def test_construct_camera(self):
hsize = 160
vsize = 120
field_of_view = pi / 2
c = Camera(hsize, vsize, field_of_view)
assert c.hsize == 160
assert c.vsize == 120
assert c.field_of_view == pi / 2
assert c.transformation == Matrix.identity()
def test_transpose_identity_matrix(self):
a = Matrix.identity().transpose()
assert a == Matrix.identity()
def test_multiply_identity_matrix_by_tuple(self):
a = Tuple(1, 2, 3, 4)
assert Matrix.identity() * a == a
def test_multiply_matrix_by_identity_matric(self):
a = Matrix([[0, 1, 2, 4], [1, 2, 4, 8], [2, 4, 8, 16], [4, 8, 16, 32]])
assert a * Matrix.identity() == a
def test_default_pattern_transformation(self):
pattern = test_pattern()
assert pattern.transformation == Matrix.identity()
def test_view_transformation_for_default_orientation(self):
_from = Point(0, 0, 0)
to = Point(0, 0, -1)
up = Vector(0, 1, 0)
t = view_transform(_from, to, up)
assert t == Matrix.identity()
