I have modified a few existing STL files by importing them and then adding/subtracting with SCAD and it's worked out well :-) However, I now need to modify one by making the center 10% portion of a hollow shape longer.  The rest needs to remain the same so a simple scaling operation wont work. Can anyone suggest the best approach to this problem ? My initial reaction is to cut it into 3, stretch the middle bit and stick it all back together but I wonder if there is a better way. TIA Dave

Hi Dave, I'm struggling to envisage exactly what you want to do, and the answer will depend on the actual object. But, if the object edges at the middle are parallel to the axis you want it to expand in, then just union the original object with a copy that has been offset by the desired amount. Frank On Mon, May 10, 2021 at 10:57 AM Dave <softfoot@hotmail.com> wrote: > > I have modified a few existing STL files by importing them and then > adding/subtracting with SCAD and it's worked out well :-) > > However, I now need to modify one by making the center 10% portion of a > hollow shape longer. The rest needs to remain the same so a simple > scaling operation wont work. > > Can anyone suggest the best approach to this problem ? My initial > reaction is to cut it into 3, stretch the middle bit and stick it all > back together but I wonder if there is a better way. > > TIA Dave > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >