Α͘Θ͔Μͳ͍͚Ͳ ࠷ۙͭͬͯ͘ΔήʔϜͰ RxJava ͔ͭͬͯΈͯΔ RxJavaษڧձ 2015.3.17 @slightair

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஍໘͕ྲྀΕͯ͘Δ ϑϦοΫͰࠨӈʹಈ͘ λοϓ͢ΔͱͭͿΕΔ ͸ͳ͢ͱδϟϯϓ͢Δ Ωϟϥʹ߹Θͤͯ Χϝϥ͕ಈ͘

LibGDX + RxJava

1. Input

ೖྗΠϕϯτ • touchDown -> δϟϯϓ४උ • tap -> δϟϯϓ • fling -> ࠨӈҠಈ • panStop -> δϟϯϓΩϟϯηϧ

GameMaster Input Character ը໘͕ λοϓ͞ΕͨΜ͕ͩ ͪΐͬͱ δϟϯϓͯ͠ΈΖ

GameMaster Input Character ը໘͕ λοϓ͞ΕͨΜ͕ͩ ͪΐͬͱ δϟϯϓͯ͠ΈΖ

GameMaster Input Character ήʔϜʹؔ܎ͦ͠͏ͳ Πϕϯτ؂ࢹ͠·͢ ͍ͭδϟϯϓ͢Ε͹͍͍͔ ؂ࢹ͠·͢ ͍ͬͯ͏͔Πϕϯτ શ෦؂ࢹͤͯ͞ observable͘Ε observable͘Ε

// Input PublishSubject subject = PublishSubject.create(); ! @Override public boolean touchDown(float x, float y, int pointer, int button) { subject.onNext(GameMaster.Action.CHARACTER_PREPARE_JUM return false; } ! @Override public boolean tap(float x, float y, int count, int button) { subject.onNext(GameMaster.Action.CHARACTER_JUMP); return false; } ! … ! public Observable getActions() {return subject;}

// GameMaster public enum Action { CHARACTER_MOVE_LEFT, CHARACTER_MOVE_RIG ! public GameMaster(Observable input) { this.input = input; this.character = new Character(input); … ! // Character public enum Action { MOVE_LEFT, MOVE_RIGHT, JUMP, … } public Character(Observable input) { this.input = input; } ! public Observable getActions() { return input.map(new ActionConverter()); } !

// Character private class ActionConverter implements Func1 { ! @Override public Action call(GameMaster.Action action) { Action result = null; switch (action) { case CHARACTER_MOVE_LEFT: result = Action.MOVE_LEFT; break; case CHARACTER_MOVE_RIGHT: result = Action.MOVE_RIGHT; break; case CHARACTER_PREPARE_JUMP: result = Action.PREPARE_JUMP; break; … } return result; }

2. Character ModelInstance

Model Instance • LibGDX (3D) Ͱඳը͢ΔϞσϧΛ දݱ͢ΔΫϥε • xyz࠲ඪ ճస εέʔϧ ͳͲΛࢦఆ͢Δ • ύϥϝʔλΛม͑ΔΞχϝʔγϣϯΛ࣮ߦ͢Δ

ҠಈͱΞχϝʔγϣϯ • δϟϯϓ४උ -> ্͔Βԡ͞ΕͨΑ͏ʹͭͿΕΔ • δϟϯϓ -> ͭͿΕΛ໭্ͭͭ͠ԼҠಈ • ࠨӈҠಈ -> ࠨӈʹඳըҐஔΛҠಈ • δϟϯϓΩϟϯηϧ -> ͭͿΕΛ໭͢

Character CharacterModelInstance getActions() Observable ΩϟϥΫλʔʹى͖ͨ ΞΫγϣϯΛ؂ࢹ

// CharacterModelInstance public CharacterModelInstance(Model model, Character character) { super(model); … character.getActions().subscribe(new Action1() { @Override public void call(Character.Action action) { switch (action) { case MOVE_LEFT: transform.translate(GroundBlockModel.SIZE, 0.0f, 0.0f); break; case MOVE_RIGHT: transform.translate(-GroundBlockModel.SIZE, 0.0f, 0.0f); break; case PREPARE_JUMP: animationController.animate("shrink", 0.0f); break; …

3. Camera

ΧϝϥͷҠಈ • ΩϟϥΫλʔʹ߹Θͤͯಈ͘ • ඍົʹΞχϝʔγϣϯೖͬͯΔ • Exponential Ease Out • TweenEngine Ͱ࣮૷

Character CameraMan getActions() Observable ΩϟϥΫλʔʹى͖ͨ ΞΫγϣϯΛ؂ࢹ

// CameraMan public CameraMan(final OrthographicCamera camera, Character character) { this.camera = camera; this.character = character; character.getActions().subscribe(new Action1() { @Override public void call(Character.Action action) { switch (action) { case MOVE_LEFT: Tween.to(camera, CameraTween.POSITION_X, cameraMoveDuration) .targetRelative(-GroundBlockModel.SIZE) .ease(TweenEquations.easeOutExpo) .start(tweenManager); break; …

4. Ground Blocks

஍໘ϒϩοΫ • ԞʹϒϩοΫΛൃੜͤ͞Δ • खલʹྲྀΕͯ͘Δ • खલͷϥΠϯ͕ফ͑ͯ͘ • ͜Εͷ܁Γฦ͠ • ήʔϜϧʔϓͰGameMasterͷupdate() Λఆظతʹୟ͍ͯϒϩοΫੜ੒

0.12 0.32 0.10 0.21 update update update update

0.12 0.32 0.14 0.21 update update update update 0.12 0.44 0.58 0.79 Observable timeline = updates.scan((t1, t2) -> return t1 + t2);

// GameMaster private PublishSubject actions = PublishSubject.create(); public GameMaster(Observable input) { this.input = input; this.character = new Character(input); this.groundGenerator = new GroundGenerator(); this.groundLineEmitter = new GroundLineEmitter(timeline, GROUND_LINE_SPAWN_INTERVAL); actions .mergeWith(input) .mergeWith(groundLineEmitter.getEmits()) .subscribe(new ActionProcessor());

0.12 0.44 0.58 0.79 timeline emits.onNext(Action.GROUND_SPAWN_NEW_LINE); GroundLineEmitter ActionProcessor GroundGenerator#next()

Ground Generator Ground Ground Layouter Ground Line #MPDL #MPDL #MPDL #MPDL *OTUBODF #MPDL *OTUBODF #MPDL *OTUBODF getNewLines() putLine(line) Layout next()

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