/** {@inheritDoc} */
public Position getReferencePosition() {
if (positions != null) {
Iterator<? extends Position> iterator = this.positions.iterator();
if (iterator.hasNext()) return iterator.next();
}
return null;
}
/**
* {@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);
}
}
/**
* {@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);
}
}
@Override
public Position getReferencePosition() {
if (this.boundaries.getContourCount() == 0) return null;
Iterator<? extends LatLon> iterator = this.boundaries.getContour(0).iterator();
if (!iterator.hasNext()) return null;
return new Position(iterator.next(), 0);
}
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);
}
}
/**
* Create positions that describe lines parallel to a control line.
*
* @param iterator Iterator of control line positions.
* @param leftPositions List to collect positions on the left line.
* @param rightPositions List to collect positions on the right line.
* @param halfWidth Distance from the center line to the left or right lines.
* @param globe Current globe.
*/
public void generateParallelLines(
Iterator<? extends Position> iterator,
List<Position> leftPositions,
List<Position> rightPositions,
double halfWidth,
Globe globe) {
// Starting at the start of the line, take points three at a time. B is the current control
// point, A is the next
// point in the line, and C is the previous point. We need to a find a vector that bisects angle
// ABC.
// B
// ---------> C
// /
// /
// /
// A /
Position posB = iterator.next();
Position posA = iterator.next();
Vec4 ptA = globe.computePointFromLocation(posA);
Vec4 ptB = globe.computePointFromLocation(posB);
Vec4 ptC;
// Compute side points at the start of the line.
this.generateParallelPoints(ptB, null, ptA, leftPositions, rightPositions, halfWidth, globe);
while (iterator.hasNext()) {
posA = iterator.next();
ptC = ptB;
ptB = ptA;
ptA = globe.computePointFromLocation(posA);
generateParallelPoints(ptB, ptC, ptA, leftPositions, rightPositions, halfWidth, globe);
}
// Compute side points at the end of the line.
generateParallelPoints(ptA, ptB, null, leftPositions, rightPositions, halfWidth, globe);
}
/**
* {@inheritDoc}
*
* @param positions Control points. This graphic uses only one control point, which determines the
* center of the circle.
*/
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 {
// Ensure that the iterable provides at least four positions.
Iterator<? extends Position> iterator = positions.iterator();
for (int i = 0; i < 3; i++) {
iterator.next();
}
} catch (NoSuchElementException e) {
String message = Logging.getMessage("generic.InsufficientPositions");
Logging.logger().severe(message);
throw new IllegalArgumentException(message);
}
this.positions = positions;
this.rings = null;
}
/**
* 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);
}
}
