def test_scaling_a_ray():
origin = point(1, 2, 3)
direction = vector(0, 1, 0)
r = Ray(origin, direction)
m = transformations.scaling(2, 3, 4)
scaled_ray = r.transform(m)
assert (np.allclose(point(2, 6, 12), scaled_ray.origin))
assert (np.allclose(vector(0, 3, 0), scaled_ray.direction))
def test_translating_a_ray():
origin = point(1, 2, 3)
direction = vector(0, 1, 0)
r = Ray(origin, direction)
m = transformations.translation(3, 4, 5)
translated_ray = r.transform(m)
assert (np.allclose(point(4, 6, 8), translated_ray.origin))
assert (np.allclose(vector(0, 1, 0), translated_ray.direction))