Examples with Position com.github.davidmoten.grumpy.core.Position used on opensource projects

Example 1 with Position

use of com.github.davidmoten.grumpy.core.Position in project risky by amsa-code.

the class DriftingLayer method render.

@Override
public void render(Graphics2D g, WmsRequest request) {
    log.info("request=" + request);
    log.info("drawing " + queue.size() + " positions");
    final Projector projector = WmsUtil.getProjector(request);
    Position a = projector.toPosition(0, 0);
    Position b = projector.toPosition(request.getWidth(), request.getHeight());
    Rectangle r = Geometries.rectangle(a.getLon(), b.getLat(), b.getLon(), a.getLat());
    Optional<VesselPosition> last = Optional.empty();
    Optional<Point> lastPoint = Optional.empty();
    // Iterable<VesselPosition> positions = tree
    // .search(r)
    // .map(new Func1<Entry<VesselPosition,
    // com.github.davidmoten.rtree.geometry.Point>, VesselPosition>() {
    // 
    // @Override
    // public VesselPosition call(
    // Entry<VesselPosition, com.github.davidmoten.rtree.geometry.Point>
    // entry) {
    // return entry.value();
    // }
    // 
    // }).toBlocking().toIterable();
    ConcurrentLinkedQueue<VesselPosition> positions = queue;
    Point startPoint = null;
    for (VesselPosition p : positions) {
        // expecting positions to be in mmsi, time order
        Point point = projector.toPoint(p.lat(), p.lon());
        if (last.isPresent() && p.id().equals(last.get().id()) && p.data().isPresent() && !p.data().get().equals(p.time()) && isOkMovement(p, last.get())) {
            // join the last position with this one with a line
            g.setColor(Color.gray);
            g.drawLine(lastPoint.get().x, lastPoint.get().y, point.x, point.y);
        }
        if (p.data().get().equals(p.time()) || (last.isPresent() && !isOkMovement(p, last.get()))) {
            g.setColor(Color.red);
            g.drawRect(point.x, point.y, 1, 1);
            startPoint = point;
        } else if (startPoint != null) {
            // draw intermediate point
            g.setColor(Color.darkGray);
            g.drawRect(point.x, point.y, 1, 1);
            // redraw startPoint so that a slightly moving drift doesn't
            // overdraw the startPoint with the color of an intermediate
            // point
            g.setColor(Color.red);
            g.drawRect(startPoint.x, startPoint.y, 1, 1);
        }
        last = Optional.of(p);
        lastPoint = Optional.of(point);
    }
    log.info("drawn");
}

Example 2 with Position

use of com.github.davidmoten.grumpy.core.Position in project risky by amsa-code.

the class ShapefileUtil method findRegionCrossingPoint.

public static TimedPosition findRegionCrossingPoint(Shapefile region, Fix fix1, Fix fix2) {
    Coordinate[] coords = new Coordinate[] { new Coordinate(fix1.lon(), fix1.lat()), new Coordinate(fix2.lon(), fix2.lat()) };
    LineString line = new GeometryFactory().createLineString(coords);
    for (PreparedGeometry g : region.geometries()) {
        if (g.crosses(line)) {
            Geometry intersection = g.getGeometry().intersection(line);
            // expecting just one point
            Coordinate coord = intersection.getCoordinate();
            double longitude = coord.x;
            double latitude = coord.y;
            Position a = Position.create(fix1.lat(), fix1.lon());
            Position b = Position.create(fix2.lat(), fix2.lon());
            Position c = Position.create(latitude, longitude);
            double ac = a.getDistanceToKm(c);
            double bc = b.getDistanceToKm(c);
            if (ac == 0) {
                return new TimedPosition(fix1.lat(), fix1.lon(), fix1.time());
            } else if (bc == 0) {
                return new TimedPosition(fix2.lat(), fix2.lon(), fix2.time());
            } else {
                // predict the timestamp based on distance from a and b
                long diff = fix2.time() - fix1.time();
                long t = Math.round(fix1.time() + ac * diff / (ac + bc));
                return new TimedPosition(latitude, longitude, t);
            }
        }
    }
    throw new RuntimeException("crossing not found");
}