BMeshViewer to generate UV and retain between updates when topology is static.

Created by: enzyme69

I have this dilemma with UV Map when working using Sverchok. I knew this matter will eventually arise.

1. I am generating some kind of random mesh using Sverchok and output it as BMesh.
2. Once happy with random mesh, I am doing this UV projection and make UV nice.
3. Next step however, I want to be able to animate and modify the mesh, while preserving the UV. In the past, I just use Ctrl + L to transfer UV from mesh with good UV to final 3D object tweaked in Sverchok.

Blender has DataTransfer Modifier that actually do transfer UV on the fly, however this failed because whenever Sverchok updates the mesh, the UV disappear. So currently my "hack" is to use Exec Node to do smart_project(), but maybe not the best:

Any tips on this? Thanks!