Re: [JAVA3D] Compile() and live

[Kevin Glass]

tony Lincoln wrote:

Dear friends,

I want to remove one child from TransformGroup(TG) by
pressing one button, codes like this:
[/CODES]
class AWTInteractionBehavior extends Behavior
implements ActionListener {
   private TransformGroup transformGroup;
   private BranchGroup    BG;
   // create a new AWTInteractionBehavior
   public AWTInteractionBehavior(
        BranchGroup bg,
        TransformGroup tg) {
       BG = bg;
       BG.setCapability(BranchGroup.ALLOW_DETACH);
       BG.setCapability(Group.ALLOW_CHILDREN_WRITE);
       BG.setCapability(Group.ALLOW_CHILDREN_EXTEND
);
//              BG.detach();

       transformGroup = tg;
       transformGroup.setCapability(
Group.ALLOW_CHILDREN_WRITE );
   }
}
   // processStimulus to rotate the cube
   public void processStimulus(Enumeration criteria)
{
       angle += Math.toRadians(10.0);
       trans.rotY(angle);
       transformGroup.setTransform(trans);
       wakeupOn(criterion);
//      BG.compile();

//      BG.detach();

       transformGroup.removeChild(0);
       transformGroup.addChild(new Sphere(0.5f));
   }
...
[/CODES]
the error is :
javax.media.j3d.RestrictedAccessException: Group: only
a BranchGroup node may be removed.
Actually I want to remove TG from a BG(BranchGroup). I
set the BG ability and tried to detach it. But it can
not work, and I really wonder why. Should I write
removeChild() in method processStimulus()? Maybe I
should not and was wrong here.
Do you have any idea about it? Where should I write
the methods detach(), compile() and removeChild()? And
what is the relationship among detach(),live,
compile() and remove()? I am really confused!
Thank you for your reading.
best regards.
tony
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I don't think you can remove TG from BGs. The DETACH capability allows
the branch group you set it on to be detached, not things in it to be
detached. You'll need to put your TG in its own BG and detach that instead.
Kev

--
Jose UML - http://www.newdawnsoftware.com/jose
Pondering RPG - http://pondering.newdawnsoftware.com
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