PHP Board::vert_distance方法代码示例

 function reachable_squares()
 {
     #Array of square where the piece can move to
     $squares = array();
     $csq = $this->get_current_square();
     $hdist = abs(Board::horz_distance("a1", $csq));
     $vdist = abs(Board::vert_distance("a1", $csq));
     $dist = $hdist > $vdist ? $vdist : $hdist;
     $sq = Board::add_horz_distance($csq, -$dist);
     $sq = Board::add_vert_distance($sq, -$dist);
     $squares = array_merge($squares, Board::squares_in_line($csq, $sq));
     $hdist = abs(Board::horz_distance("h1", $csq));
     $vdist = abs(Board::vert_distance("h1", $csq));
     $dist = $hdist > $vdist ? $vdist : $hdist;
     $sq = Board::add_horz_distance($csq, $dist);
     $sq = Board::add_vert_distance($sq, -$dist);
     $squares = array_merge($squares, Board::squares_in_line($csq, $sq));
     $hdist = abs(Board::horz_distance("a8", $csq));
     $vdist = abs(Board::vert_distance("a8", $csq));
     $dist = $hdist > $vdist ? $vdist : $hdist;
     $sq = Board::add_horz_distance($csq, -$dist);
     $sq = Board::add_vert_distance($sq, $dist);
     $squares = array_merge($squares, Board::squares_in_line($csq, $sq));
     $hdist = abs(Board::horz_distance("h8", $csq));
     $vdist = abs(Board::vert_distance("h8", $csq));
     $dist = $hdist > $vdist ? $vdist : $hdist;
     $sq = Board::add_horz_distance($csq, $dist);
     $sq = Board::add_vert_distance($sq, $dist);
     $squares = array_merge($squares, Board::squares_in_line($csq, $sq));
     #Removes current position square
     $squares = preg_grep("/^{$csq}\$/", $squares, PREG_GREP_INVERT);
     return $squares;
 }

 function reachable_squares()
 {
     #Array of square where the piece can move to
     $squares = array();
     $csq = $this->get_current_square();
     $x = Board::horz_distance("a4", $csq);
     $y = Board::vert_distance("d1", $csq);
     $row_start = 'a' . ($y + 1);
     $row_end = 'h' . ($y + 1);
     $col_start = chr(ord('a') + $x) . '1';
     $col_end = chr(ord('a') + $x) . '8';
     $row = Board::squares_in_line($row_start, $row_end);
     $col = Board::squares_in_line($col_start, $col_end);
     $squares = array_merge($squares, $row, $col);
     #Removes current position square
     $squares = preg_grep("/^{$csq}\$/", $squares, PREG_GREP_INVERT);
     return $squares;
 }

 /**
  * Takes two parameters containing the name of the square to move from and 
  * the name of the square to move to. They should be validated with 
  * "square_is_valid()" in Board before calling. Optionally takes a 
  * third parameter, which can be set to zero to indicate that no legality 
  * checking should be done. In this case, flags indicating 'en passant' pawn 
  * captures or castling will not be set! Only by entirely validating the move 
  * do these flags have any meaning. The default is to validate every move. 
  * 
  * @param string $sq1 current position of the piece
  * @param string $sq2 destination of the piece
  * @param bool $validate whether to validate the move 
  * 
  * @return MoveListEntry|NULL a MoveListEntry representing the move just made or NULL
  * if any errors occur and the move was not considered  
  */
 public function make_move($sq1, $sq2, $validate = true)
 {
     $move = NULL;
     #Invalid square
     if (Board::square_is_valid($sq1) == false) {
         return NULL;
     }
     if (Board::square_is_valid($sq2) == false) {
         return NULL;
     }
     if ($validate) {
         if ($this->is_move_legal($sq1, $sq2) == false) {
             return NULL;
         }
     }
     $player1 = $this->players[0];
     $player2 = $this->players[1];
     $board = $this->board;
     $piece = $board->get_piece_at($sq1);
     $player = $piece->get_player();
     #if no piece at sq1
     if ($piece == NULL) {
         return NULL;
     }
     $movelist = $this->movelist;
     $capture = $board->get_piece_at($sq2);
     $flags = 0x0;
     if ($validate && $piece instanceof Pawn) {
         if ($player == $player1) {
             if (Board::vert_distance("d8", $sq2) == 0) {
                 $flags = $flags | self::__MOVE_PROMOTE__;
             }
             //Bitwise Or
         } else {
             if (Board::vert_distance("d1", $sq2) == 0) {
                 $flags = $flags | self::__MOVE_PROMOTE__;
             }
             //Bitwise Or
         }
     }
     if ($capture) {
         $flags = $flags | self::__MOVE_CAPTURE__;
         //Bitwise Or
         $capture->set_captured(1);
         $board->set_piece_at($sq1, NULL);
         $board->set_piece_at($sq2, $piece);
         $piece->set_current_square($sq2);
         $piece->set_moved(1);
         $move = $movelist->add_move($piece, $sq1, $sq2, $flags);
         $movenum = $move->get_move_num();
         $this->captures[$player][$movenum] = $capture;
     } else {
         if ($validate && $piece instanceof Pawn && $this->_is_valid_en_passant($piece, $sq1, $sq2)) {
             $last_moved = $movelist->get_last_moved();
             $move = $movelist->get_move($movelist->get_move_num(), $last_moved);
             $capture = $move->get_piece();
             $flags = $flags | self::__MOVE_CAPTURE__;
             $flags = $flags | self::__MOVE_EN_PASSANT__;
             $capture->set_captured(1);
             $board->set_piece_at($sq1, NULL);
             $board->set_piece_at($sq2, $piece);
             $piece->set_current_square($sq2);
             $move = $movelist->add_move($piece, $sq1, $sq2, $flags);
             $this->analyzed = 0;
             $movenum = $move->get_move_num();
             $piece->_set_firstmoved($movenum);
             $this->captures[$player][$movenum] = $capture;
         } else {
             if ($validate && $piece instanceof King) {
                 if ($this->_is_valid_short_castle($piece, $sq1, $sq2)) {
                     $flags = $flags | self::__MOVE_CASTLE_SHORT__;
                 }
                 if ($this->_is_valid_long_castle($piece, $sq1, $sq2)) {
                     $flags = $flags | self::__MOVE_CASTLE_LONG__;
                 }
             }
             if ($flags & self::__MOVE_CASTLE_SHORT__ || $flags & self::__MOVE_CASTLE_LONG__) {
                 $rook_sq = $king_sq = $rook_sq_new = $king_sq_new = NULL;
                 $rook = $king = NULL;
                 if ($player == $player1) {
                     $rook_sq = $flags & self::__MOVE_CASTLE_SHORT__ ? "h1" : "a1";
                     $rook_sq_new = $flags & self::__MOVE_CASTLE_SHORT__ ? "f1" : "d1";
                     $king_sq = "e1";
                     $king_sq_new = $flags & self::__MOVE_CASTLE_SHORT__ ? "g1" : "c1";
//.........这里部分代码省略.........