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IDProjectCategoryView StatusDate SubmittedLast Update
0027711Open CASCADE[OCCT] OCCT:Modeling Algorithmspublic2016-07-26 11:582019-09-04 12:18
Reporterssv 
Assigned Tomsv 
PrioritynormalSeverityminor 
StatusassignedResolutionopen 
Platformx64 MSVC2013OSWindowsOS Version10
Product Version 
Target Version[OCCT] 7.5.0*Fixed in Version 
Summary0027711: Modeling Algorithms - Blend-on-blend corrupts the shape
DescriptionThis simple scenario was used to prepare a sample blend chain. The problem arises on last blend operation (for edge res_27). If the radius of the last blend (0.2) is increased (e.g. to 0.3), then the blend cannot be constructed at all.
Steps To Reproducepload MODELING
box a -1.5 -1.5 0 3 3 3
box b -3 -3 -3 6 6 3
bfuse r a b
explode r e
blend res r 0.5 r_12 0.5 r_11
explode res e
blend res res 0.5 res_11
explode res e
blend res res 0.35 res_4 0.25 res_15 0.2 res_27
checkshape res
TagsNo tags attached.
Test case numberbugs modalg_7 bug27711
Attached Filespng file icon blend_01.png (24,028 bytes) 2017-08-18 09:43
png file icon blend_02.png (21,942 bytes) 2017-08-18 09:44
png file icon blend_03.png (27,067 bytes) 2017-08-18 09:44
png file icon blend_04.png (5,154 bytes) 2017-08-18 09:44

- Relationships
related to 0026907assignedjgv ChFi3d_Builder algorithm uses old Boolean operations: wrong processing of shapes with seam and degenerated edges 
related to 0030435verifiedifv Improving performance of Approx_ComputeCLine 

-  Notes
(0069560)
ssv (developer)
2017-08-18 09:46

 Alexey, I have reproduced the issue and noticed that the previously attached screenshot was not relevant. Please, have a look at newly attached pictures. They correspond to the reported scenario and illustrate the problem.
(0069561)
ssv (developer)
2017-08-18 10:33

 Fillets seem to work in a different way depending on platform...

Steps to reproduce have been modified to make the results reproducible between my workstation and QA team. The following command:

blend res res 0.5 res_7 0.5 res_11

was changed with:

blend res res 0.5 res_11
(0069564)
apv (tester)
2017-08-18 11:09

 Problem described in issue is reproduced on current state of OCCT.
(0082090)
msv (developer)
2019-02-08 16:43

 The test case bugs/modalg_7/bug27711_3 has been fixed by the fix for 0030435.

- Issue History
Date Modified Username Field Change
2016-07-26 11:58 ssv New Issue
2016-07-26 11:58 ssv Assigned To => msv
2016-07-26 13:53 ssv File Added: fillet_onshape.png
2016-07-26 13:53 ssv Note Added: 0056225
2016-10-28 17:03 msv Target Version 7.1.0 => 7.2.0
2017-07-24 09:32 msv Target Version 7.2.0 => 7.3.0
2017-08-18 09:39 ssv Note Deleted: 0056225
2017-08-18 09:39 ssv File Deleted: fillet_onshape.png
2017-08-18 09:43 ssv File Added: blend_01.png
2017-08-18 09:44 ssv File Added: blend_02.png
2017-08-18 09:44 ssv File Added: blend_03.png
2017-08-18 09:44 ssv File Added: blend_04.png
2017-08-18 09:46 ssv Note Added: 0069560
2017-08-18 09:46 ssv Assigned To msv => apv
2017-08-18 09:46 ssv Status new => feedback
2017-08-18 10:33 ssv Note Added: 0069561
2017-08-18 10:33 ssv Steps to Reproduce Updated View Revisions
2017-08-18 10:35 ssv OS => Windows
2017-08-18 10:35 ssv OS Version => 2010
2017-08-18 10:35 ssv Platform => x64 MSVC2013
2017-08-18 10:35 ssv OS Version 2010 => 10
2017-08-18 11:09 apv Test case number => bugs modalg_7 bug27711
2017-08-18 11:09 apv Note Added: 0069564
2017-08-18 11:09 apv Assigned To apv => msv
2017-08-18 11:09 apv Status feedback => assigned
2017-12-05 17:08 msv Target Version 7.3.0 => 7.4.0
2018-04-28 16:24 jgv Relationship added related to 0026907
2019-02-08 16:43 msv Note Added: 0082090
2019-02-08 16:44 msv Relationship added related to 0030435
2019-08-12 18:35 msv Target Version 7.4.0 => 7.5.0*
2019-09-04 12:18 kgv Summary Blend-on-blend corrupts the shape => Modeling Algorithms - Blend-on-blend corrupts the shape

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