Wrong constraints after Carbon Copy from another body

[kisolre]

In the supplied file when Carbon Copying sketch from another body in construction mode some constraints are marked as redundant. Carbon copying the same sketch in normal mode shows everything as ok. After copying in construction mode and manualy removing that constraints sketch shows as fully constrained but actually is not.
To reproduce:
Open the file.
Create new body.
Create new sketch.
Toggle construction mode On.
Make sure Auto Remove Redundants is Off
Carbon Copy "GalaxyS5Body.PulseSensor.Sketch005" - constraints 21,24 are showed as redundant.
Undo
Toggle construction mode Off.
Carbon Copy "GalaxyS5Body.PulseSensor.Sketch005" - no redundant constraints.

CarbonCopyConstruction.JPG (133.09 KiB) Viewed 1181 times

Code: Select all

OS: Windows 8.1
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.16267 (Git)
Build type: Release
Branch: master
Hash: ddb335cfe057336f1958d68126bb0471328d735c
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Bulgarian/Bulgaria (bg_BG)

Other versions tested:

Code: Select all

OS: Windows 8.1
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.15816 (Git)
Build type: Release
Branch: master
Hash: 7ee0e4d43909ec688299b8498b240cccf8362c47
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Bulgarian/Bulgaria (bg_BG)

Shows 2 redundants

Code: Select all

OS: Windows 8.1
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.13541 (Git)
Build type: Release
Branch: releases/FreeCAD-0-17
Hash: 9948ee4f1570df9216862a79705afb367b2c6ffb
Python version: 2.7.14
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.2.0
Locale: Bulgarian/Bulgaria (bg_BG)

shows only one redundant - 24

[chrisb]

We have seen all kinds of weird things happen, if you continue to work on a Sketch while the solver shows issues. It takes some of the freedoms a user has - e.g. to add another useful constraint before removing a redundancy - but it might be sensible to forbid any further action which adds new stuff to such a sketch or using it.

[kisolre]

We have seen all kinds of weird things happen, if you continue to work on a Sketch while the solver shows issues. It takes some of the freedoms a user has - e.g. to add another useful constraint before removing a redundancy - but it might be sensible to forbid any further action which adds new stuff to such a sketch or using it.

This happens with blank sketch - so no possible issues. And there is a difference between a normal copy and construction copy - both with emptry sketch as a start.

[chrisb]

I currently have a very bad internet connection, but finally I could download the file.

I can confirm the behaviour. I have tried to reproduce the situation with another sketch containing only a construction line and a regular one. That did not show the issue. So I upload here for ease of test a simplified file, which contains only the suspicious sketch showing the problem. It might be worth a tracker entry.

[kisolre]

issue #3926

[abdullah]

In the supplied file when Carbon Copying sketch from another body in construction mode some constraints are marked as redundant. Carbon copying the same sketch in normal mode shows everything as ok.

Thanks! This kind of analysis is priceless.

Once I read it works in normal mode and does not in construction mode, the problem being redundants being shown, I immediately knew which line to change. You made a very cumbersome debugging taking hours into a 5 minutes fix

[kisolre]

I try