/// <summary>
/// This method is used everytime a cell has received the instruction of being "erased".
/// Makes the respective action depending on the cell direction.
/// </summary>
/// <param name="cellToClear">The cell that has to be erased
private void ClearPath(Cell cellToClear)
{
while (cellStack.Count > 1 && cellToClear != cellStack.Peek())
{
_lastActivatedCell = cellStack.Peek();
cellStack.Peek().DeactivateCell();
switch (cellStack.Peek().GetDirection())
{
//In case the direction of the cell that is gonna be erased:
/*
* LEFT: Deactivate any direction of any cell.
*/
case Cell.DIRS.LEFT:
cellStack.Peek().DeactivateDirectionLine();
if (cellToClear.GetDirection() == Cell.DIRS.NONE)
{
cellToClear.DeactivateDirectionLine();
}
if (cellToClear.GetDirection() == Cell.DIRS.DOWN)
{
cellToClear.ActivateVertical();
}
if (cellToClear.GetDirection() == Cell.DIRS.UP)
{
cellToClear.DeactivateVertical();
}
break;
/*
* RIGHT: Deactivate any direction of any cell and deactive direction of itself depending of its own direction
*/
case Cell.DIRS.RIGHT:
cellStack.Peek().DeactivateDirectionLine();
if (cellToClear.GetDirection() == Cell.DIRS.DOWN)
{
cellToClear.ActivateVertical();
cellToClear.DeactivateHorizontal();
}
else
{
cellToClear.DeactivateHorizontal();
}
if (cellToClear.GetDirection() == Cell.DIRS.NONE)
{
cellToClear.DeactivateDirectionLine();
}
break;
/*
* UP: Deactivate vertical direction of itself and activate its horizontal direction depending of previous cell's direction
*/
case Cell.DIRS.UP:
cellToClear.DeactivateVertical();
if (cellToClear.GetDirection() == Cell.DIRS.LEFT)
{
cellToClear.ActivateHorizontal();
}
if (cellToClear.GetDirection() == Cell.DIRS.NONE)
{
cellToClear.DeactivateDirectionLine();
}
break;
/*
* DOWN: Deactivate any direction of any cell and activate or deactivate its own directions depending of previous cell's direction
*/
case Cell.DIRS.DOWN:
cellStack.Peek().DeactivateDirectionLine();
if (cellToClear.GetDirection() == Cell.DIRS.LEFT)
{
cellToClear.ActivateHorizontal();
cellToClear.DeactivateVertical();
}
else
{
cellToClear.DeactivateHorizontal();
cellToClear.DeactivateVertical();
}
if (cellToClear.GetDirection() == Cell.DIRS.DOWN || cellToClear.GetDirection() == Cell.DIRS.UP)
{
cellToClear.ActivateVertical();
}
if (cellToClear.GetDirection() == Cell.DIRS.NONE)
{
cellToClear.DeactivateDirectionLine();
}
break;
/*
* NONE: Deactivate everything
*/
case Cell.DIRS.NONE:
cellToClear.DeactivateDirectionLine();
break;
}
cellStack.Pop();
_cellsFilled--;
currentCellCoordinates = cellToClear.GetCoordinates();
}
}