private void Traverse(Cell cell)
{
int counter =1;
do
{
counter++;
if (cell == null || (!cell.CanStep()) || cell.IsVisited)
{ }
else if (cell.IsEnd())
{
if (stack.Count + 1 == maze.MaxPathLength)
{
result.Add(1);
Console.WriteLine("{0}", counter);
Console.WriteLine("Another path found, total count is {0}.", result.Count);
}
}
else
{
cell.IsVisited = true;
stack.Push(cell);
}
cell = stack.Peek();
if (!cell.RightVisited)
{ cell = cell.TakeRight(); continue; }
if (!cell.BottomVisited)
{ cell = cell.TakeBottom(); continue; }
if (!cell.LeftVisited)
{ cell = cell.TakeLeft(); continue; }
if (!cell.TopVisited)
{ cell = cell.TakeTop(); continue; }
cell = stack.Pop();
if (cell != null) cell.ResetVisited();
if(stack.Count>0)
cell = stack.Peek();
} while (stack.Count > 0);
}
private Cell StepUp(Cell cell)
{
if (IsFirstRow(cell)) return null;
return _cells[cell.Row - 1, cell.Col];
}
private Cell StepLeft(Cell cell)
{
if (IsFirstCol(cell)) return null;
return _cells[cell.Row, cell.Col - 1];
}
private Cell StepRight(Cell cell)
{
if (IsLastCol(cell)) return null;
return _cells[cell.Row, cell.Col + 1];
}
private bool IsLastRow(Cell cell)
{
return cell.Row == _rowCnt - 1;
}
private Cell StepDown(Cell cell)
{
if (IsLastRow(cell)) return null;
return _cells[cell.Row + 1, cell.Col];
}
private bool IsLastCol(Cell cell)
{
return cell.Col == _colCnt - 1;
}
private bool IsFirstRow(Cell cell)
{
return cell.Row == 0;
}
private bool IsFirstCol(Cell cell)
{
return cell.Col == 0;
}
public bool IsBorderCell(Cell cell)
{
return cell.Row == 0 || cell.Col == 0 || cell.Row == _rowCnt - 1 || cell.Col == _colCnt - 1;
}
public Maze(int rowCount, int colCount, int[,] values)
{
_cells = new Cell[rowCount, colCount];
_rowCnt = rowCount;
_colCnt = colCount;
var pits = 0;
for (int i = 0; i < rowCount; i++)
{
for (int j = 0; j < colCount; j++)
{
var cell = _cells[i, j] = new Cell(i, j, values[i, j]);
if (cell.IsStart()) _startCell = cell;
if (cell.IsEnd()) _endCell = cell;
if (!cell.CanStep()) pits++;
}
}
for (int i = 0; i < rowCount; i++)
{
for (int j = 0; j < colCount; j++)
{
var cell = _cells[i, j];
cell.Left = StepLeft(cell);
cell.Right = StepRight(cell);
cell.Top = StepUp(cell);
cell.Bottom = StepDown(cell);
}
}
_maxPathLength = (_rowCnt * _colCnt) - pits;
}
