scenemanager.h

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#pragma once
 
#include <string>
#include <atomic>
 
#include "scene.h"
#include "camera.h"
#include <SDL2/SDL.h>
#include <nlohmann/json.hpp>
 
class SceneManager
{
    private:
        SDL_Renderer* m_renderer; 
        std::vector<SceneTree*> m_sceneTrees; 
 
        int m_currentSceneIndex = -1; 
        Camera* m_camera;
 
        SceneManager();
 
        SceneManager(const SceneManager&) = delete;
 
        void operator=(const SceneManager&) = delete;
 
    public:
        static SceneManager& getInstance();
 
        static std::atomic<uint64_t> m_totalObjects; 
        static std::atomic<uint64_t> m_aliveObjects; 
 
        bool isDemo = false;
 
        void setRenderer(SDL_Renderer* renderer);
 
        void loadDemo();
 
        void loadScenesFromJSON(const std::string& filePath);
 
        void getNextScene();
 
        int getSceneIndex();
 
        SDL_Renderer* getRenderer();
 
        SceneTree* getSceneTree();
 
        void cleanTree();
 
        Vec2 getCameraWorldPosition();
 
        SceneTree* createSceneTest1();
        SceneTree* createSceneTest2();
        SceneTree* createSceneTest3();
 
        void input();
 
        void update();
 
        void render();
};