0027251: Shape becomes invalid when exported to STEP and imported back - MantisBT

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ID

Project

Category

View Status

Date Submitted

Last Update

0027251

Community

[OCCT] OCCT:Data Exchange

public

2016-03-11 13:55

2019-04-04 12:49

Reporter

Markus

Assigned To

gka

Priority

normal

Severity

minor

Status

new

Resolution

open

Platform

OS

OS Version

Product Version

[OCCT] 7.0.0

Target Version

[OCCT] 7.4.0*

Fixed in Version

Summary

0027251: Shape becomes invalid when exported to STEP and imported back

Description

Shape before export to STEP is valid, but after import becomes invalid.

Steps To Reproduce

restore cc.brep c

whatis c

checkshape c

stepwrite 0 c c.stp

stepread c.stp r *

whatis r_1

checkshape r_1

Tags

No tags attached.

Test case number

bugs step bug27251

cc.brep (479,000 bytes) 2016-03-11 13:55

Relationships

Notes
(0069728) mkv (tester) 2017-08-21 18:17	Problem described in issue is reproduced on current state of OCCT.

(0083380) Matthias (developer) 2019-04-03 12:09	Original shape is non-manifold (corners touch each other). In case the original shape is splitted into two faces, the issue doesn't occur. When importing the STEP-file, are there any repairing mechanisms trying to repair some intersections and can't handle self-intersections due to non-manifold geometry? The issue occurs also with IGES and with Parasolid (via CADExchanger).

Issue History
Date Modified	Username	Field	Change
2016-03-11 13:55	Timo	New Issue
2016-03-11 13:55	Timo	Assigned To	=> gka
2016-03-11 13:55	Timo	File Added: cc.brep
2016-10-26 11:07	gka	Target Version	7.1.0 => 7.2.0
2017-05-31 15:40	Timo	Reporter	Timo => Markus
2017-07-27 11:15	abv	Target Version	7.2.0 => 7.4.0*
2017-08-21 18:17	mkv	Test case number	=> bugs step bug27251
2017-08-21 18:17	mkv	Note Added: 0069728
2019-04-03 12:09	Matthias	Note Added: 0083380

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