View Issue Details

IDProjectCategoryView StatusLast Update
0003571PartBugpublic2019-02-21 15:27
ReporterJLienard Assigned Towmayer  
Status closedResolutionfixed 
Product Version0.17 
Fixed in Version0.18 
Summary0003571: Offset3D of volumes intersection is not solid
Description-Intersection of two cubes
-Offset3D of the result
-Union of the result with another cube = > error "Performing union on non-solids is not possible"

Steps To Reproduceexecute the code of the attached file, then make union of "Offset" and "Cube002"
Additional InformationOS: Ubuntu 16.04.5 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.13541 (Git)
Build type: None
Branch: releases/FreeCAD-0-17
Hash: 9948ee4f1570df9216862a79705afb367b2c6ffb
Python version: 2.7.12
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: French/France (fr_FR)
TagsNo tags attached.
FreeCAD Information


related to 0003703 closedwmayer Part->3D-Offset should warn if resulting object is not a solid 



2018-08-30 15:13

reporter (Attachment missing)


2018-08-31 06:43

administrator   ~0011673

@JLienard Can you please test this on 0.18dev


2018-08-31 07:12

reporter   ~0011674

The bug remains on :
OS: Ubuntu 16.04.5 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.14495 (Git) AppImage
Build type: None
Branch: master
Hash: c717d1121d888fe6cfbd8971b5f59311a34b37bc
Python version: 2.7.6
Qt version: 4.8.6
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: French/France (fr_FR)


2018-08-31 07:52

administrator   ~0011675

@JLienard Thank you. Please open a forum thread in to discuss the issue with the community (as per our bug submission guidelines)
Please post the link to said forum thread in the ticket for future reference.


2018-09-02 19:35

manager   ~0011683

The produced Offset is not a solid, it's a shell. Not sure why. This is not the place to ask, the forum is more suited, but your script shows an extremely convoluted method to get a shape. Why couldn't you create a box right from the start? Offsetting a cube produces a valid solid. Is this some simplification of a use case?


2018-09-02 19:42


Part_Offset3D_from_Common.fcstd (Attachment missing)


2018-09-02 19:42

manager   ~0011684

It appears that Offset3D based on a shape resulting from a Part Common operation does not create a solid, but a shell. Here is a more proper file that shows the issue, with two cubes that share no co-planar faces (something that should be avoided as much as possible when applying Boolean operations).


2018-09-02 19:48

manager   ~0011685

Actually, any Offset3D applied to a solid resulting from a Part Boolean operation (fuse, cut, common) will produce a shell rather than a solid. This is possibly only an oversight. Offsetting a PartDesign Body comprising of a pad and a pocket produces a solid.


2018-09-30 16:56

developer   ~0011879

The solid that results from Common operation is encapsulated into a compound.
If I apply the Offset directly on the solid, the result IS a valid solid.
So, this "Compound encapsulation" may explain the bug.


2018-09-30 20:41

administrator   ~0011880

Issue History

Date Modified Username Field Change
2018-08-30 15:13 JLienard New Issue
2018-08-30 15:13 JLienard Tag Attached: py
2018-08-30 15:13 JLienard File Added:
2018-08-31 06:43 Kunda1 Status new => feedback
2018-08-31 06:43 Kunda1 Note Added: 0011673
2018-08-31 07:12 JLienard Note Added: 0011674
2018-08-31 07:12 JLienard Status feedback => new
2018-08-31 07:52 Kunda1 Status new => feedback
2018-08-31 07:52 Kunda1 Note Added: 0011675
2018-09-02 19:35 normandc Note Added: 0011683
2018-09-02 19:42 normandc File Added: Part_Offset3D_from_Common.fcstd
2018-09-02 19:42 normandc Note Added: 0011684
2018-09-02 19:48 normandc Note Added: 0011685
2018-09-30 16:56 Chris_G Note Added: 0011879
2018-09-30 20:41 wmayer Assigned To => wmayer
2018-09-30 20:41 wmayer Status feedback => closed
2018-09-30 20:41 wmayer Resolution open => fixed
2018-09-30 20:41 wmayer Fixed in Version => 0.18
2018-09-30 20:41 wmayer Note Added: 0011880
2019-01-13 11:12 Kunda1 Tag Detached: py
2019-02-21 15:27 wmayer Relationship added related to 0003703