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Hi all
A few years ago, I started creating both a 2D and a 3D Lindenmayer system.
I have now resumed work on the 3D version of the system and am trying to
find a good way to generate triangles and polygons.
Here is an image showing some of the progress so far. It shows my take on
the plant in figure 1.26 in the book "The algorithmic beauty of plants".
I will update the 3D library on GitHub once I have settled on a sensible
solution.
--
Tor Olav
http://subcube.com
https://github.com/t-o-k
Post a reply to this message
Attachments:
Download 'plant_01.png' (346 KB)
Preview of image 'plant_01.png'
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On 15/10/2026 01:03, Tor Olav Kristensen wrote:
> Hi all
>
> A few years ago, I started creating both a 2D and a 3D Lindenmayer system.
>
> I have now resumed work on the 3D version of the system and am trying to
> find a good way to generate triangles and polygons.
>
> Here is an image showing some of the progress so far. It shows my take on
> the plant in figure 1.26 in the book "The algorithmic beauty of plants".
>
> I will update the 3D library on GitHub once I have settled on a sensible
> solution.
>
> --
> Tor Olav
> http://subcube.com
> https://github.com/t-o-k
>
Excellent work and nice book !
I am working on the same project, but in browser environment:
https://yesbird.online/rebelle/assistant/ls_painter.html
Good luck with triangles :)
--
YB
Post a reply to this message
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yesbird wrote:
> On 15/10/2026 01:03, Tor Olav Kristensen wrote:
> > Hi all
> >
> > A few years ago, I started creating both a 2D and a 3D Lindenmayer system.
> >
> > I have now resumed work on the 3D version of the system and am trying to
> > find a good way to generate triangles and polygons.
> >
> > Here is an image showing some of the progress so far. It shows my take on
> > the plant in figure 1.26 in the book "The algorithmic beauty of plants".
> >
> > I will update the 3D library on GitHub once I have settled on a sensible
> > solution.
> >
> > --
> > Tor Olav
> > http://subcube.com
> > https://github.com/t-o-k
> >
>
> Excellent work and nice book !
Thank you!
> I am working on the same project, but in browser environment:
> https://yesbird.online/rebelle/assistant/ls_painter.html
Your web pages look very nice and have a modern feel.
It seems that your L-system project is based on Javascript. Does it need
access to any other resources (than the browser) on the computer?
> Good luck with triangles :)
Ditto ;-)
--
Tor Olav
http://subcube.com
https://github.com/t-o-k
Post a reply to this message
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On 15/10/2026 20:06, Tor Olav Kristensen wrote:
> Your web pages look very nice and have a modern feel.
Thanks for kind words :).
>
> It seems that your L-system project is based on Javascript. Does it need
> access to any other resources (than the browser) on the computer?
Yes, this web application written on Javascript and sits in browser
completely without accessing other resources, implementing
cross-platform capability.
This is a main advantage of web applications.
--
YB
Post a reply to this message
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"Tor Olav Kristensen" <tor### [at] TOBEREMOVEDgmail com> wrote:
> Hi all
>
> A few years ago, I started creating both a 2D and a 3D Lindenmayer system.
>
> I have now resumed work on the 3D version of the system and am trying to
> find a good way to generate triangles and polygons.
>
> Here is an image showing some of the progress so far. It shows my take on
> the plant in figure 1.26 in the book "The algorithmic beauty of plants".
>
> I will update the 3D library on GitHub once I have settled on a sensible
> solution.
>
> --
> Tor Olav
> http://subcube.com
> https://github.com/t-o-k
Hi Tor Olav,
do not be so humble to say that you started creating a 2D version of the
LSystem.
As far as I can say it's perfect! Tested it 'gazillions' of times.
And so is your 3D version - but by far more complex! Reading your code makes my
brain spin. Tested it a lot of times and I love it because it's a brain twister.
Go on as I can't wait to see how triangles and polygons will work.
Cheers
Droj
Post a reply to this message
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yesbird wrote:
> On 15/10/2026 01:03, Tor Olav Kristensen wrote:
> > Hi all
> >
> > A few years ago, I started creating both a 2D and a 3D Lindenmayer system.
> >
> > I have now resumed work on the 3D version of the system and am trying to
> > find a good way to generate triangles and polygons.
> >
> > Here is an image showing some of the progress so far. It shows my take on
> > the plant in figure 1.26 in the book "The algorithmic beauty of plants".
> >
> > I will update the 3D library on GitHub once I have settled on a sensible
> > solution.
> >
> > --
> > Tor Olav
> > http://subcube.com
> > https://github.com/t-o-k
> >
>
> Excellent work and nice book !
> I am working on the same project, but in browser environment:
> https://yesbird.online/rebelle/assistant/ls_painter.html
>
> Good luck with triangles :)
> --
> YB
Hi YB,
interesting to see that you are working on a subject we in a way share.
I opened your site today - it's great - and I have only 'one' question:
- which browser was it designed for?
- use for mobile phones?
When I open an image it covers a part of the left side navigation.
Otherwise good job!
Can I copy some of your LS code for further development?
Cheers
Droj
Post a reply to this message
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On 16/10/2026 03:01, Droj wrote:
>
> interesting to see that you are working on a subject we in a way share.
>
Glad to meet a colleague !
> I opened your site today - it's great - and I have only 'one' question:
> - which browser was it designed for?
>...
> When I open an image it covers a part of the left side navigation.
I did not thought about some specific browser expected the same
behavior on all platforms. Could you please send a screenshot a
and info about yours ?
> - use for mobile phones?
Unfortunately no, because this project is add-on to "Rebelle" painting
software that has no mobile version. Feel free to port it to any
platform of your choice.
> Can I copy some of your LS code for further development?
Sure, here is a public repository under MIT license for you :)
https://github.com/syanenko/rebassist
It will be interesting to look at your project in future.
> Otherwise good job!
Thanks for kind words.
--
YB
Post a reply to this message
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On 10/14/2026 3:03 PM, Tor Olav Kristensen wrote:
> Hi all
>
> A few years ago, I started creating both a 2D and a 3D Lindenmayer system.
>
> I have now resumed work on the 3D version of the system and am trying to
> find a good way to generate triangles and polygons.
>
I have the same conceptual problem in my solution to these.
I keep trying to model a proper mesh2 object for a complete surface and
I should probably just be happy enough to create four triangles to mimic
the conical or cylindrical shape of each segment and call it a day.
I also was doing my generation scripts in Python, but I'm trying to
figure out how to do them purely in SDL.
Uncle Josh
Post a reply to this message
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yesbird wrote:
> On 16/10/2026 03:01, Droj wrote:
> >
Hi yesbird,
> > When I open an image it covers a part of the left side navigation.
>
> I did not thought about some specific browser expected the same
> behavior on all platforms. Could you please send a screenshot a
> and info about yours ?
>
I attached a screenshot to show what I meant.
The window with the LS data is not scalable and consumes half of the screen.
I am using Firefox v 158.0 on Windows 10.
>
> > Can I copy some of your LS code for further development?
>
> Sure, here is a public repository under MIT license for you :)
> https://github.com/syanenko/rebassist
Thanks for the link and the permission.
Droj
Post a reply to this message
Attachments:
Download 'l_system painter.png' (261 KB)
Preview of image 'l_system painter.png'
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Josh English <Jos### [at] joshuarenglishcom> wrote:
> On 10/14/2026 3:03 PM, Tor Olav Kristensen wrote:
> > Hi all
> >
> > A few years ago, I started creating both a 2D and a 3D Lindenmayer system.
> >
> > I have now resumed work on the 3D version of the system and am trying to
> > find a good way to generate triangles and polygons.
> >
>
> I have the same conceptual problem in my solution to these.
>
> I keep trying to model a proper mesh2 object for a complete surface and
> I should probably just be happy enough to create four triangles to mimic
> the conical or cylindrical shape of each segment and call it a day.
>
> I also was doing my generation scripts in Python, but I'm trying to
> figure out how to do them purely in SDL.
Hi Josh
Yes, gathering the triangles into a mesh2 is cumbersome, especially if one wants
to allow for stacked polygons.
Do you want gather all the triangles from a full expansion of a L-system into a
single mesh2 ?
--
Tor Olav
http://subcube.com
https://github.com/t-o-k
Post a reply to this message
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