Here is my first attempt at a cactus in MegaPOV(inspired by some 
discussions in the thread "A clock"), it uses trace() and an isosurface. 
The texturing still needs a lot of work...

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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Chris Huff wrote:
> 
> Here is my first attempt at a cactus in MegaPOV(inspired by some
> discussions in the thread "A clock"), it uses trace() and an isosurface.
> The texturing still needs a lot of work...
> 

It's real good. A bit on the bright side but otherwise cute.
The translated nickname for this kind of cactus is

mother-in-law chair

:-)

Marc

-- 
Marc Schimmler

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I love it! When you say you used trace, I guess that the whole cactus is
made with (pseudo)maths, and no hand-positioning of primitives, right?

That's the way  (aha-aha) I like it (aha-aha)...

sk.

Chris Huff skrev i meldingen ...
>Here is my first attempt at a cactus in MegaPOV(inspired by some
>discussions in the thread "A clock"), it uses trace() and an isosurface.
>The texturing still needs a lot of work...
>
>--
>Chris Huff
>e-mail: chr### [at] yahoocom
>Web page: http://chrishuff.dhs.org/
>
>

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In article <38b524d7@news.povray.org>, "Simen Kvaal" 
<sim### [at] studentmatnatuiono> wrote:

> I love it! When you say you used trace, I guess that the whole cactus is
> made with (pseudo)maths, and no hand-positioning of primitives, right?

I used trace() to place the spines, the body of the cactus is a single 
isosurface. The spines were placed by #while() loops, and nothing was 
hand positioned(well, the starting position of the "spine scanner" and 
the height of the isosurface were...).

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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"Chris Huff" <chr### [at] yahoocom> wrote in message
news:chrishuff_99-9D37D5.05283324022000@news.povray.org...
> Here is my first attempt at a cactus in MegaPOV(inspired by some
> discussions in the thread "A clock"), it uses trace() and an isosurface.
> The texturing still needs a lot of work...
>

    Looks great how it is but you are right, just a little bit of texturing
would go a long way on this. I am just baffled at how this is one
IsoSurface! I suspect that there is some sort of a sin()/cos() thing going
on, but dang if I can figger it.

    There is a -lot- more to IsoSurface than I will ever be able to learn.

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Wow, excellent cactus. I dont know how you could improve on it, looks just
great.

Chris Huff wrote:

> Here is my first attempt at a cactus in MegaPOV(inspired by some
> discussions in the thread "A clock"), it uses trace() and an isosurface.
> The texturing still needs a lot of work...
>
> --
> Chris Huff
> e-mail: chr### [at] yahoocom
> Web page: http://chrishuff.dhs.org/
>
>  [Image]

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Outstanding!!  Most realistic looking real-life thing.  I think the thorns
or pricks or whatever you want to call them is what makes it realistic - the
randomness, as well as the soft shadows.  Well done!!

Mike

"Chris Huff" <chr### [at] yahoocom> wrote in message
news:chrishuff_99-9D37D5.05283324022000@news.povray.org...
> Here is my first attempt at a cactus in MegaPOV(inspired by some
> discussions in the thread "A clock"), it uses trace() and an isosurface.
> The texturing still needs a lot of work...
>
> --
> Chris Huff
> e-mail: chr### [at] yahoocom
> Web page: http://chrishuff.dhs.org/
>
>

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Chris Huff wrote:
>Here is my first attempt at a cactus in MegaPOV(inspired by some
>discussions in the thread "A clock"), it uses trace() and an isosurface.

That looks great. If I can't come up with a good cactus could you share the
code ? :)

>The texturing still needs a lot of work...
>

Maybe just a slight granite normal scaled bigger in y than in x and z ?
I'll go fech some books since I haven't taken a better look at the "texture"
of real cactii :)

Jide

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This is a great image: what a piercingly fine cactus! How are you ever going
to do better?

--
Regards,
Sander


Chris Huff <chr### [at] yahoocom> schreef in berichtnieuws
chrishuff_99-9D37D5.05283324022000@news.povray.org...
> Here is my first attempt at a cactus in MegaPOV(inspired by some
> discussions in the thread "A clock"), it uses trace() and an isosurface.
> The texturing still needs a lot of work...
>
> --
> Chris Huff
> e-mail: chr### [at] yahoocom
> Web page: http://chrishuff.dhs.org/
>
>

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I'm impressed!

I had thought that trace wouldn't work with the isosurface, I was obviously
wrong!

Which is a good thing as I've been experimenting with ridged multifractels
as a means of creating landscapes - now I can place things on them!

Mick

--
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"Chris Huff" <chr### [at] yahoocom> wrote in message
news:chrishuff_99-9D37D5.05283324022000@news.povray.org...
> Here is my first attempt at a cactus in MegaPOV(inspired by some
> discussions in the thread "A clock"), it uses trace() and an isosurface.
> The texturing still needs a lot of work...
>
> --
> Chris Huff
> e-mail: chr### [at] yahoocom
> Web page: http://chrishuff.dhs.org/
>
>

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