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WIP: Attempt to fix issue with segments disappearing #39

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WIP: Attempt to fix issue with segments disappearing #39

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7 changes: 6 additions & 1 deletion Lib/booleanOperations/flatten.py
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Original file line number Diff line number Diff line change
Expand Up @@ -147,7 +147,7 @@ def __init__(self, points=None, previousOnCurve=None, willBeReversed=False):
self.scaledPreviousOnCurve = _scaleSinglePoint(previousOnCurve, scale=clipperScale)
self.used = False
self.flat = []
# if the bcps are equal to the oncurves convert the segment to a line segment.
# if the bcps are equal to the oncurves, or are aligned with them, convert the segment to a line segment.
# otherwise this causes an error when flattening.
if self.segmentType == "curve":
if previousOnCurve == points[0].coordinates and points[1].coordinates == points[-1].coordinates:
Expand All @@ -162,6 +162,11 @@ def __init__(self, points=None, previousOnCurve=None, willBeReversed=False):
oncurve = points[-1]
oncurve.segmentType = "line"
self.points = points = [oncurve]
elif (_pointOnLine(previousOnCurve, points[-1].coordinates, points[0].coordinates) and
_pointOnLine(previousOnCurve, points[-1].coordinates, points[1].coordinates)):
oncurve = points[-1]
oncurve.segmentType = "line"
self.points = points = [oncurve]
# its a reversed segment the flat points will be set later on in the InputContour
if willBeReversed:
return
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