def test_unit_circle():
circle = shapes.unit_circle()
assert circle.has_curves
assert len(circle) == 4, "expected 4 cubic Bèzier segments"
assert circle.start.isclose((1, 0, 0))
assert circle.end.isclose((1, 0, 0))
def test_rotated_ellipse():
m = shapes.elliptic_transformation(ratio=0.5, rotation=math.pi / 2)
circle = shapes.unit_circle(transform=m)
extends = bbox([circle])
assert extends.extmin.isclose((-0.5, -1.0))
assert extends.extmax.isclose((0.5, 1.0))
def test_move_circle():
m = shapes.elliptic_transformation(center=(-1, 0, 0))
circle = shapes.unit_circle(transform=m)
assert circle.start.isclose((0, 0, 0))
def test_ellipse():
m = shapes.elliptic_transformation(ratio=0.5)
circle = shapes.unit_circle(transform=m)
extends = bbox([circle])
assert extends.extmin.isclose((-1.0, -0.5))
assert extends.extmax.isclose((1.0, 0.5))
def test_scale_circle():
m = shapes.elliptic_transformation(radius=2)
circle = shapes.unit_circle(transform=m)
assert circle.start.isclose((2, 0, 0))