def __init__(self,
s=np.array([0, 0, 0]),
v=np.array([0, 0, 1]),
t=np.arange(0, 10, 1)):
self._s = s
self._v = v
self._t = t
self._light = Math.vector_trans(s) + Math.dot(t, v)
def __set_light(self):
self._light = Math.vector_trans(self._s)+Math.dot(self._t, self._v)
