C#中绘制3D模型的方法——面面拉伸

      //初始化面容器
            List<CurveVector> curves = new List<CurveVector>();
            //初始化点容器并定义连接点
            List<DPoint3d> points1 = new List<DPoint3d>() { pnt1, pnt2, pnt3, pnt4, pnt5, pnt6, pnt7, pnt8 };
            List<DPoint3d> points2 = new List<DPoint3d>() { pnt1_, pnt2_, pnt3_, pnt4_, pnt5_, pnt6_, pnt7_, pnt8_ };
            //根据连接点绘制第一个面
            CurveVector curve1 = CurveVector.CreateLinear(points1, CurveVector.BoundaryType.Outer, false);
            //根据连接点绘制第二个面
            CurveVector curve2 = CurveVector.CreateLinear(points2, CurveVector.BoundaryType.Outer, false);
            //将绘制的面放到面容器里
            curves.Add(curve1);
            curves.Add(curve2);
            //转换为拉伸工具需要的类型
            DgnRuledSweepDetail date = new DgnRuledSweepDetail(curves, true);
            //拉伸形体
            SolidPrimitive sweepsolid = SolidPrimitive.CreateDgnRuledSweep(date);
            //将类型转化为Element
            Bentley.DgnPlatformNET.Elements.Element sweepelement = Bentley.DgnPlatformNET.Elements.DraftingElementSchema.ToElement(Bentley.MstnPlatformNET.Session.Instance.GetActiveDgnModel(), sweepsolid, null);

            //将element类型转化为elementholder
            //elementholder sweepelementholder = jyx_zyjc_clr.publicmethod.converttoelementholder(sweepelement.elementhandle);

            //holder.add(sweepelementholder);//添加形体


//拉伸
         public static IntPtr CreateExtrudeBody(ulong elemid, double distance, DVector3d vector);
            //底座3-3
            System.IntPtr intPtr1 = MyPrac.CreateExtrudeBody((ulong)culvertShape.ElementId, L1, dv_x);
            Element temp1 = Element.GetFromElementRef(intPtr1);