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# Copyright (c) 2021, Manfred Moitzi
# License: MIT License
import pytest
import math
from ezdxf.entities import Hatch
from ezdxf.render.forms import box
from ezdxf.math import Vec2, Vec3, Matrix44, arc_angle_span_deg
from ezdxf.path import make_path, have_close_control_vertices
@pytest.fixture()
def m44():
return Matrix44.chain(
Matrix44.z_rotate(math.pi / 2),
Matrix44.translate(1, 2, 0),
)
def test_polyline_path_transform_interface(m44):
hatch = Hatch.new()
vertices = list(box(1.0, 2.0))
path = hatch.paths.add_polyline_path(vertices)
hatch.transform(m44)
chk = m44.transform_vertices(vertices)
for v, c in zip(path.vertices, chk):
assert c.isclose(v)
def test_edge_path_transform_interface(m44):
hatch = Hatch.new()
path = hatch.paths.add_edge_path()
path.add_line((0, 0), (10, 0))
path.add_arc((10, 5), radius=5, start_angle=270, end_angle=450, ccw=1)
path.add_ellipse(
(5, 10), major_axis=(5, 0), ratio=0.2, start_angle=0, end_angle=180
)
spline = path.add_spline(
[(1, 1), (2, 2), (3, 3), (4, 4)], degree=3, periodic=1
)
# the following values do not represent a mathematically valid spline
spline.control_points = [(1, 1), (2, 2), (3, 3), (4, 4)]
spline.knot_values = [1, 2, 3, 4, 5, 6]
spline.weights = [4, 3, 2, 1]
spline.start_tangent = (10, 1)
spline.end_tangent = (2, 20)
chk = list(
m44.transform_vertices(
[
Vec3(0, 0),
Vec3(10, 0),
Vec3(10, 5),
Vec3(5, 10),
Vec3(1, 1),
Vec3(2, 2),
Vec3(3, 3),
Vec3(4, 4),
]
)
)
hatch.transform(m44)
line = path.edges[0]
assert chk[0].isclose(line.start)
assert chk[1].isclose(line.end)
arc = path.edges[1]
assert chk[2].isclose(arc.center)
ellipse = path.edges[2]
assert chk[3].isclose(ellipse.center)
spline = path.edges[3]
for c, v in zip(chk[4:], spline.control_points):
assert c.isclose(v)
for c, v in zip(chk[4:], spline.fit_points):
assert c.isclose(v)
assert m44.transform_direction((10, 1, 0)).isclose(spline.start_tangent)
assert m44.transform_direction((2, 20, 0)).isclose(spline.end_tangent)
@pytest.fixture(params=["arc", "ellipse"])
def closed_edge_hatch(request):
_hatch = Hatch.new()
_path = _hatch.paths.add_edge_path()
if request.param == "arc":
_path.add_arc((0, 0), radius=1, start_angle=0, end_angle=360, ccw=1)
elif request.param == "ellipse":
_path.add_ellipse(
(0, 0), major_axis=(5, 0), ratio=0.2, start_angle=0, end_angle=360
)
return _hatch
def test_full_circle_ellipse_edge_rotation(closed_edge_hatch):
edge = closed_edge_hatch.paths[0].edges[0]
assert arc_angle_span_deg(
edge.start_angle, edge.end_angle
) == pytest.approx(360)
closed_edge_hatch.transform(Matrix44.z_rotate(math.radians(30)))
edge2 = closed_edge_hatch.paths[0].edges[0]
assert arc_angle_span_deg(
edge2.start_angle, edge2.end_angle
) == pytest.approx(360)
def test_full_circle_edge_scaling():
_hatch = Hatch.new()
_path = _hatch.paths.add_edge_path()
_arc = _path.add_arc((0, 0), radius=1, start_angle=0, end_angle=360, ccw=1)
_hatch.transform(Matrix44.scale(0.5, 0.5, 0.5))
assert _arc.radius == pytest.approx(0.5)
def transformed_copy(entity, matrix):
_copy = entity.copy()
_copy.transform(matrix)
return _copy
@pytest.mark.parametrize(
"sx, sy, extrusion",
[
(-1, 1, (0, 0, -1)),
(1, -1, (0, 0, -1)),
(-1, -1, (0, 0, 1)),
],
ids=["mirror-x", "mirror-y", "mirror-xy"],
)
@pytest.mark.parametrize("kind", ["arc", "ellipse"])
def test_ocs_mirror_transformations_of_clockwise_oriented_curves(
sx,
sy,
extrusion,
kind,
):
hatch = Hatch()
edge_path = hatch.paths.add_edge_path()
if kind == "arc":
edge_path.add_arc((7, 0), 5, start_angle=0, end_angle=180, ccw=False)
elif kind == "ellipse":
edge_path.add_ellipse(
(7, 0), (5, 0), ratio=0.7, start_angle=0, end_angle=180, ccw=False
)
else:
pytest.fail(f"unknown kind: {kind}")
transformed_hatch = transformed_copy(hatch, Matrix44.scale(sx, sy, 1))
# This tests the current implementation of OCS transformations!
assert transformed_hatch.dxf.extrusion.isclose(extrusion)
assert (
transformed_hatch.paths[0].edges[0].ccw is False
), "ccw flag should not change"
@pytest.mark.parametrize(
"sx, sy",
[(-1, 1), (1, -1), (-1, -1)],
ids=["mirror-x", "mirror-y", "mirror-xy"],
)
@pytest.mark.parametrize("kind", ["arc", "ellipse"])
def test_wcs_mirror_transformations_of_clockwise_oriented_curves(sx, sy, kind):
hatch = Hatch()
edge_path = hatch.paths.add_edge_path()
# A closed loop is required to get a path!
edge_path.add_line((15, 5), (5, 5))
if kind == "arc":
edge_path.add_arc((10, 5), 5, start_angle=0, end_angle=180, ccw=False)
elif kind == "ellipse":
edge_path.add_ellipse(
(10, 5), (5, 0), ratio=0.7, start_angle=0, end_angle=180, ccw=False
)
else:
pytest.fail(f"unknown kind: {kind}")
src_path = make_path(hatch)
assert len(src_path) > 1, "expected non empty path"
m = Matrix44.scale(sx, sy, 1)
transformed_hatch = transformed_copy(hatch, m)
expected_path = src_path.transform(m)
path_of_transformed_hatch = make_path(transformed_hatch)
assert (
have_close_control_vertices(path_of_transformed_hatch, expected_path)
is True
)
@pytest.mark.parametrize(
"sx, sy",
[(-1, 1), (1, -1), (-1, -1)],
ids=["mirror-x", "mirror-y", "mirror-xy"],
)
def test_wcs_mirror_transformations_for_all_edge_types(
sx, sy, all_edge_types_hatch
):
hatch = all_edge_types_hatch
src_path = make_path(hatch)
assert len(src_path) > 1, "expected non empty path"
m = Matrix44.scale(sx, sy, 1)
transformed_hatch = transformed_copy(hatch, m)
expected_path = src_path.transform(m)
path_of_transformed_hatch = make_path(transformed_hatch)
assert (
have_close_control_vertices(path_of_transformed_hatch, expected_path)
is True
)
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