68 lines
1.5 KiB
C++
68 lines
1.5 KiB
C++
//
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// Created by Иван Ильин on 11.01.2021.
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//
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#include "Time.h"
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#include "../Consts.h"
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using namespace std::chrono;
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Time* Time::_instance = nullptr;
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void Time::init() {
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_instance = new Time();
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}
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double Time::time() {
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if(!_instance)
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return 0;
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return _instance->_time;
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}
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double Time::deltaTime() {
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if(!_instance)
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return 0;
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return _instance->_deltaTime;
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}
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void Time::update() {
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if(!_instance)
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return;
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high_resolution_clock::time_point t = high_resolution_clock::now();
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_instance->_deltaTime = duration<double>(t - _instance->_last).count();
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_instance->_time = duration<double>(t - _instance->_start).count();
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// in case when fps < 10 it is useful to decrease _deltaTime (to avoid collision problems)
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if(_instance->_deltaTime > Consts::LARGEST_TIME_STEP)
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_instance->_deltaTime = Consts::LARGEST_TIME_STEP;
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_instance->_last = t;
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if(_instance->_deltaTime > 10000)
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return;
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_instance->_fpsCounter++;
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if (t - _instance->_fpsStart > _instance->_fpsCountTime) {
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_instance->_lastFps = _instance->_fpsCounter / duration<double>(t - _instance->_fpsStart).count();
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_instance->_fpsCounter = 0;
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_instance->_fpsStart = t;
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}
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}
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int Time::fps() {
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if(!_instance)
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return 0;
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// Cast is faster than floor and has the same behavior for positive numbers
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return static_cast<int>(_instance->_lastFps);
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}
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void Time::free() {
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Time* t = _instance;
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delete _instance;
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_instance = nullptr;
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}
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