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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;
};
/** VolumeTile provides a framework for loosely coupling 3d image data with rendering algorithms.
* This allows TerrainTechnique's to be plugged in at runtime.*/
class OSGVOLUME_EXPORT VolumeTile : public osg::Group
{
public:
VolumeTile();
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
VolumeTile(const VolumeTile&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
META_Node(osgVolume, VolumeTile);
virtual void traverse(osg::NodeVisitor& nv);
/** Call init on any attached TerrainTechnique.*/
void init();
/** Set the Volume that this Volume tile is a member of.*/
void setVolume(Volume* ts);
/** Get the Volume that this Volume tile is a member of.*/
Volume* getVolume() { return _volume; }
/** Get the const Volume that this Volume tile is a member of.*/
const Volume* getVolume() const { return _volume; }
/** Set the TileID (layer, x,y,z) of the VolumeTile.
* The TileID is used so it can be located by its neighbours
* via the enclosing Volume node that manages a map of TileID to VolumeTiles.*/
void setTileID(const TileID& tileID);
/** Get the TileID (layer, x,y,z) of the VolumeTile.*/
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(); }
/** Set the VolumeTechnique that will be used to render this tile. */
void setVolumeTechnique(VolumeTechnique* VolumeTechnique);
/** Get the VolumeTechnique that will be used to render this tile. */
VolumeTechnique* getVolumeTechnique() { return _volumeTechnique.get(); }
/** Get the const VolumeTechnique that will be used to render this tile. */
const VolumeTechnique* getVolumeTechnique() const { return _volumeTechnique.get(); }
/** Set the dirty flag on/off.*/
void setDirty(bool dirty);
/** return true if the tile is dirty and needs to be updated,*/
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