title: 2D distortion of a face from an image on iOS? (similar to Fat Booth etc.)
body: <p>I was just wondering if someone knows about some good library or tutorial on how to achieve a 2D distortion of a face taken from an image taken by the user.</p>
  
  <p>I would like to achieve a similar effect to the one in Fatify, Oldify, all those Fat Booths, etc., because I am creating an app where you will throw something at the face and I would the face to jiggle and move when the object hits it.</p>
  
  <p>How should I do this?</p>