For the record here some outputs of Groove tool, In order to be more useful I must add to Nautilus a tool to orient the quad faces with curves or angles
A bit more better, for sure a C# script allows some more robust grooves. It is so simple it must exist in a plugin (mesh+, Pufferfish …)
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Rapid explanation, understand who can understand
I take a quad mesh face and I subdivide it and displace it
Lets say alpha is a coefficient that is 0 on point A, and 1 on point B
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Interpolated points between A and B are calculated with
For the number of subdivision i from 0 to n-1
alpha = i/(n-1)
point = ptA …