Support for Web open3d visualizer

[Shaamsi]

Can pytransform3d support web visualizer by open3d:
you just need to add this here:
o3d.visualization.webrtc_server.enable_webrtc()

tutorial here.

so we do not have to do fig,show() but use the browser, is it possible to have it?

[AlexanderFabisch]

Hi @Shaamsi , I looked into it and I guess it is a bit more complicated. The Figure class does not use the open3d.visualization interface. It uses the open3d.visualization.Visualizer class (and VisualizerWithKeyCallback).

If I read the patch notes for Open3D 0.13 correctly, the Visualizer class will also be deprecated in Open3D 0.14, so I have to make a transition to the new Open3D viewer as well. Furthermore, I was planning to offer the OffscreenRenderer as a backend (#95). It is currently a bit unpredictable how we can make all these things work with the same interface.

If you have any suggestions, let me know!

I also don't plan to use the web viewer at the moment, so the time that I can invest in it is limited.