[ODE] Timer?

[David McClurg]

on win32, using timeGetTime() from the winmm.lib is the most common solution.  the best solution for win32 is QueryPerformanceCounter().  look at the BZFLAG sources.  it has good solutions for all platforms.

http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/bzflag/bzflag/src/platform/WinPlatformFactory.cxx?rev=HEAD&content-type=text/vnd.viewcvs-markup
double					WinPlatformFactory::getClock() const
{
	if (qpcFrequency != 0.0) {
		LARGE_INTEGER now;
		QueryPerformanceCounter(&now);
		return qpcFrequency * (double)(now.QuadPart - qpcZero.QuadPart);
	}
	else {
		unsigned int now = (unsigned int)timeGetTime();
		return 1.0e-3 * (now - clockZero);
	}
}

-----Original Message-----
From: Amund Børsand [mailto:amund@c2i.net]
Sent: Tuesday, 11 February 2003 1:37 AM
To: ODE@q12.org
Subject: [ODE] Timer?



Does anyone know a high (enough) resolution timer in C? I am using ODE
with the MingW-compiler, and I'm trying to make it real-time by
inserting the actual time from the last frame to the current into dWorldStep(). 

The function I'm currently using, clock() from time.h, claims to have
1000 CLOCKS_PER_SEC, but every now and then my t0-t (t0 being the
previous clock() and t being the current) function returns 0. Not just
every now and then, actually, but probably five times per second, when
I'm running the simulation at about 30-40 fps I guess. Is there some
other counter that is more accurate?



-- 
Amund Børsand <amund@c2i.net>


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