This is some software I originally developed as part of an undergraduate thesis at UC Berkeley back in the eighties. I’ve updated it intermittently over the years as the C language has evolved.
The most recent version of the code (which is still pretty old) is now up on Github. Here’s a video of the code in action:
I used the Conway knot in the video on honor of Dr. Lisa Piccirillo’s recent solution to the Conway Knot Slice question. She published her result in Annals of Mathematics, Volume 191, 2020.