Topics

1

Network / [SOLVE] Multi-clients problems

« on: July 08, 2016, 11:50:34 pm »

Hi there !

I've make an simple multiplayer game, but... when I want to make a login system, there are some issues.
Indeed, When the client one  connect to the server and log in, not probleme, his move are good, but when I connect a second client and log in, the moves of the two players are crazy.
Can someone explain me what are the error ?
Because all the physic of the game are managed by the server, and the move should be one pixel by pixel, to be aligned to a 16x16 grid...

Thanks you for your help.

https://github.com/Axenntio/NetworkingSFML

2

Network / Manage Client on the server

« on: December 06, 2015, 06:32:30 pm »

HI everyone, I continue my projet to make a multiplayer game, but i've got a problem:
How can I manage each client on the server ?
Because, All the clients give their X and Y position to the server, but how can I give X and Y position of all the clients to each other ?

I've actually these codes:

Client:

(click to show/hide)

#include <SFML/Graphics.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Network.hpp>
#include <string>
#include <iostream>

#define PORT 2903
#define MAXPLAYER 10
#define SCALE 1
#define SCREENX 320*SCALE
#define SCREENY 180*SCALE
#define PLAYERX 16
#define PLAYERY 24

void init();

struct Entity{
        std::string name;
        int lvl;
        int x;
        int y;
        int direction;
};

struct Login{
        int id;
        int mdp;
        int out;
};

sf::RenderWindow window;
sf::Texture spr_player;
sf::Sprite obj_player;
 
sf::Packet& operator <<(sf::Packet& packet, const Entity& entity){return packet << entity.name << entity.lvl << entity.x << entity.y << entity.direction;}
sf::Packet& operator >>(sf::Packet& packet, Entity& entity){      return packet >> entity.name >> entity.lvl >> entity.x >> entity.y >> entity. direction;}

sf::Packet& operator <<(sf::Packet& packet, const Login& login){return packet << login.id << login.mdp << login.out;}
sf::Packet& operator >>(sf::Packet& packet, Login& login){              return packet >> login.id >> login.mdp >> login.out;}

Entity tmpPlayer[MAXPLAYER];

int main(int argc, char* argv[]){
        init();
        std::cout<<"Started..."<<std::endl;
        sf::IpAddress ip=sf::IpAddress::getLocalAddress();
        sf::TcpSocket socket;

        Entity player;

        //std::cin>>player.name;
        player.name="Player";
        player.lvl = 1;
        player.x=0;
        player.y=0;
        player.direction=0;
        socket.connect(ip, PORT);
        while(window.isOpen()){
                sf::Event event;
                while(window.pollEvent(event)){
                        if (event.type == sf::Event::Closed)
                        window.close();
                }
                if(sf::Keyboard::isKeyPressed(sf::Keyboard::Q)){player.x--;}
                else if(sf::Keyboard::isKeyPressed(sf::Keyboard::D)){player.x++;}
                if(sf::Keyboard::isKeyPressed(sf::Keyboard::Z)){player.y--;}
                else if(sf::Keyboard::isKeyPressed(sf::Keyboard::S)){player.y++;}

                sf::Packet packet;
                packet<<player;
                socket.send(packet);

                window.clear();
                obj_player.setPosition(player.x*SCALE ,player.y*SCALE);
                obj_player.setTextureRect(sf::IntRect(0*PLAYERX, player.direction*PLAYERY, PLAYERX, PLAYERY));
                window.draw(obj_player);
                window.display();
        }
        return 0;
}

void init(){
        window.create(sf::VideoMode(SCREENX, SCREENY), "Client");
        window.setFramerateLimit(60);
        spr_player.loadFromFile("assets/spr_player.png");
        obj_player.setTexture(spr_player);
        obj_player.setScale(SCALE,SCALE);
}

Server:

(click to show/hide)

#include <SFML/Graphics.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Network.hpp>
#include <string>
#include <list>
#include <iostream>

#define PORT 2903
#define MAXPLAYER 10
#define SCALE 1
#define SCREENX 320*SCALE
#define SCREENY 180*SCALE
#define PLAYERX 16
#define PLAYERY 24

void init();

struct Entity{
        std::string name;
        int lvl;
        int x;
        int y;
        int direction;
};

struct Login{
        std::string id;
        std::string mdp;
        int out;
};

sf::RenderWindow window;
sf::Texture spr_player;
sf::Sprite obj_player;

sf::Packet& operator <<(sf::Packet& packet, const Entity& entity){return packet << entity.name << entity.lvl << entity.x << entity.y << entity.direction;}
sf::Packet& operator >>(sf::Packet& packet, Entity& entity){      return packet >> entity.name >> entity.lvl >> entity.x >> entity.y >> entity. direction;}

sf::Packet& operator <<(sf::Packet& packet, const Login& login){return packet << login.id << login.mdp << login.out;}
sf::Packet& operator >>(sf::Packet& packet, Login& login){              return packet >> login.id >> login.mdp >> login.out;}


int playerIndex=0;
Entity tmpPlayer[MAXPLAYER];

int main(int argc, char* argv[]){
        init();
        std::cout<<"Started !"<<std::endl;

        std::list<sf::TcpSocket*> clients;
        sf::SocketSelector selector;
        sf::Packet packet;

        Entity tmpEntity;

        sf::TcpListener listener;
        listener.setBlocking(false);
        listener.listen(PORT);
        selector.add(listener);
        while(window.isOpen()){
                sf::Event event;
                while(window.pollEvent(event)){
                        if (event.type == sf::Event::Closed)
                        window.close();
                }
                if (selector.wait()){
                        if (selector.isReady(listener)){
                                sf::TcpSocket* client = new sf::TcpSocket;
                                if (listener.accept(*client) == sf::Socket::Done){
                                        clients.push_back(client);
                                        selector.add(*client);
                                }
                                else{
                                        delete client;
                                }
                        }
                        else{
                                playerIndex=0;
                                for (std::list<sf::TcpSocket*>::iterator it = clients.begin(); it != clients.end(); ++it){
                                        sf::TcpSocket& client = **it;
                                        if (selector.isReady(client)){
                                                if (client.receive(packet) == sf::Socket::Done){
                                                        packet>>tmpPlayer[playerIndex];
                                                        playerIndex++;
                                                }
                                        }
                                }
                                window.clear();
                                for(int i=0;i<playerIndex;i++){
                                        obj_player.setPosition(tmpPlayer[i].x*SCALE ,tmpPlayer[i].y*SCALE);
                                        obj_player.setTextureRect(sf::IntRect(0*PLAYERX, tmpPlayer[i].direction*PLAYERY, PLAYERX, PLAYERY));
                                        window.draw(obj_player);
                                }
                                window.display();
                        }
                }
        }
        return 0;
}

void init(){
        window.create(sf::VideoMode(SCREENX, SCREENY), "Server");
        window.setFramerateLimit(60);
        spr_player.loadFromFile("assets/spr_player.png");
        obj_player.setTexture(spr_player);
        obj_player.setScale(SCALE,SCALE);
}

And with this, how can I give a ID link to the IP
with a array like this:

Id Array	Axenntio	Enadrix	Ruhtrax
Ip Array	Ip1	Ip2	Ip3

To use this with a function like

message("You are Axenntio","Axenntio");

void message(std::string text,std::string id){
        // Loop that link the Id with the Ip array
        //Then send the message to the client Axenntio
}
 

3

Network / Trying to make a server with multiple connections

« on: May 02, 2015, 11:27:31 pm »

Hi everyone ! I've got some weird problem with my code...
The first time, I've make an array and if a client disconnected, I push the last elements to overwrite the client disconnected

for(int i=0;i<coNumber /*Number of connected clients*/;i++){
    if(socket[i].receive(packet)!=sf::Socket::Done){
        coNumber--; //Remove one client
        for(int j=i;j<coNumber;j++){
            socket[i]=socket[i+1];
        }
    }
}
 

But got the awesome

NonCopyable error

So I've ask to Lukas/eXpl0it3r (Thanks to him !)
And suggest me to use

std::vector<std::unique_ptr<sf::TcpSocket>> socket;
 

instead of

sf::TcpSocketsocket[MAXCONNECTIONS];
 

play with somes pointers, and then get stuck...
An error occured with this line:

if(listener.accept(*socket[coNumber])==sf::Socket::Done && coNumber<MAXCONNEXIONS){
 

No error during compiling, but during the execution (Application not responding)

Error 255

So there is my actual code:

(click to show/hide)

#include <SFML/Graphics.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Network.hpp>
#include <string>
#include <memory>
#include <iostream>

#define PORT 2903
#define MAXCONNEXIONS 10

struct Entity{
    std::string name;
    int lvl;
    int x;
    int y;
    int direction;
};
 
sf::Packet& operator <<(sf::Packet& packet, const Entity& entity) {
    return packet << entity.name << entity.lvl << entity.x << entity.y << entity.direction;
}
 
sf::Packet& operator >>(sf::Packet& packet, Entity& entity) {
    return packet >> entity.name >> entity.lvl >> entity.x >> entity.y >> entity. direction;
}

int main(int argc, char* argv[]){
        std::cout<<"Started !"<<std::endl;
        std::vector<std::unique_ptr<sf::TcpSocket>> socket;
        int coNumber = 0;
        sf::Packet packet;

        Entity tmpEntity;

        sf::TcpListener listener;
        listener.setBlocking(false);
        listener.listen(PORT);
        while(1){
                if(listener.accept(*socket[coNumber])==sf::Socket::Done && coNumber<MAXCONNEXIONS){
                        coNumber++;
                }
                if(coNumber>0){
                        for(int i=0;i<coNumber;i++){
                                if(socket[i]->receive(packet)!=sf::Socket::Done){
                                        coNumber--;
                                }
                                if(packet>>tmpEntity){
                                        std::cout<<tmpEntity.name<<","<<tmpEntity.lvl<<","<<tmpEntity.x<<","<<tmpEntity.y<<","<<tmpEntity.direction<<std::endl;
                                }
                        }
                }
        }
        return 0;
}
 

Thanks for your help !