View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0004279||Sketcher||Bug||public||2020-03-04 07:33||2020-03-04 07:33|
|Priority||normal||Severity||minor||Reproducibility||unable to reproduce|
|Summary||0004279: A sketch appears to be fully constrained but sometimes a constraint flips|
|Description||In 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 Reproduce||Simplified 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.|
|Tags||No tags attached.|
|FreeCAD Information||OS: Ubuntu 19.10 (ubuntu:GNOME/ubuntu)|
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
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)