MantisBT - Open CASCADE
View Issue Details
0025925Open CASCADE[OCCT] OCCT:Modeling Algorithmspublic2015-03-13 10:302018-07-02 10:41
[OCCT] 6.9.0 
[OCCT] Unscheduled 
0025925: BRepOffset_MakeOffset works unstable for faces containing seam edges
The algorithm of offset shape (BRepOffset_MakeOffset) works unstable when a shape contains a face with seam edge.

The cause of the issue is that the algorithm used to make loops of new faces from offset edges (BRepAlgo_Loop) cannot correctly work when on input it has a seam edge in the set of edges, and this edge occurs to be the starting of the loop.

It is proposed to use instead another more stable algorithm of building loops that is used in new Boolean operations.
bugs modalg_2 bug5805_19,bug5805_41,bug5805_42,bug5805_43
offset faces_type_a A3,A4,A9
No tags attached.
Issue History
2015-03-13 10:30msvNew Issue
2015-03-13 10:30msvAssigned To => msv
2015-03-13 12:16msvRelationship addedrelated to 0025926
2015-03-13 12:17msvNote Added: 0038315
2015-03-13 12:17msvAssigned Tomsv => emv
2015-03-13 12:17msvStatusnew => assigned
2015-03-13 13:51shoogenNote Added: 0038318
2015-03-13 14:11shoogenNote Deleted: 0038318
2018-07-02 10:41msvNote Added: 0077186

2015-03-13 12:17   
Dear emv, please check the state of this bug after development of related #25926.
2018-07-02 10:41   
The test cases offset faces_type_a A3,A4,A9 became OK with the patch for #29861.