C++ TileNode::getKey方法代码示例

osg::Node*
SingleKeyNodeFactory::createTile(TileModel* model, bool setupChildrenIfNecessary)
{
    // compile the model into a node:
    TileNode* tileNode = _modelCompiler->compile( model, _frame );

    // see if this tile might have children.
    bool prepareForChildren =
        setupChildrenIfNecessary &&
        model->_tileKey.getLOD() < *_options.maxLOD();

    osg::Node* result = 0L;

    if ( prepareForChildren )
    {
        //Compute the min range based on the 2D size of the tile
        osg::BoundingSphere bs = tileNode->getBound();
        GeoExtent extent = model->_tileKey.getExtent();
        GeoPoint lowerLeft(extent.getSRS(), extent.xMin(), extent.yMin(), 0.0, ALTMODE_ABSOLUTE);
        GeoPoint upperRight(extent.getSRS(), extent.xMax(), extent.yMax(), 0.0, ALTMODE_ABSOLUTE);
        osg::Vec3d ll, ur;
        lowerLeft.toWorld( ll );
        upperRight.toWorld( ur );
        double radius = (ur - ll).length() / 2.0;
        float minRange = (float)(radius * _options.minTileRangeFactor().value());

        TilePagedLOD* plod = new TilePagedLOD( _engineUID, _liveTiles, _deadTiles );
        plod->setCenter  ( bs.center() );
        plod->addChild   ( tileNode );
        plod->setRange   ( 0, minRange, FLT_MAX );
        plod->setFileName( 1, Stringify() << tileNode->getKey().str() << "." << _engineUID << ".osgearth_engine_mp_tile" );
        plod->setRange   ( 1, 0, minRange );

#if USE_FILELOCATIONCALLBACK
        osgDB::Options* options = Registry::instance()->cloneOrCreateOptions();
        options->setFileLocationCallback( new FileLocationCallback() );
        plod->setDatabaseOptions( options );
#endif
        
        result = plod;

        // this one rejects back-facing tiles:
        if ( _frame.getMapInfo().isGeocentric() && _options.clusterCulling() == true )
        {
            osg::HeightField* hf =
                model->_elevationData.getHeightField();

            result->addCullCallback( HeightFieldUtils::createClusterCullingCallback(
                hf,
                tileNode->getKey().getProfile()->getSRS()->getEllipsoid(),
                *_options.verticalScale() ) );
        }
    }
    else
    {
        result = tileNode;
    }

    return result;
}

// The osgDB::DatabasePager will call this method when merging a new child
// into the scene graph.
bool
TilePagedLOD::addChild(osg::Node* node)
{
    if ( node )
    {
        // if we see an invalid tile marker, disable the paged lod slot.
        if ( dynamic_cast<InvalidTileNode*>(node) )
        {
            this->setFileName( 1, "" );
            this->setRange( 1, 0, 0 );
            this->setRange( 0, 0.0f, FLT_MAX );
            return true;
        }

        // If it's a TileNode, this is the simple first addition of the 
        // static TileNode child (not from the pager).
        TileNode* tilenode = dynamic_cast<TileNode*>( node );
        if ( tilenode && _live.get() )
        {
            _live->add( tilenode );

            // Listen for out east and south neighbors.
            const TileKey& key = tilenode->getKey();
            _live->listenFor( key.createNeighborKey(1, 0), tilenode );
            _live->listenFor( key.createNeighborKey(0, 1), tilenode );
        }

        return osg::PagedLOD::addChild( node );
    }

    return false;
}

osg::Node*
SerialKeyNodeFactory::createTile(TileModel* model,
                                 bool       tileHasRealData)
{
    // compile the model into a node:
    TileNode* tileNode = _modelCompiler->compile( model );

    // see if this tile might have children.
    bool prepareForChildren =
        (tileHasRealData || (_options.minLOD().isSet() && model->_tileKey.getLOD() < *_options.minLOD())) &&
        model->_tileKey.getLOD() < *_options.maxLOD();

    osg::Node* result = 0L;

    if ( prepareForChildren )
    {
        //Compute the min range based on the 2D size of the tile
        osg::BoundingSphere bs = tileNode->getBound();
        GeoExtent extent = model->_tileKey.getExtent();
        GeoPoint lowerLeft(extent.getSRS(), extent.xMin(), extent.yMin(), 0.0, ALTMODE_ABSOLUTE);
        GeoPoint upperRight(extent.getSRS(), extent.xMax(), extent.yMax(), 0.0, ALTMODE_ABSOLUTE);
        osg::Vec3d ll, ur;
        lowerLeft.toWorld( ll );
        upperRight.toWorld( ur );
        double radius = (ur - ll).length() / 2.0;
        float minRange = (float)(radius * _options.minTileRangeFactor().value());

        osgDB::Options* dbOptions = Registry::instance()->cloneOrCreateOptions();

        TileGroup* plod = new TileGroup(tileNode, _engineUID, _liveTiles.get(), _deadTiles.get(), dbOptions);
        plod->setSubtileRange( minRange );


#if USE_FILELOCATIONCALLBACK
        dbOptions->setFileLocationCallback( new FileLocationCallback() );
#endif
        
        result = plod;
    }
    else
    {
        result = tileNode;
    }

    // this one rejects back-facing tiles:
    if ( _mapInfo.isGeocentric() && _options.clusterCulling() == true )
    {
        osg::HeightField* hf =
            model->_elevationData.getHeightField();

        result->addCullCallback( HeightFieldUtils::createClusterCullingCallback(
            hf,
            tileNode->getKey().getProfile()->getSRS()->getEllipsoid(),
            *_options.verticalScale() ) );
    }

    return result;
}

// The osgDB::DatabasePager will call this automatically to purge expired
// tiles from the scene graph.
bool
TilePagedLOD::removeExpiredChildren(double         expiryTime, 
                                    unsigned       expiryFrame, 
                                    osg::NodeList& removedChildren)
{
    if (_children.size()>_numChildrenThatCannotBeExpired)
    {
        unsigned cindex = _children.size() - 1;

        double   minExpiryTime   = 0.0;
        unsigned minExpiryFrames = 0;

        // these were added in osg 3.1.0+
#if OSG_VERSION_GREATER_OR_EQUAL(3,1,0)
        minExpiryTime   = _perRangeDataList[cindex]._minExpiryTime;
        minExpiryFrames = _perRangeDataList[cindex]._minExpiryFrames;
#endif

        if (!_perRangeDataList[cindex]._filename.empty() &&
            _perRangeDataList[cindex]._timeStamp   + minExpiryTime   < expiryTime &&
            _perRangeDataList[cindex]._frameNumber + minExpiryFrames < expiryFrame)
        {
            osg::Node* nodeToRemove = _children[cindex].get();
            removedChildren.push_back(nodeToRemove);

            ExpirationCollector collector( _live.get() );
            nodeToRemove->accept( collector );
            _releaser->push( collector._toRelease );

            if ( _debug )
            {
                TileNode* tileNode = getTileNode();
                std::string key = tileNode ? tileNode->getKey().str() : "unk";
                OE_NOTICE 
                    << LC << "Tile " << key << " : expiring " << collector._count << " children; "
                    << "TS = " << _perRangeDataList[cindex]._timeStamp
                    << ", MET = " << minExpiryTime
                    << ", ET = " << expiryTime
                    << "; FN = " << _perRangeDataList[cindex]._frameNumber
                    << ", MEF = " << minExpiryFrames
                    << ", EF = " << expiryFrame
                    << "\n";
            }

            return Group::removeChildren(cindex,1);
        }
    }
    return false;
}

osg::Node*
SingleKeyNodeFactory::createTile(TileModel*        model,
                                 bool              setupChildrenIfNecessary,
                                 ProgressCallback* progress)
{
#ifdef EXPERIMENTAL_TILE_NODE_CACHE
    osg::ref_ptr<TileNode> tileNode;
    TileNodeCache::Record rec;
    cache.get(model->_tileKey, rec);
    if ( rec.valid() )
    {
        tileNode = rec.value().get();
    }
    else
    {
        tileNode = _modelCompiler->compile( model, _frame );
        cache.insert(model->_tileKey, tileNode);
    }
#else
    // compile the model into a node:
    TileNode* tileNode = _modelCompiler->compile(model, _frame, progress);
#endif

    // see if this tile might have children.
    bool prepareForChildren =
        setupChildrenIfNecessary &&
        model->_tileKey.getLOD() < *_options.maxLOD();

    osg::Node* result = 0L;

    if ( prepareForChildren )
    {
        osg::BoundingSphere bs = tileNode->getBound();
        TilePagedLOD* plod = new TilePagedLOD( _engineUID, _liveTiles, _deadTiles );
        plod->setCenter  ( bs.center() );
        plod->addChild   ( tileNode );
        plod->setFileName( 1, Stringify() << tileNode->getKey().str() << "." << _engineUID << ".osgearth_engine_mp_tile" );

        if ( _options.rangeMode().value() == osg::LOD::DISTANCE_FROM_EYE_POINT )
        {
            //Compute the min range based on the 2D size of the tile
            GeoExtent extent = model->_tileKey.getExtent();
            GeoPoint lowerLeft(extent.getSRS(), extent.xMin(), extent.yMin(), 0.0, ALTMODE_ABSOLUTE);
            GeoPoint upperRight(extent.getSRS(), extent.xMax(), extent.yMax(), 0.0, ALTMODE_ABSOLUTE);
            osg::Vec3d ll, ur;
            lowerLeft.toWorld( ll );
            upperRight.toWorld( ur );
            double radius = (ur - ll).length() / 2.0;
            float minRange = (float)(radius * _options.minTileRangeFactor().value());

            plod->setRange( 0, minRange, FLT_MAX );
            plod->setRange( 1, 0, minRange );
            plod->setRangeMode( osg::LOD::DISTANCE_FROM_EYE_POINT );
        }
        else
        {
            plod->setRange( 0, 0.0f, _options.tilePixelSize().value() );
            plod->setRange( 1, _options.tilePixelSize().value(), FLT_MAX );
            plod->setRangeMode( osg::LOD::PIXEL_SIZE_ON_SCREEN );
        }



        // DBPager will set a priority based on the ratio range/maxRange.
        // This will offset that number with a full LOD #, giving LOD precedence.
        // Experimental.
        //plod->setPriorityScale( 1, model->_tileKey.getLOD()+1 );

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

        // this one rejects back-facing tiles:
        if ( _frame.getMapInfo().isGeocentric() && _options.clusterCulling() == true )
        {
            osg::HeightField* hf =
                model->_elevationData.getHeightField();

            result->addCullCallback( HeightFieldUtils::createClusterCullingCallback(
                hf,
                tileNode->getKey().getProfile()->getSRS()->getEllipsoid(),
                *_options.verticalScale() ) );
        }
    }
    else
    {
        result = tileNode;
    }

    return result;
}

osg::Node*
SingleKeyNodeFactory::createTile(TileModel*        model,
                                 bool              setupChildrenIfNecessary,
                                 ProgressCallback* progress)
{
#ifdef EXPERIMENTAL_TILE_NODE_CACHE
    osg::ref_ptr<TileNode> tileNode;
    TileNodeCache::Record rec;
    cache.get(model->_tileKey, rec);
    if ( rec.valid() )
    {
        tileNode = rec.value().get();
    }
    else
    {
        tileNode = _modelCompiler->compile( model, _frame );
        cache.insert(model->_tileKey, tileNode);
    }
#else
    // compile the model into a node:
    TileNode* tileNode = _modelCompiler->compile(model, _frame, progress);
    tileNode->setEngineUID( _engineUID );
#endif

    // see if this tile might have children.
    bool prepareForChildren =
        setupChildrenIfNecessary &&
        model->_tileKey.getLOD() < *_options.maxLOD();

    osg::Node* result = 0L;

    if ( prepareForChildren )
    {
        osg::BoundingSphere bs = tileNode->getBound();
        TilePagedLOD* plod = new TilePagedLOD( _engineUID, _liveTiles, _deadTiles );
        plod->setCenter  ( bs.center() );
        plod->addChild   ( tileNode );
        plod->setFileName( 1, Stringify() << tileNode->getKey().str() << "." << _engineUID << ".osgearth_engine_mp_tile" );
        plod->setDebug   ( _debug );

        if ( _options.rangeMode().value() == osg::LOD::DISTANCE_FROM_EYE_POINT )
        {
            //Compute the min range based on the 2D size of the tile
            GeoExtent extent = model->_tileKey.getExtent();
            double radius = 0.0;
            
#if 0
            // Test code to use the equitorial radius so that all of the tiles at the same level
            // have the same range.  This will make the poles page in more appropriately.
            if (_frame.getMapInfo().isGeocentric())
            {
                GeoExtent equatorialExtent(
                extent.getSRS(),
                extent.west(),
                -extent.height()/2.0,
                extent.east(),
                extent.height()/2.0 );
                radius = equatorialExtent.getBoundingGeoCircle().getRadius();
            }
            else
#endif
            {
                GeoPoint lowerLeft(extent.getSRS(), extent.xMin(), extent.yMin(), 0.0, ALTMODE_ABSOLUTE);
                GeoPoint upperRight(extent.getSRS(), extent.xMax(), extent.yMax(), 0.0, ALTMODE_ABSOLUTE);
                osg::Vec3d ll, ur;
                lowerLeft.toWorld( ll );
                upperRight.toWorld( ur );
                radius = (ur - ll).length() / 2.0;
            }
          
            float minRange = (float)(radius * _options.minTileRangeFactor().value());

            plod->setRange( 0, minRange, FLT_MAX );
            plod->setRange( 1, 0, minRange );
            plod->setRangeMode( osg::LOD::DISTANCE_FROM_EYE_POINT );
        }
        else
        {
            // the *2 is because we page in 4-tile sets, not individual tiles.
            float size = 2.0f * _options.tilePixelSize().value();
            plod->setRange( 0, 0.0f, size );
            plod->setRange( 1, size, FLT_MAX );
            plod->setRangeMode( osg::LOD::PIXEL_SIZE_ON_SCREEN );
        }
        
        // Install a tile-aligned bounding box in the pager node itself so we can do
        // visibility testing before paging in subtiles.
        plod->setChildBoundingBoxAndMatrix(
            1,
            tileNode->getTerrainBoundingBox(),
            tileNode->getMatrix() );

        // DBPager will set a priority based on the ratio range/maxRange.
        // This will offset that number with a full LOD #, giving LOD precedence.
        // Experimental.
        //plod->setPriorityScale( 1, model->_tileKey.getLOD()+1 );

#if USE_FILELOCATIONCALLBACK
        osgDB::Options* options = plod->getOrCreateDBOptions();
        options->setFileLocationCallback( new FileLocationCallback() );
//.........这里部分代码省略.........

TileNode*
TileGroupFactory::createTileNodeGraph(TerrainTileModel* model,
                                      bool              setupChildrenIfNecessary,
                                      ProgressCallback* progress)
{
    // TODO: fix this
    const unsigned tileSize = 17;

    // Build the surface node.
    SurfaceNodeFactory factory(model, _frame, _renderBindings, _geometryPool, tileSize, _options);
    SurfaceNode* surfaceNode = factory.createSurfaceNode();

    surfaceNode->setEngineUID( _terrainEngine->getUID() );

    // see if this tile might have children.
    bool prepareForChildren =
        setupChildrenIfNecessary &&
        model->getKey().getLOD() < *_options.maxLOD();
    
    // Build the Tile Node that will hold all the textures and texture matrices.
    TileNode* tileNode = createTileNode(
        model,
        progress );

    // Build the paging node that will load subtiles, if necessary:
    if ( prepareForChildren )
    {
        osg::BoundingSphere bs = surfaceNode->getBound();
        TilePagedLOD* plod = new TilePagedLOD( _terrainEngine->getUID(), _liveTiles, _deadTiles );
        plod->setCenter  ( bs.center() );
        plod->addChild   ( surfaceNode );
        plod->setFileName( 1, Stringify() 
            << model->getKey().str()
            << "." << _terrainEngine->getUID()
            << ".osgearth_engine_mp_tile" );

        if ( _options.rangeMode().value() == osg::LOD::DISTANCE_FROM_EYE_POINT )
        {
            //Compute the min range based on the 2D size of the tile
            GeoExtent extent = model->getKey().getExtent();
            GeoPoint lowerLeft(extent.getSRS(), extent.xMin(), extent.yMin(), 0.0, ALTMODE_ABSOLUTE);
            GeoPoint upperRight(extent.getSRS(), extent.xMax(), extent.yMax(), 0.0, ALTMODE_ABSOLUTE);
            osg::Vec3d ll, ur;
            lowerLeft.toWorld( ll );
            upperRight.toWorld( ur );
            double radius = (ur - ll).length() / 2.0;
            float minRange = (float)(radius * _options.minTileRangeFactor().value());

            plod->setRange( 0, minRange, FLT_MAX );
            plod->setRange( 1, 0, minRange );
            plod->setRangeMode( osg::LOD::DISTANCE_FROM_EYE_POINT );
        }
        else
        {
            plod->setRange( 0, 0.0f, _options.tilePixelSize().value() );
            plod->setRange( 1, _options.tilePixelSize().value(), FLT_MAX );
            plod->setRangeMode( osg::LOD::PIXEL_SIZE_ON_SCREEN );
        }
        
#if 0 // TODO: reinstate this!

        // Install a tile-aligned bounding box in the pager node itself so we can do
        // visibility testing before paging in subtiles.
        plod->setChildBoundingBoxAndMatrix(
            1,
            surfaceNode->getTerrainBoundingBox(),
            surfaceNode->getLocalToWorldMatrix() );
#endif

#if USE_FILELOCATIONCALLBACK
        osgDB::Options* options = plod->getOrCreateDBOptions();
        options->setFileLocationCallback( new FileLocationCallback() );
#endif
        
        tileNode->addChild( plod );

        // Install a callback to reject back-facing tiles.
        if ( _frame.getMapInfo().isGeocentric() && _options.clusterCulling() == true )
        {
            const osg::HeightField* heightField = model->elevationModel()->getHeightField();
            if ( heightField )
            {
                tileNode->addCullCallback( HeightFieldUtils::createClusterCullingCallback(
                    heightField,
                    tileNode->getKey().getProfile()->getSRS()->getEllipsoid(),
                    *_options.verticalScale() ) );
            }
        }
    }
    else
    {
        tileNode->addChild( surfaceNode );
    }

    return tileNode;
}