/*=========================================================================

	gstate.cpp

	Author:		PKG
	Created: 
	Project:	PRLSR
	Purpose: 

	Copyright (c) 2000 Climax Development Ltd

===========================================================================*/


#include "system\global.h"
#include "system\gstate.h"

#ifndef __SYSTEM_CLICKCOUNT_H__
#include "system\clickcount.h"
#endif



/*****************************************************************************/
static CScene	*s_currentScene;
static CScene	*s_pendingScene;

int		GameState::s_timeSinceLast;
static	CClickCount	s_clickCounter;


/*****************************************************************************/
/*****************************************************************************/
/*****************************************************************************/
void GameState::initialise()
{
	s_currentScene=NULL;
	s_pendingScene=NULL;
}


/*****************************************************************************/
/*****************************************************************************/
/*****************************************************************************/
void GameState::think()
{
	updateTimer();

	if( s_pendingScene )
		{
		if( !s_currentScene)
			{
			if( s_currentScene )
				{
				s_currentScene->shutdown();
				}

			s_currentScene=s_pendingScene;
			s_pendingScene=NULL;

			s_currentScene->init();
			}
		}
	ASSERT(s_currentScene);
	s_currentScene->think(getFramesSinceLast());
}


/*****************************************************************************/
/*****************************************************************************/
/*****************************************************************************/
void GameState::render()
{
	ASSERT(s_currentScene);
	s_currentScene->render();
}


/*****************************************************************************/
/*****************************************************************************/
/*****************************************************************************/
void GameState::setNextScene( CScene *_nextScene )
{
	ASSERT(!s_pendingScene);

	s_pendingScene=_nextScene;
}



/*****************************************************************************/
CScene * GameState::getCurrentScene()
{
	return s_currentScene;
}

/*****************************************************************************/
CScene * GameState::getPendingScene()
{
	return s_pendingScene;
}

/*****************************************************************************/
static int s_timeSpeed = ONE;
void GameState::updateTimer()
{
	s_timeSinceLast = (s_clickCounter.timeSinceLast() * s_timeSpeed) >> 12;
	
	if (s_timeSinceLast > 4 * 4096)
	{
		s_timeSinceLast = 4 * 4096;
		SYSTEM_DBGMSG("updateTimer loosing frames!");		
	}
}


/*===========================================================================
 end */