Enable parallel_projection as a kwarg

[PProfizi]

Closes #1532

[ZanePC]

Thank you, it's working!

[ZanePC]

Sorry, it's me again. A new problem has arisen. In the same camera perspective (cpos), the field of view in parallel views is much smaller than that in perspective views, so the zoom option in pyvista. plot() is needed to adjust the field of view. Although that can be manually adjusted in interactive mode (interactive=True), it is impossible to adjust each image when saving screenshots in batch mode. I tried to modify the source code of dpf, but failed.

[PProfizi]

Sorry, it's me again. A new problem has arisen. In the same camera perspective (cpos), the field of view in parallel views is much smaller than that in perspective views, so the zoom option in pyvista. plot() is needed to adjust the field of view. Although that can be manually adjusted in interactive mode (interactive=True), it is impossible to adjust each image when saving screenshots in batch mode. I tried to modify the source code of dpf, but failed.

Hello @ZanePC, are you referring to this functionality? https://docs.pyvista.org/version/stable/api/plotting/_autosummary/pyvista.plotter.zoom_camera

[ZanePC]

Thanks to your prompt, I succeeded! I have added code in the following two places in dpf/core/plotter.py, hoping to add it to future versions (if this is the most elegant way to implement it).

Code 1

Code 2

[PProfizi]

@ZanePC thanks for that, I'll make a PR proposing these changes if that's OK with you. I'll also update the plotting examples and the docstrings.

[ZanePC]

Sure, I'm glad I could offer you this little bit of help. Thank you very much for your excellent work!

[ZanePC]

Hi PProfizi, I'm here to provide feedback again. I'm sorry I didn't finish all the related issues at once. The new issue is that when using the DpfPlotter class for plotting, "parallel_projection=True" will fail. So I moved the code you wrote to the vicinity of the "zoom" code mentioned last time, and the modified code is as follows:

Code 1

Code 2

Code 3

It should be noted that the code snippet for "parallel_projection" must come before "zoom", otherwise "zoom" will not work

After my testing, "parallel_projection" and "zoom" can all work in the following three plotting methods:

1. Class Model, function metadata.meshed_region.plot();
2. Class DpfPlotter, function show_figure();
3. Class Plotter, function plot_contour().

[ZanePC]

@ZanePC thanks for that, I'll make a PR proposing these changes if that's OK with you. I'll also update the plotting examples and the docstrings.

Hello PProfizi (@PProfizi),

In the new version of dpf, although parallel view can now be activated, "zoom" functionality is still not available. The code modifications I mentioned earlier can resolve this issue (link attached). I hope these changes can be incorporated into the next version. Thank you very much!

Best regards