Function cartesian_to_reciprocal

python/geom.py:1603–1609

(x, lat)

def cartesian_to_reciprocal(x, lat):
    s = Vector3(*[1 if v == 0 else v for v in lat.size])

    m = Matrix(Vector3(s.x), Vector3(y=s.y), Vector3(z=s.z))
    Rst = (lat.basis * m).transpose()

    return Rst * x if isinstance(x, Vector3) else (Rst * x) * Rst.inverse()


def lattice_to_reciprocal(x, lat):