void FPS()
{
static float fps = 0.0f;
static float previousTime = 0.0f;
static char strFPS[20] = {0};
float currentTime = (GetTickCount() * 0.001f);
++fps;
if( currentTime - previousTime > 1.0f )
{
previousTime = currentTime;
sprintf(strFPS, "FPS: %d", int(fps));
std::cout<<strFPS<<std::endl;
fps = 0.0f;
}
}
calculating Framesper seconds
Author
I made a code for calculating frames per second(fps) but I know its not very precise.
Can you help he improve it, or help me create a better one.
here is the code :
if you want more acc, use a high performance time.
http://frank.mtsu.edu/~csjudy/directX/HighPerformanceTimer.html
http://msdn.microsoft.com/en-us/library/ms644900(VS.85).aspx
I believe the GetTickCount has a acc of 10 ms, which is very bad if your doing anything really times sensitive.
Good Luck!
-ddn
http://frank.mtsu.edu/~csjudy/directX/HighPerformanceTimer.html
http://msdn.microsoft.com/en-us/library/ms644900(VS.85).aspx
I believe the GetTickCount has a acc of 10 ms, which is very bad if your doing anything really times sensitive.
Good Luck!
-ddn
If you want you can use fraps to display the frames per second of your game. Just open up fraps and then run your game and it will display the FPS in your game screen.
Hi
This is not how I've usually seen the FPS calculated in a game. I'm used to (pseudocode)
and sometimes if you want to smooth the values you can use a moving average with a queue of size N
(you define the size of the queue: 1, 10, 20, 60, whatever)
This is not how I've usually seen the FPS calculated in a game. I'm used to (pseudocode)
begin = getTime()// frameend = getTime()fps = 1 / (end-begin)and sometimes if you want to smooth the values you can use a moving average with a queue of size N
begin = getTime()// frameend = getTime()queue.push(end-begin)fps = queue.size() / queue.sum()(you define the size of the queue: 1, 10, 20, 60, whatever)
I just call this every frame. dt is delta time in seconds, but could be an int with milliseconds or whatever you're using.
#define FPS_FRAMES 8#define FPS_FRAMES_MASK (FPS_FRAMES - 1)static void DrawFps(double dt) { static double prevTimes[FPS_FRAMES]; static unsigned index; prevTimes[index & FPS_FRAMES_MASK] = dt; ++index; if (index > FPS_FRAMES) { double *i, total = 0; for (i = prevTimes; i < prevTimes + FPS_FRAMES; ++i) { total += *i; }#if 1 /* milliseconds per frame */ total /= FPS_FRAMES; total *= 1000;#else /* frames per second */ total = FPS_FRAMES / total;#endif /* draw */ }}This topic is closed to new replies.
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