Complex Sections

[FBXL5]

How about this?
- ProjectionStrategy = Single. Much the same as a regular section, except it uses a profile instead of a section plane. All projections are made according to the SectionNormal.
- ProjectionStrategy = Piecewise. Every segment in the profile generates a face in the result; Projections are based on profile segment normals.
- ProjectionStrategy = NoParallel. As Piecewise, except profile segments that are parallel with the SectionNormal are ignored. This would do your "several parallel offset sections" if the profile only contains vertical and horizontal segments.

I'm confused by "one for angled section planes"

I'm sorry, I meant "aligned section view"

I altered your image:

OffsetAligned.png (37.38 KiB) Viewed 1202 times

I think we just need one Offset option (no parallel and no oblique to the normal) and one Aligned option (piecewise, only oblique and perpendicular to the normal ) and both shouldn't be mixed.

I hope this helps to clarify.

[Kunda1]

I haven't read the whole thread, is there any effort in documenting this feature on the wiki happening ?

BTW wandererfan, this looks awesome!

[wandererfan]

I haven't read the whole thread, is there any effort in documenting this feature on the wiki happening ?

TechDraw_ComplexSection

[NewJoker]

Now it's just a matter of adding it to release notes.

[domad]

.......

@wandererfan
The "Complex Section" function crashes FreeCad if you use the choices "Projection Strategy" -> other than "Offset", it also happens when you check "Live Update".
The crash should not happen whatever the input condition.

Code: Select all

OS: Linux Mint 20.3 (X-Cinnamon / cinnamon)
Word size of FreeCAD: 64-bit
Version: 0.21.30811 (Git) AppImage
Build type: Release
Branch: master
Hash: c490b93173ff90f7ed8de270d674530d5995446e
Python 3.10.6, Qt 5.15.4, Coin 4.0.0, Vtk 9.1.0, OCC 7.6.3

[wandererfan]

The "Complex Section" function crashes FreeCad if you use the choices "Projection Strategy" -> other than "Offset", it also happens when you check "Live Update".

I can't reproduce based on the information provided. Could you please provide your test file and steps to reproduce?

[domad]

.....

Hello wandererfan, greetings to the Community!
Of course, here is the file (it's the usual one with holes and a slanted slot), FreeCad crashes both with the sectioning "path" as wire and as sketch, it doesn't happen with the "Offset" choice.

[wandererfan]

[The "Complex Section" function crashes FreeCad if you use the choices "Projection Strategy" -> other than "Offset", it also happens when you check "Live Update".
The crash should not happen whatever the input condition.

Just to make sure I'm fixing the same thing you are seeing, I don't get a crash, but a message: "Unhandled unknown exception caught in GUIApplication::notify"

If that is the same thing you are getting, it is because there is a segment of the profile that falls entirely outside the shape. This creates a Compound shape that has no content, but is not considered Null by OCC.

So to fix this, I'm putting in a check to make sure that there is actually something inside the Compound.

If you are seeing something different, please let me know.

[domad]

...

Greetings to the Community!
@wandererfan, in the gif what happens, a crash without any communication/warning in the Report

[M4x]

What are you getting if you're running FreeCAD from the command line?