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1

General / C++/SFML: display several shapes simultaneously on screen

« on: February 22, 2024, 11:05:51 am »

Hello. I'm a beginner in c++ and I'm learning SFML. I have coded a small program to simultaneously display several shapes of different size, color and position on the screen, but I don't understand why there is just one shape that is displayed when the code is executed. Please help me.

#include <SFML/Graphics.hpp>

#include <stdlib.h>     /* srand, rand */
#include <time.h>       /* time */

#include <iostream>

using std::vector;

using std::cout;
using std::cin;
using std::endl;



int main()
{
    sf::RenderWindow window(sf::VideoMode(800, 600), "SFML works!");

    vector<sf::RectangleShape> vecRec(25);

    srand(time(NULL));

    int r, g, b = rand()%255+1;

    sf::Vector2f recSize(rand()%40+20, rand()%40+20);
    sf::Vector2f recPos(rand()%760+1, rand()%560+1);

    while (window.isOpen()) {
        sf::Event event;
        while (window.pollEvent(event)) {
            if (event.type == sf::Event::Closed)
                window.close();
        }

        window.clear();


        sf::RectangleShape rec;
        rec.setFillColor(sf::Color(r,g,b));
        rec.setSize(recSize);
        rec.setPosition(recPos);
        vecRec.push_back(rec);

        /*for(auto& r: vecRec){
            window.draw(r);
        }*/

        for(int i=0; i<vecRec.size();i++){
            window.draw(vecRec[i]);
        }


        window.display();
    }

    return 0;
}
 

2

Graphics / SFML text display problem under Linux

« on: May 09, 2023, 01:07:26 pm »

Hello. I am learning C++ and SFML under Linux(Pop!_OS 22.04 LTS). I run some code ()to display some text on my window, I have no error when running, but the text does not display. Please help me.

Note: I did the library inclusions and the constants declaration in another file(.hpp).

#include "main.hpp"
 
#include <iostream>
 
sf::Font font;
 
int main(){
 
 
    void gestionEntrees(sf::Event, sf::RenderWindow &window);
 
    void chargerPolice();
 
   
    sf::Text txt;
    txt.setFont(font);
    txt.setString("Hello, World.");
    txt.setCharacterSize(26);
    txt.setFillColor(sf::Color::Blue);
    txt.setStyle(sf::Text::Bold | sf::Text::Underlined);
 
   
 
    sf::RenderWindow window(sf::VideoMode(LARGEUR_FENETRE, HAUTEUR_FENETRE, 32), "Mon premier jeu", sf::Style::Titlebar | sf::Style::Resize | sf::Style::Close);
 
    window.setVerticalSyncEnabled(true);
 
    while(window.isOpen()){
 
        sf::Event event;
        while(window.pollEvent(event)){
            // fermeture de la fenêtre lorsque l&#39;utilisateur le souhaite
            gestionEntrees(event, window);
             
        }
 
       
        window.clear(sf::Color::White);
 
         
       
        window.draw(txt);
 
         
        window.display();
 
    }
 
    return 0;
 
}
 
 
void gestionEntrees(sf::Event event, sf::RenderWindow &window){
    if (event.type == sf::Event::Closed)
        window.close();
}
 
//Load font
void chargerPolice(){
    if (!font.loadFromFile("/usr/share/fonts/opentype/noto/NotoSansCJK-Black.ttc"))
        throw("Erreur de chargement de police");
}
 

3

Window / Title bar display and closing problem

« on: May 06, 2023, 02:05:05 pm »

I'm a beginner in C++ and SFML for game creation under linux(Pop!_OS 22.04 LTS). I tested the code on the official SFML website, everything seems to work but the title bar doesn't display; it's the same with other codes. I need your help, please. Here is an example of a code I tested:

#include <SFML/Graphics.hpp>
#include <SFML/System.hpp>
#include <SFML/Window.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Network.hpp>
 
 
int main()
{
    sf::RenderWindow window(sf::VideoMode(640, 480), "SFML works!", sf::Style::Titlebar);
    sf::Event ev;
 
    while(window.isOpen()){
       
        while(window.pollEvent(ev)){
 
            switch(ev.type){
                case sf::Event::Closed:
                    window.close();
                    break;
                case sf::Event::KeyPressed:
                    if(ev.key.code == sf::Keyboard::Escape){
                        window.close();
                        break;
                    }
                default:
                    break;
            }
             
        }
 
        //Render
        window.clear(sf::Color::Blue);
        window.display();
    }
 
    return 0;
}