> What i would be tempted to do is use the software to create the plant, and then
> dissect it into its component pieces.
You are right - this is the main task, unfortunately I have no access to
sources of LS to make export properly and do grouping by plant parts,
so some manual work should be done, I'm only trying to minimize it.
--
YB

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Op 20/02/2023 om 18:32 schreef yesbird:
> As you can see here groups are not exactly reflects plant's structure.
> -- 
> YB

Indeed, and I am afraid that each different plant (I do not mean within 
the /Gaillardia_pulchella/ bunch) may show a different grouping 
arrangement which would need a different approach in the worst case. 
However, this petal grouping reduces work somewhat ;-]

-- 
Thomas

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Op 20/02/2023 om 18:21 schreef yesbird:
> Thanks, Thomas, you give me a good idea about reducing manual work, 
> analysis of groups and regrouping can help to do it.
> 
> May be I will write script to assign different materials to groups
> and then merge them. I need to know more about OBJ format for that.
> 
Are there other formats than OBJ you could export to? Sometimes that may 
help circumvent the problem.

> But autocolorizing still interesting to me. For example, what if I want 
> to highlight edges or peaks of the complex mesh with selected color ?
> Will try to dig into this problem ...
> 
That would be interesting to try but...

Each mesh is a single closed (?) unit and ideally you would need some 
way to recognise those 'peaks' of 'edges'. In a well-behaved model those 
would be already textured in the MTL corresponding file or - in more 
elaborate models - uv_mapped on the mesh. Again, can be done at some 
pain, but with the help of a modeller afaik. I have done that kind of 
work at great pain for some downloaded models I wanted absolutely to 
tweak in my favour, and it took me days and sometimes weeks to achieve 
properly. Inflammation of your arm and neck joints, and muscle pain may 
be your unlooked for reward too... :-/

-- 
Thomas

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Inflammation of your arm and neck joints, and muscle pain may
> be your unlooked for reward too... :-/
This is exactly what I want avoid, when talking about algorithmic 
methods... )))
--
YB

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> Indeed, and I am afraid that each different plant (I do not mean within 
> the /Gaillardia_pulchella/ bunch) may show a different grouping 
> arrangement which would need a different approach in the worst case. 
> However, this petal grouping reduces work somewhat ;-]
Last night I found optimal solution for growing plants:
https://github.com/wdiestel/arbaro
This is implementation of ideas in attached paper, works fine, but
written in Java (I hate it). It has a simpler plant structure
description, than L-systems.

Now I'm looking for this editor, but still can't find it:
http://povray.tashcorp.net/tutorials/qd_povtree/
--
YB

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Attachments:
Download 'p119-weber.pdf' (2163 KB)

On 21/02/2023 13:28, yesbird wrote:
>> Indeed, and I am afraid that each different plant (I do not mean within 
>> the /Gaillardia_pulchella/ bunch) may show a different grouping 
>> arrangement which would need a different approach in the worst case. 
>> However, this petal grouping reduces work somewhat ;-]
> Last night I found optimal solution for growing plants:
> https://github.com/wdiestel/arbaro
> This is implementation of ideas in attached paper, works fine, but
> written in Java (I hate it). It has a simpler plant structure
> description, than L-systems.
> 
> Now I'm looking for this editor, but still can't find it:
> http://povray.tashcorp.net/tutorials/qd_povtree/
> --
> YB
> 

There is also <http://ngplant.org/>

With some explanations and example here :
<http://louisbel.free.fr/macros/ngplant/ngplant.html>




-- 
Kurtz le pirate
Compagnie de la Banquise

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Op 21-2-2023 om 13:28 schreef yesbird:
>> Indeed, and I am afraid that each different plant (I do not mean 
>> within the /Gaillardia_pulchella/ bunch) may show a different grouping 
>> arrangement which would need a different approach in the worst case. 
>> However, this petal grouping reduces work somewhat ;-]
> Last night I found optimal solution for growing plants:
> https://github.com/wdiestel/arbaro
> This is implementation of ideas in attached paper, works fine, but
> written in Java (I hate it). It has a simpler plant structure
> description, than L-systems.
> 
I use Arbaro once in a while. Didn't Friedrich Lohmueller provide a 
small collection of trees he made with it?

> Now I'm looking for this editor, but still can't find it:
> http://povray.tashcorp.net/tutorials/qd_povtree/
> 
As said elsewhere, I shall look in my archive tomorrow.

-- 
Thomas

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Op 21-2-2023 om 13:17 schreef yesbird:
> Inflammation of your arm and neck joints, and muscle pain may
>> be your unlooked for reward too... :-/
> This is exactly what I want avoid, when talking about algorithmic 
> methods... )))
> 


Of course. :-)

-- 
Thomas

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On 21/02/2023 19:03, kurtz le pirate wrote:
> There is also <http://ngplant.org/>
> With some explanations and example here :
> <http://louisbel.free.fr/macros/ngplant/ngplant.html>
Thanks a lot, will play with it this night.
--
YB

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On 21/02/2023 19:07, Thomas de Groot wrote:
> I use Arbaro once in a while. Didn't Friedrich Lohmueller provide a 
> small collection of trees he made with it?
Yes, exactly, this is the way I came to it:
https://povlab.online/povtutorial/plants/plants_00e.html

The great advantage of Arbaro is the ability to include native and 
custom POV objects in constructions it produces. Now I am teaching it to 
grow flowers.

> As said elsewhere, I shall look in my archive tomorrow.
Ooo, thanks in advance.
--
YB

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