I had the idea when Flash CS4 came out to create a tool that recorded drawing in real-time and created a tween based on that drawing. Because of the slick new object-tween in Flash CS4, the tween could be created with just a start and end keyframe, but at the same time, the motion path could be incredibly complex. Additionally, all of the timing could be stored within a single easing curve. The resulting tween would be super clean and super editable. So I was fairly disappointed to find out that none of this new functionality had been included in the JSFL (extensibility) API when Flash CS4 came out. After a lot of digging behind the scenes in the Flash application, as well as a very useful article and helpful correspondence from Flash engineer John Mayhew, I came up with a way to accomplish this extension. I will cover the somewhat daunting technical details of this process in a future another post (UPDATE: technical post now available). For now, enjoy the extension!
Want to see it in action? Check out the MotionSketch video demo.
UPDATE (5/1/09): Released the Actionscript class to produce the write-in effect shown in the demo.
(Compatibility: Flash CS4)
Thanks again to John Mayhew, Jen DeHaan, and Richard Galvan @ Adobe.
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