I recently became interested in Inverse Kinematics (IK). In case you don’t know what that is you can read about it here . The best way to learn about something you find interesting is to do it and you can see the fruits of my labor here . IK has been done in Flash before but I think this is the first time it has been done numerically (as opposed to analytically) and with a DAE model.
It probably won’t seem very interesting or practical unless you’re a math junky or an animator respectively. For the math people, I use the Jacobian transpose method and numerical approximation to track the target with the effector. You can read about that here and here . For the animators, once I managed to wrap my head around the math, it wasn’t difficult to make a simple application like this. It might be possible to do something like interactive footsteps if I can get a hold of a robust matrix math class for AS3.
Better demos are on the way. This one was just to show that I have a handle on the math.