William F Pokorny <ano### [at] anonymousorg> wrote:

> IIRC, Bald Eagle (Bill Walker) had a write up for the feature a few
> years ago which might help.

The monograph covers the basics of how Bezier surfaces are constructed, along
with the practical aspects of using them in POV-Ray.  Things like uv_mapping and
using Bernstein polynomials to locate points that are actually on the surface of
the patch - rather than the intermediate control points which do not coincide
with the surface.

> He, in fact, taught me how it was actually
> working - as opposed to how I thought it was working!

Wow.   Thanks Bill.  It did take me a bit longer than I expected to sift through
all of the features, do the code experiments, and try and get it all to flow and
make sense.

> I have early
> versions of the document somewhere, but I'm unsure if it was posted
> anywhere public.

Now posted:
https://wiki.povray.org/content/User:BillW

- BW

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