[update] Re-implemented the scene transitions.

src/sj/AbstractGame.d

@@ -11,15 +11,13 @@ class AbstractGame {
  public:
   ///
   this(SceneInterface first_scene) in (first_scene) {
-    scene_ = first_scene;
+    next_scene_ = first_scene;
   }
 
   ///
   void Update(KeyInput input) {
-    if (auto next = scene_.TakeNextScene()) {
-      scene_ = next;
-    }
-    scene_.Update(input);
+    scene_      = next_scene_;
+    next_scene_ = scene_.Update(input);
   }
   ///
   void Draw() {
@@ -29,4 +27,6 @@ class AbstractGame {
 
  private:
   SceneInterface scene_;
+
+  SceneInterface next_scene_;
 }

src/sj/AbstractScene.d

@@ -1,31 +0,0 @@
-/// License: MIT
-module sj.AbstractScene;
-
-import sj.KeyInput,
-       sj.SceneInterface;
-
-///
-class AbstractScene : SceneInterface {
- public:
-  ///
-  this() {
-  }
-
-  abstract override {
-    void Update(KeyInput input);
-    void Draw();
-  }
-
-  override SceneInterface TakeNextScene() {
-    scope(exit) next_ = null;
-    return next_;
-  }
-
- protected:
-  void GoNextScene(SceneInterface next) in (next) {
-    next_ = next;
-  }
-
- private:
-  SceneInterface next_;
-}

src/sj/Game.d

@@ -24,6 +24,7 @@ class Game : AbstractGame {
     title_.SetupSceneDependency(select_);
     select_.SetupSceneDependency(title_);
 
+    title_.Initialize();
     super(title_);
   }
 

src/sj/SceneInterface.d

@@ -7,10 +7,7 @@ import sj.KeyInput;
 interface SceneInterface {
  public:
   ///
-  void Update(KeyInput input);
+  SceneInterface Update(KeyInput input);
   ///
   void Draw();
-
-  ///
-  SceneInterface TakeNextScene();
 }

src/sj/SelectScene.d

@@ -3,15 +3,15 @@ module sj.SelectScene;
 
 import derelict.sfml2.audio;
 
-import sj.AbstractScene,
-       sj.KeyInput,
+import sj.KeyInput,
        sj.LobbyWorld,
        sj.ProgramSet,
        sj.SceneInterface,
+       sj.TitleScene,
        sj.util.audio;
 
 ///
-class SelectScene : AbstractScene {
+class SelectScene : SceneInterface {
  public:
 
   ///
@@ -27,12 +27,19 @@ class SelectScene : AbstractScene {
   }
 
   ///
-  void SetupSceneDependency(SceneInterface title_scene) {
+  void SetupSceneDependency(TitleScene title_scene) {
     title_scene_ = title_scene;
   }
 
-  override void Update(KeyInput input) {
-    if (input.up) GoNextScene(title_scene_);
+  ///
+  void Initialize() {
+  }
+  override SceneInterface Update(KeyInput input) {
+    if (input.up) {
+      title_scene_.Initialize();
+      return title_scene_;
+    }
+    return this;
   }
   override void Draw() {
     lobby_.Draw();
@@ -53,7 +60,7 @@ class SelectScene : AbstractScene {
     }
   }
 
-  SceneInterface title_scene_;
+  TitleScene title_scene_;
 
   LobbyWorld lobby_;
 

src/sj/TitleScene.d

@@ -5,15 +5,15 @@ import std.math;
 
 import gl4d;
 
-import sj.AbstractScene,
-       sj.KeyInput,
+import sj.KeyInput,
        sj.LobbyWorld,
        sj.ProgramSet,
+       sj.SelectScene,
        sj.SceneInterface,
        sj.TitleTextProgram;
 
 ///
-class TitleScene : AbstractScene {
+class TitleScene : SceneInterface {
  public:
   ///
   enum TitleMatrix = {
@@ -26,20 +26,40 @@ class TitleScene : AbstractScene {
   ///
   this(LobbyWorld lobby, ProgramSet program) {
     lobby_ = lobby;
-    SetupLobby(lobby);
-
     title_ = program.Get!TitleTextProgram;
   }
 
   ///
-  void SetupSceneDependency(SceneInterface next_scene) {
-    next_scene_ = next_scene;
+  void SetupSceneDependency(SelectScene select) {
+    select_scene_ = select;
   }
 
-  override void Update(KeyInput input) {
+  ///
+  void Initialize() {
+    lobby_.view.pos    = vec3(0, -0.15, -1);
+    lobby_.view.target = vec3(0, -0.15, 0);
+    lobby_.view.up     = vec3(0, 1, 0);
+
+    lobby_.background.inner_color = vec4(0.9, 0.9, 0.9, 1);
+    lobby_.background.outer_color = vec4(-0.1, -0.1, -0.1, 1);
+
+    lobby_.light_pos                    = vec3(0, 9, -1);
+    lobby_.cube_material.diffuse_color  = vec3(0.1, 0.1, 0.1);
+    lobby_.cube_material.light_color    = vec3(1, 0.8, 0.8);
+    lobby_.cube_material.light_power    = vec3(100, 100, 100);
+    lobby_.cube_material.ambient_color  = vec3(0.2, 0.2, 0.2);
+    lobby_.cube_material.specular_color = vec3(0.5, 0.2, 0.2);
+
+    frame_ = 0;
+  }
+  override SceneInterface Update(KeyInput input) {
     lobby_.cube_matrix.rotation += vec3(PI/600, PI/600, PI/600);
 
-    if (input.down) GoNextScene(next_scene_);
+    if (input.down) {
+      select_scene_.Initialize();
+      return select_scene_;
+    }
+    return this;
   }
   override void Draw() {
     lobby_.Draw();
@@ -47,23 +67,7 @@ class TitleScene : AbstractScene {
   }
 
  private:
-  static void SetupLobby(LobbyWorld lobby) {
-    lobby.view.pos    = vec3(0, -0.15, -1);
-    lobby.view.target = vec3(0, -0.15, 0);
-    lobby.view.up     = vec3(0, 1, 0);
-
-    lobby.background.inner_color = vec4(0.9, 0.9, 0.9, 1);
-    lobby.background.outer_color = vec4(-0.1, -0.1, -0.1, 1);
-
-    lobby.light_pos                    = vec3(0, 9, -1);
-    lobby.cube_material.diffuse_color  = vec3(0.1, 0.1, 0.1);
-    lobby.cube_material.light_color    = vec3(1, 0.8, 0.8);
-    lobby.cube_material.light_power    = vec3(100, 100, 100);
-    lobby.cube_material.ambient_color  = vec3(0.2, 0.2, 0.2);
-    lobby.cube_material.specular_color = vec3(0.5, 0.2, 0.2);
-  }
-
-  SceneInterface next_scene_;
+  SelectScene select_scene_;
 
   LobbyWorld lobby_;