title: HTML5 Canvas shape from circle to triangle
body: <p>I've been looking around and I can't seem to find a clear way in which I can animate a shape to change from a circle to a triangle or to a rectangle or the other way around. I would assume that I could somehow store the shape and change its attributes in order to convert it.</p>
  
  <p>Basically what I am asking is, how can I draw a circle and then animate it to a triangle on the click of a button? Is that possible with canvas shapes?</p>
  
  <p>Thanks!</p>