51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
"""
|
|
Wrappers to simplify some pyclipper functions
|
|
"""
|
|
from typing import Sequence, Optional, List
|
|
|
|
from numpy.typing import ArrayLike
|
|
from pyclipper import (
|
|
Pyclipper, PT_CLIP, PT_SUBJECT, CT_UNION, CT_INTERSECTION, PFT_NONZERO, PFT_EVENODD,
|
|
PyPolyNode,
|
|
)
|
|
|
|
from .types import contour_t
|
|
|
|
|
|
def union_nonzero(shapes: Sequence[ArrayLike]) -> Optional[PyPolyNode]:
|
|
if not shapes:
|
|
return None
|
|
pc = Pyclipper()
|
|
pc.AddPaths(shapes, PT_CLIP, closed=True)
|
|
result = pc.Execute2(CT_UNION, PFT_NONZERO, PFT_NONZERO)
|
|
return result
|
|
|
|
|
|
def union_evenodd(shapes: Sequence[ArrayLike]) -> List[contour_t]:
|
|
if not shapes:
|
|
return []
|
|
pc = Pyclipper()
|
|
pc.AddPaths(shapes, PT_CLIP, closed=True)
|
|
return pc.Execute(CT_UNION, PFT_EVENODD, PFT_EVENODD)
|
|
|
|
|
|
def intersection_evenodd(
|
|
subject_shapes: Sequence[ArrayLike],
|
|
clip_shapes: Sequence[ArrayLike],
|
|
) -> List[contour_t]:
|
|
if not subject_shapes or not clip_shapes:
|
|
return []
|
|
pc = Pyclipper()
|
|
pc.AddPaths(subject_shapes, PT_SUBJECT, closed=True)
|
|
pc.AddPaths(clip_shapes, PT_CLIP, closed=True)
|
|
return pc.Execute(CT_INTERSECTION, PFT_EVENODD, PFT_EVENODD)
|
|
|
|
|
|
def hier2oriented(polys: Sequence[PyPolyNode]) -> List[ArrayLike]:
|
|
contours = []
|
|
for poly in polys:
|
|
contours.append(poly.Contour)
|
|
contours += [hole.Contour for hole in poly.Childs]
|
|
|
|
return contours
|