mytimer.cpp

这是一个台球游戏的源代码

#include "MyTimer.h"

CMyTimer::CMyTimer()
{
	QueryPerformanceFrequency( &m_Frequency );
	QueryPerformanceCounter( &m_Counter );
	m_bPaused=true;
}

float CMyTimer::GetElapsedTime(void)
{
	if (m_bPaused) 
		return 0.0;
	else 
	{
		LARGE_INTEGER itmp;
		QueryPerformanceCounter(&itmp);
		return (float)(itmp.QuadPart-m_Counter.QuadPart)/(float)m_Frequency.QuadPart;
	}
}

void CMyTimer::Update(void)
{
	QueryPerformanceCounter( &m_Counter );
}

void CMyTimer::Pause(void)
{
	m_bPaused=true;
}

void CMyTimer::Resume(void)
{
	m_bPaused=false;
	QueryPerformanceCounter( &m_Counter );
}