Re: rigging dilemma: driving a parent with attributes of the child

[Rafe Sacks <rafes(at)al.com.au>]

You can break the cycle by playing with the kinematics inheritance options but I don't think you'll get the relationship you want without a cycle problem in XSI. However, I'm sure you can get the same behavior using an alternate setup method. I have never seen a Maya setup whose resulting behavior couldn't be reproduced in XSI.

________________________________
R A F E   S A C K S
Lead Character TD - Technical
Animal Logic Film
+612  9383 - 4800

kim aldis wrote:

Because the rotation of the parent is driven by the child, but the rotation
of the parent affects the position of the child, which then affects the
direction of the parent, which affects the rotation of the child ..... 

  

-----Original Message-----
From: owner-xsi(at)Softimage.COM 
[mailto:owner-xsi(at)Softimage.COM] On Behalf Of Andre DeAngelis
Sent: 28-February-2006 19:04
To: XSI(at)Softimage.COM
Subject: RE: rigging dilemma: driving a parent with 
attributes of the child

There is only one parameter dependency here. 

If you parent one null to another and then apply a direction 
constraint to the parent (to point to the child) it workd just dandy.

In fact, you can continur to rotate the parent in branch 
mode, to offset the whole set-up.

Am I missing something here? 

-----Original Message-----
From: owner-xsi(at)Softimage.COM 
[mailto:owner-xsi(at)Softimage.COM] On Behalf Of kim aldis
Sent: Tuesday, February 28, 2006 1:48 PM
To: XSI(at)Softimage.COM
Subject: RE: rigging dilemma: driving a parent with 
attributes of the child

	I'd be intrigued to see how, as rob says, the child is 
dependant upon the parent which is dependant upon the child, 
which is dependant upon the parent which is dependant upon 
the child which ...... And the whole thing rapidly crawls up 
it's own arse. Whichever software you use.
Would have been the same in SI3D too.

    

-----Original Message-----
From: owner-xsi(at)Softimage.COM
[mailto:owner-xsi(at)Softimage.COM] On Behalf Of David Gallagher
Sent: 28-February-2006 18:39
To: XSI(at)Softimage.COM
Subject: Re: rigging dilemma: driving a parent with 
      

attributes of the 
    

child


Maya has its benefits. It handles this situation better 
      

unfortunately.
    

I don't see how you can avoid a cycle.

As soon as you tranlsate the child in negative Y the 
        

parent rotates 
    

causing the child to move causing the parent to rotate 
        

causing the 
    

child to move...

_rob
        

--
David Gallagher
Animator, Blue Sky Studios

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