$: << File.expand_path(File.join(File.dirname(__FILE__), '../lib'))
require 'rubygems'
require 'gosu'

include Gosu

class ZOrderTest < Window
  def initialize
    super(640, 480, false)
    @image = Image.new(self, File.join(File.dirname(__FILE__), 'LargeStar.png'))
    @clockwise = 0
    @c_clockwise = 0
  end

  def draw
    @image.draw_rot(320, 240, 3, @c_clockwise, 0.5, 0.5, 0.1, 0.1)
    @image.draw_rot(320, 240, 2, @clockwise, 0.5, 0.5, 0.4, 0.4)
    @image.draw_rot(320, 240, 1, @c_clockwise, 0.5, 0.5, 0.7, 0.7)
    @image.draw_rot(320, 240, 0, @clockwise)
  end

  def update
    @clockwise = (@clockwise + 1) % 360
    @c_clockwise = (@c_clockwise - 1) % 360
    close if button_down? KbEscape
  end
end

ZOrderTest.new.show