Wow...impressive! I can't wait for this to be finished...

Francois Dispot wrote:
> 
> A sample from the current work, which is a megapov macro to make tyres
> (1st pic) with isosurfaces given the shape of the "sculptures" (en ?) as
> a png bitmap (2nd pic).
> 
> Now I have a problem. The lateral parts of the tyres are made with
> lathes, and I would like to connect them smoothly to the deepest part of
> my isosurface, which is a 4th degree profile. I know the tangent to my
> profile, and need to keep the same on the lathe. So my question is: what
> is the slope of a cubic_spline lathe profile at one of its control
> points?
> 
> TIA.
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