folkert wrote:
> Any hints how I convert a 4-point square into the 16 points of a bicubic_patch?
4 points do not uniquely define a "quadrangle" in 3d space,
so you need to be a bit clearer on the shape of the object
you wish to produce. The simplest way is two triangles with
a sharp edge but even then there are two ways of splitting
that yield a different shape.
