Capsule

capsule.rb

# encoding: utf-8

WIDTH = 8
HEIGHT = 16

class Item

end

class Capsule < Item
  def initialize(t)
    @type = t
  end

  def type
    @type
  end

  def character
    return '◯' if @type == :red
    return '●' if @type == :yellow
    return '◎' if @type == :blue
  end

end

def show(field)
  for y in 0...HEIGHT do
    for x in 0...WIDTH do
      if field[x][y].nil?
        print '　'
      else
        print field[x][y].character
      end
    end
    puts
  end
end

field = Array.new(WIDTH).map{ Array.new(HEIGHT, nil) }

field[6][10] = Capsule.new(:red)
field[5][12] = Capsule.new(:blue)
field[2][ 8] = Capsule.new(:yellow)

show(field)