UF创建直纹面函数

　　　/// <summary>
        /// 通过两条曲线创建直纹面
        /// </summary>
        /// <param name="curve1"></param>
        /// <param name="curve2"></param>
        /// <returns></returns>
        private Tag CreateRuled(Tag curve1, Tag curve2)
        {
            StringList s_section = new StringList();
            theUFSession.Modl.InitStringList(ref s_section);
            int aligment = 1;
            double[] value = new double[6];
            int end_point = 0;
            int body_type = 0;
            FeatureSigns boolean = FeatureSigns.Nullsign;
            double[] tol = new double[3] { 0.001, 0.001, 0.001 };
            Tag body_obj_id;
            theUFSession.Modl.CreateStringList(2, 2, ref s_section);
            s_section.num = 2;
            s_section._string[0] = 1;
            s_section._string[1] = 1;
            s_section.dir[0] = 1;
            s_section.dir[1] = -1;  //反方向
            s_section.id[0] = curve1;
            s_section.id[1] = curve2;
            StringList s_spine = new StringList();
            theUFSession.Modl.InitStringList(ref s_spine);
            s_spine.num = 0;
            Session theSession = Session.GetSession();
            //设置生成的自由曲面为B曲面
            theSession.Preferences.Modeling.FreeFormConstructionResult =
                NXOpen.Preferences.SessionModeling.FreeFormConstructionResultType.BSurface;
            theUFSession.Modl.CreateRuled(ref s_section, ref s_spine, ref aligment, value, ref end_point,
            ref body_type, boolean, tol, out body_obj_id);
            //设置生成的自由曲面为默认值
            theSession.Preferences.Modeling.FreeFormConstructionResult =
                NXOpen.Preferences.SessionModeling.FreeFormConstructionResultType.Plane;
            return body_obj_id;
        }