,heading:l===0?0:this._opts.heading,percentage:n})}if(this._opts.overallView){p.push({center:new BMapGL.Point(this._overallView.center.lng,this._overallView.center.lat),zoom:this._overallView.zoom-g,tilt:0,heading:0,percentage:1})}var m={duration:r,delay:0,interation:1};this._viewAni=new BMapGL.ViewAnimation(p,m)};h.prototype._addPath=function(u){var o=this._opts.duration/10;var m=u.length;var s=0;var t=[];var p=[];for(var q=1;q<m;q++){var l=this._map.getDistance(u[q-1],u[q]);t.push(l);s+=l}var n=[0];for(var q=1;q<m;q++){var r=(t[q-1]/s).toFixed(2);n[q]=n[q-1]+parseFloat(r,10);p=p.concat(this._getPath(u[q-1],u[q],r*o))}this._pathPercents=n;return p};h.prototype._getPath=function(q,n,o){var m=[];if(o===0){return m}for(var p=0;p<=o;p++){var l=new BMapGL.Point((n.lng-q.lng)/o*p+q.lng,(n.lat-q.lat)/o*p+q.lat);m.push(l)}return m};h.prototype._initOpts=function(l){for(var m in l){if(l.hasOwnProperty(m)){this._opts[m]=l[m]}}};h.prototype.start=function(){var l=this;setTimeout(function(){l._updateAniParams();l._map.removeOverlay(l._polyline);l._map.addOverlay(l._polyline);l._status=d;l._step(performance.now());l._map.startViewAnimation(l._viewAni)},this._opts.delay)};h.prototype.cancel=function(){this._clearRAF();this._status=j;b=0;this._pauseTime=0;this._map.cancelViewAnimation(this._viewAni);this._map.removeOverlay(this._polyline)};h.prototype.pause=function(){if(this._status===d){this._clearRAF();this._map.pauseViewAnimation(this._viewAni);this._status=k;this._isPausing=performance.now()}};h.prototype.continue=function(){if(this._status===k){this._pauseTime+=performance.now()-this._isPausing;this._isPausing=undefined;this._status=d;this._step(performance.now());this._map.continueViewAnimation(this._viewAni)}};h.prototype._step=function(o){if(this._status===j){b=0;return}if(!b){b=o}o=o-this._pauseTime;var n=(o-b)/this._opts.duration;var l=Math.round(this._expandPath.length*n);var m=this._expandPath.slice(0,l);this._last2Points=m.slice(-4);this._polyline.setPath(m);if(o<b+this._opts.duration){this._timer=window.requestAnimationFrame(this._step.bind(this))}else{b=0;this._status=j;this._pauseTime=0}};h.prototype._clearRAF=function(){if(this._timer){window.cancelAnimationFrame(this._timer)}};h.prototype.setZoom=function(l){this._opts.zoom=l};h.prototype.getZoom=function(l){return this._opts.zoom};h.prototype.setTilt=function(l){this._opts.tilt=l};h.prototype.getTilt=function(l){return this._opts.tilt};h.prototype.setDelay=function(l){this._opts.delay=l};h.prototype.getDelay=function(l){return this._opts.delay};h.prototype.setDuration=function(l){this._opts.duration=l};h.prototype.getDuration=function(l){return this._opts.duration};h.prototype.enableOverallView=function(){this._opts.overallView=true};h.prototype.disableOverallView=function(){this._opts.overallView=false};h.prototype.setPolyline=function(l){this._polyline=l;this._totalPath=l.getPath()};h.prototype.getPolyline=function(){return this._polyline};h.prototype.getLastPoint=function(){return[this._last2Points[0],this._last2Points[3]]}})();
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