/**
* Get the GeoPoint for x,y in screen coordinates.
*
* @param x screen coordinate
* @param y screen coordinate
* @return the corresponding GeoPoint
*/
public GeoPoint fromScreenPoint(float x, float y) {
fromScreenPoint(x, y, mMovePoint);
return new GeoPoint(
MercatorProjection.toLatitude(mMovePoint.y), MercatorProjection.toLongitude(mMovePoint.x));
}
@Override
public void query(MapTile tile, ITileDataSink sink) {
if (mTileSource.fileHeader == null) {
sink.completed(FAILED);
return;
}
if (mIntBuffer == null) mIntBuffer = new int[MAXIMUM_WAY_NODES_SEQUENCE_LENGTH * 2];
try {
mTileProjection.setTile(tile);
// mTile = tile;
/* size of tile in map coordinates; */
double size = 1.0 / (1 << tile.zoomLevel);
/* simplification tolerance */
int pixel = (tile.zoomLevel > 11) ? 1 : 2;
int simplify = Tile.SIZE / pixel;
/* translate screen pixel for tile to latitude and longitude
* tolerance for point reduction before projection. */
minDeltaLat =
(int)
(Math.abs(
MercatorProjection.toLatitude(tile.y + size)
- MercatorProjection.toLatitude(tile.y))
* 1e6)
/ simplify;
minDeltaLon =
(int)
(Math.abs(
MercatorProjection.toLongitude(tile.x + size)
- MercatorProjection.toLongitude(tile.x))
* 1e6)
/ simplify;
QueryParameters queryParameters = new QueryParameters();
queryParameters.queryZoomLevel = mTileSource.fileHeader.getQueryZoomLevel(tile.zoomLevel);
/* get and check the sub-file for the query zoom level */
SubFileParameter subFileParameter =
mTileSource.fileHeader.getSubFileParameter(queryParameters.queryZoomLevel);
if (subFileParameter == null) {
log.warn("no sub-file for zoom level: " + queryParameters.queryZoomLevel);
sink.completed(FAILED);
return;
}
QueryCalculations.calculateBaseTiles(queryParameters, tile, subFileParameter);
QueryCalculations.calculateBlocks(queryParameters, subFileParameter);
processBlocks(sink, queryParameters, subFileParameter);
} catch (IOException e) {
log.error(e.getMessage());
sink.completed(FAILED);
return;
}
sink.completed(SUCCESS);
}