game_obj1.rb

tako_src = <<EOS
1C00: 00 00 39 79 7A 6E EC FA FA EC 6E 7A 79 39 00 00 
EOS

beam_src = <<EOS
1C90: 0F    ; ++++....
EOS

@field = Array.new(16) { Array.new(32,0) }#[([false] * 32).dup] * 16

def src2a src
  src.each_line.map do |line|
    line.split(/\:/).last.split(/\;/).first.split(/\s/)[1..-1].map{|e| e.to_i(16)}
  end.flatten
end

def draw image, x, y, collision = false
  hit = false
  image.each_with_index do |d, dx|
    8.times do |dy|
      if (d & 1) == 1
        case @field[x + dx][y + dy]
        when 1
          if collision
            @field[x + dx][y + dy] = 2
            hit = true
          else
            @field[x + dx][y + dy] = 1
          end
        else
          @field[x + dx][y + dy] = 1
        end
      end
      d >>= 1
    end 
  end
  hit
end

def erase image, x, y
  image.each_with_index do |d, dx|
    8.times do |dy|
      @field[x + dx][y + dy] = 0 if (d & 1) == 1
      d >>= 1
    end 
  end
end

def show_field
  s = @field.map do |row|
    row.map do |d|
      case d
      when 0
        '  '
      when 1
        '. '
      when 2
        '* '
      end
    end.join("")
  end.join("\n")
  puts s
end

def rollback
  print "\e[16A"
end

tako = src2a tako_src
beam = src2a beam_src

spd = 4
5.times do |i|
  erase beam, 8, i * spd
  draw tako, 0, 16
  hit = draw beam, 8, (i + 1) * spd, true
  break if hit
  show_field
  sleep 1
  rollback
end
show_field