如何使用CATIMechanicalRootFactory创建特征！

HRESULT rc;
   
CATFrmEditor * pEditor   = GetEditor();
if (NULL == pEditor)
{
  return;
}
   
CATDocument *pDoc = pEditor->GetDocument();
if (NULL == pDoc)
{
  return;
}
   
CATInit *spInitOnDoc = NULL;
rc = pDoc -> QueryInterface (IID_CATInit, (void**) &spInitOnDoc);
if (E_NOINTERFACE == rc)
{
  Notify("NoCATInit");
  return;
}
CATIPrtContainer *pIPrtCont = NULL ;
pIPrtCont = (CATIPrtContainer*)
  spInitOnDoc->GetRootContainer("CATIPrtContainer");
if (NULL == pIPrtCont )
{
  return;
}
  CATISpecObject_var spSpecObjectOnPart = pIPrtCont->GetPart();
if (NULL_var == spSpecObjectOnPart)
{
  return;
}

CATIMechanicalRootFactory *pIMechanicalRootFactoryOnPart = NULL ;
rc = spSpecObjectOnPart->QueryInterface(IID_CATIMechanicalRootFactory,
  (void**)&pIMechanicalRootFactoryOnPart);
if (SUCCEEDED(rc ))
{
  Notify("SUCCEEDED");
}
else if (E_FAIL == rc )
{
  Notify("E_FAIL == tc");
  return;
}
else if(E_NOINTERFACE == rc )
{
  Notify("E_NOINTERFACE == rc ");
  return;
}

在创建一个新的MechanicalTool Feature或者是Geometrical Set时，要用到CATIMechanicalRootFactory 接口，但按照上面的代码，总显示接口不存在！不知是什么原因，但可以通过CATIDesendants获得MechanicalPart下面的特征！

楼主可以尝试一下
CATIPrtContainer *pIPrtCont = NULL ;
pIPrtCont = (CATIPrtContainer*)   spInitOnDoc->GetRootContainer("CATIPrtContainer");
if (NULL == pIPrtCont )
{
  return;
}

CATIPrtPart_var spPrtPart( pIPrtCont->GetPart() );

再可以将它直接付给CATIMechanicalRootFactory
CATIMechanicalRootFactory_var  spMechanicalRootFactoryOnPart = spPrtPart;
再用spMechanicalRootFactoryOnPart 来创建特征。我这样实现过，楼主可以试试

我程序里面的rc = spSpecObjectOnPart->QueryInterface(IID_CATIMechanicalRootFactory,
  (void**)&pIMechanicalRootFactoryOnPart);
这段程序改为rc = pIPrtCont->QueryInterface(IID_CATIMechanicalRootFactory,
  (void**)&pIMechanicalRootFactoryOnPart);
就可以了，还是谢谢你哈！