sprite_limit.rb

class Star
  attr_sprite

  def initialize
    @x = (1280 * rand) * -1
    @y = (720 * rand) * -1
    @s = 1 + rand * 3
    @w = 16
    @h = 16
    @path = "sprites/star.png"
  end

  def update
    @x += @s
    @y += @s
    @x = 0 if @x > 1280
    @y = 0 if @y > 720
  end
end

def tick args
  args.state.stars ||= 10000.map { Star.new }
  args.outputs.background_color = [0, 0, 0]
  args.outputs.solids << [0, 680, 100, 100, 255, 255, 255]
  args.outputs.labels << [30, 710, "#{args.gtk.current_framerate}"]
  if args.state.tick_count == 0
    args.outputs.static_sprites << args.state.stars
  end
  args.state.stars.each(&:update)
end

$gtk.reset seed: Time.now.to_i