diff options
Diffstat (limited to 'lib/extensions')
| -rw-r--r-- | lib/extensions/convert_to_satin.py | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/lib/extensions/convert_to_satin.py b/lib/extensions/convert_to_satin.py index 93850789..5512a095 100644 --- a/lib/extensions/convert_to_satin.py +++ b/lib/extensions/convert_to_satin.py @@ -129,11 +129,16 @@ class ConvertToSatin(InkstitchExtension): if Point(*path[0]).distance(Point(*path[-1])) < 1: raise SelfIntersectionError() + # Shapely is supposed to return right sided offsets in reversed direction, which it does, except for macOS. + # To avoid direction checking, we are going to rely on left side offsets only. + # Therefore we need to reverse the original path. + reversed_path = shgeo.LineString(reversed(path)) path = shgeo.LineString(path) + distance = stroke_width / 2.0 try: - left_rail = path.parallel_offset(stroke_width / 2.0, 'left', **style_args) - right_rail = path.parallel_offset(stroke_width / 2.0, 'right', **style_args) + left_rail = path.parallel_offset(distance, 'left', **style_args) + right_rail = reversed_path.parallel_offset(distance, 'left', **style_args) except ValueError: # TODO: fix this error automatically # Error reference: https://github.com/inkstitch/inkstitch/issues/964 @@ -149,7 +154,6 @@ class ConvertToSatin(InkstitchExtension): # https://shapely.readthedocs.io/en/latest/manual.html#object.parallel_offset raise SelfIntersectionError() - # for whatever reason, shapely returns a right-side offset's coordinates in reverse left_rail = list(left_rail.coords) right_rail = list(reversed(right_rail.coords)) |