def test_full_circle_ellipse_edge_transformation(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_reflections(self, s, e, rotation, sx, sy):
m = Matrix44.chain(
Matrix44.scale(sx, sy, 1),
Matrix44.z_rotate(rotation),
)
expected_start = m.transform(Vec3.from_deg_angle(s))
expected_end = m.transform(Vec3.from_deg_angle(e))
expected_angle_span = arc_angle_span_deg(s, e)
ocs = OCSTransform(Z_AXIS, m)
new_s, new_e = ocs.transform_ccw_arc_angles_deg(s, e)
wcs_start = ocs.new_ocs.to_wcs(Vec3.from_deg_angle(new_s))
wcs_end = ocs.new_ocs.to_wcs(Vec3.from_deg_angle(new_e))
assert arc_angle_span_deg(new_s, new_e) == pytest.approx(
expected_angle_span
)
assert wcs_start.isclose(expected_start)
assert wcs_end.isclose(expected_end)
def test_dimension_line_divided_by_measurement_text(doc: Drawing, s, e):
"""Vertical centered measurement text should hide the part of the
dimension line beneath the text. This creates two arcs instead of one.
"""
msp = doc.modelspace()
dim = msp.add_angular_dim_cra(
center=Vec2(),
radius=5,
start_angle=s,
end_angle=e,
distance=2,
override={"dimtad": 0}, # vertical centered text
)
dim.render()
arcs = dim.dimension.get_geometry_block().query("ARC")
assert len(arcs) == 2
assert sum(
arc_angle_span_deg(arc.dxf.start_angle, arc.dxf.end_angle)
for arc in arcs) < arc_angle_span_deg(
s, e), "sum of visual arcs should be smaller than the full arc"
def transform(self, m: Matrix44) -> 'Arc':
""" Transform ARC entity by transformation matrix `m` inplace.
Raises ``NonUniformScalingError()`` for non uniform scaling.
"""
ocs = OCSTransform(self.dxf.extrusion, m)
super().transform(m)
s = self.dxf.start_angle
e = self.dxf.end_angle
if not math.isclose(arc_angle_span_deg(s, e), 360.0):
self.dxf.start_angle = ocs.transform_deg_angle(s)
self.dxf.end_angle = ocs.transform_deg_angle(e)
return self
def transform(self, m: Matrix44) -> "Arc":
"""Transform ARC entity by transformation matrix `m` inplace.
Raises ``NonUniformScalingError()`` for non uniform scaling.
"""
ocs = OCSTransform(self.dxf.extrusion, m)
super()._transform(ocs)
s: float = self.dxf.start_angle
e: float = self.dxf.end_angle
if not math.isclose(arc_angle_span_deg(s, e), 360.0):
(
self.dxf.start_angle,
self.dxf.end_angle,
) = ocs.transform_ccw_arc_angles_deg(s, e)
self.post_transform(m)
return self
def transform(self, ocs: OCSTransform, elevation: float) -> None:
self.center = ocs.transform_2d_vertex(self.center, elevation)
self.radius = ocs.transform_length(Vec3(self.radius, 0, 0))
if not math.isclose(
arc_angle_span_deg(self.start_angle, self.end_angle), 360.0
): # open arc
# The transformation of the ccw flag is not necessary for the current
# implementation of OCS transformations. The arc angles have always
# a counter clockwise orientation around the extrusion vector and
# this orientation is preserved even for mirroring, which flips the
# extrusion vector to (0, 0, -1) for entities in the xy-plane.
self.start_angle = ocs.transform_deg_angle(self.start_angle)
self.end_angle = ocs.transform_deg_angle(self.end_angle)
else: # full circle
# Transform only start point to preserve the connection point to
# adjacent edges:
self.start_angle = ocs.transform_deg_angle(self.start_angle)
# ArcEdge is represented in counter-clockwise orientation:
self.end_angle = self.start_angle + 360.0
def span(self, s, e):
return arc_angle_span_deg(s, e)
def test_arc(self, start, end, expected):
assert arc_angle_span_deg(start, end) == pytest.approx(expected)
def test_full_circle(self, start, end):
assert arc_angle_span_deg(start, end) == 360.0
def test_no_arc(self, start, end):
assert arc_angle_span_deg(start, end) == 0
