Java源码示例：gov.nasa.worldwind.View
示例1
/**
* Get the lat/long world geometry from two screen corner coordinates.
*
* @param wwd
* the {@link WorldWindow} instance.
* @param x1
* the first point screen x.
* @param y1
* the first point screen y.
* @param x2
* the second point screen x.
* @param y2
* the second point screen y.
* @return the world geomnetry.
*/
public static Geometry getScreenPointsPolygon( WorldWindow wwd, int x1, int y1, int x2, int y2 ) {
View view = wwd.getView();
Position p1 = view.computePositionFromScreenPoint(x1, y1);
Position p2 = view.computePositionFromScreenPoint(x1, y2);
Position p3 = view.computePositionFromScreenPoint(x2, y2);
Position p4 = view.computePositionFromScreenPoint(x2, y1);
Coordinate[] coords = { //
new Coordinate(p1.longitude.degrees, p1.latitude.degrees), //
new Coordinate(p2.longitude.degrees, p2.latitude.degrees), //
new Coordinate(p3.longitude.degrees, p3.latitude.degrees), //
new Coordinate(p4.longitude.degrees, p4.latitude.degrees)//
};
Geometry convexHull = GeometryUtilities.gf().createMultiPoint(coords).convexHull();
return convexHull;
}
示例2
public ReferencedEnvelope getViewportBounds() {
View view = wwd.getView();
Position posUL = view.computePositionFromScreenPoint(0, 0);
Position posLR = view.computePositionFromScreenPoint(getWidth(), getHeight());
if (posLR != null && posUL != null) {
double west = posUL.longitude.degrees;
double north = posUL.latitude.degrees;
double east = posLR.longitude.degrees;
double south = posLR.latitude.degrees;
ReferencedEnvelope env = new ReferencedEnvelope(west, east, south, north, DefaultGeographicCRS.WGS84);
return env;
} else {
return null;// new ReferencedEnvelope(-180, 180, -90, 90,
// DefaultGeographicCRS.WGS84);
}
}
示例3
@Override
protected void focusPoint(final GeoPoint point, final boolean isRunning, final boolean animation) {
final long elevation = 5000 * 1000;
if (_controller == null || _controller.getWWd() == null) {
return;
}
// center the map on the given point
final LabeledPath label = point == null ? null : _pointToLabel.get(point);
if (label != null) {
highlightAnnotation(label, point);
final View view = _controller.getWWd().getView();
final OrbitViewInputHandler ovih = (OrbitViewInputHandler) view.getViewInputHandler();
if (animation && Env.INSTANCE.getAnimationSpeed() > 0) {
final Position pos = new Position(label.getLocations().iterator().next(), 10);
ovih.addPanToAnimator(pos, view.getHeading(), view.getPitch(), elevation, Env.INSTANCE.getAnimationSpeed(), true);
// if (_mode == Mode.TRACE_ROUTE && isRunning) {
// // if tracing, move at the speed of the timeout
// final Position pos = new Position(label.getLocations().iterator().next(), 10);
// ovih.addPanToAnimator(pos, view.getHeading(), view.getPitch(), elevation,
// Env.INSTANCE.getAnimationSpeed(), true);
// } else if (_mode == Mode.TRACE_ROUTE || !isRunning) {
// _controller.getWWd().getView()
// .goTo(new Position(label.getLocations().iterator().next(), 10), elevation);
// }
} else {
final Position p = new Position(Angle.fromDegrees(point.getLat()), Angle.fromDegrees(point.getLon()), 2000);
((OrbitView) view).setCenterPosition(p);
}
}
}
示例4
public void setZoomLimits( double minZoom, double maxZoom ) {
View view = getWwd().getView();
if (view != null && view instanceof OrbitView) {
OrbitView oView = (OrbitView) view;
OrbitViewLimits orbitViewLimits = oView.getOrbitViewLimits();
orbitViewLimits.setZoomLimits(minZoom, maxZoom);
}
}
示例5
public void setPitchLimits( Angle minAngle, Angle maxangle ) {
View view = getWwd().getView();
if (view != null && view instanceof OrbitView) {
OrbitView oView = (OrbitView) view;
OrbitViewLimits orbitViewLimits = oView.getOrbitViewLimits();
orbitViewLimits.setPitchLimits(minAngle, maxangle);
}
}
示例6
/**
* Move to see a given sector.
*
* @param sector
* the sector to go to.
* @param animate
* if <code>true</code>, it animates to the position.
*/
public void goTo( Sector sector, boolean animate ) {
View view = getWwd().getView();
view.stopAnimations();
view.stopMovement();
if (sector == null) {
return;
}
// Create a bounding box for the specified sector in order to estimate
// its size in model coordinates.
Box extent = Sector.computeBoundingBox(getWwd().getModel().getGlobe(),
getWwd().getSceneController().getVerticalExaggeration(), sector);
// Estimate the distance between the center position and the eye
// position that is necessary to cause the sector to
// fill a viewport with the specified field of view. Note that we change
// the distance between the center and eye
// position here, and leave the field of view constant.
Angle fov = view.getFieldOfView();
double zoom = extent.getRadius() / fov.cosHalfAngle() / fov.tanHalfAngle();
// Configure OrbitView to look at the center of the sector from our
// estimated distance. This causes OrbitView to
// animate to the specified position over several seconds. To affect
// this change immediately use the following:
if (animate) {
view.goTo(new Position(sector.getCentroid(), 0d), zoom);
} else {
((OrbitView) wwd.getView()).setCenterPosition(new Position(sector.getCentroid(), 0d));
((OrbitView) wwd.getView()).setZoom(zoom);
}
}
示例7
private void gotoProduct(final Product product) {
if (product == null) return;
final View theView = getWwd().getView();
final Position origPos = theView.getEyePosition();
final GeoCoding geoCoding = product.getSceneGeoCoding();
if (geoCoding != null && origPos != null) {
final GeoPos centre = product.getSceneGeoCoding().getGeoPos(new PixelPos(product.getSceneRasterWidth() / 2,
product.getSceneRasterHeight() / 2), null);
centre.normalize();
theView.setEyePosition(Position.fromDegrees(centre.getLat(), centre.getLon(), origPos.getElevation()));
}
}
示例8
public static Point getScreenPoint( WorldWindow wwd, int x1, int y1 ) {
View view = wwd.getView();
Position p = view.computePositionFromScreenPoint(x1, y1);
Coordinate c = new Coordinate(p.longitude.degrees, p.latitude.degrees);
return GeometryUtilities.gf().createPoint(c);
}
示例9
/**
* Move to a given location.
*
* @param lon
* the longitude.
* @param lat
* the latitude.
* @param elev
* the eye elevation.
* @param azimuth
* if supplied, the map is rotated to follow that angle.
* @param animate
* if <code>true</code>, it animates to the position.
*/
public synchronized Position goTo( Double lon, Double lat, Double elev, Double azimuth, boolean animate ) {
View view = getWwd().getView();
view.stopAnimations();
view.stopMovement();
Position eyePosition;
if (lon == null || lat == null) {
Position currentEyePosition = wwd.getView().getCurrentEyePosition();
if (currentEyePosition != null) {
lat = currentEyePosition.latitude.degrees;
lon = currentEyePosition.longitude.degrees;
} else {
return null;
}
}
if (elev == null) {
// use the current
elev = wwd.getView().getCurrentEyePosition().getAltitude();
}
if (Double.isNaN(elev)) {
if (!Double.isNaN(lastElevation)) {
elev = lastElevation;
} else {
elev = NwwUtilities.DEFAULT_ELEV;
}
}
eyePosition = NwwUtilities.toPosition(lat, lon, elev);
if (animate) {
view.goTo(eyePosition, elev);
} else {
view.setEyePosition(eyePosition);
}
if (azimuth != null) {
Angle heading = Angle.fromDegrees(azimuth);
view.setHeading(heading);
}
lastElevation = elev;
return eyePosition;
}
