/// <summary>
/// Check if there are lines to be cleared on the board.
/// Return the number of lines cleared.
/// </summary>
private int CheckLineClears(IEnumerable <int> rows)
{
// Sort the rows so things don't get messed up when we start clearing them.
SortedSet <int> fullRows = new SortedSet <int>(Comparer <int> .Create(
(i1, i2) => i2.CompareTo(i1)
));
int clearCount = 0;
foreach (int row in rows)
{
if (Board.LineIsFull(row))
{
if (Board.FrozenTetromino != null)
{
foreach (Vector2Int relativeMino in Board.FrozenTetromino.MinoTiles)
{
Vector2Int absMino = Board.FrozenTetromino.Position + relativeMino;
if (absMino.y == row)
{
Tetromino oldFrozen = Board.FrozenTetromino;
Board.FrozenTetromino = null;
Board.AddTetromino(oldFrozen);
break;
}
}
}
fullRows.Add(row);
}
}
foreach (int row in fullRows)
{
clearCount++;
Board.ClearRow(row);
}
return(clearCount);
}