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where extrusions are concerned the flipping has nothing to do with upvectors, it’s at points of inflexion - points on the curve where the centre of curvature flops from one side of the curve to the other, where the proplem lies. If normal/binormal/tangent is calculated properly this won’t happen. Unfortunately it’s not always done properly
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if you use an envelope with constrained nulls for deformers up-vectoring will determine the transforms :)
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[quote=ThE_JacO;6450]if you use an envelope with constrained nulls for deformers up-vectoring will determine the transforms :)
which is why I said where extrusions are concerned. (kissy, kissy)
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Apologies for that.
I only read one word every three or four of your posts first line usually, so to me that read:
“where concerned has to upvectors”
The rest I usually try to guess. It makes forum reading a lot more fun.
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Hey pooby
dont know if this would help, its a stretchy spine set up from Charbel Koueik does in his riggin pro DVD.
in the scene it looks a bit wierd maybe because there are only like 7 deformers or what ever. but take a look break it down.
in basics the curve drives the bones, which drive the cubes which take the rotation influence from the controls at either end, so a fal off from one to the other.
hope it can help.
ximage
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