public void SolveMazeMultipleExits(MazeCell[,] mazeArray)
{
InitializeMaze(mazeArray);
var storedMazeArray = new MazeCell[mazeArray.GetLength(0), mazeArray.GetLength(1)];
CopyMaze(storedMazeArray, mazeArray);
while (ExitCells.Count > 0)
{
ExitCell = ExitCells.Dequeue();
mazeArray[ExitCell.Y, ExitCell.X].IsVisited = false;
CurrentCell = EntryCell;
var mazePath = FindLongestPath(mazeArray);
if (mazePath == null)
{
Console.WriteLine($"Could not find path to {ExitCell}.");
Console.WriteLine();
mazeArray[ExitCell.Y, ExitCell.X].Character = 'x';
mazeArray[ExitCell.Y, ExitCell.X].IsVisited = true;
DisplayMaze(mazeArray);
MazeStack.Clear();
}
else
{
mazePath[0].IsVisited = true;
mazePath.Reverse();
mazePath.RemoveAt(0);
foreach (var mazeCell in mazePath)
{
if (mazeCell.Character != ExitCell.Character)
{
mazeArray[mazeCell.Y, mazeCell.X].Character = '.';
}
else
{
mazeArray[mazeCell.Y, mazeCell.X].Character = '@';
ExitCell.Character = mazeArray[mazeCell.Y, mazeCell.X].Character;
}
DisplayMaze(mazeArray);
}
Console.WriteLine($"Longest path from {EntryCell} to {ExitCell} found.");
Console.WriteLine();
MazeStack.Clear();
storedMazeArray[ExitCell.Y, ExitCell.X] = ExitCell;
CopyMaze(mazeArray, storedMazeArray);
}
}
}
private void InitializeMaze(MazeCell[,] mazeArray)
{
foreach (var mazeCell in mazeArray)
{
if (mazeCell.Character == 'm')
{
EntryCell = mazeCell;
CurrentCell = EntryCell;
}
if (mazeCell.Character == 'e')
{
ExitCells.Enqueue(mazeCell);
}
if (mazeCell.Character == '0' || mazeCell.Character == 'm')
{
mazeCell.IsVisited = false;
}
else
{
mazeCell.IsVisited = true;
}
MazeStack.Clear();
}
}
public void SolveMazeOneExitOld(MazeCell[,] mazeArray)
{
for (int y = 0; y < mazeArray.GetLength(0); y++)
{
for (int x = 0; x < mazeArray.GetLength(1); x++)
{
if (mazeArray[y, x].Character == 'm')
{
EntryCell = mazeArray[y, x];
}
if (mazeArray[y, x].Character == 'e')
{
ExitCell = mazeArray[y, x];
}
}
}
CurrentCell = EntryCell;
while (CurrentCell != ExitCell)
{
if (CurrentCell.Character == 'e')
{
CurrentCell = ExitCell;
}
else
{
CurrentCell.Character = '.';
}
if (mazeArray[CurrentCell.Y + 1, CurrentCell.X].Character == '0' || mazeArray[CurrentCell.Y + 1, CurrentCell.X].Character == 'e')
{
MazeStack.Push(mazeArray[CurrentCell.Y + 1, CurrentCell.X]);
}
if (mazeArray[CurrentCell.Y - 1, CurrentCell.X].Character == '0' || mazeArray[CurrentCell.Y - 1, CurrentCell.X].Character == 'e')
{
MazeStack.Push(mazeArray[CurrentCell.Y - 1, CurrentCell.X]);
}
if (mazeArray[CurrentCell.Y, CurrentCell.X - 1].Character == '0' || mazeArray[CurrentCell.Y, CurrentCell.X - 1].Character == 'e')
{
MazeStack.Push(mazeArray[CurrentCell.Y, CurrentCell.X - 1]);
}
if (mazeArray[CurrentCell.Y, CurrentCell.X + 1].Character == '0' || mazeArray[CurrentCell.Y, CurrentCell.X + 1].Character == 'e')
{
MazeStack.Push(mazeArray[CurrentCell.Y, CurrentCell.X + 1]);
}
DisplayMaze(mazeArray);
if (MazeStack.Count <= 0)
{
Console.WriteLine("Unsolvable maze.");
return;
}
else
{
CurrentCell = MazeStack.Pop();
}
}
Console.WriteLine("Exit reached.");
}
public void SolveMazeMultipleExitsOld(MazeCell[,] mazeArray)
{
bool NotEntryCell = false;
//ExitCellCount = 0;
var foundExitCells = 0;
InitializeMaze(mazeArray);
bool ExitMethodFlag = false;
if (ExitCells.Count > 1)
{
Console.WriteLine("Would you like to continue search from last exit found(1), or start from entrance(2)?");
var answer = Console.ReadLine();
if (answer == "1")
{
ExitMethodFlag = true;
}
}
CurrentCell = EntryCell;
var storedMazeArray = new MazeCell[mazeArray.GetLength(0), mazeArray.GetLength(1)];
for (int y = 0; y < mazeArray.GetLength(0); y++)
{
for (int x = 0; x < mazeArray.GetLength(1); x++)
{
storedMazeArray[y, x] = new MazeCell(mazeArray[y, x].X, mazeArray[y, x].Y, mazeArray[y, x].Character);
}
}
while (foundExitCells != ExitCells.Count)
{
if (NotEntryCell == false)
{
NotEntryCell = true;
}
else
{
if (CurrentCell.Character == 'e')
{
foundExitCells++;
storedMazeArray[CurrentCell.Y, CurrentCell.X].Character = '@';
mazeArray = new MazeCell[mazeArray.GetLength(0), mazeArray.GetLength(1)];
for (int y = 0; y < mazeArray.GetLength(0); y++)
{
for (int x = 0; x < mazeArray.GetLength(1); x++)
{
mazeArray[y, x] = new MazeCell(storedMazeArray[y, x].X, storedMazeArray[y, x].Y, storedMazeArray[y, x].Character);
}
}
Console.WriteLine("Refreshed array");
if (ExitMethodFlag == true)
{
CurrentCell = mazeArray[CurrentCell.Y, CurrentCell.X];
MazeStack = new Stack <MazeCell>();
}
else
{
CurrentCell = mazeArray[EntryCell.Y, EntryCell.X];
MazeStack = new Stack <MazeCell>();
}
}
else
{
CurrentCell.Character = '.';
}
}
if (mazeArray[CurrentCell.Y + 1, CurrentCell.X].Character == '0' || mazeArray[CurrentCell.Y + 1, CurrentCell.X].Character == 'e')
{
MazeStack.Push(mazeArray[CurrentCell.Y + 1, CurrentCell.X]);
}
if (mazeArray[CurrentCell.Y - 1, CurrentCell.X].Character == '0' || mazeArray[CurrentCell.Y - 1, CurrentCell.X].Character == 'e')
{
MazeStack.Push(mazeArray[CurrentCell.Y - 1, CurrentCell.X]);
}
if (mazeArray[CurrentCell.Y, CurrentCell.X - 1].Character == '0' || mazeArray[CurrentCell.Y, CurrentCell.X - 1].Character == 'e')
{
MazeStack.Push(mazeArray[CurrentCell.Y, CurrentCell.X - 1]);
}
if (mazeArray[CurrentCell.Y, CurrentCell.X + 1].Character == '0' || mazeArray[CurrentCell.Y, CurrentCell.X + 1].Character == 'e')
{
MazeStack.Push(mazeArray[CurrentCell.Y, CurrentCell.X + 1]);
}
DisplayMaze(mazeArray);
if (MazeStack.Count <= 0)
{
if (foundExitCells > 0)
{
Console.WriteLine("Only " + foundExitCells +
" were/was found. Other exits are unreachable.");
}
else
{
Console.WriteLine("Unsolvable maze.");
}
break;
}
else
{
CurrentCell = MazeStack.Pop();
}
}
}