def test_load_malformed_circle():
circle = Circle.from_text(MALFORMED_CIRCLE)
assert circle.dxf.layer == "LY_EZDXF"
assert circle.dxf.linetype == "LT_EZDXF"
assert circle.dxf.color == 7
assert circle.dxf.center.isclose((1, 2, 3))
assert circle.dxf.radius == 2.0
def test_circle_fast_translation():
circle = Circle.new(
dxfattribs={'center': (2, 3, 4), 'extrusion': Vector.random()})
ocs = circle.ocs()
offset = Vector(1, 2, 3)
center = ocs.to_wcs(circle.dxf.center) + offset
circle.translate(*offset)
assert ocs.to_wcs(circle.dxf.center).isclose(center, abs_tol=1e-9)
def test_circle_default_ocs():
circle = Circle.new(dxfattribs={'center': (2, 3, 4), 'thickness': 2})
# 1. rotation - 2. scaling - 3. translation
m = Matrix44.chain(Matrix44.scale(2, 2, 3), Matrix44.translate(1, 1, 1))
# default extrusion is (0, 0, 1), therefore scale(2, 2, ..) is a uniform scaling in the xy-play of the OCS
circle.transform(m)
assert circle.dxf.center == (5, 7, 13)
assert circle.dxf.extrusion == (0, 0, 1)
assert circle.dxf.thickness == 6
def test_circle_to_code():
from ezdxf.entities.circle import Circle
entity = Circle.new(handle='ABBA', owner='0', dxfattribs={
'color': '7',
'center': (1, 2, 3),
'radius': 2,
})
new_entity = translate_to_code_and_execute(entity)
for name in ('color', 'center', 'radius'):
assert new_entity.get_dxf_attrib(name) == entity.get_dxf_attrib(name)
def test_circle_non_uniform_scaling():
circle = Circle.new(dxfattribs={'center': (2, 3, 4), 'extrusion': (0, 1, 0),
'thickness': 2})
# extrusion in WCS y-axis, therefore scale(2, ..., 3) is a non uniform
# scaling in the xy-play of the OCS which is the xz-plane of the WCS
with pytest.raises(NonUniformScalingError):
circle.transform(Matrix44.scale(2, 2, 3))
# source values unchanged after exception
assert circle.dxf.center == (2, 3, 4)
assert circle.dxf.extrusion == (0, 1, 0)
assert circle.dxf.thickness == 2
def test_circle_to_code():
from ezdxf.entities.circle import Circle
entity = Circle.new(
handle="ABBA",
owner="0",
dxfattribs={
"color": "7",
"center": (1, 2, 3),
"radius": 2,
},
)
new_entity = translate_to_code_and_execute(entity)
for name in ("color", "center", "radius"):
assert new_entity.get_dxf_attrib(name) == entity.get_dxf_attrib(name)
def test_circle_user_ocs():
center = (2, 3, 4)
extrusion = (0, 1, 0)
circle = Circle.new(
dxfattribs={'center': center, 'extrusion': extrusion, 'thickness': 2})
ocs = OCS(extrusion)
v = ocs.to_wcs(center) # (-2, 4, 3)
v = Vector(v.x * 2, v.y * 4, v.z * 2)
v += (1, 1, 1)
# and back to OCS, extrusion is unchanged
result = ocs.from_wcs(v)
m = Matrix44.chain(Matrix44.scale(2, 4, 2), Matrix44.translate(1, 1, 1))
circle.transform(m)
assert circle.dxf.center == result
assert circle.dxf.extrusion == (0, 1, 0)
assert circle.dxf.thickness == 8 # in WCS y-axis
def test_extrusion_can_not_be_a_null_vector():
circle = Circle.new(dxfattribs={'extrusion': (0, 0, 0)})
assert circle.dxf.extrusion == (0, 0, 1), 'expected default extrusion'
def test_zero_radius():
circle = Circle.new(dxfattribs={'radius': 0})
assert circle.dxf.radius == 0, 'Radius == 0 is valid'
def test_negative_radius():
circle = Circle.new(dxfattribs={'radius': -1})
assert circle.dxf.radius == -1, 'Radius < 0 is valid'
def test_zero_radius():
circle = Circle.new(dxfattribs={"radius": 0})
assert circle.dxf.radius == 0, "Radius == 0 is valid"
def test_circle_flattening(radius, sagitta, count):
circle = Circle.new(dxfattribs={"radius": radius})
assert len(list(circle.flattening(sagitta))) == count
