2022-03-31 00:01:45 -07:00
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"""
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Wrappers to simplify some pyclipper functions
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"""
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2022-03-27 23:43:52 -07:00
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from typing import Sequence, Optional, List
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from numpy.typing import ArrayLike
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from pyclipper import (
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Pyclipper, PT_CLIP, PT_SUBJECT, CT_UNION, CT_INTERSECTION, PFT_NONZERO, PFT_EVENODD,
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PyPolyNode,
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)
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from .types import contour_t
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def union_nonzero(shapes: Sequence[ArrayLike]) -> Optional[PyPolyNode]:
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if not shapes:
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return None
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pc = Pyclipper()
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pc.AddPaths(shapes, PT_CLIP, closed=True)
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result = pc.Execute2(CT_UNION, PFT_NONZERO, PFT_NONZERO)
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return result
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def union_evenodd(shapes: Sequence[ArrayLike]) -> List[contour_t]:
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if not shapes:
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return []
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pc = Pyclipper()
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pc.AddPaths(shapes, PT_CLIP, closed=True)
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return pc.Execute(CT_UNION, PFT_EVENODD, PFT_EVENODD)
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def intersection_evenodd(
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subject_shapes: Sequence[ArrayLike],
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clip_shapes: Sequence[ArrayLike],
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) -> List[contour_t]:
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if not subject_shapes or not clip_shapes:
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return []
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pc = Pyclipper()
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pc.AddPaths(subject_shapes, PT_SUBJECT, closed=True)
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pc.AddPaths(clip_shapes, PT_CLIP, closed=True)
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return pc.Execute(CT_INTERSECTION, PFT_EVENODD, PFT_EVENODD)
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def hier2oriented(polys: Sequence[PyPolyNode]) -> List[ArrayLike]:
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contours = []
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for poly in polys:
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contours.append(poly.Contour)
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contours += [hole.Contour for hole in poly.Childs]
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return contours
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