【已解决】指定点打断线段

白糖

2. 
   
3. using System;
   
4. using System.Collections.Generic;
   
5. using System.ComponentModel;
   
6. using System.Diagnostics;
   
7. using System.Drawing;
   
8. using System.Windows.Forms;
   
9. using Autodesk.AutoCAD.ApplicationServices;
   
10. using Autodesk.AutoCAD.DatabaseServices;
    
11. using Autodesk.AutoCAD.EditorInput;
    
12. using Autodesk.AutoCAD.Geometry;
    
13. using Autodesk.AutoCAD.Runtime;
    
14. namespace CADtest
    
15. {
    
16. ///
    
17. /// Description of UserControl1.
    
18. ///
    
19. public partial class UserControl1 : UserControl
    
20. {
    
21.   public UserControl1()
    
22.   {
    
23.    //
    
24.    // The InitializeComponent() call is required for Windows Forms designer support.
    
25.    //
    
26.    InitializeComponent();
    
27.    
    
28.    //
    
29.    // TODO: Add constructor code after the InitializeComponent() call.
    
30.    //
    
31.   }
    
32.   [CommandMethod("test")]
    
33.   public void Test()
    
34.   {
    
35.    Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
    
36.    Database db = doc.Database;
    
37.    Editor ed = doc.Editor;
    
38.    PromptSelectionOptions selOpts = new PromptSelectionOptions();
    
39.    selOpts.MessageForAdding = "\n请选取线段";
    
40.    SelectionFilter sf = new SelectionFilter(new TypedValue[]{new TypedValue(0,"Line")});
    
41.    PromptSelectionResult selRes = ed.GetSelection(selOpts,sf);
    
42.    if (selRes.Status != PromptStatus.OK) return;
    
43.    List<ObjectId> ids = new List<ObjectId>(selRes.Value.GetObjectIds());
    
44.    
    
45.    using (Transaction trans = db.TransactionManager.StartTransaction())
    
46.    {
    
47.     List<Line> lstLines = new List<Line>();
    
48.     foreach (ObjectId id in ids)
    
49.     {
    
50.      Entity ent = trans.GetObject(id,OpenMode.ForRead) as Entity;
    
51.      if (ent.GetType() == typeof(Line))
    
52.      {
    
53.       Line line = ent as Line;
    
54.       lstLines.Add(line);
    
55.      }
    
56.     }
    
57.     BreakLine(lstLines);
    
58.     trans.Commit();
    
59.    }
    
60.   }
    
61.   //从原点打断中线
    
62.   public void BreakLine(List<Line> lines)
    
63.   {
    
64.    Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
    
65.    Database db = doc.Database;
    
66.    Editor ed = doc.Editor;
    
67.    
    
68.    using (Transaction trans = db.TransactionManager.StartTransaction())
    
69.    {
    
70.     //原点
    
71.     Point3d OriginPoint = new Point3d(0,0,0);
    
72.     foreach(Line line in lines)
    
73.     {
    
74.      MessageBox.Show(line.ObjectId.ToString()+":"+line.GetClosestPointTo(OriginPoint, false).DistanceTo(OriginPoint)+"\n");
    
75.      if (line.GetClosestPointTo(OriginPoint,false).DistanceTo(OriginPoint) < Tolerance.Global.EqualPoint)//取得原点所在线段(设置容差)
    
76.      {
    
77.       List<double> pars = new List<double>();
    
78.       pars.Add(line.GetParameterAtPoint(OriginPoint));
    
79.       BlockTableRecord btr = (BlockTableRecord)trans.GetObject(db.CurrentSpaceId, OpenMode.ForWrite, false);
    
80.       DBObjectCollection objs;
    
81.       //按原点打断
    
82.       objs = line.GetSplitCurves(new DoubleCollection(pars.ToArray()));
    
83.       foreach (Line newline in objs)
    
84.       {
    
85.        btr.AppendEntity(newline);
    
86.        trans.AddNewlyCreatedDBObject(newline, true);
    
87.       }
    
88.       line.UpgradeOpen();
    
89.       line.Erase();
    
90.       trans.Commit();
    
91.      }
    
92.     }
    
93.    }
    
94.   }
    
95. }
    
96. }

<br /> using System;<br /> using System.Collections.Generic;<br /> using System.ComponentModel;<br /> using System.Diagnostics;<br /> using System.Drawing;<br /> using System.Windows.Forms;<br /> using Autodesk.<a href="http://bbs.mjtd.com/forum-41-1.html" target="_blank" class="relatedlink">AutoCAD</a>.ApplicationServices;<br /> using Autodesk.AutoCAD.DatabaseServices;<br /> using Autodesk.AutoCAD.EditorInput;<br /> using Autodesk.AutoCAD.Geometry;<br /> using Autodesk.AutoCAD.Runtime;<br /> namespace CADtest<br /> {<br /> /// <br /> /// Description of UserControl1.<br /> /// <br /> public partial class UserControl1 : UserControl<br /> {<br />   public UserControl1()<br />   {<br />    //<br />    // The InitializeComponent() call is required for Windows Forms designer support.<br />    //<br />    InitializeComponent();<br />    <br />    //<br />    // TODO: Add constructor code after the InitializeComponent() call.<br />    //<br />   }<br />   [CommandMethod("test")]<br />   public void Test()<br />   {<br />    Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;<br />    Database db = doc.Database;<br />    Editor ed = doc.Editor;<br />    PromptSelectionOptions selOpts = new PromptSelectionOptions();<br />    selOpts.MessageForAdding = "\n请选取线段";<br />    SelectionFilter sf = new SelectionFilter(new TypedValue[]{new TypedValue(0,"Line")});<br />    PromptSelectionResult selRes = ed.GetSelection(selOpts,sf);<br />    if (selRes.Status != PromptStatus.OK) return;<br />    List<ObjectId> ids = new List<ObjectId>(selRes.Value.GetObjectIds());<br />    <br />    using (Transaction trans = db.TransactionManager.StartTransaction())<br />    {<br />     List<Line> lstLines = new List<Line>();<br />     foreach (ObjectId id in ids)<br />     {<br />      Entity ent = trans.GetObject(id,OpenMode.ForRead) as Entity;<br />      if (ent.GetType() == typeof(Line))<br />      {<br />       Line line = ent as Line;<br />       lstLines.Add(line);<br />      }<br />     }<br />     BreakLine(lstLines);<br />     trans.Commit();<br />    }<br />   }<br />   //从原点打断中线<br />   public void BreakLine(List<Line> lines)<br />   {<br />    Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;<br />    Database db = doc.Database;<br />    Editor ed = doc.Editor;<br />    <br />    using (Transaction trans = db.TransactionManager.StartTransaction())<br />    {<br />     //原点<br />     Point3d OriginPoint = new Point3d(0,0,0);<br />     foreach(Line line in lines)<br />     {<br />      MessageBox.Show(line.ObjectId.ToString()+":"+line.GetClosestPointTo(OriginPoint, false).DistanceTo(OriginPoint)+"\n");<br />      if (line.GetClosestPointTo(OriginPoint,false).DistanceTo(OriginPoint) < Tolerance.Global.EqualPoint)//取得原点所在线段(设置容差)<br />      {<br />       List<double> pars = new List<double>();<br />       pars.Add(line.GetParameterAtPoint(OriginPoint));<br />       BlockTableRecord btr = (BlockTableRecord)trans.GetObject(db.CurrentSpaceId, OpenMode.ForWrite, false);<br />       DBObjectCollection objs;<br />       //按原点打断<br />       objs = line.GetSplitCurves(new DoubleCollection(pars.ToArray()));<br />       foreach (Line newline in objs)<br />       {<br />        btr.AppendEntity(newline);<br />        trans.AddNewlyCreatedDBObject(newline, true);<br />       }<br />       line.UpgradeOpen();<br />       line.Erase();<br />       trans.Commit();<br />      }<br />     }<br />    }<br />   }<br /> }<br /> }

sieben

1，你倒是说一下可能哪里出错，有什么提示？
2， if (line.GetClosestPointTo(OriginPoint, false).DistanceTo(OriginPoint) == 0) 这一句或许与你的预期不一样，0.000000001 与0.0是不等的
3， oldLine.UpgradeOpen();
        oldLine.Erase();
        trans.Commit();
oldLine 并非是下方的事务中打开的，你在这里修改应该是有问题的

白糖

sieben 发表于 2012-9-29 22:51
1，你倒是说一下可能哪里出错，有什么提示？
2， if (line.GetClosestPointTo(OriginPoint, false).Distan ...

修改了下代码，确实是求最近距离那里出了问题，求出来的距离非预期，请问怎么解决呢？