Some of the sample programs display a blank screen

[Richard Fuhr]

Some of the sample programs in NURBS-Python display a blank screen (but no error message).

For example (see attached files)

python3 visualization-1.py yields a display of the curve and its control polygon

python3 visualization-2.py yields a blank screen.

I am very new to NURBS-Python and have just started trying it out today.

I have access to the source code via

~/.local/lib/python3.12/site-packages/geomdl

so if I need to make any changes there that would enable some of the visualization to work, please let me know.

[Richard Fuhr]

In my copy of the source code for geomdl I replaced np.float with float where appropriate in the visualization module, so that the code would run.

[Richard Fuhr]

I should point out that replacing np.float with float enabled the code to run without error messages, but I get a blank screen when invoking

python3 visualization-2.py 

Does anyone know why this is, and what code would need to be changed?

[Onur Bingol]

The code in this branch should fix the issues: https://github.com/orbingol/NURBS-Python/tree/feature/vis-fix

How to use the code in the "feature/vis-fix" branch (please remove the quotes before copy-paste)

1. Uninstall the existing geomdl package: "pip3 uninstall geomdl" or "pip uninstall geomdl"

2. git-clone the repository: "git clone https://github.com/orbingol/NURBS-Python.git"

3. Switch to "feature/vis-fix" branch: "git checkout feature/vis-fix"

4. Install geomdl using this command: "pip3 install -e ." or "pip install -e ."

I will need to work on some other minor updates before the release, I'd appreciate if you could use the above method to install geomdl temporarily.

-Onur

---- On Mon, 19 Feb 2024 13:23:58 -0800 Richard Fuhr <richar...@gmail.com> wrote ---

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[Richard Fuhr]

Thank you.  The four steps given by Onur Bingol above (to use the feature/vis-fix branch), worked quite nicely, and enabled me to run the test code successfully!

[JBo]

Hi all

NURBS-Python newbie here ...

I am getting started with bezier examples

I get blank figures with both :

• ex_bezier_curve3d.py
• ex_bezier_surface.py

despite using the above method.

( win11x64 , pycharm, Python 3.12)

Can you please help me through this first step ?

Regards

Julien

[Onur R. Bingol]

Hello Julien,

Please use a different python and/or matplotlib version to see if you can replicate the issue.

Best,

Onur

Onur R. Bingol, PhD

con...@onurbingol.net | https://onurbingol.net 

---- On Sun, 07 Jul 2024 06:08:49 -0700 jbocr...@gmail.com wrote ----

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[JBo]

Now it works : https://colab.research.google.com/drive/1_d6q9YdZaGVaHhCu2ae-VaVQ2gZJf2QX

At least on colab

I can't tell why