Hi,
might it be that the listener position has no effect?
Simple example: In the joal tutorial LoopingAndFadeAway the sound source is shifted at linear speed in z-direction. The sound gets quieter. If instead the source is fixed and the listener is shifted at linear speed in (-z)-direction nothing happens. Here is the tutorial source with the commented block at line 130.
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import java.nio.ByteBuffer;
import net.java.games.joal.AL;
import net.java.games.joal.ALC;
import net.java.games.joal.ALFactory;
import net.java.games.joal.util.ALut;
/**
* @author Athomas Goldberg
*
*/
public class LoopingAndFadeaway {
static int[] buffer = new int[1];
static int[] source = new int[1];
static float[] sourcePos = { 0.0f, 0.0f, 0.0f };
static float[] sourceVel = { 0.0f, 0.0f, 0.1f };
static float[] listenerPos = { 0.0f, 0.0f, 0.0f };
static float[] listenerVel = { 0.0f, 0.0f, -0.1f };
static float[] listenerOri = { 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f };
static AL al;
static ALC alc;
static int loadALData() {
if (al.alGetError() != AL.AL_NO_ERROR) {
return AL.AL_FALSE;
}
int[] format = new int[1];
int[] size = new int[1];
ByteBuffer[] data = new ByteBuffer[1];
int[] freq = new int[1];
int[] loop = new int[1];
// Load wav data into a buffer.
al.alGenBuffers(1, buffer, 0);
if (al.alGetError() != AL.AL_NO_ERROR)
return AL.AL_FALSE;
ALut.alutLoadWAVFile(
"wavdata/Footsteps.wav",
format, data, size, freq, loop);
al.alBufferData(buffer[0], format[0], data[0], size[0], freq[0]);
System.out.println("bufferID " + buffer[0]);
al.alGenSources(1, source, 0);
System.out.println("sourceID " + source[0]);
al.alSourcei(source[0], AL.AL_BUFFER, buffer[0]);
al.alSourcef(source[0], AL.AL_PITCH, 1.0f);
al.alSourcef(source[0], AL.AL_GAIN, 1.0f);
al.alSourcefv(source[0], AL.AL_POSITION, sourcePos, 0);
al.alSourcefv(source[0], AL.AL_POSITION, sourceVel, 0);
al.alSourcei(source[0], AL.AL_LOOPING, AL.AL_TRUE);
if (al.alGetError() != AL.AL_NO_ERROR) {
return AL.AL_FALSE;
}
return AL.AL_TRUE;
}
static void setListenerValues() {
al.alListenerfv(AL.AL_POSITION, listenerPos, 0);
al.alListenerfv(AL.AL_VELOCITY, listenerVel, 0);
al.alListenerfv(AL.AL_ORIENTATION, listenerOri, 0);
}
static void killAllData() {
al.alDeleteBuffers(1, buffer, 0);
al.alDeleteSources(1, source, 0);
}
public static void main(String[] args) {
try {
ALut.alutInit();
al = ALFactory.getAL();
} catch(Exception e) {
e.printStackTrace();
return;
}
if(loadALData() == AL.AL_FALSE) {
System.exit(1);
};
al.alSourcePlay(source[0]);
long startTime = System.currentTimeMillis();
long elapsed = 0;
long ticker = 0;
long lastTime = 0;
while (elapsed < 10000) {
elapsed = System.currentTimeMillis() - startTime;
if (ticker > 100)
{
ticker = 0;
// sourcePos[0] += sourceVel[0];
// sourcePos[1] += sourceVel[1];
// sourcePos[2] += sourceVel[2];
// al.alSourcefv(source[0], AL.AL_POSITION, sourcePos, 0);
listenerPos[0] += listenerVel[0];
listenerPos[1] += listenerVel[1];
listenerPos[2] += listenerVel[2];
al.alListenerfv(AL.AL_POSITION, listenerPos, 0);
}
ticker += System.currentTimeMillis() - lastTime;
lastTime = System.currentTimeMillis();
}
ALut.alutExit();
}
}
What did I not mention? The listener position is always at default vec3(0.0)…
Any suggestions?
Thanks,
Achilleos.