private void fetchAndUpdateTiles(Bbox bounds, final TileFunction<RasterTile> onUpdate) {
// fetch a bigger area to avoid server requests while panning
tileBounds = bounds.scale(3);
// Calculate tiles
// double scale = lastViewState.getScale();
// addTiles(rasterLayer.getTiles(tileBounds, scale > 1 ? scale : 1 / scale));
addTiles(rasterLayer.getTiles(tileBounds, 1 / lastViewState.getScale()));
Bbox panBounds = worldToPan(bounds);
// for each tile:
for (RasterTile tile : tiles.values()) {
if (panBounds.intersects(tile.getBounds())) {
onUpdate.execute(tile);
}
}
}
