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# Copyright (c) 2021-2022, Manfred Moitzi
# License: MIT License
import pathlib
import ezdxf
from ezdxf.render.forms import box, translate
from ezdxf import disassemble
from ezdxf import path
CWD = pathlib.Path("~/Desktop/Outbox").expanduser()
if not CWD.exists():
CWD = pathlib.Path(".")
# ------------------------------------------------------------------------------
# This example shows how to create a new HATCH entity from existing
# DXF entities, which is similar to applying then HATCH command to some DXF
# entities in CAD applications
#
# docs:
# disassemble module: https://ezdxf.mozman.at/docs/disassemble.html
# path sub-package: https://ezdxf.mozman.at/docs/path.html
# ------------------------------------------------------------------------------
def main():
doc = ezdxf.new()
doc.layers.new("FORMS", dxfattribs={"color": 1})
doc.layers.new("HATCHES")
msp = doc.modelspace()
attribs = {"layer": "FORMS"}
# Create DXF primitives:
msp.add_circle((2, 3), radius=2, dxfattribs=attribs)
# Ellipse with hole:
msp.add_ellipse((5, 0), major_axis=(3, 1), ratio=0.5, dxfattribs=attribs)
msp.add_circle((5, 0), radius=1.5, dxfattribs=attribs)
# Rectangle with a hole
rect = translate(box(3, 2), (3, 6))
msp.add_lwpolyline(rect, close=True, dxfattribs=attribs)
hole = translate(box(2, 1), (3.4, 6.4))
msp.add_lwpolyline(hole, close=True, dxfattribs=attribs)
# Convert entities to primitives
primitives = disassemble.to_primitives(msp)
# Collect paths from primitives:
paths = [p.path for p in primitives if p.path]
# Render these paths as HATCH entities
path.render_hatches(msp, paths, dxfattribs={"layer": "HATCHES", "color": 2})
doc.set_modelspace_vport(15, (4, 4))
doc.saveas(CWD / "hatches_from_entities.dxf")
if __name__ == "__main__":
main()
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