Messages

1

General / Re: SFML and Box2d

« on: November 22, 2020, 07:48:02 am »

Thank You .. that was really helpful.

2

General / SFML and Box2d

« on: November 20, 2020, 06:12:19 pm »

Hello,
so I'm trying to use SFML with box2d .. I created a GameObject class

class GameObject
{
public:
        Drawable* drawable;
        Shape* shape;
        b2Body* body;
        void setColor(Color color);
        void update();
        virtual void draw(RenderWindow* window) = 0;
};

and a box class

class Box: public GameObject
{
public:
        RectangleShape rectangle;
        Box(b2World* world, b2Vec2 position, b2Vec2 size, b2BodyType type, float density = 1, float friction = 0, uint16 category = 1, uint16 mask= 0xFFFF);
        void draw(RenderWindow* window)override;
};

I have a

vector<GameObject*> objects;

and every frame I update and draw the boxes

now the problem is this

if (Keyboard::isKeyPressed(Keyboard::Space))
{
         objects.push_back(&Box(&world, b2Vec2(0.0f, 4.0f), b2Vec2(4.0f, 4.0f), b2BodyType::b2_dynamicBody, 1, 0, 2));
}

when I try to draw after I've pressed space the app crashes

here is the draw function

void Box::draw(RenderWindow* window)
{
    window->draw(rectangle);
}
 

any Idea what might be the problem here