Dockerized Trame web app viewport resolution horizontally stretching

[nathanWhitacre]

Hello. I am working on a project with Trame/VTK for a data visualizer, utilizing widgets for probing the data at different coordinates selected by the mouse position on top of a 2D actor. I'll preface this post by stating I'm not an expert in either Docker or Trame/VTK.

I've run into an issue where upon running a Docker container, any interactions with the actor causes the entire viewport to stretch and lower the resolution. This also causes the point picking with the mouse to be offset significantly. This does not occur if running the code locally (without running a Docker instance).

I've noticed that this issue occurs not only when running my app, but also when running the deploy docker example: [https://github.com/Kitware/trame/blob/master/examples/deploy/docker/VtkRendering/app.py]
(Although with the deploy docker example, the stretching happens automatically without interaction a few moments after connecting to the app)

Any help with this issue would be highly appreciated!

[jourdain]

Usually the lower the resolution part is related to interactive_ratio= not being set to 1 for remote rendering. The example provided do set that option, so I'm not sure exactly to know/understand what you mean by stretch. Maybe a small video/screen-capture could help understand it.

Also are you running docker with GPU access or CPU only? You can test the rendering backend resolution using that tool inside your docker.