Variable-width Bézier curves (2025)

In case the author reads this:

>The stroke boundary algorithm could be extended to 3D by generating a ring (instead of a pair) of stroke boundary points at each sample point. I do not know of compelling uses for such a 3D element.

That would actually be an excellent way to describe a V-carving toolpath for a CNC router.

It's a breath of fresh air to see an article that so clearly and carefully explains a concept amongst the sea of llm-prose.

Why is there not a single picture in an article about Bézier curves?