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1

Graphics / How to fix white square problem when used vectors?

« on: August 09, 2013, 04:54:25 pm »

Hi, first of all I know the "White square problem" described in the sprite tutorial. I understand it.

In my case, I create a Player class with a sprite and texture members. In main code, when  a user press M key, create a new instance of Player and add it into a vector. I known that the elements of a vector move in memory when the vector change and then lost the reference of the sprite texture.

Now, my question is how I can fix it? I tried with add setTexture every time I draw, but I don't know if its a good solution.

I attach an screenshoot about I'm saying.



I wrote a minimal example. This is the code, can download here.
I use SFML-2.1 with Code:Blocks (Windows 8 Pro, 32bits)

Player.h

//Player class

#ifndef PLAYER_H
#define PLAYER_H

#include <SFML/Graphics.hpp>
#include <iostream>

class Player
{
    public:
        Player(sf::Vector2i position, sf::Color colorSpr,  sf::String filenameSpr);
        ~Player();
        void Draw(sf::RenderWindow &Window);

        sf::Sprite sprPlayer;
        sf::Texture texturePlayer;
        int sprWidth, sprHeight;

    protected:
    private:
};

#endif
 

Player.cpp

#include "Player.h"

//constructor
Player::Player(sf::Vector2i position, sf::Color colorSpr,  sf::String filenameSpr)
{
    if(!texturePlayer.loadFromFile(filenameSpr, sf::IntRect(0, 0, 32, 32)))
        std::cout << "Error, can't load SpriteSheet " << std::endl;

    sprPlayer.setTexture(texturePlayer);
    sprPlayer.setColor(colorSpr);
    sprWidth = sprPlayer.getTextureRect().width;
    sprHeight = sprPlayer.getTextureRect().height;
    sprPlayer.setPosition(position.x * sprWidth, position.y * sprHeight);
}

//destructor
Player::~Player()
{
}

//draw player
void Player::Draw(sf::RenderWindow &Window)
{
    //sprPlayer.setTexture(texturePlayer); //<- with this it works
    Window.draw(sprPlayer);
}
 

Main.cpp

#include <SFML/Graphics.hpp>
#include <vector>
#include "Player.h"

const int maxPlayers = 10;

//colors for players
sf::Color pColors[maxPlayers] = {sf::Color(255, 0, 0, 255), sf::Color(0, 255, 0, 255),
                                 sf::Color(100, 100, 0, 255), sf::Color(0, 0, 255, 255),
                                 sf::Color(80, 200, 120, 255), sf::Color(100, 100, 155, 255),
                                 sf::Color(123, 160, 90, 255), sf::Color(200, 0, 255, 255),
                                 sf::Color(254, 195, 172, 255), sf::Color(255, 255, 255, 255)
                                   };
sf::String spriteSheets[maxPlayers] = {"punky2.png", "punky.png", "punky.png", "punky.png", "punky.png",
                                       "punky.png", "punky.png", "punky.png", "punky.png", "punky.png"
                                      };
int main()
{
    sf::Vector2i playerPosition(0, 0);
    int numRivals = 0;

    std::vector <Player> rivals;
    rivals.reserve(maxPlayers);

    sf::RenderWindow Window(sf::VideoMode(640, 480, 32), "Test");
    Window.setKeyRepeatEnabled(false);

    //create player
    Player hero(playerPosition, pColors[0], spriteSheets[0]);

    while (Window.isOpen())
    {
        sf::Event event;
        while (Window.pollEvent(event))
        {
            switch (event.type)
            {
            case sf::Event::Closed:
                {
                    Window.close();
                    break;
                }
            case sf::Event::KeyPressed:
                if (event.key.code == sf::Keyboard::Escape)
                {
                    Window.close();
                }
                else if (event.key.code == sf::Keyboard::Right)
                {
                    hero.sprPlayer.move(3, 0);
                }
                else if (event.key.code == sf::Keyboard::Left)
                {
                    hero.sprPlayer.move(-3, 0);
                }
                else if (event.key.code == sf::Keyboard::Down)
                {
                    hero.sprPlayer.move(0, 3);
                }
                else if (event.key.code == sf::Keyboard::Up)
                {
                    hero.sprPlayer.move(0, -3);
                }
                else if (event.key.code == sf::Keyboard::M)
                {
                    if (numRivals < maxPlayers - 1)
                    {
                        numRivals++;
                        Player rival(sf::Vector2i(3 + numRivals, 0), pColors[numRivals], spriteSheets[numRivals]);
                        rivals.push_back(rival);
                    }
                }
                break;
           }
        }

        //draw stuff
        hero.Draw(Window);
        if (numRivals > 0)
        {
            for (int k = 0; k < rivals.size(); k++)
            {
                rivals[k].Draw(Window);
            }
        }

        Window.display();
        Window.clear(sf::Color(255, 255, 0, 255));
    }
    return 0;
}
 

2

Network / [SOLVED]How to limit the number of TCP clients

« on: August 06, 2013, 05:44:51 pm »

I’m making a simple game with TCP Client/Server communication. In the server I have a TcpListener and SocketSelector.

I want to limit the number of clients that can connect to the server to 4. My question is in SFML as I can tell to the server that if have 4 clients, do not accept more connection requests and stop listening new connections? I try with listener.close() but then does not receive data from the existing 4 players.

Any idea? Thanks.

3

General discussions / Thank You

« on: April 30, 2013, 11:28:09 pm »

Hi, I just discovered SFML some weeks ago and I still learning this great API.
Today I have seen the new website and downloaded the final 2.0 release. It looks awesome. Thank you Laurent for your work.

#include <SFML/Graphics.hpp>

int main()
{
    sf::RenderWindow window(sf::VideoMode(800, 600, 32), "Hello SFML forum");

    sf::Text message;
    sf::Font font;
    if (!font.loadFromFile("Font1.ttf"))
        return EXIT_FAILURE;

    message.setString("Hello SFML forum users, I'm Ivan");
    message.setFont(font);
    message.setCharacterSize(16);
    message.setColor(sf::Color(255, 255, 0, 255));
    message.setPosition(sf::Vector2f(20, 20));

    while (window.isOpen())
    {
        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed ||
                event.key.code == sf::Keyboard::Escape)
                window.close();
        }

        window.clear(sf::Color::Black);
        window.draw(message);
        window.display();
    }

    return EXIT_SUCCESS;
}