View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0003299||Sketcher||Feature||public||2018-01-03 18:32||2018-01-27 16:12|
|Target Version||0.18||Fixed in Version||0.17|
|Summary||0003299: Sketcher should check redundant coincidences used with tangent constraints|
|Description||There is a corresponding issue for the ValidateSketch tool: #3298.|
The tangent constraint is often used together with a coincidence constraint instead of applying it to the endpoints instead.
This often leads to problems in subsequent steps.
[quote=NormandC]So maybe something could be done about that in the Sketcher, but I don't know what, and how complicated it would be.
Make the solver detect these conflicts and warn the user about it?
Make the solver detect these conflicts and transparently replace the dual constraint with the proper point-on-point tangent constraint?
I would prefer the first solution, doing something automatic might prohibit the possibility to have the erroneous situation as an intermediate step.
|Steps To Reproduce||- Create two independent lines|
- apply tangent constraint on the lines (not the endpoints!)
- apply coincidence to the endpoints
Steps two and three can be interchanged
|Additional Information||OS: Mac OS X|
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.12915 (Git)
Build type: Release
Branch: (HEAD detached at 90a71f3)
Python version: 2.7.14
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.1.0
Locale: German/Germany (de_DE)
|Tags||No tags attached.|
tangentWrongUsage.FCStd (3,529 bytes)
Note to self:
- It is not feasible to modify the tangency constraints at solver level because once changed, they will be changed in at Sketcher level because they "travel" by pointer and are updated after solver execution. So it is not (clearly and cleanly) possible to decouple both.
- The path must be at Sketcher level, not at solver (or sketch.cpp) level.
|2018-01-03 18:32||chrisb||New Issue|
|2018-01-03 18:32||chrisb||Status||new => assigned|
|2018-01-03 18:32||chrisb||Assigned To||=> abdullah|
|2018-01-03 18:32||chrisb||File Added: tangentWrongUsage.FCStd|
|2018-01-03 20:34||Kunda1||Description Updated||View Revisions|
|2018-01-03 20:34||Kunda1||Relationship added||related to 0003298|
|2018-01-24 17:11||abdullah||Note Added: 0010844|
|2018-01-25 16:15||abdullah||Note Added: 0010850|
|2018-01-27 16:12||wmayer||Status||assigned => closed|
|2018-01-27 16:12||wmayer||Resolution||open => fixed|
|2018-01-27 16:12||wmayer||Fixed in Version||=> 0.17|
|2018-01-27 16:12||wmayer||Note Added: 0010877|