Class: Board

Inherits:
Object
  • Object
show all
Defined in:
lib/board.rb

Constant Summary collapse

BackRow = 
{ white: 7, black: 0 }

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(flag = false) ⇒ Board

Returns a new instance of Board.



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# File 'lib/board.rb', line 6

def initialize(flag = false)
  @board = []
  8.times do |y| 
    row = [] 
    8.times {|x| row << EmptySpace.new(x,y)}
    @board << row
  end 

  unless flag
    pieces = []
    8.times do |x|
      pieces << BlackPawn.new(x,6) << WhitePawn.new(x,1)
    end

    [0,7].each do |x|
      pieces << BlackRook.new(x,7) << WhitePawn.new(x,0)
    end

    [1,6].each do |x|
      pieces << BlackKnight.new(x,7) << WhiteKnight.new(x,0)
    end

    [2,5].each do |x|
      pieces << BlackBishop.new(x,7) << WhiteBishop.new(x,0)
    end 

    pieces << BlackQueen.new(4,7) << WhiteQueen.new(3,0)
    pieces << BlackKing.new(3,7)  << WhiteKing.new(4,0)

    pieces.each {|piece| place(piece)}
  end

  @en_passent = NullSpace.new
end

Instance Attribute Details

#board ⇒ Object

Returns the value of attribute board.



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# File 'lib/board.rb', line 5

def board
  @board
end

#en_passent ⇒ Object

Returns the value of attribute en_passent.



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# File 'lib/board.rb', line 5

def en_passent
  @en_passent
end

Class Method Details

.board_safe(points) ⇒ Object 



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# File 'lib/board.rb', line 61

def self.board_safe(points)
  points.select do |point| 
    not(point.any? {|cord| cord < 0 or cord > 7})
  end 
end

Instance Method Details

#at(x, y) ⇒ Object 



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# File 'lib/board.rb', line 49

def at(x,y)
  board[y][x]
end

#enemies(piece) ⇒ Object 



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# File 'lib/board.rb', line 53

def enemies(piece)
  board.flatten.select {|other| other.enemy_of?(piece)}
end

#move(piece, x, y) ⇒ Object 



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# File 'lib/board.rb', line 57

def move(piece, x, y)
  piece.move(self, x, y)
end

#place(piece) ⇒ Object 



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# File 'lib/board.rb', line 41

def place(piece)
  piece.place_on(self)
end

#remove(piece) ⇒ Object 



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# File 'lib/board.rb', line 45

def remove(piece)
  piece.remove_from(self)
end

#to_s ⇒ Object 



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# File 'lib/board.rb', line 67

def to_s
  out = "\s\s"
  out << (0..7).to_a.join(' ') << "\n" 

  @board.each_with_index do |row, i| 
    out << "#{i} " << (row.collect{|pc| pc.to_s}).join('') << "\n"
  end
  
  out
end