Refactor and prepare for scene changing

Changelog:
- Rename scene.* to engine.* as the game engine is tied to the
  base scene struct
- Combine *_impl.h into a single header
- Rename scene implementation source code file
- Add GameEngine struct and SceneState enum

engine/CMakeLists.txt

@@ -1,8 +1,8 @@
 add_subdirectory(EC)
 add_library(lib_scenes STATIC
-    scene.c
-    scene_impl.c
-    menu_impl.c
+    engine.c
+    editor_scene.c
+    menu_scene.c
     game_systems.c
     AABB.c
     gui.c

engine/engine.c

@@ -1,4 +1,4 @@
-#include "scene.h"
+#include "engine.h"
 
 void init_scene(Scene_t *scene, SceneType_t scene_type, system_func_t render_func, action_func_t action_func)
 {
@@ -9,8 +9,7 @@ void init_scene(Scene_t *scene, SceneType_t scene_type, system_func_t render_fun
     scene->scene_type = scene_type;
     scene->render_function = render_func;
     scene->action_function = action_func;
-    scene->paused = false;
-    scene->has_ended = false;
+    scene->state = SCENE_ENDED;
 }
 
 void free_scene(Scene_t *scene)

engine/engine.h

@@ -1,15 +1,31 @@
-#ifndef __SCENE_H
-#define __SCENE_H
+#ifndef __ENGINE_H
+#define __ENGINE_H
 #include "entManager.h"
 #include "actions.h"
 #include "sc/array/sc_array.h"
+typedef struct Scene Scene_t;
+
+typedef struct GameEngine
+{
+    Scene_t *scenes;
+    unsigned int max_scenes;
+    unsigned int curr_scene;
+}GameEngine_t;
+void change_scene(GameEngine_t *engine);
+
 typedef enum SceneType
 {
     LEVEL_SCENE = 0,
     MENU_SCENE,
 }SceneType_t;
 
-typedef struct Scene Scene_t;
+typedef enum SceneState
+{
+    SCENE_PLAYING = 0,
+    SCENE_SUSPENDED,
+    SCENE_ENDED,
+}SceneState_t;
+
 typedef void(*system_func_t)(Scene_t *);
 typedef void(*action_func_t)(Scene_t *, ActionType_t, bool);
 sc_array_def(system_func_t, systems);
@@ -22,9 +38,9 @@ struct Scene
     action_func_t action_function;
     EntityManager_t ent_manager;
     SceneType_t scene_type;
+    SceneState_t state;
     void * scene_data;
-    bool paused;
-    bool has_ended;
+    GameEngine_t *engine;
 };
 
 // Inline functions, for convenience
@@ -35,4 +51,4 @@ extern void do_action(Scene_t *scene, ActionType_t action, bool pressed);
 void init_scene(Scene_t *scene, SceneType_t scene_type, system_func_t render_func, action_func_t action_func);
 void free_scene(Scene_t *scene);
 
-#endif // __SCENE_H
+#endif // __ENGINE_H

engine/menu_impl.h

@@ -1,28 +0,0 @@
-#ifndef __MENU_IMPL_H
-#define __MENU_IMPL_H
-#include "scene.h"
-#include "gui.h"
-
-typedef enum GuiMode
-{
-    KEYBOARD_MODE,
-    MOUSE_MODE
-}GuiMode_t;
-
-typedef struct MenuSceneData
-{
-    UIComp_t buttons[3];
-    int selected_comp;
-    int max_comp;
-    GuiMode_t mode;
-}MenuSceneData_t;
-
-typedef struct MenuScene
-{
-    Scene_t scene;
-    MenuSceneData_t data;
-}MenuScene_t;
-
-void init_menu_scene(MenuScene_t *scene);
-void free_menu_scene(MenuScene_t *scene);
-#endif

engine/menu_scene.c

@@ -1,4 +1,4 @@
-#include "menu_impl.h"
+#include "scene_impl.h"
 #include "raymath.h"
 #include <stdio.h>
 

engine/scene_impl.h

@@ -4,7 +4,9 @@
  * */
 #ifndef __SCENE_IMPL_H
 #define __SCENE_IMPL_H
-#include "scene.h"
+#include "engine.h"
+#include "gui.h"
+
 typedef struct Tile
 {
     bool solid;
@@ -35,4 +37,27 @@ typedef struct LevelScene
 void init_level_scene(LevelScene_t *scene);
 void free_level_scene(LevelScene_t *scene);
 void reload_level_scene(LevelScene_t *scene);
+
+typedef enum GuiMode
+{
+    KEYBOARD_MODE,
+    MOUSE_MODE
+}GuiMode_t;
+
+typedef struct MenuSceneData
+{
+    UIComp_t buttons[3];
+    int selected_comp;
+    int max_comp;
+    GuiMode_t mode;
+}MenuSceneData_t;
+
+typedef struct MenuScene
+{
+    Scene_t scene;
+    MenuSceneData_t data;
+}MenuScene_t;
+
+void init_menu_scene(MenuScene_t *scene);
+void free_menu_scene(MenuScene_t *scene);
 #endif // __SCENE_IMPL_H

main.c

@@ -1,5 +1,5 @@
 #include "raylib.h"
-#include "scene.h"
+#include "engine.h"
 #define N_SCENES 3
 
 Scene_t scenes[N_SCENES];

menu_test.c

@@ -1,5 +1,5 @@
 #include "mempool.h"
-#include "menu_impl.h"
+#include "scene_impl.h"
 #include <stdio.h>
 #include <unistd.h>