Пример #1
0
 private Set<Alert> addNotesToLeg(Leg leg, EdgeNarrative edgeNarrative) {
   Set<Alert> notes = edgeNarrative.getNotes();
   if (notes != null) {
     for (Alert note : notes) {
       leg.addAlert(note);
     }
   }
   return notes;
 }
Пример #2
0
 private WalkStep createWalkStep(State s) {
   EdgeNarrative en = s.getBackEdgeNarrative();
   WalkStep step;
   step = new WalkStep();
   step.streetName = en.getName();
   step.lon = en.getFromVertex().getX();
   step.lat = en.getFromVertex().getY();
   step.elevation = encodeElevationProfile(s.getBackEdge(), 0);
   step.bogusName = en.hasBogusName();
   step.addAlerts(en.getNotes());
   return step;
 }
Пример #3
0
  /**
   * Converts a list of street edges to a list of turn-by-turn directions.
   *
   * @param edges : A list of street edges
   * @return
   */
  private List<WalkStep> getWalkSteps(List<State> states) {
    List<WalkStep> steps = new ArrayList<WalkStep>();
    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;

    for (State currState : states) {
      State backState = currState.getBackState();
      Edge edge = currState.getBackEdge();
      EdgeNarrative edgeNarrative = currState.getBackEdgeNarrative();
      boolean createdNewStep = false;
      if (edge instanceof FreeEdge) {
        continue;
      }
      if (!edgeNarrative.getMode().isOnStreetNonTransit()) {
        continue; // ignore STLs and the like
      }
      Geometry geom = edgeNarrative.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(currState);

        // tell the user where to get off the elevator using the exit notation, so the
        // i18n interface will say 'Elevator to <exit>'
        // what happens is that the webapp sees name == null and ignores that, and it sees
        // exit != null and uses to <exit>
        // the floor name is the AlightEdge name
        // reset to avoid confusion with 'Elevator on floor 1 to floor 1'
        step.streetName = ((ElevatorAlightEdge) edge).getName();

        step.relativeDirection = RelativeDirection.ELEVATOR;

        steps.add(step);
        continue;
      }

      String streetName = edgeNarrative.getName();
      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(currState);
        createdNewStep = true;

        steps.add(step);
        double thisAngle = DirectionUtils.getFirstAngle(geom);
        step.setAbsoluteDirection(thisAngle);
        // new step, set distance to length of first edge
        distance = edgeNarrative.getDistance();
      } else if ((step.streetName != null && !step.streetNameNoParens().equals(streetNameNoParens))
          && (!step.bogusName || !edgeNarrative.hasBogusName())) {
        /* street name has changed */
        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;
          }
          // localization
          roundaboutExit = 0;
        }
        /* start a new step */
        step = createWalkStep(currState);
        createdNewStep = true;

        steps.add(step);
        if (edgeNarrative.isRoundabout()) {
          // indicate that we are now on a roundabout
          // and use one-based exit numbering
          roundaboutExit = 1;
          roundaboutPreviousStreet = backState.getBackEdgeNarrative().getName();
          idx = roundaboutPreviousStreet.indexOf('(');
          if (idx > 0) roundaboutPreviousStreet = roundaboutPreviousStreet.substring(0, idx - 1);
        }
        double thisAngle = DirectionUtils.getFirstAngle(geom);
        step.setDirections(lastAngle, thisAngle, edgeNarrative.isRoundabout());
        // new step, set distance to length of first edge
        distance = edgeNarrative.getDistance();
      } else {
        /* street name has not changed */
        double thisAngle = DirectionUtils.getFirstAngle(geom);
        RelativeDirection direction =
            WalkStep.getRelativeDirection(lastAngle, thisAngle, edgeNarrative.isRoundabout());
        boolean optionsBefore = backState.multipleOptionsBefore();
        if (edgeNarrative.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 (edgeNarrative.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 PlainStreetEdge) {
            // the next edges will be TinyTurnEdges or PlainStreetEdges, we hope
            double angleDiff = getAbsoluteAngleDiff(thisAngle, lastAngle);
            for (Edge alternative : backState.getVertex().getOutgoingStreetEdges()) {
              if (alternative instanceof TinyTurnEdge) {
                // a tiny turn edge has no geometry, but the next
                // edge will be a TurnEdge or PSE and will have direction
                alternative = alternative.getToVertex().getOutgoingStreetEdges().get(0);
              }
              if (alternative.getName().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 if (edge instanceof TinyTurnEdge) {
            // do nothing as this will be handled in other cases
          } else {
            double angleDiff = getAbsoluteAngleDiff(lastAngle, thisAngle);
            // in the case of a turn edge, we actually have to go back two steps to see
            // where
            // else we might be, as once we are on the streetvertex leading into this
            // edge,
            // we are stuck
            State twoStatesBack = backState.getBackState();
            Vertex backVertex = twoStatesBack.getVertex();
            for (Edge alternative : backVertex.getOutgoingStreetEdges()) {
              List<Edge> alternatives = alternative.getToVertex().getOutgoingStreetEdges();
              if (alternatives.size() == 0) {
                continue; // this is not an alternative
              }
              alternative = alternatives.get(0);
              if (alternative.getName().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(currState);
            createdNewStep = true;
            steps.add(step);
            step.setDirections(lastAngle, thisAngle, false);
            step.stayOn = true;
            // new step, set distance to length of first edge
            distance = edgeNarrative.getDistance();
          }
        }
      }

      if (createdNewStep) {
        // 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())) {
            // total hack to remove zags.
            steps.remove(last);
            steps.remove(last - 1);
            step = threeBack;
            step.distance += twoBack.distance;
            if (twoBack.elevation != null) {
              if (step.elevation == null) {
                step.elevation = twoBack.elevation;
              } else {
                for (P2<Double> d : twoBack.elevation) {
                  step.elevation.add(new P2<Double>(d.getFirst() + step.distance, d.getSecond()));
                }
              }
            }
          }
        }
      } else {
        if (step.elevation != null) {
          List<P2<Double>> s = encodeElevationProfile(edge, distance);
          if (step.elevation != null && step.elevation.size() > 0) {
            step.elevation.addAll(s);
          } else {
            step.elevation = s;
          }
        }
        distance += edgeNarrative.getDistance();
      }

      // increment the total length for this step
      step.distance += edgeNarrative.getDistance();
      step.addAlerts(edgeNarrative.getNotes());
      lastAngle = DirectionUtils.getLastAngle(geom);
    }
    return steps;
  }