"Bald Eagle" <cre### [at] netscapenet> writes:

> Because it's a giant mess.  You can do it, and it will be a bit slow,
> but here's a link for you:
>
> http://news.povray.org/web.5ebedadaa032ea3dfb0b41570%40news.povray.org

Thanks, but my goal was to get an arbitrary POV-Ray object—like a text
object consisting of a single theta—into an isosurface, so it could then
be transformed non-linearly at will.  Of course, that’d require a
generic way to make up a smooth transition, with a finite gradient, from
the outside to the inside, to replace the ‘object’ pattern’s jump from 0
to 1 at the boundary.

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Subclick <no### [at] spam> wrote:




> generic way to make up a smooth transition, with a finite gradient, from

> to 1 at the boundary.

Yes, sorry - I think I botched that reply.

Bill Pokorny helped me along doing the same thing a while back, and here's one
of the files related to that.   Feel free to ask any questions if the code
(mostly his) is unclear.

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Attachments:
Download 'objectnormalfunction.pov.txt' (6 KB)

"Bald Eagle" <cre### [at] netscapenet> writes:

> Bill Pokorny helped me along doing the same thing
> a while back, and here's one
> of the files related to that.  Feel free to ask
> any questions if the code
> (mostly his) is unclear.

Thank you very much.  I guess I have a lot to learn before I face this
problem again.

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Subclick <no### [at] spam> wrote:


> problem again.

No worries.  I tend to find myself in the deep end of the pool a lot.  :D

The trick there is that since it's a discontinuous function with an infinite
gradient, one just inserts a user-made smooth gradient to join up the 2 regions
of the function.  And then the isosurface method that you want to use works just
fine.

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