Fillet and intersect - bugs are food for hungry developers

Dear @sfp and @menno

this is food for you both ;-D
At least Sam seams to be hungry.

kissing tori

filletSrf does not find this green surface which is a fillet from a torus to a plane.
my guess it has to do with some intersection / pull issue as at the end the surface that is not found should share an edge with the first tori.
(only somehow similar to this topic - all examples are about tori that do intersect - or fail to…)


instead we get his mess

trying filletSrf on a part of the surface

hier comes the nutrients:
changing U-V-N at least part of the surface is found !

for the kissing tori, after changing UV:
filletSrf preview looks promissing


final result fails

starting digging i also had some strange pull results with the center curve / circle of the searched torus pulled towards the thinner torus.
this pull result also changed with changing UVN…
but could not repeat.

this geometry is taken from this fillet challenge:

where my students should learn to see a revolve is a better approach then a fillet.

kissingToris_filletBug.3dm (5.2 MB)

hier is more intersection / pull stuff:

kind regards -tom