So we can all track an image/null object along a static mask path, but I really need to know how to track something (ideally another composition) along a mask path that moves...
Ive tried searching all over the internet, and get alot of results for static paths and moving text... but nothing for moving along a moving motion path.
What I am trying to do is animate electordes going down a boxers arm as he hits a punch bag... but obviously the line of his arm and muscles moves, so I just want a path to send many many multiples of electrodes down the same path that I have tracked to the muscle movement.
Any help would be greatly appreciated.
One thought is to have multiple mask paths keyframed to follow his arm and use the Vegas effect to add the strokes.
Another thought is to use a particle system, such as Foam where you can effect the path of the particles.
Another thought is to use your favorite particle system (Particular? Wondertouch's ParticleIllusion? CC Particle World?) and use the Puppet tool to move them along the path. Here's a tutorial on that very subject.