Work with IFC Databases

To create a new IFC database, call the createDatabase() method of the customer service class instance declared in the Ifc/Examples/Common/IfcExamplesCommon.h header file. The MyServices class is based on the ExSystemServices and OdExIfcHostAppServices classes, which implement platform-based functionality for IFC SDK based applications:


class MyServices : public ExSystemServices, public OdExIfcHostAppServices
{
protected:
  ODRX_USING_HEAP_OPERATORS(ExSystemServices);
  OdGsDevicePtr gsBitmapDevice(OdRxObject* /*pViewObj*/ = NULL,
    OdDbBaseDatabase* /*pDb*/ = NULL,
    OdUInt32 /*flags*/ = 0)
  {
    try
    {
      OdGsModulePtr pGsModule = ::odrxDynamicLinker()->loadModule(OdWinBitmapModuleName);
      return pGsModule->createBitmapDevice();
    }
    catch(const OdError&)
    {
    }
    return OdGsDevicePtr();
  }

public:

  virtual OdString findFile(
    const OdString& filename,
    OdDbBaseDatabase* pDb,
    FindFileHint hint)
  {
    return filename;
  }

  virtual const OdString program()
  {
    return OdString::kEmpty;
  }

  virtual const OdString product()
  {
    return OdString::kEmpty;
  }

  virtual const OdString companyName()
  {
    return OdString::kEmpty;
  }

  virtual bool ttfFileNameByDescriptor(
    const OdTtfDescriptor& description,
    OdString& filename)
  {
    return false;
  }

  virtual OdString getAlternateFontName() const
  {
    return OdString::kEmpty;
  }

  virtual OdString getFontMapFileName() const
  {
    return OdString::kEmpty;
  }

  virtual OdString getPreferableFont(
    const OdString& fontName,
    OdFontType fontType)
  {
    return OdString::kEmpty;
  }

  virtual OdString getSubstituteFont(
    const OdString& fontName,
    OdFontType fontType) 
  {
    return OdString::kEmpty;
  }

};

The createDatabase() method returns a smart pointer to the OdIfcFile object. Using this smart pointer, call the readFile() method to load the contents of an IFC file to the created object.


    
      OdStaticRxObject< MyServices > svcs;
      OdString ifcFileName(argv[1]);

      OdIfc::OdIfcFilePtr pDatabase = svcs.createDatabase(kScmUndefined);
      OdResult res = pDatabase->readFile(ifcFileName);

      if (res == eOk)
      {
        odPrintConsoleString(L"\nFile opened successfully.");
      }
      else
      {
        odPrintConsoleString(L"\nFile open error.");
      }

To write the contents of an IFC file object, use the writeFile() method of the OdIfcFile object:


    OdStaticRxObject < MyServices > svcs;
    
    OdIfc::OdIfcFilePtr pDb = svcs.createDatabase();
    if (!pDb.isNull())
    {
      
      //Add here some functionality for filling the header section and model objects

      pDb->writeFile(szTargetFileName, true);
    }

See Also