draw_line_markers (Gruff::Net)

    # File lib/gruff/net.rb, line 75
      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