identity2

# This function should be called whenever the character moves.
func update_camera(character_pos):
    var new_camera_pos = self.get_global_pos()

    # Check if the character reaches the right margin.
    if character_pos.x > self.get_global_pos().x + screen_size.width * (drag_margin_right - 0.5):
        new_camera_pos.x = character_pos.x - screen_size.width * (drag_margin_right - 0.5)
    
    # Check if the character reaches the left margin.
    elif character_pos.x < self.get_global_pos().x + screen_size.width * (drag_margin_left - 0.5):

identity2

# Being called when loaded.
func _ready():
    screen_size = self.get_viewport_rect().size

# Actually scroll the screen. (Update the viewport according to the position of the camera.)
func update_viewport():
    var canvas_transform = self.get_viewport().get_canvas_transform()
    canvas_transform.o = -self.get_global_pos() + screen_size / 2.0
    self.get_viewport().set_canvas_transform(canvas_transform)

identity2

# Scroll the screen (aka. move the camera) when the character reaches the margins.
var drag_margin_left = 0.3
var drag_margin_right = 0.7

# The left/right most edge of the scene. (The camera couldn't move past these limits.)
var right_limit = 1000000
var left_limit = -1000000

# The size of the screen
var screen_size

identity2

//the update function of music notes
void Update()
{
    transform.position = Vector2.Lerp(
        SpawnPos,
        RemovePos,
        (BeatsShownInAdvance - (beatOfThisNote - songPosInBeats)) / BeatsShownInAdvance
    );    
}

identity2

if (nextIndex < notes.Length && notes[nextIndex] < songPosInBeats + beatsShownInAdvance)
{
    Instantiate( /* Music Note Prefab */ );

    //initialize the fields of the music note

    nextIndex++;
}

identity2

void Update()
{
    //calculate the position in seconds
    songPosition = (float) (AudioSettings.dspTime - dsptimesong);

    //calculate the position in beats
    songPosInBeats = songPosition / secPerBeat;
}

identity2

void Start()
{
    //calculate how many seconds is one beat
    //we will see the declaration of bpm later
    secPerBeat = 60f / bpm;
    
    //record the time when the song starts
    dsptimesong = (float) AudioSettings.dspTime;

    //start the song

identity2

//the current position of the song (in seconds)
float songPosition;

//the current position of the song (in beats)
float songPosInBeats;

//the duration of a beat
float secPerBeat;

//how much time (in seconds) has passed since the song started

identity2

public static void SaveAudioClipToDisk(AudioClip audioClip, string filename)
{
    //create file
    BinaryFormatter bf = new BinaryFormatter ();
    FileStream file = File.Create (Application.persistentDataPath+ "/" + filename);

    //serialize by setting the sample, frequency, samples, and channels to the new AudioClipSample instance
    AudioClipSample newSample = new AudioClipSample();
    newSample.sample = new float[audioClip.samples * audioClip.channels];
    newSample.frequency = audioClip.frequency;

identity2

public static void LoadAudioClipFromDisk(AudioSource audioSource, string filename)
{
    if (File.Exists (Application.persistentDataPath + "/"+ filename)) {
        //deserialize local binary file to AudioClipSample
        BinaryFormatter bf = new BinaryFormatter ();
        FileStream file = File.Open (Application.persistentDataPath + "/" + filename, FileMode.Open);
        AudioClipSample clipSample = (AudioClipSample) bf.Deserialize (file);
        file.Close ();

        //create new AudioClip instance, and set the (name, samples, channels, frequency, [stream] play immediately without fully loaded)