app/assets/javascripts/routing_engines/graphhopper_bicycle.js

   1 // GraphHopper bicycle engine
   2
   3 OSM.RoutingEngines.list.push({
   4     name: "javascripts.directions.engines.graphhopper_bike",
   5     creditline: 'Directions courtesy of <a href="http://graphhopper.com/routing/" target="_blank">Graphhopper</a>',
   6     draggable: true,
   7     _hints: {},
   8     getRoute: function(isFinal, points) {
   9         var url = "http://graphhopper.com/routing/api/route?vehicle=bike&locale=" + I18n.currentLocale();
  10         for (var i = 0; i < points.length; i++) {
  11             var pair = points[i].join(',');
  12             url += "&point=" + pair;
  13         }
  14         if (isFinal)
  15             url += "&instructions=true";
  16         this.requestJSONP(url + "&type=jsonp&callback=");
  17     },
  18     gotRoute: function(router, data) {
  19         if (!data.info.routeFound) {
  20             return false;
  21         }
  22         // Draw polyline
  23         var line = L.PolylineUtil.decode(data.route.coordinates);
  24         router.setPolyline(line);
  25         // Assemble instructions
  26         var steps = [];
  27         var instr = data.route.instructions;
  28         for (i = 0; i < instr.descriptions.length; i++) {
  29             var indi = instr.indications[i];
  30             var instrCode = (i==instr.descriptions.length-1) ? 15 : this.GH_INSTR_MAP[indi];
  31             var instrText = "<b>" + (i + 1) + ".</b> ";
  32             instrText += instr.descriptions[i];
  33             var latlng = instr.latLngs[i];
  34             var distInMeter = instr.distances[i];
  35             steps.push([{lat: latlng[0], lng: latlng[1]}, instrCode, instrText, distInMeter]);
  36         }
  37         router.setItinerary({steps: steps});
  38         return true;
  39     },
  40     GH_INSTR_MAP: {
  41         "-3": 6, // sharp left
  42         "-2": 7, // left
  43         "-1": 8, // slight left
  44         0: 0, // straight
  45         1: 1, // slight right
  46         2: 2, // right
  47         3: 3 // sharp right
  48     }
  49 });