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problem using QueryPerformanceCounter, my frame time is always zero

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I'm trying to use QueryPerformanceCounter to calculate the frame time each frame. but I keep getting zero as the result. Under Vista with a Atlon64 X2


// When I create the timer I get the frequency and store the start time in time1
QueryPerformanceFrequency( &freq );
QueryPerformanceCounter( &time1 );

// each frame I get a new count and calculate the time passed as a double
QueryPerformanceCounter( &time2 );

double delta = (time2.QuadPart - time1.QuadPart) / freq.QuadPart;

time1 = time2;
// yet delta always equals zero

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You are doing an integer division, and it will always be zero if (time2.QuadPart - time1.QuadPart) is less than freq.QuadPart.
Try using (double)freq.QuadPart.

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