I was trying to create a simple game and got stuck at the beginning. The app builds correctly and when launched throws exception with a message:
Exception thrown at 0x775F9F83 (ntdll.dll) in pong.exe: 0xC0000005: Access violation writing location 0x00000004.
Visual Studio Debugger points me at the line 6 in Window.cpp file ("This is the next statement to execute when this thread returns from the current function").
Apart from that I get IntelliSense errors only:
no instance of constructor "sf::ContextSettings::ContextSettings" matches the argument list pong Window.hpp 89
no instance of constructor "sf::ContextSettings::ContextSettings" matches the argument list pong Window.hpp 106
no instance of constructor "sf::ContextSettings::ContextSettings" matches the argument list pong Window.hpp 133
no instance of constructor "sf::ContextSettings::ContextSettings" matches the argument list pong Window.hpp 151
I searched for solution here and at StackExchange and I discovered it's not advisable to declare sf::Window as global. I don't do this, but it seems simply declaring it outside a function causes problems. Still I'd really like to have this object as Window static class member when the project grows bigger.
I remember a year ago on some earlier version on SFML I was able to declare it in such way without any problems.
Problem occurs in debug mode only. Program executes just fine in Release mode.
Could you help me? I don't really know what I am doing wrong. Here are all project files at the moment.
main.cpp
#include <SFML/Graphics.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Network.hpp>
#include "App.h"
#include "Window.h"
int main()
{
App::run();
return 0;
}
App.h
class App
{
private:
static void loop();
public:
static void run();
};
App.cpp
#include <SFML/Graphics.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Network.hpp>
#include "Window.h"
#include "App.h"
void App::run()
{
Window::initialize();
loop();
}
void App::loop()
{
while (Window::window.isOpen())
{
sf::Event event;
while (Window::window.pollEvent(event))
{
if (event.type == sf::Event::Closed)
Window::window.close();
}
}
}
Window.h
class Window
{
public:
static void initialize();
static sf::Window window;
};
Window.cpp
#include <SFML/Graphics.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Network.hpp>
#include "Window.h"
sf::Window Window::window; // <--- This is the next statement to execute when this thread returns from the current function
void Window::initialize()
{
window.create(sf::VideoMode::getDesktopMode(), "Pong");
}