CATIA投影

我想在Party中从3D中，投影到Drawing中，但是老是不成功，程序也不报错，麻烦各位高手帮小弟看看把。谢谢！
CATDocument *pDocPart = NULL;
     if( SUCCEEDED(CATDocumentServices::OpenDocument(pfileNamePart, pDocPart)) )
   {
    CATIDftDrawing *piDftDrawing = NULL;
    CATIDftSheet* piDftSheet=NULL;
    CATIDftView* piDftView=NULL;
    CATIDftViewMakeUp *piDftViewMU =NULL;
    CATIView* piNewView = NULL;
    CATIContainer* spDrwCont = NULL;
    CATIPrtContainer* piPrtCont = NULL;

     CATIDftDocumentServices *piDftDocServices = NULL;
  rc = pNewDoc->QueryInterface(IID_CATIDftDocumentServices, (void **)&piDftDocServices);
  
  if(FAILED(rc) || piDftDocServices == NULL)
  {
   cout<<"==> Query CATIDftDocumentServices Error !"<<endl;
   return 3;
  }
  
  piDftDocServices->GetDrawing(IID_CATIDftDrawing, (void **)&piDftDrawing);
  piDftDocServices->Release();
  piDftDocServices = NULL;
  if(piDftDrawing == NULL)
  {
   cout<<"==> Get Drafting Drawing Error!"<<endl;
   return 4;
  }
  
  CATISpecObject *piSpecObj=NULL;
  rc=piDftDrawing->QueryInterface(IID_CATISpecObject,(void **)&piSpecObj);
  if(FAILED(rc))
  {
   cout<<"==> Get Drafting Drawing Error!"<<endl;
   return 5;
  }
  
  spDrwCont = piSpecObj->GetFeatContainer();

  piSpecObj -> Release();
  piSpecObj=NULL;
  if(spDrwCont == NULL_var)
  {
   cout<<"==> Get Container Error!"<<endl;
   return 6;
  }
        CATInit *pDocAsInit = NULL;
     pDocPart->QueryInterface(IID_CATInit, (void**)&pDocAsInit) ;
  if( pDocAsInit == NULL )
  {
   cout<<"Get CATInit Error!"<<endl;
  }
  piPrtCont = (CATIPrtContainer*)pDocAsInit->GetRootContainer("CATIPrtContainer");
  pDocAsInit->Release(); pDocAsInit = NULL ;
  CATIPrtPart_var spPart ( piPrtCont->GetPart() );
  if(spPart == NULL_var)
  {
   cout<<"Get Part Error!"<<endl;
  }

  CATListValCATISpecObject_var spPlaneList;
        CATIDescendants *piDescPart = NULL;
  spPart->QueryInterface(IID_CATIDescendants, (void**)&piDescPart) ;
  piDescPart->GetAllChildren("CATPlane",spPlaneList);
  piDescPart->Release();piDescPart = NULL;
  if(spPlaneList.Size())
   cout<<"Number is:"<<spPlaneList.Size()<<endl;
  else
   cout<<"Number is NULL"<<endl;
  CATPlane_var spProjectPlane;
  rc=spPlaneList[2]->QueryInterface(IID_CATPlane, (void**)&spProjectPlane);
  if(FAILED(rc)||spProjectPlane==NULL_var)
  {
   cout<<"Query Error!"<<endl;
  }
  CATMathPlane iMathPlane = spProjectPlane->GetAxis();
  CATIAlias *piPlaneAlias = NULL;
  spProjectPlane->QueryInterface(IID_CATIAlias, (void**)&piPlaneAlias);
  CATUnicodeString PlaneName = piPlaneAlias->GetAlias();
  cout<<"PlaneName IS:"<<PlaneName.ConvertToChar()<<endl;
   
  //Add the current sheet.
  cout<<"==> Get the current Active sheet!"<<endl;
  piDftDrawing->GetActiveSheet(&piDftSheet);
  piDftDrawing -> Release();
  piDftDrawing = NULL;
  if(piDftSheet == NULL)
  {
   cout<<"==> Get Active Sheet Error!"<<endl;
   return 8;
  }
  
  //Set New Sheet Format
  CATIDftSheetFormat_var spDftSheetFormat = NULL_var;
  rc= piDftSheet->QueryInterface(IID_CATIDftSheetFormat, (void **)&spDftSheetFormat);
  if(FAILED(rc))
  {
   cout<<"==> Query DftSheetFormat Error!"<<endl;
   return 9;
  }
  
  if (FAILED(spDftSheetFormat->SetSheetFormat(myFormatName)))
  {
   cout<<"==> Set Sheet Format Error!"<<endl;
   piDftSheet->Release();
   piDftSheet=NULL;
   return 10;
  }
// Create a view with Make Up
CATIDrwFactory_var spDrwFact = spDrwCont;
CATIDftViewMakeUp* piNewViewMU = NULL;
if(spDrwFact != NULL_var)
{
  rc = spDrwFact -> CreateViewWithMakeUp(IID_CATIDftViewMakeUp, (void **)&piNewViewMU);
  if(FAILED(rc)||!piNewViewMU)
  {
   cout<<"==> CreateViewWithMakeUp Error!"<<endl;
   piDftSheet->Release();
   piDftSheet=NULL;
   return 12;
  }
  //piNewViewMU->SetAxisData(0.0,0.0);
  if(piDftSheet)
   piDftSheet->AddView(piNewViewMU);
  CATIView* piNewView = NULL;
  rc=piNewViewMU->GetView(&piNewView);
  if(FAILED(rc)||!piNewView)
  {
   cout<<"==> CreateViewWithMakeUp Error!"<<endl;
   piNewViewMU->Release();
   piNewViewMU=NULL;
   piDftSheet->Release();
   piDftSheet=NULL;
   return 13;
  }
  //Link Object
  piNewView->SetViewType(FrontView);
  CATILinkableObject_var spLinkObject = NULL_var;
  pDocPart->QueryInterface (IID_CATILinkableObject,(void**)&spLinkObject);
  if(spLinkObject == NULL_var)
  {
   cout<<"Filed to get CATILinkObject!"<<endl;
   return 14;
  }
  CATDocument* pCurrDocument=spLinkObject->GetDocument();
  if(pCurrDocument==NULL)
   cout<<"error!"<<endl;
  else
   cout<<pCurrDocument->DisplayName().ConvertToChar()<<endl;
  piNewView->SetDoc(spLinkObject);
  
  //Set Project Plane
  CATIGenerSpec_var spGenerSpec=piNewView -> GetGenerSpec();
  if(spGenerSpec == NULL_var)
   cout<<"error!"<<endl;
  spGenerSpec -> SetProjPlane(iMathPlane);
  //Update
  //piNewView -> Update(NULL_var);
  piNewView->Release();
  piNewView = NULL;
  piNewViewMU->Release();
  piNewViewMU = NULL;
  }
  piDftSheet -> Release();
  piDftSheet = NULL;
   }

不懂

CATILinkableObject_var spLinkObject = NULL_var;
pDocPart->QueryInterface (IID_CATILinkableObject,(void**)&spLinkObject);
从pDocPart到spLinkObject 这有点问题