ogrepaginglandscapetilemanager.cpp

使用stl技术,(还没看,是听说的)

/***************************************************************************
	OgrePagingLandScapeTileManager.cpp  -  description
	-------------------
	begin                : Mon Jun 16 2003
	copyright            : (C) 2003 by Jose A. Milan
	email                : [e-mail]
***************************************************************************/

/***************************************************************************
*                                                                         *
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU Lesser General Public License as        *
*   published by the Free Software Foundation; either version 2 of the    *
*   License, or (at your option) any later version.                       *
*                                                                         *
***************************************************************************/


#include "OgreVector3.h"
#include "OgreColourValue.h"

#include "OgreMovableObject.h"
#include "OgreAxisAlignedBox.h"

#include "OgreCamera.h"


#include "OgrePagingLandScapeOptions.h"
#include "OgrePagingLandScapeCamera.h"
#include "OgrePagingLandScapeTileManager.h"
#include "OgrePagingLandScapeTile.h"

namespace Ogre
{

//-----------------------------------------------------------------------
template<> PagingLandScapeTileManager* Singleton<PagingLandScapeTileManager>::ms_Singleton = 0;
PagingLandScapeTileManager* PagingLandScapeTileManager::getSingletonPtr(void)
{
	return ms_Singleton;
}
PagingLandScapeTileManager& PagingLandScapeTileManager::getSingleton(void)
{  
	assert( ms_Singleton );  return ( *ms_Singleton );  
}

//-----------------------------------------------------------------------
PagingLandScapeTileManager::PagingLandScapeTileManager( )
{	
	mNumTiles = 0;
	// Add the requested initial number
	_addBatch(PagingLandScapeOptions::getSingleton().num_tiles);
}
//-----------------------------------------------------------------------
PagingLandScapeTileManager::~PagingLandScapeTileManager( )
{
    PagingLandScapeTileRow::iterator iend  = mTiles.end();
    for (PagingLandScapeTileRow::iterator i = mTiles.begin(); i != iend; ++i)
    {  
        delete *i;
        *i = 0;
    }
	// destroy de renderables
	mTiles.clear();

}

//-----------------------------------------------------------------------
PagingLandScapeTile *PagingLandScapeTileManager::getTile( )
{
	if ( mQueue.getSize() == 0 )
	{
		// We don磘 have more renderables, so we are going to add more
		_addBatch(PagingLandScapeOptions::getSingleton().num_tiles_increment);
		// Increment the next batch by a 10%
		PagingLandScapeOptions::getSingleton().num_tiles_increment += uint (PagingLandScapeOptions::getSingleton().num_tiles_increment * 0.1f);
	}
	return mQueue.pop( );
}

//-----------------------------------------------------------------------
void PagingLandScapeTileManager::freeTile( PagingLandScapeTile *tile )
{
	mQueue.push( tile );
}

//-----------------------------------------------------------------------
uint PagingLandScapeTileManager::numTiles( void ) const
{
	return mNumTiles;
}

//-----------------------------------------------------------------------
int PagingLandScapeTileManager::numFree( ) const
{
	return mQueue.getSize( );
}

//-----------------------------------------------------------------------
void PagingLandScapeTileManager::_addBatch(const uint num)
{
	mNumTiles += num;
//    mTiles.reserve (mNumTiles);
//    mTiles.resize (mNumTiles);
	for ( uint i = 0; i < num; i++ )
	{
		PagingLandScapeTile* tile = new PagingLandScapeTile( );
		mTiles.push_back( tile );
		mQueue.push( tile );
	}
}

} //namespace