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# Copyright (c) 2020-2022, Manfred Moitzi
# License: MIT License
from typing import cast, Tuple
import pathlib
import ezdxf
import random
CWD = pathlib.Path("~/Desktop/Outbox").expanduser()
if not CWD.exists():
CWD = pathlib.Path(".")
# ------------------------------------------------------------------------------
# This example shows how to explode block references with attached ATTRIB
# entities.
#
# https://ezdxf.mozman.at/docs/tutorials/blocks.html
# ------------------------------------------------------------------------------
def get_random_point() -> Tuple[int, int]:
"""Returns random x, y coordinates."""
x = random.randint(-100, 100)
y = random.randint(-100, 100)
return x, y
def main():
doc = ezdxf.new("R2010")
msp = doc.modelspace()
flag = doc.blocks.new(name="FLAG")
flag.add_lwpolyline(
[(0, 0), (0, 5), (4, 3), (0, 3)]
) # the flag symbol as 2D polyline
flag.add_circle(
(0, 0), 0.4, dxfattribs={"color": 1}
) # mark the base point with a circle
flag.add_attdef("NAME", (0.5, -0.5), dxfattribs={"height": 0.5, "color": 3})
flag.add_attdef(
"XPOS", (0.5, -1.0), dxfattribs={"height": 0.25, "color": 4}
)
flag.add_attdef(
"YPOS", (0.5, -1.5), dxfattribs={"height": 0.25, "color": 4}
)
# Create 50 random placing points.
placing_points = [get_random_point() for _ in range(50)]
for number, point in enumerate(placing_points):
# values is a dict with the attribute tag as item-key and
# the attribute text content as item-value.
values = {
"NAME": f"P({number + 1})",
"XPOS": f"x = {point[0]:.3f}",
"YPOS": f"y = {point[1]:.3f}",
}
# Every flag has a different scaling and a rotation of +15 deg.
random_scale = 0.5 + random.random() * 2.0
msp.add_auto_blockref(
"FLAG", point, values, dxfattribs={"rotation": 15}
).set_scale(random_scale)
doc.set_modelspace_vport(200)
doc.saveas(CWD / "flags-with-attribs.dxf")
# Explode auto block references, wrapped into anonymous block references
for auto_blockref in msp.query("INSERT"):
cast("Insert", auto_blockref).explode()
# Explode flag block references
for flag in msp.query("INSERT[name=='FLAG']"):
cast("Insert", flag).explode()
doc.saveas(CWD / "flags-exploded.dxf")
if __name__ == "__main__":
main()
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