SaveLoad.h

#pragma once

#include <string>
#include <fstream>
#include "maths.h"

struct ObjectState {
    Matrix worldMatrix;
};
struct GameState {
	Vec3 playerPosition;
	std::vector<ObjectState> objects;
};

class SaveSystem {
public:

    void saveGame(const GameState& state, const std::string& filename) {
        std::ofstream file("SaveData/" + filename);
        if (!file.is_open()) return;

        file << state.playerPosition.x << " "
            << state.playerPosition.y << " "
            << state.playerPosition.z << "\n";

        file << state.objects.size() << "\n";

        for (const auto& obj : state.objects) {
            for (int i = 0; i < 4; i++)
                for (int j = 0; j < 4; j++)
                    file << obj.worldMatrix.a[i][j] << " ";

            file << "\n";
        }

        file.close();
    }

    GameState loadGame(const std::string& filename) {
        GameState state;
        std::ifstream file("SaveData/" + filename);
        if (!file.is_open()) return state;

        file >> state.playerPosition.x
            >> state.playerPosition.y
            >> state.playerPosition.z;

        unsigned int count;
        file >> count;
        state.objects.resize(count);

        for (unsigned int i = 0; i < count; i++)
        {
            for (int j = 0; j < 4; j++)
                for (int k = 0; k < 4; k++)
                    file >> state.objects[i].worldMatrix.a[j][k];
        }

        file.close();
        return state;
    }

    bool findSave(std::string save) {
        std::wifstream saveSlot("SaveData/" + save);

        return (saveSlot.is_open());
    }
};