[JAVA3D] help

[Sheng Feng Qin]

Hi, I am a new comer in java 3D. I seek for helping in Java3D.  I have read Java3D tutorials. But, It seems that there is no example of showing how to construct tree-structure in geometry. For example, a father (a box) has a son (a cylinder, doesn't sound son!). i don't know how to build a scence like                                                   Universer                                                                 BG 1            BG2                        BG3                                                 BG1-1        BG1-2   ....                                BG3-1        BG3-2      BG3-3..... ...........................................     Here Bg1-1 and BG1-2 are children of BG1, How can I add a child BranchGroup to a father BG node with their own local co-ordinate system (Locale).         Shengfeng