0023378: BRepAlgoAPI_Cut returns wrong result

ID	Project	Category	View Status	Date Submitted	Last Update

0023378	Community	OCCT:Modeling Algorithms	public	2012-08-13 18:26	2018-06-29 21:19

Reporter	Markus	Assigned To	bugmaster
Priority	normal	Severity	minor
Status	closed	Resolution	fixed
Product Version	6.5.3
Target Version	7.3.0	Fixed in Version	7.3.0

Summary	0023378: BRepAlgoAPI_Cut returns wrong result
Description	The following cut operation returns a wrong result in OCCT 6.5.3: only one face is returned. In OCCT 6.5.2 the correct number of faces (2) are returned, but the bigger face is topologically not what is expected. It also cannot be displayed in shaded mode. Draw script: restore blower1.brep b explode b bop b_1 b_2 bopcut r whatis r explode r The object is cut by a cylinder. Both have only a very small volume in common. So the biggest part of the object should be returned (see Capture.PNG). In OCCT 6.5.2 a very small face and a big face (which seems to be invalid) are returned. In 6.5.3 only a very small face is returned, but the bigger face is not returned at all. The problem has been discussed on the forum: http://www.opencascade.org/org/forum/thread_23599/?forum=3 and confirmed to be reproducible.
Tags	No tags attached.

Test case number	bugs modalg_7 bug23378_1, bug23378_2

Timo 2012-08-13 18:26 developer	Capture.PNG (35,235 bytes)

Timo 2012-08-13 18:26 developer	blower1.brep (528,639 bytes)

Timo 2012-08-13 18:28 developer	Result_OCCT652.PNG (14,249 bytes)

~~abv~~ 2017-05-28 19:24 manager ~0066691	The problem of topologically incorrect results have been eliminated: the result is correct since at least OICCT 6.9.1. The result includes quite small face and has rather high tolerance (0.02), but this is due to near-tangent situation between the argument shapes. I suggest we add test case and close the issue.

git 2017-06-01 12:01 administrator ~0066962	Branch CR23378 has been created by apv. SHA-1: 0423f088b2fe2838ab465d28eafe57282468f295 Detailed log of new commits: Author: apv Date: Thu Jun 1 12:00:46 2017 +0300 0023378: BRepAlgoAPI_Cut returns wrong result // Test cases for the issue

~~apv~~ 2017-06-01 12:11 tester ~0066963	Dear BugMaster, Please integrate branch CR23378 into the occt git-repository master.

git 2017-06-02 10:45 administrator ~0066982	Branch CR23378 has been deleted by inv. SHA-1: 0423f088b2fe2838ab465d28eafe57282468f295

occt: master 3b337f77 2017-06-01 09:00:46 ~~apv~~ Committer: bugmaster Details Diff	0023378: BRepAlgoAPI_Cut returns wrong result Adding test cases only	Affected Issues 0023378
	mod - tests/bugs/grids.list	Diff File
	add - tests/bugs/modalg_7/begin	Diff File
	add - tests/bugs/modalg_7/bug23378_1	Diff File
	add - tests/bugs/modalg_7/bug23378_2	Diff File

Date Modified	Username	Field	Change
2012-08-13 18:26	Timo	New Issue
2012-08-13 18:26	Timo	Assigned To	=> jgv
2012-08-13 18:26	Timo	File Added: Capture.PNG
2012-08-13 18:26	Timo	File Added: blower1.brep
2012-08-13 18:28	Timo	File Added: Result_OCCT652.PNG
2017-05-28 19:24	~~abv~~	Note Added: 0066691
2017-05-28 19:24	~~abv~~	Assigned To	jgv => bugmaster
2017-05-28 19:24	~~abv~~	Status	new => feedback
2017-05-31 14:56	Timo	Reporter	Timo => Markus
2017-06-01 10:22	bugmaster	Assigned To	bugmaster => abv
2017-06-01 10:22	bugmaster	Assigned To	abv => apv
2017-06-01 12:01	git	Note Added: 0066962
2017-06-01 12:02	~~apv~~	Test case number	=> bugs modalg_7 bug23378_1, bug23378_2
2017-06-01 12:11	~~apv~~	Note Added: 0066963
2017-06-01 12:11	~~apv~~	Assigned To	apv => bugmaster
2017-06-01 12:11	~~apv~~	Status	feedback => tested
2017-06-02 10:28	bugmaster	Changeset attached	=> occt master 3b337f77
2017-06-02 10:28	bugmaster	Status	tested => verified
2017-06-02 10:28	bugmaster	Resolution	open => fixed
2017-06-02 10:45	git	Note Added: 0066982
2018-02-19 10:33	~~abv~~	Target Version	=> 7.4.0
2018-02-20 12:58	~~aiv~~	Target Version	7.4.0 => 7.3.0
2018-06-29 21:15	~~aiv~~	Fixed in Version	=> 7.3.0
2018-06-29 21:19	~~aiv~~	Status	verified => closed