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C-/C++-Quelltext

#ifndef GAMESTATE_HPP
#define GAMESTATE_HPP

class GameState {
    public:
        //Executed at the beginning of each state
        virtual void init()=0;
        //Executed when a state is left (popped off the state stack)
        virtual void cleanup()=0;
     
        //Pushing and popping states causes pausing/resuming
        virtual void pause()=0;
        virtual void resume()=0;

        //Recieves input and performs actions as response
        virtual void getEvents()=0;
        //Executed each frame
        virtual void update()=0;
        //Executed each frame, having a separate Display-function for each state allows drawing of different things based on the current state
        virtual void render()=0;

        
};

#endif

C-/C++-Quelltext

#ifndef GAMESTATEMANAGER_HPP
#define GAMESTATEMANAGER_HPP

#include "GameState.hpp"
#include <vector>

class GameStateManager {
    public:
        //Will remove the current state from the stack and add a new state to the end of the stack
        void changeState(GameState* state);
        //Will pause the current state and add a new state to the end of the stack
        void pushState(GameState* state);
        //Will remove the last state on the stack and set the current state to the previous state on the stack
        void popState();
        void clear();

        //Will update the current state, handle it's events and render it
        void update();

    private:
        std::vector<GameState*> states;
};

#endif

C-/C++-Quelltext

int main()
{
    sf::RenderWindow app(sf::VideoMode(1280, 720, 32), "SFML Graphics");
    app.setVerticalSyncEnabled(true);
    GameStateManager stateManager;
    Game* game = new Game(&app);
    stateManager.pushState(game);

    while (app.isOpen()) {
        stateManager.update();

        //float Framerate = 1.f / elapsedTime.asSeconds();
        //int index = static_cast<int>((player.getPosition().x / 32) + static_cast<int>(player.getPosition().y / 32) * mapWidth);
        //std::cout << "FPS: " << Framerate << "  ||  Playerpos: " << index << "  ||  realx: " << player.getPosition().x << "  ||  realy: " << player.getPosition().y << std::endl;
    }

    delete game;

  return EXIT_SUCCESS;
}