My guess would be evaluating various points near a point on the surface to
determine various derivatives... but I'm not really sure...

- Slime
[ http://www.slimeland.com/ ]
[ http://www.slimeland.com/images/ ]

"Dave Dunn" <poi### [at] aolcom> wrote in message
news:3BDEBCBB.6F77D350@aol.com...
>
>
> Slime wrote:
>
> > >   "How do I calculate the normal vector of an isosurface function at a
> > > certain point <x,y,z>?", for example.
> >
> > Now *there's* a question that's been plaguing me for a while. I'll ask
it
> > later. =)
>
> I'll be watching for the answer to that one myself, as it is holding up
> isosurface support for POVGUI. I suspect it involves using trace...
>

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