‎使用 ObjectARX 缩放、平移和环绕当前 AutoCAD 视图‎

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[code]static void panView()

{

    AcDbDatabase *pDb =

    acdbHostApplicationServices()->workingDatabase();  



       acedVports2VportTableRecords();



     //get the active viewport object

      AcDbViewportTable *pVpT = NULL;

      AcDbViewportTableRecord *pActVp = NULL;

      //get the *Active view port

      pDb->getViewportTable(pVpT,AcDb::kForRead);

      pVpT->getAt(_T("*Active"),pActVp,AcDb::kForWrite);

      pVpT->close();



      //get the view center point



      //assume we need to pan the view along X & Y in 10

      double panStep = 10;

      AcGePoint2d mCentPt = pActVp->centerPoint();

      mCentPt.x += panStep;

      mCentPt.y += panStep;



      //set the view center

      pActVp->setCenterPoint(mCentPt);

      //close the Active viewport

      pActVp->close();  

      //update the viewport

      acedVportTableRecords2Vports();

}



static void zoomView()

{

    AcDbDatabase *pDb =

    acdbHostApplicationServices()->workingDatabase();  



       acedVports2VportTableRecords();



     //get the active viewport object

      AcDbViewportTable *pVpT = NULL;

      AcDbViewportTableRecord *pActVp = NULL;

      //get the *Active view port

      pDb->getViewportTable(pVpT,AcDb::kForRead);

      pVpT->getAt(_T("*Active"),pActVp,AcDb::kForWrite);

      pVpT->close();  



      //assume we need to zoom the view out in scaling 10

      double zoomFactor = 10;



      pActVp->setHeight(pActVp->height() * zoomFactor);

      pActVp->setWidth(pActVp->width() * zoomFactor);



      //close the Active viewport

      pActVp->close();  

      //update the viewport

      acedVportTableRecords2Vports();

}



static void orbitView()

{

    AcDbDatabase *pDb =

    acdbHostApplicationServices()->workingDatabase();  



       acedVports2VportTableRecords();



     //get the active viewport object

      AcDbViewportTable *pVpT = NULL;

      AcDbViewportTableRecord *pActVp = NULL;

      //get the *Active view port

      pDb->getViewportTable(pVpT,AcDb::kForRead);

      pVpT->getAt(_T("*Active"),pActVp,AcDb::kForWrite);

      pVpT->close();  

     

      //assume we need to orbit the view direction

      // along (1,0,0) in angle 30 degree.



      AcGeVector3d oOldDir =  pActVp->viewDirection();

      AcGeMatrix3d oM;

      oM.setToRotation(30 * 3.1415926 / 180,AcGeVector3d(1,0,0),AcGePoint3d::kOrigin);

      oOldDir.transformBy(oM);

      pActVp->setViewDirection(oOldDir);      



      //close the Active viewport

      pActVp->close();  

      //update the viewport

      acedVportTableRecords2Vports();

}[/code]