Ejemplo n.º 1
0
  /**
   * This returns true when the line between pt1 and pt2 crosses the seam. When the cone is
   * flattened, the "seam" is lon0 +- 180.
   *
   * @param pt1 point 1
   * @param pt2 point 2
   * @return true when the line between pt1 and pt2 crosses the seam.
   */
  public boolean crossSeam(ProjectionPoint pt1, ProjectionPoint pt2) {
    // either point is infinite
    if (ProjectionPointImpl.isInfinite(pt1) || ProjectionPointImpl.isInfinite(pt2)) return true;

    // opposite signed X values, larger then 5000 km
    return (pt1.getX() * pt2.getX() < 0) && (Math.abs(pt1.getX() - pt2.getX()) > 5000.0);
  }
Ejemplo n.º 2
0
  /**
   * Does the line between these two points cross the projection "seam".
   *
   * @param pt1 the line goes between these two points
   * @param pt2 the line goes between these two points
   * @return false if there is no seam
   */
  public boolean crossSeam(ProjectionPoint pt1, ProjectionPoint pt2) {
    // either point is infinite
    if (ProjectionPointImpl.isInfinite(pt1) || ProjectionPointImpl.isInfinite(pt2)) {
      return true;
    }

    // opposite signed long lines: LOOK ????
    return (pt1.getX() * pt2.getX() < 0);
  }
Ejemplo n.º 3
0
 void calcPos(AffineTransform w2n) {
   w2n.transform(
       new Point2D.Double(worldPos.getX(), worldPos.getY()),
       screenPos); // work in normalized coordinate space
   bbPos.setRect(
       screenPos.getX() + bb.getX(),
       screenPos.getY() + bb.getY(),
       bb.getWidth(),
       bb.getHeight());
 }
Ejemplo n.º 4
0
  /**
   * Convert a LatLonPoint to projection coordinates
   *
   * @param latLon convert from these lat, lon coordinates
   * @param result the object to write to
   * @return the given result
   */
  public ProjectionPoint latLonToProj(LatLonPoint latLon, ProjectionPointImpl result) {
    double toX, toY;
    double fromLat = latLon.getLatitude();
    double fromLon = latLon.getLongitude();
    double fromLat_r = Math.toRadians(fromLat);

    // infinite projection
    if ((Math.abs(90.0 - Math.abs(fromLat))) < TOLERANCE) {
      toX = Double.POSITIVE_INFINITY;
      toY = Double.POSITIVE_INFINITY;
    } else {
      toX = A * Math.toRadians(LatLonPointImpl.range180(fromLon - this.lon0));
      toY = A * SpecialMathFunction.atanh(Math.sin(fromLat_r)); // p 41 Snyder
    }

    result.setLocation(toX + falseEasting, toY + falseNorthing);
    return result;
  }
Ejemplo n.º 5
0
  /**
   * Convert a LatLonPoint to projection coordinates
   *
   * @param latLon convert from these lat, lon coordinates
   * @param result the object to write to
   * @return the given result
   */
  public ProjectionPoint latLonToProj(LatLonPoint latLon, ProjectionPointImpl result) {
    double toX, toY;
    double fromLat = latLon.getLatitude();
    double fromLon = latLon.getLongitude();

    fromLat = Math.toRadians(fromLat);
    double lonDiff = Math.toRadians(LatLonPointImpl.lonNormal(fromLon - lon0Degrees));
    double cosc = sinLat0 * Math.sin(fromLat) + cosLat0 * Math.cos(fromLat) * Math.cos(lonDiff);
    if (cosc >= 0) {
      toX = R * Math.cos(fromLat) * Math.sin(lonDiff);
      toY = R * (cosLat0 * Math.sin(fromLat) - sinLat0 * Math.cos(fromLat) * Math.cos(lonDiff));
    } else {
      toX = Double.POSITIVE_INFINITY;
      toY = Double.POSITIVE_INFINITY;
    }

    result.setLocation(toX, toY);
    return result;
  }