C++ TextSymbol::halo方法代码示例

void
MGRSGraticule::setUpDefaultStyles()
{
    if (!options().gzdStyle().isSet())
    {
        LineSymbol* line = options().gzdStyle()->getOrCreate<LineSymbol>();
        line->stroke()->color() = Color::Gray;
        line->stroke()->width() = 1.0;
        line->tessellation() = 20;

        TextSymbol* text = options().gzdStyle()->getOrCreate<TextSymbol>();
        text->fill()->color() = Color(Color::White, 0.3f);
        text->halo()->color() = Color(Color::Black, 0.2f);
        text->alignment() = TextSymbol::ALIGN_CENTER_CENTER;
    }

    if (!options().sqidStyle().isSet())
    {
        LineSymbol* line = options().sqidStyle()->getOrCreate<LineSymbol>();
        line->stroke()->color() = Color(Color::White, 0.5f);
        line->stroke()->stipplePattern() = 0x1111;

        TextSymbol* text = options().sqidStyle()->getOrCreate<TextSymbol>();
        text->fill()->color() = Color(Color::White, 0.3f);
        text->halo()->color() = Color(Color::Black, 0.1f);
        text->alignment() = TextSymbol::ALIGN_CENTER_CENTER;
    }
}

/**
 * Creates a field schema that we'll later use as a labeling template for
 * TrackNode instances.
 */
void
createFieldSchema( TrackNodeFieldSchema& schema )
{
    // draw the track name above the icon:
    TextSymbol* nameSymbol = new TextSymbol();
    nameSymbol->pixelOffset()->set( 0, 2+ICON_SIZE/2 );
    nameSymbol->alignment() = TextSymbol::ALIGN_CENTER_BOTTOM;
    nameSymbol->halo()->color() = Color::Black;
    nameSymbol->size() = nameSymbol->size()->eval() + 2.0f;
    schema[FIELD_NAME] = TrackNodeField(nameSymbol, false); // false => static label (won't change after set)

    // draw the track coordinates below the icon:
    TextSymbol* posSymbol = new TextSymbol();
    posSymbol->pixelOffset()->set( 0, -2-ICON_SIZE/2 );
    posSymbol->alignment() = TextSymbol::ALIGN_CENTER_TOP;
    posSymbol->fill()->color() = Color::Yellow;
    posSymbol->size() = posSymbol->size()->eval() - 2.0f;
    schema[FIELD_POSITION] = TrackNodeField(posSymbol, true); // true => may change at runtime

    // draw some other field to the left:
    TextSymbol* numberSymbol = new TextSymbol();
    numberSymbol->pixelOffset()->set( -2-ICON_SIZE/2, 0 );
    numberSymbol->alignment() = TextSymbol::ALIGN_RIGHT_CENTER;
    schema[FIELD_NUMBER] = TrackNodeField(numberSymbol, false);
}

GraticuleLabelingEngine::GraticuleLabelingEngine(const SpatialReference* srs)
{
    _srs = srs;

    // Set up the symbology for x-axis labels
    TextSymbol* xText = _xLabelStyle.getOrCreate<TextSymbol>();
    xText->alignment() = TextSymbol::ALIGN_CENTER_BOTTOM;
    xText->halo()->color().set(0, 0, 0, 1);
    xText->declutter() = false;

    // Set up the symbology for y-axis labels
    TextSymbol* yText = _yLabelStyle.getOrCreate<TextSymbol>();
    yText->alignment() = TextSymbol::ALIGN_LEFT_BOTTOM;
    yText->halo()->color().set(0, 0, 0, 1);
    yText->declutter() = false;
}

void createTrackSchema(TrackNodeFieldSchema& schema)
{
    // draw the track name above the icon:
    TextSymbol* nameSymbol = new TextSymbol();
    nameSymbol->pixelOffset()->set( 0, 2+TRACK_ICON_SIZE/2 );
    nameSymbol->alignment() = TextSymbol::ALIGN_CENTER_BOTTOM;
    nameSymbol->halo()->color() = Color::Black;
    schema[TRACK_FIELD_NAME] = TrackNodeField(nameSymbol, false);
}

MGRSGraticule::MGRSGraticule( MapNode* mapNode ) :
    UTMGraticule( 0L )
{
    _mapNode = mapNode;
    init();

    if ( !_options->secondaryStyle().isSet() )
    {
        LineSymbol* line = _options->secondaryStyle()->getOrCreate<LineSymbol>();
        line->stroke()->color() = Color(Color::White, 0.5f);
        line->stroke()->stipple() = 0x1111;

        TextSymbol* text = _options->secondaryStyle()->getOrCreate<TextSymbol>();
        text->fill()->color() = Color(Color::White, 0.3f);
        text->halo()->color() = Color(Color::Black, 0.1f);
        text->alignment() = TextSymbol::ALIGN_CENTER_CENTER;
    }

    _minDepthOffset = DepthOffsetUtils::createMinOffsetUniform();
    _minDepthOffset->set( 11000.0f );
}

//.........这里部分代码省略.........
    if (args.read("--shadows"))
    {
        int unit;
        if ( mapNode->getTerrainEngine()->getResources()->reserveTextureImageUnit(unit, "ShadowCaster") )
        {
            ShadowCaster* caster = new ShadowCaster();
            caster->setTextureImageUnit( unit );
            caster->setLight( view->getLight() );
            caster->getShadowCastingGroup()->addChild( mapNode );
            if ( mapNode->getNumParents() > 0 )
            {
                insertGroup(caster, mapNode->getParent(0));
            }
            else
            {
                caster->addChild(mapNode);
                root = caster;
            }
        }
    }

    // Loading KML from the command line:
    if ( !kmlFile.empty() )
    {
        KMLOptions kml_options;
        kml_options.declutter() = true;

        // set up a default icon for point placemarks:
        IconSymbol* defaultIcon = new IconSymbol();
        defaultIcon->url()->setLiteral(KML_PUSHPIN_URL);
        kml_options.defaultIconSymbol() = defaultIcon;

        TextSymbol* defaultText = new TextSymbol();
        defaultText->halo() = Stroke(0.3,0.3,0.3,1.0);
        kml_options.defaultTextSymbol() = defaultText;

        osg::Node* kml = KML::load( URI(kmlFile), mapNode, kml_options );
        if ( kml )
        {
            if (kmlUI)
            {
                Control* c = AnnotationGraphControlFactory().create(kml, view);
                if ( c )
                {
                    c->setVertAlign( Control::ALIGN_TOP );
                    canvas->addControl( c );
                }
            }
            root->addChild( kml );
        }
        else
        {
            OE_NOTICE << "Failed to load " << kmlFile << std::endl;
        }
    }

    //// Configure the de-cluttering engine for labels and annotations:
    //if ( !screenSpaceLayoutConf.empty() )
    //{
    //    ScreenSpaceLayout::setOptions( ScreenSpaceLayoutOptions(screenSpaceLayoutConf) );
    //}

    // Configure the mouse coordinate readout:
    if ( useCoords )
    { 
        LabelControl* readout = new LabelControl();

bool
SLDReader::readStyleFromCSSParams( const Config& conf, Style& sc )
{
    sc.setName( conf.key() );

    LineSymbol*      line      = 0L;
    PolygonSymbol*   polygon   = 0L;
    PointSymbol*     point     = 0L;
    TextSymbol*      text      = 0L;
    ExtrusionSymbol* extrusion = 0L;
    MarkerSymbol*    marker     = 0L;
    AltitudeSymbol*  altitude  = 0L;

    for(Properties::const_iterator p = conf.attrs().begin(); p != conf.attrs().end(); p++ )
    {
        if ( p->first == CSS_STROKE )
        {
            if (!line) line = sc.getOrCreateSymbol<LineSymbol>();
            line->stroke()->color() = htmlColorToVec4f( p->second );
        }
        else if ( p->first == CSS_STROKE_OPACITY )
        {
            if (!line) line = sc.getOrCreateSymbol<LineSymbol>();
            line->stroke()->color().a() = as<float>( p->second, 1.0f );
        }
        else if ( p->first == CSS_STROKE_WIDTH )
        {
            if (!line) line = sc.getOrCreateSymbol<LineSymbol>();
            line->stroke()->width() = as<float>( p->second, 1.0f );
        }
        else if ( p->first == CSS_STROKE_LINECAP )
        {
            if (!line) line = sc.getOrCreateSymbol<LineSymbol>();
            parseLineCap( p->second, line->stroke()->lineCap() );
        }
        else if ( p->first == CSS_FILL )
        {
            if (!polygon) polygon = sc.getOrCreateSymbol<PolygonSymbol>();
            polygon->fill()->color() = htmlColorToVec4f( p->second );

            if ( !point ) point = sc.getOrCreateSymbol<PointSymbol>();
            point->fill()->color() = htmlColorToVec4f( p->second );

            if ( !text ) text = new TextSymbol();
            text->fill()->color() = htmlColorToVec4f( p->second );
        }
        else if ( p->first == CSS_FILL_OPACITY )
        {
            if (!polygon) polygon = sc.getOrCreateSymbol<PolygonSymbol>();
            polygon->fill()->color().a() = as<float>( p->second, 1.0f );

            if (!polygon) polygon = sc.getOrCreateSymbol<PolygonSymbol>();
            point->fill()->color().a() = as<float>( p->second, 1.0f );

            if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
            text->fill()->color().a() = as<float>( p->second, 1.0f );
        }
        else if (p->first == CSS_POINT_SIZE)
        {
            if ( !point ) point = sc.getOrCreateSymbol<PointSymbol>();
            point->size() = as<float>(p->second, 1.0f);
        }
        else if (p->first == CSS_TEXT_SIZE)
        {
            if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
            text->size() = as<float>(p->second, 32.0f);
        }
        else if (p->first == CSS_TEXT_FONT)
        {
            if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
            text->font() = p->second;
        }
        else if (p->first == CSS_TEXT_HALO)
        {
            if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
            text->halo()->color() = htmlColorToVec4f( p->second );
        }
        //else if (p->first == CSS_TEXT_ATTRIBUTE)
        //{
        //    if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
        //    text->attribute() = p->second;
        //}
        else if (p->first == CSS_TEXT_ROTATE_TO_SCREEN)
        {
            if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
            if (p->second == "true") text->rotateToScreen() = true;
            else if (p->second == "false") text->rotateToScreen() = false;
        }
        else if (p->first == CSS_TEXT_SIZE_MODE)
        {
            if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
            if (p->second == "screen") text->sizeMode() = TextSymbol::SIZEMODE_SCREEN;
            else if (p->second == "object") text->sizeMode() = TextSymbol::SIZEMODE_OBJECT;
        }
        else if (p->first == CSS_TEXT_REMOVE_DUPLICATE_LABELS)
        {
            if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
            if (p->second == "true") text->removeDuplicateLabels() = true;
            else if (p->second == "false") text->removeDuplicateLabels() = false;
        } 
//.........这里部分代码省略.........

void
UTMGraticule::rebuild()
{
    if (_root.valid() == false)
        return;

    osg::ref_ptr<const Map> map;
    if (!_map.lock(map))
        return;

    // clear everything out
    _root->removeChildren( 0, _root->getNumChildren() );

    // requires a geocentric map
    if ( !map->isGeocentric() )
    {
        OE_WARN << LC << "Projected map mode is not yet supported" << std::endl;
        return;
    }

    const Profile* mapProfile = map->getProfile();

    _profile = Profile::create(
        mapProfile->getSRS(),
        mapProfile->getExtent().xMin(),
        mapProfile->getExtent().yMin(),
        mapProfile->getExtent().xMax(),
        mapProfile->getExtent().yMax(),
        8, 4 );

    _featureProfile = new FeatureProfile(_profile->getSRS());

    //todo: do this right..
    osg::StateSet* set = this->getOrCreateStateSet();
    GLUtils::setLighting(set, 0);
    set->setMode( GL_BLEND, 1 );
    set->setMode( GL_CLIP_DISTANCE0, 1 );

    // set up default options if the caller did not supply them
    if ( !options().gzdStyle().isSet() )
    {
        options().gzdStyle() = Style();

        LineSymbol* line = options().gzdStyle()->getOrCreate<LineSymbol>();
        line->stroke()->color() = Color::Gray;
        line->stroke()->width() = 1.0;
        line->tessellation() = 20;

        TextSymbol* text = options().gzdStyle()->getOrCreate<TextSymbol>();
        text->fill()->color() = Color(Color::White, 0.3f);
        text->halo()->color() = Color(Color::Black, 0.2f);
        text->alignment() = TextSymbol::ALIGN_CENTER_CENTER;
    }
    
    // initialize the UTM sector tables for this profile.
    _utmData.rebuild(_profile.get());

    // now build the lateral tiles for the GZD level.
    for( UTMData::SectorTable::iterator i = _utmData.sectorTable().begin(); i != _utmData.sectorTable().end(); ++i )
    {
        osg::Node* tile = _utmData.buildGZDTile(i->first, i->second, options().gzdStyle().get(), _featureProfile.get(), map.get());
        if ( tile )
            _root->addChild( tile );
    }
}

void
UTMGraticule::init()
{
    if ( !_mapNode.valid() )
    {
        OE_WARN << LC << "Illegal NULL map node" << std::endl;
        return;
    }

    if ( !_mapNode->isGeocentric() )
    {
        OE_WARN << LC << "Projected map mode is not yet supported" << std::endl;
        return;
    }

    // safely generate a unique ID for this graticule:
    _id = Registry::instance()->createUID();
    {
        Threading::ScopedMutexLock lock( s_graticuleMutex );
        s_graticuleRegistry[_id] = this;
    }

    const Profile* mapProfile = _mapNode->getMap()->getProfile();

    _profile = Profile::create(
        mapProfile->getSRS(),
        mapProfile->getExtent().xMin(),
        mapProfile->getExtent().yMin(),
        mapProfile->getExtent().xMax(),
        mapProfile->getExtent().yMax(),
        8, 4 );

    _featureProfile = new FeatureProfile(_profile->getSRS());

    //todo: do this right..
    osg::StateSet* set = this->getOrCreateStateSet();
    set->setMode( GL_LIGHTING, 0 );
    set->setMode( GL_BLEND, 1 );

    // set up default options if the caller did not supply them
    if ( !_options.isSet() )
    {
        _options->primaryStyle()= Style();

        LineSymbol* line = _options->primaryStyle()->getOrCreate<LineSymbol>();
        line->stroke()->color() = Color::Gray;
        line->stroke()->width() = 1.0;
        line->tessellation() = 20;

        AltitudeSymbol* alt = _options->primaryStyle()->getOrCreate<AltitudeSymbol>();
        //alt->verticalOffset() = NumericExpression(4900.0);

        TextSymbol* text = _options->primaryStyle()->getOrCreate<TextSymbol>();
        text->fill()->color() = Color(Color::White, 0.3f);
        text->halo()->color() = Color(Color::Black, 0.2f);
        text->alignment() = TextSymbol::ALIGN_CENTER_CENTER;
    }

    // make the shared depth attr:
    _depthAttribute = new osg::Depth(osg::Depth::LEQUAL,0,1,false);

    // this will intialize the graph.
    rebuild();
}

//.........这里部分代码省略.........
        featureOptions.url() = "../data/world.shp";
    }
    else
    {
        // the --mem options tells us to just make an in-memory geometry:
        Ring* line = new Ring();
        line->push_back( osg::Vec3d(-60, 20, 0) );
        line->push_back( osg::Vec3d(-120, 20, 0) );
        line->push_back( osg::Vec3d(-120, 60, 0) );
        line->push_back( osg::Vec3d(-60, 60, 0) );
        featureOptions.geometry() = line;
    }

    // Define a style for the feature data. Since we are going to render the
    // vectors as lines, configure the line symbolizer:
    Style style;

    LineSymbol* ls = style.getOrCreateSymbol<LineSymbol>();
    ls->stroke()->color() = Color::Yellow;
    ls->stroke()->width() = 2.0f;

    // That's it, the map is ready; now create a MapNode to render the Map:
    MapNodeOptions mapNodeOptions;
    mapNodeOptions.enableLighting() = false;
    MapNode* mapNode = new MapNode( map, mapNodeOptions );

    osg::Group* root = new osg::Group();
    root->addChild( mapNode );
    viewer.setSceneData( root );
    viewer.setCameraManipulator( new EarthManipulator() );

    // Process cmdline args
    MapNodeHelper().parse(mapNode, arguments, &viewer, root, new LabelControl("Features Demo"));
   
    if (useStencil)
    {
        FeatureStencilModelOptions stencilOptions;
        stencilOptions.featureOptions() = featureOptions;
        stencilOptions.styles() = new StyleSheet();
        stencilOptions.styles()->addStyle( style );
        stencilOptions.enableLighting() = false;
        stencilOptions.depthTestEnabled() = false;
        ls->stroke()->width() = 0.1f;
        map->addModelLayer( new ModelLayer("my features", stencilOptions) );
    }
    else if (useRaster)
    {
        AGGLiteOptions rasterOptions;
        rasterOptions.featureOptions() = featureOptions;
        rasterOptions.styles() = new StyleSheet();
        rasterOptions.styles()->addStyle( style );
        map->addImageLayer( new ImageLayer("my features", rasterOptions) );
    }
    else //if (useGeom || useOverlay)
    {
        FeatureGeomModelOptions geomOptions;
        geomOptions.featureOptions() = featureOptions;
        geomOptions.styles() = new StyleSheet();
        geomOptions.styles()->addStyle( style );
        geomOptions.enableLighting() = false;

        ModelLayerOptions layerOptions( "my features", geomOptions );
        map->addModelLayer( new ModelLayer(layerOptions) );
    }

    if ( useLabels )
    {
        // set up symbology for drawing labels. We're pulling the label
        // text from the name attribute, and its draw priority from the
        // population attribute.
        Style labelStyle;

        TextSymbol* text = labelStyle.getOrCreateSymbol<TextSymbol>();
        text->content() = StringExpression( "[cntry_name]" );
        text->priority() = NumericExpression( "[pop_cntry]" );
        text->removeDuplicateLabels() = true;
        text->size() = 16.0f;
        text->alignment() = TextSymbol::ALIGN_CENTER_CENTER;
        text->fill()->color() = Color::White;
        text->halo()->color() = Color::DarkGray;

        // and configure a model layer:
        FeatureGeomModelOptions geomOptions;
        geomOptions.featureOptions() = featureOptions;
        geomOptions.styles() = new StyleSheet();
        geomOptions.styles()->addStyle( labelStyle );

        map->addModelLayer( new ModelLayer("labels", geomOptions) );
    }

    if ( !useStencil )
        viewer.getCamera()->addCullCallback( new osgEarth::Util::AutoClipPlaneCullCallback(mapNode) );

    // add some stock OSG handlers:
    viewer.addEventHandler(new osgViewer::StatsHandler());
    viewer.addEventHandler(new osgViewer::WindowSizeHandler());
    viewer.addEventHandler(new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()));

    return viewer.run();
}

void
MapInspectorUI::addTerrainLayer(TerrainLayer* layer,
                                MapNode*      mapNode)
{
    const Color colors[6] = {
        Color::White,
        Color::Yellow,
        Color::Cyan,
        Color::Lime,
        Color::Red,
        Color::Magenta
    };
    Color color = colors[(int)layer->getUID()%6];

    osg::ref_ptr<MultiGeometry> collection = new MultiGeometry();

    const DataExtentList& exlist = layer->getDataExtents();
    if (!exlist.empty())
    {
        for(DataExtentList::const_iterator i = exlist.begin(); i != exlist.end(); ++i)
        {
            const DataExtent& e = *i;
            Polygon* p = new Polygon();
            p->push_back( e.xMin(), e.yMin() );
            p->push_back( e.xMax(), e.yMin() );
            p->push_back( e.xMax(), e.yMax() );
            p->push_back( e.xMin(), e.yMax() );
            collection->add( p );
        }

        // poly:
        {
            Style style;
            style.getOrCreate<LineSymbol>()->stroke()->color() = color;
            style.getOrCreate<LineSymbol>()->stroke()->width() = 2;
            style.getOrCreate<AltitudeSymbol>()->clamping() = AltitudeSymbol::CLAMP_TO_TERRAIN;
            style.getOrCreate<AltitudeSymbol>()->technique() = AltitudeSymbol::TECHNIQUE_DRAPE;
            style.getOrCreate<RenderSymbol>()->lighting() = false;

            Feature* feature = new Feature(collection.get(), layer->getProfile()->getSRS(), style);
            FeatureNode* node = new FeatureNode( mapNode, feature );
            _annos->addChild( node );
        }

        // label:
        std::string text = 
            !layer->getName().empty()? layer->getName() :
            Stringify() << "Layer " << layer->getUID();

        {
            Style style;
            TextSymbol* ts = style.getOrCreate<TextSymbol>();
            ts->halo()->color().set(0,0,0,1);
            ts->declutter() = true;
            ts->alignment() = TextSymbol::ALIGN_CENTER_CENTER;
        
            osg::Vec2d center = collection->getBounds().center2d();
            GeoPoint position(layer->getProfile()->getSRS(), center.x(), center.y(), 0.0, ALTMODE_ABSOLUTE);

            LabelNode* label = new LabelNode(mapNode, position, text, style);
            _annos->addChild( label );
        }

        unsigned r = this->getNumRows();
        setControl(0, r, new ui::LabelControl(text, color));
    }
}

//
// NOTE: run this sample from the repo/tests directory.
//
int main(int argc, char** argv)
{
    osg::ArgumentParser arguments(&argc,argv);

    bool useRaster  = arguments.read("--rasterize");
    bool useOverlay = arguments.read("--overlay");
    bool useStencil = arguments.read("--stencil");
    bool useMem     = arguments.read("--mem");
    bool useLabels  = arguments.read("--labels");

    osgViewer::Viewer viewer(arguments);

    // Start by creating the map:
    Map* map = new Map();

    // Start with a basemap imagery layer; we'll be using the GDAL driver
    // to load a local GeoTIFF file:
    GDALOptions basemapOpt;
    basemapOpt.url() = "../data/world.tif";
    map->addImageLayer( new ImageLayer( ImageLayerOptions("basemap", basemapOpt) ) );

    // Next we add a feature layer. First configure a feature driver to 
    // load the vectors from a shapefile:
    OGRFeatureOptions featureOpt;
    if ( !useMem )
    {
        featureOpt.url() = "../data/usa.shp";
    }
    else
    {
        Ring* line = new Ring();
        line->push_back( osg::Vec3d(-60, 20, 0) );
        line->push_back( osg::Vec3d(-120, 20, 0) );
        line->push_back( osg::Vec3d(-120, 60, 0) );
        line->push_back( osg::Vec3d(-60, 60, 0) );
        featureOpt.geometry() = line;
    }

    // Define a style for the feature data. Since we are going to render the
    // vectors as lines, configure the line symbolizer:
    Style style;

    LineSymbol* ls = style.getOrCreateSymbol<LineSymbol>();
    ls->stroke()->color() = osg::Vec4f( 1,1,0,1 ); // yellow
    ls->stroke()->width() = 2.0f;

    // Add some text labels.
    if ( useLabels )
    {
        TextSymbol* text = style.getOrCreateSymbol<TextSymbol>();
        text->provider() = "overlay";
        text->content() = StringExpression( "[name]" );
        text->priority() = NumericExpression( "[area]" );
        text->removeDuplicateLabels() = true;
        text->size() = 16.0f;
        text->fill()->color() = Color::White;
        text->halo()->color() = Color::DarkGray;
    }

    // That's it, the map is ready; now create a MapNode to render the Map:
    MapNodeOptions mapNodeOptions;
    mapNodeOptions.enableLighting() = false;

    MapNode* mapNode = new MapNode( map, mapNodeOptions );

    // Now we'll choose the AGG-Lite driver to render the features. By the way, the
    // feature data is actually polygons, so we override that to treat it as lines.
    // We apply the feature driver and set the style as well.
    if (useStencil)
    {
        FeatureStencilModelOptions worldOpt;
        worldOpt.featureOptions() = featureOpt;
        worldOpt.geometryTypeOverride() = Geometry::TYPE_LINESTRING;
        worldOpt.styles() = new StyleSheet();
        worldOpt.styles()->addStyle( style );
        worldOpt.enableLighting() = false;
        worldOpt.depthTestEnabled() = false;
        map->addModelLayer( new ModelLayer( "my features", worldOpt ) );
    }
    else if (useRaster)
    {
        AGGLiteOptions worldOpt;
        worldOpt.featureOptions() = featureOpt;
        worldOpt.geometryTypeOverride() = Geometry::TYPE_LINESTRING;
        worldOpt.styles() = new StyleSheet();
        worldOpt.styles()->addStyle( style );
        map->addImageLayer( new ImageLayer( ImageLayerOptions("world", worldOpt) ) );
    }
    else //if (useGeom || useOverlay)
    {
        FeatureGeomModelOptions worldOpt;
        worldOpt.featureOptions() = featureOpt;
        worldOpt.geometryTypeOverride() = Geometry::TYPE_LINESTRING;
        worldOpt.styles() = new StyleSheet();
        worldOpt.styles()->addStyle( style );
        worldOpt.enableLighting() = false;
        worldOpt.depthTestEnabled() = false;
//.........这里部分代码省略.........

void
UTMGraticule::rebuild()
{
    // clear everything out
    this->removeChildren( 0, this->getNumChildren() );

    // requires a map node
    if ( !getMapNode() )
    {
        return;
    }

    // requires a geocentric map
    if ( !getMapNode()->isGeocentric() )
    {
        OE_WARN << LC << "Projected map mode is not yet supported" << std::endl;
        return;
    }

    const Profile* mapProfile = getMapNode()->getMap()->getProfile();

    _profile = Profile::create(
        mapProfile->getSRS(),
        mapProfile->getExtent().xMin(),
        mapProfile->getExtent().yMin(),
        mapProfile->getExtent().xMax(),
        mapProfile->getExtent().yMax(),
        8, 4 );

    _featureProfile = new FeatureProfile(_profile->getSRS());

    //todo: do this right..
    osg::StateSet* set = this->getOrCreateStateSet();
    set->setMode( GL_LIGHTING, 0 );
    set->setMode( GL_BLEND, 1 );

    // set up default options if the caller did not supply them
    if ( !_options.isSet() )
    {
        _options->primaryStyle() = Style();

        LineSymbol* line = _options->primaryStyle()->getOrCreate<LineSymbol>();
        line->stroke()->color() = Color::Gray;
        line->stroke()->width() = 1.0;
        line->tessellation() = 20;

        AltitudeSymbol* alt = _options->primaryStyle()->getOrCreate<AltitudeSymbol>();

        TextSymbol* text = _options->primaryStyle()->getOrCreate<TextSymbol>();
        text->fill()->color() = Color(Color::White, 0.3f);
        text->halo()->color() = Color(Color::Black, 0.2f);
        text->alignment() = TextSymbol::ALIGN_CENTER_CENTER;
    }


    // rebuild the graph:
    _root = new DrapeableNode( getMapNode(), false );
    this->addChild( _root );

#if 0
    // set up depth offsetting.
    osg::StateSet* s = _root->getOrCreateStateSet();
    s->setAttributeAndModes( DepthOffsetUtils::getOrCreateProgram(), 1 );
    s->addUniform( DepthOffsetUtils::getIsNotTextUniform() );
    osg::Uniform* u = DepthOffsetUtils::createMinOffsetUniform();
    u->set( 10000.0f );
    s->addUniform( u );
#endif

    // build the base Grid Zone Designator (GZD) loolup table. This is a table
    // that maps the GZD string to its extent.
    static std::string s_gzdRows( "CDEFGHJKLMNPQRSTUVWX" );
    const SpatialReference* geosrs = _profile->getSRS()->getGeographicSRS();

    // build the lateral zones:
    for( unsigned zone = 0; zone < 60; ++zone )
    {
        for( unsigned row = 0; row < s_gzdRows.size(); ++row )
        {
            double yMaxExtra = row == s_gzdRows.size()-1 ? 4.0 : 0.0; // extra 4 deg for row X

            GeoExtent cellExtent(
                geosrs,
                -180.0 + double(zone)*6.0,
                -80.0  + row*8.0,
                -180.0 + double(zone+1)*6.0,
                -80.0  + double(row+1)*8.0 + yMaxExtra );

            _gzd[ Stringify() << (zone+1) << s_gzdRows[row] ] = cellExtent;
        }        
    }

    // the polar zones (UPS):
    _gzd["1Y"] = GeoExtent( geosrs, -180.0,  84.0,   0.0,  90.0 );
    _gzd["1Z"] = GeoExtent( geosrs,    0.0,  84.0, 180.0,  90.0 );
    _gzd["1A"] = GeoExtent( geosrs, -180.0, -90.0,   0.0, -80.0 );
    _gzd["1B"] = GeoExtent( geosrs,    0.0, -90.0, 180.0, -80.0 );

    // replace the "exception" zones in Norway and Svalbard
    _gzd["31V"] = GeoExtent( geosrs, 0.0, 56.0, 3.0, 64.0 );
//.........这里部分代码省略.........