"Gilles Tran" <tra### [at] inapginrafr> wrote in
news:3ec3c92a$1@news.povray.org: 

...
> Just wondering: is it possible to "warp" a rounded box (bending,
> shearing, twisting...) or another shape? Simple surface displacement
> can be done using the formula above, but I've not been able to create
> more drastic deformations.

The shape in this animation;

http://news.povray.org/povray.binaries.animations/31252/
http://home.no/t-o-k/povray/Quadrivariate_NURBS_Deformation.m1v
(The one on my homepage is of better quality.)

- does not have to be a "cube", it can be any mesh shape you want.

So a lot of different mesh deformations are possible by using
vector valued trivariate NURBS.


Tor Olav

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