An Advanced Pretzel

Just another idle context free rule set in ruby processing, whilst I try to figure out how to do a pentaflake.


load_library 'context_free'
def setup_the_spiral
 
  @spiral = ContextFree.define do
    rule :start do
       split do
       star :rotation => 0
       rewind
       star :rotation =>  120
       rewind
       star :rotation =>  240
       end
    end
    rule :base do
       triangle :hue => 0.5
       base :rotation =>  3, :size => 0.98, :x => 0.09
    end
    rule :star do
       split do            
       base :brightness => 0.8, :rotation => 0
       rewind
       base :brightness => 0.8, :rotation =>  40
       rewind
       base :brightness => 0.8, :rotation =>  80
       end
    end
end
end
 
def setup
  size 600, 600
  setup_the_spiral
  no_stroke
  color_mode HSB, 1.0
  smooth
  draw_it
end
 
def draw
  # Do nothing.
end

 
def draw_it
  background 0.33, 0.25, 0.2
  @spiral.render :start, :size => height/5, :color => [0.35, 0.4, 0.9, 0.55], :stop_size => 1,
                       :start_x => width/2, :start_y => height/2
end