0002140: Intersection operation does not work

ID	Project	Category	View Status	Date Submitted	Last Update

0002140	FreeCAD	Bug	public	2015-06-01 20:20	2015-12-15 13:18

Reporter	stephane.magnenat	Assigned To	ickby
Priority	normal	Severity	major	Reproducibility	always
Status	closed	Resolution	fixed
Product Version	0.15
Fixed in Version	0.16

Summary	0002140: Intersection operation does not work
Description	Intersecting two objects does not produce the geometrically-correct result.
Steps To Reproduce	Load the attached file, use the intersection tool, see the result.
Additional Information	These objects were created by loading SVG and extruding them, maybe this leads to broken objects.
Tags	No tags attached.

FreeCAD Information

stephane.magnenat 2015-06-01 20:20 reporter	~~intersection-bug.fcstd~~ (Attachment missing)

ickby 2015-06-02 05:53 developer ~0006179	The imported geometry fa-path is broken as it does have a non-closed outer wire. This makes the face non-valid. Check this via python console via >>> obj = App.ActiveDocument.getObjectsByLabel('fa-path')[0] >>> obj.Shape.isValid() False >>> obj.Shape.OuterWire.isClosed() False This makes the extruded solid invalid and lead to the failed boolean operation. Please fix the imported path. Note that FreeCAD uses 1.e-7 as default tolerance for coincidence detection. If your svg works with lower precision consider increasing the edge and vertex tolerance of the wire before making a face from it. I'm closing this issue as a boolean operation has undefined behaviour on broken input data, hence this is not a bug.

Date Modified	Username	Field	Change
2015-06-01 20:20	stephane.magnenat	New Issue
2015-06-01 20:20	stephane.magnenat	File Added: intersection-bug.fcstd
2015-06-02 05:53	ickby	Note Added: 0006179
2015-06-02 05:53	ickby	Status	new => closed
2015-06-02 05:53	ickby	Assigned To	=> ickby
2015-06-02 05:53	ickby	Resolution	open => fixed
2015-12-15 13:18	yorik	Fixed in Version	=> 0.16