0023378: BRepAlgoAPI_Cut returns wrong result

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Date Submitted

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0023378

Community

[OCCT] OCCT:Modeling Algorithms

public

2012-08-13 18:26

2012-08-13 18:28

Reporter

Timo

Assigned To

jgv

Priority

normal

Severity

minor

Reproducibility

always

Status

new

Resolution

open

Platform

OS Version

Product Version

[OCCT] 6.5.3

Target Version

Fixed in Version

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.

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Attached Files

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

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

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

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Issue History
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