sfml draw from another class - c++

Question

I am trying to make my first pong game in c++ with sfml but I have some problems
when I try to call the window.draw() function I think my code will explain the most.
This is my Game.h
#pragma once
#include <SFML/Graphics.hpp>
class Game
{
public:
Game();
void run();
private:
void processEvents();
void update();
void render();
sf::RenderWindow mWindow;
};
My game.cpp
#pragma once
#include "Game.h"
#include "Paddle.h"
Game::Game()
: mWindow(sf::VideoMode(640,480), "Pong")
{
}
void Game::run()
{
while (mWindow.isOpen())
{
processEvents();
update();
render();
}
}
void Game::processEvents()
{
sf::Event event;
while(mWindow.pollEvent(event))
{
if(event.type == sf::Event::Closed)
mWindow.close();
}
}
void Game::render()
{
mWindow.clear();
mWindow.draw(Paddle::player1);
mWindow.display();
}
void Game::update()
{
}
my Paddle.h and paddle.cpp
#pragma once
#include <SFML/Graphics.hpp>
class Paddle
{
public:
Paddle(int width, int height);
sf::RectangleShape player1(sf::Vector2f(int width,int height));
sf::RectangleShape player2(sf::Vector2f(int width,int height));
private:
};
My paddle.h
#include "Paddle.h"
Paddle::Paddle(int width,int height)
{
}
My main.cpp
#include "Game.h"
#include "Paddle.h"
int main()
{
Game game;
Paddle player1(10,60);
Paddle player2(10,60);
game.run();
}
That was all my code.
The problem is that I don't know how to draw the paddles in my Game.cpp
I think I should use some sort of pointers or reference-argument.
When I do it like this:
void Game::render()
{
mWindow.clear();
mWindow.draw(Paddle::player1);
mWindow.display();
}
I get an error. How do I solve this?

Answer 1

You need something like
class Game
{
public:
Game(Paddle & p1, Paddle & p2);
...
private:
...
Paddle & mP1;
Paddle & mP2;
};
Game::Game(Paddle & p1, Paddle & p2)
: mWindow(sf::VideoMode(640,480), "Pong"),
mP1(p1), mP2(p2)
{
}
void Game::render()
{
mWindow.clear();
mWindow.draw(mP1);
mWindow.display();
}
int main()
{
Paddle player1(10,60);
Paddle player2(10,60);
Game game(player1, player1);
game.run();
}