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IDProjectCategoryView StatusDate SubmittedLast Update
0028119Community[OCCT] OCCT:Modeling Algorithmspublic2016-11-17 10:092018-08-03 11:30
Reporterickby 
Assigned Tomsv 
PrioritynormalSeverityminor 
StatusnewResolutionopen 
PlatformWindowsOSWindows 7OS VersionWindows 7
Product Version[OCCT] 7.0.0 
Target VersionFixed in Version 
Summary0028119: Blend fails on fused identical but shifted tori
DescriptionWhen fusing two identical and shifted tori the blending of the intersection edges fails. If the second radius of the two tori have a small difference the blend works fine.

When using draw.exe fubl on the identical tori does give a result, but it does not have blended edges. If blended manually the blend operation does not give a result.

Detected with FreeCAD0.17 and occ7.0 and reproduced with occ7.1beta draw.exe
Steps To Reproduce# works NOT with identical secondary radi
pload ALL
ptorus t1 100 10
ptorus t2 100 10
ttranslate t2 100 0 0
fubl res t1 t2 5
vinit
vdisplay res
vfit

# works with large difference in secondary radi
pload ALL
ptorus t1 100 10
ptorus t2 100 9.9
ttranslate t2 100 0 0
fubl res t1 t2 5
vinit
vdisplay res
vfit

# works NOT with small differece in secondary radi
pload ALL
ptorus t1 100 10
ptorus t2 100 9.99
ttranslate t2 100 0 0
fubl res t1 t2 5
vinit
vdisplay res
vfit
TagsNo tags attached.
Test case numberbugs modalg_7 bug28119_1, bug28119_2, bug28119_3
Attached Files

- Relationships
related to 0029910assignednbv Open CASCADE Porting to Debian80-64 : Regressions in Modeling Algorithms 

-  Notes
(0069201)
ickby (reporter)
2017-08-08 14:13

Still fails on OCC 7.2beta. Update of draw command was needed:

pload ALL
ptorus t1 100 10
ptorus t2 100 10
ttranslate t2 100 0 0
bfuseblend res t1 t2 2
# Error: Cannot find the result of BLEND-operation. The result of BOP operation will be returned.
(0069784)
mkv (tester)
2017-08-23 14:05

Problem described in issue is reproduced on current state of OCCT.

- Issue History
Date Modified Username Field Change
2016-11-17 10:09 ickby New Issue
2016-11-17 10:09 ickby Assigned To => msv
2017-08-08 14:13 ickby Note Added: 0069201
2017-08-23 14:05 mkv Test case number => bugs modalg_7 bug28119_1, bug28119_2, bug28119_3
2017-08-23 14:05 mkv Note Added: 0069784
2018-08-03 11:30 nbv Relationship added related to 0029910


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