+ /// <summary>\r
+ /// Helper method to get a neighbor cell from a point and a direction.\r
+ /// </summary>\r
+ /// <param name="point">The point.</param>\r
+ /// <param name="direction">The direction.</param>\r
+ /// <returns>The neighbor cell coordinates.</returns>\r
+ public static Point GetNeighbor(Point point, Direction direction)\r
+ {\r
+ switch (direction)\r
+ {\r
+ case Direction.Left: return new Point(point.X - 1, point.Y);\r
+ case Direction.UpperLeft: return new Point(point.X - 1, point.Y - 1);\r
+ case Direction.Up: return new Point(point.X, point.Y - 1);\r
+ case Direction.UpperRight: return new Point(point.X + 1, point.Y - 1);\r
+ case Direction.Right: return new Point(point.X + 1, point.Y);\r
+ case Direction.LowerRight: return new Point(point.X + 1, point.Y + 1);\r
+ case Direction.Down: return new Point(point.X, point.Y + 1);\r
+ case Direction.LowerLeft: return new Point(point.X - 1, point.Y + 1);\r
+ }\r
+ return point;\r
+ }\r
+\r
+ /// <summary>\r
+ /// Helper method to get the two neighbor cells of two nearby cells.\r
+ /// </summary>\r
+ /// <param name="a">A point.</param>\r
+ /// <param name="b">Another point.</param>\r
+ /// <returns>An array of two points representing the neighbor cells.</returns>\r
+ public static Point[] GetNeighbors(Point a, Point b)\r
+ {\r
+ Point[] neighbors = new Point[2];\r
+ neighbors[0] = new Point(a.X, b.Y);\r
+ neighbors[1] = new Point(b.X, a.Y);\r
+ return neighbors;\r
+ }\r
+\r
+\r
+ /// <summary>\r
+ /// Helper method to get a Direction type from directions.\r
+ /// </summary>\r
+ /// <param name="left">Left.</param>\r
+ /// <param name="right">Right.</param>\r
+ /// <param name="up">Up.</param>\r
+ /// <param name="down">Down.</param>\r
+ /// <returns>The direction.</returns>\r
+ public static Direction GetDirection(bool left, bool right, bool up, bool down)\r
+ {\r
+ if (left && !right)\r
+ {\r
+ if (up) return Direction.UpperLeft;\r
+ else if (down) return Direction.LowerLeft;\r
+ else return Direction.Left;\r
+ }\r
+ else if (right && !left)\r
+ {\r
+ if (up) return Direction.UpperRight;\r
+ else if (down) return Direction.LowerRight;\r
+ else return Direction.Right;\r
+ }\r
+ else if (up) return Direction.Up;\r
+ else if (down) return Direction.Down;\r
+ else return Direction.None;\r
+ }\r
+\r
+ /// <summary>\r
+ /// Helper method to get the general Direction type if you want to move\r
+ /// from one cell to another.\r
+ /// <param name="a">Starting point.</param>\r
+ /// <param name="b">Destination point.</param>\r
+ /// <returns>The direction toward the cell.</returns>\r
+ public static Direction GetDirection(Point a, Point b)\r
+ {\r
+ int dx = b.X - a.X;\r
+ int dy = b.Y - a.Y;\r
+\r
+ if (dx < 0)\r
+ {\r
+ if (dy < 0) return Direction.UpperLeft;\r
+ else if (dy > 0) return Direction.LowerLeft;\r
+ else return Direction.Left;\r
+ }\r
+ else if (dx > 0)\r
+ {\r
+ if (dy < 0) return Direction.UpperRight;\r
+ else if (dy > 0) return Direction.LowerRight;\r
+ else return Direction.Right;\r
+ }\r
+ else if (dy < 0) return Direction.Up;\r
+ else if (dy > 0) return Direction.Down;\r
+ else return Direction.None;\r
+ }\r
+\r