def test_circle_flattening(r, s, e, sagitta, count):
arc = Arc.new(dxfattribs={
'radius': r,
'start_angle': s,
'end_angle': e,
})
assert len(list(arc.flattening(sagitta))) == count
def test_from_arc():
from ezdxf.entities.arc import Arc
arc = Arc.new(dxfattribs={'center': (2, 2, 2), 'radius': 3})
ellipse = Ellipse.from_arc(arc)
assert ellipse.dxf.center == (2, 2, 2)
assert ellipse.dxf.major_axis == (3, 0, 0)
assert ellipse.dxf.ratio == 1
assert ellipse.dxf.start_param == 0
assert math.isclose(ellipse.dxf.end_param, math.pi * 2)
def test_arc_to_code():
from ezdxf.entities.arc import Arc
entity = Arc.new(handle='ABBA', owner='0', dxfattribs={
'color': '7',
'center': (1, 2, 3),
'radius': 2,
'start_angle': 30,
'end_angle': 60,
})
new_entity = translate_to_code_and_execute(entity)
for name in ('color', 'center', 'radius', 'start_angle', 'end_angle'):
assert new_entity.get_dxf_attrib(name) == entity.get_dxf_attrib(name)
def test_angles():
arc = Arc.new(dxfattribs={'radius': 1, 'start_angle': 30, 'end_angle': 60})
assert tuple(arc.angles(2)) == (30, 60)
assert tuple(arc.angles(3)) == (30, 45, 60)
arc.dxf.start_angle = 180
arc.dxf.end_angle = 0
assert tuple(arc.angles(2)) == (180, 0)
assert tuple(arc.angles(3)) == (180, 270, 0)
arc.dxf.start_angle = -90
arc.dxf.end_angle = -180
assert tuple(arc.angles(2)) == (270, 180)
assert tuple(arc.angles(4)) == (270, 0, 90, 180)
def test_arc_default_ocs():
arc = Arc.new(dxfattribs={'center': (2, 3, 4), 'thickness': 2, 'start_angle': 30, 'end_angle': 60})
# 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
arc.transform(m)
assert arc.dxf.center == (5, 7, 13)
assert arc.dxf.extrusion == (0, 0, 1)
assert arc.dxf.thickness == 6
assert math.isclose(arc.dxf.start_angle, 30, abs_tol=1e-9)
assert math.isclose(arc.dxf.end_angle, 60, abs_tol=1e-9)
arc.transform(Matrix44.z_rotate(math.radians(30)))
assert math.isclose(arc.dxf.start_angle, 60, abs_tol=1e-9)
assert math.isclose(arc.dxf.end_angle, 90, abs_tol=1e-9)
def test_arc_to_code():
from ezdxf.entities.arc import Arc
entity = Arc.new(
handle="ABBA",
owner="0",
dxfattribs={
"color": "7",
"center": (1, 2, 3),
"radius": 2,
"start_angle": 30,
"end_angle": 60,
},
)
new_entity = translate_to_code_and_execute(entity)
for name in ("color", "center", "radius", "start_angle", "end_angle"):
assert new_entity.get_dxf_attrib(name) == entity.get_dxf_attrib(name)