• Yes, that is exactly how I came to that algorithm. I had been trying to create a solid ring. At one point in desperation I started with the same polygon approach you tried, but I stopped when I hit the point limit.

    It isn't described on the English wikipedia, I don't think I saw it on the German one either even though it lists many more circle drawing algorithms than the English one.

    I haven't been able to read the original paper by Andres, it is paywalled, but I have read some of his later papers* and others that expand on the work. If you want to see the proof (or just out of interest) they can be found online.

    • I say read, but I don't understand most of it. It took me a long time before I even remembered how the notation for sets worked.
  • It always surprises me to see how many ways there are to solve a given problem - and what brilliant solutions some people were able to invent!