"Kenneth" <kdw### [at] gmail com> wrote:
> IIRC, sphere_sweeps using a cubic spline have been problematic for a *long*
> time.
I was unaware of this.
>If it were possible to do, I would suggest adding the 'natural_spline'
> type to the sphere_sweep code. I don't know the math differences between natural
> and cubic splines (or if one is mathematically 'simpler' than the other) but it
> might give us at least one way to make curvy sphere_sweeps that can be
> CSG-differenced from another object.
Maybe for the time being you could use:
http://www.econym.demon.co.uk/isotut/splines.htm
it may be slower, but would give good end results straightaway.
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