public bool SetNextTrack(CustomMusicLoopController nextTrack, bool overwriteTransitioningMusic = false)
{
if (nextMusic == null && nextTrack == curMusic || nextTrack == nextMusic)
{
return(false);
}
if (nextMusic == null || !isInTransition)
{
if (nextMusic)
{
Destroy(nextMusic.gameObject); // not needed anymore
}
PrepareTrack(nextTrack);
return(true);
}
else if (overwriteTransitioningMusic)
{
StopTransition();
Destroy(nextMusic.gameObject); // not needed anymore
if (nextTrack == curMusic)
{
return(false);
}
else
{
PrepareTrack(nextTrack);
return(true);
}
}
return(false);
}
private void PrepareTrack(CustomMusicLoopController nextTrack)
{
nextMusic = nextTrack;
nextMusic.gameObject.name = nextMusic.Source.clip.name;
nextMusic.transform.SetParent(transform);
SetVolume(volume);
}
// timed sequence of events to make the transition smooth
IEnumerator MusicTransition(float delay)
{
yield return(new WaitForSeconds(delay)); // wait for the beat
nextMusic.StartTrack();
float waitTime = SECONDS_PER_BAR * 0.5f; // wait for a full bar
yield return(new WaitForSeconds(waitTime));
float fadeTime = SECONDS_PER_BAR * 0.5f; // fade for a bit longer
// fade out the prologue
float p = 0f;
float startVolume = curMusic.GetVolume();
while (p < 1f)
{ // we only need to fade most of the way out
curMusic.SetVolume(startVolume * (1 - p));
p += Time.deltaTime / fadeTime;
yield return(null);
}
curMusic.StopTrack(); // wait for main menu to start before stopping prologue
curMusic.SetVolume(startVolume); // revert the track to its original volume, just in case
Destroy(curMusic.gameObject); // not needed anymore
curMusic = nextMusic;
nextMusic = null;
isInTransition = false;
transition = null;
}
/// <summary>
/// Starts a transition (instantaneous if withFading = true) to the next track with aligned tempo and bars.
/// </summary>
/// <param name="withFading">Whether the transition involves fading.</param>
/// <param name="track">The track to play. Setting track will force a transition to start.</param>
/// <returns>returns -1 if no transition happened, 0 if it was instant, or the delay before the transition will start.</returns>
public float StartTransition(bool withFading, CustomMusicLoopController track = null)
{
if (track != null)
{
//Attempt to forcibly set the next track
if (!SetNextTrack(track, true) || isInTransition || track != nextMusic)
{
// failed to set a new track, abort
return(-1);
}
}
if (nextMusic == null)
{
return(-1);
}
else if (curMusic == null)
{
curMusic = nextMusic;
nextMusic = null;
curMusic.StartTrack();
return(0);
}
else if (nextMusic == curMusic)
{
nextMusic = null;
return(-1);
}
if (!withFading)
{
if (nextMusic != null)
{
if (isInTransition)
{
StopTransition();
}
curMusic.StopTrack(); //wait for main menu to start before stopping prologue
curMusic.SetVolume(volume);
Destroy(curMusic.gameObject); // not needed anymore
curMusic = nextMusic;
nextMusic = null;
curMusic.StartTrack();
return(0);
}
return(-1);
}
if (isInTransition)
{
return(-1);
}
isInTransition = true;
float curPlayheadTime = curMusic.GetCurrentTime();
int nextBar = Mathf.CeilToInt(curPlayheadTime / SECONDS_PER_BAR);
float nextBarTime = nextBar * SECONDS_PER_BAR;
transition = StartCoroutine(MusicTransition(nextBarTime - curPlayheadTime));
return(nextBarTime - curPlayheadTime);
}
