158 lines
4.6 KiB
C++
158 lines
4.6 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2009 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSGVOLUME_tile
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#define OSGVOLUME_tile 1
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#include <osg/Group>
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#include <osg/Image>
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#include <osgDB/ReaderWriter>
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#include <osgVolume/Layer>
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#include <osgVolume/VolumeTechnique>
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namespace osgVolume {
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class Volume;
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class OSGVOLUME_EXPORT TileID
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{
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public:
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TileID();
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TileID(int in_level, int in_x, int in_y, int in_z);
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bool operator == (const TileID& rhs) const
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{
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return (level==rhs.level) && (x==rhs.x) && (y==rhs.y) && (z==rhs.z);
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}
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bool operator != (const TileID& rhs) const
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{
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return (level!=rhs.level) || (x!=rhs.x) || (y!=rhs.y) || (z!=rhs.z);
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}
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bool operator < (const TileID& rhs) const
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{
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if (level<rhs.level) return true;
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if (level>rhs.level) return false;
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if (x<rhs.x) return true;
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if (x>rhs.x) return false;
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if (y<rhs.y) return true;
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if (y>rhs.y) return false;
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return z<rhs.z;
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}
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bool valid() const { return level>=0; }
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int level;
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int x;
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int y;
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int z;
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};
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/** VolumeTile provides a framework for loosely coupling 3d image data with rendering algorithms.
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* This allows TerrainTechnique's to be plugged in at runtime.*/
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class OSGVOLUME_EXPORT VolumeTile : public osg::Group
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{
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public:
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VolumeTile();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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VolumeTile(const VolumeTile&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
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META_Node(osgVolume, VolumeTile);
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virtual void traverse(osg::NodeVisitor& nv);
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/** Call init on any attached TerrainTechnique.*/
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void init();
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/** Set the Volume that this Volume tile is a member of.*/
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void setVolume(Volume* ts);
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/** Get the Volume that this Volume tile is a member of.*/
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Volume* getVolume() { return _volume; }
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/** Get the const Volume that this Volume tile is a member of.*/
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const Volume* getVolume() const { return _volume; }
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/** Set the TileID (layer, x,y,z) of the VolumeTile.
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* The TileID is used so it can be located by its neighbours
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* via the enclosing Volume node that manages a map of TileID to VolumeTiles.*/
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void setTileID(const TileID& tileID);
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/** Get the TileID (layer, x,y,z) of the VolumeTile.*/
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const TileID& getTileID() const { return _tileID; }
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void setLocator(Locator* locator) { _locator = locator; }
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Locator* getLocator() { return _locator.get(); }
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const Locator* getLocator() const { return _locator.get(); }
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void setLayer(Layer* layer);
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Layer* getLayer() { return _layer.get(); }
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const Layer* getLayer() const { return _layer.get(); }
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/** Set the VolumeTechnique that will be used to render this tile. */
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void setVolumeTechnique(VolumeTechnique* VolumeTechnique);
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/** Get the VolumeTechnique that will be used to render this tile. */
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VolumeTechnique* getVolumeTechnique() { return _volumeTechnique.get(); }
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/** Get the const VolumeTechnique that will be used to render this tile. */
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const VolumeTechnique* getVolumeTechnique() const { return _volumeTechnique.get(); }
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/** Set the dirty flag on/off.*/
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void setDirty(bool dirty);
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/** return true if the tile is dirty and needs to be updated,*/
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bool getDirty() const { return _dirty; }
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virtual osg::BoundingSphere computeBound() const;
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protected:
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virtual ~VolumeTile();
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friend class Volume;
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Volume* _volume;
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bool _dirty;
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bool _hasBeenTraversal;
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TileID _tileID;
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osg::ref_ptr<VolumeTechnique> _volumeTechnique;
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osg::ref_ptr<Locator> _locator;
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osg::ref_ptr<Layer> _layer;
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};
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}
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#endif
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