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# Copyright (c) 2022, Manfred Moitzi
# License: MIT License
from pathlib import Path
import json
import ezdxf
from collections import deque
from ezdxf.render import forms
from ezdxf.math import BoundingBox2d
from ezdxf.math.triangulation import mapbox_earcut_2d
CWD = Path("~/Desktop/Outbox").expanduser()
if not CWD.exists():
CWD = Path(".")
TEST_DATA_DIR = Path(r"..\..\integration_tests\mapbox-test-data")
def hole_in_hole():
shape = list(forms.square(4, center=True))
hole0 = list(forms.square(3, center=True))
hole1 = list(forms.square(2, center=True))
holes = [hole0, hole1]
return shape, holes
def hole_beyond_exterior_path():
shape = list(forms.square(4, center=True))
hole = list(forms.translate(shape, (2, 2)))
return shape, [hole]
def render(func):
doc = ezdxf.new()
msp = doc.modelspace()
colors = deque([1, 2, 3, 4, 5, 6])
shape, holes = func()
msp.add_lwpolyline(shape, close=True)
for hole in holes:
msp.add_lwpolyline(hole, close=True)
for triangle in mapbox_earcut_2d(shape, holes=holes):
msp.add_solid(triangle, dxfattribs={"color": colors[0]})
colors.rotate()
doc.set_modelspace_vport(10)
doc.saveas(CWD / f"{func.__name__}.dxf")
def render_mapbox_test_cases():
for sample in TEST_DATA_DIR.glob("*.json"):
render_test_case(sample)
def render_test_case(filepath: Path):
print(f"processing: {filepath.name}")
doc = ezdxf.new()
msp = doc.modelspace()
colors = deque([1, 2, 3, 4, 5, 6])
with filepath.open("rt") as fp:
data = json.load(fp)
shape = data[0]
holes = data[1:]
msp.add_lwpolyline(shape, close=True, dxfattribs={"layer": "SOURCE"})
for hole in holes:
msp.add_lwpolyline(hole, close=True, dxfattribs={"layer": "SOURCE"})
for triangle in mapbox_earcut_2d(shape, holes=holes):
msp.add_solid(
triangle, dxfattribs={"color": colors[0], "layer": "TRIANGLES"}
)
colors.rotate()
bbox = BoundingBox2d(shape)
doc.set_modelspace_vport(bbox.size.y, bbox.center)
doc.saveas(CWD / f"{filepath.stem}.dxf")
def render_polydata():
for data in POLYGON_DATA0:
filename = data.name.replace(" ", "_") + ".dxf"
doc = ezdxf.new()
msp = doc.modelspace()
colors = deque([1, 2, 3, 4, 5, 6])
for triangle in mapbox_earcut_2d(data.vertices):
msp.add_solid(triangle, dxfattribs={"color": colors[0]})
colors.rotate()
msp.add_lwpolyline(data.vertices, close=True)
bbox = BoundingBox2d(data.vertices)
doc.set_modelspace_vport(bbox.size.y, bbox.center)
doc.saveas(CWD / filename)
class PolyData:
def __init__(self, name, vertices):
self.name = name
self.vertices = vertices
POLYGON_DATA0 = [
PolyData(
name="Star",
vertices=[
(350, 75),
(379, 161),
(469, 161),
(397, 215),
(423, 301),
(350, 250),
(277, 301),
(303, 215),
(231, 161),
(321, 161),
],
),
PolyData(
name="Simple Diamond",
vertices=[
(0, 1),
(-1, 0),
(0, -1),
(1, 0),
],
),
PolyData(
name="No Concave Vertex",
vertices=[
(-2.0, -17.0),
(-2.0, -8.0),
(-8.0, -2.0),
(-17.0, -2.0),
(-20.0, -8.0),
(-18.0, -17.0),
(-12.0, -24.0),
(-7.0, -22.0),
],
),
PolyData(
name="Slanted Side",
vertices=[
(-10.0, -20.0),
(-10.0, -30.0),
(0.0, -20.0),
(0.0, -10.0),
(-20.0, -10.0),
(-20.0, -20.0),
],
),
PolyData(
name="New Thing",
vertices=[
(-20.0, -20.0),
(-10.0, -20.0),
(-10.0, -30.0),
(0.0, -20.0),
(10.0, -20.0),
(0.0, -10.0),
(10.0, 0.0),
(0.0, 0.0),
(-10.0, -10.0),
(-10.0, 0.0),
(-20.0, -10.0),
(-30.0, -10.0),
],
),
PolyData(
name="Edge Case 1",
vertices=[
(40.04332790675601, -30.70794551983977),
(54.13, -30.70794551983977),
(54.13, -28.03),
(69.13, -28.03),
(69.11, -52.53),
(40.04332790675601, -52.53),
],
),
PolyData( # 6
name="Edge Case 2",
vertices=[
(229.28340553, 78.91250014),
(258.42948809, 17.98278109),
(132.01956999, -22.96900817),
(107.97774096, 23.39276058),
(65.85573925, 28.63846858),
(41.66373597, -92.78859248),
(-5.59948763, -54.18987786),
(-44.61508682, -69.7461117),
(-28.41208894, -106.93810071),
(-71.11899145, -125.56044277),
(-100.84787818, -88.51853387),
(-211.53564549, -160.76853269),
(-244.22754588, -147.51172179),
(-226.83717643, -42.0984372),
(-230.65279618, -10.5455196),
(-240.50239817, 70.87826746),
(-12.48219264, 137.70176109),
(4.65848369, 204.21077075),
(176.5243417, 193.73497584),
(171.13537712, 87.27009315),
(229.28340553, 78.91250014),
],
),
PolyData( # 7
name="Edge Case 3-A",
vertices=[
(229, 78),
(66, 28.7),
(-244.2, -147.5),
(-226, -42),
(229, 78),
],
),
PolyData( # 8
name="Edge Case 3-B",
vertices=[
(229000, 78000),
(66000, 28700),
(-244200, -147500),
(-226000, -42000),
(229000, 78000),
],
),
PolyData( # 9
name="Edge Case 4",
vertices=[
(-1179, -842),
(-489, -1049),
(101, -1226),
(520, -558),
(779, -175),
(856, 257),
(544, 806),
(-72, 713),
(-1004, 945),
(-988, 62),
(-1179, -842),
],
),
]
if __name__ == "__main__":
render_mapbox_test_cases()
render(hole_in_hole)
render(hole_beyond_exterior_path)
# render_polydata()
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