GameInstance.hpp

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#pragma once
 
#include <functional>
#include <type_traits>
 
#include "PlayerController.hpp"
#include "Core/EngineSubsystem.hpp"
 
class Player;
class World;

#define SET_DEFAULT_SUBCLASS(def, set) \
static struct __##set##_DEFAULT_SUBCLASS_REGISTER { \
    __##set##_DEFAULT_SUBCLASS_REGISTER() { \
        __DEFAULT_INSTANTIATORS::get_##def() = []() -> def* { return new set(); }; \
    } \
} __##set##_DEFAULT_SUBCLASS_REGISTER_i;

class GameInstance : public IEngineSubsystem
{
public:
    static GameInstance* get();
    virtual void Resolve() noexcept override;
 
    void LoadSubobjects();

    World* GetWorld() const;
    PlayerController* GetPlayerController() const;

    void RequestShutdown();

    bool _isMainTickRunning;
    float FRAMES_PER_SECOND;
    int MS_REPEAT_THRESHOLD;
 
private:
    GameInstance();
    ~GameInstance();
    GameInstance(const GameInstance&) = delete;
    GameInstance& operator = (const GameInstance&) = delete;
    GameInstance(GameInstance&&) = delete;
    GameInstance& operator = (GameInstance&&) = delete;
 
private:
 
    PlayerController* ActivePlayerController;
    World* world;
 
};
 
namespace __DEFAULT_INSTANTIATORS {
    inline std::function<Player*()>& get_Player() {
        static std::function<Player*()> f;
        return f;
    }
    inline std::function<PlayerController*()>& get_PlayerController() {
        static std::function<PlayerController*()> f;
        return f;
    }
}