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              <html>
  <head>
    <script src="http://wellcaffeinated.net/PhysicsJS/examples/physicsjs-full.js"></script>
  </head>
  <body>
    <canvas id="viewport"></canvas>
  </body>
</html>

            
          
!
            
              html, body
  background: #eee
  
#viewport
  border: 1px solid black
  width: 250px
  height: 250px
  display: block
  margin: 50px auto
            
          
!
            
              Physics (world) ->
  # create a canvas renderer
  renderer = Physics.renderer 'canvas',
    el: 'viewport'
    width: 250
    height: 250
    #debug: true
  
  # load the ChallengePost Logo
  cpLogo = new Image()
  cpLogo.src = 'http://i.pb.lc/image/0T2I3x1L1u0w/cplogo.png'
  
  # num bodies to create
  nbLogos = 5
  rect = [
    { x: 0, y: 18 }
    { x: 18, y: 0 }
    { x: -0, y: -18 }
    { x: -18, y: -0 }
  ]
  
  # create bodies stored in array
  logos = for i in [1..nbLogos]
    Physics.body 'convex-polygon',
      vertices: rect
      restitution: 0.95
      mass: 0.5
      x: Math.random() * 220
      y: Math.random() * 100 + 50
      vx: i * .01
      vy: (nbLogos - i + 1) * 0.01
      mass: i * .25
      view: cpLogo
       
  # add the bodies to the world  
  world.add logos
  
  # render the world on every step
  world.subscribe 'step', ->
    world.render()
 
  bounds = Physics.aabb(0, 0, 250, 250)
  world.add [
    renderer
    Physics.behavior 'constant-acceleration'
    Physics.behavior 'edge-collision-detection',
      aabb: bounds
      restitution: 1.05
    Physics.behavior 'body-impulse-response'
    Physics.behavior 'sweep-prune'
    Physics.behavior 'body-collision-detection'
  ]
  
  # subscribe to an animation loop and step the world every time
  Physics.util.ticker.subscribe ( time, dt ) ->
    world.step(time)
    
  # start the animation loop
  Physics.util.ticker.start()
            
          
!
999px
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