Good to see you exploring different ways to exploit lisp for tool making. Feel free to lift ideas from this post from yesteryear. Cheers.
Ahh, thanks for sharing - I didn't expected anything related!
I was searching before, but couldn't find anything - perhaps of the lack of important keyword(s):
grdraw /
grvecs.
So I guess it would be nearly impossible to find something similar without help, since 95% of the threads related to
point(s) are about dealing with vertices / xyz coordinates / trans / bla-bla...
BTW I thought, that I could play a bit more, so the geometry could replicate the one to the PDMODE variable, but it would be a bit too much (considering my task is already solved).