CGTalk - dynamic pivots

BigSquirm

02-02-2004, 10:11 PM

Hi.
As part of a facial rig I've been working on, I'm trying to make an object (a lower lip control) use another object's (the jaw bone's) pivot point for x rotations. All other xforms would be based on its own pivot. The two objects will not be linked, but the lip control will inherit some of the jaw bone's rotation, if that matters. I have been banging my head against the wall trying to use the about context in a float script controller on the x rotation, but that doesnt seem to be working. Any and all help would be extremely appreciated.
thanks.

magicm

02-03-2004, 09:12 AM

Have you tried using wire parameters?
Should be easy to setup

BigSquirm

02-03-2004, 07:33 PM

Thanks for the reply.
I have tried wiring, but when wired the object still rotates about its own pivot. I need for it to rotate about another object's pivot. Am I just missing something totally obvious because everything I've tried has failed. Thanks again for the help.

magicm

02-06-2004, 08:58 AM

Okay, now that I've read your post again I see that this isn't as easy as I said before. In the meantime I've been trying several approaches (reactor controller, script controller, wired xfrom modifier) but none of them had the desired results. Have you come to anything yet? I'll let you know when I have.

- Martijn

charleyc

02-06-2004, 05:20 PM

could you link a reference object to the jaw bone and place it near the lip control, and use its position with the lip as aposed to x_rotation?

Also, I have been playing with quaternians and I have accidentally gotten rotation about axis other then the objects. You may find what you need with those.

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