[JAVA3D] How do I pick and delete objects? Any example?

[Qiuli Sun]

Hi,

I have some trouble in picking and removing the object. My structure is
simple -  a TransformGroup node, under which I have many BranchGroup nodes.
I want to pick and delete one BrachGroup node one time. I can not get access
to BrachGroup node, so I can not use removeChild() and detach().

My code is as following:

BranchGroup pickBG =
(BranchGroup) pickResult.getNode (PickResult.BRANCH_GROUP);
Shape3D  shape = (Shape3D) pickResult.getNode (PickResult.SHAPE3D);
if (pickBG != null)
{ pickTG.removeChild (1);
  System.out.println("Brach");
}
if (shape != null) {
     System.out.println("Shape");
}


The problem here is that I alway got a null of 'pickBG'  while 'shape' is
not null.

Why? Any comments?

Any similar example?

Qiuli

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