void PlayerInputted()
{
// Start the song if it isn't started yet.
if (!songStarted)
{
songStarted = true;
StartSong();
statusText.text = "";
return;
}
// Play the beat sound.
beatAudioSource.Play();
if (notesOnScreen.Count > 0)
{
// Get the front note.
MusicNote frontNote = notesOnScreen.Peek();
// Distance from the note to the finish line.
float offset = Mathf.Abs(frontNote.gameObject.transform.position.x - finishLineX);
// Music note hit.
if (offset <= tolerationOffset)
{
// Change color to green to indicate a "HIT".
frontNote.ChangeColor(true);
statusText.text = "HIT!";
// Remove the reference. (Now the next note moves to the front of the queue.)
notesOnScreen.Dequeue();
}
}
}
void Update()
{
// Check key press.
if (Input.GetKeyDown(KeyCode.Space))
{
PlayerInputted();
}
if (!songStarted)
{
return;
}
// Calculate songposition. (Time passed - time passed last frame).
songposition = (float)(AudioSettings.dspTime - dsptimesong - songOffset);
// Check if we need to instantiate a new note. (We obtain the current beat of the song by (songposition / secondsPerBeat).)
// See the image for note spawning (note that the direction is reversed):
// http://shinerightstudio.com/posts/music-syncing-in-rhythm-games/pic2.png
float beatToShow = songposition / secondsPerBeat + BeatsShownOnScreen;
// Check if there are still notes in the track, and check if the next note is within the bounds we intend to show on screen.
if (indexOfNextNote < track.Length && track[indexOfNextNote] < beatToShow)
{
// Instantiate a new music note. (Search "Object Pooling" for more information if you wish to minimize the delay when instantiating game objects.)
// We don't care about the position and rotation because we will set them later in MusicNote.Initialize(...).
MusicNote musicNote = ((GameObject)Instantiate(musicNotePrefab, Vector2.zero, Quaternion.identity)).GetComponent <MusicNote>();
musicNote.Initialize(this, startLineX, finishLineX, removeLineX, posY, track[indexOfNextNote]);
// The note is push into the queue for reference.
notesOnScreen.Enqueue(musicNote);
// Update the next index.
indexOfNextNote++;
}
// Loop the queue to check if any of them reaches the finish line.
if (notesOnScreen.Count > 0)
{
MusicNote currNote = notesOnScreen.Peek();
if (currNote.transform.position.x >= finishLineX + tolerationOffset)
{
// Change color to red to indicate a miss.
currNote.ChangeColor(false);
notesOnScreen.Dequeue();
statusText.text = "MISS!";
}
}
// Note that the music note is eventually removed by itself (the Update() function in MusicNote) when it reaches the removeLine.
}