Hi Rudl,
not sure if this is what you want but it is made up of planar faces.
I constructed a polyline going thro the points shown on your drawing ie base curve
and another on the Z axis curve.
Extrude the base polyline along the path of the Z axis polyline and then trim to
120 degree.
Barry-H

Cool but all facets are not all "quadrangular" on the 120° arc face!

I meanwhile have found this soluion.

Looks good Rudl! Just be careful - only having 4 lines on the outside of a surface does not just by itself make a surface to be planar. If you're using a construction tool like sweep or network to build a surface between any 4 lines it's pretty easy for that surface to be warped in some way instead of being flat.

If you created all those surfaces by using Construct > Planar or Draw solid > Plane then it should be ok though.

- Michael

Bravo!
As always, that was very simple but some headache for find it!
And that is "cutting" diamond!
And Lineweb works fot that! ;)
In twice for special threatment for the top!

The lower rows I made with plane through 3 points, scaled them up, intersected them and trimed them. The top I made with a polygon and filled it. I had a lot of try and error, finally the sequence was important.

Rudl

Yes, lineweb helped. It was a mixture of the suggestions I got.

:)

hallo FP,

lineweb did not make planar quads. It was just for orientation.

Rudl

Hi Rudl, yup that's right - LineWeb just makes a bunch of lines, and just having any 4 lines connecting end to end does not by itself mean that they are planar.

It sounds like you have taken all of this into account now with your final result though, I'm glad you were able to finish it! :)

- Michael

yellow is lineweb.

Works if each side have the same measure! (so I can't obtain exactly the same result than your :(
And polyline N°1 is rotated from an external center!
Each facet is planar but Planar function itself can't work for all facets in one click because some segments are not doubled! :(

Hi Pilou, yes for the special case where each polyline that you created like that is an exact copy of the other and only rotated that will work, but that's pretty different than just running line web on a series of general curves. In the general case doing lineweb between any kind of smooth curves you will not likely get planar results.

- Michael