/** @return a map from each vertex to minimum travel time over the course of the day. */
private Map<Vertex, Double> makePoints () throws Exception {
rangeCheckParameters();
request = buildRequest(0);
Graph graph = otpServer.graphService.getGraph();
//double speed = request.getWalkSpeed();
Coordinate originCoord = request.from.getCoordinate();
if (originCoord == null) return null;
List<TransitStop> stops = graph.streetIndex.getNearbyTransitStops(originCoord, radiusMeters);
if (stops.isEmpty()) {
LOG.error("No stops found within {} meters.", radiusMeters);
return null;
}
if (shpName == null)
shpName = stops.get(0).getName().split(" ")[0];
StreetVertex origin = new IntersectionVertex(graph, "iso_temp", originCoord.x, originCoord.y);
for (TransitStop stop : stops) {
new StreetTransitLink(origin, stop, false);
LOG.debug("linked to stop {}", stop.getName());
}
request.setRoutingContext(graph, origin, null);
/* Make one request every M minutes over H hours */
int nRequests = (requestTimespanHours * 60) / requestSpacingMinutes;
request.clampInitialWait = (requestSpacingMinutes * 60);
Date date = request.getDateTime();
MinMap<Vertex, Double> points = new MinMap<Vertex, Double>();
for (int r = 0; r < nRequests; r++) {
request.dateTime = date.getTime() / 1000 + r * requestSpacingMinutes * 60;
LOG.debug("date: {} {}", new Date(request.dateTime), request.dateTime);
ShortestPathTree spt = sptService.getShortestPathTree(request, 10);
/* This could even be a good use for a generic SPT merging function */
for (State s : spt.getAllStates()) {
if ( stopsOnly && ! (s.getVertex() instanceof TransitStop)) continue;
points.putMin(s.getVertex(), (double)(s.getActiveTime()));
}
}
graph.removeVertexAndEdges(origin);
return points;
}