Reproducibility of the ParaView examples

[CsatiZoltan]

Hi,

I have ParaView-5.13.3-MPI-Linux-Python3.10-x86_64 downloaded from your website. To match the Python version, I created a uv environment based on Python 3.10. pvpython is on my path, and I added the line import paraview.web.venv to the Python examples so that ParaView uses my environment. Then I executed

~/Downloads/trame/examples/07_paraview/Picking$ pvpython pv_selection.py --venv ~/trame/uv_env/
hwloc/linux: Ignoring PCI device with non-16bit domain.
Pass --enable-32bits-pci-domain to configure to support such devices
(warning: it would break the library ABI, don't enable unless really needed).
ParaView is using venv: /home/zc/trame/uv_env
VisRTX 0.1.6, using devices:
 0: NVIDIA GeForce RTX 3050 Laptop GPU (Total: 4.0 GB, Available: 2.9 GB)
And to prevent your browser from opening, add '--server' to your command line.

App running at:
 - Local:   http://localhost:8080/
 - Network: http://127.0.0.1:8080/

Note that for multi-users you need to use and configure a launcher.
 JS Error => error: TypeError: r.a.extend is not a function

This was for the pv_selection example, but most other examples fail too with various errors. I can precise the error messages for the various examples if you want, but first I want to make sure if I use trame as intended.

Another thing I noticed is that for all the examples, two windows open:

• the scene in my web browser
  When the example code works (e.g. 07_paraview/WaveletROI), I can navigate in the 3D view, so everything is fine.
• a small separate window (not in my browser)
  This window does not react to the mouse and can only be closed by teminating the pvpython process in the terminal. What does this window serve for, and how can I instruct trame not to open it (the browser visualization is enough for me)? Probably related to trame opens additional OpenGL window #39, but I cannot delete the line view = simple.Render(), since the variable view is used later on.

So the question is: under which ParaView and Python version did you test your examples?

Thank you

[jourdain]

I think you are running into a browser caching issue. You probably are trying trame examples with vue3 (the working ones) and the ParaView ones are vue2.

You have 2 solutions, either you need to clear your browser cache or use a different port (so the browser won't assume it is the same html and js).

Try running it like that:

pvpython --force-offscreen-rendering --venv ~/trame/uv_env/ pv_selection.py --port 0

By swapping the args order, you won't need to import paraview.web.venv in the script, but having it won't hurt.
--force-offscreen-rendering will prevent the opening of that second window.

[CsatiZoltan]

Now it works perfectly, thank you!

You probably are trying trame examples with vue3 (the working ones) and the ParaView ones are vue2.

Yes, the examples are vue3. Do you think I need to understand web concepts as a Python programmer to be able to use trame?

[jourdain]

You don't need too much web concepts. But things like that may bite you once in a while. If you stick with vue3, this should not be an issue, especially if you are not developing your own web component (in JS). Worse case, you can double check that is not a caching issue using --port 0.