private void adjustDateLineCrossingPoints() {
      ArrayList<LatLon> corners = new ArrayList<LatLon>(Arrays.asList(sw, se, nw, ne));
      if (!LatLon.locationsCrossDateLine(corners)) return;

      double lonSign = 0;
      for (LatLon corner : corners) {
        if (Math.abs(corner.getLongitude().degrees) != 180)
          lonSign = Math.signum(corner.getLongitude().degrees);
      }

      if (lonSign == 0) return;

      if (Math.abs(sw.getLongitude().degrees) == 180
          && Math.signum(sw.getLongitude().degrees) != lonSign)
        sw = new Position(sw.getLatitude(), sw.getLongitude().multiply(-1), sw.getElevation());
      if (Math.abs(se.getLongitude().degrees) == 180
          && Math.signum(se.getLongitude().degrees) != lonSign)
        se = new Position(se.getLatitude(), se.getLongitude().multiply(-1), se.getElevation());
      if (Math.abs(nw.getLongitude().degrees) == 180
          && Math.signum(nw.getLongitude().degrees) != lonSign)
        nw = new Position(nw.getLatitude(), nw.getLongitude().multiply(-1), nw.getElevation());
      if (Math.abs(ne.getLongitude().degrees) == 180
          && Math.signum(ne.getLongitude().degrees) != lonSign)
        ne = new Position(ne.getLatitude(), ne.getLongitude().multiply(-1), ne.getElevation());
    }
  /**
   * {@inheritDoc}
   *
   * @param positions Control points. This graphic uses only two control point, which determine the
   *     midpoints of two opposite sides of the quad. See Fire Support Area (2.X.4.3.2.1.2) on pg.
   *     652 of MIL-STD-2525C for an example of how these points are interpreted.
   */
  public void setPositions(Iterable<? extends Position> positions) {
    if (positions == null) {
      String message = Logging.getMessage("nullValue.PositionsListIsNull");
      Logging.logger().severe(message);
      throw new IllegalArgumentException(message);
    }

    Iterator<? extends Position> iterator = positions.iterator();
    try {
      Position pos1 = iterator.next();
      Position pos2 = iterator.next();

      LatLon center = LatLon.interpolateGreatCircle(0.5, pos1, pos2);
      this.quad.setCenter(center);

      Angle heading = LatLon.greatCircleAzimuth(pos2, pos1);
      this.quad.setHeading(heading.subtract(Angle.POS90));

      this.positions = positions;
      this.shapeInvalid = true; // Need to recompute quad size
    } catch (NoSuchElementException e) {
      String message = Logging.getMessage("generic.InsufficientPositions");
      Logging.logger().severe(message);
      throw new IllegalArgumentException(message);
    }
  }
Exemple #3
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    private Info[] buildSurfaceShapes() {
      LatLon position = new LatLon(Angle.fromDegrees(38), Angle.fromDegrees(-105));

      ArrayList<LatLon> surfaceLinePositions = new ArrayList<LatLon>();
      //            surfaceLinePositions.add(LatLon.fromDegrees(37.8484, -119.9754));
      //            surfaceLinePositions.add(LatLon.fromDegrees(38.3540, -119.1526));

      //            surfaceLinePositions.add(new LatLon(Angle.fromDegrees(0),
      // Angle.fromDegrees(-150)));
      //            surfaceLinePositions.add(new LatLon(Angle.fromDegrees(60),
      // Angle.fromDegrees(0)));

      surfaceLinePositions.add(position);
      surfaceLinePositions.add(LatLon.fromDegrees(39, -104));
      surfaceLinePositions.add(LatLon.fromDegrees(39, -105));
      surfaceLinePositions.add(position);

      return new Info[] {
        new Info("Circle", new SurfaceCircle(position, 100e3)),
        new Info("Ellipse", new SurfaceEllipse(position, 100e3, 90e3, Angle.ZERO)),
        new Info("Square", new SurfaceSquare(position, 100e3)),
        new Info("Quad", new SurfaceQuad(position, 100e3, 60e3, Angle.ZERO)),
        new Info("Sector", new SurfaceSector(Sector.fromDegrees(38, 40, -105, -103))),
        new Info("Polygon", new SurfacePolygon(surfaceLinePositions)),
      };
    }
  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 #5
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  protected List<Position> computePathPositions(
      Position startPosition, Position endPosition, Angle delta) {
    Angle dist = LatLon.greatCircleDistance(startPosition, endPosition);
    dist = dist.multiply(0.6);

    Angle azimuth = LatLon.greatCircleAzimuth(startPosition, endPosition);

    LatLon locA = LatLon.greatCircleEndPosition(startPosition, azimuth.add(delta), dist);

    dist = dist.multiply(0.9);
    LatLon locB = LatLon.greatCircleEndPosition(startPosition, azimuth.subtract(delta), dist);

    return Arrays.asList(startPosition, new Position(locA, 0), new Position(locB, 0), endPosition);
  }
  protected void assembleVertexControlPoints(DrawContext dc) {
    Terrain terrain = dc.getTerrain();
    ExtrudedPolygon polygon = this.getPolygon();

    Position refPos = polygon.getReferencePosition();
    Vec4 refPoint = terrain.getSurfacePoint(refPos.getLatitude(), refPos.getLongitude(), 0);

    int altitudeMode = polygon.getAltitudeMode();
    double height = polygon.getHeight();

    Vec4 vaa = null;
    double vaaLength = 0; // used to compute independent length of each cap vertex
    double vaLength = 0;

    int i = 0;
    for (LatLon location : polygon.getOuterBoundary()) {
      Vec4 vert;

      // Compute the top/cap point.
      if (altitudeMode == WorldWind.CONSTANT || !(location instanceof Position)) {
        if (vaa == null) {
          // Compute the vector lengths of the top and bottom points at the reference position.
          vaa = refPoint.multiply3(height / refPoint.getLength3());
          vaaLength = vaa.getLength3();
          vaLength = refPoint.getLength3();
        }

        // Compute the bottom point, which is on the terrain.
        vert = terrain.getSurfacePoint(location.getLatitude(), location.getLongitude(), 0);

        double delta = vaLength - vert.dot3(refPoint) / vaLength;
        vert = vert.add3(vaa.multiply3(1d + delta / vaaLength));
      } else if (altitudeMode == WorldWind.RELATIVE_TO_GROUND) {
        vert =
            terrain.getSurfacePoint(
                location.getLatitude(),
                location.getLongitude(),
                ((Position) location).getAltitude());
      } else // WorldWind.ABSOLUTE
      {
        vert =
            terrain
                .getGlobe()
                .computePointFromPosition(
                    location.getLatitude(),
                    location.getLongitude(),
                    ((Position) location).getAltitude() * terrain.getVerticalExaggeration());
      }

      Position vertexPosition = this.wwd.getModel().getGlobe().computePositionFromPoint(vert);

      this.controlPoints.add(
          new ControlPointMarker(
              MOVE_VERTEX_ACTION, vertexPosition, vert, this.vertexControlAttributes, i));
      i++;
    }
  }
  protected void computeQuadSize(DrawContext dc) {
    if (this.positions == null) return;

    Iterator<? extends Position> iterator = this.positions.iterator();

    Position pos1 = iterator.next();
    Position pos2 = iterator.next();

    Angle angularDistance = LatLon.greatCircleDistance(pos1, pos2);
    double length = angularDistance.radians * dc.getGlobe().getRadius();

    this.quad.setWidth(length);
  }
Exemple #8
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  /**
   * Create the list of positions that describe the arrow.
   *
   * @param dc Current draw context.
   */
  protected void createShapes(DrawContext dc) {
    this.paths = new Path[2];

    int i = 0;

    Angle azimuth1 = LatLon.greatCircleAzimuth(this.position1, this.position2);
    Angle azimuth2 = LatLon.greatCircleAzimuth(this.position1, this.position3);

    Angle delta = azimuth2.subtract(azimuth1);
    int sign = delta.degrees > 0 ? 1 : -1;

    delta = Angle.fromDegrees(sign * 5.0);

    // Create a path for the line part of the arrow
    List<Position> positions = this.computePathPositions(this.position1, this.position2, delta);
    this.paths[i++] = this.createPath(positions);

    // Create a polygon to draw the arrow head.
    double arrowLength = this.getArrowLength();
    Angle arrowAngle = this.getArrowAngle();
    positions =
        this.computeArrowheadPositions(
            dc, positions.get(2), positions.get(3), arrowLength, arrowAngle);
    this.arrowHead1 = this.createPolygon(positions);
    this.arrowHead1.setLocations(positions);

    delta = delta.multiply(-1.0);
    positions = this.computePathPositions(this.position1, this.position3, delta);
    this.paths[i] = this.createPath(positions);

    positions =
        this.computeArrowheadPositions(
            dc, positions.get(2), positions.get(3), arrowLength, arrowAngle);
    this.arrowHead2 = this.createPolygon(positions);
    this.arrowHead2.setLocations(positions);
  }
Exemple #9
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 /**
  * Compute the view range footprint on the globe.
  *
  * @param dc the current <code>DrawContext</code>
  * @param steps the number of steps.
  * @return an array list of <code>LatLon</code> forming a closed shape.
  */
 protected ArrayList<LatLon> computeViewFootPrint(DrawContext dc, int steps) {
   ArrayList<LatLon> positions = new ArrayList<LatLon>();
   Position eyePos = dc.getView().getEyePosition();
   Angle distance =
       Angle.fromRadians(
           Math.asin(
               dc.getView().getFarClipDistance()
                   / (dc.getGlobe().getRadius() + eyePos.getElevation())));
   if (distance.degrees > 10) {
     double headStep = 360d / steps;
     Angle heading = Angle.ZERO;
     for (int i = 0; i <= steps; i++) {
       LatLon p = LatLon.greatCircleEndPosition(eyePos, heading, distance);
       positions.add(p);
       heading = heading.addDegrees(headStep);
     }
     return positions;
   } else return null;
 }
  /** {@inheritDoc} */
  @Override
  protected void determineLabelPositions(DrawContext dc) {
    Position center = this.getReferencePosition();
    if (center == null) return;

    // Position the labels along a line radiating out from the center of the circle. The angle (60
    // degrees) is
    // chosen to match the graphic template defined by MIL-STD-2525C, pg. 613.
    double globeRadius = dc.getGlobe().getRadius();

    Angle labelAngle = this.getLabelAngle();

    int i = 0;
    for (SurfaceCircle ring : this.rings) {
      double radius = ring.getRadius();

      LatLon ll = LatLon.greatCircleEndPosition(center, labelAngle.radians, radius / globeRadius);

      this.labels.get(i).setPosition(new Position(ll, 0));
      i += 1;
    }
  }
  /**
   * Create the circles used to draw this graphic.
   *
   * @param dc Current draw context.
   */
  protected void createShapes(DrawContext dc) {
    if (this.positions == null) return;

    this.rings = new ArrayList<SurfaceCircle>();

    Iterator<? extends Position> iterator = this.positions.iterator();

    Position center = iterator.next();
    double globeRadius = dc.getGlobe().getRadius();

    while (iterator.hasNext()) {
      SurfaceCircle ring = this.createCircle();
      ring.setCenter(center);

      Position pos = iterator.next();
      Angle radius = LatLon.greatCircleDistance(center, pos);

      double radiusMeters = radius.radians * globeRadius;
      ring.setRadius(radiusMeters);

      this.rings.add(ring);
    }
  }
Exemple #12
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  protected void drawIcon(DrawContext dc) {
    if (this.getIconFilePath() == null) return;

    GL gl = dc.getGL();
    OGLStackHandler ogsh = new OGLStackHandler();

    try {
      // Initialize texture if necessary
      Texture iconTexture = dc.getTextureCache().getTexture(this.getIconFilePath());
      if (iconTexture == null) {
        this.initializeTexture(dc);
        iconTexture = dc.getTextureCache().getTexture(this.getIconFilePath());
        if (iconTexture == null) {
          String msg = Logging.getMessage("generic.ImageReadFailed");
          Logging.logger().finer(msg);
          return;
        }
      }
      gl.glDisable(GL.GL_DEPTH_TEST);

      double width = this.getScaledIconWidth();
      double height = this.getScaledIconHeight();

      // Load a parallel projection with xy dimensions (viewportWidth, viewportHeight)
      // into the GL projection matrix.
      java.awt.Rectangle viewport = dc.getView().getViewport();
      ogsh.pushProjectionIdentity(gl);
      double maxwh = width > height ? width : height;
      gl.glOrtho(0d, viewport.width, 0d, viewport.height, -0.6 * maxwh, 0.6 * maxwh);

      // Translate and scale
      ogsh.pushModelviewIdentity(gl);
      double scale = this.computeScale(viewport);
      Vec4 locationSW = this.computeLocation(viewport, scale);
      gl.glTranslated(locationSW.x(), locationSW.y(), locationSW.z());
      // Scale to 0..1 space
      gl.glScaled(scale, scale, 1);
      gl.glScaled(width, height, 1d);

      if (!dc.isPickingMode()) {
        gl.glEnable(GL.GL_BLEND);
        gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);

        // Draw background color behind the map
        gl.glColor4ub(
            (byte) this.backColor.getRed(),
            (byte) this.backColor.getGreen(),
            (byte) this.backColor.getBlue(),
            (byte) (this.backColor.getAlpha() * this.getOpacity()));
        dc.drawUnitQuad();

        // Draw world map icon
        gl.glColor4d(1d, 1d, 1d, this.getOpacity());
        gl.glEnable(GL.GL_TEXTURE_2D);
        iconTexture.bind();

        TextureCoords texCoords = iconTexture.getImageTexCoords();
        dc.drawUnitQuad(texCoords);
        gl.glBindTexture(GL.GL_TEXTURE_2D, 0);
        gl.glDisable(GL.GL_TEXTURE_2D);

        // Draw crosshair for current location
        gl.glLoadIdentity();
        gl.glTranslated(locationSW.x(), locationSW.y(), locationSW.z());
        // Scale to width x height space
        gl.glScaled(scale, scale, 1);
        // Set color
        float[] colorRGB = this.color.getRGBColorComponents(null);
        gl.glColor4d(colorRGB[0], colorRGB[1], colorRGB[2], this.getOpacity());

        // Draw crosshair
        Position groundPos = this.computeGroundPosition(dc, dc.getView());
        if (groundPos != null) {
          int x = (int) (width * (groundPos.getLongitude().degrees + 180) / 360);
          int y = (int) (height * (groundPos.getLatitude().degrees + 90) / 180);
          int w = 10; // cross branch length
          // Draw
          gl.glBegin(GL.GL_LINE_STRIP);
          gl.glVertex3d(x - w, y, 0);
          gl.glVertex3d(x + w + 1, y, 0);
          gl.glEnd();
          gl.glBegin(GL.GL_LINE_STRIP);
          gl.glVertex3d(x, y - w, 0);
          gl.glVertex3d(x, y + w + 1, 0);
          gl.glEnd();
        }

        // Draw view footprint in map icon space
        if (this.showFootprint) {
          this.footPrintPositions = this.computeViewFootPrint(dc, 32);
          if (this.footPrintPositions != null) {
            gl.glBegin(GL.GL_LINE_STRIP);
            LatLon p1 = this.footPrintPositions.get(0);
            for (LatLon p2 : this.footPrintPositions) {
              int x = (int) (width * (p2.getLongitude().degrees + 180) / 360);
              int y = (int) (height * (p2.getLatitude().degrees + 90) / 180);
              // Draw
              if (LatLon.locationsCrossDateline(p1, p2)) {
                int y1 = (int) (height * (p1.getLatitude().degrees + 90) / 180);
                gl.glVertex3d(x < width / 2 ? width : 0, (y1 + y) / 2, 0);
                gl.glEnd();
                gl.glBegin(GL.GL_LINE_STRIP);
                gl.glVertex3d(x < width / 2 ? 0 : width, (y1 + y) / 2, 0);
              }
              gl.glVertex3d(x, y, 0);
              p1 = p2;
            }
            gl.glEnd();
          }
        }
        // Draw 1px border around and inside the map
        gl.glBegin(GL.GL_LINE_STRIP);
        gl.glVertex3d(0, 0, 0);
        gl.glVertex3d(width, 0, 0);
        gl.glVertex3d(width, height - 1, 0);
        gl.glVertex3d(0, height - 1, 0);
        gl.glVertex3d(0, 0, 0);
        gl.glEnd();
      } else {
        // Picking
        this.pickSupport.clearPickList();
        this.pickSupport.beginPicking(dc);
        // Where in the world are we picking ?
        Position pickPosition =
            computePickPosition(
                dc, locationSW, new Dimension((int) (width * scale), (int) (height * scale)));
        Color color = dc.getUniquePickColor();
        int colorCode = color.getRGB();
        this.pickSupport.addPickableObject(colorCode, this, pickPosition, false);
        gl.glColor3ub((byte) color.getRed(), (byte) color.getGreen(), (byte) color.getBlue());
        dc.drawUnitQuad();
        this.pickSupport.endPicking(dc);
        this.pickSupport.resolvePick(dc, dc.getPickPoint(), this);
      }
    } finally {
      dc.restoreDefaultDepthTesting();
      dc.restoreDefaultCurrentColor();
      if (dc.isPickingMode()) dc.restoreDefaultBlending();
      ogsh.pop(gl);
    }
  }