# File lib/gruff/scatter.rb, line 63
  def draw
    super
    return unless @has_data

    # Check to see if more than one datapoint was given. NaN can result otherwise.  
    @x_increment = (@column_count > 1) ? (@graph_width / (@column_count - 1).to_f) : @graph_width

    #~ if (defined?(@norm_y_baseline)) then
      #~ level = @graph_top + (@graph_height - @norm_baseline * @graph_height)
      #~ @d = @d.push
      #~ @d.stroke_color @baseline_color
      #~ @d.fill_opacity 0.0
      #~ @d.stroke_dasharray(10, 20)
      #~ @d.stroke_width 5
      #~ @d.line(@graph_left, level, @graph_left + @graph_width, level)
      #~ @d = @d.pop
    #~ end

    #~ if (defined?(@norm_x_baseline)) then
      
    #~ end

    @norm_data.each do |data_row|      
      data_row[DATA_VALUES_INDEX].each_with_index do |data_point, index|
        x_value = data_row[DATA_VALUES_X_INDEX][index]
        next if data_point.nil? || x_value.nil? 

        new_x = get_x_coord(x_value, @graph_width, @graph_left)
        new_y = @graph_top + (@graph_height - data_point * @graph_height)

        # Reset each time to avoid thin-line errors
        @d = @d.stroke data_row[DATA_COLOR_INDEX]
        @d = @d.fill data_row[DATA_COLOR_INDEX]
        @d = @d.stroke_opacity 1.0
        @d = @d.stroke_width clip_value_if_greater_than(@columns / (@norm_data.first[1].size * 4), 5.0)

        circle_radius = clip_value_if_greater_than(@columns / (@norm_data.first[1].size * 2.5), 5.0)
        @d = @d.circle(new_x, new_y, new_x - circle_radius, new_y)
      end
    end

    @d.draw(@base_image)
  end