#include "StdAfx.h"
#include "GrpRatioInstance.h"
#include "../eterBase/Timer.h"

CGraphicRatioInstance::CGraphicRatioInstance()
{
	m_baseTime = 0;
	m_blendTime = 0;
}

CGraphicRatioInstance::~CGraphicRatioInstance()
{
}

void CGraphicRatioInstance::Clear()
{
	m_curRatio = 0.0f;
	m_srcRatio = 0.0f;
	m_dstRatio = 0.0f;

	m_baseTime = 0;
	m_blendTime = 0;
}

void CGraphicRatioInstance::SetRatioReference(const float& c_rRatio)
{
	m_curRatio = c_rRatio;	
	m_srcRatio = m_curRatio;
	m_dstRatio = m_curRatio;
}

void CGraphicRatioInstance::BlendRatioReference(DWORD blendTime, const float& c_rDstRatio)
{
	m_baseTime = GetTime();
	m_blendTime = blendTime;

	m_srcRatio = m_curRatio;
	m_dstRatio = c_rDstRatio;
}

void CGraphicRatioInstance::Update()
{
	DWORD curTime = GetTime();
	DWORD elapsedTime = curTime - m_baseTime;

	if (elapsedTime < m_blendTime)
	{
		float diff = m_dstRatio - m_srcRatio;
		float rate = elapsedTime / float(m_blendTime);
		m_curRatio = diff * rate + m_srcRatio;	
	}
	else
	{
		m_curRatio = m_dstRatio;
	}
}

DWORD CGraphicRatioInstance::GetTime()
{
	return CTimer::Instance().GetCurrentMillisecond();
}

const float& CGraphicRatioInstance::GetCurrentRatioReference() const
{
	return m_curRatio;
}