gosu_game_of_life.rb

# Gosu File
require 'gosu'
require_relative 'game_of_life.rb'

class GameOfLifeWindow < Gosu::Window

  def initialize(height = 1200, width = 800)
    @height = height
    @width = width
    super height, width, false
    self.caption = 'Our Game of Life'

    # Color
    @background_color = Gosu::Color.new(0xffdedede)
    @alive_color = Gosu::Color.new(0xff121212)
    @dead_color = Gosu::Color.new(0xffededed)

    # Game itself
    @cols = width / 10
    @rows = height / 10

    @col_width = width / @cols
    @row_height = height / @rows

    @world = World.new(@cols, @rows)
    @game = Game.new(@world)
    @game.world.randomly_populate
  end

  def update
    update_interval = 1000
    @game.tick!
  end

  def draw
    # Background
    draw_quad(0, 0, @background_color,
              width, 0, @background_color,
              width, height, @background_color,
              0, height, @background_color)

    # Drawing cells
    @game.world.cells.each do |cell|
      if cell.alive?

        draw_quad(cell.x * @col_width, cell.y * @row_height, @alive_color,
                  cell.x * @col_width + (@col_width - 1), cell.y * @row_height, @alive_color,
                  cell.x * @col_width + (@col_width - 1), cell.y * @row_height + (@row_height - 1), @alive_color,
                  cell.x * @col_width, cell.y * @row_height + (@row_height - 1), @alive_color)
      else

        draw_quad(cell.x * @col_width, cell.y * @row_height, @dead_color,
                  cell.x * @col_width + (@col_width - 1), cell.y * @row_height, @dead_color,
                  cell.x * @col_width + (@col_width - 1), cell.y * @row_height + (@row_height - 1), @dead_color,
                  cell.x * @col_width, cell.y * @row_height + (@row_height - 1), @dead_color)
      end
    end
  end

  def needs_cursor?
    true
  end
end

GameOfLifeWindow.new.show