Messages

1

General / Stuttering when trying to limit fps

« on: November 19, 2018, 10:24:37 am »

Hey everyone,

I spent 3 days on this, trying every little thing I found on the internet.

At first I created game loop without any restrictions /*while(true)*/, however I decided there is no reason to let run my app at 1400 fps, just to draw 5 rectangles. So I tried manual sleep functions with different ways of computing the wait time, window method setFrameLimit, vSync but no use. I ended up with this, as I am now fed up with this whole thing.

 Clock gameClock = new Clock();
            Clock sleepClock = new Clock();
            fpsCounter.Start();
            int sleepTime = 0;
            int frameTime = 0;
            int lag = 0;
            const int MS_UPDATE = 10;

            while (window.IsOpen)
            {
                deltaTime = gameClock.Restart();    //I need this for tank movement, so yeah
                lag += deltaTime.AsMilliseconds();
                window.DispatchEvents();
                CheckForInputs();

                while(lag >= MS_UPDATE)
                {
                    scene.UpdateProjectiles(MS_UPDATE / 1000f);
                    CheckCollisions();
                    lag -= MS_UPDATE;
                }

                window.Clear(Color.White);
                renderer.RenderScene(scene, (lag / MS_UPDATE) / 1000);
                window.Display();
                fps++;
                frameTime = gameClock.ElapsedTime.AsMilliseconds();

                sleepClock.Restart();
                sleepTime += (int)(1000f / 100f - frameTime);

                if (sleepTime > 0)
                {
                  System.Threading.Thread.Sleep(sleepTime);
                }

                sleepTime -= sleepClock.ElapsedTime.AsMilliseconds();
            }
        }
 

I tried my best, but I ended up with this result *attachment* (I made point everytime I move forward),
you clearly can see when stuttering occured.

Anyone any ideas? It is still the same with any form of fps limiting.

I programming it in C# with 2.2 .NET wrapper

Thankful for any new ideas!