'(staticmethod) Create a new transformation matrix as a 3x3
numpy array of the form::
a c e
b d f
0 0 1'

@staticmethod
def matrix_from_values(a, b, c, d, e, f):

    return np.array([[a, c, e], [b, d, f], [0.0, 0.0, 1.0]], float)
