The photo below shows the roots of a little 
"bushy" tree I found.

I find this quite fascinating and I wish
that I could come up with a noisy pattern
for an iso that would produce such images.

Hope this is not too off-topic.


-- 
Best regards,

Tor Olav

mailto:tor### [at] hotmailcom
http://hjem.sol.no/t-o-k/tokpicts.html
http://www.crosswinds.net/~tok

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nice photo, Tor ...
  I have been to your web pages and I enjoy your photography.
I can see that why you are drawn to them and to POVray . . .
beautiful patterns and then the understanding them through trying
to simulate Ma Nature's scenes.
At least . . . that's what draws me in.

  I'm wondering if one calculated the positions of the objects
using a "flocking" algorithm as used in some ALife progs . . .
and placed spheres or blobs (or Antiblobs !!!) along each trail,
if the traces of their intertwining routes would look come anywhere
close to your pattern.

just a thought . . .
passed on to someone with more math skills than I ;)

Y

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> Hope this is not too off-topic.

Probably, but I like your photos and I'm always happy
to see them so it doesn't bother me at all.

It's very colorful for a bunch of roots. And it's sort of surreal.
I like.


-- 
Phil
...coffee?...yes please! extra sugar,extra cream...Thank you.

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Tor Olav Kristensen wrote:
> 
> The photo below shows the roots of a little
> "bushy" tree I found.
> 
> I find this quite fascinating and I wish
> that I could come up with a noisy pattern
> for an iso that would produce such images.
> 

That looks really nice, but it would be quite hard to do such a thing with
a Povray isosurface.  Maybe it would be better to use some kind of growing
algorithm (l-system) with collision detection.

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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Thank you.

I haven't done any work with flocking algorithms or
L-systems, but both sounds exciting.

yooper: Interesting idea to leave blobs components
along a flock trail. I'll give this a thought (or two).

Christoph: Do you have any suggestions for good web
sites about L-systems ?

Phil: Here's a link to a web page that shows some of
my more recent pictures (and some of my older ones too):

http://foto.no/cgi-bin/bildekritikk/vis_oversikt.cgi?brukerid=5769
(That web page is located within in a norwegian 
photography forum: http://foto.no )


-- 
Best regards,

Tor Olav

mailto:tor### [at] hotmailcom
http://hjem.sol.no/t-o-k/tokpicts.html
http://www.crosswinds.net/~tok

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Cool photo!  Yeah, that would take some pretty intense POVing.

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

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> Phil: Here's a link to a web page that shows some of
> my more recent pictures (and some of my older ones too):


beautiful.

 
-- 
Phil
...coffee?...yes please! extra sugar,extra cream...Thank you.

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Tor Olav Kristensen wrote:
> 
> Christoph: Do you have any suggestions for good web
> sites about L-systems ?
> 

There are quite some useful links on the LParser homepage:
http://www.xs4all.nl/~ljlapre/lparser.htm

Another package i recently mentioned, but that is quite difficult to use
is GROGRA:
http://www.uni-forst.gwdg.de/~wkurth/grogra.html

A simple online lsystem program (in german) is availabe at:
http://www.uni-koblenz.de/~grulich/lsystem.html

A general introduction is at:
http://www.csu.edu.au/complex_systems/tutorial2.html

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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yooper: Interesting idea to leave blobs components
along a flock trail. I'll give this a thought (or two).
----------

I was thinking about how roots often grow around one another . . .
and then I flashed on how the flocking algorithum employs a
collision detection function ( just what Christoph suggested be used
with an l-system algorithm).  Of course, this brings to mind your
Antiblobs . . . they also *avoid* the other components space.

I was thinking about this all night at work . . . (these things alwayz
bug me until I find a resolution ;) and I wondered if you had yet
expanded your Antiblob macro to include AntiCylinders ?  I have
no experience with them and I may be wrong but . . . doesn't POVray
or MegaPOV allow cylinders to be affected by the blob thing?
If so, then it might be possible to use tapered, curved Antiblob
cylinders to simulate growth that would have that avoid feature.

Y
got tonz of ideas . . .
& no time to follow up on any of 'em.  sad, ain't it   ;(
but I'm happy to give them away . . . as long as someone can use them ;)

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Started thinking about placing blobs along a trail . . .
I did a blob made up of 60 spheres . . . shifting each by 0.5
along the X axis and allowing each to randomly shift a small
amount in the Y and Z axis.

The top blob is only that ... with Strength and Radius set to 1.0
and threshold at 0.2.

For the next 3 I just varied the Strength as a funtion of the count
so that it began at ~  0.4 and ended at  0.9 for the 2nd from the
top,  1.6 for the strength of the 3rd down and  2.2 for the last.
This gave it a bit of taper . . . next I had planned on having 3
or 4 intertwine but I got sidetracked . . . started playing with
textures and ended up with an icicle sort of thing.  ;)

Some lay a good ice texture on me and I'll keep playing at it.

Back to the roots tomorrow ;)

Y

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