public override int GetHashCode()
{
return(board?.GetHashCode() ?? 0);
}
/// <summary>
/// 执行移动指令
/// </summary>
/// <param name="direction">需要移动的方向</param>
/// <returns>本次移动的得分，-1表示无法移动</returns>
public int Move(Direction direction)
{
isMoving = true;
Hashtable actions = new Hashtable();
int totalScore = 0;
bool isMoved = false;
int[,] oldValue = BoardValue();
int boardBackup = board.GetHashCode();
for (int i = 0; i < SIZE; i++)
{
int[] row = new int[SIZE];
for (int j = 0; j < SIZE; j++)
{
Tile tmpTile;
if (direction == Direction.Up)
{
tmpTile = board[j, i];
}
else if (direction == Direction.Down)
{
tmpTile = board[SIZE - j - 1, i];
}
else if (direction == Direction.Left)
{
tmpTile = board[i, j];
}
else if (direction == Direction.Right)
{
tmpTile = board[i, SIZE - j - 1];
}
else
{
throw new ArgumentException();
}
row[j] = tmpTile == null ? 0 : tmpTile.index;
}
// 设置每条直线的起点和终点
int begin, end;
if (direction == Direction.Up)
{
begin = i;
end = i + SIZE * SIZE;
}
else if (direction == Direction.Down)
{
begin = i + (SIZE - 1) * SIZE;
end = i - SIZE;
}
else if (direction == Direction.Left)
{
begin = i * SIZE;
end = i * SIZE + SIZE;
}
else if (direction == Direction.Right)
{
begin = (i + 1) * SIZE - 1;
end = i * SIZE - 1;
}
else
{
throw new ArgumentException();
}
int rowScore;
actions = MergeActionsTable(CombineLine(begin, end, row, out rowScore), actions);
totalScore += rowScore;
}
PlayActions(actions);
int[,] newValue = BoardValue();
for (int i = 0; i < SIZE; i++)
{
for (int j = 0; j < SIZE; j++)
{
if (oldValue[i, j] != newValue[i, j])
{
isMoved = true;
}
}
}
return(isMoved ? totalScore : -1);
}
