class GameObject {
    int objectType;
    // Split logical domain into seperate components.
    PhysicsComponent *physics;
    GraphicsComponent *graphics;

    void update(Input *input) {
        physics -> update(input);
    }

    void draw(Canvas *canvas) {
        graphics -> draw(canvas);
    }
}

// Responsible for Game Object `draw`
class GraphicsComponent {
public:
    virtual void draw ( Canvas *canvas ) {};
};

// Responsible for Game Object `update`
class PhysicsComponent {

public:
    // Relevant properties
    double x, y;
    double w, h;
    Vec2d velocity;

    PhysicsComponent() {};
    // ... Other Constructors

    virtual void update(Input *input) {};
    virtual void onCollision(PhysicsComponent *otherPhysics, int objectType) {};
};