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IDProjectCategoryView StatusLast Update
0004788PartDesignBugpublic2021-11-14 04:17
Reportergarya Assigned To 
PrioritynormalSeverityminorReproducibilityalways
Status newResolutionopen 
PlatformPCOSFreeBSDOS Version11.4-RELEASE
Product Version0.20 
Summary0004788: Polar pattern of loft up to arc surface fails
DescriptionIf a loft is done from a square pillar resting on a ring, the resulting loft cannot be replicated in a polar array.

Forum thread: https://forum.freecadweb.org/viewtopic.php?f=3&t=63689

Several example files are posted in forum thread; the simplest is PolarPatrn_4.


Steps To ReproduceLoad PolarPatrn_4
Select Proto_WindingRib
Click PolarPattern
  Result: Two posts are visible, 180 degrees apart
          The original post has the additive loft; the patterned one does not (ok so far)
Click Add Feature
  Result: The added post is removed (still ok)
Click on the AdditiveLoft
  Result: AdditiveLoft is added to the PolarPattern parameters list in the dialog (correct)
          The original additive loft disappears and no lofts are visible on either post (incorrect)
Additional InformationSee the forum thread for other manifestations of this bug and attempts to work around.
It was suggested this is a problem with OpenCascade.
TagsLoft, Part Design, PolarPattern
FreeCAD InformationOS: FreeBSD 11.4-RELEASE-p6 (XFCE/xfce)
Word size of FreeCAD: 64-bit
Version: 0.20.master (Built from source 2021-11-01)
Build type: Release
Python version: 3.7.9
Qt version: 5.15.2
Coin version: 4.0.0
OCC version: 7.5.0
Locale: C/Default (C)

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Issue History

Date Modified Username Field Change
2021-11-14 04:17 garya New Issue
2021-11-14 04:17 garya Tag Attached: Loft
2021-11-14 04:17 garya Tag Attached: Part Design
2021-11-14 04:17 garya Tag Attached: PolarPattern