automate screenshot in script

[HumHongeKamyaab]

I want to save the figure as a PNG file in particular camera orientation. While we can set camera using plot.camera, I couldn't find something like plot.save, so that a png image can be saved using a python script, and we don't have to manually select screenshot from the widget to save the image,

[artur-trzesiok]

Hi @HumHongeKamyaab

For screenshots from jupyter notebook mode you can use plot.fetch_screenshot() like here

https://github.com/K3D-tools/K3D-jupyter/blob/main/examples/screenshot_generator.ipynb

For execution without jupyter we have headless rendering: https://github.com/K3D-tools/K3D-jupyter/blob/main/examples/headless.ipynb

Best regards, Artur

[youssefassis]

Hi @artur-trzesiok

Thanks for providing this veryuseful visualization library.

I have a problem when I try to take a single screenshot using the exact same code provided in the documentation here. After running this line of code:plt.fetch_screenshot() , the output of plt.screenshot is empty '' !! Do you please have any idea why it didn't work?

Best regards,

[tgandor]

Hi Youssef,

this is the old, non-headless screenshot mechanism. For the new mechanism see this example: https://github.com/K3D-tools/K3D-jupyter/blob/main/examples/headless.ipynb

For this example: https://github.com/K3D-tools/K3D-jupyter/blob/main/examples/screenshot_generator.ipynb you need a few things:

• running in jupyter notebook or lab (which you probably do)
• execute cells one by one (not: Kernel -> Restart and run all)
• pause a little after fetch_screenshot

or use the generator approach further down in the example.

[youssefassis]

Thank you Tgandor, It works using the headless screenshot mechanism.