Allow optional inits for scene

Particle system and entity management are now optional during scene
init.

engine/engine.c

@@ -150,13 +150,20 @@ void update_sfx_list(GameEngine_t* engine)
     engine->sfx_list.played_sfx = 0;
 }
 
-void init_scene(Scene_t* scene, action_func_t action_func)
+void init_scene(Scene_t* scene, action_func_t action_func, uint32_t subsystem_init)
 {
     sc_map_init_64(&scene->action_map, 32, 0);
     sc_array_init(&scene->systems);
+    if (subsystem_init & ENABLE_ENTITY_MANAGEMENT_SYSTEM)
+    {
         init_entity_manager(&scene->ent_manager);
+    }
+    if (subsystem_init & ENABLE_PARTICLE_SYSTEM)
+    {
         init_particle_system(&scene->part_sys);
+    }
 
+    scene->subsystem_init = subsystem_init;
     //scene->scene_type = scene_type;
     scene->layers.n_layers = 0;
     scene->bg_colour = WHITE;
@@ -184,8 +191,16 @@ void free_scene(Scene_t* scene)
     {
         UnloadRenderTexture(scene->layers.render_layers[i].layer_tex);
     }
+
+    if (scene->subsystem_init & ENABLE_ENTITY_MANAGEMENT_SYSTEM)
+    {
         free_entity_manager(&scene->ent_manager);
+    }
+
+    if (scene->subsystem_init & ENABLE_PARTICLE_SYSTEM)
+    {
         deinit_particle_system(&scene->part_sys);
+    }
 }
 
 inline void update_scene(Scene_t* scene, float delta_time)
@@ -198,7 +213,10 @@ inline void update_scene(Scene_t* scene, float delta_time)
     {
         sys(scene);
     }
+    if (scene->subsystem_init & ENABLE_PARTICLE_SYSTEM)
+    {
         update_particle_system(&scene->part_sys, scene->delta_time);
+    }
 }
 
 static void _internal_render_scene(Scene_t* scene)

engine/engine.h

@@ -60,6 +60,7 @@ typedef struct SceneRenderLayers {
 struct Scene {
     // Not all scene needs an entity manager
     // but too late to change this
+    uint32_t subsystem_init;
     EntityManager_t ent_manager;
     Scene_t* parent_scene;
     struct sc_map_64 action_map; // key -> actions
@@ -99,7 +100,10 @@ extern void update_scene(Scene_t* scene, float delta_time);
 extern void render_scene(Scene_t* scene);
 extern void do_action(Scene_t* scene, ActionType_t action, bool pressed);
 
-void init_scene(Scene_t* scene, action_func_t action_func);
+//void init_scene(Scene_t* scene, action_func_t action_func);
+#define ENABLE_ENTITY_MANAGEMENT_SYSTEM (1)
+#define ENABLE_PARTICLE_SYSTEM (1 << 1)
+void init_scene(Scene_t* scene, action_func_t action_func, uint32_t subsystem_init);
 bool add_scene_layer(Scene_t* scene, int width, int height, Rectangle render_area);
 void free_scene(Scene_t* scene);
 void add_child_scene(GameEngine_t* engine, unsigned int child_idx, unsigned int parent_idx);

scene_man_test.c

@@ -109,7 +109,7 @@ int main(void)
     for (uint8_t i = 0; i < 6; ++i)
     {
         scenes[i] = &dummy_scenes[i].scene;
-        init_scene(&dummy_scenes[i].scene, &level_do_action);
+        init_scene(&dummy_scenes[i].scene, &level_do_action, 0);
         dummy_scenes[i].scene.engine = &engine;
         dummy_scenes[i].number = i;
         add_scene_layer(

scenes/editor_scene.c

@@ -1146,7 +1146,7 @@ static void at_level_complete(Scene_t* scene)
 
 void init_sandbox_scene(LevelScene_t* scene)
 {
-    init_scene(&scene->scene, &level_do_action);
+    init_scene(&scene->scene, &level_do_action, ENABLE_ENTITY_MANAGEMENT_SYSTEM | ENABLE_PARTICLE_SYSTEM);
     init_entity_tag_map(&scene->scene.ent_manager, PLAYER_ENT_TAG, 4);
     init_entity_tag_map(&scene->scene.ent_manager, BOULDER_ENT_TAG, MAX_COMP_POOL_SIZE);
     init_entity_tag_map(&scene->scene.ent_manager, LEVEL_END_TAG, 16);

scenes/game_scene.c

@@ -478,7 +478,7 @@ static void at_level_complete(Scene_t* scene)
 
 void init_game_scene(LevelScene_t* scene)
 {
-    init_scene(&scene->scene, &level_do_action);
+    init_scene(&scene->scene, &level_do_action, ENABLE_ENTITY_MANAGEMENT_SYSTEM | ENABLE_PARTICLE_SYSTEM);
     init_entity_tag_map(&scene->scene.ent_manager, PLAYER_ENT_TAG, 4);
     init_entity_tag_map(&scene->scene.ent_manager, BOULDER_ENT_TAG, MAX_COMP_POOL_SIZE);
     init_entity_tag_map(&scene->scene.ent_manager, LEVEL_END_TAG, 16);

scenes/level_select_scene.c

@@ -104,7 +104,7 @@ static void level_select_do_action(Scene_t* scene, ActionType_t action, bool pre
 #define SCROLL_TOTAL_HEIGHT 800
 void init_level_select_scene(LevelSelectScene_t* scene)
 {
-    init_scene(&scene->scene, &level_select_do_action);
+    init_scene(&scene->scene, &level_select_do_action, 0);
     add_scene_layer(
         &scene->scene, 400, 800,
         (Rectangle){START_X, START_Y, 400, 800}

scenes/menu_scene.c

@@ -138,7 +138,7 @@ static void gui_loop(Scene_t* scene)
 
 void init_menu_scene(MenuScene_t* scene)
 {
-    init_scene(&scene->scene, &menu_do_action);
+    init_scene(&scene->scene, &menu_do_action, 0);
 
     sc_array_add(&scene->scene.systems, &gui_loop);
     sc_array_add(&scene->scene.systems, &menu_scene_render_func);

water_test.c

@@ -400,7 +400,7 @@ int main(void)
 
     LevelScene_t scene;
     scene.scene.engine = &engine;
-    init_scene(&scene.scene, &level_do_action);
+    init_scene(&scene.scene, &level_do_action, ENABLE_ENTITY_MANAGEMENT_SYSTEM);
     init_entity_tag_map(&scene.scene.ent_manager, PLAYER_ENT_TAG, 4);
     init_entity_tag_map(&scene.scene.ent_manager, DYNMEM_ENT_TAG, 16);
     init_level_scene_data(