GetVector.cs

    public Quaternion GetVector()
    {
        Quaternion q = Quaternion.AngleAxis( 90.0f, Vector3.right );
        Vector3 v1 = q * new Vector3(j_b.x, i_b.x, k_b.x);
        Vector3 v2 = q * -(new Vector3(j_b.z, i_b.z, k_b.z));
        if (v2 != Vector3.zero){
		    return Quaternion.LookRotation(v1, v2);
        }else{
            return Quaternion.identity;
        }
    }