/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield 
 *
 * This library is open source and may be redistributed and/or modified under  
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 * OpenSceneGraph Public License for more details.
*/

#ifndef OSGTERRAIN_TILESYSTEM
#define OSGTERRAIN_TILESYSTEM 1

#include <osgTerrain/Export>
#include <osg/Object>
#include <osg/observer_ptr>

namespace osgTerrain {


/** TileSystem provides the mechanism for computing the position in space of tiles.*/
class OSGTERRAIN_EXPORT TileSystem : public osg::Object
{
    public:

        TileSystem();
        
        TileSystem(const TileSystem&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);

        META_Object(osgTerrain, TileSystem);

    protected:

        virtual ~TileSystem();
};

class OSGTERRAIN_EXPORT TileID : public osg::Object
{
    public:
    
        TileID();
        
        TileID(const TileID&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);

        META_Object(osgTerrain, TileID);

    protected:

        virtual ~TileID();

        osg::observer_ptr<TileSystem> _tileSystem;
        int _layer;
        int _x;
        int _y;
};

}

#endif