实体的镜像

cdinten

貌似AutoCAD2006中实体没有Mirror方法，这让人很纠结，写了个程序演示实体的镜像，代码如下：

2. [CommandMethod("MP")]//Mirror Entity
   
3. public void MirrorEntity()
   
4. {
   
5. Database db = Application.DocumentManager.MdiActiveDocument.Database;
   
6. Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
   
7. //对称平面
   
8. Plane mp = new Plane(new Point3d(1, 0, 0), new Point3d(0, 1, 0), new Point3d(0, 0, 1));
   
9. double x = mp.Normal.X;
   
10. double y = mp.Normal.Y;
    
11. double z = mp.Normal.Z;
    
12. double[] dm = new double[16];
    
13. dm[0] = 1 - 2 * x * x;
    
14. dm[5] = 1 - 2 * y * y;
    
15. dm[10] = 1 - 2 * z * z;
    
16. dm[15]=1;
    
17. dm[1] = dm[4] = -2*x * y;
    
18. dm[2] = dm[8] = -2*x * z;
    
19. dm[6] = dm[9] = -2*y * z;
    
20. Matrix3d Tm = new Matrix3d(dm);
    
21. using (Transaction trans = db.TransactionManager.StartTransaction())
    
22. {
    
23. BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForRead);
    
24. BlockTableRecord btr = (BlockTableRecord)trans.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
    
25. Solid3d sld = new Solid3d();
    
26. sld.SetDatabaseDefaults();
    
27. sld.CreateBox(100, 150, 200);
    
28. sld.ColorIndex = 1;//red
    
29. btr.AppendEntity(sld);
    
30. trans.AddNewlyCreatedDBObject(sld, true);
    
31. Solid3d sldClone = sld.Clone() as Solid3d;
    
32. sldClone.ColorIndex = 3;//green
    
33. sldClone.TransformBy(Tm);
    
34. btr.AppendEntity(sldClone);
    
35. trans.AddNewlyCreatedDBObject(sldClone, true);
    
36. trans.Commit();
    
37. }
    
38. }

[CommandMethod("MP")]//Mirror Entity<br /> public void MirrorEntity()<br /> {<br /> Database db = Application.DocumentManager.MdiActiveDocument.Database;<br /> Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;<br /> //对称平面<br /> Plane mp = new Plane(new Point3d(1, 0, 0), new Point3d(0, 1, 0), new Point3d(0, 0, 1));<br /> double x = mp.Normal.X;<br /> double y = mp.Normal.Y;<br /> double z = mp.Normal.Z;<br /> double[] dm = new double[16];<br /> dm[0] = 1 - 2 * x * x;<br /> dm[5] = 1 - 2 * y * y;<br /> dm[10] = 1 - 2 * z * z;<br /> dm[15]=1;<br /> dm[1] = dm[4] = -2*x * y;<br /> dm[2] = dm[8] = -2*x * z;<br /> dm[6] = dm[9] = -2*y * z;<br /> Matrix3d Tm = new Matrix3d(dm);<br /> using (Transaction trans = db.TransactionManager.StartTransaction())<br /> {<br /> BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForRead);<br /> BlockTableRecord btr = (BlockTableRecord)trans.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);<br /> Solid3d sld = new Solid3d();<br /> sld.SetDatabaseDefaults();<br /> sld.CreateBox(100, 150, 200);<br /> sld.ColorIndex = 1;//red<br /> btr.AppendEntity(sld);<br /> trans.AddNewlyCreatedDBObject(sld, true);<br /> Solid3d sldClone = sld.Clone() as Solid3d;<br /> sldClone.ColorIndex = 3;//green<br /> sldClone.TransformBy(Tm);<br /> btr.AppendEntity(sldClone);<br /> trans.AddNewlyCreatedDBObject(sldClone, true);<br /> trans.Commit();<br /> }<br /> }

希望对大家能有所帮助。
详细的原理讲解可以看我的博客，链接为：http://379910987.blog.163.com/blog/static/33523797201011306586296/

雪山飞狐_lzh

还有简单的方法，：）
Matrix3d mat = Matrix3d.Mirroring(plane);

chpmould

谢谢分享，学习了，