Don't expand convex hull if offset < 0

We can only do Minkowski sums now, no subtractions. So if there needs to be a subtraction, don't do anything for now. Previously it would expand with abs(hull_offset), so a negative value would cause expansion rather than contraction.

Contributes to issue #2042.
This commit is contained in:
Ghostkeeper 2017-10-02 09:49:43 +02:00
parent 9f8691feef
commit 812873af15
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@ -266,7 +266,7 @@ class ConvexHullDecorator(SceneNodeDecorator):
if self._getSettingProperty("mold_enabled", "value"):
mold_width = self._getSettingProperty("mold_width", "value")
hull_offset = horizontal_expansion + mold_width
if hull_offset != 0:
if hull_offset > 0: #TODO: Implement Minkowski subtraction for if the offset < 0.
expansion_polygon = Polygon(numpy.array([
[-hull_offset, -hull_offset],
[-hull_offset, hull_offset],