public IEnumerable<Location> GetRoute(Location source, Location destination, MazeObject[,] maze)
{
int rows = maze.GetLength(0);
int cols = maze.GetLength(1);
bool[,] visited = new bool[rows, cols];
Queue<SimpleTreeNode<Location>> treeNodesQueue = new Queue<SimpleTreeNode<Location>>();
SimpleTreeNode<Location> root = new SimpleTreeNode<Location>(source);
treeNodesQueue.Enqueue(root);
visited[source.Row, source.Col] = true;
while (treeNodesQueue.Count > 0)
{
SimpleTreeNode<Location> node = treeNodesQueue.Dequeue();
if (node.Value == destination)
{
// traverse the tree bottom-up to get the shortest path
IEnumerable<Location> route = GetAllPredecessors(node);
return route;
}
SimpleTreeNode<Location>[] childNodes = new SimpleTreeNode<Location>[]
{
new SimpleTreeNode<Location>(new Location(node.Value.Row, node.Value.Col - 1)), // left
new SimpleTreeNode<Location>(new Location(node.Value.Row, node.Value.Col + 1)), // right
new SimpleTreeNode<Location>(new Location(node.Value.Row - 1, node.Value.Col)), // up
new SimpleTreeNode<Location>(new Location(node.Value.Row + 1, node.Value.Col)) // down
};
node.Children.AddRange(childNodes);
foreach (SimpleTreeNode<Location> child in childNodes)
{
if (child.Value.Row >= 0 && child.Value.Row < rows
&& child.Value.Col >= 0 && child.Value.Col < cols
&& !(maze[child.Value.Row, child.Value.Col].Type == MazeObjectType.Brick)
&& !visited[child.Value.Row, child.Value.Col])
{
node.Children.Add(child);
treeNodesQueue.Enqueue(child);
visited[child.Value.Row, child.Value.Col] = true;
}
}
}
return new List<Location>();
}
private void InitMaze()
{
ulong[] rows = new ulong[]{
1099511627775, // row 1
549755813889, // row 2
755578613749, // row 3
722259322901, // row 4
737307960261, // row 5
599861673969, // row 6
962209021959, // row 7
206154235892, // row 8
137573203972, // row 9
1013276651479, // row 10
34527683408, // row 11
1076594124895, // row 12
45801975632, // row 13
1007874646359, // row 14
146767002692, // row 15
173946175764, // row 16
1025418198391, // row 17
551905394945, // row 18
803158884189, // row 19
695784702021, // row 20
754835258869, // row 21
549757911041, // row 22
1099511627775 // row 23
};
for (int rowIndex = 0; rowIndex < MAZE_ROWS; rowIndex++)
{
for (int colIndex = 0; colIndex < MAZE_COLS; colIndex++)
{
maze[rowIndex, MAZE_COLS - 1 - colIndex] = new MazeObject(MazeObjectType.EmptyCell);
ulong mask = (ulong)1 << colIndex;
if ((rows[rowIndex] & mask) != (ulong)0)
{
// the bricks
maze[rowIndex, MAZE_COLS - 1 - colIndex] = new MazeObject(MazeObjectType.Brick);
Draw(rowIndex, MAZE_COLS - 1 - colIndex, '#', ConsoleColor.Blue);
if (rowIndex == 9 && colIndex == 22)
{
// the monster pen door
maze[rowIndex, MAZE_COLS - 1 - colIndex] = new MazeObject(MazeObjectType.PenDoor);
Draw(rowIndex, MAZE_COLS - 1 - colIndex, '=', ConsoleColor.Magenta);
}
}
else if (rowIndex >= 8 && rowIndex <= 15 && colIndex <= 26 && colIndex >= 16
|| (rowIndex == 7 || rowIndex == 8 || rowIndex == 14 || rowIndex == 15)
&& (colIndex >= MAZE_COLS - 2 || colIndex <= 1)
|| (rowIndex == 10 || rowIndex == 12) && (colIndex >= MAZE_COLS - 4 || colIndex <= 3))
{
// these will remain empty cells
continue;
}
else if ((rowIndex == 2 || rowIndex == 20) && (colIndex == 1 || colIndex == 38))
{
// the power pellets (energizers)
maze[rowIndex, MAZE_COLS - 1 - colIndex] = new MazeObject(MazeObjectType.PowerPellet, 50);
Draw(rowIndex, MAZE_COLS - 1 - colIndex, '$', ConsoleColor.White);
}
else
{
// the pellets
maze[rowIndex, MAZE_COLS - 1 - colIndex] = new MazeObject(MazeObjectType.Pellet, 10);
Draw(rowIndex, MAZE_COLS - 1 - colIndex, '.', ConsoleColor.Yellow);
}
}
}
Console.CursorVisible = false;
}
private void MakeCellEmpty(int row, int col)
{
maze[row, col] = new MazeObject(MazeObjectType.EmptyCell);
Draw(row, col, (char)32, ConsoleColor.Black);
}
public void CalcRoute(Location destination, MazeObject[,] maze)
{
this.route = this.strategy.GetRoute(this.Location, destination, maze);
this.enumerator = this.route.GetEnumerator();
}