如何快速选择与一条多段线相交的线？

just_joke · 发表于 2011-9-24 10:23:00

我想选择出某一图层中与一条多段线相交的多段线或二维多段线，该怎么写选择条件呢？
   我现在的方法是：
         Database db = HostApplicationServices.WorkingDatabase;
         Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
         TypedValue value1 = new TypedValue((int)DxfCode.Start, "*PolyLine");
         TypedValue value2 = new TypedValue((int)DxfCode.LayerName, Layername);
         TypedValue[] values = { value1, value2 };
         SelectionFilter sfilter = new SelectionFilter(values);
         PromptSelectionResult resSel = ed.SelectAll(sfilter);
         SelectionSet sSet = resSel.Value;
         ObjectId[] ids = sSet.GetObjectIds();
         Polyline polylineTemp = new Polyline(2);
         polylineTemp.AddVertexAt(0, p1, 0, 0, 0);
         polylineTemp.AddVertexAt(1, p2, 0, 0, 0);
         using (Transaction trans = db.TransactionManager.StartTransaction())
         {
            foreach(ObjectId sSetEntId in ids)
            {
                  Entity myEntity = (Entity)trans.GetObject(sSetEntId, OpenMode.ForRead);
                  if ((myEntity is Polyline) || (myEntity is Polyline2d))
                  {
                        //这里做myEntity 与polylineTemp 是否有交点的判断
                  }
            }
            trans.commit();
         }

zoubo604 · 发表于 2011-9-24 12:43:00

系统自带的EXPREES tools工具
不是有FS命令吗

hhhwjb · 发表于 2011-9-24 15:01:00

用SelectFence

chengw · 发表于 2011-9-26 14:29:00

Database db = HostApplicationServices.WorkingDatabase;
         Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
         Entity entity = null;
         DBObjectCollection dbCollection = new DBObjectCollection();
         TypedValue [] type=new  TypedValue[2];
            type[0] = new TypedValue((int)DxfCode.Start, "*PolyLine");
         type[1] = new TypedValue((int)DxfCode.LayerName, layerName);
         // 表示得到所有与多边形相交的对象，并且该对象所在layerName层的曲线
   PromptSelectionResult ents = ed.SelectFence(pts,filter);  //pts要相交的多段线的合
      if (ents.Status == PromptStatus.OK)
         {
            SelectionSet ss = ents.Value;
            using (Transaction tran = db.TransactionManager.StartOpenCloseTransaction())
            {
                  foreach (ObjectId id in ss.GetObjectIds())
                  {
                     entity = tran.GetObject(id, OpenMode.ForWrite, true) as Entity;
                     if (entity != null)
                     {
                        dbCollection.Add(entity); //得到的对象放入集合中
                        }
                     tran.Commit();
                  }
            }
         }
希望能帮到你。。

ctgu123 · 发表于 2012-7-23 11:47:00

请问pts怎么定义啊~

如何快速选择与一条多段线相交的线？

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