def _get_all_miller_e(self):
        """
        from self:
            get miller_list(unique_miller), e_surf_list and symmetry
            operations(symmops) according to lattice
        apply symmops to get all the miller index, then get normal,
        get all the facets functions for wulff shape calculation:
            |normal| = 1, e_surf is plane's distance to (0, 0, 0),
            normal[0]x + normal[1]y + normal[2]z = e_surf

        return:
            [WulffFacet]
        """
        all_hkl = []
        color_ind = self.color_ind
        planes = []
        recp = self.structure.lattice.reciprocal_lattice_crystallographic
        recp_symmops = get_recp_symmetry_operation(self.structure, self.symprec)

        for i, (hkl, energy) in enumerate(zip(self.hkl_list,
                                              self.e_surf_list)):
            for op in recp_symmops:
                miller = tuple([int(x) for x in op.operate(hkl)])
                if miller not in all_hkl:
                    all_hkl.append(miller)
                    normal = recp.get_cartesian_coords(miller)
                    normal /= sp.linalg.norm(normal)
                    normal_pt = [x * energy for x in normal]
                    dual_pt = [x / energy for x in normal]
                    color_plane = color_ind[divmod(i, len(color_ind))[1]]
                    planes.append(WulffFacet(normal, energy, normal_pt,
                                             dual_pt, color_plane, i, hkl))

        # sort by e_surf
        planes.sort(key=lambda x: x.e_surf)
        return planes