通过地址将向量的元素传递到不同的数据结构

Question

I am building a 2d game and I am storing all my enemy objects in an array. Right now I am trying to implement a quadtree . Currently I am just trying to build the quadtree and am not concerned with collisions. The code that pushes items to the quadtree is the following :

for (std::vector<Enemy>::iterator i=m_enemies.begin(); i != m_enemies.end(); ++i) {
    std::cout << &(*i) << "Address of the object" << std::endl;
    m_quad.Insert(&(*i));
}

The code for the Insert is the following :

void Quad::Insert(sf::RectangleShape* l_gameObject){
    std::cout << &l_gameObject << "dsa1" << std::endl;
    std::cout << "called insert " << m_objects.size() << std::endl;
    m_objects.push_back(l_gameObject);
    if (m_level < m_maxLevel) {
        if (m_objects.size() > 3) {
            std::cout<< "creating subregions " << m_objects.size() << std::endl;
            m_subRegions.push_back(Quad(m_x,m_y,m_width/2.f, m_height/2, m_level + 1, m_maxLevel-1));
            m_subRegions.push_back(Quad(m_x+m_width/2.f,m_y,m_width/2.f,m_height/2.f, m_level + 1, m_maxLevel-1));
            m_subRegions.push_back(Quad(m_x+m_width/2.f, m_y + m_height/2.f, m_width/2.f, m_height/2.f, m_level + 1, m_maxLevel-1));
            m_subRegions.push_back(Quad(m_x, m_y + m_height/2.f, m_width/2.f, m_height/2.f, m_level + 1, m_maxLevel-1));
            std::vector<int> temp;
            for (int i=0; i < m_objects.size(); i++){
                for (int j=0; j< m_subRegions.size(); j++) {
                    if (m_subRegions[j].Contains(m_objects[i])) {
                        m_subRegions[j].Insert(m_objects[i]);
                        temp.push_back(i);
                        break;
                    }
                }
            }
            for (int i = temp.size(); i > -1; i--){
                m_objects.erase(m_objects.begin() + temp[i]);
            }
        }
    }
}

When I print the address that I am passing to the Insert function and the one I have in the function I see that they are different. In fact the on in is always the same and the one I pass is always different as it should be. Could anyone clarify why that is the case ?

EDIT : Thanks to gsamaras for pointing out that I was printing the address of the parameter.

Followup question

When I use the methods of the object I am addressing in the first for loop I get the correct results, but when I do the same thing in the Insert function I get 0. Why is that ?

Answer 1

Inside Insert , you're printing the address of the parameter.
Outside Insert , you're printing the parameter's value.

You want

std::cout << l_gameObject << "dsa1" << std::endl;

since l_gameObject is the address you're passing in.

Answer 2

You are printing the address of the address.

Change this:

std::cout << &l_gameObject << "dsa1" << std::endl;

to this:

std::cout << l_gameObject << "dsa1" << std::endl;

in order to print the same thing as outside your of your function.