bool limitFpsTo(int rate){
static float last = GetTickCount() * 0.001f;
static float elapsed = 0.0f;

float currect = GetTickCount() * 0.001f;
float delta = currect – last;
float FPS = 1.0f/rate;

elapsed+=delta;
last=currect;

if (elapsed>FPS)
{
elapsed -=FPS;
return true;
}
return false;
}

If you place the buffered keyOperations() function introduced in Tutorial 3 inside the if(limitFpsTo) in the display() function the speed should be fixed.

i have prob. with this tut. I have lighting too and when try fog everything drawn becomes black. I can’t understand why…

Do u know what problem might be?

Depending on the speed of your machine, you will always have to change this. To make it constant on every machine, you need to use some time-based techniques. Such as incrementing angle depending on how much time has passed since the last frame.

Thanks,
Swiftless

btw, I think the fourth value in your fog color is the alpha value, obviously it will only make a change if you have blending enabled. Could be interesting to see if it blends with your glClearColor aye?

Cheers,
Swiftless