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I want to create an array that will contain all the sprites, text and shapes that will be drawn onto the window and my question is how can I make this array both sf::Drawable and sf::Transformable?

Trotom
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  • Possible duplicate: http://stackoverflow.com/questions/17910297/inheriting-from-transformable-and-drawable-in-sfml?rq=1 – Greg M May 01 '16 at 12:30
  • While not a solution for your coding problem, you may want to take a look at Entity systems (EntityX for example) . Those solve the problems you get when you use inheritance for this problems. – nvoigt May 01 '16 at 16:44

1 Answers1

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You would need to create a class inheriting both Drawable and Transformable. Then you would be able to create an array of that class.

class Obj : public sf::Drawable, public sf::Transformable
{
    // class code
}

// somewhere in code...
std::array<Obj, ARRAY_SIZE> arr;

Make sure you correctly implement Drawable and Transformable.

Here is a link to the official documentation.

Transformable & Drawable

One way to implement these classes would be something along the lines of:

class Obj : public sf::Drawable, public sf::Transformable
{
    public:

    sf::Sprite sprite;
    sf::Texture texture;

    // implement sf::Drawable
    virtual void draw(sf::RenderTarget& target, sf::RenderStates states) const
    {
        target.draw(sprite, states); // draw sprite
    }

    // implement sf::Transformable
    virtual void SetPosition(const MyVector& v) const
    {
        sprite.setPosition(v.x(), v.y());
    }
}

And then in your code you can directly draw and transform the class.

// somewhere in code
// arr = std::array<Obj, ARRAY_SIZE>
for (auto s : arr) {
    window.draw(s);
}
Greg M
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