# File lib/gruff/net.rb, line 82
  def draw_line_markers
    return if @hide_line_markers


    # have to do this here (AGAIN)... see draw() in this class
    # because this funtion is called before the @radius, @center_x and @center_y are set
    @radius = @graph_height / 2.0
    @center_x = @graph_left + (@graph_width / 2.0)
    @center_y = @graph_top + (@graph_height / 2.0) - 10 # Move graph up a bit


    # Draw horizontal line markers and annotate with numbers
    @d = @d.stroke(@marker_color)
    @d = @d.stroke_width 1


    (0..@column_count-1).each do |index|
      rad_pos = index * Math::PI * 2 / @column_count

      @d = @d.line(@center_x, @center_y, @center_x + Math::sin(rad_pos) * @radius, @center_y - Math::cos(rad_pos) * @radius)


      marker_label = labels[index] ? labels[index].to_s : '000'

      draw_label(@center_x, @center_y, rad_pos * 360 / (2 * Math::PI), @radius, marker_label)
    end
  end