HERE 地图 javascript API 多个路径点

Question

我正在使用 Here 地图 Javascript API。如何以编程方式添加多个航路点？我试过这个：

  var via = new Array();
  var len = waypoints.length-1;
  for(var i = 1; i < waypoints.length-1; i++){
   via.push("waypoint" + i + ":" + waypoints[i][0] + "," + waypoints[i][1] + ",");
   //console.log(waypnts);
  }
  console.log(via);
   var router = platform.getRoutingService(),
routeRequestParams = {
  mode: 'fastest;truck;',
  grossWeight: '40',
  height: '4.0',
  width: '2.55',
  length: '18.25',
  axleCount: '5',
  excludecountries: 'CHE',
  representation: 'display',
  alternatives: '3',
  routeattributes : 'waypoints,summary,legs',
  maneuverattributes: 'direction,action',
  //RouteRepresentationModeType:'dragNDrop',
  start:waypoints[0][0] + "," + waypoints[0][1],

  destination:waypoints[len][0] + "," + waypoints[len][1]
};

我尝试将变量via 添加到routeRequestParams 但没有成功。

Answer 1

要定义 Via 点，请使用 H.service.Url.MultiValueQueryParameter 类，详见https://developer.here.com/documentation/maps/3.1.19.0/api_reference/H.service.Url.MultiValueQueryParameter.html请参阅示例代码：

// Assumption: the platform is instantiated
let router = platform.getRoutingService(null, 8);
router.calculateRoute({
  'origin': '48.86,2.31',
  'destination': '48.86,2.35',
  // defines multiple waypoints
  'via': new H.service.Url.MultiValueQueryParameter(['48.8664,2.3234', '48.8703,2.3499']),
  // returns route shape as a polyline in response
  'return': 'polyline',
  'transportMode': 'car'
}, (result) => {
  const sections = result.routes[0].sections;
  const lineStrings = [];
  sections.forEach((section) => {
    // convert Flexible Polyline encoded string to geometry
    lineStrings.push(H.geo.LineString.fromFlexiblePolyline(section.polyline));
  });
  const multiLineString = new H.geo.MultiLineString(lineStrings);
  const bounds = multiLineString.getBoundingBox();
  // render route on the map
  map.addObject(new H.map.Polyline(multiLineString, {style: {lineWidth: 5}}));
  // zoom to polyline
  map.getViewModel().setLookAtData({bounds});
}, console.error);