title: How can I change an object's rate of rotation in OpenGL?
body: <p>I'm working with a simple rotating polygon that should speed up when the user clicks and drags upwards and show down when the user clicks and drags downward. Unfortunately, I have searched EVERYWHERE and cannot seem to find any specific GL function or variable that will easily let me manipulate the speed (I've searched for "frame rate," too...)</p>
  
  <p>Is there an easy call/series of calls to do something like this, or will I actually need to do things with timers at different segments of the code? </p>