javascript - 使用javascript删除谷歌地图路径中的直线

Question

要求是在谷歌地图上绘制具有多个路径点的起始位置和结束位置之间的路径。路径很好，但问题是坐标之间有几条直线。如何去除坐标之间多余的直线？

下面给出了我的代码

<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
    var markers = [
            {
                "title": 'A',
                "lat": '26.3489',
                "lng": ' 92.6845',
                "description": 'A'
            }
        ,
            {
                "title": 'B',
                "lat": '26.3546',
                "lng": '92.6902',
                "description": 'B'
            }
       ,
            {
                "title": 'D',
                "lat": '26.3508',
                "lng": '92.7102',
                "description": 'D'
            }

         ,
            {
                "title": 'E',
                "lat": '26.4285',
                "lng": '92.8497',
                "description": 'E'
            } 
        ,
          {
              "title": 'E',
              "lat": '26.5486',
              "lng": '92.9008',
              "description": 'E'
          } 
        ,
          {
              "title": 'E',
              "lat": ' 26.6567',
              "lng": '92.7717',
              "description": 'E'
          } 

         ,
            {
                "title": 'C',
                "lat": '26.807',
                "lng": '92.895',
                "description": 'C'
            }
        , 

    ];
    window.onload = function () {
        var mapOptions = {
            center: new google.maps.LatLng(markers[0].lat, markers[0].lng),
            zoom: 10,
            mapTypeId: google.maps.MapTypeId.ROADMAP
        };
        var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
        var infoWindow = new google.maps.InfoWindow();
        var lat_lng = new Array();
        var latlngbounds = new google.maps.LatLngBounds();
        for (i = 0; i < markers.length; i++) {
            var data = markers[i]
            var myLatlng = new google.maps.LatLng(data.lat, data.lng);
            lat_lng.push(myLatlng);
            var marker = new google.maps.Marker({
                position: myLatlng,
                map: map,
                title: data.title
            });
            latlngbounds.extend(marker.position);
            (function (marker, data) {
                google.maps.event.addListener(marker, "click", function (e) {
                    infoWindow.setContent(data.description);
                    infoWindow.open(map, marker);
                });
            })(marker, data);
        }
        map.setCenter(latlngbounds.getCenter());
        map.fitBounds(latlngbounds);

        //***********ROUTING****************//

        //Initialize the Path Array
        var path = new google.maps.MVCArray();

        //Initialize the Direction Service
        var service = new google.maps.DirectionsService();

        //Set the Path Stroke Color
        var poly = new google.maps.Polyline({ map: map, strokeColor: '#4986E7' });

        //Loop and Draw Path Route between the Points on MAP
        for (var i = 0; i < lat_lng.length; i++) {
            if ((i + 1) < lat_lng.length) {
                var src = lat_lng[i];
                var des = lat_lng[i + 1];
                path.push(src);
                poly.setPath(path);
                service.route({
                    origin: src,
                    destination: des,
                    travelMode: google.maps.DirectionsTravelMode.DRIVING
                }, function (result, status) {
                    if (status == google.maps.DirectionsStatus.OK) {
                        for (var i = 0, len = result.routes[0].overview_path.length; i < len; i++) {
                            path.push(result.routes[0].overview_path[i]);
                        }
                    }
                });
            }
        }
    }
</script>
<div id="dvMap" style="width: 500px; height: 500px">
</div>

这是 fiddle https://jsfiddle.net/ruchs2ko/1/ 中的示例

Answer 1

不要将 src 点无序地推送到路径上(方向服务是异步的)。删除这一行:

path.push(src);

并更改代码以将每个方向结果呈现为单独的折线。

相关问题:

• Inconsistent behaviour drawing a route between two points in Google Maps v3

updated fiddle

代码片段:

var markers = [{
    "title": 'A',
    "lat": '26.3489',
    "lng": ' 92.6845',
    "description": 'A'
  }, {
    "title": 'B',
    "lat": '26.3546',
    "lng": '92.6902',
    "description": 'B'
  }, {
    "title": 'D',
    "lat": '26.3508',
    "lng": '92.7102',
    "description": 'D'
  }

  , {
    "title": 'E',
    "lat": '26.4285',
    "lng": '92.8497',
    "description": 'E'
  }, {
    "title": 'E',
    "lat": '26.5486',
    "lng": '92.9008',
    "description": 'E'
  }, {
    "title": 'E',
    "lat": ' 26.6567',
    "lng": '92.7717',
    "description": 'E'
  }

  , {
    "title": 'C',
    "lat": '26.807',
    "lng": '92.895',
    "description": 'C'
  },

];
window.onload = function() {
  var mapOptions = {
    center: new google.maps.LatLng(markers[0].lat, markers[0].lng),
    zoom: 10,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  };
  var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
  var infoWindow = new google.maps.InfoWindow();
  var lat_lng = new Array();
  var latlngbounds = new google.maps.LatLngBounds();
  for (i = 0; i < markers.length; i++) {
    var data = markers[i]
    var myLatlng = new google.maps.LatLng(data.lat, data.lng);
    lat_lng.push(myLatlng);
    var marker = new google.maps.Marker({
      position: myLatlng,
      map: map,
      title: data.title
    });
    latlngbounds.extend(marker.position);
    (function(marker, data) {
      google.maps.event.addListener(marker, "click", function(e) {
        infoWindow.setContent(data.description);
        infoWindow.open(map, marker);
      });
    })(marker, data);
  }
  map.setCenter(latlngbounds.getCenter());
  map.fitBounds(latlngbounds);

  //***********ROUTING****************//

  //Initialize the Direction Service
  var service = new google.maps.DirectionsService();

  //Loop and Draw Path Route between the Points on MAP
  for (var i = 0; i < lat_lng.length; i++) {
    if ((i + 1) < lat_lng.length) {
      var src = lat_lng[i];
      var des = lat_lng[i + 1];
      service.route({
        origin: src,
        destination: des,
        travelMode: google.maps.DirectionsTravelMode.DRIVING
      }, function(result, status) {
        if (status == google.maps.DirectionsStatus.OK) {
          //Initialize the Path Array
          var path = new google.maps.MVCArray();

          //Set the Path Stroke Color
          var poly = new google.maps.Polyline({
            map: map,
            strokeColor: '#4986E7'
          });
          poly.setPath(path);

          for (var i = 0, len = result.routes[0].overview_path.length; i < len; i++) {
            path.push(result.routes[0].overview_path[i]);
          }
        }
      });
    }
  }
}

html,
body {
  height: 100%;
  width: 100%;
}

#dvMap{
  height: 90%;
  width: 100%;
}

<div id="dvMap"></div>

<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script>