syncing a program with the system clock

Try the QueryPerformanceCounter() function.

Im looking for more of an article describing the concept than any specific function.

Thanks, thats perfect.

Btw, on Windows with QueryPerformance, is there a way to avoid the timing to "block" during a very short period (this often happens when the system swaps during maybe 1/10 of sec). I sometimes have jerky motion and I wanted to know if you have the same problems. I update the timer once at the beginning of the main loop and stores the result in float format. Then I use the delta_time between two frames to update the velocity, position,...

[edited by - bucheron on October 12, 2003 4:44:01 AM]

Have you tried using an average for your dtime? It smoothes out most small jerks.

In pseudocode

delta_time = CurrentTime - Previoustime;

smooth_time = smooth_time*20 + delta_time;
smooth_time = smooth_time / 21;

UpdatePhysics(smooth_time);


Thx Juuso, I will give it a try