how to get the desired node?

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Felix Yprj2316 Keung (yprj2316++at++cse.cuhk.edu.hk)
Thu, 5 Mar 1998 21:23:26 +0800 (HKT)

Hi all,
        Here is the part of my scene graph :

                / \
                           / \
                          sw sw2
                          /\ /\
                         / \ / \
                   obj obj obj obj

        where sw and sw2 are the pfSwitch nodes .
        Now when I traverse the tree and one of the switch node will be get , how to detect which the switch ,sw or sw2, of the node is?
         
        I have tried to use pfCompare , but it just tells it is a switch type or not . I want the result to tell sw or sw2 that the get node belongs to .

        How to detect it ?

Thanks
             
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