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From: Tor Olav Kristensen
Subject: Re: Off-topic picture of roots (79KB)
Date: 14 May 2001 20:45:26
Message: <3B007C2A.D0199EFE@online.no>
yooper wrote:
> 
> 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 ;)

Thank you for sharing more of these ideas of 
yours yooper ! 

I have not yet made any "cylinder antiblobs",
but maybe it will produce exiting results.
(The math wouldn't bee too difficult I think
...)

And yes: IIRC one can use cylinder 
components within blobs.

But unfortunately at the moment I don't have
much time for POV-experimenting either.
=(

BTW: Are you working during the night ??


-- 
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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From: Tor Olav Kristensen
Subject: Re: Off-topic picture of roots (79KB)
Date: 14 May 2001 21:02:31
Message: <3B00802B.EDBCD269@online.no>
David Fontaine wrote:
> 
> Cool photo! 

Thanks David.

> Yeah, that would take some pretty intense POVing.

And if one could work out the POV code,
I suspect it would take several eternities
to render...


-- 
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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From: Tor Olav Kristensen
Subject: Re: Off-topic picture of roots (79KB)
Date: 14 May 2001 21:04:57
Message: <3B0080BE.6B47DB15@online.no>
Christoph Hormann wrote:
> 
> 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

Thank you very much for your links Christoph.
I've started reading now.


-- 
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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From: Ken
Subject: Re: Off-topic picture of roots (79KB)
Date: 14 May 2001 22:43:59
Message: <3B009886.2947EB33@pacbell.net>
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.

You could fake it fairly easy with a HF object but creating the base
image may be a challenge :)

-- 
Ken Tyler - 1400+ POV-Ray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/


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From: Batronyx
Subject: Re: Off-topic picture of roots (79KB)
Date: 15 May 2001 02:18:52
Message: <3b00ca4c$1@news.povray.org>
Ken wrote in message <3B009886.2947EB33@pacbell.net>...
>
>
>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.
>
>You could fake it fairly easy with a HF object but creating the base
>image may be a challenge :)
>
>--
>Ken Tyler - 1400+ POV-Ray, Graphics, 3D Rendering, and Raytracing Links:
>http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/


Indeed. Heightfields work great! See my post below. Creating the image isn't
actually all that difficult, but it is still takes some work.

----------------------------------------
Batronyx ^"^
bat### [at] cadronhsacom
http://www.batronyx.com
Bhuddist monk to hotdog vendor:
     "Make me one with everything."
----------------------------------------


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From: Nekar Xenos
Subject: Re: Off-topic picture of roots (79KB)
Date: 17 May 2001 03:10:28
Message: <3b037964@news.povray.org>
I think you should take a look at Kevin Wamplers sig...

#version unofficial MegaPov 0.6;camera{location-z*8direction z*2look_at 0}
light_source{<-2,5,-2>*1e3 rgb 1}%K=text{ttf"cyrvetic.ttf""KEVIN".25,0
translate-1.5*x scale 1.5}%G=pigment{rgb<.8,.6,.4>}%R=seed(0);#macro B()<rand(
R)-.5,rand(R)-.5,rand(R)-.5>#end#macro A(C)%T=0;%V=<0,1,0>;#while(T<250)%S=0;%
P=B();%U=trace(K,C,P)-C;#while(S<15)%P1=B();%W=trace(K,C,P1)-C;#if(vlength(W)
<vlength(U))%P=P1;%U=trace(K,C,P)-C;#end%S=S+1;#end%V=V+P;%V=V/vlength(V);%D=(
250-T)/1e4;union{cylinder{C,C+V*.03,D}sphere{C,D}triangle{C,C+B()*D*10,C+B()*D
*4 pigment{rgb<0,.7,0>}}pigment{G}no_shadow}%C=C+V*.03;%T=T+1;#end#end%N=0;
#while(N<35)A(<(rand(R)-.5)*3, 0, rand(R)/4>*1.7)%N=N+1;#end  // Kevin Wampler


Nekar
--
#local N=<-20,40,100>;#local K=<20,-40,100>;#local R=seed(0);blob{#while((K-N).
x>0)#local X=N;#local N=N+<rand(R),rand(R),1>/3;#local N=(vlength(N-K)<vlength(
X-K)?N:2*X-N);sphere{<N.y,-N.x,N.z>,1,1 scale .02}sphere{N,1,1 scale.02}sphere{
<-N.x-40,N.y,N.z>1,1 scale.01}sphere{<N.x+40,-N.y,N.z>1,1 scale.01 }#end
pigment{rgbt 1}interior{media{emission <2,4,5>*5}}hollow}// Nekar Xenos
"Tor Olav Kristensen" <tor### [at] hotmailcom> wrote in message
news:3AF08D55.6B22895D@hotmail.com...
>
> 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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From: Anton Sherwood
Subject: Re: Off-topic picture of roots (79KB)
Date: 25 Nov 2001 21:12:04
Message: <3C01A6B5.1E813192@pobox.com>
yooper wrote:
>   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.

Unfortunately there's nothing to keep the trails from intersecting.


-- 
Anton Sherwood  --  http://www.ogre.nu/ (online again, Nov.19)


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