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IDProjectCategoryView StatusLast Update
0004279SketcherBugpublic2020-03-04 07:33
Reporterjurgen_g Assigned To 
PrioritynormalSeverityminorReproducibilityunable to reproduce
Status newResolutionopen 
Product Version0.19 
Summary0004279: A sketch appears to be fully constrained but sometimes a constraint flips
DescriptionIn occasions I notice how a chain of horizontal or vertical constraints appear to be fully constrained. But after changing parametric values (spreadsheed), suddenly a point flips from left of the previous point to right of it. All constraints are still met (all the distances are correct) but one constraint changed direction/orientation.
Maybe a horizontal/vertical constraint could also add a "fixed orientation" check-mark.

Workarounds are available, making this non-critical.

My basic frustration/bug is that a sketch appears to be fully constrained (green lines) while in reality it isn't. It's not possible to slide any element of the sketch to a different position but different positions are possible to reach this point.
Steps To ReproduceSimplified example of the sketch (screenshot) are attached. Notice that I could not trigger the flip to happen predictably so this example is a mock-up.
TagsNo tags attached.
FreeCAD InformationOS: Ubuntu 19.10 (ubuntu:GNOME/ubuntu)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.
Build type: Release
Python version: 3.7.5
Qt version: 5.12.4
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/United Kingdom (en_GB)



2020-03-04 07:33


Issue History

Date Modified Username Field Change
2020-03-04 07:33 jurgen_g New Issue
2020-03-04 07:33 jurgen_g File Added: Screenshot from 2020-03-03 08-21-31.png
2020-03-04 07:33 jurgen_g File Added: Screenshot from 2020-03-03 08-23-02.png