[JAVA3D] Detaching (was: HELP! Re-attach of BranchGraph()...)

[Markus Junginger]

Hi everyone I had i similar problem like Lee - i was only too busy to post it. Now it seems to the right moment...   First, i have to explain a couple of things. In my program there's a "ExplosionPool" class. It has "Explosion" Objects(OrientedShape3D with a animated texture). The pool reuses Explosion objects. The Explosions are attached and detached to the live scene as needed. Okay, the weird thing was that my "Laser" objects(OrientedShape3D) disappeared sometimes after the detach() call of the Explosion object. Other scene members were still visible. *All* Laser objects were visible again, when a new Explosion was attached to the scene. It drove me nuts because i couldn't find any errors in my code or scenegraph structure. I came to the conclusion that it's a Java3D bug. Anyways, i finally found a weird work-around for that weird problem: i detached the Explosion not right away when the Explosion is over. Instead it was detached before it was going to be reused and attached again. I still don't know why it worked fine then...   Here's a "hot spot" of the code:     public synchronized void startExplosion(Vector3d position, float scaleFactor,Informable informMe)     {         Explosion ex;         if(list.isEmpty()) ex=createElement();         else ex=(Explosion)list.remove(0);         ex.reset(position,scaleFactor,informMe);         BranchGroup exBG=ex.getBranchGroup();         if(exBG.isLive()) exBG.detach();  // Does work         group.addChild(exBG);     }     protected synchronized void finishedExplosion(Explosion ex)     {         BranchGroup exBG=ex.getBranchGroup();         //if(exBG.isLive()) exBG.detach();  // Does NOT work!!         list.add(ex);     }   The .java is attached... (The complete program isn't suitable to be posted)   I hope this helps.   Regards, Markus

ExplosionPool.java