'定义圆的圆心
Dim center As Point3d = New Point3d(100, 100, 0)
'定义圆的半径 Dim radius As Double = 50
'定义一个Circle对象来表示你要生成的圆,传入的第二个参数为圆的法向, '就是把圆生、//成在什么面上,因为AutoCAD程序一般都是平面问题, '因此你一般都把这个法向量定义成//z轴方向。 Dim circle As Circle circle = New Circle(center, New Vector3d(0, 0, 1), radius)
Dim bt As BlockTable Dim btr As BlockTableRecord
Dim db As Database '获得当前活动AutoCAD文档所在的数据库 db = Application.DocumentManager.MdiActiveDocument.Database
'获得事务处理管理器 Dim tm As Autodesk.AutoCAD.DatabaseServices.TransactionManager tm = db.TransactionManager
'定义事务处理 Dim trans As Transaction
Try '开始事务处理,也就是往CAD中加入东西 trans = tm.StartTransaction bt = tm.GetObject(db.BlockTableId, OpenMode.ForRead, False)
'获得块表记录 btr = tm.GetObject(bt(BlockTableRecord.ModelSpace), OpenMode.ForWrite, False)
'向块表记录加入圆的相关信息 btr.AppendEntity(Circle)
'向AutoCAD加入圆 tm.AddNewlyCreatedDBObject(Circle, True)
trans.Commit()
Catch ex As Exception Throw New ApplicationException(ex.Message) End Try |