View Issue Details

IDProjectCategoryView StatusDate SubmittedLast Update
0022759Open CASCADEOCCT:Modeling Algorithmspublic2011-10-12 11:312012-02-22 14:25
ReporterszyAssigned Tobugmaster  
PrioritynormalSeverityminor 
Status closedResolutionno change required 
PlatformWindowsOSVC++ 2005 
Product Version6.5.2 
Target Version6.5.3 
Summary0022759: Crash during shape visualization
DescriptionVisualization of the attached shape (weldt6.brep) in shading mode leads to crash of DRAWEXE.
Steps To Reproducepload DEFAULT AISV
restore weldt6.brep w6
checkshape w6 ;
## => This shape seems to be valid
## meshing is successful:
incmesh w6 0.01
## Meshing statuses: NoError
trinfo w6
##This shape contains 27781 triangles.
## 14651 nodes.
##Maximal deflection 0.018454016609149613
vinit
vsetdispmode 1
## => This application has requested the Runtime to terminate it in an unusual way.
TagsNo tags attached.
Test case numberchl 934 S3

Attached Files

Activities

szy

2011-10-12 11:31

manager  

weldt6.zip (11,619,694 bytes)

san

2011-10-31 11:38

developer   ~0018445

Dear Anton,

Could you please try to reproduce the problem and analyze the reason for it?

pdn

2012-02-07 10:52

reporter   ~0019419

Fixed in http://svn/svn/occt/branches/OCC22759
The problem was in extra splits near C0 parameters of the surface. Nwerhteless, C0 are not considered for the moment. It is proposed to process aas corresponding improvement

epa

2012-02-07 11:37

developer   ~0019423

I have no remarks on the change; please test

mkv

2012-02-16 12:12

tester   ~0019594

Dear BugMaster,
Workbench KAS:dev:mkv-22759-occt was created from SVN branch http://svn/svn/occt/branches/OCC22759
(and mkv-22759-products from trunk) and compiled on Linux and Windows platforms.
Test case for this bug is chl/934/S3, this test is OK.

There are following regressions/differences in mkv-22759-products regarding to KAS:dev:products-20120127-opt

msh 001 R1
msh 002 R1

See results in /QADisk/occttests/results/KAS/dev/mkv-22759-products_14022012/lin
See reference results in /QADisk/occttests/results/KAS/dev/products-20120203-opt_03022012/lin
See test cases in /QADisk/occttests/tests/ED
N.B. In order to launch testing case you can make use the following instructions
http://doc/doku.php?id=occt:certification

mkv

2012-02-16 12:14

tester  

S3 (2,035 bytes)   

pdn

2012-02-21 10:20

reporter  

msh001R1.gif (14,889 bytes)   

pdn

2012-02-21 10:27

reporter   ~0019689

The problem in test cases is caused by oscillating surface. Face #39 is based on Bezier surface with degenerated point. The size of degenerativity is about 0.002 (along U=1). In the degenerated area surface osccillates and normal direction changed near to surface boundary.

The problem with the shading occurs after meshing algorithm in the computation of presentation and normals. Due to surface oscillation, bormal in one of triangle point differs from the other two poins which causes dark triangles.

Conclusion: shading reflects the problems with the surface. Please close the bug and update test case.

pdn

2012-02-21 10:27

reporter   ~0019690

Please manage bug closing

bugmaster

2012-02-21 10:45

administrator   ~0019691

Mikhail,

Please update testing case, recheck result and inform me

mkv

2012-02-21 20:22

tester   ~0019710

Dear Bugmaster,
It is not necessary to modify test cases msh/001/R1 and msh/001/R2.

Issue History

Date Modified Username Field Change
2011-10-12 11:31 szy New Issue
2011-10-12 11:31 szy Assigned To => san
2011-10-12 11:31 szy File Added: weldt6.zip
2011-10-31 11:38 san Note Added: 0018445
2011-10-31 11:38 san Assigned To san => apl
2011-10-31 11:38 san Status new => assigned
2011-11-07 11:31 san Assigned To apl => dln
2012-01-31 13:38 dln Assigned To dln => pdn
2012-02-07 10:52 pdn Note Added: 0019419
2012-02-07 10:52 pdn Status assigned => resolved
2012-02-07 10:53 pdn Assigned To pdn => epa
2012-02-07 11:37 epa Note Added: 0019423
2012-02-07 11:37 epa Assigned To epa => pdn
2012-02-07 11:37 epa Status resolved => reviewed
2012-02-14 13:36 mkv Assigned To pdn => mkv
2012-02-15 19:21 mkv Test case number => chl 934 S3
2012-02-16 12:12 mkv Note Added: 0019594
2012-02-16 12:14 mkv File Added: S3
2012-02-16 12:14 mkv Assigned To mkv => pdn
2012-02-16 12:14 mkv Status reviewed => assigned
2012-02-21 10:20 pdn File Added: msh001R1.gif
2012-02-21 10:21 pdn Category OCCT:Visualization => OCCT:Modeling Algorithms
2012-02-21 10:27 pdn Note Added: 0019689
2012-02-21 10:27 pdn Note Added: 0019690
2012-02-21 10:27 pdn Assigned To pdn => abv
2012-02-21 10:27 pdn Status assigned => feedback
2012-02-21 10:35 abv Assigned To abv => bugmaster
2012-02-21 10:45 bugmaster Note Added: 0019691
2012-02-21 10:45 bugmaster Assigned To bugmaster => mkv
2012-02-21 20:22 mkv Note Added: 0019710
2012-02-21 20:22 mkv Assigned To mkv => bugmaster
2012-02-21 20:22 mkv Status feedback => tested
2012-02-22 14:25 bugmaster Status tested => closed
2012-02-22 14:25 bugmaster Resolution open => no change required