//Remove a HDR audio source to the collection
public void RemoveAudioSource(HDRAudioSource source)
{
int index = AudioSources.FindIndex(p => p.Audio == source);
if (index != -1)
{
AudioSources.RemoveAt(index);
}
}
public AudioTuple(HDRAudioSource source)
{
Audio = source;
//ActualLoudness = source.Decibel;
//DynamicLoudness = ActualLoudness;
}
private bool IsSourceActive(HDRAudioSource audio)
{
return(audio.enabled && audio.attachedTo.isPlaying && !audio.attachedTo.mute);
}
//Add a HDR audio source to the collection, don't add the same twice
public void AddAudioSource(HDRAudioSource source)
{
AudioSources.Add(new HDRAudio.AudioTuple(source));
}
//http://en.wikipedia.org/wiki/Decibel Returns the power ratio sum and finds the loudest source
private float UpdateHDRLoudness(out HDRAudio.AudioTuple loudestSource)
{
float loudnessSum = 0.0f;
Vector3 listenerPos = ActiveListener.transform.position;
loudestSource = AudioSources[0];
for (int i = 0; i < AudioSources.Count; ++i)
{
HDRAudioSource current = AudioSources[i].Audio;
var audio = current.attachedTo;
AudioSources[i].ActualLoudness = 0;
if (IsSourceActive(current))
{
float listenerDistance = Vector3.Distance(current.transform.position, listenerPos);
float distanceBasedVolume = 0.0f;
if (listenerDistance > audio.maxDistance)
{
distanceBasedVolume = 0.0f;
}
else if (audio.rolloffMode == AudioRolloffMode.Logarithmic)
{
//volume = min distance / distance
//Clamp volume to max 1
distanceBasedVolume = Mathf.Min(audio.minDistance / listenerDistance, 1);
}
else if (audio.rolloffMode == AudioRolloffMode.Linear)
{
//volume = linear falloff between min and max distance, 1 to 0
distanceBasedVolume = Mathf.Clamp(1 - (listenerDistance - audio.minDistance) / (audio.maxDistance - audio.minDistance), 0, 1);
}
else if (audio.rolloffMode == AudioRolloffMode.Custom)
{
distanceBasedVolume = current.CustomFalloffCurve.Evaluate(listenerDistance / audio.maxDistance);
}
AudioSources[i].ActualLoudness = distanceBasedVolume * current.Decibel;
}
float target = AudioSources[i].ActualLoudness;
float from = AudioSources[i].DynamicLoudness;
//Make sure it the volume doesn't transition too fast
AudioSources[i].DynamicLoudness = LerpClamp(from, target, Time.deltaTime, DBReactionSpeed);
if (AudioSources[i].DynamicLoudness > loudestSource.DynamicLoudness)
{
loudestSource = AudioSources[i];
}
//As x^y, where y < 1 && y >= 0, the result would be one, we don't want inaudible sources to contribute loudness
if (current.ContributeToEnviroment && AudioSources[i].DynamicLoudness > 0.0f)
{
loudnessSum += Mathf.Pow(10, AudioSources[i].DynamicLoudness / 10.0f);
}
}
return(loudnessSum);
}
