//Create two audio sources to play audio.
void Awake()
{
this.currentState = LoopedBGMState.Stopped;
this.currentSource = this.gameObject.AddComponent <AudioSource>();
this.nextSource = this.gameObject.AddComponent <AudioSource>();
this.SetSong(this.songToPlay, this.loopSeconds);
}
public override void Play()
{
this.currentState = LoopedBGMState.Playing;
this.currentSourceVolume = 1;
this.nextSourceVolume = 0;
this.currentSource.Play();
}
//Check if the current source needs to be faded out. If so, start
//playing next source, and transition!
private void PlayingUpdate()
{
if (this.currentSource.time >= this.loopSeconds)
{
this.nextSource.Play();
this.currentState = LoopedBGMState.Transitioning;
}
}
//Every frame, make currentSource quieter, and nextSource louder. Once
//currentSource is muted and nextSource is at full volume, stop currentSource
//and swap them.
private void TransitioningUpdate()
{
float dVolume = this.fadePerSecond * Time.deltaTime;
this.currentSourceVolume = Mathf.Clamp(this.currentSourceVolume - dVolume, 0, 1);
this.nextSourceVolume = Mathf.Clamp(this.nextSourceVolume + dVolume, 0, 1);
if (this.currentSourceVolume == 0 && this.nextSourceVolume == 1)
{
this.currentSource.Stop();
//Swap them - t is just a temporary place to put one of them while swapping.
AudioSource t = this.currentSource;
this.currentSource = this.nextSource;
this.nextSource = t;
//Don't forget to switch the volume values, too!
float v = this.currentSourceVolume;
this.currentSourceVolume = this.nextSourceVolume;
this.nextSourceVolume = v;
this.currentState = LoopedBGMState.Playing;
}
}
public override void Stop()
{
this.currentState = LoopedBGMState.Stopped;
this.currentSource.Stop();
this.nextSource.Stop();
}
