Dear @Gijs
somehow it’s a pity to not see a pure / vanilla Rhino solution.
X-nurbs (as far as i know @XNurbs ?) is not available for mac
and I think this is a nice example, that shows some deficits in the rhino toolset regarding concept modelling with complex transitions.
(and i would love to see a single-span Class-A solution as well @Rhino_Bulgaria what about joining the party ?)
this is my rhino-only-tools apporach:
rework revolve like surface
reworked the initial pseudo-revolve to have less shear in the isocurves, set it up as approximation / deformable / rational
use an additional surfaces “cone like ring” (green) als helper.
1st blends
some _blendCrvs to find trim concept / positions / matching shapes.
initial blends
2nd blends
using some additional construction lines to make sure trimming is nice at (x)
trimming the 1st blends (blue)
blending the gabs (violett)
zebra
deficits
maybe my apporach is wrong - I would love to have more rules regarding how to find nice trims. But it would also be nice to have some interactive tools, that support trimming (position) + blending
I normally look at Curvature(graph / analysis), do a test filletSrf to see minimum required space - but the rest is more intuitive / visual. If there is more to learn - would be happy to see some resources.
especially for the 2nd blends _blendSrf did not help me.
I used some initial _loft and then some massage with _matchSrf, _changeDegree _insertKnot and some CV edit inbetween…
_matchSrf with refine yes messed up with 1000s of knots
looking forward to see other pure rhino apporaches.
kind regards from a rainy afternoon ( i expected snow) - tom