project sketch on face issue

[Cekuhnen]

I notice that in one case the projection correctly is inside the face but in the other case extends beyond the face

Any idea what causes this?

Screen Shot 2021-07-23 at 9.23.53 AM.png (122.42 KiB) Viewed 443 times

OS: macOS 10.16
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24276 (Git)
Build type: Release
Branch: (HEAD detached at 0.19.1)
Hash: a88db11e0a908f6e38f92bfc5187b13ebe470438
Python version: 3.8.8
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.4.0
Locale: C/Default (C)

[chrisb]

Two guesses which you may investigate:
- Your model shows errors. Does it look the same if you fix them?
- One projection is on a cylinder, which is a simple form compared to the loft.

[Cekuhnen]

Chrisb where do you see the errors ?

What am I missing?

Screen Shot 2021-07-23 at 10.35.54 AM.png (28.5 KiB) Viewed 412 times

[Shalmeneser]

* PAD : beyond the face
* LOFT : only the face

(no error for me)

[chrisb]

Chrisb where do you see the errors ?

There are "Link goes out of allowed scope" errors. You see them in the Dependency Graph as red arrows.

[Cekuhnen]

even when rebuilding and instead of blending to a solid face to a surface face the projection overshoots
dependency graph also is all green

dependency graph.png (119.99 KiB) Viewed 342 times

[chrisb]

If you want to investigate the errors, you have of course to investigate the file where the errors were detected. This is the dependency graph:

[Cekuhnen]

the features are clean in each file

building blend surfaces from solid faces gives you the error in the dep graph

building it from a shell does not give error in the dep graph

however

projection error remains no matter of dependency graph error or not

this likely rules out that the error in the dep graph is a cause for projection to not work