If you want to have a % driven ‘path’ constrain as these examples are a ‘param’ type constraint, Its more complex. If you have a null constrained in the middle, and you pull one end of a curve, it wont react on a param. (unless it only has 2 points) but with a % version, it will always stay at 50% of the length so slide along the curve. I managed to get one working using Nest’s Strandfitting compound and the fit bezier node, but it would be nice for this to be exposed without the faff. Paul
From: olivier jeannel
Sent: Friday, June 28, 2013 12:57 PM
To: softimage@listproc.autodesk.com
Subject: Re: path constraint via ICE
Even better :)
Le 28/06/2013 12:22, Edy Susanto Lim a écrit :
Hi,
If we use object as an upvector, then we don't need the Increment Rotation
with 2 vectors compound. We can just use 'Direction to Rotation' node.
-tangent as 'Point At'
-the position difference of the upvector object position to the curve
position as 'Up Vector'
Cheers,
edy
On Fri, Jun 28, 2013 at 5:58 PM, olivier jeannel <olivier.jean...@noos.fr>
wrote:
I don't know the official way, but since the tangency will control the
rotation on one axis, you just need to add a second Set Rotation that look UP
on another axis.
Like this :
(Local vector set to 0, 1, 0 )
Le 28/06/2013 10:49, Morten Bartholdy a écrit :
Pretty cool Alan! So tangency is controlled in the Increment Rotation
node - how would I control the upvector, say with another null?
To better understand how it works, how come it is necessary to key the
null to zero rot and pos for it to work?
Morten
Den 26. juni 2013 kl. 16:45 skrev Alan Fregtman
mailto:alan.fregt...@gmail.com:
http://s3.darkvertex.com/hlinked/ice/ICE_example_kinematics_pathOrCurveUConstraint.png
Maybe something like this? You may need to do more to deal with the
upvector better if your curve complexity is intense.
On Wed, Jun 26, 2013 at 10:34 AM, Ponthieux, Joseph G.
(LARC-E1A)[LITES] < j.ponthi...@nasa.gov > wrote:
Is there a way to perform a path constraint using ICE?
I’m certain that it can be done but I can’t find a task or tool
prepackaged to do this.
Thanks
--
Joey Ponthieux
LaRC Information Technology Enhanced Services (LITES)
Mymic Technical Services
NASA Langley Research Center
__________________________________________________
Opinions stated here-in are strictly those of the author and do not
represent the opinions of NASA or any other party.
--
Edy Susanto Lim
TD
http://sawamura.neorack.com
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