public void dump() {
		Log.println("Map width = " + getWidth());
		Log.println("Map height = " + getHeight());
		for (int y=0; y<getHeight(); y++) {
			for (int x=0; x<getWidth(); x++) {
				int mapValue = getMapValue(x, y);
				Log.print(mapValue==0 ? " " : mapValue >= 255 ? "o" : ".");				
			}
			Log.println();
		}
	}