OPM自定义hvac round damper

如图所示，1是OPM CE up7自带的HVAC Round Damper，放置在Round Duct上可以自动打断，2是我自己模仿1写的，但是无法自动打断，下面是C#脚本代码

public override void Setup()
        {
            if (!this._initialized)
            {
                this._initialized = true;
            }
            base.Setup();
            this.mainPort = (this._ports[0] as RoundGasPort);
            if (this._ports.Count > 1)
            {
                this.runPort = (this._ports[1] as RoundGasPort);
            }
            this.maindiameter = this._bmECObject.Instance["MAIN_DIAMETER"].DoubleValue; // DN
            this.length = this._bmECObject.Instance["LENGTH"].DoubleValue; // 长度
            this.runDiameter = this.maindiameter;
            this.damperdiameter = this._bmECObject.Instance["DIAMETER1"].DoubleValue; // 大于DN，用于计算厚度
            this.bladeDiameter = this._bmECObject.Instance["BLADE_DIAMETER"].DoubleValue; // 大于DIAMETER1，用于计算两边片的厚度
            this.height = this._bmECObject.Instance["HEIGHT"].DoubleValue;
            this.bladeLength = this._bmECObject.Instance["BLADE_LENGTH"].DoubleValue;
            this.L1 = this._bmECObject.Instance["L1"].DoubleValue;
            this.L2 = this._bmECObject.Instance["L2"].DoubleValue;
            this.L3 = this._bmECObject.Instance["L3"].DoubleValue;
            this.L4 = this._bmECObject.Instance["L4"].DoubleValue;
            if (this.maindiameter > this.damperdiameter)
            {
                this._bmECObject.Instance["MAIN_DIAMETER"].DoubleValue = this.damperdiameter;
                this.maindiameter = this.damperdiameter;
            }
            if (this.damperdiameter > this.bladeDiameter)
            {
                this._bmECObject.Instance["BLADE_DIAMETER"].DoubleValue = this.damperdiameter;
                this.bladeDiameter = this.damperdiameter;

            }
            DVector3d orientation = DVector3d.FromXYZ(0.0, 0.0, 1.0);
            if (this.mainPort != null)
            {
                this.mainPort.LocationInMM = DPoint3d.FromXYZ(this.bladeLength, 0.0, 0.0);
                this.mainPort.Orientation = orientation;
                this.mainPort.Direction = DVector3d.FromXYZ(-1.0, 0.0, 0.0);
                this.mainPort.DiameterInMM = this.maindiameter;
                PlacementPoint placementPoint = new PlacementPoint(this.mainPort);
                placementPoint.IsPort = true;
                this._placementPoints.Add(placementPoint);
            }
            if (this.runPort != null)
            {
                this.runPort.LocationInMM = DPoint3d.FromXYZ(this.length + bladeLength, 0.0, 0.0);
                this.runPort.Orientation = orientation;
                this.runPort.Direction = DVector3d.FromXYZ(1.0, 0.0, 0.0);
                this.runPort.DiameterInMM = this.runDiameter;
                PlacementPoint placementPoint = new PlacementPoint(this.runPort);
                placementPoint.IsPort = true;
                this._placementPoints.Add(placementPoint);
            }
        }

        public List<ElementHolder> CreateCenterLine()
        {
            List<ElementHolder> list = new List<ElementHolder>();
            list.Add(this._app.CreateLineElement(this._ports[0].LocationInMM, this._ports[1].LocationInMM));
            if (list != null)
            {
                base.SetTypeAndSymbology(ref list, BMdGraphicsType.bmdGraphicsTypeCenterline);
            }
            return list;
        }

        public BMGatheredElement CreateDamperBody(
            double bodydiameter,
            double length
            )
        {
            BMGatheredElement bMGatheredElement = this._app.CreateGatheredElement();
            BMechEndData bMechEndData = new BMechEndData();
            bMechEndData.WidthInMM = bodydiameter;
            bMechEndData.DepthInMM = bodydiameter;
            bMechEndData.Shape = BMdEndShape.bmdRound;
            BMechEndData bMechEndData2 = new BMechEndData();
            bMechEndData2.WidthInMM = this.maindiameter;
            bMechEndData2.DepthInMM = this.maindiameter;
            bMechEndData2.Shape = BMdEndShape.bmdRound;
            bMGatheredElement.Cursor.Initialize();

            if (bodydiameter != this.maindiameter)
            {
                bMGatheredElement.AddDifference(bMechEndData, bMechEndData2, DPoint3d.Zero, BMdComponentType.bmdComponentTypeBody, BMdGraphicsType.bmdGraphicsTypeEdge);
            }

            bMGatheredElement.AddSurface(bMechEndData2, bMechEndData2, DPoint3d.Zero,
                BMdGraphicsType.bmdGraphicsTypeEdge, BMdComponentType.bmdComponentTypeBody, length, (bodydiameter - this.maindiameter) / 2);
            return bMGatheredElement;
        }

        public override List<ElementHolder> Create3DElements()
        {
            List<ElementHolder> list = new List<ElementHolder>();
            try
            {
                this.Setup();
                BMGatheredElement bMGatheredElement = this.CreateDamperBody(this.bladeDiameter, this.bladeLength);
                list.Add(bMGatheredElement.Create());

                BMGatheredElement bMGatheredElement2 = this.CreateDamperBody(this.damperdiameter, this.length + this.bladeLength);
                list.Add(bMGatheredElement2.Create());

                BMGatheredElement bMGatheredElement3 = this.CreateDamperBody(this.bladeDiameter, this.bladeLength);

                ElementHolder elementHolder = bMGatheredElement3.Create();
                DTransform3d transform = DTransform3d.Identity;
                EulerAngles euler = EulerAngles.FromDegrees(0, 0, 0);
                transform.Matrix = DMatrix3d.FromEulerAngles(euler);
                transform.Translation = new DVector3d(this.length + this.bladeLength, 0, 0);
                elementHolder.Transform(transform, false);

                list.Add(elementHolder);

                base.SetTypeAndSymbology(ref list, BMdGraphicsType.bmdGraphicsTypeEdge);
               
                list.AddRange(base.CreateHvacEndPreps());
                list.AddRange(this.CreateCenterLine());
            }
            catch (Exception)
            {
                
            }
            return list;
        }

ecclass配置