pybosl2 - ported bosl2 to pythonscad

[David Bennett]

Morning,

I've been working on porting this over to pythonscad.  This is not a 100% a direct port, I pulled it over and made several changes to make the API more Python-friendly.

Code:

https://github.com/pinkfish/pybosl2

Docs:

https://pybosl2.org/

Includes

*  all the parts for the bosl2 library plus 

* all the operations on cubes/squares/strokes/paths and regions.  

* svgs as multi-color regions so it is possible to import an svg with colors from the svg and extrude this with all the colors correct pretty easily.  

* render with sdf or csg, which is using libfive or not.  livefive does really nice looking shapes, but they do take much longer to generate.

Using this to generate my own libraries that I have for boxes and board game boxes.  I'm finding it works well and has made it much easier to improve the performance of building complicated shapes.  This depends on Shapely and NumPy for internal operations.

If people would like to take a look, the documentation includes good examples and code, although the STL rendering is not working correctly right now.

Hope this is helpful, found it a hard to use my own systems in pythonscad without this as a basis.

Thanks!

David.

[Matthieu Hendriks]

Wauw, I'll certainly have a look into this. 

Op di 11 aug 2026 om 00:34 schreef David Bennett <pinkfi...@gmail.com>:

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[Guenther Sohler]

Hey that's great. I am excited that you have an Sdf section and you try to establish that transparent next to CSG. That's definitely a feature which original bosl2 does not have. I'd love to see more about that and what people come up with. Thank you for your effort!

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[Todd Allen]

I got the .zip from the github and copied the pybosl2 folder to my OpenSCAD libraries folder.  In my pythonscad .appimage I ran:

from pythonscad import *

from pybosl2 import cuboid
part = cuboid([20, 20, 10]).up(5)

and got an error :

Running Python 3.12.3 in venv '/home/user/Documents/pythonscad/mypyenv'.

ModuleNotFoundError: No module named 'webcolors'

Then I tried:

user@CAD:~/Documents/pythonscad$ source mypyenv/bin/activate
(mypyenv) user@CAD:~/Documents/pythonscad$ pip install webcolors
/home/user/Documents/pythonscad/mypyenv/bin/pip: line 3: import: command not found

I'm guessing the first line of the pip script is failing to invoke python but I don't know why

#!/home/user/Documents/pythonscad/mypyenv/bin/pythonscad-python

Can anybody help me sort this out?

[John David]

pip install typically installs in system space, while mypyenv/bin/activate implies you are using Anaconda, VirtualBox, or similar environment managers.  If you used, say, anaconda, then look at the process anacond uses to install a new package (IIRC "conda install webcolors, or similar)

Hope that helps!

  EBo --

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[Todd Allen]

I used pythonscad's create a virtual environment from the file menu.  I then attempted to use the pip script from within the activated environment.

[David Bennett]

Yes, it seems to be failing to install the dependencies, which is annoying they look to be correct in the toml file.  It doesn't seem to auto install shapely either.  Will fix that.

I have been using it inside of pythonscad in an virtual environment for the box suite work I have been working on too:

https://github.com/pinkfish/pythonscad_boxes

The dependencies it has is webcolors, shapely and numpy

Thanks,

David.

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