public static void addTile(String tileName, Point2D pos) {
		if(tiles.get(tileName) == null) {
			tiles.put(tileName, new Model2D(new String[]{tileName}));
		}
		
		if(tilePos.get(tileName) != null) {
			tilePos.get(tileName).add(pos);
		} else {
			tilePos.put(tileName, new ArrayList<Point2D>(Arrays.asList(pos)));
		}
	}