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0031672Community[OCCT] OCCT:Data Exchangepublic2020-07-17 19:442020-08-26 12:10
Alexandru 
dpasukhi 
normalmajor 
newopen 
Windows10
[OCCT] 7.4.0 
 
0031672: Data Exchange, STEP reader - Surface wrongly recognized as degenerate torus
In the attached geometry, one of the surfaces is recognized as degenerated torus. The thing is: There is no torus in this simple geometry. See file attached.
No tags attached.
? 37.stp (3,959) 2020-07-17 19:44
https://tracker.dev.opencascade.org/
jpg temp.jpg (8,301) 2020-07-24 15:04
https://tracker.dev.opencascade.org/
Issue History
2020-07-17 19:44AlexandruNew Issue
2020-07-17 19:44AlexandruAssigned To => gka
2020-07-17 19:44AlexandruFile Added: 37.stp
2020-07-24 12:36kgvProduct Version => 7.4.0
2020-07-24 12:36kgvSummarySurface wrongly recognized as degenerate torus => Data Exchange, STEP reader - Surface wrongly recognized as degenerate torus
2020-07-24 12:38kgvNote Added: 0093284
2020-07-24 12:42AlexandruNote Added: 0093285
2020-07-24 13:04kgvNote Added: 0093289
2020-07-24 15:04AlexandruFile Added: temp.jpg
2020-07-24 15:05AlexandruNote Added: 0093291
2020-07-24 15:09AlexandruNote Added: 0093292
2020-08-26 12:10gkaAssigned Togka => dpasukhi

Notes
(0093284)
kgv   
2020-07-24 12:38   
I suppose that torus surface is created from the following item in STEP file:
#61=DEGENERATE_TOROIDAL_SURFACE('',#42974,0.273874678843767,9.99999999999133,.F.);
(0093285)
Alexandru   
2020-07-24 12:42   
Forgot to say: I can load the STEP without any problems in SolidWorks.
(0093289)
kgv   
2020-07-24 13:04   
> Forgot to say: I can load the STEP without any problems in SolidWorks.
If it looks different in SolidWorks - it would be helpful also attaching screenshots.
(0093291)
Alexandru   
2020-07-24 15:05   
I uploaded a screenshot of the actual geometry as section view.
(0093292)
Alexandru   
2020-07-24 15:09   
The volume a rotational symmetry axis, that's why I choosed to show it as a section view