lattice.py 文件源码

def angles(self):
        """
        Returns the angles (alpha, beta, gamma) of the lattice.
        """
        if self._angles is None:
            # Angles
            angles = np.zeros(3)
            for i in range(3):
                j = (i + 1) % 3
                k = (i + 2) % 3
                angles[i] = np.dot(
                    self._matrix[j],
                    self._matrix[k]) / (self.lengths[j] * self.lengths[k])
            angles = np.clip(angles, -1.0, 1.0)
            self._angles = np.arccos(angles) * 180. / np.pi
        return self._angles