public static void Set3dPriority(AudioSource audio)
{
float distanceToListener = Vector3.Distance(audio.transform.position, MasterAudio.AudioListenerTransform.position);
float perceivedVolume;
if (audio.rolloffMode == AudioRolloffMode.Logarithmic)
{
perceivedVolume = audio.volume / Mathf.Max(audio.minDistance, distanceToListener - audio.minDistance); // Unity seems to just use a 1/distance model for this
}
else if (audio.rolloffMode == AudioRolloffMode.Linear)
{
perceivedVolume = Mathf.Lerp(audio.volume, 0, Mathf.Max(0, distanceToListener - audio.minDistance) / (audio.maxDistance - audio.minDistance)); // Linearly interpolate from max volume to zero as we go from the minimum distance to the max
}
else
{
perceivedVolume = Mathf.Lerp(audio.volume, 0, Mathf.Max(0, distanceToListener - audio.minDistance) / (audio.maxDistance - audio.minDistance)); // Not possible to deal with custom rolloffs since it's not accessible by script. Let's pretend it's linear.
}
if (!audio.loop)
{ //Don't make looping sounds lessen in priority over time
perceivedVolume = Mathf.Lerp(perceivedVolume, perceivedVolume * 0.1f, AudioUtil.GetAudioPlayedPercentage(audio) * .01f); //Set the factor lower when this non-looping sound has played for a few seconds so that newer sounds get a slightly higher priority.
}
audio.priority = (int)Mathf.Lerp(HIGHEST_PRIORITY, LOWEST_PRIORITY, Mathf.InverseLerp(1f, 0f, perceivedVolume)); // Transform our perceived volume from the [0...1] range to the [16...128] range so that the higher the perceived volume the lower the priority number.
}