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Funkin/source/funkin/play/notes/Strumline.hx

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package funkin.play.notes;
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import flixel.FlxG;
import funkin.play.notes.notestyle.NoteStyle;
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import flixel.group.FlxSpriteGroup;
import flixel.group.FlxSpriteGroup.FlxTypedSpriteGroup;
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import flixel.tweens.FlxEase;
import flixel.tweens.FlxTween;
import flixel.util.FlxSort;
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import funkin.play.notes.NoteHoldCover;
import funkin.play.notes.NoteSplash;
import funkin.play.notes.NoteSprite;
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import funkin.play.notes.SustainTrail;
import funkin.data.song.SongData.SongNoteData;
import funkin.ui.options.PreferencesMenu;
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import funkin.util.SortUtil;
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/**
* A group of sprites which handles the receptor, the note splashes, and the notes (with sustains) for a given player.
*/
class Strumline extends FlxSpriteGroup
{
public static final DIRECTIONS:Array<NoteDirection> = [NoteDirection.LEFT, NoteDirection.DOWN, NoteDirection.UP, NoteDirection.RIGHT];
public static final STRUMLINE_SIZE:Int = 104;
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public static final NOTE_SPACING:Int = STRUMLINE_SIZE + 8;
// Positional fixes for new strumline graphics.
static final INITIAL_OFFSET = -0.275 * STRUMLINE_SIZE;
static final NUDGE:Float = 2.0;
static final KEY_COUNT:Int = 4;
static final NOTE_SPLASH_CAP:Int = 6;
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static var RENDER_DISTANCE_MS(get, never):Float;
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static function get_RENDER_DISTANCE_MS():Float
{
return FlxG.height / 0.45;
}
public var isPlayer:Bool;
/**
* The notes currently being rendered on the strumline.
* This group iterates over this every frame to update note positions.
* The PlayState also iterates over this to calculate user inputs.
*/
public var notes:FlxTypedSpriteGroup<NoteSprite>;
public var holdNotes:FlxTypedSpriteGroup<SustainTrail>;
var strumlineNotes:FlxTypedSpriteGroup<StrumlineNote>;
var noteSplashes:FlxTypedSpriteGroup<NoteSplash>;
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var noteHoldCovers:FlxTypedSpriteGroup<NoteHoldCover>;
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var notesVwoosh:FlxTypedSpriteGroup<NoteSprite>;
var holdNotesVwoosh:FlxTypedSpriteGroup<SustainTrail>;
final noteStyle:NoteStyle;
/**
* The note data for the song. Should NOT be altered after the song starts,
* so we can easily rewind.
*/
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var noteData:Array<SongNoteData> = [];
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var nextNoteIndex:Int = -1;
var heldKeys:Array<Bool> = [];
public function new(noteStyle:NoteStyle, isPlayer:Bool)
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{
super();
this.isPlayer = isPlayer;
this.noteStyle = noteStyle;
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this.strumlineNotes = new FlxTypedSpriteGroup<StrumlineNote>();
this.strumlineNotes.zIndex = 10;
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this.add(this.strumlineNotes);
// Hold notes are added first so they render behind regular notes.
this.holdNotes = new FlxTypedSpriteGroup<SustainTrail>();
this.holdNotes.zIndex = 20;
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this.add(this.holdNotes);
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this.holdNotesVwoosh = new FlxTypedSpriteGroup<SustainTrail>();
this.holdNotesVwoosh.zIndex = 21;
this.add(this.holdNotesVwoosh);
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this.notes = new FlxTypedSpriteGroup<NoteSprite>();
this.notes.zIndex = 30;
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this.add(this.notes);
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this.notesVwoosh = new FlxTypedSpriteGroup<NoteSprite>();
this.notesVwoosh.zIndex = 31;
this.add(this.notesVwoosh);
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this.noteHoldCovers = new FlxTypedSpriteGroup<NoteHoldCover>(0, 0, 4);
this.noteHoldCovers.zIndex = 40;
this.add(this.noteHoldCovers);
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this.noteSplashes = new FlxTypedSpriteGroup<NoteSplash>(0, 0, NOTE_SPLASH_CAP);
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this.noteSplashes.zIndex = 50;
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this.add(this.noteSplashes);
this.refresh();
for (i in 0...KEY_COUNT)
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{
var child:StrumlineNote = new StrumlineNote(noteStyle, isPlayer, DIRECTIONS[i]);
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child.x = getXPos(DIRECTIONS[i]);
child.x += INITIAL_OFFSET;
child.y = 0;
noteStyle.applyStrumlineOffsets(child);
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this.strumlineNotes.add(child);
}
for (i in 0...KEY_COUNT)
{
heldKeys.push(false);
}
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// This MUST be true for children to update!
this.active = true;
}
public function refresh():Void
{
sort(SortUtil.byZIndex, FlxSort.ASCENDING);
}
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override function get_width():Float
{
return KEY_COUNT * Strumline.NOTE_SPACING;
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}
public override function update(elapsed:Float):Void
{
super.update(elapsed);
updateNotes();
}
var frameMax:Int;
var animFinishedEver:Bool;
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/**
* Get a list of notes within + or - the given strumtime.
* @param strumTime The current time.
* @param hitWindow The hit window to check.
*/
public function getNotesInRange(strumTime:Float, hitWindow:Float):Array<NoteSprite>
{
var hitWindowStart:Float = strumTime - hitWindow;
var hitWindowEnd:Float = strumTime + hitWindow;
return notes.members.filter(function(note:NoteSprite) {
return note != null && note.alive && !note.hasBeenHit && note.strumTime >= hitWindowStart && note.strumTime <= hitWindowEnd;
});
}
public function getNotesMayHit():Array<NoteSprite>
{
return notes.members.filter(function(note:NoteSprite) {
return note != null && note.alive && !note.hasBeenHit && note.mayHit;
});
}
public function getHoldNotesHitOrMissed():Array<SustainTrail>
{
return holdNotes.members.filter(function(holdNote:SustainTrail) {
return holdNote != null && holdNote.alive && (holdNote.hitNote || holdNote.missedNote);
});
}
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public function getHoldNotesInRange(strumTime:Float, hitWindow:Float):Array<SustainTrail>
{
var hitWindowStart:Float = strumTime - hitWindow;
var hitWindowEnd:Float = strumTime + hitWindow;
return holdNotes.members.filter(function(note:SustainTrail) {
return note != null
&& note.alive
&& note.strumTime >= hitWindowStart
&& (note.strumTime + note.fullSustainLength) <= hitWindowEnd;
});
}
public function getNoteSprite(noteData:SongNoteData):NoteSprite
{
if (noteData == null) return null;
for (note in notes.members)
{
if (note == null) continue;
if (note.alive) continue;
if (note.noteData == noteData) return note;
}
return null;
}
public function getHoldNoteSprite(noteData:SongNoteData):SustainTrail
{
if (noteData == null || ((noteData.length ?? 0.0) <= 0.0)) return null;
for (holdNote in holdNotes.members)
{
if (holdNote == null) continue;
if (holdNote.alive) continue;
if (holdNote.noteData == noteData) return holdNote;
}
return null;
}
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/**
* Call this when resetting the playstate.
*/
public function vwooshNotes():Void
{
for (note in notes.members)
{
if (note == null) continue;
if (!note.alive) continue;
notes.remove(note);
notesVwoosh.add(note);
var targetY:Float = FlxG.height + note.y;
if (Preferences.downscroll) targetY = 0 - note.height;
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FlxTween.tween(note, {y: targetY}, 0.5,
{
ease: FlxEase.expoIn,
onComplete: function(twn) {
note.kill();
notesVwoosh.remove(note, true);
note.destroy();
}
});
}
for (holdNote in holdNotes.members)
{
if (holdNote == null) continue;
if (!holdNote.alive) continue;
holdNotes.remove(holdNote);
holdNotesVwoosh.add(holdNote);
var targetY:Float = FlxG.height + holdNote.y;
if (Preferences.downscroll) targetY = 0 - holdNote.height;
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FlxTween.tween(holdNote, {y: targetY}, 0.5,
{
ease: FlxEase.expoIn,
onComplete: function(twn) {
holdNote.kill();
holdNotesVwoosh.remove(holdNote, true);
holdNote.destroy();
}
});
}
}
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/**
* For a note's strumTime, calculate its Y position relative to the strumline.
* NOTE: Assumes Conductor and PlayState are both initialized.
* @param strumTime
* @return Float
*/
static function calculateNoteYPos(strumTime:Float, vwoosh:Bool = true):Float
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{
// Make the note move faster visually as it moves offscreen.
// var vwoosh:Float = (strumTime < Conductor.songPosition) && vwoosh ? 2.0 : 1.0;
// ^^^ commented this out... do NOT make it move faster as it moves offscreen!
var vwoosh:Float = 1.0;
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var scrollSpeed:Float = PlayState.instance?.currentChart?.scrollSpeed ?? 1.0;
return Constants.PIXELS_PER_MS * (Conductor.instance.songPosition - strumTime) * scrollSpeed * vwoosh * (Preferences.downscroll ? 1 : -1);
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}
function updateNotes():Void
{
if (noteData.length == 0) return;
var songStart:Float = PlayState.instance?.startTimestamp ?? 0.0;
var hitWindowStart:Float = Conductor.instance.songPosition - Constants.HIT_WINDOW_MS;
var renderWindowStart:Float = Conductor.instance.songPosition + RENDER_DISTANCE_MS;
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for (noteIndex in nextNoteIndex...noteData.length)
{
var note:Null<SongNoteData> = noteData[noteIndex];
if (note == null) continue; // Note is blank
if (note.time < songStart || note.time < hitWindowStart)
{
// Note is in the past, skip it.
nextNoteIndex = noteIndex + 1;
continue;
}
if (note.time > renderWindowStart) break; // Note is too far ahead to render
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var noteSprite = buildNoteSprite(note);
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if (note.length > 0)
{
noteSprite.holdNoteSprite = buildHoldNoteSprite(note);
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}
nextNoteIndex = noteIndex + 1; // Increment the nextNoteIndex rather than splicing the array, because splicing is slow.
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}
// Update rendering of notes.
for (note in notes.members)
{
if (note == null || !note.alive) continue;
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var vwoosh:Bool = note.holdNoteSprite == null;
// Set the note's position.
note.y = this.y - INITIAL_OFFSET + calculateNoteYPos(note.strumTime, vwoosh);
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// If the note is miss
var isOffscreen = Preferences.downscroll ? note.y > FlxG.height : note.y < -note.height;
if (note.handledMiss && isOffscreen)
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{
killNote(note);
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}
}
// Update rendering of hold notes.
for (holdNote in holdNotes.members)
{
if (holdNote == null || !holdNote.alive) continue;
if (Conductor.instance.songPosition > holdNote.strumTime && holdNote.hitNote && !holdNote.missedNote)
{
if (isPlayer && !isKeyHeld(holdNote.noteDirection))
{
// Stopped pressing the hold note.
playStatic(holdNote.noteDirection);
holdNote.missedNote = true;
holdNote.visible = true;
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holdNote.alpha = 0.0; // Completely hide the dropped hold note.
}
}
var renderWindowEnd = holdNote.strumTime + holdNote.fullSustainLength + Constants.HIT_WINDOW_MS + RENDER_DISTANCE_MS / 8;
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if (holdNote.missedNote && Conductor.instance.songPosition >= renderWindowEnd)
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{
// Hold note is offscreen, kill it.
holdNote.visible = false;
holdNote.kill(); // Do not destroy! Recycling is faster.
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// The cover will see this and clean itself up.
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}
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else if (holdNote.hitNote && holdNote.sustainLength <= 0)
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{
// Hold note is completed, kill it.
if (isKeyHeld(holdNote.noteDirection))
{
playPress(holdNote.noteDirection);
}
else
{
playStatic(holdNote.noteDirection);
}
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if (holdNote.cover != null)
{
holdNote.cover.playEnd();
}
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holdNote.visible = false;
holdNote.kill();
}
else if (holdNote.missedNote && (holdNote.fullSustainLength > holdNote.sustainLength))
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{
// Hold note was dropped before completing, keep it in its clipped state.
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holdNote.visible = true;
var yOffset:Float = (holdNote.fullSustainLength - holdNote.sustainLength) * Constants.PIXELS_PER_MS;
var vwoosh:Bool = false;
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if (Preferences.downscroll)
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{
holdNote.y = this.y + calculateNoteYPos(holdNote.strumTime, vwoosh) - holdNote.height + STRUMLINE_SIZE / 2;
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}
else
{
holdNote.y = this.y - INITIAL_OFFSET + calculateNoteYPos(holdNote.strumTime, vwoosh) + yOffset + STRUMLINE_SIZE / 2;
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}
}
else if (Conductor.instance.songPosition > holdNote.strumTime && holdNote.hitNote)
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{
// Hold note is currently being hit, clip it off.
holdConfirm(holdNote.noteDirection);
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holdNote.visible = true;
holdNote.sustainLength = (holdNote.strumTime + holdNote.fullSustainLength) - Conductor.instance.songPosition;
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if (holdNote.sustainLength <= 10)
{
holdNote.visible = false;
}
if (Preferences.downscroll)
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{
holdNote.y = this.y - holdNote.height + STRUMLINE_SIZE / 2;
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}
else
{
holdNote.y = this.y - INITIAL_OFFSET + STRUMLINE_SIZE / 2;
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}
}
else
{
// Hold note is new, render it normally.
holdNote.visible = true;
var vwoosh:Bool = false;
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if (Preferences.downscroll)
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{
holdNote.y = this.y + calculateNoteYPos(holdNote.strumTime, vwoosh) - holdNote.height + STRUMLINE_SIZE / 2;
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}
else
{
holdNote.y = this.y - INITIAL_OFFSET + calculateNoteYPos(holdNote.strumTime, vwoosh) + STRUMLINE_SIZE / 2;
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}
}
}
// Update rendering of pressed keys.
for (dir in DIRECTIONS)
{
if (isKeyHeld(dir) && getByDirection(dir).getCurrentAnimation() == "static")
{
playPress(dir);
}
}
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}
/**
* Called when the PlayState skips a large amount of time forward or backward.
*/
public function handleSkippedNotes():Void
{
// By calling clean(), we remove all existing notes so they can be re-added.
clean();
// By setting noteIndex to 0, the next update will skip past all the notes that are in the past.
nextNoteIndex = 0;
}
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public function onBeatHit():Void
{
if (notes.members.length > 1) notes.members.insertionSort(compareNoteSprites.bind(FlxSort.ASCENDING));
if (holdNotes.members.length > 1) holdNotes.members.insertionSort(compareHoldNoteSprites.bind(FlxSort.ASCENDING));
}
public function pressKey(dir:NoteDirection):Void
{
heldKeys[dir] = true;
}
public function releaseKey(dir:NoteDirection):Void
{
heldKeys[dir] = false;
}
public function isKeyHeld(dir:NoteDirection):Bool
{
return heldKeys[dir];
}
/**
* Called when the song is reset.
* Removes any special animations and the like.
* Doesn't reset the notes from the chart, that's handled by the PlayState.
*/
public function clean():Void
{
for (note in notes.members)
{
if (note == null) continue;
killNote(note);
}
for (holdNote in holdNotes.members)
{
if (holdNote == null) continue;
holdNote.kill();
}
for (splash in noteSplashes)
{
if (splash == null) continue;
splash.kill();
}
for (cover in noteHoldCovers)
{
if (cover == null) continue;
cover.kill();
}
heldKeys = [false, false, false, false];
for (dir in DIRECTIONS)
{
playStatic(dir);
}
}
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public function applyNoteData(data:Array<SongNoteData>):Void
{
this.notes.clear();
this.noteData = data.copy();
this.nextNoteIndex = 0;
// Sort the notes by strumtime.
this.noteData.insertionSort(compareNoteData.bind(FlxSort.ASCENDING));
}
/**
* @param note The note to hit.
* @param removeNote True to remove the note immediately, false to make it transparent and let it move offscreen.
*/
public function hitNote(note:NoteSprite, removeNote:Bool = true):Void
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{
playConfirm(note.direction);
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note.hasBeenHit = true;
if (removeNote)
{
killNote(note);
}
else
{
note.alpha = 0.5;
note.desaturate();
}
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if (note.holdNoteSprite != null)
{
note.holdNoteSprite.hitNote = true;
note.holdNoteSprite.missedNote = false;
note.holdNoteSprite.alpha = 1.0;
}
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}
public function killNote(note:NoteSprite):Void
{
if (note == null) return;
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note.visible = false;
notes.remove(note, false);
note.kill();
if (note.holdNoteSprite != null)
{
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note.holdNoteSprite.missedNote = true;
note.holdNoteSprite.visible = false;
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}
}
public function getByIndex(index:Int):StrumlineNote
{
return this.strumlineNotes.members[index];
}
public function getByDirection(direction:NoteDirection):StrumlineNote
{
return getByIndex(DIRECTIONS.indexOf(direction));
}
public function playStatic(direction:NoteDirection):Void
{
getByDirection(direction).playStatic();
}
public function playPress(direction:NoteDirection):Void
{
getByDirection(direction).playPress();
}
public function playConfirm(direction:NoteDirection):Void
{
getByDirection(direction).playConfirm();
}
public function holdConfirm(direction:NoteDirection):Void
{
getByDirection(direction).holdConfirm();
}
public function isConfirm(direction:NoteDirection):Bool
{
return getByDirection(direction).isConfirm();
}
public function playNoteSplash(direction:NoteDirection):Void
{
// TODO: Add a setting to disable note splashes.
// if (Settings.noSplash) return;
if (!noteStyle.isNoteSplashEnabled()) return;
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var splash:NoteSplash = this.constructNoteSplash();
if (splash != null)
{
splash.play(direction);
splash.x = this.x;
splash.x += getXPos(direction);
splash.x += INITIAL_OFFSET;
splash.y = this.y;
splash.y -= INITIAL_OFFSET;
splash.y += 0;
}
}
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public function playNoteHoldCover(holdNote:SustainTrail):Void
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{
// TODO: Add a setting to disable note splashes.
// if (Settings.noSplash) return;
if (!noteStyle.isHoldNoteCoverEnabled()) return;
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var cover:NoteHoldCover = this.constructNoteHoldCover();
if (cover != null)
{
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cover.holdNote = holdNote;
holdNote.cover = cover;
cover.visible = true;
cover.playStart();
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cover.x = this.x;
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cover.x += getXPos(holdNote.noteDirection);
cover.x += STRUMLINE_SIZE / 2;
cover.x -= cover.width / 2;
cover.x += -12; // Manual tweaking because fuck.
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cover.y = this.y;
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cover.y += INITIAL_OFFSET;
cover.y += STRUMLINE_SIZE / 2;
cover.y += -96; // Manual tweaking because fuck.
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}
}
public function buildNoteSprite(note:SongNoteData):NoteSprite
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{
var noteSprite:NoteSprite = constructNoteSprite();
if (noteSprite != null)
{
noteSprite.strumTime = note.time;
noteSprite.direction = note.getDirection();
noteSprite.noteData = note;
noteSprite.x = this.x;
noteSprite.x += getXPos(DIRECTIONS[note.getDirection() % KEY_COUNT]);
noteSprite.x -= NUDGE;
// noteSprite.x += INITIAL_OFFSET;
noteSprite.y = -9999;
}
return noteSprite;
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}
public function buildHoldNoteSprite(note:SongNoteData):SustainTrail
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{
var holdNoteSprite:SustainTrail = constructHoldNoteSprite();
if (holdNoteSprite != null)
{
holdNoteSprite.noteData = note;
holdNoteSprite.strumTime = note.time;
holdNoteSprite.noteDirection = note.getDirection();
holdNoteSprite.fullSustainLength = note.length;
holdNoteSprite.sustainLength = note.length;
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holdNoteSprite.missedNote = false;
holdNoteSprite.hitNote = false;
holdNoteSprite.visible = true;
holdNoteSprite.alpha = 1.0;
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holdNoteSprite.x = this.x;
holdNoteSprite.x += getXPos(DIRECTIONS[note.getDirection() % KEY_COUNT]);
holdNoteSprite.x += STRUMLINE_SIZE / 2;
holdNoteSprite.x -= holdNoteSprite.width / 2;
holdNoteSprite.y = -9999;
}
return holdNoteSprite;
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}
/**
* Custom recycling behavior.
*/
function constructNoteSplash():NoteSplash
{
var result:NoteSplash = null;
// If we haven't filled the pool yet...
if (noteSplashes.length < noteSplashes.maxSize)
{
// Create a new note splash.
result = new NoteSplash();
this.noteSplashes.add(result);
}
else
{
// Else, find a note splash which is inactive so we can revive it.
result = this.noteSplashes.getFirstAvailable();
if (result != null)
{
result.revive();
}
else
{
// The note splash pool is full and all note splashes are active,
// so we just pick one at random to destroy and restart.
result = FlxG.random.getObject(this.noteSplashes.members);
}
}
return result;
}
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/**
* Custom recycling behavior.
*/
function constructNoteHoldCover():NoteHoldCover
{
var result:NoteHoldCover = null;
// If we haven't filled the pool yet...
if (noteHoldCovers.length < noteHoldCovers.maxSize)
{
// Create a new note hold cover.
result = new NoteHoldCover();
this.noteHoldCovers.add(result);
}
else
{
// Else, find a note splash which is inactive so we can revive it.
result = this.noteHoldCovers.getFirstAvailable();
if (result != null)
{
result.revive();
}
else
{
// The note hold cover pool is full and all note hold covers are active,
// so we just pick one at random to destroy and restart.
result = FlxG.random.getObject(this.noteHoldCovers.members);
}
}
return result;
}
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/**
* Custom recycling behavior.
*/
function constructNoteSprite():NoteSprite
{
var result:NoteSprite = null;
// Else, find a note which is inactive so we can revive it.
result = this.notes.getFirstAvailable();
if (result != null)
{
// Revive and reuse the note.
result.revive();
}
else
{
// The note sprite pool is full and all note splashes are active.
// We have to create a new note.
result = new NoteSprite(noteStyle);
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this.notes.add(result);
}
return result;
}
/**
* Custom recycling behavior.
*/
function constructHoldNoteSprite():SustainTrail
{
var result:SustainTrail = null;
// Else, find a note which is inactive so we can revive it.
result = this.holdNotes.getFirstAvailable();
if (result != null)
{
// Revive and reuse the note.
result.revive();
}
else
{
// The note sprite pool is full and all note splashes are active.
// We have to create a new note.
result = new SustainTrail(0, 100, noteStyle);
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this.holdNotes.add(result);
}
return result;
}
function getXPos(direction:NoteDirection):Float
{
return switch (direction)
{
case NoteDirection.LEFT: 0;
case NoteDirection.DOWN: 0 + (1 * Strumline.NOTE_SPACING);
case NoteDirection.UP: 0 + (2 * Strumline.NOTE_SPACING);
case NoteDirection.RIGHT: 0 + (3 * Strumline.NOTE_SPACING);
default: 0;
}
}
/**
* Apply a small animation which moves the arrow down and fades it in.
* Only plays at the start of Free Play songs.
*
* Note that modifying the offset of the whole strumline won't have the
* @param arrow The arrow to animate.
* @param index The index of the arrow in the strumline.
*/
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function fadeInArrow(index:Int, arrow:StrumlineNote):Void
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{
arrow.y -= 10;
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arrow.alpha = 0.0;
FlxTween.tween(arrow, {y: arrow.y + 10, alpha: 1}, 1, {ease: FlxEase.circOut, startDelay: 0.5 + (0.2 * index)});
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}
public function fadeInArrows():Void
{
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for (index => arrow in this.strumlineNotes.members.keyValueIterator())
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{
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fadeInArrow(index, arrow);
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}
}
function compareNoteData(order:Int, a:SongNoteData, b:SongNoteData):Int
{
return FlxSort.byValues(order, a.time, b.time);
}
function compareNoteSprites(order:Int, a:NoteSprite, b:NoteSprite):Int
{
return FlxSort.byValues(order, a?.strumTime, b?.strumTime);
}
function compareHoldNoteSprites(order:Int, a:SustainTrail, b:SustainTrail):Int
{
return FlxSort.byValues(order, a?.strumTime, b?.strumTime);
}
}