Hi Matthieu,
>From the line numbers, it looks like you are using Java 3D 1.2.1.
Can you try this on Java 3D 1.3 beta2.
Thanks,
Doug Twilleager
Java 3D Team
Sun Microsystems
>Subject: [JAVA3D] Pb to initialize j3d.sound
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>
>Hi,
>I get a exception when I'm trying to initialize J3d.Sound. I haven't found any
examples or tutorials. This is the exception thrown after a call to
System.out.println("Channels used for sound : " + s.getNumberOfChannelsUsed()) :
>
>
>java.lang.NullPointerException at
javax.media.j3d.SoundRetained.getNumberOfChannelsUsed(SoundRetained.java:779) at
javax.media.j3d.Sound.getNumberOfChannelsUsed(Sound.java:845) at
montageHansatome.createSceneGraph(montageHansatome.java:140) at
montageHansatome.init(montageHansatome.java:68) at
sun.applet.AppletPanel.run(Unknown Source) at java.lang.Thread.run(Unknown
Source)
>
>
>This is my code :
>
> PhysicalEnvironment pe = simpleU.getViewer().getPhysicalEnvironment();
> AudioEngine ae = new AudioEngine(pe);
> pe.setAudioDevice(ae);
>
> if (ae.initialize())
> System.out.println("audio initialized");
> else
> System.out.println("audio not initialized");
>
> System.out.println("Nb channels available : " + ae.getChannelsAvailable());
> System.out.println("PlaybackType : " + ae.getAudioPlaybackType());
>
> MediaContainer mediaContainer = new MediaContainer(getCodeBase() +
"/test.wav");
> Sound s = new BackgroundSound(mediaContainer, 1.0f);
> s.setLoop(100);
> s.setSchedulingBounds(bounds);
> System.out.println("Channels used for sound : " +
s.getNumberOfChannelsUsed());
> s.setEnable(true);
>
> if (s.isReady())
> System.out.println("ready");
> else
> System.out.println("not ready");
>
> objRoot.addChild(s);
>
>
>If I commentthe line System.out.println("Channels used for sound : " +
s.getNumberOfChannelsUsed()), I get another exception and the screen is black :
>
>java.lang.ClassCastException: com.sun.j3d.audioengines.AudioEngine
> at javax.media.j3d.SoundScheduler.checkAudioDevice3D(SoundScheduler.java:2566)
> at javax.media.j3d.SoundScheduler.attachSoundData(SoundScheduler.java:2612)
> at javax.media.j3d.SoundScheduler.processSoundAtom(SoundScheduler.java:1285)
> at
javax.media.j3d.SoundScheduler.calcSchedulingAction(SoundScheduler.java:1577)
> at javax.media.j3d.SoundScheduler.renderChanges(SoundScheduler.java:787)
> at javax.media.j3d.SoundScheduler.processMessages(SoundScheduler.java:229)
> at javax.media.j3d.StructureUpdateThread.doWork(StructureUpdateThread.java:83)
> at javax.media.j3d.J3dThread.run(J3dThread.java:256)
>
>Thanks for your help
>Matthieu Beghin
>
>
>
>
>
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