def test_arc_from_2p_angle_simple():
p1 = (2, 1)
p2 = (0, 3)
angle = 90
arc = ConstructionArc.from_2p_angle(start_point=p1, end_point=p2,
angle=angle)
assert arc.center == (0, 1)
assert isclose(arc.radius, 2)
assert isclose(arc.start_angle, 0, abs_tol=1e-12)
assert isclose(arc.end_angle, 90)
arc = ConstructionArc.from_2p_angle(start_point=p2, end_point=p1,
angle=angle)
assert arc.center == (2, 3)
assert isclose(arc.radius, 2)
assert isclose(arc.start_angle, 180)
assert isclose(arc.end_angle, -90)
def test_arc_from_2p_angle_complex():
p1 = (-15.73335, 10.98719)
p2 = (-12.67722, 8.76554)
angle = 55.247230
arc = ConstructionArc.from_2p_angle(start_point=p1, end_point=p2,
angle=angle)
arc_result = ConstructionArc(
center=(-12.08260, 12.79635),
radius=4.07443,
start_angle=-153.638906,
end_angle=-98.391676,
)
assert arc.center.isclose(arc_result.center, abs_tol=1e-5)
assert isclose(arc.radius, arc_result.radius, abs_tol=1e-5)
assert isclose(arc.start_angle, arc_result.start_angle, abs_tol=1e-4)
assert isclose(arc.end_angle, arc_result.end_angle, abs_tol=1e-4)
axis=start_point_wcs - def_point_wcs,
point=end_point_wcs)
start_point_ucs = ucs.from_wcs(start_point_wcs)
end_point_ucs = ucs.from_wcs(end_point_wcs)
def_point_ucs = Vec3(0, 0) # origin of UCS
# create arc in the xy-plane of the UCS
arc = ConstructionArc.from_3p(start_point_ucs, end_point_ucs, def_point_ucs)
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})