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  ObjectFile.load(url).getNamedObjects()  (Read 1783 times)
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Offline bienator

Senior Member




OutOfCoffeeException


« Posted 2002-12-08 10:12:23 »

Can anyone help me?
I tryed this code and the VM throws a MultipleParentExeption


...

ObjectFile file = new ObjectFile();

Hashtable objects;
try {
objects = file.load(url).getNamedObjects();              
}
catch (FileNotFoundException e) {
System.err.println(e);
System.exit(1);
}
catch (ParsingErrorException e) {
System.err.println(e);
System.exit(1);
}
catch (IncorrectFormatException e) {
System.err.println(e);
System.exit(1);
}

Enumeration e = objects.keys();

while(e.hasMoreElements()) {

 String name = (String)e.nextElement();
 Shape3D part = (Shape3D)objects.get(name);

 if (name.equals("gun")) {
      System.out.println("set gun");
      this.gun = new TransformGroup();
      this.gun.addChild(part);
 }else if (name.equals("body")) {
      System.out.println("set body");
      this.robotbody = new TransformGroup();
      this.robotbody.addChild(part);
 }else if...

}
...

=>
set gun
javax.media.j3d.MultipleParentException: Group.addChild: child already has a parent
     at javax.media.j3d.GroupRetained.checkValidChild(GroupRetained.java:440)
     at javax.media.j3d.GroupRetained.addChild(GroupRetained.java:449)
     at javax.media.j3d.Group.addChild(Group.java:266)
     at engine.object.Robot.init(Robot.java:60)
     at engine.object.Robot.<init>(Robot.java:36)
     at engine.object.ObjectManager.addRobot(ObjectManager.java:41)
     at engine.Metaversum.createSceneGraph(Metaversum.java:134)
     at engine.Metaversum.init(Metaversum.java:71)
     at engine.Metaversum.<init>(Metaversum.java:54)
     at engine.Driver.main(Driver.java:50)
Exception in thread "main"


Is it not possible to split a obj file in different Transformgroups?
If yes, please let me know.

Offline Herkules

Senior Member




Friendly fire isn't friendly!


« Reply #1 - Posted 2002-12-08 11:00:19 »

When loading a model, all nodes already are organized in a scenegraph and therefor have a parent.
So you have to detach it first before you can add it to you transformgroup.


HARDCODE    --     DRTS/FlyingGuns/JPilot/JXInput  --    skype me: joerg.plewe
Offline bienator

Senior Member




OutOfCoffeeException


« Reply #2 - Posted 2002-12-08 12:51:07 »

Thank you for the answer.

But how should I detach the childs?
getNamedObjects() returns Shape3D

Bienator

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Offline bienator

Senior Member




OutOfCoffeeException


« Reply #3 - Posted 2002-12-09 10:56:57 »

IT WORKS!!! Smiley

I have only to write
 object.getSceneGroup().removeAllChildren()
after I have the Hashtable with
 object.getNamedObjects()

Thank you again

Bienator

Offline Herkules

Senior Member




Friendly fire isn't friendly!


« Reply #4 - Posted 2002-12-09 11:52:05 »

That's how it's meant to be.
The question remains why you load a model with submodels where you are only interested in the submodels. You are creating some overhead....

HARDCODE    --     DRTS/FlyingGuns/JPilot/JXInput  --    skype me: joerg.plewe
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