title: Flash like Animation ONLY Library for C/C++ (no GUI)
body: <p>I'm looking for an opensource C/C++ library for managing keyframe or time based animation. </p>
  
  <p>I already have a graphic layer, so it doesn't need to do any drawing, I just want it to manage tweening or interpolation very much like Flash does, specifically:</p>
  
  <ul>
  <li>Allows multiple objects to be managed in an overall scene or stage. </li>
  <li>Allows me to string together a series of tweens and it figures out the active tween</li>
  <li>Allows me to jump to any frame for my scene, and it tweens or interpolates the values for all objects in the scene.</li>
  <li>Has variable frame rates for playback. e.g. frame_rate = 1 would play at 1 frame/sec.</li>
  <li>And a total nice to have would be if the stage object could save and load it's state ;-)</li>
  </ul>
  
  <p>I've seen lots of stuff out there for managing a single tween or interpolation, but nothing that seems to wrap up the higher level concepts of running a series of tweens end to end, and coordinating that with the concept of an overall timeline, much like Flash does.</p>