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# Copyright (c) 2020, Manfred Moitzi
# License: MIT License
import ezdxf
from ezdxf.tools import pattern
from ezdxf.render.forms import square, translate
HEIGHT = 300
def add_predefined_hatch_pattern(msp, cols, size, gap, scale):
for index, name in enumerate(pattern.ISO_PATTERN.keys()):
x = (index % cols) * (size + gap)
y = (index // cols) * (size + gap)
boundary = list(translate(square(size), (x, HEIGHT - y)))
msp.add_lwpolyline(boundary, close=True, dxfattribs={"layer": "LINE"})
hatch = msp.add_hatch(dxfattribs={"layer": "HATCH"})
hatch.set_pattern_fill(name=name, scale=scale)
hatch.paths.add_polyline_path(boundary, is_closed=True)
if __name__ == "__main__":
# Imperial: Inch
doc = ezdxf.new(units=1)
add_predefined_hatch_pattern(
doc.modelspace(), cols=10, size=10, gap=1, scale=4
)
doc.set_modelspace_vport(HEIGHT, (30, HEIGHT / 2))
doc.saveas("hatch_pattern_imperial.dxf")
# ISO: Meter
doc = ezdxf.new(units=6)
add_predefined_hatch_pattern(
doc.modelspace(), cols=10, size=10, gap=1, scale=0.25
)
doc.set_modelspace_vport(HEIGHT, (30, HEIGHT / 2))
doc.saveas("hatch_pattern_iso.dxf")
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