public void goTo(Position lookAtPos, double distance) {
Globe globe = this.getView().getGlobe();
BasicFlyView view = (BasicFlyView) this.getView();
Position lookFromPos =
new Position(
lookAtPos,
globe.getElevation(lookAtPos.getLatitude(), lookAtPos.getLongitude()) + distance);
// TODO: scale on mid-altitude?
final long MIN_LENGTH_MILLIS = 4000;
final long MAX_LENGTH_MILLIS = 16000;
long timeToMove =
AnimationSupport.getScaledTimeMillisecs(
view.getEyePosition(), lookFromPos, MIN_LENGTH_MILLIS, MAX_LENGTH_MILLIS);
FlyToFlyViewAnimator panAnimator =
FlyToFlyViewAnimator.createFlyToFlyViewAnimator(
view,
view.getEyePosition(),
lookFromPos,
view.getHeading(),
Angle.ZERO,
view.getPitch(),
Angle.ZERO,
view.getEyePosition().getElevation(),
lookFromPos.getElevation(),
timeToMove,
WorldWind.ABSOLUTE);
this.gotoAnimControl.put(VIEW_ANIM_PAN, panAnimator);
this.getView().firePropertyChange(AVKey.VIEW, null, this.getView());
}
public void lookAt(Position lookAtPos, long timeToMove) {
BasicFlyView view = (BasicFlyView) this.getView();
Vec4 lookDirection;
double distanceToSurface;
Vec4 currentLookAtPt = view.getCenterPoint();
Position newPosition;
if (currentLookAtPt == null) {
view.getGlobe().computePointFromPosition(lookAtPos);
double elevAtLookAtPos =
view.getGlobe().getElevation(lookAtPos.getLatitude(), lookAtPos.getLongitude());
newPosition = new Position(lookAtPos, elevAtLookAtPos + 10000);
} else {
Vec4 currentEyePt = view.getEyePoint();
distanceToSurface = currentEyePt.distanceTo3(currentLookAtPt);
lookDirection = currentLookAtPt.subtract3(currentEyePt).normalize3();
Vec4 newLookAtPt = view.getGlobe().computePointFromPosition(lookAtPos);
Vec4 flyToPoint = newLookAtPt.add3(lookDirection.multiply3(-distanceToSurface));
newPosition = view.getGlobe().computePositionFromPoint(flyToPoint);
}
ViewUtil.ViewState viewCoords = view.getViewState(newPosition, lookAtPos);
FlyToFlyViewAnimator panAnimator =
FlyToFlyViewAnimator.createFlyToFlyViewAnimator(
view,
view.getEyePosition(),
newPosition,
view.getHeading(),
viewCoords.getHeading(),
view.getPitch(),
viewCoords.getPitch(),
view.getEyePosition().getElevation(),
viewCoords.getPosition().getElevation(),
timeToMove,
WorldWind.ABSOLUTE);
this.gotoAnimControl.put(VIEW_ANIM_PAN, panAnimator);
this.getView().firePropertyChange(AVKey.VIEW, null, this.getView());
view.firePropertyChange(AVKey.VIEW, null, view);
}