org.opentripplanner.api.resource.GraphPathToTripPlanConverter Maven / Gradle / Ivy
/* This program is free software: you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation, either version 3 of
the License, or (props, at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see paths, RoutingRequest request) {
Locale requestedLocale = request.locale;
GraphPath exemplar = paths.get(0);
Vertex tripStartVertex = exemplar.getStartVertex();
Vertex tripEndVertex = exemplar.getEndVertex();
String startName = tripStartVertex.getName(requestedLocale);
String endName = tripEndVertex.getName(requestedLocale);
// Use vertex labels if they don't have names
if (startName == null) {
startName = tripStartVertex.getLabel();
}
if (endName == null) {
endName = tripEndVertex.getLabel();
}
Place from = new Place(tripStartVertex.getX(), tripStartVertex.getY(), startName);
Place to = new Place(tripEndVertex.getX(), tripEndVertex.getY(), endName);
from.orig = request.from.name;
to.orig = request.to.name;
TripPlan plan = new TripPlan(from, to, request.getDateTime());
// Convert GraphPaths to Itineraries, keeping track of the best non-transit (e.g. walk/bike-only) option time
long bestNonTransitTime = Long.MAX_VALUE;
List itineraries = new LinkedList<>();
for (GraphPath path : paths) {
Itinerary itinerary = generateItinerary(path, request.showIntermediateStops, request.disableAlertFiltering, requestedLocale);
itinerary = adjustItinerary(request, itinerary);
if(itinerary.transitTime == 0 && itinerary.walkTime < bestNonTransitTime) {
bestNonTransitTime = itinerary.walkTime;
}
itineraries.add(itinerary);
}
// Filter and add itineraries to plan
for (Itinerary itinerary : itineraries) {
// If this is a transit option whose walk/bike time is greater than that of the walk/bike-only option,
// do not include in plan
if(itinerary.transitTime > 0 && itinerary.walkTime > bestNonTransitTime) continue;
plan.addItinerary(itinerary);
}
if (plan != null) {
for (Itinerary i : plan.itinerary) {
/* Communicate the fact that the only way we were able to get a response was by removing a slope limit. */
i.tooSloped = request.rctx.slopeRestrictionRemoved;
/* fix up from/to on first/last legs */
if (i.legs.size() == 0) {
LOG.warn("itinerary has no legs");
continue;
}
Leg firstLeg = i.legs.get(0);
firstLeg.from.orig = plan.from.orig;
Leg lastLeg = i.legs.get(i.legs.size() - 1);
lastLeg.to.orig = plan.to.orig;
}
}
request.rctx.debugOutput.finishedRendering();
return plan;
}
/**
* Check whether itinerary needs adjustments based on the request.
* @param itinerary is the itinerary
* @param request is the request containing the original trip planning options
* @return the (adjusted) itinerary
*/
private static Itinerary adjustItinerary(RoutingRequest request, Itinerary itinerary) {
// Check walk limit distance
if (itinerary.walkDistance > request.maxWalkDistance) {
itinerary.walkLimitExceeded = true;
}
// Return itinerary
return itinerary;
}
/**
* Generate an itinerary from a {@link GraphPath}. This method first slices the list of states
* at the leg boundaries. These smaller state arrays are then used to generate legs. Finally the
* rest of the itinerary is generated based on the complete state array.
*
* @param path The graph path to base the itinerary on
* @param showIntermediateStops Whether to include intermediate stops in the itinerary or not
* @return The generated itinerary
*/
public static Itinerary generateItinerary(GraphPath path, boolean showIntermediateStops, boolean disableAlertFiltering, Locale requestedLocale) {
Itinerary itinerary = new Itinerary();
State[] states = new State[path.states.size()];
State lastState = path.states.getLast();
states = path.states.toArray(states);
Edge[] edges = new Edge[path.edges.size()];
edges = path.edges.toArray(edges);
Graph graph = path.getRoutingContext().graph;
FareService fareService = graph.getService(FareService.class);
State[][] legsStates = sliceStates(states);
if (fareService != null) {
itinerary.fare = fareService.getCost(path);
}
for (State[] legStates : legsStates) {
itinerary.addLeg(generateLeg(graph, legStates, showIntermediateStops, disableAlertFiltering, requestedLocale));
}
addWalkSteps(graph, itinerary.legs, legsStates, requestedLocale);
fixupLegs(itinerary.legs, legsStates);
itinerary.duration = lastState.getElapsedTimeSeconds();
itinerary.startTime = makeCalendar(states[0]);
itinerary.endTime = makeCalendar(lastState);
calculateTimes(itinerary, states);
calculateElevations(itinerary, edges);
itinerary.walkDistance = lastState.getWalkDistance();
itinerary.transfers = lastState.getNumBoardings();
if (itinerary.transfers > 0 && !(states[0].getVertex() instanceof OnboardDepartVertex)) {
itinerary.transfers--;
}
return itinerary;
}
private static Calendar makeCalendar(State state) {
RoutingContext rctx = state.getContext();
TimeZone timeZone = rctx.graph.getTimeZone();
Calendar calendar = Calendar.getInstance(timeZone);
calendar.setTimeInMillis(state.getTimeInMillis());
return calendar;
}
/**
* Generate a {@link CoordinateArrayListSequence} based on an {@link Edge} array.
*
* @param edges The array of input edges
* @return The coordinates of the points on the edges
*/
private static CoordinateArrayListSequence makeCoordinates(Edge[] edges) {
CoordinateArrayListSequence coordinates = new CoordinateArrayListSequence();
for (Edge edge : edges) {
LineString geometry = edge.getGeometry();
if (geometry != null) {
if (coordinates.size() == 0) {
coordinates.extend(geometry.getCoordinates());
} else {
coordinates.extend(geometry.getCoordinates(), 1); // Avoid duplications
}
}
}
return coordinates;
}
/**
* Slice a {@link State} array at the leg boundaries. Leg switches occur when:
* 1. A LEG_SWITCH mode (which itself isn't part of any leg) is seen
* 2. The mode changes otherwise, for instance from BICYCLE to WALK
* 3. A PatternInterlineDwell edge (i.e. interlining) is seen
*
* @param states The one-dimensional array of input states
* @return An array of arrays of states belonging to a single leg (i.e. a two-dimensional array)
*/
private static State[][] sliceStates(State[] states) {
boolean trivial = true;
for (State state : states) {
TraverseMode traverseMode = state.getBackMode();
if (traverseMode != null && traverseMode != TraverseMode.LEG_SWITCH) {
trivial = false;
break;
}
}
if (trivial) {
throw new TrivialPathException();
}
int[] legIndexPairs = {0, states.length - 1};
List legsIndexes = new ArrayList();
for (int i = 1; i < states.length - 1; i++) {
TraverseMode backMode = states[i].getBackMode();
TraverseMode forwardMode = states[i + 1].getBackMode();
if (backMode == null || forwardMode == null) continue;
Edge edge = states[i + 1].getBackEdge();
if (backMode == TraverseMode.LEG_SWITCH || forwardMode == TraverseMode.LEG_SWITCH) {
if (backMode != TraverseMode.LEG_SWITCH) { // Start of leg switch
legIndexPairs[1] = i;
} else if (forwardMode != TraverseMode.LEG_SWITCH) { // End of leg switch
if (legIndexPairs[1] != states.length - 1) {
legsIndexes.add(legIndexPairs);
}
legIndexPairs = new int[] {i, states.length - 1};
}
} else if (backMode != forwardMode) { // Mode change => leg switch
legIndexPairs[1] = i;
legsIndexes.add(legIndexPairs);
legIndexPairs = new int[] {i, states.length - 1};
} else if (edge instanceof PatternInterlineDwell) { // Interlining => leg switch
legIndexPairs[1] = i;
legsIndexes.add(legIndexPairs);
legIndexPairs = new int[] {i + 1, states.length - 1};
}
}
// Final leg
legsIndexes.add(legIndexPairs);
State[][] legsStates = new State[legsIndexes.size()][];
// Fill the two-dimensional array with states
for (int i = 0; i < legsStates.length; i++) {
legIndexPairs = legsIndexes.get(i);
legsStates[i] = new State[legIndexPairs[1] - legIndexPairs[0] + 1];
for (int j = 0; j <= legIndexPairs[1] - legIndexPairs[0]; j++) {
legsStates[i][j] = states[legIndexPairs[0] + j];
}
}
return legsStates;
}
/**
* Generate one leg of an itinerary from a {@link State} array.
*
* @param states The array of states to base the leg on
* @param showIntermediateStops Whether to include intermediate stops in the leg or not
* @return The generated leg
*/
private static Leg generateLeg(Graph graph, State[] states, boolean showIntermediateStops, boolean disableAlertFiltering, Locale requestedLocale) {
Leg leg = new Leg();
Edge[] edges = new Edge[states.length - 1];
leg.startTime = makeCalendar(states[0]);
leg.endTime = makeCalendar(states[states.length - 1]);
// Calculate leg distance and fill array of edges
leg.distance = 0.0;
for (int i = 0; i < edges.length; i++) {
edges[i] = states[i + 1].getBackEdge();
leg.distance += edges[i].getDistance();
}
TimeZone timeZone = leg.startTime.getTimeZone();
leg.agencyTimeZoneOffset = timeZone.getOffset(leg.startTime.getTimeInMillis());
addTripFields(leg, states, requestedLocale);
addPlaces(leg, states, edges, showIntermediateStops, requestedLocale);
CoordinateArrayListSequence coordinates = makeCoordinates(edges);
Geometry geometry = GeometryUtils.getGeometryFactory().createLineString(coordinates);
leg.legGeometry = PolylineEncoder.createEncodings(geometry);
leg.interlineWithPreviousLeg = states[0].getBackEdge() instanceof PatternInterlineDwell;
addFrequencyFields(states, leg);
leg.rentedBike = states[0].isBikeRenting() && states[states.length - 1].isBikeRenting();
addModeAndAlerts(graph, leg, states, disableAlertFiltering, requestedLocale);
if (leg.isTransitLeg()) addRealTimeData(leg, states);
return leg;
}
private static void addFrequencyFields(State[] states, Leg leg) {
/* TODO adapt to new frequency handling.
if (states[0].getBackEdge() instanceof FrequencyBoard) {
State preBoardState = states[0].getBackState();
FrequencyBoard fb = (FrequencyBoard) states[0].getBackEdge();
FrequencyBasedTripPattern pt = fb.getPattern();
int boardTime;
if (preBoardState.getServiceDay() == null) {
boardTime = 0; //TODO why is this happening?
} else {
boardTime = preBoardState.getServiceDay().secondsSinceMidnight(
preBoardState.getTimeSeconds());
}
int period = pt.getPeriod(fb.getStopIndex(), boardTime); //TODO fix
leg.isNonExactFrequency = !pt.isExact();
leg.headway = period;
}
*/
}
/**
* Add a {@link WalkStep} {@link List} to a {@link Leg} {@link List}.
* It's more convenient to process all legs in one go because the previous step should be kept.
*
* @param legs The legs of the itinerary
* @param legsStates The states that go with the legs
*/
private static void addWalkSteps(Graph graph, List legs, State[][] legsStates, Locale requestedLocale) {
WalkStep previousStep = null;
String lastMode = null;
BikeRentalStationVertex onVertex = null, offVertex = null;
for (int i = 0; i < legsStates.length; i++) {
List walkSteps = generateWalkSteps(graph, legsStates[i], previousStep, requestedLocale);
String legMode = legs.get(i).mode;
if(legMode != lastMode && !walkSteps.isEmpty()) {
walkSteps.get(0).newMode = legMode;
lastMode = legMode;
}
legs.get(i).walkSteps = walkSteps;
if (walkSteps.size() > 0) {
previousStep = walkSteps.get(walkSteps.size() - 1);
} else {
previousStep = null;
}
}
}
/**
* This was originally in TransitUtils.handleBoardAlightType.
* Edges that always block traversal (forbidden pickups/dropoffs) are simply not ever created.
*/
public static String getBoardAlightMessage (int boardAlightType) {
switch (boardAlightType) {
case 1:
return "impossible";
case 2:
return "mustPhone";
case 3:
return "coordinateWithDriver";
default:
return null;
}
}
/**
* Fix up a {@link Leg} {@link List} using the information available at the leg boundaries.
* This method will fill holes in the arrival and departure times associated with a
* {@link Place} within a leg and add board and alight rules. It will also ensure that stop
* names propagate correctly to the non-transit legs that connect to them.
*
* @param legs The legs of the itinerary
* @param legsStates The states that go with the legs
*/
private static void fixupLegs(List legs, State[][] legsStates) {
for (int i = 0; i < legsStates.length; i++) {
boolean toOther = i + 1 < legsStates.length && legs.get(i + 1).interlineWithPreviousLeg;
boolean fromOther = legs.get(i).interlineWithPreviousLeg;
String boardRule = null;
String alightRule = null;
for (int j = 1; j < legsStates[i].length; j++) {
if (legsStates[i][j].getBackEdge() instanceof PatternEdge) {
PatternEdge patternEdge = (PatternEdge) legsStates[i][j].getBackEdge();
TripPattern tripPattern = patternEdge.getPattern();
Integer fromIndex = legs.get(i).from.stopIndex;
Integer toIndex = legs.get(i).to.stopIndex;
int boardType = (fromIndex != null) ? (tripPattern.getBoardType(fromIndex)) : 0;
int alightType = (toIndex != null) ? (tripPattern.getAlightType(toIndex)) : 0;
boardRule = getBoardAlightMessage(boardType);
alightRule = getBoardAlightMessage(alightType);
}
if (legsStates[i][j].getBackEdge() instanceof PathwayEdge) {
legs.get(i).pathway = true;
}
}
if (i + 1 < legsStates.length) {
legs.get(i + 1).from.arrival = legs.get(i).to.arrival;
legs.get(i).to.departure = legs.get(i + 1).from.departure;
if (legs.get(i).isTransitLeg() && !legs.get(i + 1).isTransitLeg()) {
legs.get(i + 1).from = legs.get(i).to;
}
if (!legs.get(i).isTransitLeg() && legs.get(i + 1).isTransitLeg()) {
legs.get(i).to = legs.get(i + 1).from;
}
}
if (legs.get(i).isTransitLeg()) {
if (boardRule != null && !fromOther) { // If boarding in some other leg
legs.get(i).boardRule = boardRule; // (interline), don't board now.
}
if (alightRule != null && !toOther) { // If alighting in some other
legs.get(i).alightRule = alightRule; // leg, don't alight now.
}
}
}
}
/**
* Calculate the walkTime, transitTime and waitingTime of an {@link Itinerary}.
*
* @param itinerary The itinerary to calculate the times for
* @param states The states that go with the itinerary
*/
private static void calculateTimes(Itinerary itinerary, State[] states) {
for (State state : states) {
if (state.getBackMode() == null) continue;
switch (state.getBackMode()) {
default:
itinerary.transitTime += state.getTimeDeltaSeconds();
break;
case LEG_SWITCH:
itinerary.waitingTime += state.getTimeDeltaSeconds();
break;
case WALK:
case BICYCLE:
case CAR:
itinerary.walkTime += state.getTimeDeltaSeconds();
}
}
}
/**
* Calculate the elevationGained and elevationLost fields of an {@link Itinerary}.
*
* @param itinerary The itinerary to calculate the elevation changes for
* @param edges The edges that go with the itinerary
*/
private static void calculateElevations(Itinerary itinerary, Edge[] edges) {
for (Edge edge : edges) {
if (!(edge instanceof StreetEdge)) continue;
StreetEdge edgeWithElevation = (StreetEdge) edge;
PackedCoordinateSequence coordinates = edgeWithElevation.getElevationProfile();
if (coordinates == null) continue;
// TODO Check the test below, AFAIU current elevation profile has 3 dimensions.
if (coordinates.getDimension() != 2) continue;
for (int i = 0; i < coordinates.size() - 1; i++) {
double change = coordinates.getOrdinate(i + 1, 1) - coordinates.getOrdinate(i, 1);
if (change > 0) {
itinerary.elevationGained += change;
} else if (change < 0) {
itinerary.elevationLost -= change;
}
}
}
}
/**
* Add mode and alerts fields to a {@link Leg}.
*
* @param leg The leg to add the mode and alerts to
* @param states The states that go with the leg
*/
private static void addModeAndAlerts(Graph graph, Leg leg, State[] states, boolean disableAlertFiltering, Locale requestedLocale) {
for (State state : states) {
TraverseMode mode = state.getBackMode();
Set alerts = graph.streetNotesService.getNotes(state);
Edge edge = state.getBackEdge();
if (mode != null) {
leg.mode = mode.toString();
}
if (alerts != null) {
for (Alert alert : alerts) {
leg.addAlert(alert, requestedLocale);
}
}
for (AlertPatch alertPatch : graph.getAlertPatches(edge)) {
if (disableAlertFiltering || alertPatch.displayDuring(state)) {
if (alertPatch.hasTrip()) {
// If the alert patch contains a trip and that trip match this leg only add the alert for
// this leg.
if (alertPatch.getTrip().equals(leg.tripId)) {
leg.addAlert(alertPatch.getAlert(), requestedLocale);
}
} else {
// If we are not matching a particular trip add all known alerts for this trip pattern.
leg.addAlert(alertPatch.getAlert(), requestedLocale);
}
}
}
}
}
/**
* Add trip-related fields to a {@link Leg}.
*
* @param leg The leg to add the trip-related fields to
* @param states The states that go with the leg
*/
private static void addTripFields(Leg leg, State[] states, Locale requestedLocale) {
Trip trip = states[states.length - 1].getBackTrip();
if (trip != null) {
Route route = trip.getRoute();
Agency agency = route.getAgency();
ServiceDay serviceDay = states[states.length - 1].getServiceDay();
leg.agencyId = agency.getId();
leg.agencyName = agency.getName();
leg.agencyUrl = agency.getUrl();
leg.agencyBrandingUrl = agency.getBrandingUrl();
leg.headsign = states[1].getBackDirection();
leg.route = states[states.length - 1].getBackEdge().getName(requestedLocale);
leg.routeColor = route.getColor();
leg.routeId = route.getId();
leg.routeLongName = route.getLongName();
leg.routeShortName = route.getShortName();
leg.routeTextColor = route.getTextColor();
leg.routeType = route.getType();
leg.routeBrandingUrl = route.getBrandingUrl();
leg.tripId = trip.getId();
leg.tripShortName = trip.getTripShortName();
leg.tripBlockId = trip.getBlockId();
if (serviceDay != null) {
leg.serviceDate = serviceDay.getServiceDate().getAsString();
}
if (leg.headsign == null) {
leg.headsign = trip.getTripHeadsign();
}
}
}
/**
* Add {@link Place} fields to a {@link Leg}.
* There is some code duplication because of subtle differences between departure, arrival and
* intermediate stops.
*
* @param leg The leg to add the places to
* @param states The states that go with the leg
* @param edges The edges that go with the leg
* @param showIntermediateStops Whether to include intermediate stops in the leg or not
*/
private static void addPlaces(Leg leg, State[] states, Edge[] edges, boolean showIntermediateStops,
Locale requestedLocale) {
Vertex firstVertex = states[0].getVertex();
Vertex lastVertex = states[states.length - 1].getVertex();
Stop firstStop = firstVertex instanceof TransitVertex ?
((TransitVertex) firstVertex).getStop(): null;
Stop lastStop = lastVertex instanceof TransitVertex ?
((TransitVertex) lastVertex).getStop(): null;
TripTimes tripTimes = states[states.length - 1].getTripTimes();
leg.from = makePlace(states[0], firstVertex, edges[0], firstStop, tripTimes, requestedLocale);
leg.from.arrival = null;
leg.to = makePlace(states[states.length - 1], lastVertex, null, lastStop, tripTimes, requestedLocale);
leg.to.departure = null;
if (showIntermediateStops) {
leg.stop = new ArrayList();
Stop previousStop = null;
Stop currentStop;
for (int i = 1; i < edges.length; i++) {
Vertex vertex = states[i].getVertex();
if (!(vertex instanceof TransitVertex)) continue;
currentStop = ((TransitVertex) vertex).getStop();
if (currentStop == firstStop) continue;
if (currentStop == previousStop) { // Avoid duplication of stops
leg.stop.get(leg.stop.size() - 1).departure = makeCalendar(states[i]);
continue;
}
previousStop = currentStop;
if (currentStop == lastStop) break;
leg.stop.add(makePlace(states[i], vertex, edges[i], currentStop, tripTimes, requestedLocale));
}
}
}
/**
* Make a {@link Place} to add to a {@link Leg}.
*
* @param state The {@link State} that the {@link Place} pertains to.
* @param vertex The {@link Vertex} at the {@link State}.
* @param edge The {@link Edge} leading out of the {@link Vertex}.
* @param stop The {@link Stop} associated with the {@link Vertex}.
* @param tripTimes The {@link TripTimes} associated with the {@link Leg}.
* @return The resulting {@link Place} object.
*/
private static Place makePlace(State state, Vertex vertex, Edge edge, Stop stop, TripTimes tripTimes, Locale requestedLocale) {
// If no edge was given, it means we're at the end of this leg and need to work around that.
boolean endOfLeg = (edge == null);
String name = vertex.getName(requestedLocale);
//This gets nicer names instead of osm:node:id when changing mode of transport
//Names are generated from all the streets in a corner, same as names in origin and destination
//We use name in TemporaryStreetLocation since this name generation already happened when temporary location was generated
if (vertex instanceof StreetVertex && !(vertex instanceof TemporaryStreetLocation)) {
name = ((StreetVertex) vertex).getIntersectionName(requestedLocale).toString(requestedLocale);
}
Place place = new Place(vertex.getX(), vertex.getY(), name,
makeCalendar(state), makeCalendar(state));
if (endOfLeg) edge = state.getBackEdge();
if (vertex instanceof TransitVertex && edge instanceof OnboardEdge) {
place.stopId = stop.getId();
place.stopCode = stop.getCode();
place.platformCode = stop.getPlatformCode();
place.zoneId = stop.getZoneId();
place.stopIndex = ((OnboardEdge) edge).getStopIndex();
if (endOfLeg) place.stopIndex++;
if (tripTimes != null) {
place.stopSequence = tripTimes.getStopSequence(place.stopIndex);
}
place.vertexType = VertexType.TRANSIT;
} else if(vertex instanceof BikeRentalStationVertex) {
place.bikeShareId = ((BikeRentalStationVertex) vertex).getId();
LOG.trace("Added bike share Id {} to place", place.bikeShareId);
place.vertexType = VertexType.BIKESHARE;
} else if (vertex instanceof BikeParkVertex) {
place.vertexType = VertexType.BIKEPARK;
} else {
place.vertexType = VertexType.NORMAL;
}
return place;
}
/**
* Add information about real-time data to a {@link Leg}.
*
* @param leg The leg to add the real-time information to
* @param states The states that go with the leg
*/
private static void addRealTimeData(Leg leg, State[] states) {
TripTimes tripTimes = states[states.length - 1].getTripTimes();
if (tripTimes != null && !tripTimes.isScheduled()) {
leg.realTime = true;
if (leg.from.stopIndex != null) {
leg.departureDelay = tripTimes.getDepartureDelay(leg.from.stopIndex);
}
leg.arrivalDelay = tripTimes.getArrivalDelay(leg.to.stopIndex);
}
}
/**
* Converts a list of street edges to a list of turn-by-turn directions.
*
* @param previous a non-transit leg that immediately precedes this one (bike-walking, say), or null
*
* @return
*/
public static List generateWalkSteps(Graph graph, State[] states, WalkStep previous, Locale requestedLocale) {
List steps = new ArrayList();
WalkStep step = null;
double lastAngle = 0, distance = 0; // distance used for appending elevation profiles
int roundaboutExit = 0; // track whether we are in a roundabout, and if so the exit number
String roundaboutPreviousStreet = null;
State onBikeRentalState = null, offBikeRentalState = null;
// Check if this leg is a SimpleTransfer; if so, rebuild state array based on stored transfer edges
if (states.length == 2 && states[1].getBackEdge() instanceof SimpleTransfer) {
SimpleTransfer transferEdge = ((SimpleTransfer) states[1].getBackEdge());
List transferEdges = transferEdge.getEdges();
if (transferEdges != null) {
// Create a new initial state. Some parameters may have change along the way, copy them from the first state
StateEditor se = new StateEditor(states[0].getOptions(), transferEdges.get(0).getFromVertex());
se.setNonTransitOptionsFromState(states[0]);
State s = se.makeState();
ArrayList transferStates = new ArrayList<>();
transferStates.add(s);
for (Edge e : transferEdges) {
s = e.traverse(s);
transferStates.add(s);
}
states = transferStates.toArray(new State[transferStates.size()]);
}
}
for (int i = 0; i < states.length - 1; i++) {
State backState = states[i];
State forwardState = states[i + 1];
Edge edge = forwardState.getBackEdge();
if(edge instanceof RentABikeOnEdge) onBikeRentalState = forwardState;
if(edge instanceof RentABikeOffEdge) offBikeRentalState = forwardState;
boolean createdNewStep = false, disableZagRemovalForThisStep = false;
if (edge instanceof FreeEdge) {
continue;
}
if (forwardState.getBackMode() == null || !forwardState.getBackMode().isOnStreetNonTransit()) {
continue; // ignore STLs and the like
}
Geometry geom = edge.getGeometry();
if (geom == null) {
continue;
}
// generate a step for getting off an elevator (all
// elevator narrative generation occurs when alighting). We don't need to know what came
// before or will come after
if (edge instanceof ElevatorAlightEdge) {
// don't care what came before or comes after
step = createWalkStep(graph, forwardState, requestedLocale);
createdNewStep = true;
disableZagRemovalForThisStep = true;
// tell the user where to get off the elevator using the exit notation, so the
// i18n interface will say 'Elevator to '
// what happens is that the webapp sees name == null and ignores that, and it sees
// exit != null and uses to
// the floor name is the AlightEdge name
// reset to avoid confusion with 'Elevator on floor 1 to floor 1'
step.streetName = ((ElevatorAlightEdge) edge).getName(requestedLocale);
step.relativeDirection = RelativeDirection.ELEVATOR;
steps.add(step);
continue;
}
String streetName = edge.getName(requestedLocale);
int idx = streetName.indexOf('(');
String streetNameNoParens;
if (idx > 0)
streetNameNoParens = streetName.substring(0, idx - 1);
else
streetNameNoParens = streetName;
if (step == null) {
// first step
step = createWalkStep(graph, forwardState, requestedLocale);
createdNewStep = true;
steps.add(step);
double thisAngle = DirectionUtils.getFirstAngle(geom);
if (previous == null) {
step.setAbsoluteDirection(thisAngle);
step.relativeDirection = RelativeDirection.DEPART;
} else {
step.setDirections(previous.angle, thisAngle, false);
}
// new step, set distance to length of first edge
distance = edge.getDistance();
} else if (((step.streetName != null && !step.streetNameNoParens().equals(streetNameNoParens))
&& (!step.bogusName || !edge.hasBogusName())) ||
edge.isRoundabout() != (roundaboutExit > 0) || // went on to or off of a roundabout
isLink(edge) && !isLink(backState.getBackEdge())) {
// Street name has changed, or we've gone on to or off of a roundabout.
if (roundaboutExit > 0) {
// if we were just on a roundabout,
// make note of which exit was taken in the existing step
step.exit = Integer.toString(roundaboutExit); // ordinal numbers from
if (streetNameNoParens.equals(roundaboutPreviousStreet)) {
step.stayOn = true;
}
roundaboutExit = 0;
}
/* start a new step */
step = createWalkStep(graph, forwardState, requestedLocale);
createdNewStep = true;
steps.add(step);
if (edge.isRoundabout()) {
// indicate that we are now on a roundabout
// and use one-based exit numbering
roundaboutExit = 1;
roundaboutPreviousStreet = backState.getBackEdge().getName(requestedLocale);
idx = roundaboutPreviousStreet.indexOf('(');
if (idx > 0)
roundaboutPreviousStreet = roundaboutPreviousStreet.substring(0, idx - 1);
}
double thisAngle = DirectionUtils.getFirstAngle(geom);
step.setDirections(lastAngle, thisAngle, edge.isRoundabout());
// new step, set distance to length of first edge
distance = edge.getDistance();
} else {
/* street name has not changed */
double thisAngle = DirectionUtils.getFirstAngle(geom);
RelativeDirection direction = WalkStep.getRelativeDirection(lastAngle, thisAngle,
edge.isRoundabout());
boolean optionsBefore = backState.multipleOptionsBefore();
if (edge.isRoundabout()) {
// we are on a roundabout, and have already traversed at least one edge of it.
if (optionsBefore) {
// increment exit count if we passed one.
roundaboutExit += 1;
}
}
if (edge.isRoundabout() || direction == RelativeDirection.CONTINUE) {
// we are continuing almost straight, or continuing along a roundabout.
// just append elevation info onto the existing step.
} else {
// we are not on a roundabout, and not continuing straight through.
// figure out if there were other plausible turn options at the last
// intersection
// to see if we should generate a "left to continue" instruction.
boolean shouldGenerateContinue = false;
if (edge instanceof StreetEdge) {
// the next edges will be PlainStreetEdges, we hope
double angleDiff = getAbsoluteAngleDiff(thisAngle, lastAngle);
for (Edge alternative : backState.getVertex().getOutgoingStreetEdges()) {
if (alternative.getName(requestedLocale).equals(streetName)) {
// alternatives that have the same name
// are usually caused by street splits
continue;
}
double altAngle = DirectionUtils.getFirstAngle(alternative
.getGeometry());
double altAngleDiff = getAbsoluteAngleDiff(altAngle, lastAngle);
if (angleDiff > Math.PI / 4 || altAngleDiff - angleDiff < Math.PI / 16) {
shouldGenerateContinue = true;
break;
}
}
} else {
double angleDiff = getAbsoluteAngleDiff(lastAngle, thisAngle);
// FIXME: this code might be wrong with the removal of the edge-based graph
State twoStatesBack = backState.getBackState();
Vertex backVertex = twoStatesBack.getVertex();
for (Edge alternative : backVertex.getOutgoingStreetEdges()) {
List alternatives = alternative.getToVertex()
.getOutgoingStreetEdges();
if (alternatives.size() == 0) {
continue; // this is not an alternative
}
alternative = alternatives.get(0);
if (alternative.getName(requestedLocale).equals(streetName)) {
// alternatives that have the same name
// are usually caused by street splits
continue;
}
double altAngle = DirectionUtils.getFirstAngle(alternative
.getGeometry());
double altAngleDiff = getAbsoluteAngleDiff(altAngle, lastAngle);
if (angleDiff > Math.PI / 4 || altAngleDiff - angleDiff < Math.PI / 16) {
shouldGenerateContinue = true;
break;
}
}
}
if (shouldGenerateContinue) {
// turn to stay on same-named street
step = createWalkStep(graph, forwardState, requestedLocale);
createdNewStep = true;
steps.add(step);
step.setDirections(lastAngle, thisAngle, false);
step.stayOn = true;
// new step, set distance to length of first edge
distance = edge.getDistance();
}
}
}
State exitState = backState;
Edge exitEdge = exitState.getBackEdge();
while (exitEdge instanceof FreeEdge) {
exitState = exitState.getBackState();
exitEdge = exitState.getBackEdge();
}
if (exitState.getVertex() instanceof ExitVertex) {
step.exit = ((ExitVertex) exitState.getVertex()).getExitName();
}
if (createdNewStep && !disableZagRemovalForThisStep && forwardState.getBackMode() == backState.getBackMode()) {
//check last three steps for zag
int last = steps.size() - 1;
if (last >= 2) {
WalkStep threeBack = steps.get(last - 2);
WalkStep twoBack = steps.get(last - 1);
WalkStep lastStep = steps.get(last);
if (twoBack.distance < MAX_ZAG_DISTANCE
&& lastStep.streetNameNoParens().equals(threeBack.streetNameNoParens())) {
if (((lastStep.relativeDirection == RelativeDirection.RIGHT ||
lastStep.relativeDirection == RelativeDirection.HARD_RIGHT) &&
(twoBack.relativeDirection == RelativeDirection.RIGHT ||
twoBack.relativeDirection == RelativeDirection.HARD_RIGHT)) ||
((lastStep.relativeDirection == RelativeDirection.LEFT ||
lastStep.relativeDirection == RelativeDirection.HARD_LEFT) &&
(twoBack.relativeDirection == RelativeDirection.LEFT ||
twoBack.relativeDirection == RelativeDirection.HARD_LEFT))) {
// in this case, we have two left turns or two right turns in quick
// succession; this is probably a U-turn.
steps.remove(last - 1);
lastStep.distance += twoBack.distance;
// A U-turn to the left, typical in the US.
if (lastStep.relativeDirection == RelativeDirection.LEFT ||
lastStep.relativeDirection == RelativeDirection.HARD_LEFT)
lastStep.relativeDirection = RelativeDirection.UTURN_LEFT;
else
lastStep.relativeDirection = RelativeDirection.UTURN_RIGHT;
// in this case, we're definitely staying on the same street
// (since it's zag removal, the street names are the same)
lastStep.stayOn = true;
}
else {
// What is a zag? TODO write meaningful documentation for this.
// It appears to mean simplifying out several rapid turns in succession
// from the description.
// total hack to remove zags.
steps.remove(last);
steps.remove(last - 1);
step = threeBack;
step.distance += twoBack.distance;
distance += step.distance;
if (twoBack.elevation != null) {
if (step.elevation == null) {
step.elevation = twoBack.elevation;
} else {
for (P2 d : twoBack.elevation) {
step.elevation.add(new P2(d.first + step.distance, d.second));
}
}
}
}
}
}
} else {
if (!createdNewStep && step.elevation != null) {
List> s = encodeElevationProfile(edge, distance,
backState.getOptions().geoidElevation ? -graph.ellipsoidToGeoidDifference : 0);
if (step.elevation != null && step.elevation.size() > 0) {
step.elevation.addAll(s);
} else {
step.elevation = s;
}
}
distance += edge.getDistance();
}
// increment the total length for this step
step.distance += edge.getDistance();
step.addAlerts(graph.streetNotesService.getNotes(forwardState), requestedLocale);
lastAngle = DirectionUtils.getLastAngle(geom);
step.edges.add(edge);
}
// add bike rental information if applicable
if(onBikeRentalState != null && !steps.isEmpty()) {
steps.get(steps.size()-1).bikeRentalOnStation =
new BikeRentalStationInfo((BikeRentalStationVertex) onBikeRentalState.getBackEdge().getToVertex());
}
if(offBikeRentalState != null && !steps.isEmpty()) {
steps.get(0).bikeRentalOffStation =
new BikeRentalStationInfo((BikeRentalStationVertex) offBikeRentalState.getBackEdge().getFromVertex());
}
return steps;
}
private static boolean isLink(Edge edge) {
return edge instanceof StreetEdge && (((StreetEdge)edge).getStreetClass() & StreetEdge.CLASS_LINK) == StreetEdge.CLASS_LINK;
}
private static double getAbsoluteAngleDiff(double thisAngle, double lastAngle) {
double angleDiff = thisAngle - lastAngle;
if (angleDiff < 0) {
angleDiff += Math.PI * 2;
}
double ccwAngleDiff = Math.PI * 2 - angleDiff;
if (ccwAngleDiff < angleDiff) {
angleDiff = ccwAngleDiff;
}
return angleDiff;
}
private static WalkStep createWalkStep(Graph graph, State s, Locale wantedLocale) {
Edge en = s.getBackEdge();
WalkStep step;
step = new WalkStep();
step.streetName = en.getName(wantedLocale);
step.lon = en.getFromVertex().getX();
step.lat = en.getFromVertex().getY();
step.elevation = encodeElevationProfile(s.getBackEdge(), 0,
s.getOptions().geoidElevation ? -graph.ellipsoidToGeoidDifference : 0);
step.bogusName = en.hasBogusName();
step.addAlerts(graph.streetNotesService.getNotes(s), wantedLocale);
step.angle = DirectionUtils.getFirstAngle(s.getBackEdge().getGeometry());
if (s.getBackEdge() instanceof AreaEdge) {
step.area = true;
}
return step;
}
private static List> encodeElevationProfile(Edge edge, double distanceOffset, double heightOffset) {
if (!(edge instanceof StreetEdge)) {
return new ArrayList>();
}
StreetEdge elevEdge = (StreetEdge) edge;
if (elevEdge.getElevationProfile() == null) {
return new ArrayList>();
}
ArrayList> out = new ArrayList>();
Coordinate[] coordArr = elevEdge.getElevationProfile().toCoordinateArray();
for (int i = 0; i < coordArr.length; i++) {
out.add(new P2(coordArr[i].x + distanceOffset, coordArr[i].y + heightOffset));
}
return out;
}
}
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