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Boucha
07-20-2011, 04:07 AM
I have seen people and me myself using twist joint setup (usually while rigging forearm twist) using the good old rotational weighted constraints or direct rotational connection with offset values to give even twisting. It works great for straight aligned joint rotated or twisted in just single direction for example rotate X, but once you start rotating in all direction which we all tend to, some thing weird happens, something not so good that is known as flipping. This flipping behavior is the result of GIMBAL LOCK! Well then, that is a major issue :)

I have blogged a little overview about how we can avoid this : http://suchanspot.blogspot.com/2011/07/twist-joint-setup-overview.html

I hope this post could be useful!

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07-20-2011, 04:07 AM
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