Class: RGnuchess::Board::Piece

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

Overview

Piece represents a single chess piece on a board

Constant Summary collapse

Pieces = 
{"P"=>:pawn,"R"=>:rook,"N"=>:knight,"B"=>:bishop,"K"=>:king,"Q"=>:queen,"."=>:empty}
Pieces_reverse = 
Pieces.invert

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(color = :white, piece = :empty) ⇒ Piece

Returns a new instance of Piece.



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# File 'lib/rgnuchess.rb', line 119

def initialize( color=:white, piece=:empty )
  @color, @piece = color, piece
end

Instance Attribute Details

#color ⇒ Object (readonly)

Returns the value of attribute color.



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# File 'lib/rgnuchess.rb', line 133

def color
  @color
end

#piece ⇒ Object (readonly)

Returns the value of attribute piece.



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# File 'lib/rgnuchess.rb', line 133

def piece
  @piece
end

Class Method Details

.parse(char) ⇒ Object

parse a character of gnuchess output from a board into a piece



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# File 'lib/rgnuchess.rb', line 114

def Piece.parse(char)
  color = (char.upcase==char) ? :white : :black #upper case = white
  piece = Pieces[char.upcase]
  Piece.new(color,piece)
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/rgnuchess.rb', line 122

def ==(other)
  other.color==@color && other.piece==:piece
end

#to_s ⇒ Object 



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# File 'lib/rgnuchess.rb', line 125

def to_s
  s=Pieces_reverse[@piece]
  if @color==:white
    s
  else
    s.downcase
  end
end