cube-game-plus-plus/engine/Clock.cpp

#include "Clock.h"
#include <iostream>

Clock::Clock()
{
    for(int i = 0; i < SIZE; i++)
    {
        time[i] = 0;
    }
}

Clock::Clock(const Clock& orig)
{
}

Clock::~Clock()
{
}

void Clock::update()
{
    uint64_t t = glfwGetTimerValue();
    time[index] = t - oldTime;
    oldTime = t;
    
    sum += time[index];
    index = (index + 1) & (SIZE - 1);
    sum -= time[index];
}

double Clock::getUpdatesPerSecond() const
{
    return (1000000000.0 * (SIZE - 1)) / sum;
}

uint64_t Clock::getCurrentTime() const
{
    return time[(index - 1) & (SIZE - 1)];
}