# File lib/rqrcode/qrcode/qr_util.rb, line 221
    def QRUtil.demerit_points_3_dangerous_patterns(modules)
      demerit_points = 0
      module_count = modules.size

      # level 3
      modules.each do |row|
        (module_count - 6).times do |col_idx|
          if row[col_idx] &&
             !row[col_idx + 1] &&
             row[col_idx + 2] &&
             row[col_idx + 3] &&
             row[col_idx + 4] &&
             !row[col_idx + 5] &&
             row[col_idx + 6]
            demerit_points += DEMERIT_POINTS_3
          end
        end
      end

      (0...module_count).each do |col|
        (0...(module_count - 6)).each do |row|
          if modules[row][col] &&
             !modules[row + 1][col] &&
             modules[row + 2][col] &&
             modules[row + 3][col] &&
             modules[row + 4][col] &&
             !modules[row + 5][col] &&
             modules[row + 6][col]
            demerit_points += DEMERIT_POINTS_3
          end
        end
      end

      return demerit_points
    end