Mam kilka znaczników na mapie z narysowanymi poliliniami. Chciałbym przesunąć każdy znacznik wzdłuż ścieżki polilinii, aby symulować jednoczesny ruch każdego znacznika.

Mam problemy z robieniem tego, że tylko ostatni znacznik się porusza, a reszta nie. Będąc nowym w używaniu tej technologii programowania, myślę, że coś jest nie tak z moim kodem, zwłaszcza sposób, w jaki próbuję animować każdy znacznik. Potrzebuję wskazówek na ten temat.

Oto moja praca do tej pory:Jsbin DEMO

  var startLoc = new Array();
  startLoc[0] = 'rio claro, trinidad';
  startLoc[1] = 'preysal, trinidad';
  startLoc[2] = 'san fernando, trinidad';
  startLoc[3] = 'couva, trinidad';

  var endLoc = new Array();
  endLoc[0] = 'princes town, trinidad';
  endLoc[1] = 'tabaquite, trinidad';
  endLoc[2] = 'mayaro, trinidad';
  endLoc[3] = 'arima, trinidad';


  var Colors = ["#FF0000", "#00FF00", "#0000FF"];


function initialize() {  

  infowindow = new google.maps.InfoWindow(
    { 
      size: new google.maps.Size(150,50)
    });

    var myOptions = {
      zoom: 10,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    }
    map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

    address = 'Trinidad and Tobago'
    geocoder = new google.maps.Geocoder();
    geocoder.geocode( { 'address': address}, function(results, status) {
     map.setCenter(results[0].geometry.location);

    }); 
  } 


function createMarker(latlng, label, html) {
// alert("createMarker("+latlng+","+label+","+html+","+color+")");
    var contentString = '<b>'+label+'</b><br>'+html;
    var marker = new google.maps.Marker({
        position: latlng,
        map: map,
        title: label,
        zIndex: Math.round(latlng.lat()*-100000)<<5
        });
        marker.myname = label;


    google.maps.event.addListener(marker, 'click', function() {
        infowindow.setContent(contentString); 
        infowindow.open(map,marker);
        });
    return marker;
}  

function setRoutes(){   

    var directionsDisplay = new Array();

    for (var i=0; i< startLoc.length; i++){

    var rendererOptions = {
        map: map,
        suppressMarkers : true
    }
    directionsService = new google.maps.DirectionsService();

    var travelMode = google.maps.DirectionsTravelMode.DRIVING;  

    var request = {
        origin: startLoc[i],
        destination: endLoc[i],
        travelMode: travelMode
    };  

        directionsService.route(request,makeRouteCallback(directionsDisplay[i]));

    }   


    function makeRouteCallback(disp){
        return function(response, status){

          if (status == google.maps.DirectionsStatus.OK){

            var bounds = new google.maps.LatLngBounds();
            var route = response.routes[0];
            startLocation = new Object();
            endLocation = new Object();


            polyline = new google.maps.Polyline({
            path: [],
            strokeColor: '#FFFF00',
            strokeWeight: 3
            });

            poly2 = new google.maps.Polyline({
            path: [],
            strokeColor: '#FFFF00',
            strokeWeight: 3
            });     


            // For each route, display summary information.
            var path = response.routes[0].overview_path;
            var legs = response.routes[0].legs;


            //Routes
            if (status == google.maps.DirectionsStatus.OK){
                console.log(response);

                disp = new google.maps.DirectionsRenderer(rendererOptions);     
                disp.setMap(map);
                disp.setDirections(response);


            //Markers               
            for (i=0;i<legs.length;i++) {
              if (i == 0) { 
                startLocation.latlng = legs[i].start_location;
                startLocation.address = legs[i].start_address;
                // marker = google.maps.Marker({map:map,position: startLocation.latlng});
                marker = createMarker(legs[i].start_location,"start",legs[i].start_address,"green");
              }
              endLocation.latlng = legs[i].end_location;
              endLocation.address = legs[i].end_address;
              var steps = legs[i].steps;

              for (j=0;j<steps.length;j++) {
                var nextSegment = steps[j].path;                
                var nextSegment = steps[j].path;

                for (k=0;k<nextSegment.length;k++) {
                    polyline.getPath().push(nextSegment[k]);
                    //bounds.extend(nextSegment[k]);
                }

              }
            }       

            }


        }
         polyline.setMap(map);
         //map.fitBounds(bounds);
         startAnimation();  




    }

    }

}

    var lastVertex = 1;
    var stepnum=0;
    var step = 50; // 5; // metres
    var tick = 100; // milliseconds
    var eol;
//----------------------------------------------------------------------                
 function updatePoly(d) {
 // Spawn a new polyline every 20 vertices, because updating a 100-vertex poly is too slow
    if (poly2.getPath().getLength() > 20) {
          poly2=new google.maps.Polyline([polyline.getPath().getAt(lastVertex-1)]);
          // map.addOverlay(poly2)
        }

    if (polyline.GetIndexAtDistance(d) < lastVertex+2) {
        if (poly2.getPath().getLength()>1) {
            poly2.getPath().removeAt(poly2.getPath().getLength()-1)
        }
            poly2.getPath().insertAt(poly2.getPath().getLength(),polyline.GetPointAtDistance(d));
    } else {
        poly2.getPath().insertAt(poly2.getPath().getLength(),endLocation.latlng);
    }
 }
//----------------------------------------------------------------------------

function animate(d) {

   if (d>eol) {

      marker.setPosition(endLocation.latlng);
      return;
   }
    var p = polyline.GetPointAtDistance(d);

    //map.panTo(p);
    marker.setPosition(p);
    updatePoly(d);
    timerHandle = setTimeout("animate("+(d+step)+")", tick);
}

//-------------------------------------------------------------------------

function startAnimation() {
        eol=polyline.Distance();
        map.setCenter(polyline.getPath().getAt(0));

        poly2 = new google.maps.Polyline({path: [polyline.getPath().getAt(0)], strokeColor:"#FFFF00", strokeWeight:3});

        setTimeout("animate(50)",2000);  // Allow time for the initial map display
}

//----------------------------------------------------------------------------    



</script>
</head>
<body onload="initialize()">

<div id="tools">

    <button onclick="setRoutes();">Start</button>

</div>

<div id="map_canvas" style="width:100%;height:100%;"></div>