C++ OpenGL Game Timer

I am attempting to make a simple g开发者_如何转开发ame using C++ and OpenGL and I haven't been able to find any good tutorials on creating a simple tick or a timer system for a game i also would like to use an little external librarys as possible. Any help is appreciated. I am using Win32 and C::B IDE...MingW complier.

Have you tried:

void glutTimerFunc( unsigned int msecs, void (*func)(int value), value);

Check this pages:

http://wiki.allegro.cc/index.php?title=Timers#How_to_use_them.3F

http://www.koonsolo.com/news/dewitters-gameloop/

Maybe you can get more answers on Gamedev Stackexchange.

Take a look at boost::date_time.

You could try QueryPerformanceCounter and QueryPerformanceFrequency if you want it ultra-precise.

Edit: I think the docs are pretty sufficient, you get the count of timer ticks and the timer's frequency. But anyway, here's an example:

Not tested, but should give you the idea.

int main(int argc, char *argv[])
{
  LARGE_INTEGER freq;
  LARGE_INTEGER start;
  LARGE_INTEGER current;
  double t;

  QueryPerformanceFrequency(&freq); // initialize frequency
  QueryPerformanceCounter(&start); // initialize start time

  while (!terminated) // game main loop
  {
    QueryPerformanceCounter(&current); // get current time
    t = (end.QuadPart - start.QuadPart) / (double)freq.QuadPart; // transform to seconds

    /* do stuff here with t */
  }

  return 0;
}

You could also use any 64-bit integer type instead of LARGE_INTEGER, but this is how they intended it.