/**
* Calculates the panning of this Source between fully left (-1.0f) and fully right (1.0f)
*
* <p>Calculated internally from the relative positions of this source and the listener.
*/
protected void calculatePan() {
Vector3f side = new Vector3f();
side.cross(activeAudioListener.getOrientation(UP), activeAudioListener.getOrientation(AT));
side.normalize();
Vector3f vecX = new Vector3f(this.getCurrentPosition());
Vector3f vecZ = new Vector3f(this.getCurrentPosition());
float x = vecX.dot(side);
float z = vecZ.dot(activeAudioListener.getOrientation(AT));
float angle = (float) Math.atan2(x, z);
float pan = (float) -Math.sin(angle);
// If playing, update the pan
if (audioChannel != null) {
audioChannel.setPan(pan);
}
if (log.isDebugEnabled()) {
log.debug("Set pan of JavaSoundAudioSource " + this.getSystemName() + " to " + pan);
}
}
@Override
protected void calculateGain() {
// Calculate distance from listener
Vector3f distance = new Vector3f(this.getCurrentPosition());
if (!this.isPositionRelative()) {
distance.sub(activeAudioListener.getCurrentPosition());
}
float distanceFromListener = (float) Math.sqrt(distance.dot(distance));
if (log.isDebugEnabled()) {
log.debug(
"Distance of JavaSoundAudioSource "
+ this.getSystemName()
+ " from Listener = "
+ distanceFromListener);
}
// Default value to start with (used for no distance attenuation)
float currentGain = 1.0f;
if (InstanceManager.audioManagerInstance().getActiveAudioFactory().isDistanceAttenuated()) {
// Calculate gain of this source using clamped inverse distance
// attenuation model
distanceFromListener = Math.max(distanceFromListener, this.getReferenceDistance());
if (log.isDebugEnabled()) {
log.debug(
"After initial clamping, distance of JavaSoundAudioSource "
+ this.getSystemName()
+ " from Listener = "
+ distanceFromListener);
}
distanceFromListener = Math.min(distanceFromListener, this.getMaximumDistance());
if (log.isDebugEnabled()) {
log.debug(
"After final clamping, distance of JavaSoundAudioSource "
+ this.getSystemName()
+ " from Listener = "
+ distanceFromListener);
}
currentGain =
activeAudioListener.getMetersPerUnit()
* (this.getReferenceDistance()
/ (this.getReferenceDistance()
+ this.getRollOffFactor()
* (distanceFromListener - this.getReferenceDistance())));
if (log.isDebugEnabled()) {
log.debug(
"Calculated for JavaSoundAudioSource "
+ this.getSystemName()
+ " gain = "
+ currentGain);
}
// Ensure that gain is between 0 and 1
if (currentGain > 1.0f) {
currentGain = 1.0f;
} else if (currentGain < 0.0f) {
currentGain = 0.0f;
}
}
// Finally, adjust based on master gain for this source, the gain
// of listener and any calculated fade gains
currentGain *= this.getGain() * activeAudioListener.getGain() * this.getFadeGain();
// If playing, update the gain
if (audioChannel != null) {
audioChannel.setGain(currentGain);
if (log.isDebugEnabled()) {
log.debug(
"Set current gain of JavaSoundAudioSource "
+ this.getSystemName()
+ " to "
+ currentGain);
}
}
}
public void audioChanged(AudioEvent ev) {
for (AudioListener l : cowal) {
l.audioChanged(ev);
}
}
