SerialKeyNodeFactory Class Reference

Inheritance diagram for SerialKeyNodeFactory:

Collaboration diagram for SerialKeyNodeFactory:

List of all members.

Public Member Functions
	SerialKeyNodeFactory (TileBuilder *builder, const OSGTerrainOptions &options, const MapInfo &mapInfo, Terrain *terrain, UID engineUID)
osg::Node *	createNode (const TileKey &key)
Protected Member Functions
void	addTile (Tile *tile, bool tileHasRealData, bool tileHasLodBlending, osg::Group *parent)
Protected Attributes
TileBuilder *	_builder
const OSGTerrainOptions &	_options
const MapInfo	_mapInfo
Terrain *	_terrain
UID	_engineUID

---

Detailed Description

Definition at line 29 of file SerialKeyNodeFactory.

---

Constructor & Destructor Documentation

SerialKeyNodeFactory::SerialKeyNodeFactory	(	TileBuilder *	builder,
		const OSGTerrainOptions &	options,
		const MapInfo &	mapInfo,
		Terrain *	terrain,
		UID	engineUID
	)

Definition at line 35 of file SerialKeyNodeFactory.cpp.

                                                                                :
_builder( builder ),
_options( options ),
_mapInfo( mapInfo ),
_terrain( terrain ),
_engineUID( engineUID )
{
    //NOP
}

---

Member Function Documentation

void SerialKeyNodeFactory::addTile	(	Tile *	tile,
		bool	tileHasRealData,
		bool	tileHasLodBlending,
		osg::Group *	parent
	)		[protected]

Definition at line 50 of file SerialKeyNodeFactory.cpp.

{
    // associate this tile with the terrain:
    tile->setTerrainTechnique( _terrain->cloneTechnique() );
    tile->attachToTerrain( _terrain );

    // assemble a URI for this tile's child group:
    std::stringstream buf;
    buf << tile->getKey().str() << "." << _engineUID << ".osgearth_osgterrain_tile";
    std::string uri; uri = buf.str();

    osg::Node* result = 0L;

    // Only add the next tile if it hasn't been blacklisted
    bool wrapInPagedLOD =
        tileHasRealData &&
        !osgEarth::Registry::instance()->isBlacklisted( uri ) &&
        tile->getKey().getLevelOfDetail() < (unsigned)*_options.maxLOD();

    if ( wrapInPagedLOD )
    {
        osg::BoundingSphere bs = tile->getBound();
        double maxRange = 1e10;
        double minRange = bs.radius() * _options.minTileRangeFactor().value();

        // create a PLOD so we can keep subdividing:
        osg::PagedLOD* plod = new osg::PagedLOD();
        plod->setCenter( bs.center() );
        plod->addChild( tile, minRange, maxRange );

        plod->setFileName( 1, uri );
        plod->setRange   ( 1, 0, minRange );

        plod->setUserData( new MapNode::TileRangeData(minRange, maxRange) );

#if USE_FILELOCATIONCALLBACK
        osgDB::Options* options = new osgDB::Options;
        options->setFileLocationCallback( new FileLocationCallback() );
        plod->setDatabaseOptions( options );

#endif
        result = plod;
        
        if ( tileHasLodBlending )
        {
            // Make the LOD transition distance, and a measure of how
            // close the tile is to an LOD change, to shaders.
            result->addCullCallback(new Drivers::LODFactorCallback);
        }
    }
    else
    {
        result = tile;
    }

    // this cull callback dynamically adjusts the LOD scale based on distance-to-camera:
    if ( _options.lodFallOff().isSet() && *_options.lodFallOff() > 0.0 )
    {
        result->addCullCallback( new DynamicLODScaleCallback(*_options.lodFallOff()) );
    }

    // this one rejects back-facing tiles:
    if ( _mapInfo.isGeocentric() )
    {
        result->addCullCallback( HeightFieldUtils::createClusterCullingCallback(
            static_cast<osgTerrain::HeightFieldLayer*>(tile->getElevationLayer())->getHeightField(),
            tile->getLocator()->getEllipsoidModel(),
            tile->getVerticalScale() ) );
    }

    parent->addChild( result );
}

Here is the call graph for this function:

Here is the caller graph for this function:

osg::Node * SerialKeyNodeFactory::createNode

(

const TileKey &

key

)

[virtual]

Implements KeyNodeFactory.

Reimplemented in ParallelKeyNodeFactory.

Definition at line 124 of file SerialKeyNodeFactory.cpp.

{
    osg::ref_ptr<Tile> tiles[4];
    bool               realData[4];
    bool               lodBlending[4];
    bool               tileHasAnyRealData = false;

    for( unsigned i = 0; i < 4; ++i )
    {
        TileKey child = key.createChildKey( i );
        _builder->createTile( child, false, tiles[i], realData[i], lodBlending[i] );
        if ( tiles[i].valid() && realData[i] )
            tileHasAnyRealData = true;
    }

    osg::Group* root = 0L;

    if ( tileHasAnyRealData )
    {
        // Now postprocess them and assemble into a tile group.
        root = new osg::Group();

        for( unsigned i = 0; i < 4; ++i )
        {
            if ( tiles[i].valid() )
            {
                addTile( tiles[i].get(), realData[i], lodBlending[i], root );
            }
        }
    }

    return root;
}

Here is the call graph for this function:

---

Member Data Documentation

TileBuilder* SerialKeyNodeFactory::_builder [protected]

Definition at line 44 of file SerialKeyNodeFactory.

UID SerialKeyNodeFactory::_engineUID [protected]

Definition at line 48 of file SerialKeyNodeFactory.

const MapInfo SerialKeyNodeFactory::_mapInfo [protected]

Definition at line 46 of file SerialKeyNodeFactory.

const OSGTerrainOptions& SerialKeyNodeFactory::_options [protected]

Definition at line 45 of file SerialKeyNodeFactory.

Terrain* SerialKeyNodeFactory::_terrain [protected]

Definition at line 47 of file SerialKeyNodeFactory.

---

The documentation for this class was generated from the following files:

• /home/cube/sources/osgearth/src/osgEarthDrivers/engine_osgterrain/SerialKeyNodeFactory
• /home/cube/sources/osgearth/src/osgEarthDrivers/engine_osgterrain/SerialKeyNodeFactory.cpp