0002929: GeomHatch doesn't draw lines from an absolute position

ID	Project	Category	View Status	Date Submitted	Last Update

0002929	TechDraw	Bug	public	2017-02-27 21:23	2017-05-10 21:03

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

Summary	0002929: GeomHatch doesn't draw lines from an absolute position
Description	I have tried to write some patterns with dashed lines. However it seems TechDraw calculates the pattern from the border of the face instead of a fixed position, thus messing up the alignment of the individual lines if the border is not a straight line. See the attached screen shot for an example. The rectangle on the left side is ok, but in the circle on the right side the pattern is messed up.
Tags	hatch

FreeCAD Information

lambda 2017-02-27 21:23 reporter	hatch-1.png (11,406 bytes) hatch-1.png (11,406 bytes)

Kunda1 2017-02-28 01:00 administrator ~0008470	Please post your Help > About FreeCAD > Copy to clipboard Did you happen to ask on the forums before you posted to the tracker?

lambda 2017-02-28 11:52 reporter ~0008472	No, I didn't post about this issue on the forum. Looks like a straight forward problem, not sure what I'd ask. OS: Debian GNU/Linux 8.0 (jessie) Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.17.10237 (Git) Build type: Unknown Branch: master Hash: 64912a59cc7f11c6263c8cb47fc713da773aa9d1 Python version: 2.7.9 Qt version: 4.8.6 Coin version: 4.0.0a OCC version: 6.7.0

Kunda1 2017-02-28 19:47 administrator ~0008478	@wandererfan when you get a moment can you weigh in on this?

wandererfan 2017-03-04 16:52 manager ~0008541	@lambda is correct. The lines start out based on a fixed point, then get shifted to the face boundary in the conversion to Qt QGraphicsPathItems on the Gui side. There is a related problem with the deltaX part of the PAT specification too. No ETA on a fix yet, sorry.

wandererfan 2017-05-10 17:53 manager ~0008941	should be fixed by commit 7628089.

Kunda1 2017-05-10 18:23 administrator ~0008942	FreeCAD master 76280891

Kunda1 2017-05-10 21:03 administrator ~0008947	Thanks wandererfan! @lambda please test and reopen if issue persists.

FreeCAD: master 76280891 2017-03-28 01:10:33 WandererFan Committer: wmayer Details Diff	DrawGeomHatch improvements -draw & align dash patterns correctly on all QPainters using QGPathItem -Allow patterns to start with space -ensure horiz & vert lines pass through pattern origin -Scalable complex patterns	Affected Issues 0002929, 0003015
	mod - src/Mod/TechDraw/App/DrawGeomHatch.cpp	Diff File
	mod - src/Mod/TechDraw/App/HatchLine.cpp	Diff File
	mod - src/Mod/TechDraw/App/HatchLine.h	Diff File
	mod - src/Mod/TechDraw/Gui/QGIFace.cpp	Diff File
	mod - src/Mod/TechDraw/Gui/QGIFace.h	Diff File

Date Modified	Username	Field	Change
2017-02-27 21:23	lambda	New Issue
2017-02-27 21:23	lambda	File Added: hatch-1.png
2017-02-28 01:00	Kunda1	Note Added: 0008470
2017-02-28 11:52	lambda	Note Added: 0008472
2017-02-28 19:47	Kunda1	Note Added: 0008478
2017-02-28 20:12	Kunda1	Summary	GeomHatch doesn't draw lines from an absolute possition => GeomHatch doesn't draw lines from an absolute position
2017-03-04 16:52	wandererfan	Assigned To	=> wandererfan
2017-03-04 16:52	wandererfan	Status	new => confirmed
2017-03-04 16:52	wandererfan	Target Version	=> 0.17
2017-03-04 16:52	wandererfan	Note Added: 0008541
2017-05-09 19:29	Kunda1	Relationship added	related to 0003015
2017-05-10 01:32	Kunda1	Tag Attached: hatch
2017-05-10 17:53	wandererfan	Note Added: 0008941
2017-05-10 18:23	Kunda1	Note Added: 0008942
2017-05-10 18:23	Kunda1	Changeset attached	=> FreeCAD master 76280891
2017-05-10 18:24	Kunda1	Status	confirmed => resolved
2017-05-10 18:24	Kunda1	Resolution	open => fixed
2017-05-10 18:24	Kunda1	Fixed in Version	=> 0.17
2017-05-10 21:03	Kunda1	Status	resolved => closed
2017-05-10 21:03	Kunda1	Note Added: 0008947