propane sketch

0807_owls_of_different_sizes.rb

#!/usr/bin/env jruby
# frozen_string_literal: false
require 'propane'

# owls of different sizes 
# propane graffiti by 8mana
# based on code by Casey Reas and Ben Fry

class SizeOwls < Propane::App
  def settings
    size 480, 120 
  end

  def setup
    sketch_title "owls of different sizes"
  end

  def draw
    background 204
    random_seed 0
    i = 35

    while i < width + 40 do
      gray = rand 102
      scalar = rand 0.25..1.0
      owl i, 110, gray, scalar
      i += 40
    end
  end

  def owl(x,y,g,s)
    push_matrix
    translate x, y
    scale s
    stroke g
    stroke_weight 70
    line 0, -35, 0, -65  # body
    no_stroke
    fill 255-g
    ellipse -17.5, -65, 35, 35  # left eye dome
    ellipse 17.5, -65, 35, 35  # right eye dome
    arc 0, -65, 70, 70, 0, PI  # chin
    fill g
    ellipse -14, -65, 8, 8  # left eye
    ellipse 14, -65, 8, 8 # right eye
    quad 0, -58, 4, -51, 0, -44, -4, -51 # beak
    pop_matrix
  end
end

SizeOwls.new