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Archived issue #0025925

BRepOffset_MakeOffset works unstable for faces containing seam edges

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Description

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.

Steps to reproduce

bugs modalg_2 bug5805_19,bug5805_41,bug5805_42,bug5805_43
offset faces_type_a A3,A4,A9

Public activity

2 archived notes

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01Commenter 1
Dear emv, please check the state of this bug after development of related #25926.
02Commenter 2
The test cases offset faces_type_a A3,A4,A9 became OK with the patch for #29861.