Thank you for your help, everybody. There seem to be a clear majority for B.

On all three variants the bottom third of the shaft is a cylinder. On A 
the rest is a cone. On B the rest is an ellipsoid (or stretched sphere, 
if you like). C is a combination, where the middle third is an 
ellipsoid, and the top third is a cone. The diameter where the two parts 
meet is halfway between the diameters in the same place on A and B.

Personally I think that C looks more like the drawings in the book than 
the two other. Hmm, maybe I should give the lathe object a shot, like 
Anders K suggests. After all, IIRC the Bezier spline was developed to 
simulate the behaviour of flexible rulers.

/Ib

Post a reply to this message