Messages

1

Graphics / Re: Sprite from Drawable object not appearing in window

« on: February 04, 2025, 05:14:54 pm »

Thank you both for your help, Problem solved!

P.S. slightly embarrassing that I somehow missed the resetRect parameter on setTexture, ah well, thanks again!

2

Graphics / Sprite from Drawable object not appearing in window

« on: February 04, 2025, 07:02:33 am »

Hello, I am working on a project using SFML 3.0.0 that involves creating a class that inherits Drawable. The class simply has a Texture and a Sprite with the Texture being loaded from a png file. However, when I create an instance of the class in my main function and draw it in the window loop, nothing appears. I am on MacOs Sequoia (15.2). I've created a minimal example that reproduces my problem so here it is:

MyDrawable.cpp:

Code: [Select]

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

class MyDrawable : public sf::Drawable {
public:
    MyDrawable();
    virtual void draw(sf::RenderTarget& target, sf::RenderStates states) const override;
private:
    sf::Texture texture;
    sf::Sprite sprite;
};

MyDrawable::MyDrawable() : sprite(texture) {
    if (!texture.loadFromFile("image.png")) {
        std::cerr << "Error loading texture!" << std::endl;
    } else {
        sprite.setTexture(texture);
    }
}

void MyDrawable::draw(sf::RenderTarget& target, sf::RenderStates states) const {
    target.draw(sprite, states);
}

main.cpp:

Code: [Select]

#include <SFML/Window.hpp>
#include <SFML/Graphics.hpp>
#include <SFML/System.hpp>
#include "MyDrawable.cpp"

int main() {
    sf::RenderWindow window(sf::VideoMode({800, 800}), "Window");
    MyDrawable drawable;
   
    while (window.isOpen()) {
        while (const std::optional event = window.pollEvent())
        {
            if (event->is<sf::Event::Closed>())
                window.close();
        }

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

    return 0;
}

Here's some debugging steps I've tried so far:

• I checked the size of the Texture after it was loaded which was 22x22 (correct for the image I'm using) but then I checked the local bounds of the sprite after applying the texture to it and they were 0x0.
• After creating my drawable object in the main file, I saved the image back to a file by calling sprite.getTexture().copyToImage().saveToFile() and the output image is the same as the one that was uploaded to the texture.
• I also created a texture and sprite directly in the main file with the texture loading the same image, and when I draw that one it shows in the window no problem.

I've been trying to solve this with no luck, on one hand if the sprite has local bounds of 0x0 that makes me think the sprite is not correctly pointing to my texture. But on the other hand, calling getTexture() on the sprite and saving it to an image file shows the correct png, which makes me think the sprite is pointing to the texture. Any help is greatly appreciated!