curve.first.set_rs(iter->get_time(), next->get_time());
curve.first.p1()=iter->get_time();
curve.first.p2()=next->get_time();
curve.first.set_rs(iter->get_time(), next->get_time());
curve.first.p1()=iter->get_time();
curve.first.p2()=next->get_time();