BaseMesh.py 文件源码

def normals(self):
        """Face Normals

        :rtype: numpy.array
        :return: normals, (sum(nF), dim)
        """
        if self.dim == 2:
            nX = np.c_[
                np.ones(self.nFx), np.zeros(self.nFx)
            ]
            nY = np.c_[
                np.zeros(self.nFy), np.ones(self.nFy)
            ]
            return np.r_[nX, nY]
        elif self.dim == 3:
            nX = np.c_[
                np.ones(self.nFx), np.zeros(self.nFx), np.zeros(self.nFx)
            ]
            nY = np.c_[
                np.zeros(self.nFy), np.ones(self.nFy), np.zeros(self.nFy)
            ]
            nZ = np.c_[
                np.zeros(self.nFz), np.zeros(self.nFz), np.ones(self.nFz)
            ]
            return np.r_[nX, nY, nZ]