Messages

1

General / Re: image cannot display

« on: November 25, 2023, 06:42:53 pm »

I know the reason, if put sf::Texture t to class member, it work.

2

General / image cannot display

« on: November 25, 2023, 05:59:42 pm »

I create a sfml project with cmake on windows, but image cannot display

bye the way, I am a beginner of c++ and sfml, so ignore the style of code, I just want it work.

src/main.cpp

#include "game.hpp"
#include <SFML/Graphics.hpp>

int main() {

    Game game;

    sf::Clock clock;
    sf::Time elapsed;

    float frametime = 1.0f / 60.0f;

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

        // 1. 事件处理
        game.handleInput();

        // 2. 更新物理逻辑
        if (elapsed.asSeconds() >= frametime) {
            elapsed -= sf::seconds(frametime);
            game.update(); // 60次/秒
        }
        elapsed += clock.restart();

        // 3. 渲染
        game.window.clear();
        game.render();
        game.window.display();
    }

    return 0;
}
 

src/game.hpp

class Game {
  public:
    sf::RenderWindow window;

    sf::Sprite s;

    Game() {
        window.create({320, 480}, "hello");

        sf::Texture t;
        t.loadFromFile("images/tiles.png");

        s.setTexture(t);
    }

    void handleInput() {}

    void update() {}

    void render() { window.draw(s); }
};
 

but if I put draw code into main.cpp, it's work, I dont know why. like this:
src/main.cpp

       ...
        // 3. 渲染
        game.window.clear();
        // game.render();
        sf::Texture t;
        t.loadFromFile("images/tiles.png");

        sf::Sprite s(t);
        game.window.draw(s);
        game.window.display();
       ...