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C-/C++-Quelltext

        float r = abs(3.0 - 6.0 * hue) - 1.0;
        float g = 2.0 - abs(2.0 - 6.0 * hue);
        float b = 2.0 - abs(4.0 - 6.0 * hue);

        color = sf::Color(std::min(std::max(r, 0.f), 1.f) * 255.f, std::min(std::max(g, 0.f), 1.f) * 255.f, std::min(std::max(b, 0.f), 1.f) * 255.f);

C-/C++-Quelltext

        hue += 0.5 * fTime;
        if(hue > 1.0)
            hue = 0.0;

C-/C++-Quelltext

#include <SFML/Graphics.hpp>

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

    sf::RenderTexture m_RenderTexture;
    sf::Sprite sprite;
    sf::Clock FrameClock;
    float fTime;

    m_RenderTexture.create(window.getSize().x, window.getSize().y);

    sf::CircleShape m_Circle(5);

    float hue = 0.0;

    sf::Color color;

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

            // Escape key pressed
            if ((event.type == sf::Event::KeyPressed) && (event.key.code == sf::Keyboard::Escape))
                window.close();
        }

        fTime = FrameClock.restart().asSeconds();

        hue += 0.5 * fTime;
        if(hue > 1.0)
            hue = 0.0;


        float r = abs(3.0 - 6.0 * hue) - 1.0;
        float g = 2.0 - abs(2.0 - 6.0 * hue);
        float b = 2.0 - abs(4.0 - 6.0 * hue);

        color = sf::Color(std::min(std::max(r, 0.f), 1.f) * 255.f, std::min(std::max(g, 0.f), 1.f) * 255.f, std::min(std::max(b, 0.f), 1.f) * 255.f);


        m_Circle.setPosition(sf::Mouse::getPosition(window).x, sf::Mouse::getPosition(window).y);
        m_Circle.setFillColor(color);

        m_RenderTexture.draw(m_Circle);
        m_RenderTexture.display();

        window.clear();
        sprite.setTexture(m_RenderTexture.getTexture());
        window.draw(sprite);
        window.display();
    }

    return 0;
}