load_library 'context_free'
def setup_the_creature
@creature = ContextFree.define do
rule :start do
split do
11.times do |count| # 11 times increment rotation by 30 degrees
legs :rotation => count * 30
rewind # rewind context
end
legs :rotation => 360
end
end
rule :legs do
circle :hue => 0.15, :saturation => 0.5, :brightness => 1.0, :color => [0.95, 0.15]
legs :y => 0.1, :size => 0.965
end
rule :legs, 0.01 do
circle
split do
legs :rotation => 3
rewind
legs :rotation => -3
end
end
end
end
def setup
size 600, 600
setup_the_creature
no_stroke
color_mode HSB, 1.0
smooth
draw_it
# save_frame("creature.png")
end
def draw
# Do nothing.
end
def draw_it
background -1.0
@creature.render :start, :size => height/5, :stop_size => 0.8,
:start_x => width/2, :start_y => height/3, :color => [0.75, 0.1, 0.9]
end
def mouse_clicked
draw_it
end
Spooky result (makes your processor do a bit of work before it displays)
These are really nice, Martin. You should consider forking the context-free library on GitHub and adding some of these as examples.
ReplyDeleteOne useful point: At the beginning of your definition, you have a long list of repeated "arms, rewind" rules. It's nice for clarity to lay it all out like that, but, because this is Ruby, and you're simply using a DSL, you can stick a loop (or any piece of arbitrary code) in the middle of it. Say, a count up from 0 to 360 in steps of 30, drawing and rewinding with every step.
Cheers,
Jeremy
I was just about to update as suggested when I read your comment as suggested.
ReplyDelete