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IDProjectCategoryView StatusDate SubmittedLast Update
0028279Community[OCCT] OCCT:Modeling Algorithmspublic2016-12-24 12:582017-12-05 16:59
ReporterRoman Lygin 
Assigned Tomsv 
PlatformOSOS Version
Product Version[OCCT] 7.1.0 
Target Version[OCCT] 7.4.0*Fixed in Version 
Summary0028279: Greater oscillations and higher degree of resulting B-Spline in cylinder-cylinder intersections in 7.1.0
DescriptionIn 7.1.0 the surface-surface intersection algorithm produces resulting B-Spline curve which is somewhat greater distorted and has higher degree comparing to 7.0.
See screenshots.

This can be a consequence of the fix of 0023178.

It is impossible to claim the result is worse than in 7.0.0 (i.e. a regression) as there can be other factors to be taken into account (greater number of sampling points in the marching algorithm, etc). So this is rather a FYI for the OCC team to double-check as needed.
Steps To ReproduceIn both 7.0 and 7.1:
intersect r s1 s2
and zoom the result
TagsNo tags attached.
Test case numberbugs modalg_7 bug28279
Attached Fileszip file icon (390 bytes) 2016-12-24 12:58
png file icon occ710_screenshot.png (21,453 bytes) 2016-12-24 12:58
png file icon occ700_screenshot.png (25,166 bytes) 2016-12-24 12:58

- Relationships
related to 0023178closedapn Intersection of cylinders fails to produce results 

-  Notes
mkv (tester)
2017-08-28 16:55

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

- Issue History
Date Modified Username Field Change
2016-12-24 12:58 Roman Lygin New Issue
2016-12-24 12:58 Roman Lygin Assigned To => msv
2016-12-24 12:58 Roman Lygin File Added:
2016-12-24 12:58 Roman Lygin File Added: occ710_screenshot.png
2016-12-24 12:58 Roman Lygin File Added: occ700_screenshot.png
2016-12-24 12:59 Roman Lygin Relationship added related to 0023178
2017-07-21 11:22 msv Target Version 7.2.0 => 7.3.0
2017-08-28 16:55 mkv Test case number => bugs modalg_7 bug28279
2017-08-28 16:55 mkv Note Added: 0069997
2017-12-05 16:59 msv Target Version 7.3.0 => 7.4.0*

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