Kasper Peeters wrote:

> I want to 'plot' a curve (for which I know the parametric expression,
> i.e. the three coordinates as a function of a single parameter) and
> give it some thickness (like a thick rope). So I'm looking for
> something like sphere_sweep, but with the curved described by my
> parametric expression, not by a spline.
> 
Why don't you evaluate your function at regular points (regarding to the
single parameter) and feed that to the sphere_sweep? 

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