/usr/include/osgEarthUtil/SpatialData is in libosgearth-dev 2.4.0+dfsg-6.
This file is owned by root:root, with mode 0o644.
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/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2008-2013 Pelican Mapping
* http://osgearth.org
*
* osgEarth 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.
*
* This program 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
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#ifndef OSGEARTHUTIL_SPATIAL_DATA
#define OSGEARTHUTIL_SPATIAL_DATA
#include <osgEarthUtil/Common>
#include <osgEarth/GeoData>
#include <osg/observer_ptr>
#include <osg/Geode>
#include <osg/Plane>
#include <osg/LOD>
#include <map>
namespace osgEarth { namespace Util
{
using namespace osgEarth;
class GeoObject;
//typedef std::vector< osg::ref_ptr<GeoObject> > GeoObjectVector;
typedef std::pair< float, osg::ref_ptr<GeoObject> > GeoObjectPair;
typedef std::multimap< float, osg::ref_ptr<GeoObject> > GeoObjectCollection;
/**
* A group corresponding to a specific geospatial cell.
*/
class OSGEARTHUTIL_EXPORT GeoCell : public osg::LOD
{
public:
GeoCell(
const GeoExtent& extent,
float maxRange,
unsigned maxOjbects,
unsigned splitDim,
float splitRangeFactor,
unsigned depth );
/** dtor */
virtual ~GeoCell() { }
/** Adds an object to this geocell graph. */
virtual bool insertObject( GeoObject* object );
/** Removes an object from this geocell graph. */
bool removeObject( GeoObject* object );
/** Re-index an object withing the geocell graph based on a new position. */
bool reindexObject( GeoObject* object );
/** The number of rows and columns into which this cell will split */
unsigned getSplitDimension() const { return _splitDim; }
/** The maximum number of objects this cell can hold before splitting */
unsigned getMaxObjects() const { return _maxObjects; }
/** Child cells have a maximum LOD range of this cell's max range times this factor. */
float getSplitRangeFactor() const { return _splitRangeFactor; }
/** the extent of this cell */
const GeoExtent& getExtent() const { return _extent; }
/** gets the frame number of the last time this cell passed cull */
unsigned getLastCullFrame() const { return _frameStamp; }
public: // osg::LOD overrides
virtual osg::BoundingSphere computeBound() const;
virtual void traverse( osg::NodeVisitor& nv );
protected:
GeoExtent _extent;
unsigned _splitDim;
unsigned _maxObjects; // maximum # of objects to render in this cell before splitting.
unsigned _minObjects; // minimum # of objects to drop below before pulling up
float _maxRange; // maximum visibility range of this cell.
float _splitRangeFactor; // child range = cell range * factor
unsigned _count; // # of objects in this cell (including all children)
unsigned _depth;
unsigned _frameStamp; // last fram this cell was visited by CULL
void split();
void merge();
void adjustCount( int delta );
bool intersects( const class osg::Polytope& tope ) const;
void generateBoundaries();
void generateBoundaryGeometry();
std::vector<osg::Vec3d> _boundaryPoints;
// priority-order collection of objects
GeoObjectCollection _objects;
osg::ref_ptr<osg::Geode> _clusterGeode;
osg::ref_ptr<osg::Geode> _boundaryGeode;
osg::Vec4Array* _boundaryColor;
friend class GeoCellVisitor;
};
class OSGEARTHUTIL_EXPORT GeoGraph : public GeoCell
{
public:
GeoGraph(
const GeoExtent& extent,
float maxRange,
unsigned maxObjects =500,
unsigned splitDim =2,
float splitRangeFactor =0.5f,
unsigned rootWidth =2,
unsigned rootHeight =2 );
/** dtor */
virtual ~GeoGraph() { }
bool insertObject( GeoObject* object );
private:
unsigned _rootWidth, _rootHeight;
};
class GeoCellVisitor : public osg::NodeVisitor
{
public:
GeoCellVisitor() : osg::NodeVisitor( osg::NodeVisitor::TRAVERSE_ALL_CHILDREN ) { }
virtual ~GeoCellVisitor() { }
virtual void operator()( const GeoCell* cell, const GeoObjectCollection& objects ) =0;
void apply( osg::LOD& node ) {
const GeoCell* cell = static_cast<const GeoCell*>(&node);
if ( cell->_depth > 0 )
this->operator()( cell, cell->_objects );
traverse( node );
}
};
/**
* Base class for an object indexed by a GeoCell hierarchy.
*/
class OSGEARTHUTIL_EXPORT GeoObject : public osg::Referenced
{
public:
/**
* Outputs the location (for spatial indexing), which must be in the same
* SRS as the GeoGraph.
*/
virtual bool getLocation( osg::Vec3d& output ) const =0;
/** The priority of the object relative to other objects */
virtual float getPriority() const { return 0.0; }
/** Gets the node to render for this object. */
virtual osg::Node* getNode() const =0;
/** The cell currently holding this object. */
GeoCell* getGeoCell() const { return _cell.get(); }
protected:
GeoObject();
virtual ~GeoObject() { }
osg::observer_ptr<GeoCell> _cell;
float _priority;
friend class GeoCell;
};
} } // namespace osgEarth::Util
#endif // OSGEARTHUTIL_SPATIAL_DATA
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