"Alfred Knudson" <nomail@nomail> wrote:
> So, it is really true that there is no framework to "draw" on a surface? And one
> has to mimic it with pigmentation, sequence of cylindes, ....

There are a few spline based shapes, spheresweep, sor and prism. But with these
you are bound to the spline options they provide.

An alternative is to loft along a spline or curve and thus create a mesh, then
you have full freedom. Look at meshmaker.inc in the distribution for some ideas.
curves.zip at https://ingoogni.nl/download/ has many curves and splines. One
could also loft one parametric along an other parametric, for example to create
a torus.

ingo

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