Curve deformation 2003-11-25 - By Joey Ponthieux
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Andy Rawling wrote:
>
> Joey Ponthieux wrote:
>
> >Thanks.
> >
> >Elvira, Gyuri,
> > Partial extrude was indeed the simplest method and worked well. I'm
> >embarrassed that I didn't know it was there after working with Maya for
> >over 4 years.
> >
> >Aleksander,
> > Your method, while a bit complicated is extremely intriguing. I've had
> >need to pefom curve deformation on objects in the past and this sound
> >very suitable to teh task. I'm not sure I understand your procedure
> >though. I can get the wire deformer to affect the lattice, but I'm not
> >sure I understand the use of the blend shape. Thanks again.
> >
> >
> >
> The only thing to watch for using partial extrudes (or other modelling
> tools) is that the parameterisation of your surface will change suddenly
> as you animate the subcurve values (you'll get new CVs appearing as your
> surface grows).
>
> This can give you problems with your texture dancing around, so you
> might want to add a rebuild on the surface, with a large fixed number of
> spans - enough to suit your surface at its most extended.
>
> - Andy
>
Andy, Rob,
Thanks for that tip. Currently teh object is not textured so it
shouldnt be a problem. I'm basically try to make a line draw with some
amount of thickness. I could have probably done this as a paint effect
but the line intersects through objects and I didnt want it to get
messy. Thanks.
Aleksander,
I think I understand what you were referring to now. I was able to get
the wire to deform the lattice just fine. I just wasnt sure what you
were using the blendshape for but now I understand you premise for its
use. Thanks.
Jason,
Not to start a flame war or such, but I used Softimage3D prior to
coming to Maya. Softimage3D had one of the coolest "deform by
spline/surface" features I've ever seen. If you created the spline in Y,
and repositioned the object in Y appropriately you could deform any
object, mesh or nurbs, onto the spline. You could also deform any object
to a NURBS surface. By modifying translation, rotation and scale you
could create some realy interest effects. But what was really neat was
that you could animate the object along the spline while it was being
deformed. It's one of the few things I realy miss from Softimage3D, and
as much mastery as Alias has with its NURBS engine, I've never quite
understood why Maya didn't have something similar.
--
Joey Ponthieux
NCI Information Systems Inc.
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.
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