protected static boolean isTileVisible(
      DrawContext dc, Tile tile, double minDistanceSquared, double maxDistanceSquared) {
    if (!tile.getSector().intersects(dc.getVisibleSector())) return false;

    View view = dc.getView();
    Position eyePos = view.getEyePosition();
    if (eyePos == null) return false;

    Angle lat =
        clampAngle(
            eyePos.getLatitude(),
            tile.getSector().getMinLatitude(),
            tile.getSector().getMaxLatitude());
    Angle lon =
        clampAngle(
            eyePos.getLongitude(),
            tile.getSector().getMinLongitude(),
            tile.getSector().getMaxLongitude());
    Vec4 p = dc.getGlobe().computePointFromPosition(lat, lon, 0d);
    double distSquared = dc.getView().getEyePoint().distanceToSquared3(p);
    //noinspection RedundantIfStatement
    if (minDistanceSquared > distSquared || maxDistanceSquared < distSquared) return false;

    return true;
  }
  protected void movePolygon(Point previousMousePoint, Point mousePoint) {
    // Intersect a ray through each mouse point, with a geoid passing through the reference
    // elevation.
    // If either ray fails to intersect the geoid, then ignore this event. Use the difference
    // between the two
    // intersected positions to move the control point's location.

    View view = this.wwd.getView();
    Globe globe = this.wwd.getModel().getGlobe();

    Position refPos = this.polygon.getReferencePosition();
    if (refPos == null) return;

    Line ray = view.computeRayFromScreenPoint(mousePoint.getX(), mousePoint.getY());
    Line previousRay =
        view.computeRayFromScreenPoint(previousMousePoint.getX(), previousMousePoint.getY());

    Vec4 vec = AirspaceEditorUtil.intersectGlobeAt(this.wwd, refPos.getElevation(), ray);
    Vec4 previousVec =
        AirspaceEditorUtil.intersectGlobeAt(this.wwd, refPos.getElevation(), previousRay);

    if (vec == null || previousVec == null) {
      return;
    }

    Position pos = globe.computePositionFromPoint(vec);
    Position previousPos = globe.computePositionFromPoint(previousVec);
    LatLon change = pos.subtract(previousPos);

    this.polygon.move(new Position(change.getLatitude(), change.getLongitude(), 0.0));
  }
Exemple #3
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  /**
   * Compute the lat/lon position of the view center
   *
   * @param dc the current DrawContext
   * @param view the current View
   * @return the ground position of the view center or null
   */
  protected Position computeGroundPosition(DrawContext dc, View view) {
    if (view == null) return null;

    Position groundPos =
        view.computePositionFromScreenPoint(
            view.getViewport().getWidth() / 2, view.getViewport().getHeight() / 2);
    if (groundPos == null) return null;

    double elevation =
        dc.getGlobe().getElevation(groundPos.getLatitude(), groundPos.getLongitude());
    return new Position(
        groundPos.getLatitude(),
        groundPos.getLongitude(),
        elevation * dc.getVerticalExaggeration());
  }
  private boolean needToSplit(DrawContext dc, Sector sector) {
    Vec4[] corners = sector.computeCornerPoints(dc.getGlobe(), dc.getVerticalExaggeration());
    Vec4 centerPoint = sector.computeCenterPoint(dc.getGlobe(), dc.getVerticalExaggeration());

    View view = dc.getView();
    double d1 = view.getEyePoint().distanceTo3(corners[0]);
    double d2 = view.getEyePoint().distanceTo3(corners[1]);
    double d3 = view.getEyePoint().distanceTo3(corners[2]);
    double d4 = view.getEyePoint().distanceTo3(corners[3]);
    double d5 = view.getEyePoint().distanceTo3(centerPoint);

    double minDistance = d1;
    if (d2 < minDistance) minDistance = d2;
    if (d3 < minDistance) minDistance = d3;
    if (d4 < minDistance) minDistance = d4;
    if (d5 < minDistance) minDistance = d5;

    double cellSize =
        (Math.PI * sector.getDeltaLatRadians() * dc.getGlobe().getRadius()) / 20; // TODO

    return !(Math.log10(cellSize) <= (Math.log10(minDistance) - this.splitScale));
  }
  protected void moveControlPoint(
      ControlPointMarker controlPoint, Point lastMousePoint, Point moveToPoint) {
    View view = this.wwd.getView();
    Globe globe = this.wwd.getModel().getGlobe();

    Position refPos = controlPoint.getPosition();
    if (refPos == null) return;

    Line ray = view.computeRayFromScreenPoint(moveToPoint.getX(), moveToPoint.getY());
    Line previousRay = view.computeRayFromScreenPoint(lastMousePoint.getX(), lastMousePoint.getY());

    Vec4 vec = AirspaceEditorUtil.intersectGlobeAt(this.wwd, refPos.getElevation(), ray);
    Vec4 previousVec =
        AirspaceEditorUtil.intersectGlobeAt(this.wwd, refPos.getElevation(), previousRay);

    if (vec == null || previousVec == null) {
      return;
    }

    Position pos = globe.computePositionFromPoint(vec);
    Position previousPos = globe.computePositionFromPoint(previousVec);
    LatLon change = pos.subtract(previousPos);

    java.util.List<LatLon> boundary = new ArrayList<LatLon>();
    for (LatLon ll : this.polygon.getOuterBoundary()) {
      boundary.add(ll);
    }

    boundary.set(controlPoint.getIndex(), new Position(pos.add(change), refPos.getAltitude()));

    // ExtrudedPolygon ensures that the last boundary position is the same as the first. Remove the
    // last point
    // before setting the boundary.
    boundary.remove(boundary.size() - 1);

    this.polygon.setOuterBoundary(boundary);
  }
    protected boolean isNavSectorVisible(
        DrawContext dc, double minDistanceSquared, double maxDistanceSquared) {
      if (!navSector.intersects(dc.getVisibleSector())) return false;

      View view = dc.getView();
      Position eyePos = view.getEyePosition();
      if (eyePos == null) return false;

      // check for eyePos over globe
      if (Double.isNaN(eyePos.getLatitude().getDegrees())
          || Double.isNaN(eyePos.getLongitude().getDegrees())) return false;

      Angle lat =
          clampAngle(eyePos.getLatitude(), navSector.getMinLatitude(), navSector.getMaxLatitude());
      Angle lon =
          clampAngle(
              eyePos.getLongitude(), navSector.getMinLongitude(), navSector.getMaxLongitude());
      Vec4 p = dc.getGlobe().computePointFromPosition(lat, lon, 0d);
      double distSquared = dc.getView().getEyePoint().distanceToSquared3(p);
      //noinspection RedundantIfStatement
      if (minDistanceSquared > distSquared || maxDistanceSquared < distSquared) return false;

      return true;
    }