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add difference_evenodd

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This commit is contained in:
Jan Petykiewicz 2022-04-05 18:19:57 -07:00
parent 543d308977
commit 40cd9903f6
1 changed files with 14 additions and 0 deletions
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14
snarled/clipper.py
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@ -41,6 +41,20 @@ def intersection_evenodd(
return pc.Execute(CT_INTERSECTION, PFT_EVENODD, PFT_EVENODD)
def difference_evenodd(
subject_shapes: Sequence[ArrayLike],
clip_shapes: Sequence[ArrayLike],
) -> List[contour_t]:
if not subject_shapes:
return []
if not clip_shapes:
return subject_shapes
pc = Pyclipper()
pc.AddPaths(subject_shapes, PT_SUBJECT, closed=True)
pc.AddPaths(clip_shapes, PT_CLIP, closed=True)
return pc.Execute(CT_DIFFERENCE, PFT_EVENODD, PFT_EVENODD)
def hier2oriented(polys: Sequence[PyPolyNode]) -> List[ArrayLike]:
contours = []
for poly in polys: