Bill DeWitt wrote:

> "Christoph Hormann" <Chr### [at] schunteretctu-bsde> wrote :
> >
> >         function {
> >                 (-V1*x-V2*y)&
> >                 (-V1*x+V2*y)&
> >                 (V1*x-V2*y)&
> >                 (V1*x+V2*y)&
> >                 (-V1*y-V2*z)&
> >                 (-V1*y+V2*z)&
> >                 (V1*y-V2*z)&
> >                 (V1*y+V2*z)&
> >                 (-V1*z-V2*x)&
> >                 (-V1*z+V2*x)&
> >                 (V1*z-V2*x)&
> >                 (V1*z+V2*x)
> >         }
>
>     I find this fascinating and have no hope of figuring it out. My
> love/hate relationship with Isosurface continues.

It's just an intersection of twelve planes in the form Ax+By+Cz. With a
dodecahedron I believe it is possible to orient it in such a way that
each plane only requires two of these components.

--
David Fontaine  <dav### [at] faricynet>  ICQ 55354965
My raytracing gallery:  http://davidf.faricy.net/

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