public function shift_l_($num)
{
$bb = new BitBoard();
$bb->num1 = $this->num1;
$bb->num2 = $this->num2;
$bb->num3 = $this->num3;
$bb->num4 = $this->num4;
$bb->shift_l($num);
return $bb;
}
private function Board_AddPiece($nCol, $nRow, $pieceType)
{
// A piece gets added to the bitboard for its specific type as well as to the overall white/black bitboard.
$pos = new BitBoard('0x1');
$pos->shift_l($nCol + $nRow * 8);
switch ($pieceType) {
case PIECE_TYPE::PAWN:
$this->n64WPawns->_OR($pos);
$this->n64WAll->_OR($pos);
break;
case PIECE_TYPE::ROOK:
$this->n64WRooks->_OR($pos);
$this->n64WAll->_OR($pos);
break;
case PIECE_TYPE::KNIGHT:
$this->n64WKnights->_OR($pos);
$this->n64WAll->_OR($pos);
break;
case PIECE_TYPE::BISHOP:
$this->n64WBishops->_OR($pos);
$this->n64WAll->_OR($pos);
break;
case PIECE_TYPE::QUEEN:
$this->n64WQueens->_OR($pos);
$this->n64WAll->_OR($pos);
break;
case PIECE_TYPE::KING:
$this->n64WKing->_OR($pos);
$this->n64WAll->_OR($pos);
break;
case PIECE_TYPE::PAWN + 6:
$this->n64BPawns->_OR($pos);
$this->n64BAll->_OR($pos);
break;
case PIECE_TYPE::ROOK + 6:
$this->n64BRooks->_OR($pos);
$this->n64BAll->_OR($pos);
break;
case PIECE_TYPE::KNIGHT + 6:
$this->n64BKnights->_OR($pos);
$this->n64BAll->_OR($pos);
break;
case PIECE_TYPE::BISHOP + 6:
$this->n64BBishops->_OR($pos);
$this->n64BAll->_OR($pos);
break;
case PIECE_TYPE::QUEEN + 6:
$this->n64BQueens->_OR($pos);
$this->n64BAll->_OR($pos);
break;
case PIECE_TYPE::KING + 6:
$this->n64BKing->_OR($pos);
$this->n64BAll->_OR($pos);
break;
}
$this->n64All = BitBoard::_OR_($this->n64BAll, $this->n64WAll);
}