CellsAutomate.Tools.DirectionEx.DirectionByPointsWithNumber C# (CSharp) Method

        public static int DirectionByPointsWithNumber(Point start, Point finish)
        {
            var xOffset = finish.X - start.X;
            var yOffset = finish.Y - start.Y;

            if (xOffset == 0 && yOffset == -1) return 0;
            if (xOffset == 1 && yOffset == 0) return 1;
            if (xOffset == 0 && yOffset == 1) return 2;
            if (xOffset == -1 && yOffset == 0) return 3;

            throw new ArgumentException();
        }