C#取得多段线中圆弧中点坐标

ObjectARX

1. using System;
   
2. using Autodesk.AutoCAD.Runtime;
   
3. using Autodesk.AutoCAD.DatabaseServices;
   
4. using Autodesk.AutoCAD.Geometry;
   
5. using Autodesk.AutoCAD.GraphicsInterface;
   
6. using Autodesk.AutoCAD.EditorInput;
   
7. using Autodesk.AutoCAD.ApplicationServices;
   
8. [assembly: ExtensionApplication(typeof(ClassLibrary.Lab8Class))]
   
9. [assembly: CommandClass(typeof(ClassLibrary.Lab8Class))]
   
10. namespace ClassLibrary
    
11. {
    
12. public class Lab8Class:IExtensionApplication
    
13. {
    
14.   public void Initialize()
    
15.   {
    
16.    Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor.WriteMessage("\n调试程序命令LV");//初始化操作
    
17.   }
    
18.   public void Terminate()
    
19.   {
    
20.    //清除操作
    
21.   }
    
22. 
    
23.   public Lab8Class()
    
24.   {
    
25.    //
    
26.    // TODO: Add constructor logic here
    
27.    //
    
28.   }
    
29.   Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
    
30.   Database db = Autodesk.AutoCAD.DatabaseServices.HostApplicationServices.WorkingDatabase;
    
31.   Autodesk.AutoCAD.DatabaseServices.TransactionManager tm = Autodesk.AutoCAD.DatabaseServices.HostApplicationServices.WorkingDatabase.TransactionManager;
    
32.   // Define Command "AsdkCmd1"
    
33.   [CommandMethod("LV")]
    
34.   public void getPlPoint() // This method can have any name
    
35.   {
    
36.    try
    
37.    {
    
38.     Transaction trans=tm.StartTransaction();
    
39. //    BlockTableRecord btr;
    
40. //    BlockTable bt;
    
41.     using(trans)
    
42.     {
    
43.                      PromptEntityResult per = ed.GetEntity("请选择多段线");
    
44.      if(per.Status == PromptStatus.OK)
    
45.      {
    
46.       DBObject obj = trans.GetObject(per.ObjectId, OpenMode.ForRead);
    
47.       {
    
48.        Polyline PL = obj as Polyline;
    
49.        int vn = PL.NumberOfVertices;
    
50.        for(int i = 0; i<= vn; i++)
    
51.        {
    
52.         Point3d pt3d = PL.GetPoint3dAt(i-1);
    
53.         double vBulge = PL.GetBulgeAt(i);
    
54.         if(vBulge != 0)
    
55.         {
    
56.                   //方法一，比较笨的方法。
    
57.              double len0 = PL.GetDistAtPoint(PL.GetPoint3dAt(i));
    
58.              double len1 = PL.GetDistAtPoint(PL.GetPoint3dAt(i+1));
    
59.              double midlen = (len0 + len1)/2;
    
60.              ed.WriteMessage("\n第二种方法计算的圆弧中点是：" + midP3d.ToString());
    
61.                    //方法二，但是速度比较慢好像，因为如果加上下面的代码，运行速度明显慢，前面是感觉不出来的，后面的要停顿一下，可能有异常
    
62.              Point3d midL = PL.GetPointAtParameter(i+0.5);
    
63.              ed.WriteMessage("\n第二种方法计算的圆弧中点是：" + midL.ToString());   
    
64.         }
    
65.        }
    
66.       }
    
67.      }
    
68.      trans.Commit();
    
69.      trans.Dispose();
    
70.     }
    
71.    }
    
72.    catch{}
    
73.    finally
    
74.    {
    
75.    }
    
76.   }
    
77. }
    
78. }
    

using System;<br /> using Autodesk.AutoCAD.Runtime;<br /> using Autodesk.AutoCAD.DatabaseServices;<br /> using Autodesk.AutoCAD.Geometry;<br /> using Autodesk.AutoCAD.GraphicsInterface;<br /> using Autodesk.AutoCAD.EditorInput;<br /> using Autodesk.AutoCAD.ApplicationServices;<br /> [assembly: ExtensionApplication(typeof(ClassLibrary.Lab8Class))]<br /> [assembly: CommandClass(typeof(ClassLibrary.Lab8Class))]<br /> namespace ClassLibrary<br /> {<br /> public class Lab8Class:IExtensionApplication<br /> {<br />   public void Initialize()<br />   {<br />    Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor.WriteMessage("\n调试程序命令LV");//初始化操作<br />   }<br />   public void Terminate()<br />   {<br />    //清除操作<br />   }<br /> <br />   public Lab8Class()<br />   {<br />    //<br />    // TODO: Add constructor logic here<br />    //<br />   }<br />   Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;<br />   Database db = Autodesk.AutoCAD.DatabaseServices.HostApplicationServices.WorkingDatabase;<br />   Autodesk.AutoCAD.DatabaseServices.TransactionManager tm = Autodesk.AutoCAD.DatabaseServices.HostApplicationServices.WorkingDatabase.TransactionManager;<br />   // Define Command "AsdkCmd1"<br />   [CommandMethod("LV")]<br />   public void getPlPoint() // This method can have any name<br />   {<br />    try<br />    {<br />     Transaction trans=tm.StartTransaction();<br /> //    BlockTableRecord btr;<br /> //    BlockTable bt;<br />     using(trans)<br />     {<br />                      PromptEntityResult per = ed.GetEntity("请选择多段线");<br />      if(per.Status == PromptStatus.OK)<br />      {<br />       DBObject obj = trans.GetObject(per.ObjectId, OpenMode.ForRead);<br />       {<br />        Polyline PL = obj as Polyline;<br />        int vn = PL.NumberOfVertices;<br />        for(int i = 0; i<= vn; i++)<br />        {<br />         Point3d pt3d = PL.GetPoint3dAt(i-1);<br />         double vBulge = PL.GetBulgeAt(i);<br />         if(vBulge != 0)<br />         {<br />                   //方法一，比较笨的方法。<br />              double len0 = PL.GetDistAtPoint(PL.GetPoint3dAt(i));<br />              double len1 = PL.GetDistAtPoint(PL.GetPoint3dAt(i+1));<br />              double midlen = (len0 + len1)/2;<br />              ed.WriteMessage("\n第二种方法计算的圆弧中点是：" + midP3d.ToString());<br />                    //方法二，但是速度比较慢好像，因为如果加上下面的代码，运行速度明显慢，前面是感觉不出来的，后面的要停顿一下，可能有异常<br />              Point3d midL = PL.GetPointAtParameter(i+0.5);<br />              ed.WriteMessage("\n第二种方法计算的圆弧中点是：" + midL.ToString());   <br />         }<br />        }<br />       }<br />      }<br />      trans.Commit();<br />      trans.Dispose();<br />     }<br />    }<br />    catch{}<br />    finally<br />    {<br />    }<br />   }<br /> }<br /> }<br />