Control Frame Rates in SFML

Sarbast Muhammad · 2014-06-15T03:09:48

Hi I'm at the beginning of learning SFML , i wrote a program to show the character moving around but it moves too fast i want to control its speed and calculate frame rates per second but i have no idea how to do that here is my code #ifdef SFML_STATIC #pragma comment(lib, "glew.lib") #pragma comment(lib, "freetype.lib") #pragma comment(lib, "jpeg.lib") #pragma comment(lib, "opengl32.lib") #pragma comment(lib, "winmm.lib") #pragma comment(lib, "gdi32.lib") #endif // SFML_STATIC #include <SFML/Graphics.hpp> #include <iostream> #include <string> const int Window_Width = 800; const int Window_Height = 600; const std::string Window_Name = "My First SFML Game"; int main() { sf::RenderWindow window(sf::VideoMode(Window_Width, Window_Height), Window_Name, sf::Style::Close); window.setPosition(sf::Vector2i(250, 50)); // change position of the window window.setKeyRepeatEnabled(false); enum Dirction{ Down, Left, Right, Up }; sf::Vector2i source(1, 0); sf::Texture pTexture; sf::Sprite sPlayer; if (!pTexture.loadFromFile("Player.png")){ std::cout << "Error loading the Texture" << std::endl; return -1; } sPlayer.setTexture(pTexture); //Sprite sf::Event MyEvent; while (window.isOpen()) { while (window.pollEvent(MyEvent)) { switch (MyEvent.type) { case sf::Event::Closed: window.close(); break; } } if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down)){ source.y = Down; sPlayer.move(0,1); } else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Left)){ source.y = Left; sPlayer.move(-1, 0); } else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Right)){ source.y = Right; sPlayer.move(1, 0); } else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up)){ source.y = Up; sPlayer.move(0, -1); } source.x++; if (source.x * 32 >= pTexture.getSize().x) source.x = 0; window.clear(); sPlayer.setTextureRect(sf::IntRect(source.x * 32, source.y*32, 32, 32)); window.draw(sPlayer); window.display(); } return EXIT_SUCCESS; } Thanks

For Beginners

Started by Sarkurd June 12, 2014 02:56 PM

10 comments, last by frob 10 years, 7 months ago

BeerNutts

4,410

June 15, 2014 01:01 AM

...
Time is tricky on computers. It does not flow regularly, nor does it always move forward. Always validate it.

That's a great post Frob. I think it's something that might be worth a short article, or maybe just a separate post.

Either way, thanks. I always learn new things on this site, game related or not.

My Gamedev Journal: 2D Game Making, the Easy Way

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frob

46,319

June 15, 2014 03:09 AM

People DO write about it.

There are occasional writeups of time related bugs. I wrote one before several years ago. Our game server would crash around 10:30A every Thursday. It took a bunch of hunting down. Windows has a normally helpful service that automatically updates the system time against Internet time servers, and it normally synchronizes once per week. After some logging, we discovered right before the crash the machine log jumped backwards by several seconds, which clued us in to the problem.

There is a flurry of articles and reminders about every six months (when DST turns on and off) and again every four years, right around the end of February.

Control Frame Rates in SFML

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Control Frame Rates in SFML

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