Pour le cas présent, cet outil « Sketch on surface » de l'Atelier Curves (Outil aussi présent dans l’atelier Sketcher et que j’utilise parfois … au risque de plantage dû aux fameux « problèmes de dénomination topologique » en cas de modification des sketchs) présente le bizarre défaut de ne pouvoir...

FreeCAD changed some method names in version 0.22 So Curves was updated based on version 0.22 as the threshold. Then the name change has been backported to version 0.21.2 But Curves has not yet updated its version threshold from 0.22 to 0.21.2 This is why several Curves tools output errors on FC 0.2...

This should be fixed in new version 0.6.25
Please update and give a try.

This kind of artefact is probably a tesselation bug.
Try decreasing View Deviation and Angular Deflection.

Thanks Ed.
I'll fix this.

Thanks a lot for you feedback.

I have some suggestion'S for modification's to improve the functionality to get more advanced as other analysis tools see attached file Hi, I don't know anything about injection moulding. For Suggestions 1 and 2 in your PDF, that should be possible. What are precisely the additional info to display...

The Gordon surface performs without errors in this FC version compiled yesterday : OS: Manjaro Linux (KDE/plasma) Word size of FreeCAD: 64-bit Version: 0.22.0dev.36350 (Git) Build type: Release Branch: main Hash: d3e790cf21ffeb564e2cc582451573198ff3d0ba Python 3.11.7, Qt 5.15.12, Coin 4.0.2, Vtk , O...

@Chris_G, this is a helpful illustration of FreeCAD interpretation. Is this the Sketcher workbench? (I am reasonably conversant with the FreeCAD Python API, running it as a standalone geometry engine, but less so with the GUI. Are the images you show generated by the stock FreeCAD GUI?) It is the G...

When I try converting FreeCAD's native ellipses to BSplines, rational and non-rational, I get closed, but non-periodic BSplines. Yes, i have always found this strange. You need to explicitly set periodicity with : bspline_curve.setPeriodic() and eventually raise the continuity at join point with : ...