Examples with Weighting com.graphhopper.routing.weighting.Weighting used on opensource projects

Example 56 with Weighting

use of com.graphhopper.routing.weighting.Weighting in project graphhopper by graphhopper.

the class LowLevelAPIExample method createAndSaveGraph.

public static void createAndSaveGraph() {
    FlagEncoder encoder = new CarFlagEncoder();
    EncodingManager em = EncodingManager.create(encoder);
    GraphHopperStorage graph = new GraphBuilder(em).setRAM(graphLocation, true).create();
    // Make a weighted edge between two nodes and set average speed to 50km/h
    EdgeIteratorState edge = graph.edge(0, 1).setDistance(1234).set(encoder.getAverageSpeedEnc(), 50);
    // Set node coordinates and build location index
    NodeAccess na = graph.getNodeAccess();
    graph.edge(0, 1).set(encoder.getAccessEnc(), true).set(encoder.getAverageSpeedEnc(), 10).setDistance(1530);
    na.setNode(0, 15.15, 20.20);
    na.setNode(1, 15.25, 20.21);
    LocationIndexTree index = new LocationIndexTree(graph, graph.getDirectory());
    index.prepareIndex();
    // Flush the graph and location index to disk
    graph.flush();
    index.flush();
    graph.close();
    index.close();
    // Load the graph ... can be also in a different code location
    graph = new GraphBuilder(em).setRAM(graphLocation, true).build();
    graph.loadExisting();
    // Load the location index
    index = new LocationIndexTree(graph.getBaseGraph(), graph.getDirectory());
    if (!index.loadExisting())
        throw new IllegalStateException("location index cannot be loaded!");
    // calculate with location index
    Snap fromSnap = index.findClosest(15.15, 20.20, EdgeFilter.ALL_EDGES);
    Snap toSnap = index.findClosest(15.25, 20.21, EdgeFilter.ALL_EDGES);
    QueryGraph queryGraph = QueryGraph.create(graph, fromSnap, toSnap);
    Weighting weighting = new FastestWeighting(encoder);
    Path path = new Dijkstra(queryGraph, weighting, TraversalMode.NODE_BASED).calcPath(fromSnap.getClosestNode(), toSnap.getClosestNode());
    assert Helper.round(path.getDistance(), -2) == 1500;
    // calculate without location index (get the fromId and toId nodes from other code parts)
    path = new Dijkstra(graph, weighting, TraversalMode.NODE_BASED).calcPath(0, 1);
    assert Helper.round(path.getDistance(), -2) == 1500;
}

Example 57 with Weighting

use of com.graphhopper.routing.weighting.Weighting in project graphhopper by graphhopper.

the class SPTResource method doGet.

// Annotating this as application/json because errors come out as json, and
// IllegalArgumentExceptions are not mapped to a fixed mediatype, because in RouteResource, it could be GPX.
@GET
@Produces({ "text/csv", "application/json" })
public Response doGet(@Context UriInfo uriInfo, @QueryParam("profile") String profileName, @QueryParam("reverse_flow") @DefaultValue("false") boolean reverseFlow, @QueryParam("point") @NotNull GHPointParam point, @QueryParam("columns") String columnsParam, @QueryParam("time_limit") @DefaultValue("600") LongParam timeLimitInSeconds, @QueryParam("distance_limit") @DefaultValue("-1") LongParam distanceInMeter) {
    StopWatch sw = new StopWatch().start();
    PMap hintsMap = new PMap();
    RouteResource.initHints(hintsMap, uriInfo.getQueryParameters());
    hintsMap.putObject(Parameters.CH.DISABLE, true);
    hintsMap.putObject(Parameters.Landmark.DISABLE, true);
    if (Helper.isEmpty(profileName)) {
        profileName = profileResolver.resolveProfile(hintsMap).getName();
        removeLegacyParameters(hintsMap);
    }
    errorIfLegacyParameters(hintsMap);
    Profile profile = graphHopper.getProfile(profileName);
    if (profile == null)
        throw new IllegalArgumentException("The requested profile '" + profileName + "' does not exist");
    LocationIndex locationIndex = graphHopper.getLocationIndex();
    Graph graph = graphHopper.getGraphHopperStorage();
    Weighting weighting = graphHopper.createWeighting(profile, hintsMap);
    BooleanEncodedValue inSubnetworkEnc = graphHopper.getEncodingManager().getBooleanEncodedValue(Subnetwork.key(profileName));
    if (hintsMap.has(Parameters.Routing.BLOCK_AREA)) {
        GraphEdgeIdFinder.BlockArea blockArea = GraphEdgeIdFinder.createBlockArea(graph, locationIndex, Collections.singletonList(point.get()), hintsMap, new FiniteWeightFilter(weighting));
        weighting = new BlockAreaWeighting(weighting, blockArea);
    }
    Snap snap = locationIndex.findClosest(point.get().lat, point.get().lon, new DefaultSnapFilter(weighting, inSubnetworkEnc));
    if (!snap.isValid())
        throw new IllegalArgumentException("Point not found:" + point);
    QueryGraph queryGraph = QueryGraph.create(graph, snap);
    NodeAccess nodeAccess = queryGraph.getNodeAccess();
    TraversalMode traversalMode = profile.isTurnCosts() ? EDGE_BASED : NODE_BASED;
    ShortestPathTree shortestPathTree = new ShortestPathTree(queryGraph, queryGraph.wrapWeighting(weighting), reverseFlow, traversalMode);
    if (distanceInMeter.get() > 0) {
        shortestPathTree.setDistanceLimit(distanceInMeter.get());
    } else {
        double limit = timeLimitInSeconds.get() * 1000;
        shortestPathTree.setTimeLimit(limit);
    }
    final String COL_SEP = ",", LINE_SEP = "\n";
    List<String> columns;
    if (!Helper.isEmpty(columnsParam))
        columns = Arrays.asList(columnsParam.split(","));
    else
        columns = Arrays.asList("longitude", "latitude", "time", "distance");
    if (columns.isEmpty())
        throw new IllegalArgumentException("Either omit the columns parameter or specify the columns via comma separated values");
    Map<String, EncodedValue> pathDetails = new HashMap<>();
    for (String col : columns) {
        if (encodingManager.hasEncodedValue(col))
            pathDetails.put(col, encodingManager.getEncodedValue(col, EncodedValue.class));
    }
    StreamingOutput out = output -> {
        try (Writer writer = new BufferedWriter(new OutputStreamWriter(output, Helper.UTF_CS))) {
            StringBuilder sb = new StringBuilder();
            for (String col : columns) {
                if (sb.length() > 0)
                    sb.append(COL_SEP);
                sb.append(col);
            }
            sb.append(LINE_SEP);
            writer.write(sb.toString());
            shortestPathTree.search(snap.getClosestNode(), l -> {
                IsoLabelWithCoordinates label = isoLabelWithCoordinates(nodeAccess, l);
                sb.setLength(0);
                for (int colIndex = 0; colIndex < columns.size(); colIndex++) {
                    String col = columns.get(colIndex);
                    if (colIndex > 0)
                        sb.append(COL_SEP);
                    switch(col) {
                        case "node_id":
                            sb.append(label.nodeId);
                            continue;
                        case "prev_node_id":
                            sb.append(label.prevNodeId);
                            continue;
                        case "edge_id":
                            sb.append(label.edgeId);
                            continue;
                        case "prev_edge_id":
                            sb.append(label.prevEdgeId);
                            continue;
                        case "distance":
                            sb.append(label.distance);
                            continue;
                        case "prev_distance":
                            sb.append(label.prevCoordinate == null ? 0 : label.prevDistance);
                            continue;
                        case "time":
                            sb.append(label.timeMillis);
                            continue;
                        case "prev_time":
                            sb.append(label.prevCoordinate == null ? 0 : label.prevTimeMillis);
                            continue;
                        case "longitude":
                            sb.append(Helper.round6(label.coordinate.lon));
                            continue;
                        case "prev_longitude":
                            sb.append(label.prevCoordinate == null ? null : Helper.round6(label.prevCoordinate.lon));
                            continue;
                        case "latitude":
                            sb.append(Helper.round6(label.coordinate.lat));
                            continue;
                        case "prev_latitude":
                            sb.append(label.prevCoordinate == null ? null : Helper.round6(label.prevCoordinate.lat));
                            continue;
                    }
                    if (!EdgeIterator.Edge.isValid(label.edgeId))
                        continue;
                    EdgeIteratorState edge = queryGraph.getEdgeIteratorState(label.edgeId, label.nodeId);
                    if (edge == null)
                        continue;
                    if (col.equals(Parameters.Details.STREET_NAME)) {
                        sb.append(edge.getName().replaceAll(",", ""));
                        continue;
                    }
                    EncodedValue ev = pathDetails.get(col);
                    if (ev instanceof DecimalEncodedValue) {
                        DecimalEncodedValue dev = (DecimalEncodedValue) ev;
                        sb.append(reverseFlow ? edge.getReverse(dev) : edge.get(dev));
                    } else if (ev instanceof EnumEncodedValue) {
                        EnumEncodedValue eev = (EnumEncodedValue) ev;
                        sb.append(reverseFlow ? edge.getReverse(eev) : edge.get(eev));
                    } else if (ev instanceof BooleanEncodedValue) {
                        BooleanEncodedValue eev = (BooleanEncodedValue) ev;
                        sb.append(reverseFlow ? edge.getReverse(eev) : edge.get(eev));
                    } else if (ev instanceof IntEncodedValue) {
                        IntEncodedValue eev = (IntEncodedValue) ev;
                        sb.append(reverseFlow ? edge.getReverse(eev) : edge.get(eev));
                    } else {
                        throw new IllegalArgumentException("Unknown property " + col);
                    }
                }
                sb.append(LINE_SEP);
                try {
                    writer.write(sb.toString());
                } catch (IOException ex) {
                    throw new RuntimeException(ex);
                }
            });
            logger.info("took: " + sw.stop().getSeconds() + ", visited nodes:" + shortestPathTree.getVisitedNodes() + ", " + uriInfo.getQueryParameters());
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    };
    // Give media type explicitly since we are annotating CSV and JSON, because error messages are JSON.
    return Response.ok(out).type("text/csv").build();
}