在三维空间中工作 > 在三维空间中编辑 > 
沿着平面镜像对象
 
 

With the TransformBy method of an object and the Mirroring method of a Matrix, you can mirror objects along a specified mirroring plane specified by three points.

使用 对象的 TransformBy 方法和 Matrix 的 Mirroring 方法，可以沿由三点指定的特定镜像平面镜像对象。

For more information on mirroring objects in 3D, see “Mirror Objects” in the AutoCAD User's Guide.

有关在三维中镜像对象的详细信息，请参见《AutoCAD 用户手册》中的“镜像对象”。

在三维空间中镜像对象

This example creates a box in model space. It then mirrors the box about a plane and colors the mirrored box red.

本样例在模型空间中创建一个长方体，然后根据某个平面镜像该长方体，并将镜像得到的长方体着色为红色。

VB.NET 

Imports Autodesk.AutoCAD.Runtime
Imports Autodesk.AutoCAD.ApplicationServices
Imports Autodesk.AutoCAD.DatabaseServices
Imports Autodesk.AutoCAD.Geometry
 
<CommandMethod("MirrorABox3D")> _
Public Sub MirrorABox3D()
  ''获得当前文档和数据库，并启动一个事务   Get the current document and database, and start a transaction
  Dim acDoc As Document = Application.DocumentManager.MdiActiveDocument
  Dim acCurDb As Database = acDoc.Database
 
  Using acTrans As Transaction = acCurDb.TransactionManager.StartTransaction()
      '' 以只读方式打开块表   Open the Block table for read
      Dim acBlkTbl As BlockTable
      acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId, _
                                   OpenMode.ForRead)
 
      '' 以写方式打开模型空间块表记录   Open the Block table record Model space for write
      Dim acBlkTblRec As BlockTableRecord
      acBlkTblRec = acTrans.GetObject(acBlkTbl(BlockTableRecord.ModelSpace), _
                                      OpenMode.ForWrite)
 
      '' Create a 3D solid box
      Dim acSol3D As Solid3d = New Solid3d()
      acSol3D.SetDatabaseDefaults()
      acSol3D.CreateBox(5, 7, 10)
 
      '' Position the center of the 3D solid at (5,5,0) 
      acSol3D.TransformBy(Matrix3d.Displacement(New Point3d(5, 5, 0) - _
                                                Point3d.Origin))
 
      '' 添加新对象到块表记录和事务中   Add the new object to the block table record and the transaction
      acBlkTblRec.AppendEntity(acSol3D)
      acTrans.AddNewlyCreatedDBObject(acSol3D, True)
 
      '' Create a copy of the original 3D solid and change the color of the copy
      Dim acSol3DCopy As Solid3d = acSol3D.Clone()
      acSol3DCopy.ColorIndex = 1
 
      '' Define the mirror plane
      Dim acPlane As Plane = New Plane(New Point3d(1.25, 0, 0), _
                                       New Point3d(1.25, 2, 0), _
                                       New Point3d(1.25, 2, 2))
 
      '' Mirror the 3D solid across the plane
      acSol3DCopy.TransformBy(Matrix3d.Mirroring(acPlane))
 
      '' 添加新对象到块表记录和事务中   Add the new object to the block table record and the transaction
      acBlkTblRec.AppendEntity(acSol3DCopy)
      acTrans.AddNewlyCreatedDBObject(acSol3DCopy, True)
 
      '' 保存新对象到数据库中   Save the new objects to the database
      acTrans.Commit()
  End Using
End Sub

C# 

using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
 
[CommandMethod("MirrorABox3D")]
public static void MirrorABox3D()
{
  // Get the current document and database, and start a transaction
  Document acDoc = Application.DocumentManager.MdiActiveDocument;
  Database acCurDb = acDoc.Database;
 
  using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
  {
      // 以只读方式打开块表记录   Open the Block table record for read
      BlockTable acBlkTbl;
      acBlkTbl = acTrans.GetObject(acCurDb.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 acBlkTblRec;
      acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace],
                                      OpenMode.ForWrite) as BlockTableRecord;
 
      // Create a 3D solid box
      Solid3d acSol3D = new Solid3d();
      acSol3D.SetDatabaseDefaults();
      acSol3D.CreateBox(5, 7, 10);
 
      // Position the center of the 3D solid at (5,5,0)
      acSol3D.TransformBy(Matrix3d.Displacement(new Point3d(5, 5, 0) -
                                                Point3d.Origin));
 
      // 添加新对象到块表记录和事务中   Add the new object to the block table record and the transaction
      acBlkTblRec.AppendEntity(acSol3D);
      acTrans.AddNewlyCreatedDBObject(acSol3D, true);
 
      // Create a copy of the original 3D solid and change the color of the copy
      Solid3d acSol3DCopy = acSol3D.Clone() as Solid3d;
      acSol3DCopy.ColorIndex = 1;
 
      // Define the mirror plane
      Plane acPlane = new Plane(new Point3d(1.25, 0, 0),
                                new Point3d(1.25, 2, 0),
                                new Point3d(1.25, 2, 2));
 
      // Mirror the 3D solid across the plane
      acSol3DCopy.TransformBy(Matrix3d.Mirroring(acPlane));
 
      // 添加新对象到块表记录和事务中   Add the new object to the block table record and the transaction
      acBlkTblRec.AppendEntity(acSol3DCopy);
      acTrans.AddNewlyCreatedDBObject(acSol3DCopy, true);
 
      // 保存新对象到数据库中   Save the new objects to the database
      acTrans.Commit();
  }
}
VBA/ActiveX 代码参考