title: Touch Events and OpenGL Drawing. Do they occur on separate threads?
body: <p>It appears that touch events are happening on a different thread then OpenGL rendering. Is this the case? The context for this question is a particle system I am building that uses touch events to trigger OpenGL drawing. Since OpenGL drawing is rather heavyweight I am concerned about threading implications.</p>
  
  <p>Any insight would be much appreciated.</p>
  
  <p>Regards,
  Doug</p>