Please try to reproduce on development build (https://github.com/FreeCAD/FreeCAD-Bundle/releases/tag/weekly-builds) and report back. TIA

Are you using https://wiki.freecad.org/TechDraw_ExtensionCircleCenterLines?
I don't think that function is smart enough to know that the circle has changed. It just creates a cosmetic edge based on the circle geometry at creation time.
@edi271 any comments?

Are you using https://wiki.freecad.org/TechDraw_ExtensionCircleCenterLines?

Please try to reproduce on development build (https://github.com/FreeCAD/FreeCAD-Bundle/releases/tag/weekly-builds) and report back. TIA

The same result

Are you using https://wiki.freecad.org/TechDraw_ExtensionCircleCenterLines? I don't think that function is smart enough to know that the circle has changed. It just creates a cosmetic edge based on the circle geometry at creation time. @edi271 any comments?

Correct. I don't know any method to change a cosmetic line. For example the extend/shorten line tool deletes the old line and creates a new one.

@WandererFan is this a feature request then ?

@WandererFan ping

on the list....
...
- hatching is only on 1 face? there was a fix for this *** fixed

• cosmetic circle by center & radius [Feature request] Define cosmetic circles by center and radius #10352
• Annotations
  ...

Same problem on my dev version discussed here: https://forum.freecad.org/viewtopic.php?t=82182

With Segmentation fault crash on Version: 0.22.0dev.34523 (Git)

No crash on version 0.22.0dev.34789 (Git), but error messages:

DVP::getProjVertexByIndex(11) - invalid index
DVP::getProjVertexByIndex(13) - invalid index
CL::scaledGeometry - failed to calculate endpoints!
CE::addCenterLinesToGeom - scaledGeometry is null
DVP::getProjVertexByIndex(12) - invalid index
CL::scaledGeometry - failed to calculate endpoints!
CE::addCenterLinesToGeom - scaledGeometry is null
<Exception> Dimension Reference has null geometry
<Exception> Dimension Reference has null geometry

When moving the circle object reference.

@++;
Gauthier.

@WandererFan what is the proposed fix here. Perhaps another dev would step up with a fix if they were provided orientation ?

In general, the functions in CommandExtensionPack just draw things based on the current state of the model. They don't participate in the normal recompute cascade or remember the parameters used at creation time.

We'd need a new document object created that would have properties to remember that a centre line was created for a given circle (view+geometry element) and update itself when the view that owns the circle changes. Since the circle is a subelement of the view, the toponaming exposure is significant, and the object would need all the reference checking and repair functionality that is in DrawViewDimension.

The problem statement sounds like all that is needed is to insert a line of code somewhere that calls recompute(). In fact, this (and a number of other Extension related tickets, like face area) needs significant changes.

Looks related to downstream arch bug: https://bugs.archlinux.org/task/73944

Steps to reproduce:

1. Open FreeCAD from the repos
2. Open e.g. the attached demo file
3. Note how in the TechDraw page, there are no arc center marks even though they are set to be visible.
   Example file: https://bugs.archlinux.org/task/73944?getfile=21228

The center lines drawn by the extension pack are not related to the center marks that are attached to every circle/arc. The center marks are the ones that don't appear in some linux versions.

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