/// <summary> Generic method for fading an AudioSource along a Linear-curve (Lerp). </summary>
public void FadeAudioSourceLinear(AudioSource audioSource, float from, float to, float fadeTime, System.Action completedCallback = null)
{
if (!gameObject.activeSelf)
{
Debug.LogError($"This gameObject '{gameObject.name}' has been deactivated before calling the FadeCoroutine, which will not work on a disabled object. \n" +
$"Try moving this '{nameof(AudioSourceUtility)}'-component to a different object, and set its audiosource to the object you tried to disable.", gameObject);
return;
}
if (cancellationToken == null)
{
cancellationToken = new CoroutineCancellationToken();
}
else if (!cancellationToken.IsFinished)
{
cancellationToken.Cancel();
cancellationToken = new CoroutineCancellationToken();
}
StartCoroutine(GenericFadeToVolumeCoroutine(audioSource, Mathf.Lerp, from, to, fadeTime, cancellationToken, completedCallback));
}
/// <summary> Generic Coroutine which does all of the actual fading of the AudioSource along an interpolationMethod-curve (SmoothStep, Lerp, etc). </summary>
private static IEnumerator GenericFadeToVolumeCoroutine(AudioSource audioSource, System.Func <float, float, float, float> interpolationMethod, float from, float to, float fadeTime, CoroutineCancellationToken token = null, System.Action completedCallback = null)
{
token?.CoroutineStart();
var elapsedTime = 0f;
while (elapsedTime < fadeTime && (token == null || !token.IsCanceled))
{
audioSource.volume = 1f * interpolationMethod(from, to, elapsedTime / fadeTime);
elapsedTime += Time.deltaTime;
yield return(null);
}
if (token == null || !token.IsCanceled)
{
audioSource.volume = 1f * to;
}
token?.CoroutineFinish();
completedCallback?.Invoke();
}