I had honestly never heard about Hobby splines. In my day to day exposure to the various programming languages and graphics suites, they simply never came up (a

I had honestly never heard about Hobby splines. In my day to day exposure to the various programming languages and graphics suites, they simply never came up (as opposed to Catmull-Rom, which is a mainstay of Processing -the language- for instance). I've been in touch with Raph before, and very much enjoy the beauty of Euler spirals, but I've not found the right way to present them in the Primer yet. They can't be perfectly represented by Bezier curves (his phd thesis covers this), so we end up with a section similar to the circle apprximation sections, but then for a type of curve that most people will be unfamiliar with, so it needs a pretty solid description to not feel like a completely new topic "forced" in.