clock.h

#pragma once
 
#include <chrono>
namespace Aire {
    class Clock {
    private:
        using _Clock = std::chrono::steady_clock;
 
        using Secondsf = std::chrono::duration<float, std::ratio<1>>;
 
        //Last recorded point in time. Used to calculate animation delta.
        _Clock::time_point time;
        Secondsf deltaT;
        double timeSinceStart;
    public:
        Clock() : time(_Clock::now()), deltaT(0.0f), timeSinceStart(0.0) {
        }
 
        void reset() {
            time = _Clock::now();
            deltaT = Secondsf(0.0f);
            timeSinceStart = 0.0;
        }
 
        void update() {
            const auto now = _Clock::now();
            Secondsf delta = std::chrono::duration_cast<Secondsf>(now - time);
            time = now;
            deltaT = delta;
            timeSinceStart+=double(delta.count());
        }
 
        double t() const {
            return timeSinceStart;
        }
 
        float dt() const {
            return deltaT.count();
        }
    };
}