class Rook

Rook piece for a game of chess

Public Class Methods

new(color, position) click to toggle source

Initializes a new rook piece with color and position.

@param [String] color A string denoting the color of the piece. @param [Array<Integer>] position An integer array of length 2 denoting the location of the piece on the board.

Calls superclass method ChessPiece::new

# File lib/chess_pieces/rook.rb, line 13
def initialize(color, position)
  @move_tree_template = build_rook_move_tree
  super(color == 'white' ? '♜'.white : '♖', color, position, 5)
end

Protected Instance Methods

build_rook_move_tree() click to toggle source

Builds the Rook's move tree. The Rook can move horizontally and vertically as far as the board permits.

@return [MoveTree] move_tree_template A move tree template for the rook.

# File lib/chess_pieces/rook.rb, line 25
def build_rook_move_tree
  move_tree = MoveTree.new([0, 0])

  # Build in each of the four directions the rook can go.
  move_tree.root.add_child(build_directional_tree_nodes([1, 0]))
  move_tree.root.add_child(build_directional_tree_nodes([-1, 0]))
  move_tree.root.add_child(build_directional_tree_nodes([0, 1]))
  move_tree.root.add_child(build_directional_tree_nodes([0, -1]))

  move_tree
end