Qt4 FPS

[Eckos]

I am using Qt4 with OpenGL. And I was wonderinf if anyone has/know any tutorials on calculating the frames per second or have source code of it. Because I can't find anything on it.

[Mad Merlin]

Here's a crude example:

Code: Select all

void fps(void)
{
	static int frames = 0;
	static int lasttime = time(NULL);
	frames++;
	int tmp = time(NULL);
	if (tmp != lasttime)
	{
		lasttime = tmp;
		printf("%d fps\n", frames);
		frames = 0;
	}
}

It should be called once for every iteration of your main/rendering loop. Note that the first value it prints out will be inaccurate (that's one reason why it's crude).

The concept is quite simple, just think about it for a bit if you don't get it.