main.cpp

#include "SFML/Graphics.hpp"
#include "SFML/Window.hpp"

struct Scene
{
  sf::RectangleShape body;
  sf::CircleShape tire[2];
  sf::ConvexShape roof;
};

/*
+--------------------------->
|           __________                 proporcje
|          /         |     ^              0.3
|    +----/----------+     |
|    |               |     |  carHeight   0.5
|    +---------------+     |
|       O        O         V              0.2
|    <--------------->
|        carLength
|
V
*/

Scene createScene()
{
  Scene s;

  int xpos = 200;
  int ypos = 100;

  int carLength = 150;
  int carHeight = 50;

  float rP = 0.3;
  float bP = 0.5;
  float tP = 0.2;

  s.body.setSize( sf::Vector2f(carLength, bP*carHeight));
  s.body.setPosition({static_cast<float>(xpos), ypos+rP*carHeight});

  s.tire[0].setRadius(tP/2 * carHeight);
  s.tire[1].setRadius(tP/2 * carHeight);

  s.tire[0].setPosition({static_cast<float>(xpos + 0.2*carLength), ypos + (rP+bP)*carHeight });
  s.tire[1].setPosition({static_cast<float>(xpos + 0.7*carLength), ypos + (rP+bP)*carHeight});

  s.roof.setPointCount(4);
  s.roof.setPoint(0, sf::Vector2f(xpos+0.4*carLength, ypos + rP*carHeight));
  s.roof.setPoint(1, sf::Vector2f(xpos+0.5*carLength, ypos ));
  s.roof.setPoint(2, sf::Vector2f(xpos+carLength, ypos ));
  s.roof.setPoint(3, sf::Vector2f(xpos+carLength, ypos + rP*carHeight));


  return s;
}

void drawScene(sf::RenderWindow & win, const Scene & scene)
{
  win.draw(scene.body);
  win.draw(scene.tire[0]);
  win.draw(scene.tire[1]);
  win.draw(scene.roof);
}

int main() {
  sf::RenderWindow window(sf::VideoMode(sf::Vector2u(200, 200)), "SFML works!");
  sf::CircleShape shape(100.f);
  shape.setFillColor(sf::Color::Green);

  while (window.isOpen()) {
    sf::Event event;
    while (window.pollEvent(event)) {
      if (event.type == sf::Event::Closed) {
        window.close();
      }
    }
    window.clear();
    window.draw(shape);
    window.display();
  }
  return 0;
}