title: How to draw in javascript canvas and compare it to a shape?
body: <p>so to keep it short I'm wondering how would I be able to track a user drawing from the moment they click to when they let go and compare it to check its accuracy with say, a perfect circle?</p>
  
  <p>Would this be possible, and if so what are the best ways to check its accuracy compared to a perfect circle and how?</p>
  
  <p>Also thinking of this like if the user has drawn a circle but the start and end points don't exactly meet, maybe draw a line to connect them, etc?</p>