Class: Rubylife::Game

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(board = Board.new, seed = []) ⇒ Game

Returns a new instance of Game.



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# File 'lib/rubylife.rb', line 10

def initialize(board=Board.new, seed=[])

  @board = board
  seed.each do |cell|
    board.grid[cell[0]][cell[1]].alive=true
  end

end

Instance Attribute Details

#board ⇒ Object (readonly)

Returns the value of attribute board.



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# File 'lib/rubylife.rb', line 8

def board
  @board
end

Instance Method Details

#tick! ⇒ Object 



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# File 'lib/rubylife.rb', line 19

def tick!

  live_cells = []
  dead_cells = []


  @board.cells.each do |cell|

    # Rule #1:
    # Any live cell with fewer than two live neighbours dies​, as if caused by under­population.
    if (cell.alive? && @board.live_neighbours(cell).size < 2)
      dead_cells << cell
    end

    # Rule #2:
    # Any live cell with two or three live neighbours lives​ on to the next generation.
    if (cell.alive? && (@board.live_neighbours(cell).size == 2 || @board.live_neighbours(cell) == 3))
      live_cells << cell
    end

    # Rule #3:
    # Any live cell with more than three live neighbours dies​, as if by overcrowding..
    if (cell.alive? && @board.live_neighbours(cell).size > 3)
      dead_cells << cell
    end

    # Rule #4:
    # Any dead cell with exactly three live neighbours becomes a live cell,​as if by reproduction.
    if (cell.dead? && @board.live_neighbours(cell).size == 3)
      live_cells << cell
    end

  end

  live_cells.each { |cell| cell.alive = true}
  dead_cells.each { |cell| cell.alive = false}

end