>From my experiments, it doesn't matter if the start point is defined once or twice. ----- Larry -- View this message in context: http://forum.openscad.org/Spline-interpolation-nSpline-tp15207p15398.html Sent from the OpenSCAD mailing list archive at Nabble.com.

Hi Johan, I just updated sweep() and it fits your needs now. You can download it from http://www.thingiverse.com/thing:1208001 BTW sweep() is NOT a full blown algorithm you can use with any shape. It consumes convex shapes and weakly symmetric shapes like airfoils only, but NO fancy stuff. skin() has a more general implementation. Don't forget to use the proper version of circle_() now. > function circle_(r, N) = [ for(i=[0:N-1]) let(angle = i*360/N) > [r*sin(angle), r*cos(angle)]]; - Rudolf -- View this message in context: http://forum.openscad.org/Spline-interpolation-nSpline-tp15207p15406.html Sent from the OpenSCAD mailing list archive at Nabble.com.

Hi Parkinbot, Sorry for my very late reaction. I was very busy with a lot of things. But today I again encountered the small bugs with your earlier version of sweep and thought. Maybe Parkinbot has already made a new version. And YES, that is the case! And is it working perfect now! Many thanks for that!! kind regards Johan -- View this message in context: http://forum.openscad.org/Spline-interpolation-nSpline-tp15207p16608.html Sent from the OpenSCAD mailing list archive at Nabble.com.