View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0001858||FreeCAD||Bug||public||2014-12-16 21:37||2021-02-06 06:49|
|Summary||0001858: Loft tool incorrect result with rotated ellipses (Upstream OCC bug)|
|Description||Loft tool gives unexpected result when using identical ellipses rotated. One end edge as expected, but other has scolloping, concave or convex dependent on two or more ellipses.|
|Tags||Bountysource Potential, bump, OCC Bug, OCC NotOnRoadmap, upstream|
reproduceable in DRAWEXE of OCCT 6.8.1-dev
reported as http://tracker.dev.opencascade.org/view.php?id=25626
||Still reproducible on OCCT 7.1 and upstream isn't on the roadmap. Requires bump.|
||@adbdullah would you be interested in bumping the upstream ticket in the hopes that it may be added to the OCC roadmap ?|
Original attachment is missing, and the attached files in the OCCT bug tracker can't be downloaded.
A loft between three ellipses rotated 90 degrees from each other appear fine in FC 0.18-dev with latest OCCT 7.3.0...
||What should be we do about this ticket then?|
||Maybe the OCCT bug tracker requires to be registered to download. Since @abdullah has an account, we could ask him to upload the files here so we could check with FreeCAD compiled with latest OCCT. From what I understand of the posted DRAWEXE script (in the upstream bug, "Steps to reproduce"), it reads from brep files that are probably included in the zip archive.|
Files are attached. I will indicate that the FC project is monitoring this ticket and whether it will be assigned to a roadmap.
loft-el1.zip (1,713 bytes)
Bugnote #0081082 added by MSV (developer) 2018-11-14 10:12
Dear abdullah, OCC has no fonds to solve this bug in the nearest future without external investment or contribution. You are welcome to propose your fix if you can.
||Unfortunately it is a too big shoe for my feet.|
Thanks, abdullah. I imported the 3 brep files into FreeCAD and created a Part Loft. I'm attaching it for future reference. The issue indeed persists with OCC 7.3.0. Ellipses are rotated only a few degrees, I had tried 90 degrees between each ellipse and that worked.
I also tried a sweep with a straight line from (0,0,0) to (0,0,20) as path; same issue.
That's a bummer on OCC's reply...
FC_issue_0001858.fcstd (13,674 bytes)
|2014-12-16 21:37||NikB||New Issue|
|2014-12-16 21:37||NikB||File Added: prop001.FCStd|
|2014-12-17 10:14||shoogen||Note Added: 0005400|
|2014-12-17 10:14||shoogen||Assigned To||=> shoogen|
|2014-12-17 10:14||shoogen||Status||new => acknowledged|
|2014-12-17 10:32||shoogen||Note Edited: 0005400|
|2014-12-17 10:32||shoogen||Severity||major => minor|
|2014-12-17 10:33||shoogen||Tag Attached: OCC Bug|
|2017-01-15 04:34||Kunda1||Tag Attached: upstream|
|2017-01-27 01:26||Kunda1||Tag Attached: bump|
|2017-08-22 11:47||Kunda1||Note Added: 0009990|
|2017-08-22 11:52||Kunda1||Tag Attached: OCC Unscheduled|
|2017-08-22 11:56||Kunda1||Tag Renamed||OCC Unscheduled => OCC NotOnRoadmap|
|2018-10-19 13:36||Kunda1||Note Added: 0012071|
|2018-11-11 06:18||normandc||Note Added: 0012173|
|2018-11-12 00:47||Kunda1||Note Added: 0012179|
|2018-11-12 02:55||normandc||Note Added: 0012180|
|2018-11-13 17:51||abdullah||File Added: loft-el1.zip|
|2018-11-13 17:51||abdullah||File Added: loft-el1.png|
|2018-11-13 17:51||abdullah||Note Added: 0012191|
|2018-11-14 19:06||abdullah||Note Added: 0012196|
|2018-11-14 19:08||abdullah||Note Added: 0012197|
|2018-11-15 01:53||normandc||File Added: FC_issue_0001858.fcstd|
|2018-11-15 01:53||normandc||Note Added: 0012198|
|2018-11-22 11:10||Kunda1||Tag Attached: potentialbounty|
|2018-12-24 12:52||Kunda1||Tag Renamed||potentialbounty => Bountysource Potential|
|2020-01-14 17:39||Kunda1||Summary||Loft tool incorrect result with rotated ellipses => Loft tool incorrect result with rotated ellipses (Upstream OCC bug)|
|2021-02-06 06:49||abdullah||Target Version||=> 0.20|