Widget in 3D space

Nuklear is wonderful gui. What can makes it more wonderful? The possibility to use it as info billboard on top of a unit. Is there a way? For example

(not my screenshot, found in the internet)

Is there a way to render text on top of theese guys using Nuklear? I beleve it is needed to pass some 3d matrix to every nuklear window and catch it in nk_convert... Something like that. How can I deal with it?
PS: if its already answered, Im sorry - google gives nothing

Start at nk_convert, the conversion entry point named in the issue, and trace how Nuklear windows are represented before rendering. The issue does not name files or tests, so the 3D placement and matrix-handling requirements must be settled first; done would require a defined, reproducible way to render text over 3D units.

Written by the indexing model from the issue text.