gistfile1.cpp

class SpriteSheet
{
    public:
        SpriteSheet();
        SpriteSheet(const std::string& filename);

        void defineSprite(std::string name, std::vector<sf::IntRect> frames);
        const sf::Sprite& getFrame(const std::string& name, int frame);

        sf::Texture texture;
    private:
        std::map<std::string, std::vector<sf::Sprite>> sprites;

};

SpriteSheet::SpriteSheet() {}

SpriteSheet::SpriteSheet(const std::string &filename)
    : sprites{}
{
    if (!texture.loadFromFile(filename)) {
        std::cerr << "Couldn't load " << filename << std::endl;
    }
}

void SpriteSheet::defineSprite(std::string name, std::vector<sf::IntRect> frames) {
    std::vector<sf::Sprite> namedFrames(frames.size());

    for (auto& i : frames) {
        namedFrames.push_back(sf::Sprite(texture, i));
    }

    sprites[name] = namedFrames;
}

const sf::Sprite& SpriteSheet::getFrame(const std::string &name, int frame) {
    return sprites[name][frame];
}