using GrxCAD.ApplicationServices;
using GrxCAD.DatabaseServices;
using GrxCAD.EditorInput;
using GrxCAD.Geometry;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace HCTools
{
    class CutContourLine
    {
        public static string sqxlayer;
        public static string jqxlayer;
        public static int mapscale;
        public static double scalelen;
        public static double lenIgnore;
        public static double eledvalue;
        public void ccls()
        {
            DocumentLock documentlock = GrxCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument();
            Document doc = GrxCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            //类全局变量
            //存储地图图层
            //System.Collections.ArrayList layerlist = new System.Collections.ArrayList();
            LayerTable layertable = null;
            bool openflag = true;
            List<Entity> plentitycollection = new List<Entity>();
            List<Entity> plentitycollection1 = new List<Entity>();
            //保存裁剪掉的等高线
            List<Entity> cdentity = new List<Entity>();


            #region//第一个事务 获取计曲线
            using (Transaction tran = doc.TransactionManager.StartTransaction())
            {
                
                //layertable = tran.GetObject(db.LayerTableId, OpenMode.ForRead) as LayerTable;
                ////获取图层
                //foreach (ObjectId id in layertable)
                //{
                //    DocumentLock docLock = GrxCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument();
                //    LayerTableRecord lyrtbrec = tran.GetObject(id, OpenMode.ForWrite) as LayerTableRecord;
                //    docLock.Dispose();
                //    layerlist.Add(lyrtbrec.Name);
                    
                //}

                //CLSelectForm clsf = new CLSelectForm(layerlist);
                //if (clsf.ShowDialog() == DialogResult.OK)
                //{
                //    openflag = true;
                //    mapscale = clsf.mapscale;
                //    sqxlayer = clsf.SQX;
                //    jqxlayer = clsf.JQX;
                //    scalelen = clsf.ScaleLength;
                //    lenIgnore = clsf.LenIgnore;
                //    eledvalue = clsf.EleDValue;
                //}


                if (openflag == true)
                {
                    ///带1的为首曲线过滤，没有的是计曲线过滤
                    TypedValue[] tv = new TypedValue[1];
                    TypedValue[] tv1 = new TypedValue[1];
                    tv.SetValue(new TypedValue((int)DxfCode.LayerName, jqxlayer), 0);
                    tv1.SetValue(new TypedValue((int)DxfCode.LayerName, sqxlayer), 0);
                    SelectionFilter sf = new SelectionFilter(tv);
                    SelectionFilter sf1 = new SelectionFilter(tv1);
                    //doc.Editor.WriteMessage("请选择计曲线！");

                    //PromptSelectionResult psr = doc.Editor.GetSelection(sf);
                    PromptSelectionResult psr = doc.Editor.SelectAll(sf);
                    PromptSelectionResult psr1 = doc.Editor.SelectAll(sf1);

                    if (psr.Status == PromptStatus.OK && psr1.Status == PromptStatus.OK)
                    {
                        //// 以只读方式打开块表记录   Open the Block table record for read
                        BlockTable acbt = tran.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
                        //// 以写方式打开模型空间块表记录   Open the Block table record Model space for write
                        BlockTableRecord acblr = tran.GetObject(acbt[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;
                        SelectionSet ss = psr.Value;
                        //// 以只读方式打开块表记录   Open the Block table record for read
                        SelectionSet ss1 = psr1.Value;


                        foreach (ObjectId idpl in ss.GetObjectIds())
                        {
                            Entity enpl = tran.GetObject(idpl, OpenMode.ForWrite, true) as Entity;
                            if (enpl is Polyline)
                            {
                                Polyline pl = enpl as Polyline;
                                if (pl.Elevation != 0)
                                {
                                    plentitycollection.Add(enpl);
                                }
                            }
                            else if (enpl is Polyline2d)
                            {
                                Polyline2d pl2d = enpl as Polyline2d;
                                if (pl2d.Elevation != 0)
                                {
                                    plentitycollection.Add(enpl);
                                }
                            }
                        }
                        foreach (ObjectId idp2 in ss1.GetObjectIds())
                        {
                            Entity enp2 = tran.GetObject(idp2, OpenMode.ForWrite, true) as Entity;
                            if (enp2 is Polyline)
                            {
                                Polyline pl = enp2 as Polyline;
                                if (pl.Elevation != 0)
                                {
                                    plentitycollection1.Add(enp2);
                                }
                            }
                            else if (enp2 is Polyline2d)
                            {
                                Polyline2d pl2d = enp2 as Polyline2d;
                                if (pl2d.Elevation != 0)
                                {
                                    plentitycollection1.Add(enp2);
                                }
                            }
                        }
                    }
                    else
                        doc.Editor.WriteMessage("没有选择到任何实体\r\n");
                    //////////////////////////////这个气死我了 

                    doc.Editor.WriteMessage("程序开始运行\r\n.........\r\n......\r\n...\r\n");
                    tran.Commit();
                    tran.Dispose();
                }
                else
                {
                    MessageBox.Show("请选择相应的每一个参数！", "警告");
                    return;

                }
            }//end using
            #endregion

            #region//检查、裁剪等高线
            if (plentitycollection.Count > 0)
            {
                //根据高程将计曲线排序
                plentitycollection.Sort(CompareDGXByElevation);
                //删除重叠，重复的等高线
                //int count = RemoveOverlapPolyline(ref plentitycollection);

                ////////////////////方便调试 仅此而已
                //List<Polyline2d> test = new List<Polyline2d>();
                //foreach (Entity en in plentitycollection)
                //{
                //    Polyline2d pl = en as Polyline2d;
                //    if (pl != null)
                //        test.Add(pl);
                //}

                //List<Polyline> test00 = new List<Polyline>();
                //foreach (Entity en in plentitycollection)
                //{
                //    Polyline pl = en as Polyline;
                //    if (pl != null)
                //        test00.Add(pl);
                //}
                ///////////////////



                //以每条计曲线为循环变量
                for (int i = 0; i < plentitycollection.Count - 1; i++)
                {
                    Point3dCollection pt3dcoll = new Point3dCollection();

                    Entity en1 = plentitycollection[i];
                    double ele1 = 0;
                    Point2d pten1start = new Point2d();//
                    Point2d pten1end = new Point2d();//

                    if (en1 is Polyline)
                    {
                        Polyline pl = en1 as Polyline;
                        pten1start = new Point2d(pl.StartPoint.X, pl.StartPoint.Y);
                        pten1end = new Point2d(pl.EndPoint.X, pl.EndPoint.Y);

                        ele1 = Convert.ToDouble(pl.Elevation.ToString("f1"));
                        pl.GetStretchPoints(pt3dcoll);
                    }
                    else if (en1 is Polyline2d)
                    {
                        Polyline2d pl2d = en1 as Polyline2d;
                        pten1start = new Point2d(pl2d.StartPoint.X, pl2d.StartPoint.Y);
                        pten1end = new Point2d(pl2d.EndPoint.X, pl2d.EndPoint.Y);

                        ele1 = Convert.ToDouble(pl2d.Elevation.ToString("f1"));
                        pl2d.GetStretchPoints(pt3dcoll);
                    }

                    int j = 1;
                    Entity en2 = null;
                    double ele2 = 0, ele = 0;
                    Point2d pten2start = new Point2d();
                    Point2d pten2end = new Point2d();

                    double startlength = 9999999, endlength = 9999999;

                    //寻找一条等高线（计曲线）相邻的等高线
                    while (ele <= ele1 + eledvalue)
                    {
                        Entity entemp = plentitycollection[j];
                        if (entemp is Polyline)
                        {
                            Polyline pl = entemp as Polyline;
                            ele = Convert.ToDouble(pl.Elevation.ToString("f1"));

                            if (ele == ele1 + eledvalue)
                            {
                                pten2start = new Point2d(pl.StartPoint.X, pl.StartPoint.Y);
                                pten2end = new Point2d(pl.EndPoint.X, pl.EndPoint.Y);

                                double start = pten1start.GetDistanceTo(pten2start);
                                double end = pten1end.GetDistanceTo(pten2end);

                                //这段代码主要解决相邻有多条等高线时选择距离最近的
                                if (startlength > start && endlength > end)
                                {
                                    startlength = start;
                                    endlength = end;

                                    en2 = entemp;
                                    ele2 = ele;
                                }
                                else if (startlength > start)
                                {
                                    startlength = start;
                                    endlength = end;

                                    en2 = entemp;
                                    ele2 = ele;
                                }
                                else if (endlength > end)
                                {
                                    startlength = start;
                                    endlength = end;

                                    en2 = entemp;
                                    ele2 = ele;
                                }
                            }
                        }
                        else if (entemp is Polyline2d)
                        {
                            Polyline2d pl2d = entemp as Polyline2d;
                            ele = Convert.ToDouble(pl2d.Elevation.ToString("f1"));

                            if (ele == ele1 + eledvalue)
                            {
                                pten2start = new Point2d(pl2d.StartPoint.X, pl2d.StartPoint.Y);
                                pten2end = new Point2d(pl2d.EndPoint.X, pl2d.EndPoint.Y);

                                double start = pten1start.GetDistanceTo(pten2start);
                                double end = pten1end.GetDistanceTo(pten2end);

                                if (startlength > start && endlength > end)
                                {
                                    startlength = start;
                                    endlength = end;

                                    en2 = entemp;
                                    ele2 = ele;
                                }
                                else if (startlength > start)
                                {
                                    startlength = start;
                                    endlength = end;

                                    en2 = entemp;
                                    ele2 = ele;
                                }
                                else if (endlength > end)
                                {
                                    startlength = start;
                                    endlength = end;

                                    en2 = entemp;
                                    ele2 = ele;
                                }
                            }
                        }
                        j++;
                        if (j > plentitycollection.Count - 1)
                            break;
                    }

                    //满足裁剪条件的节点
                    Point3dCollection cjcoll = new Point3dCollection();
                    bool flag = false;

                    if (en2 != null)
                    {
                        //以计曲线节点为循环
                        for (int ii = 0; ii < pt3dcoll.Count; ii++)
                        {
                            Point3d pt3d = pt3dcoll[ii];

                            Point3d temppt3d = new Point3d();
                            temppt3d = GetClosestPoint(pt3d, en2);

                            //临时计算两个3d点之间的平面距离
                            Point2d pt2d1 = new Point2d(pt3d.X, pt3d.Y);
                            Point2d pt2d2 = new Point2d(temppt3d.X, temppt3d.Y);

                            double length = pt2d1.GetDistanceTo(pt2d2);
                            if (length < scalelen)
                            {
                                //flag为false标志继续添加满足条件节点
                                //flag为true标志结束添加节点，进行后续计算
                                
                                if (ii == pt3dcoll.Count - 1)//最后一组节点
                                {
                                    flag = true;
                                }
                                else 
                                {
                                    cjcoll.Add(pt3d);
                                    cjcoll.Add(temppt3d);
                                }
                            }
                            else
                            {
                                flag = true;
                            }
                            if (flag == true)
                            {
                                if (cjcoll.Count > 0)
                                {
                                    if (cjcoll.Count > 3)
                                    {
                                        //矩形框四个角点
                                        //选取2个为裁剪的两个节点
                                        //为计曲线上的点
                                        Point3d pt1cjnode = new Point3d();
                                        Point3d pt2node = new Point3d();
                                        Point3d pt3cjnode = new Point3d();
                                        Point3d pt4node = new Point3d();

                                        pt1cjnode = cjcoll[0];
                                        pt2node = cjcoll[1];
                                        pt3cjnode = cjcoll[cjcoll.Count - 2];
                                        pt4node = cjcoll[cjcoll.Count - 1];

                                        Point3dCollection rectcj = new Point3dCollection();
                                        rectcj.Add(pt1cjnode);
                                        rectcj.Add(pt2node);
                                        rectcj.Add(pt3cjnode);
                                        rectcj.Add(pt4node);

                                        #region
                                        Point2d pt2djudge1 = new Point2d(pt1cjnode.X, pt1cjnode.Y);
                                        Point2d pt2djudge2 = new Point2d(pt3cjnode.X, pt3cjnode.Y);

                                        if (pt2djudge1.GetDistanceTo(pt2djudge2) > lenIgnore)
                                        {
                                            #region//画裁剪线
                                            ////using (Transaction tran = doc.TransactionManager.StartTransaction())
                                            ////{

                                            ////    //// 以只读方式打开块表记录   Open the Block table record for read
                                            ////    BlockTable acbt = tran.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
                                            ////    //// 以写方式打开模型空间块表记录   Open the Block table record Model space for write
                                            ////    BlockTableRecord acblr = tran.GetObject(acbt[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;

                                            ////    //设置激活图层
                                            ////    layertable = tran.GetObject(db.LayerTableId, OpenMode.ForWrite) as LayerTable;
                                            ////    if (!layertable.Has("CJX"))
                                            ////    {
                                            ////        LayerTableRecord ltr = new LayerTableRecord();
                                            ////        ltr.Name = "CJX";
                                            ////        ObjectId layerid = layertable.Add(ltr);
                                            ////        tran.AddNewlyCreatedDBObject(ltr, true);
                                            ////        db.Clayer = layerid;
                                            ////    }
                                            ////    else
                                            ////    {
                                            ////        //设置首曲线为当期激活图层
                                            ////        foreach (ObjectId id in layertable)
                                            ////        {
                                            ////            LayerTableRecord lyrtbrec = tran.GetObject(id, OpenMode.ForWrite) as LayerTableRecord;
                                            ////            if (lyrtbrec.Name == "CJX")
                                            ////                db.Clayer = id;
                                            ////        }
                                            ////    }

                                            ////    Polyline3d cjxpl = new Polyline3d(Poly3dType.SimplePoly, cjcoll, false);

                                            ////    cjxpl.Color = GrxCAD.Colors.Color.FromColor(System.Drawing.Color.Blue);
                                            ////    acblr.AppendEntity(cjxpl);
                                            ////    cjxpl.Layer = "CJX";
                                            ////    tran.AddNewlyCreatedDBObject(cjxpl, true);

                                            ////    //doc.Editor.WriteMessage("");

                                            ////    tran.Commit();
                                            ////    tran.Dispose();
                                            ////}
                                            #endregion

                                            double Xmin = 9999999999, Xmax = 0, Ymin = 9999999999, Ymax = 0;
                                            //获取该点集的最大值最小值
                                            foreach (Point3d pt3dcorner in cjcoll)
                                            {
                                                if (Xmin >= pt3dcorner.X)
                                                    Xmin = pt3dcorner.X;
                                                if (Xmax < pt3dcorner.X)
                                                    Xmax = pt3dcorner.X;
                                                if (Ymin >= pt3dcorner.Y)
                                                    Ymin = pt3dcorner.Y;
                                                if (Ymax < pt3dcorner.Y)
                                                    Ymax = pt3dcorner.Y;
                                            }
                                            if (Xmin > Xmax)
                                            {
                                                double tempt = 0;
                                                tempt = Xmin;
                                                Xmin = Xmax;
                                                Xmax = tempt;
                                            }

                                            if (Ymin > Ymax)
                                            {
                                                double tempt = 0;
                                                tempt = Ymin;
                                                Ymin = Ymax;
                                                Ymax = tempt;
                                            }
                                            #region//设置视图
                                            //设置当前视图
                                            ViewTableRecord viewtr = new ViewTableRecord();
                                            viewtr.CenterPoint = new Point2d(Xmin + (Xmax - Xmin) / 2, Ymin + (Ymax - Ymin) / 2);
                                            viewtr.ViewDirection = new Vector3d(0, 0, 1);
                                            viewtr.Height = Ymax - Ymin + 100;
                                            viewtr.Width = Xmax - Xmin + 100;
                                            doc.Editor.SetCurrentView(viewtr);
                                            #endregion

                                            //对选择到的首曲线进行处理
                                            string stttr = "";
                                            TypedValue[] tvtemp = new TypedValue[1];
                                            tvtemp.SetValue(new TypedValue((int)DxfCode.LayerName, sqxlayer), 0);
                                            SelectionFilter sftemp = new SelectionFilter(tvtemp);
                                            PromptSelectionResult psrtempt = doc.Editor.SelectCrossingWindow(new Point3d(Xmin, Ymin, 0), new Point3d(Xmax, Ymax, 0), sftemp);
                                            if (psrtempt.Status == PromptStatus.OK)
                                            {
                                                SelectionSet sstempt = psrtempt.Value;
                                                #region
                                                using (Transaction tran = doc.TransactionManager.StartTransaction())
                                                {
                                                    //// 以只读方式打开块表记录   Open the Block table record for read
                                                    BlockTable acbt = tran.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
                                                    //// 以写方式打开模型空间块表记录   Open the Block table record Model space for write
                                                    BlockTableRecord acblr = tran.GetObject(acbt[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;

                                                    //设置激活图层
                                                    layertable = tran.GetObject(db.LayerTableId, OpenMode.ForWrite) as LayerTable;

                                                    //设置首曲线为当期激活图层
                                                    foreach (ObjectId id in layertable)
                                                    {
                                                        LayerTableRecord lyrtbrec = tran.GetObject(id, OpenMode.ForWrite) as LayerTableRecord;
                                                        if (lyrtbrec.Name == sqxlayer)
                                                            db.Clayer = id;
                                                    }
                                                    foreach (ObjectId oidtempt in sstempt.GetObjectIds())
                                                    {
                                                        Entity entempt = tran.GetObject(oidtempt, OpenMode.ForWrite) as Entity;

                                                        //if (ele1 > ele2)
                                                        //{
                                                        //    double tempt = 0;
                                                        //    tempt = ele1;
                                                        //    ele1 = ele2;
                                                        //    ele2 = tempt;
                                                        //}

                                                        if (entempt is Polyline)
                                                        {
                                                            Polyline pltempt = entempt as Polyline;
                                                            if (Convert.ToDouble(pltempt.Elevation.ToString("f1")) > ele1 && Convert.ToDouble(pltempt.Elevation.ToString("f1")) < ele2)
                                                            {
                                                                //裁剪节点集
                                                                Point3dCollection pt3dcolltempt = new Point3dCollection();
                                                                //裁剪节点集
                                                                Point3dCollection pt3dcolltempt2 = new Point3dCollection();


                                                                //裁剪节点
                                                                Point3d pt3dtt1 = pltempt.GetClosestPointTo(pt1cjnode, false);
                                                                Point3d pt3dtt2 = pltempt.GetClosestPointTo(pt3cjnode, false);

                                                                //将线端点以外的点添加进裁剪接节点
                                                                if (pt3dtt1 != new Point3d())
                                                                {
                                                                    if (pt3dtt1 != pltempt.StartPoint && pt3dtt1 != pltempt.EndPoint)
                                                                        pt3dcolltempt.Add(pt3dtt1);
                                                                }
                                                                if (pt3dtt2 != new Point3d())
                                                                {
                                                                    if (pt3dtt2 != pltempt.StartPoint && pt3dtt2 != pltempt.EndPoint)
                                                                        pt3dcolltempt.Add(pt3dtt2);
                                                                }
                                                                stttr += pltempt.StartPoint.X + "," + pltempt.StartPoint.Y + "," + pltempt.StartPoint.Z + "!" + pltempt.EndPoint.X + ","
                                                                    + pltempt.EndPoint.Y + "," + pltempt.EndPoint.Z + "\r\n";
                                                                stttr += pt3dtt1.X + "@" + pt3dtt1.Y + "@" + pt3dtt1.Z + "!" + pt3dtt2.X + "@" + pt3dtt2.Y + "@" + pt3dtt2.Z + "\r\n";
                                                                if (pt3dcolltempt.Count > 0)
                                                                {
                                                                    for (int ch = 0; ch < pt3dcolltempt.Count; ch++)
                                                                    {
                                                                        pt3dcolltempt2.Add(pt3dcolltempt[pt3dcolltempt.Count - 1 - ch]);
                                                                    }


                                                                    DBObjectCollection dbojcoll = null;
                                                                    DBObjectCollection dbojcoll2 = null;
                                                                    try
                                                                    {
                                                                        dbojcoll = pltempt.GetSplitCurves(pt3dcolltempt);
                                                                    }
                                                                    catch { }
                                                                    try
                                                                    {
                                                                        dbojcoll2 = pltempt.GetSplitCurves(pt3dcolltempt2);
                                                                    }
                                                                    catch { }

                                                                    if (dbojcoll2.Count > dbojcoll.Count)
                                                                        dbojcoll = dbojcoll2;
                                                                    //if (dbojcoll.Count >0)
                                                                    if (dbojcoll.Count < 1)
                                                                        continue;
                                                                    //{
                                                                    if (pltempt.Closed)//如果该线闭合
                                                                    {
                                                                        foreach (DBObject enen in dbojcoll)
                                                                        {
                                                                            Polyline plcjh = enen as Polyline;
                                                                            Point3dCollection ptcolltempt3d = new Point3dCollection();
                                                                            plcjh.GetStretchPoints(ptcolltempt3d);
                                                                            Point3d ptptpt = ptcolltempt3d[(int)(ptcolltempt3d.Count / 2)];
                                                                            //Point3d ptptpt = ptcolltempt3d[1];
                                                                            Point2d ptinen1 = new Point2d();
                                                                            Point2d ptinen2 = new Point2d();
                                                                            //double llen = 9999;
                                                                            if (en1 is Polyline)
                                                                            {
                                                                                Polyline plen1 = en1 as Polyline;
                                                                                Point3d mypt = plen1.GetClosestPointTo(ptptpt, false);
                                                                                ptinen1 = new Point2d(mypt.X, mypt.Y);

                                                                                //llen = plen1.GetClosestPointTo(ptptpt, false).DistanceTo(ptptpt);
                                                                            }
                                                                            else if (en1 is Polyline2d)
                                                                            {
                                                                                Polyline2d pl2den1 = en1 as Polyline2d;

                                                                                Point3d mypt = pl2den1.GetClosestPointTo(ptptpt, false);
                                                                                ptinen1 = new Point2d(mypt.X, mypt.Y);
                                                                                //llen = pl2den1.GetClosestPointTo(ptptpt, false).DistanceTo(ptptpt);
                                                                            }
                                                                            if (en2 is Polyline)
                                                                            {
                                                                                Polyline plen2 = en2 as Polyline;
                                                                                Point3d mypt = plen2.GetClosestPointTo(ptptpt, false);
                                                                                ptinen2 = new Point2d(mypt.X, mypt.Y);
                                                                            }
                                                                            else if (en2 is Polyline2d)
                                                                            {
                                                                                Polyline2d pl2den2 = en2 as Polyline2d;

                                                                                Point3d mypt = pl2den2.GetClosestPointTo(ptptpt, false);
                                                                                ptinen2 = new Point2d(mypt.X, mypt.Y);
                                                                            }
                                                                            double llen = 9999;
                                                                            if ((ptinen1 != new Point2d()) && (ptinen2 != new Point2d()))
                                                                            {
                                                                                llen = ptinen1.GetDistanceTo(ptinen2);
                                                                            }
                                                                            if (llen < scalelen)
                                                                            {
                                                                                cdentity.Add(plcjh);
                                                                            }
                                                                            else
                                                                            {
                                                                                acblr.AppendEntity(plcjh);
                                                                                plcjh.Layer = sqxlayer;
                                                                                tran.AddNewlyCreatedDBObject(plcjh, true);
                                                                            }
                                                                        }
                                                                    }
                                                                    else
                                                                    {
                                                                        foreach (DBObject enen in dbojcoll)
                                                                        {

                                                                            Polyline plcjh = enen as Polyline;
                                                                            Point2d startpoint = new Point2d(plcjh.StartPoint.X, plcjh.StartPoint.Y);
                                                                            Point2d endpoint = new Point2d(plcjh.EndPoint.X, plcjh.EndPoint.Y);

                                                                            double linelength = startpoint.GetDistanceTo(endpoint);

                                                                            if (linelength > 1.5 * mapscale)
                                                                            {
                                                                                //if ((plcjh.GetClosestPointTo(pt3dtt1, false) == pt3dtt1) && (plcjh.GetClosestPointTo(pt3dtt2, false) == pt3dtt2))
                                                                                if ((pt3dtt1 == plcjh.StartPoint || pt3dtt1 == plcjh.EndPoint) && (pt3dtt2 == plcjh.StartPoint || pt3dtt2 == plcjh.EndPoint))
                                                                                {
                                                                                    cdentity.Add(plcjh);
                                                                                }
                                                                                else
                                                                                {
                                                                                    acblr.AppendEntity(plcjh);
                                                                                    plcjh.Layer = sqxlayer;
                                                                                    tran.AddNewlyCreatedDBObject(plcjh, true);
                                                                                }
                                                                            }
                                                                            else
                                                                                cdentity.Add(plcjh);
                                                                        }
                                                                    }
                                                                    //}
                                                                    entempt.Erase(true);
                                                                    //tran.Commit();
                                                                }

                                                            }
                                                        }
                                                        else if (entempt is Polyline2d)
                                                        {
                                                            ////裁剪二维多段线代码
                                                            
                                                            Polyline2d pl2dtempt = entempt as Polyline2d;
                                                            if (Convert.ToDouble(pl2dtempt.Elevation.ToString("f1")) > ele1 && Convert.ToDouble(pl2dtempt.Elevation.ToString("f1")) < ele2)
                                                            {
                                                                Point3dCollection pt3dcolltempt = new Point3dCollection();
                                                                Point3d pt3dtt1 = pl2dtempt.GetClosestPointTo(pt1cjnode, false);
                                                                Point3d pt3dtt2 = pl2dtempt.GetClosestPointTo(pt3cjnode, false);

                                                                //将线端点以外的点添加进裁剪接节点
                                                                if (pt3dtt1 != new Point3d())
                                                                {
                                                                    if (pt3dtt1 != pl2dtempt.StartPoint && pt3dtt1 != pl2dtempt.EndPoint)
                                                                        pt3dcolltempt.Add(pt3dtt1);
                                                                }
                                                                if (pt3dtt2 != new Point3d())
                                                                {
                                                                    if (pt3dtt2 != pl2dtempt.StartPoint && pt3dtt2 != pl2dtempt.EndPoint)
                                                                        pt3dcolltempt.Add(pt3dtt2);
                                                                }
                                                                if (pt3dcolltempt.Count > 0)
                                                                {
                                                                    Polyline pltempt = new Polyline();                                                                   
                                                                    Point3dCollection pt3dpl2dcoll = new Point3dCollection();
                                                                    pl2dtempt.GetStretchPoints(pt3dpl2dcoll);
                                                                    //foreach (Point3d pt in pt3dpl2dcoll)
                                                                    //{
                                                                    //    pltempt.AddVertexAt(0,pt,0,0,0);
                                                                    //}

                                                                    DBObjectCollection dbojcoll = pl2dtempt.GetSplitCurves(pt3dcolltempt);
                                                                    if (dbojcoll.Count>0)
                                                                    {
                                                                    foreach (DBObject enen in dbojcoll)
                                                                    {
                                                                        Polyline2d pl2dcjh = enen as Polyline2d;

                                                                        Point2d startpoint = new Point2d(pl2dcjh.StartPoint.X, pl2dcjh.StartPoint.Y);
                                                                        Point2d endpoint = new Point2d(pl2dcjh.EndPoint.X, pl2dcjh.EndPoint.Y);

                                                                        double linelength = startpoint.GetDistanceTo(endpoint);

                                                                        if (linelength > 1.5 * mapscale)
                                                                        {

                                                                            if ((pl2dcjh.GetClosestPointTo(pt3dtt1, false) == pt3dtt1) && (pl2dcjh.GetClosestPointTo(pt3dtt2, false) == pt3dtt2))
                                                                            if ((pt3dtt1 == pl2dcjh.StartPoint || pt3dtt1 == pl2dcjh.EndPoint) && (pt3dtt2 == pl2dcjh.StartPoint || pt3dtt2 == pl2dcjh.EndPoint))
                                                                            {
                                                                                cdentity.Add(pl2dcjh);
                                                                            }
                                                                            else
                                                                            {
                                                                                acblr.AppendEntity(pl2dcjh);
                                                                                pl2dcjh.Layer = sqxlayer;
                                                                                tran.AddNewlyCreatedDBObject(pl2dcjh, true);
                                                                            }
                                                                        }
                                                                        else
                                                                            cdentity.Add(pl2dcjh);
                                                                    }

                                                                    } 
                                                                    entempt.Erase(true);
                                                                    tran.Commit();
                                                                }
                                                            }

                                                  
                                                        }

                                                        #region//画裁剪线
                                                        //Polyline3d cjxpl = new Polyline3d(Poly3dType.SimplePoly, rectcj, false);
                                                        //if (!layertable.Has("CJX"))
                                                        //{
                                                        //    LayerTableRecord ltr = new LayerTableRecord();
                                                        //    ltr.Name = "CJX";
                                                        //    ObjectId layerid = layertable.Add(ltr);
                                                        //    tran.AddNewlyCreatedDBObject(ltr, true);
                                                        //    //db.Clayer = layerid;
                                                        //}

                                                        //cjxpl.Color = GrxCAD.Colors.Color.FromColor(System.Drawing.Color.Blue);
                                                        //acblr.AppendEntity(cjxpl);
                                                        //cjxpl.Layer = "CJX";
                                                        //tran.AddNewlyCreatedDBObject(cjxpl, true);
                                                        ////doc.Editor.WriteMessage("");
                                                        #endregion

                                                    }

                                                    tran.Commit();
                                                    tran.Dispose();
                                                }
                                                #endregion
                                            }

                                        }

                                    }
                                    cjcoll.Clear();
                                    cjcoll = new Point3dCollection();
                                }

                                flag = false;
                                continue;
                            }//end if
                            else
                            {
                                continue;
                            }
                        }
                    }
                }
            }
            else
                return;      
       #endregion
       #region
            ///画裁剪掉的线
            if (cdentity.Count > 0)
            {
                using (Transaction tran = doc.TransactionManager.StartTransaction())
                {

                    //// 以只读方式打开块表记录   Open the Block table record for read
                    BlockTable acbt = tran.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
                    //// 以写方式打开模型空间块表记录   Open the Block table record Model space for write
                    BlockTableRecord acblr = tran.GetObject(acbt[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;

                    //设置激活图层
                    layertable = tran.GetObject(db.LayerTableId, OpenMode.ForWrite) as LayerTable;
                    if (!layertable.Has("CJSQX"))
                    {
                        LayerTableRecord ltr = new LayerTableRecord();
                        ltr.Name = "CJSQX";
                        ObjectId layerid = layertable.Add(ltr);
                        tran.AddNewlyCreatedDBObject(ltr, true);
                        db.Clayer = layerid;
                    }
                    else
                    {
                        foreach (ObjectId id in layertable)
                        {
                            LayerTableRecord lyrtbrec = tran.GetObject(id, OpenMode.ForWrite) as LayerTableRecord;
                            if (lyrtbrec.Name == "CJSQX")
                                db.Clayer = id;
                        }
                    }

                    foreach (Entity enenen in cdentity)
                    {
                        enenen.Color = GrxCAD.Colors.Color.FromColor(System.Drawing.Color.Red);
                        acblr.AppendEntity(enenen);
                        enenen.Layer = "CJSQX";
                        tran.AddNewlyCreatedDBObject(enenen, true);
                    }

                    doc.Editor.WriteMessage("已完成裁剪\r\n裁剪掉的等高线都放在CJSQX图层中\r\n");

                    tran.Commit();
                    tran.Dispose();
                }
            }
            #endregion
            documentlock.Dispose();
            doc.Editor.WriteMessage("程序运行结束");          
        }
        public static int CompareDGXByElevation(Entity en1, Entity en2)
        {
            double ele1 = 0, ele2 = 0;
            //because just Polyline and Polyline2d two class in plentitycollection
            if (en1 is Polyline)
            {
                Polyline pl = en1 as Polyline;
                ele1 = Convert.ToDouble(pl.Elevation.ToString("f1"));
            }
            else
            {
                Polyline2d pl2d = en1 as Polyline2d;
                ele1 = Convert.ToDouble(pl2d.Elevation.ToString("f1"));
            }

            if (en2 is Polyline)
            {
                Polyline pl = en2 as Polyline;
                ele2 = Convert.ToDouble(pl.Elevation.ToString("f1"));
            }
            else
            {
                Polyline2d pl2d = en2 as Polyline2d;
                ele2 = Convert.ToDouble(pl2d.Elevation.ToString("f1"));
            }

            return (int)(ele1 - ele2);

        }
        public static Point3d GetClosestPoint(Point3d pt, Entity enpl)
        {
            if (enpl is Polyline)
            {
                Polyline pl = enpl as Polyline;
                return pl.GetClosestPointTo(pt, true);
            }
            else
            {
                Polyline2d pl2d = enpl as Polyline2d;
                return pl2d.GetClosestPointTo(pt, true);
            }
        }
       #endregion
    }
}