SFML kolizje

#include <vector>
#include <SFML/Graphics.hpp>
#include <iostream>
int pos_x,pos_y;
bool zakrent=true;
int ilosc_tab=100;
int wielekosc_pierwszej_lini=10;
int resetx=0;
bool kolizja_prawa,kolizja_lewa,kolizja_gorna,kolizja_dolna;
int main()
{

    sf::RenderWindow window(sf::VideoMode(1920, 1080, 32), "okno");
    window.setFramerateLimit(60);

//Tlo
    sf::RectangleShape tlo(sf::Vector2f(1920,1080));
    tlo.setFillColor(sf::Color::Blue);

//Linie
    sf::RectangleShape linia_gora(sf::Vector2f(1920,1));
    linia_gora.setFillColor(sf::Color::Red);

    sf::RectangleShape linia_dol(sf::Vector2f(1920,1));
    linia_dol.setFillColor(sf::Color::Red);
    linia_dol.setPosition(0,1080);

    sf::RectangleShape linia_prawo(sf::Vector2f(1,1080));
    linia_prawo.setFillColor(sf::Color::Red);
    linia_prawo.setPosition(1920,0);

    sf::RectangleShape linia_lewo(sf::Vector2f(1,1080));
    linia_lewo.setFillColor(sf::Color::Red);

//Postać
    sf::RectangleShape postac(sf::Vector2f(50,50));
    postac.setFillColor(sf::Color::Red);
    postac.setOrigin(postac.getGlobalBounds().width/2 , postac.getGlobalBounds().height/2);
    postac.setPosition(960,540);

    std::vector<sf::RectangleShape> squares(ilosc_tab, sf::RectangleShape(sf::Vector2f(20, 20)));
    sf::Vector2f startpos(400, 200);
    for (auto& square : squares)
    {

        square.setOrigin(square.getGlobalBounds().width / 2, square.getGlobalBounds().height / 2);
        square.setFillColor(sf::Color::Green);
        square.setPosition(startpos);

        resetx++;

        if(resetx==wielekosc_pierwszej_lini)
        {
         zakrent=false;
        }
        else
        {
         zakrent=true;
        }

        if(zakrent==true)
        {
          startpos.x+=30;
        }
        else
        {
            startpos.x=squares[0].getPosition().x;
            if(resetx==wielekosc_pierwszej_lini)
           {
             startpos.y+=30;
             resetx=0;
           }
        }
    }

    while (window.isOpen())
    {
        //kolizje
        if(sf::Keyboard::isKeyPressed(sf::Keyboard::W))
            {
                if(postac.getGlobalBounds().intersects(linia_gora.getGlobalBounds())||postac.getGlobalBounds().intersects(squares[i].getGlobalBounds()))
                {
                   kolizja_gorna=true;
                   std::cout<<"kolizja gorna!!"<<std::endl;
                }

                else
                {
                    kolizja_gorna=false;
                    postac.move(0,-5);
                }

            }

            if(sf::Keyboard::isKeyPressed(sf::Keyboard::S))
            {
                if(postac.getGlobalBounds().intersects(linia_dol.getGlobalBounds())||postac.getGlobalBounds().intersects(squares[i].getGlobalBounds()))
                {
                   kolizja_dolna=true;
                   std::cout<<"kolizja dolna!!"<<std::endl;
                }

                else
                {
                    kolizja_dolna=false;
                    postac.move(0,5);
                }

            }

            if(sf::Keyboard::isKeyPressed(sf::Keyboard::A))
            {
                if(postac.getGlobalBounds().intersects(linia_lewo.getGlobalBounds())||postac.getGlobalBounds().intersects(squares[i].getGlobalBounds()))
                {
                   kolizja_lewa=true;
                   std::cout<<"kolizja prawa!!"<<std::endl;
                }

                else
                {
                    kolizja_lewa=false;
                    postac.move(-5,0);
                }
            }

            if(sf::Keyboard::isKeyPressed(sf::Keyboard::D))
            {
                if(postac.getGlobalBounds().intersects(linia_prawo.getGlobalBounds())||postac.getGlobalBounds().intersects(squares[i].getGlobalBounds()))
                {
                   kolizja_prawa=true;
                   std::cout<<"kolizja lewa!!"<<std::endl;
                }

                else
                {
                    kolizja_prawa=false;
                    postac.move(5,0);
                }
            }


        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
            {
                window.close();
            }
            if (event.type == sf::Event::KeyPressed)
            {
                if (event.key.code == sf::Keyboard::Escape)
                {
                    window.close();
                }
            }
        }
        window.clear(sf::Color::Black);
        window.draw(tlo);
        for (auto& square : squares)
        {
            window.draw(square);
        }
        window.draw(linia_dol);
        window.draw(linia_gora);
        window.draw(linia_prawo);
        window.draw(linia_lewo);
        window.draw(postac);
        window.display();
    }
}