Curve deformation 2003-11-25 - By Halvorson, Rob (STP)
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I was about to comment on the same point Andy pointed out about the potential
problem with curve parameterization. If your curve is simple it probably won't
be a problem.
I've had a lot of success using spline IK and motion paths for demo'ing wires
and tubes. Bind a high span cylinder to 20-50 joints (depending on how twisty
the curve is), spline IK the joints to a curve then set the root joint to a
motion path on the curve. Now the curve can have 1 or dozens of spans but your
surface will keep even isoparms. It also allows you to part connectors or
whatever at the end which you can't easily do with animating the extrude.
Robbie Halvorson
Mechanical Designer, Animator
Guidant Corporation, CRM
St Paul, MN USA
651-582-5833
www.guidant.com
> -- --Original Message-- --
> From: maya-bounce@(protected) [mailto:maya-bounce@(protected)]On
> Behalf Of Andy Rawling
> Sent: Tuesday, November 25, 2003 12:17 PM
> To: maya@(protected)
> Subject: Re: Curve deformation
> 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
>>
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