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IDProjectCategoryView StatusDate SubmittedLast Update
0029121Open CASCADE[OCCT] OCCT:Data Exchangepublic2017-09-18 14:252017-10-19 15:23
Reporternbv 
Assigned Togka 
PrioritynormalSeverityminor 
StatusnewResolutionopen 
PlatformOSOS Version
Product Version 
Target Version[OCCT] 7.4.0*Fixed in Version 
Summary0029121: Iges-reader reads invalid shape
DescriptionTest de iges_1 R8

ffirst.bin attached file contains the face read before ShapeFix_Shape calling.
Result shape (after fixshape) is res_1.

Indeed, both shapes are invalid (at least, contain not-closed oriented - only FORWARD/REVERSED edges - wires).

Finally, BRepTools_WireExplorer works incorrectly with the read face. The face res_1_364 contains 14 edges. But BRepTools_WireExplorer finds 6 ones only.
Steps To Reproducebinrestore ffirst.bin

test de iges_1 R8
explode res_1 f
don res_1_364
fit

vori res_1_364
# Maybe, some edges must be marked as INTERNAL or must not be read. However, we have only oriented edges.

nbshapes res_1_364
# EDGE : 14

explode res_1_364 w
# res_1_364_1 res_1_364_2

wexplo res_1_364_1 res_1_364
set n1 [llength [directory WEDGE_*]]

# Remove all variables "WEDGE_*"
foreach x [directory WEDGE_*] { unset $x }

wexplo res_1_364_2 res_1_364
set n2 [llength [directory WEDGE_*]]

puts [expr $n1+$n2]
# 6
Additional information
and documentation updates
IR-2017-09-07
TagsNo tags attached.
Test case number
Attached Files? file icon ffirst.bin (6,941 bytes) 2017-09-18 14:26

- Relationships
related to 0028674assignednbv BRepTools_WireExplorer works unstable and does not return several edges 
child of 0029133closedbugmaster Unstable test cases 

-  Notes
(0070635)
nbv (developer)
2017-09-18 14:28

This problem has been detected while fixing the issue #28211.

- Issue History
Date Modified Username Field Change
2017-09-18 14:25 nbv New Issue
2017-09-18 14:25 nbv Assigned To => gka
2017-09-18 14:26 nbv File Added: ffirst.bin
2017-09-18 14:28 nbv Note Added: 0070635
2017-09-18 14:28 nbv Additional Information Updated View Revisions
2017-10-13 11:03 nbv Relationship added related to 0028674
2017-10-19 15:23 nbv Relationship added child of 0029133


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