public void UndoLastMove()
{
TicTacToeMove m = MoveHistory.Last() as TicTacToeMove;
SetPosition(m.Position, 0);
MoveHistory.RemoveAt(MoveHistory.Count - 1);
}
private void UndoButton_Click(object sender, RoutedEventArgs e)
{
if (MoveHistory.Count < 1)
{
return;
}
Untrack();
Move lastMove = MoveHistory.Last();
Cell target = BoardGrid.GetCellAt(lastMove.Target);
target.Filled = false;
Cell source = BoardGrid.GetCellAt(lastMove.Source);
Cell middle = BoardGrid.GetMiddleCell(source, target);
middle.Selected = false;
middle.Filled = true;
source.Selected = false;
source.Filled = true;
UndoHistory.Add(lastMove);
MoveHistory.RemoveAt(MoveHistory.Count - 1);
}
public void UndoLastMove()
{
TicTacToeMove m = MoveHistory.Last() as TicTacToeMove;
SetPosition(m.Position, 0);
Value = 0;
mWeight += mPlayer * mWeights[m.Position.Row, m.Position.Col];
mPlayer = -mPlayer;
MoveHistory.RemoveAt(MoveHistory.Count - 1);
}
/// <summary>
/// Undoes the last move, restoring the game to its state before the move was applied.
/// </summary>
public void UndoLastMove()
{
OthelloMove m = MoveHistory[MoveHistory.Count - 1] as OthelloMove;
// Note: there is a bug in this code.
if (!m.IsPass)
{
// Reset the board at the move's position.
mBoard[m.Position.Row, m.Position.Col] = 0;
Value += mCurrentPlayer;
Weight += mCurrentPlayer * mWeights[m.Position.Row, m.Position.Col];
// Iterate through the move's recorded flipsets.
foreach (var flipSet in m.FlipSets)
{
BoardPosition pos = m.Position;
// For each flipset, walk along the flipset's direction resetting pieces.
for (int i = 1; i <= flipSet.Count; i++)
{
pos = pos.Translate(flipSet.RowDelta, flipSet.ColDelta);
mBoard[pos.Row, pos.Col] = (sbyte)mCurrentPlayer;
Value += 2 * mCurrentPlayer;
Weight += 2 * mCurrentPlayer * mWeights[pos.Row, pos.Col];
}
}
// Check to see if the second-to-last move was a pass; if so, set PassCount.
if (MoveHistory.Count > 1 && (MoveHistory[MoveHistory.Count - 2] as OthelloMove).IsPass)
{
PassCount = 1;
}
}
else
{
PassCount--;
}
// Reset the remaining game state.
mCurrentPlayer = -mCurrentPlayer;
MoveHistory.RemoveAt(MoveHistory.Count - 1);
}