def test_arc_from_2p_radius():
p1 = (2, 1)
p2 = (0, 3)
radius = 2
arc = ConstructionArc.from_2p_radius(start_point=p1, end_point=p2,
radius=radius)
assert arc.center == (0, 1)
assert isclose(arc.radius, radius)
assert isclose(arc.start_angle, 0)
assert isclose(arc.end_angle, 90)
arc = ConstructionArc.from_2p_radius(start_point=p2, end_point=p1,
radius=radius)
assert arc.center == Vector(2, 3)
assert isclose(arc.radius, radius)
assert isclose(arc.start_angle, 180)
assert isclose(arc.end_angle, -90)
arc.add_to_layout(modelspace, ucs, dxfattribs={'color': 1}) # red arc
arc = ConstructionArc.from_3p(end_point_ucs, start_point_ucs, def_point_ucs)
arc.add_to_layout(modelspace, ucs, dxfattribs={'color': 2}) # yellow arc
p1 = Vec3(0, -18)
p2 = Vec3(0, +18)
arc = ConstructionArc.from_2p_angle(p1, p2, 90)
arc.add_to_layout(modelspace, dxfattribs={'color': 1})
arc = ConstructionArc.from_2p_angle(p1, p2, 90, ccw=False)
arc.add_to_layout(modelspace, dxfattribs={'color': 2})
p1 = Vec3(20, -18)
p2 = Vec3(20, +18)
arc = ConstructionArc.from_2p_radius(p1, p2, 100)
arc.add_to_layout(modelspace, dxfattribs={'color': 1})
arc = ConstructionArc.from_2p_radius(p1, p2, 100, ccw=False)
arc.add_to_layout(modelspace, dxfattribs={'color': 2})
arc = ConstructionArc.from_2p_radius(p1, p2, 100, center_is_left=False)
arc.add_to_layout(modelspace, dxfattribs={'color': 3})
arc = ConstructionArc.from_2p_radius(p1,
p2,
100,
ccw=False,
center_is_left=False)
arc.add_to_layout(modelspace, dxfattribs={'color': 4})