bool Level::rotate()
{
    Piece *tmp = current;
    // Move the piece if it needs some space to rotate
    int disX = max(posX + current->getHeight() - width, 0);
    // Go to next rotation state (0-3)
    int rotation = (current->getRotation() + 1) % PieceSet::NUM_ROTATIONS;
    clear(*current);
    current = pieceSet.getPiece(current->getId(), rotation);
    // Rotate successfully
    if (place(posX - disX, posY, *current))
        return true;
    // If the piece cannot rotate due to insufficient space, undo it
    current = tmp;
    place(posX, posY, *current);
    return false;
}