Module: Chess::Pieces::BishopMoves

Included in:
Bishop, Queen
Defined in:
lib/chess/pieces/bishop.rb

Overview

BishopMoves

Instance Method Summary collapse

Instance Method Details

#north_east_moves(board, file, rank) ⇒ Object 



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# File 'lib/chess/pieces/bishop.rb', line 33

def north_east_moves(board, file, rank)
  north_east = board.north_east_pos(file, rank)

  moves = []
  while board.empty_at?(*north_east)
    moves << north_east if board.pos_in_range?(north_east)
    north_east = board.north_east_pos(*north_east)
  end
  moves << north_east if board.pos_in_range?(north_east) && board.enemy_at?(*north_east)
  moves
end

#north_west_moves(board, file, rank) ⇒ Object 



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# File 'lib/chess/pieces/bishop.rb', line 9

def north_west_moves(board, file, rank)
  north_west = board.north_west_pos(file, rank)

  moves = []
  while board.empty_at?(*north_west)
    moves << north_west if board.pos_in_range?(north_west)
    north_west = board.north_west_pos(*north_west)
  end
  moves << north_west if board.pos_in_range?(north_west) && board.enemy_at?(*north_west)
  moves
end

#south_east_moves(board, file, rank) ⇒ Object 



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# File 'lib/chess/pieces/bishop.rb', line 45

def south_east_moves(board, file, rank)
  south_east = board.south_east_pos(file, rank)

  moves = []
  while board.empty_at?(*south_east)
    moves << south_east if board.pos_in_range?(south_east)
    south_east = board.south_east_pos(*south_east)
  end
  moves << south_east if board.pos_in_range?(south_east) && board.enemy_at?(*south_east)
  moves
end

#south_west_moves(board, file, rank) ⇒ Object 



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# File 'lib/chess/pieces/bishop.rb', line 21

def south_west_moves(board, file, rank)
  south_west = board.south_west_pos(file, rank)

  moves = []
  while board.empty_at?(*south_west)
    moves << south_west if board.pos_in_range?(south_west)
    south_west = board.south_west_pos(*south_west)
  end
  moves << south_west if board.pos_in_range?(south_west) && board.enemy_at?(*south_west)
  moves
end