[add] Added PlayScene.

src/sj/Game.d

@@ -12,6 +12,7 @@ import sj.AbstractGame,
        sj.LoadingScene,
        sj.LobbyWorld,
        sj.Music,
+       sj.PlayScene,
        sj.ProgramSet,
        sj.SelectScene,
        sj.TitleScene;
@@ -37,10 +38,12 @@ class Game : AbstractGame {
     title_  = new TitleScene(lobby_, programs_);
     select_ = new SelectScene(lobby_, programs_, fonts_, music_list_);
     load_   = new LoadingScene(args, lobby_, programs_, fonts_);
+    play_   = new PlayScene();
 
     title_ .SetupSceneDependency(select_);
     select_.SetupSceneDependency(title_, load_);
-    load_  .SetupSceneDependency();  // TODO: pass play scene
+    load_  .SetupSceneDependency(play_);
+    play_  .SetupSceneDependency();  // TODO: pass result scene
 
     title_.Initialize();
     super(title_);
@@ -50,6 +53,7 @@ class Game : AbstractGame {
     title_.destroy();
     select_.destroy();
     load_.destroy();
+    play_.destroy();
 
     lobby_.destroy();
 
@@ -70,4 +74,5 @@ class Game : AbstractGame {
   TitleScene   title_;
   SelectScene  select_;
   LoadingScene load_;
+  PlayScene    play_;
 }

src/sj/LoadingScene.d

@@ -8,6 +8,7 @@ import sj.Args,
        sj.KeyInput,
        sj.LobbyWorld,
        sj.Music,
+       sj.PlayScene,
        sj.ProgramSet,
        sj.SceneInterface;
 
@@ -29,7 +30,8 @@ class LoadingScene : SceneInterface {
   }
 
   ///
-  void SetupSceneDependency() {  // TODO: add play scene
+  void SetupSceneDependency(PlayScene play) {  // TODO: add play scene
+    play_scene_ = play;
   }
 
   ///
@@ -41,9 +43,10 @@ class LoadingScene : SceneInterface {
   override SceneInterface Update(KeyInput input) {
     if (first_drawn_) {
       // TODO: parallelize contex creation
-      // auto context = music_.CreatePlayerContext(
-      //     vec2i(args_.window_size, args_.window_size), programs_.player);
-      // TODO: pass the context to play scene
+      auto context = music_.CreatePlayerContext(
+          vec2i(args_.window_size, args_.window_size), programs_.player);
+      play_scene_.Initialize(music_, context);
+      return play_scene_;
     }
     return this;
   }
@@ -55,12 +58,14 @@ class LoadingScene : SceneInterface {
  private:
   const Args args_;
 
-  LobbyWorld lobby_;
+  PlayScene play_scene_;
 
   ProgramSet programs_;
 
   FontSet fonts_;
 
+  LobbyWorld lobby_;
+
   Music music_;
 
   bool first_drawn_;

src/sj/Music.d

@@ -95,6 +95,11 @@ class Music {
   @property ref const(PreviewConfig) preview() const {
     return preview_;
   }
+  ///
+  @property float beat() const {
+    const msecs = sfMusic_getPlayingOffset(music_).microseconds * 1e-6f;
+    return msecs / 60f * bpm_;
+  }
 
  private:
   static float GetNumericAsFloatFromJson(in JSONValue json) {

src/sj/PlayScene.d

@@ -0,0 +1,57 @@
+/// License: MIT
+module sj.PlayScene;
+
+import gl4d;
+
+static import sjplayer;
+
+import sj.KeyInput,
+       sj.Music,
+       sj.SceneInterface;
+
+///
+class PlayScene : SceneInterface {
+ public:
+  ///
+  this() {
+  }
+  ~this() {
+    context_.destroy();
+  }
+
+  ///
+  void SetupSceneDependency() {  // TODO: add result scene
+  }
+
+  ///
+  void Initialize(Music music, sjplayer.Context context) {
+    music_   = music;
+    context_ = context;
+
+    music_.PlayForGame();
+  }
+  override SceneInterface Update(KeyInput input) {
+    context_.OperateScheduledControllers(music_.beat);
+
+    // TODO: actor accelaration
+
+    context_.actor.Update();
+    context_.posteffect.Update();
+
+    // TODO: damage calculation
+    return this;
+  }
+  override void Draw() {
+    context_.StartDrawing();
+
+    context_.DrawBackground();
+    context_.DrawElements();
+    context_.DrawActor();
+
+    context_.EndDrawing();
+  }
+
+ private:
+  Music            music_;
+  sjplayer.Context context_;
+}