Esempio n. 1
0
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
TileModelFactory::buildNormalMap(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;
    osg::ref_ptr<osg::HeightField> parentHF;
    osg::ref_ptr<const TileModel>  parentModel;

    bool isFallback = false;

    unsigned minNormalLOD =
        _terrainOptions.minNormalMapLOD().isSet() ?
        _terrainOptions.minNormalMapLOD().get() : 0u;

    if ( key.getLOD() >= minNormalLOD )
    {
        // look up the parent's heightfield to use as a template
    
        TileKey parentKey = key.createParentKey();
        if ( accumulate )
        {
            osg::ref_ptr<TileNode> parentNode;
            if (_liveTiles->get(parentKey, parentNode))
            {
                parentModel = parentNode->getTileModel();
                parentHF = parentModel->_normalData.getHeightField();
                if ( parentHF->getNumColumns() == EMPTY_NORMAL_MAP_SIZE )
                    parentHF = 0L;
            }
        }

        // Make a new heightfield:
        if (_normalHFCache->getOrCreateHeightField(frame, key, parentHF.get(), hf, isFallback, SAMPLE_FIRST_VALID, interp, progress))
        {
            if ( isFallback && parentModel.valid() )
            {
                model->_normalData = parentModel->_normalData;
                model->_normalData._fallbackData = true;
            }
            else
            {
                model->_normalData = TileModel::NormalData(
                    hf,
                    GeoLocator::createForKey( key, mapInfo ),
                    isFallback );
            }
        }
    }

    else
    {
        // empty HF must be at least 2x2 for normal texture gen to work
        hf = HeightFieldUtils::createReferenceHeightField(
            key.getExtent(), EMPTY_NORMAL_MAP_SIZE, EMPTY_NORMAL_MAP_SIZE, true );

        model->_normalData = TileModel::NormalData(
            hf,
            GeoLocator::createForKey( key, mapInfo ),
            false );
    }

    if ( isFallback && parentModel.valid() )
    {
        model->_normalTexture = parentModel->_normalTexture.get();
    }
    else
    {
        model->generateNormalTexture();
    }
}
void
TileModelFactory::buildElevation(const TileKey&    key,
                                 const MapFrame&   frame,
                                 bool              accumulate,
                                 bool              buildTexture,
                                 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;

    // look up the parent's heightfield to use as a template
    osg::ref_ptr<osg::HeightField> parentHF;
    TileKey parentKey = key.createParentKey();
    if ( accumulate )
    {
        osg::ref_ptr<TileNode> parentNode;
        if (_liveTiles->get(parentKey, parentNode))
        {
            parentHF = parentNode->getTileModel()->_elevationData.getHeightField();
            if ( _debug && key.getLOD() > 0 && !parentHF.valid() )
            {
                OE_NOTICE << LC << "Could not find a parent tile HF for " << key.str() << "\n";
            }
        }
    }

    // Make a new heightfield:
    if (_meshHFCache->getOrCreateHeightField(frame, key, parentHF.get(), 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 neighborKey = key.createNeighborKey(x, y);
                        if ( neighborKey.valid() )
                        {
                            osg::ref_ptr<osg::HeightField> neighborParentHF;
                            if ( accumulate )
                            {
                                TileKey neighborParentKey = neighborKey.createParentKey();
                                if (neighborParentKey == parentKey)
                                {
                                    neighborParentHF = parentHF;
                                }
                                else
                                {
                                    osg::ref_ptr<TileNode> neighborParentNode;
                                    if (_liveTiles->get(neighborParentKey, neighborParentNode))
                                    {
                                        neighborParentHF = neighborParentNode->getTileModel()->_elevationData.getHeightField();
                                    }
                                }
                            }

                            // only pull the tile if we have a valid parent HF for it -- otherwise
                            // you might get a flat tile when upsampling data.
                            if ( neighborParentHF.valid() )
                            {
                                osg::ref_ptr<osg::HeightField> hf;
                                if (_meshHFCache->getOrCreateHeightField(frame, neighborKey, neighborParentHF.get(), hf, isFallback, SAMPLE_FIRST_VALID, interp, progress) )
                                {
                                    model->_elevationData.setNeighbor( x, y, hf.get() );
                                }
                            }
                        }
                    }
                }
            }

            // parent too.
            if ( parentHF.valid() )
            {
                model->_elevationData.setParent( parentHF.get() );
            }
        }

        if ( buildTexture )
        {
            model->generateElevationTexture();
        }
    }
}