processing + propane sketch

0516_the_bounds_of_a_circle.rb

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

# the bounds of a circle  
# propane graffiti by 8mana
# based on code by Casey Reas and Ben Fry

class CircleBounds < Propane::App
  def settings
    size 240, 120
  end

  def setup
    sketch_title 'the bounds of a circle'
    $x = 120
    $y = 60 
    $radius = 12
    ellipseMode RADIUS
  end 
    
  def draw
    background 204
    d = dist mouseX, mouseY, $x, $y
    if d < $radius
      $radius += 1
      fill 0
    else
      fill 255
    end
    ellipse $x, $y, $radius, $radius
  end
end

CircleBounds.new