[JAVA3D] How can I give transparency to a VRML object?

[Melina Alberio]

Hello,
I'm trying to set transparency to a VRML object. But all the Java 3D
examples I saw, use Appearance, TransparencyAttributes and
TransparencyInterpolator. But I don't know how to set Appearance for a Scene
object.
Pieces of my code Below:


private Scene scene;
private BranchGroup sceneBranchGroup = null;




scene = createVRML();
sceneBranchGroup = transparencyVRML(scene);



protected Scene createVRML( )
 {
  VrmlLoader loader = new VrmlLoader();
  Scene s = null;

  try
  {
   s = loader.load("h16.WRL");
  }
  catch(Exception e)
  {
   e.printStackTrace();
   System.exit(-1);
  }

  return s;
 }




protected BranchGroup transparencyVRML(Scene s)
 {
 BranchGroup objRoot = new BranchGroup();

  // create target Transparency with Capabilities
        TransparencyAttributes objTransp = new TransparencyAttributes();
        objTransp.setCapability(TransparencyAttributes.ALLOW_VALUE_WRITE);
        objTransp.setTransparencyMode(TransparencyAttributes.BLENDED);
        objTransp.setTransparency(0.7f);


        // create Alpha
        Alpha alpha = new Alpha (-1,
                                 Alpha.INCREASING_ENABLE +
Alpha.DECREASING_ENABLE,
                                 0, 0, 2000, 0, 1000, 2000, 0, 1000);

        // create transparency interpolator
        TransparencyInterpolator traInt = new TransparencyInterpolator
(alpha, objTransp);
        traInt.setSchedulingBounds(bounds);

        objRoot.addChild(s.getSceneGroup());
        Appearance transpAppear = (????) ;
       // above I have to set the appearance of object s
        transpAppear.setTransparencyAttributes(objTransp);
        objRoot.addChild(traInt);

        objRoot.setUserData( "Transparency" );

        return objRoot;

 }

Please, help me. I'm trying for weeks to solve this problem.
Thanks, Melina

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