@Override
public Point toPoint(GeoPoint in, Point out, byte zoom) {
if (out == null) {
// create a new point and return it
return new Point(
(int) MercatorProjection.longitudeToPixelX(in.getLongitude(), zoom),
(int) MercatorProjection.latitudeToPixelY(in.getLatitude(), zoom));
}
// reuse the existing point
out.x = (int) MercatorProjection.longitudeToPixelX(in.getLongitude(), zoom);
out.y = (int) MercatorProjection.latitudeToPixelY(in.getLatitude(), zoom);
return out;
}
@Override
public Point toPixels(GeoPoint in, Point out) {
if (this.mapView.getWidth() <= 0 || this.mapView.getHeight() <= 0) {
return null;
}
MapPosition mapPosition = this.mapView.getMapPosition().getMapPosition();
// calculate the pixel coordinates of the top left corner
GeoPoint geoPoint = mapPosition.geoPoint;
double pixelX =
MercatorProjection.longitudeToPixelX(geoPoint.getLongitude(), mapPosition.zoomLevel);
double pixelY =
MercatorProjection.latitudeToPixelY(geoPoint.getLatitude(), mapPosition.zoomLevel);
pixelX -= this.mapView.getWidth() >> 1;
pixelY -= this.mapView.getHeight() >> 1;
if (out == null) {
// create a new point and return it
return new Point(
(int)
(MercatorProjection.longitudeToPixelX(in.getLongitude(), mapPosition.zoomLevel)
- pixelX),
(int)
(MercatorProjection.latitudeToPixelY(in.getLatitude(), mapPosition.zoomLevel)
- pixelY));
}
// reuse the existing point
out.x =
(int)
(MercatorProjection.longitudeToPixelX(in.getLongitude(), mapPosition.zoomLevel)
- pixelX);
out.y =
(int)
(MercatorProjection.latitudeToPixelY(in.getLatitude(), mapPosition.zoomLevel) - pixelY);
return out;
}
@Override
public GeoPoint fromPixels(int x, int y) {
if (this.mapView.getWidth() <= 0 || this.mapView.getHeight() <= 0) {
return null;
}
MapPosition mapPosition = this.mapView.getMapPosition().getMapPosition();
// calculate the pixel coordinates of the top left corner
GeoPoint geoPoint = mapPosition.geoPoint;
double pixelX =
MercatorProjection.longitudeToPixelX(geoPoint.getLongitude(), mapPosition.zoomLevel);
double pixelY =
MercatorProjection.latitudeToPixelY(geoPoint.getLatitude(), mapPosition.zoomLevel);
pixelX -= this.mapView.getWidth() >> 1;
pixelY -= this.mapView.getHeight() >> 1;
// convert the pixel coordinates to a GeoPoint and return it
return new GeoPoint(
MercatorProjection.pixelYToLatitude(pixelY + y, mapPosition.zoomLevel),
MercatorProjection.pixelXToLongitude(pixelX + x, mapPosition.zoomLevel));
}
