如何使用Jigs动态旋转实体?

sclkkk · 发表于 2011-9-29 08:02:00

用了置顶里的方法
public void RotateEntity()
{
   Document doc =
      Application.DocumentManager.MdiActiveDocument;
   Editor ed = doc.Editor;
   Database db = doc.Database;

   // First we prompt for the entity to rotate

   PromptEntityOptions peo =
      new PromptEntityOptions(
      "\nSelect entity to rotate: "
      );
   PromptEntityResult per =
      ed.GetEntity(peo);

   if (per.Status == PromptStatus.OK)
   {
      Transaction tr =
      db.TransactionManager.StartTransaction();
      using (tr)
      {
      DBObject obj =
         tr.GetObject(per.ObjectId, OpenMode.ForRead);
      Entity ent = obj as Entity;

      // Use the origin as the default center

      Point3d rotationPoint = Point3d.Origin;

      // If the entity is a polyline,
      // assume it is rectangular and then
      // set the rotation point as its center

      Polyline pl = obj as Polyline;
      if (pl != null)
      {
         LineSegment3d ps0 =
            pl.GetLineSegmentAt(0);
         LineSegment3d ps1 =
            pl.GetLineSegmentAt(1);
         Vector3d vec =
            ((ps0.EndPoint - ps0.StartPoint) / 2.0) +
            ((ps1.EndPoint - ps1.StartPoint) / 2.0);
         rotationPoint = pl.StartPoint + vec;
      }

      // Get the base rotation angle stored with the
      // entity, if there was one (default is 0.0)

      double baseAngle = GetStoredRotation(obj);

      if (ent != null)
      {
         // Get the current UCS, to pass to the Jig

         Matrix3d ucs =
            ed.CurrentUserCoordinateSystem;

         // Create our jig object

         RotateJig jig =
            new RotateJig(
            ent,
            rotationPoint,
            baseAngle,
            ucs
            );

         PromptResult res = ed.Drag(jig);
         if (res.Status == PromptStatus.OK)
         {
            // Get the overall rotation angle
            // and dispose of the temp clone

            double newAngle = jig.GetRotation();
            jig.GetEntity().Dispose();

            // Rotate the original entity

            Matrix3d trans =
            Matrix3d.Rotation(
               newAngle - baseAngle,
               ucs.CoordinateSystem3d.Zaxis,
               rotationPoint);

            ent.UpgradeOpen();
            ent.TransformBy(trans);

            // Store the new rotation as XData

            SetStoredRotation(ent, newAngle);
         }
      }
      tr.Commit();
      }
   }
}
但没有动态旋转效果,并且运行到ent.UpgradeOpen() 就退出了,我的实体是一个块图形