Generate a Scale bar? about 3dhop HOT 1 CLOSED

Hi there, thanks for reaching out.
It is certainly an interesting idea. However, it is difficult to implement it in an automatic way :(
It would be a mess to decide automatically which size should be the bar, which kind of subdivision (every 1-5-10-100 units), and where to place it into the scene such that it is useful/visible/unoccluding.
We have done it, case by case, creating custom geometries by hand, tailored to the specific scene.
For orthographic camera it might be easier, as we can superimpose a ruler on the canvas, and could easier to guess the correct parameters.

from 3dhop.