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# Copyright (c) 2025, Manfred Moitzi
# License: MIT License
from __future__ import annotations
from pathlib import Path
import ezdxf
from ezdxf import edgeminer as em
from ezdxf import edgesmith as es
CWD = Path(__file__).parent
OUTBOX = Path("~/Desktop/Outbox").expanduser()
def load(filename: str) -> list[em.Edge]:
doc = ezdxf.readfile(CWD / filename)
msp = doc.modelspace()
edges = list(es.edges_from_entities_2d(msp))
return edges
def make_hatch_with_polyline_path(edges: list[em.Edge], outname: str) -> None:
doc = ezdxf.new()
msp = doc.modelspace()
dxfattribs = {"layer": "HATCH"}
deposit = em.Deposit(edges)
for loop in em.find_all_simple_chains(deposit):
hatch = msp.add_hatch(color=2, dxfattribs=dxfattribs)
polyline_path = es.polyline_path_from_chain(loop, max_sagitta=0.1)
hatch.paths.append(polyline_path)
doc.saveas(OUTBOX / outname)
def make_hatch_without_arcs(edges: list[em.Edge], outname: str) -> None:
doc = ezdxf.new()
msp = doc.modelspace()
dxfattribs = {"layer": "HATCH"}
deposit = em.Deposit(edges)
for loop in em.find_all_simple_chains(deposit):
hatch = msp.add_hatch(color=2, dxfattribs=dxfattribs)
# 2D path as intermediate_step:
path2d = es.path2d_from_chain(loop)
# flatten everything:
hatch.paths.add_polyline_path(path2d.flattening(distance=0.1))
doc.saveas(OUTBOX / outname)
def make_hatch_with_edge_path(edges: list[em.Edge], outname: str) -> None:
doc = ezdxf.new()
msp = doc.modelspace()
dxfattribs = {"layer": "HATCH"}
deposit = em.Deposit(edges)
for loop in em.find_all_simple_chains(deposit):
hatch = msp.add_hatch(color=2, dxfattribs=dxfattribs)
edge_path = es.edge_path_from_chain(loop, max_sagitta=0.1)
hatch.paths.append(edge_path)
doc.saveas(OUTBOX / outname)
FILE_6 = "6_closed_loop_with_arcs.dxf"
def main():
doc = load(FILE_6)
make_hatch_with_polyline_path(doc, "make_hatch_with_polyline_path.dxf")
make_hatch_without_arcs(doc, "make_hatch_without_arcs.dxf")
make_hatch_with_edge_path(doc, "make_hatch_with_edge_path.dxf")
if __name__ == "__main__":
main()
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