openal tutorial on osx tiger ppc

[jmo]

Hi,
I have just begun using lwjgl and wanted to try out some of the openal tutorials.  I have no problem compiling but when I attempt to run them I receive the following error:

java Lesson2
DigiCoreAudioDriver> Found 8 entries in 'SupportedApps.txt'.
java.lang.NullPointerException
       at org.lwjgl.util.WaveData.create(WaveData.java:95)
       at org.lwjgl.util.WaveData.create(WaveData.java:112)
       at Lesson2.loadALData(Lesson2.java:105)
       at Lesson2.execute(Lesson2.java:174)
       at Lesson2.main(Lesson2.java:208)
Exception in thread "main" java.lang.NullPointerException
       at Lesson2.loadALData(Lesson2.java:106)
       at Lesson2.execute(Lesson2.java:174)
       at Lesson2.main(Lesson2.java:208)

Is there an easy way to get the tutorials working?  I have found other lwjgl openal code that complies and works fine, but it's a little more than basic which makes it harder to learn from.

Thanks,
Joe

[Matzon]

if you copy the lesson2 folder to the root of your lwjgl installation and compile it, then enter the dir.
Then you should be able to issue this command to run it:

java -cp .;..\bin -Djava.library.path=..\libs\win32 Lesson2

due to some time changes you might want to change execute to this:

public void execute() {
    // Initialize OpenAL and clear the error bit.
    try {
    	AL.create();
    } catch (LWJGLException le) {
    	le.printStackTrace();
      return;
    }
    AL10.alGetError();

    // Load the wav data.
    if(loadALData() == AL10.AL_FALSE) {
      System.out.println("Error loading data.");
      return;
    }

    setListenerValues();

    AL10.alSourcePlay(source.get(0));
    
    // loop 
    long timeout = Sys.getTime() + (long)(0.1f * Sys.getTimerResolution());

    System.out.println("Press ENTER to exit");
    
    while(!kbhit()) {
    	if(Sys.getTime() > timeout) {
    		timeout = Sys.getTime() + (long)(0.1f * Sys.getTimerResolution());
    		System.out.println("move");
    		
    		sourcePos.put(0, sourcePos.get(0) + sourceVel.get(0));
    		sourcePos.put(1, sourcePos.get(1) + sourceVel.get(1));
    		sourcePos.put(2, sourcePos.get(2) + sourceVel.get(2));
    		
    		AL10.alSource(source.get(0), AL10.AL_POSITION, sourcePos);
    	}
    }
    
    killALData();
  }

[jmo]

I was able to recompile in the in the lwjgl installation directory and run it with just:
java lesson2
I know this is a noob question, but why wouldn't compiling and running the program from another directory work?  I have all my lwjgl .jars .dylibs and .jnilibs available in the classpath.
Thanks again for the help.  Everyone has obviously put a TON of time into the project.
Best,
Joe

[Matzon]

you can run it from whatever directory you like - however you need to make sure that the classfiles and/or jars are on the classpath AND that the native files are in the dir specified by java.library.path. This path is NOT the same as the classpath.