C++ TileKey::valid方法代码示例

unsigned int
CacheEstimator::getNumTiles() const
{
    unsigned int total = 0;

    for (unsigned int level = _minLevel; level <= _maxLevel; level++)
    {
        if (_extents.empty())
        {
            unsigned int wide, high;
            _profile->getNumTiles( level, wide, high );
            total += (wide * high);
        }
        else
        {
            for (std::vector< GeoExtent >::const_iterator itr = _extents.begin(); itr != _extents.end(); ++itr)
            {
                const GeoExtent& extent = *itr;

                TileKey ll = _profile->createTileKey(extent.xMin(), extent.yMin(), level);
                TileKey ur = _profile->createTileKey(extent.xMax(), extent.yMax(), level);

                if (!ll.valid() || !ur.valid()) continue;
                
                int tilesWide = ur.getTileX() - ll.getTileX() + 1;
                int tilesHigh = ll.getTileY() - ur.getTileY() + 1;
                int tilesAtLevel = tilesWide * tilesHigh;                
                total += tilesAtLevel;
            }
        }
    }
    return total;
}

bool
OSGTileFactory::createValidGeoImage(ImageLayer* layer,
                                    const TileKey& key,
                                    GeoImage& out_image,
                                    TileKey&  out_actualTileKey,
                                    ProgressCallback* progress)
{
    //TODO:  Redo this to just grab images from the parent TerrainTiles
    //Try to create the image with the given key
    out_actualTileKey = key;

    while (out_actualTileKey.valid())
    {
        if ( layer->isKeyValid(out_actualTileKey) )
        {
            out_image = layer->createImage( out_actualTileKey, progress );
            if ( out_image.valid() )
            {
                return true;
            }
        }
        out_actualTileKey = out_actualTileKey.createParentKey();
    }
    return false;
}

// This will be called by AnnotationNode when a new terrain tile comes in.
void
FeatureNode::onTileAdded(const TileKey&          key,
                         osg::Node*              graph,
                         TerrainCallbackContext& context)
{
    if (!_clampDirty)
    {
        bool needsClamp;

        if (key.valid())
        {
            osg::Polytope tope;
            key.getExtent().createPolytope(tope);
            needsClamp = tope.contains(this->getBound());
        }
        else
        {
            // without a valid tilekey we don't know the extent of the change,
            // so clamping is required.
            needsClamp = true;
        }

        if (needsClamp)
        {
            _clampDirty = true;
            ADJUST_UPDATE_TRAV_COUNT(this, +1);
            //clamp(graph, context.getTerrain());
        }
    }
}

bool
TerrainLayer::isKeyValid(const TileKey& key) const
{
	if (!key.valid()) return false;
    const TerrainLayerOptions& opt = getTerrainLayerOptions();
	
    //Check to see if explicit levels of detail are set
    if ( opt.minLevel().isSet() && (int)key.getLevelOfDetail() < opt.minLevel().value() ) return false;
	if ( opt.maxLevel().isSet() && (int)key.getLevelOfDetail() > opt.maxLevel().value() ) return false;
    
    //Check to see if levels of detail based on resolution are set
    if (opt.minLevelResolution().isSet())
    {        
        unsigned int minLevel = getProfile()->getLevelOfDetailForHorizResolution( opt.minLevelResolution().value(), getTileSize());
        OE_DEBUG << "Computed min level of " << minLevel << std::endl;
        if (key.getLevelOfDetail() < minLevel) return false;
    }

    if (opt.maxLevelResolution().isSet())
    {        
        unsigned int maxLevel = getProfile()->getLevelOfDetailForHorizResolution( opt.maxLevelResolution().value(), getTileSize());
        OE_DEBUG << "Computed max level of " << maxLevel << std::endl;
        if (key.getLevelOfDetail() > maxLevel) return false;
    }

	return true;
}

void
TileModelFactory::buildElevation(const TileKey&    key,
                                 const MapFrame&   frame,
                                 bool              accumulate,
                                 TileModel*        model,
                                 ProgressCallback* progress)
{     
    const MapInfo& mapInfo = frame.getMapInfo();

    const osgEarth::ElevationInterpolation& interp =
        frame.getMapOptions().elevationInterpolation().get();

    // Request a heightfield from the map, falling back on lower resolution tiles
    // if necessary (fallback=true)
    osg::ref_ptr<osg::HeightField> hf;

    bool isFallback = false;

    if (_hfCache->getOrCreateHeightField(frame, key, accumulate, hf, isFallback, SAMPLE_FIRST_VALID, interp, progress))
    {
        model->_elevationData = TileModel::ElevationData(
            hf,
            GeoLocator::createForKey( key, mapInfo ),
            isFallback );

        // Edge normalization: requires adjacency information
        if ( _terrainOptions.normalizeEdges() == true )
        {
            for( int x=-1; x<=1; x++ )
            {
                for( int y=-1; y<=1; y++ )
                {
                    if ( x != 0 || y != 0 )
                    {
                        TileKey nk = key.createNeighborKey(x, y);
                        if ( nk.valid() )
                        {
                            osg::ref_ptr<osg::HeightField> hf;
                            if (_hfCache->getOrCreateHeightField(frame, nk, accumulate, hf, isFallback, SAMPLE_FIRST_VALID, interp, progress) )
                            {
                                model->_elevationData.setNeighbor( x, y, hf.get() );
                            }
                        }
                    }
                }
            }

            // parent too.
            if ( key.getLOD() > 0 )
            {
                osg::ref_ptr<osg::HeightField> hf;
                if ( _hfCache->getOrCreateHeightField(frame, key.createParentKey(), accumulate, hf, isFallback, SAMPLE_FIRST_VALID, interp, progress) )
                {
                    model->_elevationData.setParent( hf.get() );
                }
            }
        }
    }
}

void
OSGTileFactory::addPlaceholderHeightfieldLayer(StreamingTile* tile,
                                               StreamingTile* ancestorTile,
                                               GeoLocator*    defaultLocator,
                                               const TileKey& key,
                                               const TileKey& ancestorKey)
{
    osgTerrain::HeightFieldLayer* newHFLayer = 0L;

    if ( ancestorTile && ancestorKey.valid() )
    {
        osg::ref_ptr<osgTerrain::HeightFieldLayer> ancestorLayer;
        {
            Threading::ScopedReadLock sharedLock( ancestorTile->getTileLayersMutex() );
            ancestorLayer = dynamic_cast<osgTerrain::HeightFieldLayer*>(ancestorTile->getElevationLayer());
        }

        if ( ancestorLayer.valid() )
        {
            osg::ref_ptr<osg::HeightField> ancestorHF = ancestorLayer->getHeightField();
            if ( ancestorHF.valid() )
            {
                osg::HeightField* newHF = HeightFieldUtils::createSubSample(
                    ancestorHF.get(),
                    ancestorKey.getExtent(),
                    key.getExtent());

                newHFLayer = new osgTerrain::HeightFieldLayer( newHF );
                newHFLayer->setLocator( defaultLocator );

                // lock to set the elevation layerdata:
                {
                    Threading::ScopedWriteLock exclusiveLock( tile->getTileLayersMutex() );
                    tile->setElevationLayer( newHFLayer );                
                    tile->setElevationLOD( ancestorTile->getElevationLOD() );
                }
            }
        }
    }

    // lock the tile to write the elevation data.
    {
        Threading::ScopedWriteLock exclusiveLock( tile->getTileLayersMutex() );

        if ( !newHFLayer )
        {
            newHFLayer = new osgTerrain::HeightFieldLayer();
            newHFLayer->setHeightField( createEmptyHeightField( key, 8, 8 ) );
            newHFLayer->setLocator( defaultLocator );
            tile->setElevationLOD( -1 );
        }

        if ( newHFLayer )
        {
            tile->setElevationLayer( newHFLayer );
        }
    }
}

osg::Node*
MPTerrainEngineNode::createTile( const TileKey& key )
{
    osg::ref_ptr<TileModel> model = new TileModel( _update_mapf->getRevision(), _update_mapf->getMapInfo() );
    model->_tileKey = key;
    model->_tileLocator = GeoLocator::createForKey(key, _update_mapf->getMapInfo());

    // Build the heightfield

    const MapInfo& mapInfo = _update_mapf->getMapInfo();

    const osgEarth::ElevationInterpolation& interp = _update_mapf->getMapOptions().elevationInterpolation().get();

    // Request a heightfield from the map, falling back on lower resolution tiles
    osg::ref_ptr<osg::HeightField> hf;    

    TileKey sampleKey = key;
    bool populated = false;
    if (_update_mapf->elevationLayers().size() > 0)
    {
        while (!populated)
        {
            populated = _update_mapf->populateHeightField(hf, sampleKey, true, SAMPLE_FIRST_VALID);
            if (!populated)
            {
                // Fallback on the parent
                sampleKey = sampleKey.createParentKey();
                if (!sampleKey.valid())
                {
                    return 0;
                }
            }
        }       
    }

    if (!populated)
    {
        // We have no heightfield so just create a reference heightfield.
        hf = HeightFieldUtils::createReferenceHeightField( key.getExtent(), 15, 15 );
        sampleKey = key;
    }

    model->_elevationData = TileModel::ElevationData(
            hf,
            GeoLocator::createForKey( sampleKey, mapInfo ),
            false );        

    bool optimizeTriangleOrientation = getMap()->getMapOptions().elevationInterpolation() != INTERP_TRIANGULATE;

    osg::ref_ptr<TileModelCompiler> compiler = new TileModelCompiler(
            _update_mapf->terrainMaskLayers(),
            _update_mapf->modelLayers(),
            _primaryUnit,
            optimizeTriangleOrientation,
            _terrainOptions );

    return compiler->compile(model.get(), *_update_mapf, 0L);
}

void
ImageOverlay::onTileAdded(const TileKey&          key, 
                          osg::Node*              graph, 
                          TerrainCallbackContext& context)
{
    if ( graph == 0L || !key.valid() || _boundingPolytope.contains(graph->getBound()) )
    {
        clamp( graph, context.getTerrain() );
    }
}

bool
TerrainLayer::isKeyInLegalRange(const TileKey& key) const
{    
    if ( !key.valid() )
    {
        return false;
    }

    // We must use the equivalent lod b/c the input key can be in any profile.
    unsigned localLOD = getProfile() ?
        getProfile()->getEquivalentLOD(key.getProfile(), key.getLOD()) :
        key.getLOD();


    // First check the key against the min/max level limits, it they are set.
    if ((options().maxLevel().isSet() && localLOD > options().maxLevel().value()) ||
        (options().minLevel().isSet() && localLOD < options().minLevel().value()))
    {
        return false;
    }

    // Next check the maxDataLevel if that is set.
    if (options().maxDataLevel().isSet() && localLOD > options().maxDataLevel().get())
    {
        return false;
    }

    // Next, check against resolution limits (based on the source tile size).
    if (options().minResolution().isSet() || options().maxResolution().isSet())
    {
        const Profile* profile = getProfile();
        if ( profile )
        {
            // calculate the resolution in the layer's profile, which can
            // be different that the key's profile.
            double resKey   = key.getExtent().width() / (double)getTileSize();
            double resLayer = key.getProfile()->getSRS()->transformUnits(resKey, profile->getSRS());

            if (options().maxResolution().isSet() &&
                options().maxResolution().value() > resLayer)
            {
                return false;
            }

            if (options().minResolution().isSet() &&
                options().minResolution().value() < resLayer)
            {
                return false;
            }
        }
    }

	return true;
}

bool
ElevationLayer::isKeyValid(const TileKey& key) const
{
    if (!key.valid())
        return false;

    if ( _runtimeOptions.minLevel().isSet() && key.getLOD() < _runtimeOptions.minLevel().value() ) 
    {
        return false;
    }

    return TerrainLayer::isKeyValid(key);
}

void
Terrain::notifyTileAdded( const TileKey& key, osg::Node* node )
{
    if ( !node )
    {
        OE_WARN << LC << "notify with a null node!" << std::endl;
    }

    if (_callbacksSize > 0)
    {
        if (!key.valid())
            OE_WARN << LC << "notifyTileAdded with key = NULL\n";

        _updateQueue->add(new OnTileAddedOperation(key, node, this));
    }
}

bool
TerrainLayer::isKeyInRange(const TileKey& key) const
{    
    if ( !key.valid() )
    {
        return false;
    }

    // First check the key against the min/max level limits, it they are set.
    if ((_runtimeOptions->maxLevel().isSet() && key.getLOD() > _runtimeOptions->maxLevel().value()) ||
        (_runtimeOptions->minLevel().isSet() && key.getLOD() < _runtimeOptions->minLevel().value()))
    {
        return false;
    }

    // Next, check against resolution limits (based on the source tile size).
    if (_runtimeOptions->minResolution().isSet() ||
        _runtimeOptions->maxResolution().isSet())
    {
        const Profile* profile = getProfile();
        if ( profile )
        {
            // calculate the resolution in the layer's profile, which can
            // be different that the key's profile.
            double resKey   = key.getExtent().width() / (double)getTileSize();
            double resLayer = key.getProfile()->getSRS()->transformUnits(resKey, profile->getSRS());

            if (_runtimeOptions->maxResolution().isSet() &&
                _runtimeOptions->maxResolution().value() > resLayer)
            {
                return false;
            }

            if (_runtimeOptions->minResolution().isSet() &&
                _runtimeOptions->minResolution().value() < resLayer)
            {
                return false;
            }
        }
    }

	return true;
}

bool
TerrainLayer::isKeyValid(const TileKey& key) const
{    
    if (!key.valid())
        return false;

    // Check to see if an explicity max LOD is set. Do NOT compare against the minLevel,
    // because we still need to create empty tiles until we get to the data. The ImageLayer
    // will deal with this.
    if ( _runtimeOptions->maxLevel().isSet() && key.getLOD() > _runtimeOptions->maxLevel().value() ) 
    {
        return false;
    }

    // Check to see if levels of detail based on resolution are set
    const Profile* profile = getProfile();
    if ( profile )
    {
        if ( !profile->isEquivalentTo( key.getProfile() ) )
        {
            OE_DEBUG << LC
                << "TerrainLayer::isKeyValid called with key of a different profile" << std::endl;
            //return true;
        }

        if ( _runtimeOptions->maxResolution().isSet() )
        {
            double keyres = key.getExtent().width() / (double)getTileSize();
            double keyresInLayerProfile = key.getProfile()->getSRS()->transformUnits(keyres, profile->getSRS());

            if ( _runtimeOptions->maxResolution().isSet() && keyresInLayerProfile < _runtimeOptions->maxResolution().value() )
            {
                return false;
            }
        }
    }

	return true;
}

bool
ElevationPool::fetchTileFromMap(const TileKey& key, MapFrame& frame, Tile* tile)
{
    tile->_loadTime = osg::Timer::instance()->tick();

    osg::ref_ptr<osg::HeightField> hf = new osg::HeightField();
    hf->allocate( _tileSize, _tileSize );

    // Initialize the heightfield to nodata
    hf->getFloatArray()->assign( hf->getFloatArray()->size(), NO_DATA_VALUE );

    TileKey keyToUse = key;
    while( !tile->_hf.valid() && keyToUse.valid() )
    {
        bool ok;
        if (_layers.empty())
        {
            OE_TEST << LC << "Populating from FULL MAP (" << keyToUse.str() << ")\n";
            ok = frame.populateHeightField(hf, keyToUse, false /*heightsAsHAE*/, 0L);
        }
        else
        {
            OE_TEST << LC << "Populating from layers (" << keyToUse.str() << ")\n";
            ok = _layers.populateHeightFieldAndNormalMap(hf.get(), 0L, keyToUse, 0L, INTERP_BILINEAR, 0L);
        }

        if (ok)
        {
            tile->_hf = GeoHeightField( hf.get(), keyToUse.getExtent() );
            tile->_bounds = keyToUse.getExtent().bounds();
        }
        else
        {
            keyToUse = keyToUse.createParentKey();
        }
    }

    return tile->_hf.valid();
}

//.........这里部分代码省略.........
    unsigned int maxHeightFields = 50;
    unsigned numHeightFieldsInCache = 0;

    //double fallBackTime = 0;

    const SpatialReference* keySRS = keyToUse.getProfile()->getSRS();

    bool realData = false;

    //unsigned int numFallback = 0;


    unsigned int total = numColumns * numRows;
    unsigned int completed = 0;

    for (unsigned c = 0; c < numColumns; ++c)
    {
        double x = xmin + (dx * (double)c);
        for (unsigned r = 0; r < numRows; ++r)
        {
            double y = ymin + (dy * (double)r);

            // Collect elevations from each layer as necessary.
            bool resolved = false;

            for(int i=0; i<contenders.size() && !resolved; ++i)
            {
                if ( heightFailed[i] )
                    continue;

                ElevationLayer* layer = contenders[i].first.get();

                GeoHeightField& layerHF = heightFields[i];
                if ( !layerHF.valid() )
                {
                    layerHF = layer->createHeightField(contenders[i].second, progress);
                    
                    if ( !layerHF.valid() )
                    {
                        // This layer potentially has data or it wouldn't have ended up in the contendors list, so try falling back on the parent
                        TileKey parentKey = contenders[i].second.createParentKey();
                        while (!layerHF.valid() && parentKey.valid())
                        {
                            //numFallback++;
                            //osg::Timer_t fbStartTime = osg::Timer::instance()->tick();
                            GeoHeightField parentHF = layer->createHeightField(parentKey, progress);
                            //osg::Timer_t fbEndTime = osg::Timer::instance()->tick();

                            // Only penalize time wasted actually falling back.
                            //if (!parentHF.valid())
                            // {
                            //    fallBackTime += osg::Timer::instance()->delta_m(fbStartTime, fbEndTime);
                            //}

                            if (parentHF.valid())
                            {
                                layerHF = parentHF;
                                break;
                            }
                            else
                            {
                                parentKey = parentKey.createParentKey();
                            }

                        }