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Sketcher: fix reversed geometry and rotated arcs

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Fixes a bug where an arc, ellipse, or arc-of-ellipse, being reversed in
XY plane, behaved badly in sketcher (see forum thread "Sketch: how to
handle reversed external arcs?"
http://forum.freecadweb.org/viewtopic.php?f=10&t=9130 ).
Also fixes a problem with rotated arcs (see forum thread "Rotating Arc
in Sketcher"
http://forum.freecadweb.org/viewtopic.php?f=22&t=9145#p74262 ).

This is done by adding an emulation flag to a few methods in
Part::GeomXXX, which makes the shape to pretend being non-reversed
(CCW). This causes endpoints of reversed arcs of circles lineked as
external geometry to swap, causing broken sketches sometimes.
This commit is contained in:
DeepSOIC
2015-01-25 00:24:06 +03:00
committed by wmayer
parent 3d26960f4a
commit 1bbc764e9e
11 changed files with 451 additions and 172 deletions
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src/Mod/Sketcher/App/planegcs/GCS.h
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@@ -157,7 +157,6 @@ namespace GCS
int addConstraintTangent(Circle &c, Arc &a, int tagId=0);
int addConstraintCircleRadius(Circle &c, double *radius, int tagId=0);
int addConstraintEllipseAngleXU(Ellipse &e, double *angle, int tagId=0);
int addConstraintArcRadius(Arc &a, double *radius, int tagId=0);
int addConstraintEqualLength(Line &l1, Line &l2, double *length, int tagId=0);
int addConstraintEqualRadius(Circle &c1, Circle &c2, int tagId=0);