1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
# Copyright (C) 2022, Manfred Moitzi
# License: MIT License
import pathlib
import ezdxf
from ezdxf.entities import Hatch, Pattern
from ezdxf.math import Vec2
CWD = pathlib.Path("~/Desktop/Outbox").expanduser()
if not CWD.exists():
CWD = pathlib.Path(".")
ORIGIN = (0.5, 0.5)
def reset_pattern_origin(hatch: Hatch, origin: Vec2):
if isinstance(hatch.pattern, Pattern):
for pattern_line in hatch.pattern.lines:
pattern_line.base_point = origin
def shift_pattern_origin(hatch: Hatch, offset: Vec2):
if isinstance(hatch.pattern, Pattern):
for pattern_line in hatch.pattern.lines:
pattern_line.base_point += offset
def reset_pattern_origin_of_first_pattern_line(hatch: Hatch, origin: Vec2):
if isinstance(hatch.pattern, Pattern) and len(hatch.pattern.lines):
first_pattern_line = hatch.pattern.lines[0]
offset = origin - first_pattern_line.base_point
shift_pattern_origin(hatch, offset)
def main():
doc = ezdxf.new()
msp = doc.modelspace()
points = [(0, 0), (10, 0), (10, 10), (0, 10)]
msp.add_lwpolyline(points, close=True)
hatch = msp.add_hatch()
hatch.paths.add_polyline_path(points)
hatch.set_pattern_fill(
"MyPattern",
color=7,
angle=0,
scale=1.0,
style=0, # normal hatching style
pattern_type=0, # user-defined
definition=[
[0, ORIGIN, (0, 1), []],
[90, ORIGIN, (1, 0), []],
],
)
# setting the seed points has no effect on the pattern origin:
# hatch.set_seed_points([(0.75, 0.75), (0.75, 0.75)])
# resetting the origin works:
# shift_pattern_origin(hatch, Vec2(0.5, 0.5))
reset_pattern_origin_of_first_pattern_line(hatch, Vec2(0, 0))
doc.set_modelspace_vport(12, center=(5, 5))
doc.saveas(CWD / "hatch_pattern_modify_origin.dxf")
if __name__ == "__main__":
main()
|
