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# Copyright (c) 2018-2022 Manfred Moitzi
# License: MIT License
import random
import pathlib
import ezdxf
from ezdxf.math import Vec3
from ezdxf.enums import SortEntities
CWD = pathlib.Path("~/Desktop/Outbox").expanduser()
if not CWD.exists():
CWD = pathlib.Path(".")
# ------------------------------------------------------------------------------
# This example shows how to change the redraw-order of DXF entities.
#
# docs:
# Baselayout: https://ezdxf.mozman.at/docs/layouts/layouts.html#baselayout
# reorder module: https://ezdxf.mozman.at/docs/reorder.html
# ------------------------------------------------------------------------------
def random_in_range(a, b):
return random.random() * float(b - a) + a
def random_pos(lower_left=(0, 0), upper_right=(100, 100)):
x0, y0 = lower_left
x1, y1 = upper_right
x = random_in_range(x0, x1)
y = random_in_range(y0, y1)
return Vec3(x, y)
def add_solids(
msp, count=20, min_size=1, max_size=5, color=None, layer="SOLIDS"
):
def add_solid(pos, size, dxfattribs):
points = [
pos,
pos + (size, 0),
pos + (0, size),
pos + (size, size),
]
msp.add_solid(points, dxfattribs=dxfattribs)
dxfattribs = {
"color": color,
"layer": layer,
}
for _ in range(count):
pos = random_pos((0, 0), (100, 100))
size = random_in_range(min_size, max_size)
if color is None:
dxfattribs["color"] = random.randint(1, 7)
dxfattribs["layer"] = "color_" + str(dxfattribs["color"])
add_solid(pos, size, dxfattribs)
def order_solids_by_color(msp):
# AutoCAD regenerates entities in ascending handle order.
# Change redraw order for DXF entities by assigning a sort-handle to an
# objects handle.
# The sort-handle can be any handle you want, even '0', but this sort-handle
# will be drawn as latest (on top of all other entities) and not as first as
# expected.
#
# use the ACI color as sort-handle
# '%X': uppercase hex-value without 0x prefix, like 'FF'
msp.set_redraw_order(
(solid.dxf.handle, "%X" % solid.dxf.color)
for solid in msp.query("SOLID")
)
def reverse_order_solids_by_color(msp):
msp.set_redraw_order(
(solid.dxf.handle, "%X" % (10 - solid.dxf.color))
for solid in msp.query("SOLID")
)
def move_solids_on_top(msp, color, sort_handle="FFFF"):
# This also works if a redraw-order is already set
# returns a list of [(object_handle, sort_handle), ...] -> dict
order = dict(msp.get_redraw_order())
for solid in msp.query(f"SOLID[color=={color}]"):
order[solid.dxf.handle] = sort_handle
msp.set_redraw_order(order) # accepts also a dict
def remove_solids(msp, color=6):
for solid in msp.query(f"SOLID[color=={color}]"):
msp.delete_entity(solid)
def main():
doc = ezdxf.new("R2004") # does not work with AC1015/R2000, but it should
doc.header["$SORTENTS"] = SortEntities.REGEN
msp = doc.modelspace()
add_solids(msp, count=1000, min_size=3, max_size=7)
doc.saveas(CWD / "sort_solids_unordered.dxf")
order_solids_by_color(msp) # 1 -> 7
doc.saveas(CWD / "sort_solids_ordered.dxf")
reverse_order_solids_by_color(msp) # 7 -> 1
doc.saveas(CWD / "sort_solids_reversed_ordered.dxf")
move_solids_on_top(msp, 6) # 7, 5, 4, 3, 2, 1, 6
doc.saveas(CWD / "sort_solids_6_on_top.dxf") # 6 is magenta
# AutoCAD ignores removed entities in the redraw-order-table (SORTENTSTABLE)
remove_solids(msp, 6)
doc.saveas(CWD / "sort_solids_removed_color_6.dxf")
if __name__ == "__main__":
main()
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