Unfortunately for many, who are not math inclined, even to this extent,
the first is easier.

Chris Huff wrote:

> In article <3A0A0986.10DA189E@mail.com>, Ben Birdsey
> <cla### [at] mailcom> wrote:
>
> >       Try using a quartic is oriented along the z-axis.
>
> I prefer isosurfaces myself, though they currently require a patched
> version of POV. I mean, which is easier? This:
>
> quartic{
>    <    0, 0,    0, 0,  0, 0, 0,
>      xxzz, 0,    0, 0,  0, 0, 0,
>         0, 0,    0, 0,  0, 0, 0,
>         0, 0, yyzz, 0,  0, 0, 0,
>         0, 0,    0, 0, zz, 0, const >
> ...
>
> or this:(Not exactly the same as your function, but it should give you
> the general idea)
> isosurface {
>     function {z - 1/sqrt(sqr(x) + sqr(y) + 0.01)}
>     threshold 0
> ...
>
> --
> Christopher James Huff
> Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
> TAG: chr### [at] tagpovrayorg, http://tag.povray.org/
>
> <><

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