class Gruff::Bezier
Gruff::Bezier
is a special line graph that have the bezier curve.
Here’s how to set up a Gruff::Bezier
.
dataset = [ +0.00, +0.09, +0.19, +0.29, +0.38, +0.47, +0.56, +0.64, +0.71, +0.78, +0.84, +0.89, +0.93, +0.96, +0.98, +0.99, +0.99, +0.99, +0.97, +0.94, +0.90, +0.86, +0.80, +0.74, +0.67, +0.59, +0.51, +0.42, +0.33, +0.23, +0.14, +0.04, -0.06, -0.16, -0.26, -0.36, -0.45, -0.53, -0.62, -0.69, -0.76, -0.82, -0.88, -0.92, -0.96, -0.98, -1.00, -1.00, -1.00, -0.99, -0.96, -0.93, -0.89, -0.84, -0.78, -0.71, -0.64, -0.56, -0.47, -0.38, ] g = Gruff::Bezier.new g.data 'sin', dataset g.write('bezier.png')
Private Instance Methods
Source
# File lib/gruff/bezier.rb, line 26 def draw_graph x_increment = (@graph_width / (column_count - 1)).to_f renderer_class = RUBY_PLATFORM == 'java' ? Gruff::Renderer::Polyline : Gruff::Renderer::Bezier stroke_width = clip_value_if_greater_than(@columns / (store.norm_data.first.points.size * 4.0), 5.0) store.norm_data.each do |data_row| next if data_row.points.empty? poly_points = [] data_row.points.each_with_index do |data_point, index| data_point = data_point.to_f # Use incremented x and scaled y new_x = @graph_left + (x_increment * index) new_y = @graph_top + (@graph_height - (data_point * @graph_height)) if index == 0 && RUBY_PLATFORM != 'java' poly_points << new_x poly_points << new_y end poly_points << new_x poly_points << new_y draw_label(new_x, index) end renderer_class.new(renderer, color: data_row.color, width: stroke_width).render(poly_points) end end