--- /dev/null
+
+require File.dirname(__FILE__) + '/base'
+
+# Experimental!!! See also the Spider graph.
+class Gruff::Net < Gruff::Base
+
+ # Hide parts of the graph to fit more datapoints, or for a different appearance.
+ attr_accessor :hide_dots
+
+ def initialize(*args)
+ super
+
+ @hide_dots = false
+ end
+
+ def draw
+
+ super
+
+ return unless @has_data
+
+ @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
+
+ @x_increment = @graph_width / (@column_count - 1).to_f
+ circle_radius = clip_value_if_greater_than(@columns / (@norm_data.first[1].size * 2.5), 5.0)
+
+ @d = @d.stroke_opacity 1.0
+ @d = @d.stroke_width clip_value_if_greater_than(@columns / (@norm_data.first[1].size * 4), 5.0)
+
+ if (defined?(@norm_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
+
+ @norm_data.each do |data_row|
+ prev_x = prev_y = nil
+ @d = @d.stroke data_row[DATA_COLOR_INDEX]
+ @d = @d.fill data_row[DATA_COLOR_INDEX]
+
+ data_row[1].each_with_index do |data_point, index|
+ next if data_point.nil?
+
+ rad_pos = index * Math::PI * 2 / @column_count
+ point_distance = data_point * @radius
+ start_x = @center_x + Math::sin(rad_pos) * point_distance
+ start_y = @center_y - Math::cos(rad_pos) * point_distance
+
+ next_index = index + 1 < data_row[1].length ? index + 1 : 0
+
+ next_rad_pos = next_index * Math::PI * 2 / @column_count
+ next_point_distance = data_row[1][next_index] * @radius
+ end_x = @center_x + Math::sin(next_rad_pos) * next_point_distance
+ end_y = @center_y - Math::cos(next_rad_pos) * next_point_distance
+
+ @d = @d.line(start_x, start_y, end_x, end_y)
+
+ @d = @d.circle(start_x, start_y, start_x - circle_radius, start_y) unless @hide_dots
+ end
+
+ end
+
+ @d.draw(@base_image)
+ end
+
+
+ # the lines connecting in the center, with the first line vertical
+ 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
+
+private
+
+ def draw_label(center_x, center_y, angle, radius, amount)
+ r_offset = 1.1
+ x_offset = center_x # + 15 # The label points need to be tweaked slightly
+ y_offset = center_y # + 0 # This one doesn't though
+ x = x_offset + (radius * r_offset * Math.sin(angle.deg2rad))
+ y = y_offset - (radius * r_offset * Math.cos(angle.deg2rad))
+
+ # Draw label
+ @d.fill = @marker_color
+ @d.font = @font if @font
+ @d.pointsize = scale_fontsize(20)
+ @d.stroke = 'transparent'
+ @d.font_weight = BoldWeight
+ s = angle.deg2rad / (2*Math::PI)
+ @d.gravity = SouthGravity if s >= 0.96 or s < 0.04
+ @d.gravity = SouthWestGravity if s >= 0.04 or s < 0.21
+ @d.gravity = WestGravity if s >= 0.21 or s < 0.29
+ @d.gravity = NorthWestGravity if s >= 0.29 or s < 0.46
+ @d.gravity = NorthGravity if s >= 0.46 or s < 0.54
+ @d.gravity = NorthEastGravity if s >= 0.54 or s < 0.71
+ @d.gravity = EastGravity if s >= 0.71 or s < 0.79
+ @d.gravity = SouthEastGravity if s >= 0.79 or s < 0.96
+# @d.gravity = NorthGravity
+ @d.annotate_scaled(@base_image, 0, 0, x, y, amount, @scale)
+ end
+
+end
+
+# # This method is already in Float
+# class Float
+# # Used for degree => radian conversions
+# def deg2rad
+# self * (Math::PI/180.0)
+# end
+# end
+
+
+