title: how does famo.us perpective work?
body: <p>I'm trying to figure out how works famo.us perspective transformation.</p>
  
  <p>I assume that famo.us use one-point perspective which means that new image is just intersections of plane (some plane with different z coordinate) with lines coming from the focal point to the original image.</p>
  
  <p>I also assume that declaration <code>context.setPerspective(100)</code> sets distance from focal point to the original image (screen).</p>
  
  <p>this means that <code>Transform.translate(0, 0, -50)</code> of the image should make new image 2 times smaller But it doesn't!!</p>
  
  <p>I didn't find any information about this in famo.us docs.</p>
  
  <p>Any ideas?<br>
  P.S: I need to calculate translate distance to fill screen width with the image (and I don't want to use scale).  </p>