def test_vec_point_multiplication(self):
m = Transformation(
m=[
[1.0, 2.0, 3.0, 4.0],
[5.0, 6.0, 7.0, 8.0],
[9.0, 9.0, 8.0, 7.0],
[0.0, 0.0, 0.0, 1.0],
],
invm=[
[-3.75, 2.75, -1, 0],
[5.75, -4.75, 2.0, 1.0],
[-2.25, 2.25, -1.0, -2.0],
[0.0, 0.0, 0.0, 1.0],
],
)
assert m.is_consistent()
expected_v = Vec(14.0, 38.0, 51.0)
assert expected_v.is_close(m * Vec(1.0, 2.0, 3.0))
expected_p = Point(18.0, 46.0, 58.0)
assert expected_p.is_close(m * Point(1.0, 2.0, 3.0))
expected_n = Normal(-8.75, 7.75, -3.0)
assert expected_n.is_close(m * Normal(3.0, 2.0, 4.0))
def test_vectors(self):
a = Vec(1.0, 2.0, 3.0)
b = Vec(4.0, 6.0, 8.0)
assert a.is_close(a)
assert not a.is_close(b)