0002994: Validate Sketch's missing coincidence tool finds false positives - FreeCAD Tracker

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ID	Project	Category	View Status	Date Submitted	Last Update

0002994	Sketcher	Bug	public	2017-04-01 16:41	2017-08-13 15:34

Reporter	normandc	Assigned To	wmayer
Priority	normal	Severity	minor	Reproducibility	always
Status	closed	Resolution	fixed
Product Version	0.17
Target Version	0.17	Fixed in Version	0.17

Summary	0002994: Validate Sketch's missing coincidence tool finds false positives
Description	The "missing coincidences" utility from the Sketch --> Validate sketch tool finds false missing coincidences when point-to-point tangent and perpendicular constraints are used. If the user clicks the "Fix" button to add the missing constraints, the sketch becomes over-constrained. Point-to-point tangent and perpendicular constraints are recommended use, and it is how the Sketcher Polyline automatically applies constraints between segments. Therefore this is clearly a bug in the Validate sketch tool which brings confusion to end users, and it should be addressed.
Steps To Reproduce	Create a new document, switch to the Sketcher workbench Create a new sketch Start the Polyline tool After creating the first line segment, hit the M key 3 times to toggle to the tangent arc mode Click in the 3D view to create the tangent arc Right-click to terminate the Polyline tool Exit the sketch Go to Sketch --> Validate sketch... Under Missing coincidences, click on "Find" A dialog reports 1 missing coincidence constraint found Click on "Fix" In the tree, the Sketch icon now has an exclamation point Edit the sketch, the solver messages box reports "Sketch contains redundant constraints" and instructs to remove the coincident constraint added by the Validate sketch utility.
Additional Information	OS: Ubuntu 16.04.2 LTS Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.17.10665 (Git) Build type: None Branch: master Hash: 47847513a85ff6615774ef628230f79e37471daf Python version: 2.7.12 Qt version: 4.8.7 Coin version: 4.0.0a OCC version: 7.1.0
Tags	Solver

FreeCAD Information

Kunda1 2017-04-25 12:29 administrator ~0008752	Fixed in c:FreeCAD:7463aa7efd255a9bbe8464d3114c5a4b4a96734d: by wmayer. Bugtracker note: attach commit to ticket and close

Kunda1 2017-08-13 15:33 administrator ~0009907	https://github.com/FreeCAD/FreeCAD/commit/7463aa7efd255a9bbe8464d3114c5a4b4a96734d

Date Modified	Username	Field	Change
2017-04-01 16:41	normandc	New Issue
2017-04-25 12:29	Kunda1	Assigned To	=> wmayer
2017-04-25 12:29	Kunda1	Status	new => resolved
2017-04-25 12:29	Kunda1	Resolution	open => fixed
2017-04-25 12:29	Kunda1	Fixed in Version	=> 0.17
2017-04-25 12:29	Kunda1	Note Added: 0008752
2017-05-12 12:39	Kunda1	Tag Attached: Solver
2017-08-13 15:33	Kunda1	Note Added: 0009907
2017-08-13 15:34	Kunda1	Status	resolved => closed