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# Copyright (C) 2011-2020, Manfred Moitzi
# License: MIT License
import pytest
import ezdxf
from ezdxf.lldxf.extendedtags import ExtendedTags
from ezdxf.entities.lwpolyline import (
format_point,
compile_array,
LWPolylinePoints,
LWPolyline,
)
from ezdxf.math import Vec3
def lwpolyline(points, dxfattribs=None):
line = LWPolyline.new(dxfattribs=dxfattribs)
line.set_points(points)
return line
def lwtags(text):
tags = ExtendedTags.from_text(text)
return tags.get_subclass("AcDbPolyline")
def test_new_line():
points = [(1, 1), (2, 2), (3, 3)]
line = lwpolyline(points)
assert points == list(line.vertices())
assert 3 == len(line)
assert line.closed is False, "Polyline should be open by default."
# test callback DXF attribute
assert 3 == line.dxf.count # DXF attrib callback
with pytest.raises(ezdxf.DXFAttributeError):
line.dxf.count = 0 # set dxf tag 90
def test_get_point():
points = [(1, 1), (2, 2), (3, 3)]
line = lwpolyline(points)
assert (1, 1, 0, 0, 0) == tuple(line[0])
assert (3, 3, 0, 0, 0) == tuple(line[-1])
def test_slicing():
points = [(1, 1), (2, 2), (3, 3)]
line = lwpolyline(points)
assert len(line[:1]) == 1
assert len(line[:]) == 3
assert len(line[:2]) == 2
assert len(line[:-1]) == 2
assert len(line[1:-1]) == 1
result = line[::-1]
assert len(result) == 3
assert tuple(result[0]) == (3, 3, 0, 0, 0)
assert tuple(result[1]) == (2, 2, 0, 0, 0)
assert tuple(result[2]) == (1, 1, 0, 0, 0)
def test_set_point():
points = [(1, 1), (2, 2), (3, 3)]
line = lwpolyline(points)
line[0] = (4, 4)
assert (4, 4, 0, 0, 0) == tuple(line[0])
line[-1] = (4, 4)
assert (4, 4, 0, 0, 0) == tuple(line[-1])
def test_get_point_error():
points = [(1, 1), (2, 2), (3, 3)]
line = lwpolyline(points)
with pytest.raises(IndexError):
line[3]
def test_insert_point():
points = [(1, 1), (2, 2), (3, 3), (4, 4), (5, 5)]
line = lwpolyline(points)
assert len(line) == 5
line.insert(0, (7, 8))
assert len(line) == 6
assert tuple(line[0]) == (7, 8, 0, 0, 0)
assert tuple(line[1]) == (1, 1, 0, 0, 0)
assert tuple(line[-1]) == (5, 5, 0, 0, 0)
line.insert(1, (1, 9, 4), format="bxy")
assert len(line) == 7
assert tuple(line[0]) == (7, 8, 0, 0, 0)
assert tuple(line[1]) == (9, 4, 0, 0, 1)
assert tuple(line[2]) == (1, 1, 0, 0, 0)
assert tuple(line[-1]) == (5, 5, 0, 0, 0)
def test_del_points():
points = [(1, 1), (2, 2), (3, 3), (4, 4), (5, 5)]
line = lwpolyline(points)
assert len(line) == 5
del line[0]
assert len(line) == 4
assert tuple(line[0]) == (2, 2, 0, 0, 0)
assert tuple(line[-1]) == (5, 5, 0, 0, 0)
del line[:2]
assert len(line) == 2
assert tuple(line[0]) == (4, 4, 0, 0, 0)
assert tuple(line[-1]) == (5, 5, 0, 0, 0)
def test_append_points():
points = [(1, 1), (2, 2), (3, 3)]
line = lwpolyline(points)
line.append_points([(4, 4), (5, 5)])
assert (4, 4, 0, 0, 0) == tuple(line[-2])
def test_context_manager():
points = [(1, 1), (2, 2), (3, 3)]
line = lwpolyline(points)
with line.points() as p:
p.extend([(4, 4), (5, 5)])
assert (4, 4, 0, 0, 0) == tuple(line[-2])
def test_clear():
points = [(1, 1), (2, 2), (3, 3)]
line = lwpolyline(points)
line.closed = True
assert line.closed is True, "Polyline should be closed"
line.clear()
assert 0 == len(line), "Polyline count should be 0."
assert (
len(list(line.get_points())) == 0
), "Polyline should not have any points."
assert line.closed is True, "Polyline should be closed"
def test_delete_const_width():
points = [(1, 1), (2, 2), (3, 3)]
line = lwpolyline(points)
line.dxf.const_width = 0.1
assert 0.1 == pytest.approx(line.dxf.const_width)
del line.dxf.const_width
def test_vertices():
points = [(0, 0, 1, 1, 1), (2, 2, 1, 1, 1), (3, 3, 1, 1, 1)]
line = lwpolyline(points)
assert list(line.vertices()) == [(0, 0), (2, 2), (3, 3)]
def test_format_point():
assert format_point((1, 2, 3, 4, 5), "xy") == (1, 2)
assert format_point((1, 2, 3, 4, 5), "bse") == (5, 3, 4)
assert format_point((1, 2, 3, 4, 5), "v,b") == ((1, 2), 5)
def test_point_to_array():
assert tuple(compile_array((1, 2), "xy")) == (1, 2, 0, 0, 0)
assert tuple(compile_array((1, 2, 5), "xyb")) == (1, 2, 0, 0, 5)
assert tuple(compile_array((1, 2), "xyseb")) == (1, 2, 0, 0, 0)
assert tuple(compile_array((1, 2, 5), "xy")) == (1, 2, 0, 0, 0)
assert tuple(compile_array((5, (1, 2)), "b,v")) == (1, 2, 0, 0, 5)
# mix of x, y, v codes is allowed, but only last is set
assert tuple(compile_array(((1, 2), 4, 5), "vxy")) == (4, 5, 0, 0, 0)
def test_packed_points_basics():
packed_points, _ = LWPolylinePoints.from_tags(lwtags(LWPOLYLINE1))
assert len(packed_points) == 2
points = list(packed_points)
assert len(points) == 2
assert tuple(packed_points[0]) == (-0.5, -0.5, 0, 0, 0)
assert tuple(packed_points[1]) == (0.5, 0.5, 0, 0, 0)
# test negative index
assert tuple(packed_points[-1]) == (0.5, 0.5, 0, 0, 0)
with pytest.raises(IndexError):
packed_points[-3]
with pytest.raises(IndexError):
packed_points[2]
def test_packed_points_advanced():
packed_points, _ = LWPolylinePoints.from_tags(lwtags(LWPOLYLINE1))
packed_points.append((5, 5, 1, 2, 3))
assert len(packed_points) == 3
assert tuple(packed_points[-1]) == (5, 5, 1, 2, 3)
packed_points[0] = (7, 7, 0, 0, 0)
assert tuple(packed_points[0]) == (7, 7, 0, 0, 0)
assert len(packed_points) == 3
packed_points.clear()
assert len(packed_points) == 0
def test_packed_points_to_dxf_tags():
packed_points, _ = LWPolylinePoints.from_tags(lwtags(LWPOLYLINE1))
tags = list(packed_points.dxftags())
assert len(tags) == 2 # just the points
assert tags[0] == (10, (-0.5, -0.5))
assert tags[1] == (10, (0.5, 0.5))
def test_packed_points_to_dxf_tags_with_bulge():
packed_points, _ = LWPolylinePoints.from_tags(lwtags(LWPOLYLINE1))
packed_points[0] = (-0.5, -0.5, 0, 0, 1)
packed_points[1] = (0.5, 0.5, 0.1, 0.2, -1)
tags = list(packed_points.dxftags())
assert len(tags) == 6
assert tags[0] == (10, (-0.5, -0.5))
assert tags[1] == (42, 1)
assert tags[2] == (10, (0.5, 0.5))
assert tags[3] == (40, 0.1)
assert tags[4] == (41, 0.2)
assert tags[5] == (42, -1)
def test_lwpolyline_transform_interface():
pline = LWPolyline()
pline.set_points([(0, 0), (2, 0), (1, 1)], format="xy")
pline.translate(1, 1, 1)
vertices = list(pline.vertices())
assert vertices[0] == (1, 1)
assert vertices[1] == (3, 1)
assert vertices[2] == (2, 2)
assert pline.dxf.elevation == 1
assert Vec3(0, 0, 1).isclose(pline.dxf.extrusion)
LWPOLYLINE1 = """0
LWPOLYLINE
5
239
330
238
100
AcDbEntity
8
0
6
ByBlock
62
0
100
AcDbPolyline
90
2
70
0
43
0.15
10
-0.5
20
-0.5
10
0.5
20
0.5
"""
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