bline_point.set_tangent2(bline_point.get_tangent1());
bline_point.set_split_tangent_flag(false);
bline_point.set_origin(origin);
bline_point.set_tangent2(bline_point.get_tangent1());
bline_point.set_split_tangent_flag(false);
bline_point.set_origin(origin);