#include "stdafx.h"
#include "SGameSceneLifeActor.h"
#include "SGameSceneManager.h"

using namespace rp;

SGameSceneLifeActor::SGameSceneLifeActor(
	  DWORD lifeTime
	, DWORD fadeInTime
	, DWORD fadeOutTime )
	: SGameSceneActor()
	, mBeginTime	( 0 )
	, mLifeTime		( lifeTime )
	, mFadeInTime	( fadeInTime )
	, mFadeOutTime	( fadeOutTime )
{
}

SGameSceneLifeActor::~SGameSceneLifeActor()
{
}

void SGameSceneLifeActor::onActivate()
{
	mBeginTime = 0;
}

void SGameSceneLifeActor::update( SGameScene* scene )
{
	DWORD CurTime = scene->getSceneManager().timer().getTime();

	if( mBeginTime == 0 )
		mBeginTime = CurTime;

	DWORD DiffTime = CurTime - mBeginTime;

	if( DiffTime >= mLifeTime )
	{
		scene->activate( false );
		return;
	}

	float Visibility = 1.f;

	if( DiffTime < mFadeInTime )
	{
		Visibility = (float)DiffTime / mFadeInTime;
	}
	else if( DiffTime >= mLifeTime - mFadeOutTime )
	{
		Visibility = (float)( mLifeTime - DiffTime ) / mFadeOutTime;
	}

	scene->setLocalVisibility( Visibility );
}