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# Copyright (c) 2020, Manfred Moitzi
# License: MIT License
import pytest
import ezdxf
from ezdxf.render.trace import TraceBuilder, LinearTrace, CurvedTrace
from ezdxf.math import BSpline, Vec2, BoundingBox
def test_trace_builder_init():
t = TraceBuilder()
assert len(t) == 0
def test_add_station_2d():
t = LinearTrace()
t.add_station((0, 0), 1, 2)
assert len(t) == 1
assert t[0].vertex == (0, 0)
assert t[0].start_width == 1
assert t[0].end_width == 2
t.add_station((1, 0), 1)
assert len(t) == 2
assert t[1].vertex == (1, 0)
assert t[1].start_width == 1
assert t[1].end_width == 1
def test_add_station_3d():
# z-axis is ignored
t = LinearTrace()
t.add_station((0, 0, 0), 1, 2)
assert t[0].vertex == (0, 0)
def test_add_spline_segment():
t = CurvedTrace.from_spline(
BSpline.from_fit_points([(1, 0), (3, 1), (5, -1), (6, 0)]),
start_width=2,
end_width=1,
segments=10,
)
assert len(t) == 11
def test_square_face():
t = LinearTrace()
t.add_station((0, 0), 1, 1)
t.add_station((1, 0), 0, 0)
face = list(t.faces())[0]
assert face[0].isclose(Vec2(0, +0.5))
assert face[1].isclose(Vec2(0, -0.5))
assert face[2].isclose(Vec2(1, -0.5))
assert face[3].isclose(Vec2(1, +0.5))
def test_closed_linear_path():
t = LinearTrace()
t.add_station((0, 0), 1, 1)
t.add_station((1, 0), 1, 1)
t.add_station((1, 1), 1, 1)
t.add_station((0, 1), 1, 1)
t.add_station((0, 0), 1, 1)
faces = list(t.faces())
assert len(faces) == 4
assert faces[0] == (
Vec2(0.5, 0.5),
Vec2(-0.5, -0.5),
Vec2(1.5, -0.5),
Vec2(0.5, 0.5),
)
assert faces[3] == (
Vec2(0.5, 0.5),
Vec2(-0.5, 1.5),
Vec2(-0.5, -0.5),
Vec2(0.5, 0.5),
)
def test_two_straight_faces():
t = LinearTrace()
t.add_station((0, 0), 1, 1)
t.add_station((2, 0), 1, 1)
t.add_station((4, 0), 1, 1)
face1, face2 = list(t.faces())
assert face1[0].isclose(Vec2(0, +0.5))
assert face1[1].isclose(Vec2(0, -0.5))
assert face1[2].isclose(Vec2(2, -0.5))
assert face1[3].isclose(Vec2(2, +0.5))
assert face2[0].isclose(Vec2(2, +0.5))
assert face2[1].isclose(Vec2(2, -0.5))
assert face2[2].isclose(Vec2(4, -0.5))
assert face2[3].isclose(Vec2(4, +0.5))
def test_two_angled_faces():
t = LinearTrace()
t.add_station((0, 0), 1, 0.5)
t.add_station((2, 0), 1, 1)
t.add_station((4, 2), 1, 1)
face1, face2 = list(t.faces())
assert face1[0].isclose(Vec2(0, +0.5))
assert face1[1].isclose(Vec2(0, -0.5))
assert face1[2].isclose(Vec2(2.5224077499274835, -0.18469903125906456))
assert face1[3].isclose(Vec2(1.5936828611675133, 0.3007896423540608))
assert face2[2].isclose(Vec2(4.353553390593274, 1.6464466094067263))
assert face2[3].isclose(Vec2(3.646446609406726, 2.353553390593274))
def test_linear_trace_polygon():
t = LinearTrace()
t.add_station((0, 0), 1, 1)
t.add_station((2, 0), 1, 1)
t.add_station((4, 0), 1, 1)
polygon = t.polygon()
assert len(polygon) == 6
assert polygon[0].isclose(Vec2(0, -0.5))
assert polygon[-1].isclose(Vec2(0, +0.5))
def test_virtual_entities_added_to_entity_database():
doc = ezdxf.new()
msp = doc.modelspace()
t = LinearTrace()
t.add_station((0, 0), 1, 1)
t.add_station((1, 0), 0, 0)
dxfattribs = {"layer": "TEST"}
solid = list(t.virtual_entities("SOLID", dxfattribs, doc))[0]
assert solid.DXFTYPE == "SOLID"
assert solid.dxf.layer == "TEST"
assert solid.dxf.handle in doc.entitydb
msp.add_entity(solid)
trace = list(t.virtual_entities("TRACE", dxfattribs, doc))[0]
assert trace.DXFTYPE == "TRACE"
assert trace.dxf.layer == "TEST"
assert trace.dxf.handle in doc.entitydb
msp.add_entity(trace)
face = list(t.virtual_entities("3DFACE", dxfattribs, doc))[0]
assert face.DXFTYPE == "3DFACE"
assert face.dxf.layer == "TEST"
assert face.dxf.handle in doc.entitydb
msp.add_entity(face)
assert len(msp) == 3
def test_issue_191():
from ezdxf.entities import factory
e = factory.new(
"LWPOLYLINE",
dxfattribs={
"flags": 1,
},
)
e.set_points(
[
(421846.9857097387, -36908.41493252141, 0.0, 50.0, 0.52056705),
(421846.9857097387, -36908.41493252139, 0.0, 50.0, 0.52056705),
]
)
trace = TraceBuilder.from_polyline(e, segments=64)
assert len(trace) == 1
assert len(list(trace.faces())) == 32
def test_nearly_horizontal_parallel_lines_in_linear_trace_builder():
width = 30
trace = LinearTrace()
trace.add_station((100, 0), width, width)
trace.add_station((100_000, 0), width, width)
trace.add_station((0, 0.001), width, width)
bbox = BoundingBox()
for face in trace.faces():
bbox.extend(face)
assert bbox.extmin.x > -100
def test_nearly_vertical_parallel_lines_in_linear_trace_builder():
width = 30
trace = LinearTrace()
trace.add_station((0, 100), width, width)
trace.add_station((0, 100_000), width, width)
trace.add_station((0.001, 0), width, width)
bbox = BoundingBox()
for face in trace.faces():
bbox.extend(face)
assert bbox.extmin.y > -100
if __name__ == "__main__":
pytest.main([__file__])
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