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var x = new Point(3, 3);
			var y = new Point(1, 2);

			var x1 = y.X - x.X;
			var y1 = y.Y - x.Y;

			var scale = Math.Max(Math.Abs(x1), Math.Abs(y1));

			var direction = new Point(x1 / scale, y1 / scale);