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0027711Open CASCADE[OCCT] OCCT:Modeling Algorithmspublic2016-07-26 11:582019-02-08 16:44
ssv 
msv 
normalminor 
assignedopen 
x64 MSVC2013Windows10
 
[OCCT] 7.4.0* 
bugs modalg_7 bug27711
0027711: Blend-on-blend corrupts the shape
This 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.
pload 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
No tags attached.
related to 0026907assigned jgv ChFi3d_Builder algorithm uses old Boolean operations: wrong processing of shapes with seam and degenerated edges 
related to 0030435verified ifv Improving performance of Approx_ComputeCLine 
png blend_01.png (24,028) 2017-08-18 09:43
https://tracker.dev.opencascade.org/
png blend_02.png (21,942) 2017-08-18 09:44
https://tracker.dev.opencascade.org/
png blend_03.png (27,067) 2017-08-18 09:44
https://tracker.dev.opencascade.org/
png blend_04.png (5,154) 2017-08-18 09:44
https://tracker.dev.opencascade.org/
Issue History
2016-07-26 11:58ssvNew Issue
2016-07-26 11:58ssvAssigned To => msv
2016-07-26 13:53ssvFile Added: fillet_onshape.png
2016-07-26 13:53ssvNote Added: 0056225
2016-10-28 17:03msvTarget Version7.1.0 => 7.2.0
2017-07-24 09:32msvTarget Version7.2.0 => 7.3.0
2017-08-18 09:39ssvNote Deleted: 0056225
2017-08-18 09:39ssvFile Deleted: fillet_onshape.png
2017-08-18 09:43ssvFile Added: blend_01.png
2017-08-18 09:44ssvFile Added: blend_02.png
2017-08-18 09:44ssvFile Added: blend_03.png
2017-08-18 09:44ssvFile Added: blend_04.png
2017-08-18 09:46ssvNote Added: 0069560
2017-08-18 09:46ssvAssigned Tomsv => apv
2017-08-18 09:46ssvStatusnew => feedback
2017-08-18 10:33ssvNote Added: 0069561
2017-08-18 10:33ssvSteps to Reproduce Updatedbug_revision_view_page.php?rev_id=17343#r17343
2017-08-18 10:35ssvOS => Windows
2017-08-18 10:35ssvOS Version => 2010
2017-08-18 10:35ssvPlatform => x64 MSVC2013
2017-08-18 10:35ssvOS Version2010 => 10
2017-08-18 11:09apvTest case number => bugs modalg_7 bug27711
2017-08-18 11:09apvNote Added: 0069564
2017-08-18 11:09apvAssigned Toapv => msv
2017-08-18 11:09apvStatusfeedback => assigned
2017-12-05 17:08msvTarget Version7.3.0 => 7.4.0*
2018-04-28 16:24jgvRelationship addedrelated to 0026907
2019-02-08 16:43msvNote Added: 0082090
2019-02-08 16:44msvRelationship addedrelated to 0030435

Notes
(0069560)
ssv   
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   
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   
2017-08-18 11:09   
Problem described in issue is reproduced on current state of OCCT.
(0082090)
msv   
2019-02-08 16:43   
The test case bugs/modalg_7/bug27711_3 has been fixed by the fix for 0030435.