Timer.cpp

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#include <blort/Tracker/Timer.h>

// ***********************************************************************************

using namespace Tracking;

Timer::Timer(void) {
#ifdef WIN32
        QueryPerformanceFrequency((LARGE_INTEGER*) &m_Frequency);
        QueryPerformanceCounter((LARGE_INTEGER*)(&m_StartTicks));
        m_EndTicks = m_StartTicks;
#else
        clock_gettime(CLOCK_REALTIME, &AppStart);
        clock_gettime(CLOCK_REALTIME, &old);
#endif
        m_fAppTime = 0.0;
}

Timer::~Timer(void) {
}

void Timer::Reset() {
#ifdef WIN32
        QueryPerformanceFrequency((LARGE_INTEGER*) &m_Frequency);
        QueryPerformanceCounter((LARGE_INTEGER*)(&m_StartTicks));
        m_EndTicks = m_StartTicks;
#else
        clock_gettime(CLOCK_REALTIME, &AppStart);
        clock_gettime(CLOCK_REALTIME, &old);
#endif
        m_fAppTime = 0.0;
}

double Timer::Update() {
#ifdef WIN32
        QueryPerformanceCounter((LARGE_INTEGER*)(&m_EndTicks));
        fNow = (double)(m_EndTicks - m_StartTicks) / m_Frequency;
        m_fTime = fNow - m_fAppTime;
        m_fAppTime = fNow;
#else
        clock_gettime(CLOCK_REALTIME, &act);
        m_fTime = (act.tv_sec - old.tv_sec) + (act.tv_nsec - old.tv_nsec) / 1e9;
        old = act;              
        m_fAppTime += m_fTime;
#endif
        return m_fTime;
}