【UG\NX二次开发】UF 光顺样条曲线（UF_CURVE_smooth_spline_data）

bool smoothSpline(tag_t from_spline, double tol_dist, double tol_angel, tag_t* smoothed_spline)
{
	UF_UNDO_mark_id_t  mark_id;
	try
	{
		UF_UNDO_set_mark(UF_UNDO_visible, NULL, &mark_id);
		UF_CURVE_spline_t spline_data;
		int num_states;
		UF_CURVE_state_t* states;
		int num_states2;
		UF_CURVE_state_t* states2 = NULL;
		int error = 0;

		*smoothed_spline = NULL_TAG;
		UF_CALL(UF_CURVE_ask_spline_data(from_spline, &spline_data));
		UF_CALL(error = UF_CURVE_smooth_spline_data(&spline_data, spline_data.order - 2, tol_dist, tol_angel, &num_states, &states));
		if (states) { UF_free(states); }
		if (error) { return 0; }

		UF_CALL(error = UF_CURVE_create_spline(&spline_data, smoothed_spline, &num_states2, &states2));
		UF_free(spline_data.knots);
		UF_free(spline_data.poles);
		if (states2) { UF_free(states2); }
		if (error) { return 0; }

		if (*smoothed_spline) { return 1; }

		return 1;
	}
	catch (exception& ex)
	{
		UF_CALL(UF_UNDO_undo_to_mark(mark_id, NULL));
		return 0;
	}
}