/**
   * {@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);
    }
  }
示例#2
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  /**
   * {@inheritDoc}
   *
   * @param positions Control points that orient the graphic. Must provide at least three points.
   */
  public void setPositions(Iterable<? extends Position> positions) {
    if (positions == null) {
      String message = Logging.getMessage("nullValue.PositionsListIsNull");
      Logging.logger().severe(message);
      throw new IllegalArgumentException(message);
    }

    try {
      Iterator<? extends Position> iterator = positions.iterator();
      this.position1 = iterator.next();
      this.position2 = iterator.next();
      this.position3 = iterator.next();
    } catch (NoSuchElementException e) {
      String message = Logging.getMessage("generic.InsufficientPositions");
      Logging.logger().severe(message);
      throw new IllegalArgumentException(message);
    }

    this.paths = null; // Need to recompute path for the new control points
    this.arrowHead1 = null;
    this.arrowHead2 = null;

    if (this.symbol != null) {
      this.symbol.setPosition(this.position1);
    }
  }
  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);
  }
 /** {@inheritDoc} */
 @Override
 public void setModifier(String modifier, Object value) {
   if (SymbologyConstants.DISTANCE.equals(modifier)) {
     if (value instanceof Double) {
       this.setWidth((Double) value);
     } else if (value instanceof Iterable) {
       // Only use the first value of the iterable. This graphic uses two control points and a
       // width.
       Iterator iterator = ((Iterable) value).iterator();
       this.setWidth((Double) iterator.next());
     }
   } else {
     super.setModifier(modifier, value);
   }
 }