Easy-peasy

Robert Penner’s Easing Equations have been built into Flash since version 6 or 7 as the Tween class (search your Flash directory for Tween.as). But before those days, we had to do things manually. Penners equations in Actionscript are available for download here, with a nice little application to visualize each one here. This is great for when you need to port tweening into a different language like Processing or Openframeworks

Link

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