Ejemplo n.º 1
0
osg::Node*
GeomCompiler::compile(FeatureCursor*        cursor,
                      const Style&          style,
                      const FilterContext&  context)

{
    if ( !context.profile() ) {
        OE_WARN << LC << "Valid feature profile required" << std::endl;
        return 0L;
    }

    if ( style.empty() ) {
        OE_WARN << LC << "Non-empty style required" << std::endl;
        return 0L;
    }

    osg::ref_ptr<osg::Group> resultGroup = new osg::Group();

    // start by making a working copy of the feature set
    FeatureList workingSet;
    cursor->fill( workingSet );

    // create a filter context that will track feature data through the process
    FilterContext cx = context;
    if ( !cx.extent().isSet() )
        cx.extent() = cx.profile()->getExtent();

    // only localize coordinates if the map if geocentric AND the extent is
    // less than 180 degrees.
    const MapInfo& mi = cx.getSession()->getMapInfo();
    GeoExtent workingExtent = cx.extent()->transform( cx.profile()->getSRS()->getGeographicSRS() );
    bool localize = mi.isGeocentric() && workingExtent.width() < 180.0;

    // go through the Style and figure out which filters to use.
    const MarkerSymbol*    marker    = style.get<MarkerSymbol>();
    const PointSymbol*     point     = style.get<PointSymbol>();
    const LineSymbol*      line      = style.get<LineSymbol>();
    const PolygonSymbol*   polygon   = style.get<PolygonSymbol>();
    const ExtrusionSymbol* extrusion = style.get<ExtrusionSymbol>();
    const AltitudeSymbol*  altitude  = style.get<AltitudeSymbol>();
    const TextSymbol*      text      = style.get<TextSymbol>();
    
    // transform the features into the map profile
    TransformFilter xform( mi.getProfile()->getSRS(), mi.isGeocentric() );   
    xform.setLocalizeCoordinates( localize );
    if ( altitude && altitude->verticalOffset().isSet() )
        xform.setMatrix( osg::Matrixd::translate(0, 0, *altitude->verticalOffset()) );
    cx = xform.push( workingSet, cx );

    bool clampRequired =
        altitude && altitude->clamping() != AltitudeSymbol::CLAMP_NONE;

    // model substitution
    if ( marker )
    {
        if ( marker->placement() == MarkerSymbol::PLACEMENT_RANDOM   ||
             marker->placement() == MarkerSymbol::PLACEMENT_INTERVAL )
        {
            ScatterFilter scatter;
            scatter.setDensity( *marker->density() );
            scatter.setRandom( marker->placement() == MarkerSymbol::PLACEMENT_RANDOM );
            scatter.setRandomSeed( *marker->randomSeed() );
            cx = scatter.push( workingSet, cx );
        }

        if ( clampRequired )
        {
            ClampFilter clamp;
            clamp.setIgnoreZ( altitude->clamping() == AltitudeSymbol::CLAMP_TO_TERRAIN );
            cx = clamp.push( workingSet, cx );
            clampRequired = false;
        }

        SubstituteModelFilter sub( style );
        sub.setClustering( *_options.clustering() );
        if ( marker->scale().isSet() )
            sub.setModelMatrix( osg::Matrixd::scale( *marker->scale() ) );

        cx = sub.push( workingSet, cx );

        osg::Node* node = sub.getNode();
        if ( node )
            resultGroup->addChild( node );
    }

    // extruded geometry
    if ( extrusion && ( line || polygon ) )
    {
        if ( clampRequired )
        {
            ClampFilter clamp;
            clamp.setIgnoreZ( altitude->clamping() == AltitudeSymbol::CLAMP_TO_TERRAIN );
            if ( extrusion->heightReference() == ExtrusionSymbol::HEIGHT_REFERENCE_MSL )
                clamp.setMaxZAttributeName( "__max_z");
            cx = clamp.push( workingSet, cx );
            clampRequired = false;
        }

        ExtrudeGeometryFilter extrude;
        if ( extrusion )
        {
            if ( extrusion->height().isSet() )
                extrude.setExtrusionHeight( *extrusion->height() );
            if ( extrusion->heightExpression().isSet() )
                extrude.setExtrusionExpr( *extrusion->heightExpression() );
            
            //extrude.setHeightReferenceFrame( *extrusion->heightReference() );
            if ( extrusion->heightReference() == ExtrusionSymbol::HEIGHT_REFERENCE_MSL )
                extrude.setHeightOffsetExpression( NumericExpression("[__max_z]") );
            extrude.setFlatten( *extrusion->flatten() );
        }
        if ( polygon )
        {
            extrude.setColor( polygon->fill()->color() );
        }

        osg::Node* node = extrude.push( workingSet, cx );
        if ( node )
            resultGroup->addChild( node );
    }

    // simple geometry
    else if ( point || line || polygon )
    {
        if ( clampRequired )
        {
            ClampFilter clamp;
            clamp.setIgnoreZ( altitude->clamping() == AltitudeSymbol::CLAMP_TO_TERRAIN );
            cx = clamp.push( workingSet, cx );
            clampRequired = false;
        }

        BuildGeometryFilter filter( style );
        if ( _options.maxGranularity().isSet() )
            filter.maxGranularity() = *_options.maxGranularity();
        if ( _options.mergeGeometry().isSet() )
            filter.mergeGeometry() = *_options.mergeGeometry();
        if ( _options.featureName().isSet() )
            filter.featureName() = *_options.featureName();
        cx = filter.push( workingSet, cx );

        osg::Node* node = filter.getNode();
        if ( node )
            resultGroup->addChild( node );
    }

    if ( text )
    {
        if ( clampRequired )
        {
            ClampFilter clamp;
            clamp.setIgnoreZ( altitude->clamping() == AltitudeSymbol::CLAMP_TO_TERRAIN );
            cx = clamp.push( workingSet, cx );
            clampRequired = false;
        }

        BuildTextFilter filter( style );
        cx = filter.push( workingSet, cx );

        osg::Node* node = filter.takeNode();
        if ( node )
            resultGroup->addChild( node );
    }

    //else // insufficient symbology
    //{
    //    OE_WARN << LC << "Insufficient symbology; no geometry created" << std::endl;
    //}

    // install the localization transform if necessary.
    if ( cx.hasReferenceFrame() )
    {
        osg::MatrixTransform* delocalizer = new osg::MatrixTransform( cx.inverseReferenceFrame() );
        delocalizer->addChild( resultGroup.get() );
        resultGroup = delocalizer;
    }

    resultGroup->getOrCreateStateSet()->setMode( GL_BLEND, 1 );

    //osgDB::writeNodeFile( *(resultGroup.get()), "out.osg" );

    return resultGroup.release();
}
Ejemplo n.º 2
0
FilterContext
BuildGeometryFilter::push( FeatureList& input, const FilterContext& context )
{
    reset();

    OE_DEBUG << LC 
        << context.toString() << std::endl;

    bool ok = true;
    for( FeatureList::iterator i = input.begin(); i != input.end(); i++ )
        if ( !push( i->get(), context ) )
            ok = false;

    // In a feature class with one point-per-feature, you end up with one geometry per point,
    // which results is (a) very bad performance and (b) geometries with a zero bbox that therefore
    // don't draw. This is not a total solution (won't work for a single point, isn't friendly for
    // doing feature-selection, etc.) but is a workable temporary fix. In the future we're going
    // to replace this filter anyway with something more highly optimized (a la osgGIS).
    //
    // however...seems that MERGE_GEOMETRY destroys almost everything except for points!!
    if ( _mergeGeometry == true )
    {
        osgUtil::Optimizer optimizer;
        optimizer.optimize( _geode.get(), osgUtil::Optimizer::MERGE_GEOMETRY );
    }

    if ( ok )
    {
        if ( !_style.empty() && _geode.valid() )
        {
            // could optimize this to only happen is lines or points were created ..
            const LineSymbol* lineSymbol = _style.getSymbol<LineSymbol>();
            float size = 1.0;
            if (lineSymbol)
                size = lineSymbol->stroke()->width().value();

            _geode->getOrCreateStateSet()->setAttribute( new osg::Point(size), osg::StateAttribute::ON );
            _geode->getOrCreateStateSet()->setAttribute( new osg::LineWidth(size), osg::StateAttribute::ON );

            const PointSymbol* pointSymbol = _style.getSymbol<PointSymbol>();
            if ( pointSymbol && pointSymbol->size().isSet() )
                _geode->getOrCreateStateSet()->setAttribute( 
                    new osg::Point( *pointSymbol->size() ), osg::StateAttribute::ON );
        }

        _result = _geode.release();

        if ( context.hasReferenceFrame() )
        {
            osg::MatrixTransform* delocalizer = new osg::MatrixTransform( context.inverseReferenceFrame() );
            delocalizer->addChild( _result.get() );
            _result = delocalizer;
        }
    }
    else
    {
        _result = 0L;
    }

    FilterContext outCx( context );
    outCx.setReferenceFrame( osg::Matrixd::identity() ); // clear the ref frame.
    return outCx;
}
Ejemplo n.º 3
0
osg::Node*
Graticule::createGridLevel( unsigned int levelNum ) const
{
    if ( !_map->isGeocentric() )
    {
        OE_WARN << "Graticule: only supports geocentric maps" << std::endl;
        return 0L;
    }

    Graticule::Level level;
    if ( !getLevel( levelNum, level ) )
        return 0L;

    OE_DEBUG << "Graticule: creating grid level " << levelNum << std::endl;

    osg::Group* group = new osg::Group();

    const Profile* mapProfile = _map->getProfile();
    const GeoExtent& pex = mapProfile->getExtent();

    double tw = pex.width() / (double)level._cellsX;
    double th = pex.height() / (double)level._cellsY;

    for( unsigned int x=0; x<level._cellsX; ++x )
    {
        for( unsigned int y=0; y<level._cellsY; ++y )
        {
            GeoExtent tex(
                mapProfile->getSRS(),
                pex.xMin() + tw * (double)x,
                pex.yMin() + th * (double)y,
                pex.xMin() + tw * (double)(x+1),
                pex.yMin() + th * (double)(y+1) );

            double ox = level._lineWidth;
            double oy = level._lineWidth;

            Geometry* geom = createCellGeometry( tex, level._lineWidth, pex, _map->isGeocentric() );

            Feature* feature = new Feature();
            feature->setGeometry( geom );
            FeatureList features;
            features.push_back( feature );

            FilterContext cx;
            cx.profile() = new FeatureProfile( tex );
            cx.isGeocentric() = _map->isGeocentric();

            if ( _map->isGeocentric() )
            {
                // We need to make sure that on a round globe, the points are sampled such that
                // long segments follow the curvature of the earth.
                ResampleFilter resample;
                resample.maxLength() = tex.width() / 10.0;
                resample.perturbationThreshold() = level._lineWidth/1000.0;
                cx = resample.push( features, cx );
            }

            TransformFilter xform( mapProfile->getSRS() );
            xform.setMakeGeocentric( _map->isGeocentric() );
            cx = xform.push( features, cx );

            Bounds bounds = feature->getGeometry()->getBounds();
            double exDist = bounds.radius()/2.0;

            osg::Node* cellVolume = createVolume(
                feature->getGeometry(),
                -exDist,
                exDist*2,
                cx );

            osg::Node* child = cellVolume;

            if ( cx.hasReferenceFrame() )
            {
                osg::MatrixTransform* xform = new osg::MatrixTransform( cx.inverseReferenceFrame() );
                xform->addChild( child );

                // the transform matrix here does NOT include a rotation, so we need to get the normal
                // for the cull plane callback.
                osg::Vec3d normal = xform->getBound().center();
                xform->setCullCallback( new CullPlaneCallback( normal ) );

                child = xform;
            }

            group->addChild( child );
        }
    }

    // organize it for better culling
    osgUtil::Optimizer opt;
    opt.optimize( group, osgUtil::Optimizer::SPATIALIZE_GROUPS );

    osg::Node* result = group;

    if ( levelNum+1 < getNumLevels() )
    {
        Graticule::Level nextLevel;
        if ( getLevel( levelNum+1, nextLevel ) )
        {
            osg::PagedLOD* plod = new osg::PagedLOD();
            plod->addChild( group, nextLevel._maxRange, level._maxRange );
            std::stringstream buf;
            buf << levelNum+1 << "_" << getID() << "." << GRID_MARKER << "." << GRATICLE_EXTENSION;
            std::string bufStr = buf.str();
            plod->setFileName( 1, bufStr );
            plod->setRange( 1, 0, nextLevel._maxRange );
            result = plod;
        }
    }

    return result;
}
Ejemplo n.º 4
0
    virtual osg::Node* createNodeForStyle(
        const Symbology::Style* style,
        const FeatureList& features,
        FeatureSymbolizerContext* context,
        osg::Node** out_newNode)
    {
        // A processing context to use with the filters:
        FilterContext contextFilter;
        contextFilter.profile() = context->getModelSource()->getFeatureSource()->getFeatureProfile();

        // Transform them into the map's SRS:
        TransformFilter xform( context->getModelSource()->getMap()->getProfile()->getSRS() );
        xform.setMakeGeocentric( context->getModelSource()->getMap()->isGeocentric() );
        xform.setLocalizeCoordinates( true );

        const FeatureLabelModelOptions* options = dynamic_cast<const FeatureLabelModelOptions*>(
            context->getModelSource()->getFeatureModelOptions());

        FeatureList featureList;
        for (FeatureList::const_iterator it = features.begin(); it != features.end(); ++it)
            featureList.push_back(osg::clone((*it).get(),osg::CopyOp::DEEP_COPY_ALL));

        xform.setHeightOffset( options->heightOffset().value() );
        contextFilter = xform.push( featureList, contextFilter );        
        
        //Make some labels
        osg::ref_ptr<const TextSymbol> textSymbol = style->getSymbol<TextSymbol>();
        //Use a default symbol if we have no text symbol
        if (!textSymbol) textSymbol = new TextSymbol();
        osg::Node* labels = NULL;
        if (textSymbol.valid())
        {
            BuildTextOperator textOperator;
            labels = textOperator(featureList, textSymbol.get(), contextFilter);
        }

        osg::Node* result = labels;

        // If the context specifies a reference frame, apply it to the resulting model.
        // Q: should this be here, or should the reference frame matrix be passed to the Symbolizer?
        // ...probably the latter.
        if ( contextFilter.hasReferenceFrame() )
        {
            osg::MatrixTransform* delocalizer = new osg::MatrixTransform(
                contextFilter.inverseReferenceFrame() );
            delocalizer->addChild( labels );
            result = delocalizer;
        }

        // Apply an LOD if required:
        if ( options->minRange().isSet() || options->maxRange().isSet() )
        {
            osg::LOD* lod = new osg::LOD();
            lod->addChild( result, options->minRange().value(), options->maxRange().value() );
            result = lod;
        }

        // set the output node if necessary:
        if ( out_newNode )
            *out_newNode = result;

        return result;
    }