Dragon__WinApi/Timer.cpp at main · diduo7/Dragon__WinApi · GitHub

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#include "Timer.h"

void Timer::Init()
{
	isHardware = false;
	timeScale = 0.0f;
	timeElapsed = 0.0f;
	currTime = 0;
	lastTime = 0;
	periodFrequency = 0;

	fpsTimeElapsed = 0.0f;
	fpsFrameCount = 0;
	FPS = 0;

	isHardware = QueryPerformanceFrequency((LARGE_INTEGER*)&periodFrequency); //초당 진동수를 periodFrequency에 저장
	if (isHardware)
	{
		QueryPerformanceCounter((LARGE_INTEGER*)&lastTime); //
		timeScale = 1.0f / periodFrequency;
	}
	else
	{
		lastTime = timeGetTime();
		timeScale = 0.0f;
	}

}

void Timer::Release()
{
}

void Timer::Tick() //update 느낌
{
	if (isHardware)
	{
		QueryPerformanceCounter((LARGE_INTEGER*)&currTime);
	}
	else
	{
		currTime = timeGetTime();
	}

	timeElapsed = (currTime - lastTime) * timeScale; //업데이트 될 때까지 걸리는 시간 0.01초
	fpsTimeElapsed += timeElapsed;
	fpsFrameCount++;

	if(fpsTimeElapsed>=1.0f)
	{
		FPS = fpsFrameCount;
		fpsFrameCount = 0;
		fpsTimeElapsed = 0;

	 }
	lastTime = currTime;
}

float Timer::GetCurrTime()
{
	__int64 time;
	if (isHardware)
	{
		QueryPerformanceCounter((LARGE_INTEGER*)&currTime);
	}
	else
	{
		time = timeGetTime();
	}
	return time * timeScale;
}