public static Sweeper createSweeper(int aSweeperId, Viewer aViewer)
	{
		switch (aSweeperId)
		{
			case 0 :
				return new HexSweeper(aViewer);
			case 1 :
				return new OctSweeper(aViewer);
			case 2 :
				return new DodecaSweeper(aViewer);
			case 3 :
				return new TriSweeper(aViewer);
			case 4 :
				return new NovemSweeper(aViewer);
			case 5 :
				return new RandomSweeper(aViewer);
			default :
				return null;
		}
	}