Faces of complex sketch filled incorrectly

[kalbfuss]

I am trying to map a drawing (sketch) to a curved surface. The mapping works in principle, but faces enclosed by the paths are not filled correctly. This is the sketch I am trying to map:

As far as I can tell, all the paths are closed. If I use the "Make face from wires" tool in the Part workbench, the result is as expected:

When I map the sketch to my curved surface, the faces between the paths are no longer filled correctly, but spill over:

The reason is unclear to me. I would expect the faces to be filled as by the "Make face from wires" tool. Since the sketch is the same in both cases, I suspect this is a problem in the Curves workbench.

Here is the FreeCAD file I have created and which can be used to reproduce the problem:

Engraving.zip

And here is my FreeCAD version information:

OS: Ubuntu Core 22 (ubuntu:GNOME/ubuntu-xorg/xcb)
Architecture: x86_64
Version: 1.0.0.38641 +468 (Git) Snap 1248
Build type: Release
Branch: tag: 1.0.0
Hash: 2fcc5317fe3aee96ca73475986a577719fc78e20
Python 3.10.12, Qt 5.15.10, Coin 4.0.0, Vtk 7.1.1, OCC 7.7.1
Locale: German/Switzerland (de_CH)
Stylesheet/Theme/QtStyle: FreeCAD Light.qss/FreeCAD Light/Fusion
Installed mods: 
  * lattice2 1.0.0
  * Curves 0.6.51

Any help appreciated on the subject. I am happy to do more testing as instructed.

[kalbfuss]

I have done a bit of research in the meantime. I assume the problem is that my sketch contains closed paths within closed paths. It is thus not sufficient to fill the area between the paths. In addition, the area spanned by the inner closed paths must be subtracted from the area spanned by the outer closed paths. Otherwise the result looks pretty much like what the Curves workbench produces currently.

[tomate44]

This is a known issue.
It will be fixed in the WIP code refactor of this tool.

[luzpaz]

@tomate44 is there a way you want to track this ticket with regards to the WIP code refractor ? Perhaps give it a label ?

edit: or assign it to a milestone ?