 | | | another mocap newbie question | another mocap newbie question 2004-02-23 - By Jeff Powell
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Hi list,
I'm still bumbling through with my mocap exercise.... basically I import my
data (bvh) and build my rig using the mocap base pose (collection of nulls)
as a guide i.e. I'm drawing chains between the nulls.
I'm then creating parent nulls and constraining these at key locations e.g.
hips, ankle (basically wherever there will be start of a chain) with pos/ori
constraints so they follow the null mocap hierarchy exactly. I'm then making
my chains the children of these parent nulls and constraining their
effectors, so they will follow the mocap null hierarchy exactly.
My thinking is this..........Mocap nulls > drives the parent nulls > drives
the skeleton
I then insert the mocap data motion clips into the imported model'zs mixer
and lo and behold I get my rig moving around as I'd like. So far so good.
The next step is to select all the bones in my rig and plot out the
animation, which would be great but because of the orientation constraints
on the parent nulls I'm getting zero animation on my first bone in a chain
e.g. thigh has no animation, lower leg has animation. If I remove the
orientation constraints I get the animation on the first bone but they
aren't then following the mocap nulls orientation exactly; which sort of
defeats the object and leads to all sorts of other problems. <sigh>.
So basically can anyone please tell me (mail me off-list preferably) how I
can get my chains to follow the exact orientation of the driving mocap nulls
whilst still retaining my local animation on the first bone of a chain? Or
better still point me in the direction of a better way of setting up a
motion capture rig. I'm very new to mocap, so no flames please :�)
Any info would be greatly, greatly appreciated. :�)
many thanks,
Jeff.
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