> This site offers a bunch of papers and a very nice book ("Algorithmic
> beauty of plants") on the general topic of modelling plants:
>
> http://algorithmicbotany.org/papers/

Hm, L-Systems once again. There's a lot about L-Systems on the web, but its
hard to control and get desired results, so I'd rather take a rule-based
method.

> There's also a scene shipped with POV, I think in the trace demos, which
> grows ivy.

But I didn't know about the scene in POV, it's called "tracevines.pov" in
scenes/language, and I think I should have a look at that. Though the first
render looks a little, well, unsatisfying, I might get some good ideas from
it. :-)

Regards,
Tim

-- 
aka "Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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Tim Nikias wrote:
> For my next short movie, I'm thinking about creating a balcony, on which
> plants have been growing unattended for quite some time. What I'd like to do
> for this, is to script a simulation tool which might allow me to simply
> place a few plants of ivy, and let the script do the rest.
>
> 
	There was an image by Gary MacKinnon with a nice ivy plant growing on a 
house : http://www.povcomp.com/entries/83.php
Explanation is quite short, and maybe it is not what you want to get, 
but maybe it can give you some idea ?!

Thibaut

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>>This site offers a bunch of papers and a very nice book ("Algorithmic
>>beauty of plants") on the general topic of modelling plants:
>>
>>http://algorithmicbotany.org/papers/
> 
> 
> Hm, L-Systems once again. There's a lot about L-Systems on the web, but its
> hard to control and get desired results, so I'd rather take a rule-based
> method.

LOL! And L-systems aren't "rule-based"? ;-)

I've been thinking about something like this myself, so I might ahve to 
take myself over there and have a read too. :-)

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> LOL! And L-systems aren't "rule-based"? ;-)

Hey, you little geek! :-) Of course L-Systems are rule-based, but on such a
level that its really hard to visualize and predict properly without
actually applying the L-System itself. With "rule-based" a meant something
more simple like "if longer than this, divide into two;  spread some leaves;
done". But I guess you knew what I meant. :-P

-- 
aka "Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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Tim Nikias wrote:
> For my next short movie, I'm thinking about creating a balcony, on which
> plants have been growing unattended for quite some time. What I'd like to do
> for this, is to script a simulation tool which might allow me to simply
> place a few plants of ivy, and let the script do the rest.
> 
> So, in effect, what I need are means to find places where it can grow,
> accumulate data to know where it should still be growing to, and some means
> to keep it from spreading too far.

There is a paper here, called "Virtual Climbing Plants Competing for 
Space" that might interest you :
http://paginas.ccm.itesm.mx/~beda/

Now, I don't know whether the technique will be easy to translate in 
POV... At least, the figures look good ;-)

HTH

-- 
Vincent

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> There was an image by Gary MacKinnon with a nice ivy plant growing on a
> house : http://www.povcomp.com/entries/83.php
> Explanation is quite short, and maybe it is not what you want to get,
> but maybe it can give you some idea ?!

The idea is rather straightforward for a wall: simply try and climb it, it
it encounters a window or door, don't go there. What I need is something to
cling to struts and fences, grow along horizontal bars etc. Wrapping around
objects is needed. But thanks nontheless.

Regards,
Tim

-- 
aka "Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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> There is a paper here, called "Virtual Climbing Plants Competing for
> Space" that might interest you :
> http://paginas.ccm.itesm.mx/~beda/
>
> Now, I don't know whether the technique will be easy to translate in
> POV... At least, the figures look good ;-)

Yup, the figures look good. I'll have a closer look at it tomorrow, perhaps
there are some approaches and ideas in there which I can make use of. On a
quick glance I've read something about data-structures and such, depending
on the implementation, that could get a little complicated for POV-Ray (as
it doesn't allow dynamic references and links as such). (TO THE GEEKS: I
know, there are ways around that, but lets not get too fussy. ;-)

But at least something to read with some technical background, much more
helpful than just a description like "based upon various rules, the plant
grows". Duh! :-P

Thank you very much!

Regards,
Tim

-- 
aka "Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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> Thank you very much!

And I want to add another thank you! I've read it at the university today
and it provided some very useful insights into vine/ivy-simulation using
particle systems, and I think it could even be used for a variety of other
plants as well, once some new factors are introduced into various equations.
It covers leaf-placement and generation along the process as well, which I
thought I'd have to generate in a later step based on the vines (at least
with the approach I had in mind). So, even though I'll probably end up with
a technique of my own, this paper sure had some useful hints to add. :-)

Regards,
Tim

-- 
aka "Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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Tim Nikias wrote:
>>Thank you very much!
> 
> 
> And I want to add another thank you! I've read it at the university today
> and it provided some very useful insights into vine/ivy-simulation using
> particle systems, and I think it could even be used for a variety of other
> plants as well, once some new factors are introduced into various equations.
> It covers leaf-placement and generation along the process as well, which I
> thought I'd have to generate in a later step based on the vines (at least
> with the approach I had in mind). So, even though I'll probably end up with
> a technique of my own, this paper sure had some useful hints to add. :-)
> 
> Regards,
> Tim
> 

Hey, glad it helps :-)

-- 
Vincent

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"Tim Nikias" <JUSTTHELOWERCASE:timISNOTnikias(at)gmx.netWARE> schreef in
bericht news:436f6b20@news.povray.org...
So, even though I'll probably end up with
> a technique of my own, this paper sure had some useful hints to add. :-)
>

Looking forward to what you are going to produce!!! Seems very promising.

Thomas

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