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Audio / [Help] Sound attenuation

« on: September 28, 2024, 08:47:51 pm »

Hello folks,
I am playing with the sound in SFML. And my code does not make any difference with respect to the attention. I would appreciate it if someone corrects me. Or if the example code is correct, can it be my eaphone setting?

Thanks for your time

#include <SFML/Audio.hpp>
#include <SFML/Graphics.hpp>
#include <cmath>


 namespace
 {
    const float ListenerZ = 10.f;
    const float Attenuation = 1.f;
    const float MinDistance2D = 0.1f;
    const float MinDistance3D =  
      std::sqrt(MinDistance2D*MinDistance2D + ListenerZ*ListenerZ);
 }

int main() {
    // Load a sound buffer from a file
    sf::SoundBuffer buffer;
    if (!buffer.loadFromFile("Media/sound.wav")) {
        return -1; // Return if the sound file can&#39;t be loaded
    }

    // Create a sound instance and set the buffer
    sf::Sound sound;
    sound.setBuffer(buffer);
    // sound.setLoop(true); // Loop the sound for continuous effect
    // sound.play(); // Play the sound

    // Set the initial position of the sound source (in 3D space);
    sound.setPosition(0.f, 0.f, 0.f); // Position at (0, 0, 0)
    sound.setAttenuation(Attenuation);
    sound.setMinDistance(MinDistance3D);
    // sound.setPosition(0.f, 0.f, 0.f); // Position at (0, 0, 0)
    // sound.setMinDistance(100.f); // Minimum distance before the sound starts to attenuate (reduced for a more noticeable effect)
    // sound.setAttenuation(100.f); // Attenuation factor for the sound fall-off (increased for more dramatic effect)
    sound.setRelativeToListener(true);

    // Set up the listener (our "ears")
    sf::Listener::setPosition(0.f, 0.f, ListenerZ); // Position the listener further from the source
    sf::Listener::setDirection(0.f, 0.f, -1.f); // Facing towards negative Z
    // sf::Listener::setDirection(0.5f, 0.f, 0.5f);

    // Set up a simple window to visualize sound movement
    sf::RenderWindow window(sf::VideoMode(1200, 900), "SFML 3D Sound Attenuation Example");

    // To visualize, create a circle to represent the sound source
    sf::CircleShape sourceCircle(10.f);
    sourceCircle.setFillColor(sf::Color::Red);
    sourceCircle.setPosition(400.f, 300.f); // Initial position in the center of the window

    // Game loop to control the window
    while (window.isOpen()) {
        // printf("%lf %lf\n", sound.getPosition().x, sound.getPosition().y);
        // printf("%lf %lf\n", sf::Listener::getPosition().x, sf::Listener::getPosition().y);
        // printf("----------------------\n");
        sf::Event event;
        while (window.pollEvent(event)) {
            if (event.type == sf::Event::Closed)
                window.close();
        }

        // Move the sound source using arrow keys
        if (sf::Keyboard::isKeyPressed(sf::Keyboard::Right)) {
            // Only move if within right boundary
            if (sourceCircle.getPosition().x + sourceCircle.getRadius() * 2 < window.getSize().x) {
                sourceCircle.move(0.1f, 0.f);            
                sound.setPosition(sourceCircle.getPosition().x, sourceCircle.getPosition().y, 0.f);
            }
        }
        if (sf::Keyboard::isKeyPressed(sf::Keyboard::Left)) {
            // Only move if within left boundary
            if (sourceCircle.getPosition().x > 0) {
                sourceCircle.move(-0.1f, 0.f);
                sound.setPosition(sourceCircle.getPosition().x, sourceCircle.getPosition().y, 0.f);
            }
        }
        if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up)) {
            // Only move if within top boundary
            if (sourceCircle.getPosition().y > 0) {
                sourceCircle.move(0.f, -0.1f);
                sound.setPosition(sourceCircle.getPosition().x, sourceCircle.getPosition().y, 0.f);
            }
        }
        if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down)) {
            // Only move if within bottom boundary
            if (sourceCircle.getPosition().y + sourceCircle.getRadius() * 2 < window.getSize().y) {
                sourceCircle.move(0.f, 0.1f);
                sound.setPosition(sourceCircle.getPosition().x, sourceCircle.getPosition().y, 0.f);
            }
        }
        if (sf::Keyboard::isKeyPressed(sf::Keyboard::Space)) {
            sound.play();
        }

        // Clear the window and draw the sound source
        window.clear();
        window.draw(sourceCircle);
        window.display();
    }

    return 0;
}