about this part of your reply:
you mean i can get pan and tilt as outputs from the same nPolyfit?
i thought i will have to do 2 separate nPolyfits one for x/y input and pan output and and other one for x/y input and tilt output.
it sounds like your ofxNonLinearFit code already does what i am planning todo, only that i am feeding it 2d data while you are feeding it 3d data. cool. will have to poke around it.
