Is it possible to get a lossless (or even lossy) upgrade of a Spiro spline to a Hyperbezier?

Nobody has claimed this yet.

Now that I have implemented https://github.com/MFEK/spiro.rlib, I am very curious if it's possible to _upgrade_ my Spiros to the superior Hyperbezier.

I have a lot of Spiros, that's why I maintain it.

In https://github.com/raphlinus/raphlinus.github.io/issues/40 @raphlinus wrote:

> Introduction: hyperbezier is a synthesis of three curves: cubic bezier, euler spiral, and elastica. Tension is a central concept.

This is very similar to how Spiro works, if I understood the thesis right. So really perhaps hyperbezier is "spiro v2", but perhaps that's ignorant of the maths of it all.

Is there a way to upgrade Spiros, Raph?

Start with the existing spiro.rlib implementation and the linked hyperbezier discussion in raphlinus/raphlinus.github.io#40. Compare the curve models and representations to determine whether Spiro data can be converted losslessly or approximately. Done means documenting a justified conversion approach, limitations, and any required design changes.

Written by the indexing model from the issue text.