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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0030454||Community||[OCCT] OCCT:Modeling Algorithms||public||2019-01-22 21:01||2019-12-17 13:50|
|Product Version||[OCCT] 7.3.0|
|Target Version||Fixed in Version|
|Summary||0030454: Modeling Algorithms - BRepBuilderAPI_Sewing fails after BRepAlgoAPI_Fuse|
|Description||In previsous versions of OCCT (e.g. 6.8), calling BRepAlgoAPI_Fuse with faces and shells resulted in a shape that was a single shell. However, with OCCT 7.3 BRepAlgoAPI_Fuse returns a shape with multiple faces/shells. To achieve the old behavior we have tried to follow BRepAlgoAPI_Fuse with BRepBuilderAPI_Sewing. This generally works, but the attached example returns 2 shells from the sew operation when we expect to get 1 shell. I have a 2 questions:|
1) Is there a better option to get the old behavior of BRepAlgoAPI_Fuse to return a single shell without using sewing?
2) I believe BRepBuilderAPI_Sewing should return a single shell with the attached example.
|Steps To Reproduce||Compile and run the example in the attached tar file.|
|Tags||No tags attached.|
|Test case number|
|Attached Files|| Fuse_Shell.tgz (7,794 bytes) 2019-01-22 21:01|
Fuse_Shell2.tgz (31,810 bytes) 2019-01-23 19:12
|Update. I just noticed if I sew the result from sew one more time I get the single shell I'm looking for.|
I've attached a 2nd case (Fuse_Shell2.tgz) where repeating the sew operation does not work.
In summary. The files src.brep and tool.brep give the expected result if sew is called twice. sec2.brep and tool2.brep do not give a single shell even after calling sew twice.
|I just wanted to confirm that I still see this issue in OCCT 7.4. Any guidance on how I'm possibly using these functions incorrectly would be greatly appreciated.|
|2019-01-22 21:01||galbramc||New Issue|
|2019-01-22 21:01||galbramc||Assigned To||=> msv|
|2019-01-22 21:01||galbramc||File Added: Fuse_Shell.tgz|
|2019-01-23 17:44||galbramc||Note Added: 0081868|
|2019-01-23 19:12||galbramc||File Added: Fuse_Shell2.tgz|
|2019-01-23 19:13||galbramc||Note Added: 0081869|
|2019-10-11 22:31||galbramc||Assigned To||msv => abv|
|2019-10-11 22:31||galbramc||Note Added: 0088057|
|2019-12-17 13:50||kgv||Summary||BRepBuilderAPI_Sewing fails after BRepAlgoAPI_Fuse => Modeling Algorithms - BRepBuilderAPI_Sewing fails after BRepAlgoAPI_Fuse|
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