How to implement a visual constructor in JS?

Question

css

Tell me how to approach the creation of such a constructor:

I thought of doing pseudo-3D on CSS transform, but what about the volume? Or is there some better method?
Rotation in all directions is not necessary, only along the wall and a view from above.

Answer 1

webGl
https://gist.github.com/dmnsgn/76878ba6903cf15789b...
three works with .obj