def direction(self, value):
self._direction = umath.norm_vec(umath.nparray(value))
def vertex(self, value):
self._vertex = umath.nparray(value)
def point(self, value):
self._point = umath.nparray(value)
def __init__(self, point, normal):
self.point = umath.nparray(point)
self.normal = umath.norm_vec(umath.nparray(normal))
