VolumeTile.h

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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2009 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 OSGVOLUME_tile
#define OSGVOLUME_tile 1

#include <osg/Group>
#include <osg/Image>

#include <osgDB/ReaderWriter>

#include <osgVolume/Layer>
#include <osgVolume/VolumeTechnique>

namespace osgVolume {

class Volume;

class OSGVOLUME_EXPORT TileID
{
    public:

        TileID();

        TileID(int in_level, int in_x, int in_y, int in_z);

        bool operator == (const TileID& rhs) const
        {
            return (level==rhs.level) && (x==rhs.x) && (y==rhs.y) && (z==rhs.z);
        }

        bool operator != (const TileID& rhs) const
        {
            return (level!=rhs.level) || (x!=rhs.x) || (y!=rhs.y) || (z!=rhs.z);
        }

        bool operator < (const TileID& rhs) const
        {
            if (level<rhs.level) return true;
            if (level>rhs.level) return false;
            if (x<rhs.x) return true;
            if (x>rhs.x) return false;
            if (y<rhs.y) return true;
            if (y>rhs.y) return false;
            return z<rhs.z;
        }

        bool valid() const { return level>=0; }

        int level;
        int x;
        int y;
        int z;
};


class OSGVOLUME_EXPORT VolumeTile : public osg::Group
{
    public:

        VolumeTile();

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

        META_Node(osgVolume, VolumeTile);

        virtual void traverse(osg::NodeVisitor& nv);

        void init();


        void setVolume(Volume* ts);

        Volume* getVolume() { return _volume; }

        const Volume* getVolume() const { return _volume; }


        void setTileID(const TileID& tileID);

        const TileID& getTileID() const { return _tileID; }


        void setLocator(Locator* locator) { _locator = locator; }
        Locator* getLocator() { return _locator.get(); }
        const Locator* getLocator() const { return _locator.get(); }


        void setLayer(Layer* layer);
        Layer* getLayer() { return _layer.get(); }
        const Layer* getLayer() const { return _layer.get(); }



        void setVolumeTechnique(VolumeTechnique* VolumeTechnique);

        VolumeTechnique* getVolumeTechnique() { return _volumeTechnique.get(); }

        const VolumeTechnique* getVolumeTechnique() const { return _volumeTechnique.get(); }


        void setDirty(bool dirty);

        bool getDirty() const { return _dirty; }


        virtual osg::BoundingSphere computeBound() const;

    protected:

        virtual ~VolumeTile();

        friend class Volume;

        Volume*                             _volume;

        bool                                _dirty;
        bool                                _hasBeenTraversal;

        TileID                              _tileID;

        osg::ref_ptr<VolumeTechnique>       _volumeTechnique;

        osg::ref_ptr<Locator>               _locator;

        osg::ref_ptr<Layer>                 _layer;
};

}

#endif