I'd like to encapsulate my PIXI rendering in a JavaScript Prototype Object-Oriented fashion. The problem I'm running into is that there is no 'this' object when my animate method is invoked as the callback from requestAnimationFrame(). Can someone suggest a means to do this? I realize this is likely just a general JavaScript issue, as opposed to something related to PIXI, so sorry if this is trivial. Thank you in advance of any help you can provide! Here is what I believe is the minimal cod