Revit二次开发----分割族

**如有不明白，请qq254033230询问。**

其实在revit里是不存在分割族的概念。

对于基于线形的族，截面沿线都是一样，要想达到分割的状态，只需要把族基于线的那条线变短，然后再在分割点复制一个新的族即可。

过程是先获得线的均分点，然后把族的线缩短，接着再复制族，即可变成均分的效果。主要方法见代码:

private void DevideFamilyInstance(FamilyInstance famIns,int n, Document revitDoc)
        {
            LocationCurve locationCurve = famIns.Location as LocationCurve;
            XYZ stratPoint = locationCurve.Curve.GetEndPoint(0);
            XYZ endPoint = locationCurve.Curve.GetEndPoint(1);

            IList<XYZ> devidePoint = InsertPoint(stratPoint, endPoint,n);

            Transaction transaction = new Transaction(revitDoc);
            transaction.Start("将族复制到相应位置");
            locationCurve.Curve = Line.CreateBound(stratPoint, devidePoint[0]);
            List<ElementId> list = new List<ElementId>();
            list.Add(famIns.Id);
            ICollection<ElementId> elementIds = list;
            for (int j=1;j<n;j++)
            {
                XYZ tanslation = new XYZ(devidePoint[j - 1].X - stratPoint.X, devidePoint[j - 1].Y - stratPoint.Y, devidePoint[j - 1].Z - stratPoint.Z);     
                ElementTransformUtils.CopyElements(revitDoc, elementIds, tanslation);
                
            }
            transaction.Commit();


        }
        private List<XYZ> InsertPoint(XYZ stratPoint, XYZ endPoint,int n)
        {
            List<XYZ> listPoint = new List<XYZ>();
            double x, y, z;
            for(int i=1;i<n;i++)
            {
                x = stratPoint.X+(endPoint.X- stratPoint.X)*i/n;
                y = stratPoint.Y + (endPoint.Y - stratPoint.Y) * i / n;
                z= stratPoint.Z + (endPoint.Z - stratPoint.Z) * i / n;
                XYZ point = new XYZ(x,y,z);
                listPoint.Add(point);
            }