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[solved] lwjgl-2.6 sample lesson3; for the sake of completeness ;)

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The lesson was working from the beginning. I just fixed the core temperature problem and the termination error:

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/*
 * Copyright (c) 2004 LWJGL Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'LWJGL' nor the names of
 *   its contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
import java.io.IOException;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.util.Random;

import org.lwjgl.BufferUtils;
import org.lwjgl.LWJGLException;
import org.lwjgl.openal.AL;
import org.lwjgl.openal.AL10;
import org.lwjgl.util.WaveData;

/**
 * $Id$
 * <p>
 * Lesson 3: Multiple Sources
 * </p>
 * @author Brian Matzon <brian@matzon.dk>
 * @version $Revision$
 */
public class Lesson3 {
 
  /** Maximum data buffers we will need. */
  public static final int NUM_BUFFERS = 3;
 
  /** Maximum emissions we will need. */
  public static final int NUM_SOURCES = 3;
 
  /** Index of battle sound */
  public static final int BATTLE = 0;
 
  /** Index of gun 1 sound */
  public static final int GUN1 = 1;
 
  /** Index of gun 2 sound */
  public static final int GUN2 = 2;
 
  /** Buffers hold sound data. */
  IntBuffer buffer = BufferUtils.createIntBuffer(NUM_BUFFERS);

  /** Sources are points emitting sound. */
  IntBuffer source = BufferUtils.createIntBuffer(NUM_BUFFERS);
 
  /** Position of the source sound. */
  FloatBuffer sourcePos = BufferUtils.createFloatBuffer(3*NUM_BUFFERS);

  /*
   * These are 3D cartesian vector coordinates. A structure or class would be
   * a more flexible of handling these, but for the sake of simplicity we will
   * just leave it as is.
   */ 
 
  /** Velocity of the source sound. */
  FloatBuffer sourceVel = BufferUtils.createFloatBuffer(3*NUM_BUFFERS);

  /** Position of the listener. */
  FloatBuffer listenerPos = BufferUtils.createFloatBuffer(3).put(new float[] { 0.0f, 0.0f, 0.0f });

  /** Velocity of the listener. */
  FloatBuffer listenerVel = BufferUtils.createFloatBuffer(3).put(new float[] { 0.0f, 0.0f, 0.0f });

  /** Orientation of the listener. (first 3 elements are "at", second 3 are "up")
      Also note that these should be units of '1'. */
  FloatBuffer listenerOri = BufferUtils.createFloatBuffer(6).put(new float[] { 0.0f, 0.0f, -1.0f,  0.0f, 1.0f, 0.0f });
 
  public Lesson3() {
    // CRUCIAL!
    // any buffer that has data added, must be flipped to establish its position and limits
    listenerPos.flip();
    listenerVel.flip();
    listenerOri.flip();
  }
 
  /**
   * boolean LoadALData()
   *
   *  This function will load our sample data from the disk using the Alut
   *  utility and send the data into OpenAL as a buffer. A source is then
   *  also created to play that buffer.
   */
  int loadALData() {
    // Load wav data into a buffers.
    AL10.alGenBuffers(buffer);

    if(AL10.alGetError() != AL10.AL_NO_ERROR)
      return AL10.AL_FALSE;

    WaveData waveFile = WaveData.create("Battle.wav");
    AL10.alBufferData(buffer.get(BATTLE), waveFile.format, waveFile.data, waveFile.samplerate);
    waveFile.dispose();
   
    waveFile = WaveData.create("Gun1.wav");
    AL10.alBufferData(buffer.get(GUN1), waveFile.format, waveFile.data, waveFile.samplerate);
    waveFile.dispose();

    waveFile = WaveData.create("Gun2.wav");
    AL10.alBufferData(buffer.get(GUN2), waveFile.format, waveFile.data, waveFile.samplerate);
    waveFile.dispose();
   

    // Bind buffers into audio sources.
    AL10.alGenSources(source);

    if(AL10.alGetError() != AL10.AL_NO_ERROR)
      return AL10.AL_FALSE;

    AL10.alSourcei(source.get(BATTLE), AL10.AL_BUFFER,   buffer.get(BATTLE) );
    AL10.alSourcef(source.get(BATTLE), AL10.AL_PITCH,    1.0f          );
    AL10.alSourcef(source.get(BATTLE), AL10.AL_GAIN,     1.0f          );
    AL10.alSource (source.get(BATTLE), AL10.AL_POSITION, (FloatBuffer) sourcePos.position(BATTLE*3));
    AL10.alSource (source.get(BATTLE), AL10.AL_VELOCITY, (FloatBuffer) sourceVel.position(BATTLE*3));
    AL10.alSourcei(source.get(BATTLE), AL10.AL_LOOPING,  AL10.AL_TRUE  );
   
    AL10.alSourcei(source.get(GUN1), AL10.AL_BUFFER,   buffer.get(GUN1) );
    AL10.alSourcef(source.get(GUN1), AL10.AL_PITCH,    1.0f          );
    AL10.alSourcef(source.get(GUN1), AL10.AL_GAIN,     1.0f          );
    AL10.alSource (source.get(GUN1), AL10.AL_POSITION, (FloatBuffer) sourcePos.position(GUN1*3));
    AL10.alSource (source.get(GUN1), AL10.AL_VELOCITY, (FloatBuffer) sourceVel.position(GUN1*3));
    AL10.alSourcei(source.get(GUN1), AL10.AL_LOOPING,  AL10.AL_FALSE  );
   
    AL10.alSourcei(source.get(GUN2), AL10.AL_BUFFER,   buffer.get(GUN2) );
    AL10.alSourcef(source.get(GUN2), AL10.AL_PITCH,    1.0f          );
    AL10.alSourcef(source.get(GUN2), AL10.AL_GAIN,     1.0f          );
    AL10.alSource (source.get(GUN2), AL10.AL_POSITION, (FloatBuffer) sourcePos.position(GUN2*3));
    AL10.alSource (source.get(GUN2), AL10.AL_VELOCITY, (FloatBuffer) sourceVel.position(GUN2*3));
    AL10.alSourcei(source.get(GUN2), AL10.AL_LOOPING,  AL10.AL_FALSE  );   
   
    // Do another error check and return.
    if(AL10.alGetError() == AL10.AL_NO_ERROR)
      return AL10.AL_TRUE;

    return AL10.AL_FALSE;
  } 
 
  /**
   * void setListenerValues()
   *
   *  We already defined certain values for the Listener, but we need
   *  to tell OpenAL to use that data. This function does just that.
   */
  void setListenerValues() {
    AL10.alListener(AL10.AL_POSITION,    listenerPos);
    AL10.alListener(AL10.AL_VELOCITY,    listenerVel);
    AL10.alListener(AL10.AL_ORIENTATION, listenerOri);
  } 

  /**
   * void killALData()
   *
   *  We have allocated memory for our buffers and sources which needs
   *  to be returned to the system. This function frees that memory.
   */
  void killALData() {
    AL10.alDeleteSources(source);
    AL10.alDeleteBuffers(buffer);
  }
 
  /**
   *  Check for keyboard hit
   */ 
  private boolean kbhit() {
    try {
      return (System.in.available() != 0);
    } catch (IOException ioe) {
    }
    return false;
  } 
 
  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(BATTLE));
   
    // loop
    int play;
    Random random = new Random();

    System.out.println("Press ENTER to exit");
   
    while(!kbhit()) {
      for(int i=1; i<NUM_SOURCES; i++) {
        play = AL10.alGetSourcei(source.get(i), AL10.AL_SOURCE_STATE);
       
        if(play != AL10.AL_PLAYING) {
          double theta = (double) (random.nextInt() % 360) * 3.14 / 180.0;
         
          sourcePos.put(i*3+0, -(float) (Math.cos(theta)));
          sourcePos.put(i*3+1, -(float) (random.nextInt()%2));
          sourcePos.put(i*3+2, -(float) (Math.sin(theta)));
         
          AL10.alSource(source.get(i), AL10.AL_POSITION, (FloatBuffer) sourcePos.position(i*3));
          AL10.alSourcePlay(source.get(i));         
        }
      }
      try{
          Thread.sleep(100);
          }catch(InterruptedException e){
          System.out.println("Sleep Interrupted");
      }
    }
    killALData();
    AL.destroy();
  }
 
  public static void main(String[] args) {
    new Lesson3().execute();   
  }
}
Regards. Cottonwood.

*

Offline kappa

  • *****
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Re: [solved] lwjgl-2.6 sample lesson3; for the sake of completeness ;)
« Reply #1 on: December 14, 2010, 22:44:14 »
nice work.

You could update the lwjgl wiki too, that way others can benefit from and find your hard work much more quickly.  ;)

thx.