C++ ArgumentParser::read方法代码示例

 RealizeOperation(osg::ArgumentParser& arguments, osg::StateSet* stateset) :
     osg::GraphicsOperation("RealizeOperation",false)
 {
     _stateset = stateset;
     _useModelViewAndProjectionUniforms = arguments.read("--mv");
     _useVertexAttributeAliasing = arguments.read("--va");
 }

void System::readArguments(osg::ArgumentParser &arguments)
{
    while (arguments.read("--machines", _machineFileName))
    {
    }

    while (arguments.read("--cache", _cacheFileName))
    {
    }
    while (arguments.read("--xodr", _xodrName))
    {
    }
}

bool readShaderArguments(osg::ArgumentParser& arguments, const std::string& option, osg::Program* program, const std::string& fallbackShaderFilename)
{
    bool shaderAssigned = false;
    std::string shaderFilename;
    while(arguments.read(option, shaderFilename))
    {
        osg::ref_ptr<osg::Shader> shader = osgDB::readRefShaderFile(shaderFilename);
        if (shader)
        {
            shaderAssigned = true;
            program->addShader(shader);
        }
        else
        {
            OSG_NOTICE<<"Unable to load shader file : "<<shaderFilename<<std::endl;
        }
    }

    if (shaderAssigned) return true;

    osg::ref_ptr<osg::Shader> shader = osgDB::readRefShaderFile(fallbackShaderFilename);
    if (shader)
    {
        shaderAssigned = true;
        program->addShader(shader);
        return true;
    }
    else
    {
        OSG_NOTICE<<"Unable to load shader file : "<<fallbackShaderFilename<<std::endl;
        return false;
    }
}

bool setUpStateSet(osg::ArgumentParser& arguments, osg::StateSet* stateset)
{
    osg::ref_ptr<osg::Program> program = new osg::Program;


    if (!readShaderArguments(arguments, "--vert", program.get(), "shaders/shaderpipeline.vert"))
    {
        return false;
    }

    if (!readShaderArguments(arguments, "--frag", program.get(), "shaders/shaderpipeline.frag"))
    {
        return false;
    }

    unsigned int maxTextureUnits = 1;
    while(arguments.read("--units", maxTextureUnits)) {}

    stateset->setAttribute(program);

    std::stringstream sstream;
    sstream<<maxTextureUnits;
    stateset->setDefine("GL_MAX_TEXTURE_UNITS", sstream.str());

    #define ADD_DEFINE(DEF) \
        sstream.str(""); \
        sstream<<DEF; \
        stateset->setDefine(#DEF, sstream.str());

    if (maxTextureUnits>0)
    {
        osg::ref_ptr<osg::Texture2D> fallbackTexture = new osg::Texture2D(createFallbackImage());
        fallbackTexture->setWrap(osg::Texture2D::WRAP_S, osg::Texture2D::CLAMP_TO_EDGE);
        fallbackTexture->setWrap(osg::Texture2D::WRAP_T, osg::Texture2D::CLAMP_TO_EDGE);
        fallbackTexture->setWrap(osg::Texture2D::WRAP_R, osg::Texture2D::CLAMP_TO_EDGE);
        fallbackTexture->setFilter(osg::Texture2D::MIN_FILTER, osg::Texture2D::LINEAR);
        fallbackTexture->setFilter(osg::Texture2D::MAG_FILTER, osg::Texture2D::LINEAR);
        for(unsigned int i=0; i<maxTextureUnits;++i)
        {
            stateset->setTextureAttribute(i, fallbackTexture.get());
        }

        ADD_DEFINE(GL_ALPHA);
        ADD_DEFINE(GL_INTENSITY);
        ADD_DEFINE(GL_LUMINANCE);
        ADD_DEFINE(GL_RED);
        ADD_DEFINE(GL_RG);
        ADD_DEFINE(GL_RGB);
        ADD_DEFINE(GL_RGBA);

    }

    osgDB::writeObjectFile(*stateset, "stateset.osgt");

    return true;
}

CompositeViewer::CompositeViewer(osg::ArgumentParser& arguments)
{
    constructorInit();

    std::string filename;
    bool readConfig = false;
    while (arguments.read("-c",filename))
    {
        readConfig = readConfiguration(filename) || readConfig;
    }

    while (arguments.read("--SingleThreaded")) setThreadingModel(SingleThreaded);
    while (arguments.read("--CullDrawThreadPerContext")) setThreadingModel(CullDrawThreadPerContext);
    while (arguments.read("--DrawThreadPerContext")) setThreadingModel(DrawThreadPerContext);
    while (arguments.read("--CullThreadPerCameraDrawThreadPerContext")) setThreadingModel(CullThreadPerCameraDrawThreadPerContext);

    osg::DisplaySettings::instance()->readCommandLine(arguments);
    osgDB::readCommandLine(arguments);
}

int
seed( osg::ArgumentParser& args )
{    
    //Read the min level
    unsigned int minLevel = 0;
    while (args.read("--min-level", minLevel));
    
    //Read the max level
    unsigned int maxLevel = 5;
    while (args.read("--max-level", maxLevel));
    

    std::vector< Bounds > bounds;
    // restrict packaging to user-specified bounds.    
    double xmin=DBL_MAX, ymin=DBL_MAX, xmax=DBL_MIN, ymax=DBL_MIN;
    while (args.read("--bounds", xmin, ymin, xmax, ymax ))
    {        
        Bounds b;
        b.xMin() = xmin, b.yMin() = ymin, b.xMax() = xmax, b.yMax() = ymax;
        bounds.push_back( b );
    }    

    //Read the cache override directory
    std::string cachePath;
    while (args.read("--cache-path", cachePath));

    //Read the cache type
    std::string cacheType;
    while (args.read("--cache-type", cacheType));

    bool verbose = args.read("--verbose");

    //Read in the earth file.
    osg::ref_ptr<osg::Node> node = osgDB::readNodeFiles( args );
    if ( !node.valid() )
        return usage( "Failed to read .earth file." );

    MapNode* mapNode = MapNode::findMapNode( node.get() );
    if ( !mapNode )
        return usage( "Input file was not a .earth file" );

    CacheSeed seeder;
    seeder.setMinLevel( minLevel );
    seeder.setMaxLevel( maxLevel );

    for (unsigned int i = 0; i < bounds.size(); i++)
    {
        GeoExtent extent(mapNode->getMapSRS(), bounds[i]);
        OE_DEBUG << "Adding extent " << extent.toString() << std::endl;
        seeder.addExtent( extent );
    }    
    if (verbose)
    {
        seeder.setProgressCallback(new ConsoleProgressCallback);
    }
    seeder.seed( mapNode->getMap() );

    return 0;
}

CompositeViewer::CompositeViewer(osg::ArgumentParser& arguments)
{
    constructorInit();

    arguments.getApplicationUsage()->addCommandLineOption("--SingleThreaded","Select SingleThreaded threading model for viewer.");
    arguments.getApplicationUsage()->addCommandLineOption("--CullDrawThreadPerContext","Select CullDrawThreadPerContext threading model for viewer.");
    arguments.getApplicationUsage()->addCommandLineOption("--DrawThreadPerContext","Select DrawThreadPerContext threading model for viewer.");
    arguments.getApplicationUsage()->addCommandLineOption("--CullThreadPerCameraDrawThreadPerContext","Select CullThreadPerCameraDrawThreadPerContext threading model for viewer.");

    arguments.getApplicationUsage()->addCommandLineOption("--run-on-demand","Set the run methods frame rate management to only rendering frames when required.");
    arguments.getApplicationUsage()->addCommandLineOption("--run-continuous","Set the run methods frame rate management to rendering frames continuously.");
    arguments.getApplicationUsage()->addCommandLineOption("--run-max-frame-rate","Set the run methods maximum permissable frame rate, 0.0 is default and switching off frame rate capping.");


    std::string filename;
    bool readConfig = false;
    while (arguments.read("-c",filename))
    {
        readConfig = readConfiguration(filename) || readConfig;
    }

    while (arguments.read("--SingleThreaded")) setThreadingModel(SingleThreaded);
    while (arguments.read("--CullDrawThreadPerContext")) setThreadingModel(CullDrawThreadPerContext);
    while (arguments.read("--DrawThreadPerContext")) setThreadingModel(DrawThreadPerContext);
    while (arguments.read("--CullThreadPerCameraDrawThreadPerContext")) setThreadingModel(CullThreadPerCameraDrawThreadPerContext);


    while(arguments.read("--run-on-demand")) {
        setRunFrameScheme(ON_DEMAND);
    }
    while(arguments.read("--run-continuous")) {
        setRunFrameScheme(CONTINUOUS);
    }

    double runMaxFrameRate;
    while(arguments.read("--run-max-frame-rate", runMaxFrameRate)) {
        setRunMaxFrameRate(runMaxFrameRate);
    }


    osg::DisplaySettings::instance()->readCommandLine(arguments);
    osgDB::readCommandLine(arguments);
}

int mainAdapterWidget(QApplication& a, osg::ArgumentParser& arguments) {
  // load the scene.
  osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
  if (!loadedModel) {
    std::cerr << arguments[0] << ": No data loaded." << std::endl;
    std::cout << "usage: " << arguments[0] << " [--mdi] nodefile" << std::endl;
    return 1;
  }

  std::cout << "Using AdapterWidget - QGLWidget subclassed to integrate with "
               "osgViewer using its embedded graphics window support."
            << std::endl;

  if (arguments.read("--mdi")) {
    std::cout << "Using ViewetQT MDI version" << std::endl;
    /*
         Following problems are found here:
         - miminize causes loaded model to disappear (some problem with Camera
       matrix? - clampProjectionMatrix is invalid)
         */
    ViewerQT* viewerWindow = new ViewerQT;
    viewerWindow->setCameraManipulator(new osgGA::TrackballManipulator);
    viewerWindow->setSceneData(loadedModel.get());

    QMainWindow* mw = new QMainWindow();
    QMdiArea* mdiArea = new QMdiArea(mw);
    mw->setCentralWidget(mdiArea);

    QMdiSubWindow* subWindow = mdiArea->addSubWindow(viewerWindow);
    subWindow->showMaximized();
    subWindow->setWindowTitle("New Window");
    mw->show();
  } else {
    ViewerQT* viewerWindow = new ViewerQT;
    viewerWindow->setCameraManipulator(new osgGA::TrackballManipulator);
    viewerWindow->setSceneData(loadedModel.get());
    viewerWindow->show();
  }

  a.connect(&a, SIGNAL(lastWindowClosed()), &a, SLOT(quit()));
  return a.exec();
}

int mainAdapterWidget(QApplication& a, osg::ArgumentParser& arguments)
{
    // load the scene.
    osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
    if (!loadedModel)
        {
            std::cout << arguments[0] <<": No data loaded." << std::endl;
            return 1;
        }
    
    std::cout<<"Using AdapterWidget - QGLWidget subclassed to integrate with osgViewer using its embedded graphics window support."<<std::endl;
    
    if (arguments.read("--CompositeViewer"))
        {
            CompositeViewerQT* viewerWindow = new CompositeViewerQT;

            unsigned int width = viewerWindow->width();
            unsigned int height = viewerWindow->height();
        
            {
                osgViewer::View* view1 = new osgViewer::View;
                view1->getCamera()->setGraphicsContext(viewerWindow->getGraphicsWindow());
                view1->getCamera()->setProjectionMatrixAsPerspective(30.0f, static_cast<double>(width)/static_cast<double>(height/2), 1.0, 1000.0);
                view1->getCamera()->setViewport(new osg::Viewport(0,0,width,height/2));
                view1->setCameraManipulator(new osgGA::TrackballManipulator);
                view1->setSceneData(loadedModel.get());
            
                viewerWindow->addView(view1);
            }
        
            {
                osgViewer::View* view2 = new osgViewer::View;
                view2->getCamera()->setGraphicsContext(viewerWindow->getGraphicsWindow());
                view2->getCamera()->setProjectionMatrixAsPerspective(30.0f, static_cast<double>(width)/static_cast<double>(height/2), 1.0, 1000.0);
                view2->getCamera()->setViewport(new osg::Viewport(0,height/2,width,height/2));
                view2->setCameraManipulator(new osgGA::TrackballManipulator);
                view2->setSceneData(loadedModel.get());
            
                viewerWindow->addView(view2);
            }

            viewerWindow->show();
        }
    else if (arguments.read("--mdi")) {
        std::cout<<"Using ViewetQT MDI version"<<std::endl;
        /*
          Following problems are found here:
          - miminize causes loaded model to disappear (some problem with Camera matrix? - clampProjectionMatrix is invalid)
        */
        ViewerQT* viewerWindow = new ViewerQT;
        viewerWindow->setCameraManipulator(new osgGA::TrackballManipulator);
        viewerWindow->setSceneData(loadedModel.get());
 
        QMainWindow* mw = new QMainWindow();
        QMdiArea* mdiArea = new QMdiArea(mw);
        mw->setCentralWidget(mdiArea);

        QMdiSubWindow *subWindow = mdiArea->addSubWindow(viewerWindow);
        subWindow->showMaximized();
        subWindow->setWindowTitle("New Window");
        mw->show();
    } else {
        ViewerQT* viewerWindow = new ViewerQT;

        viewerWindow->setCameraManipulator(new osgGA::TrackballManipulator);
        viewerWindow->setSceneData(loadedModel.get());

        viewerWindow->show();
    }    
    
    
    a.connect( &a, SIGNAL(lastWindowClosed()), &a, SLOT(quit()) );
   
    return a.exec();
}

/** Packages an image layer as a TMS folder. */
int
makeTMS( osg::ArgumentParser& args )
{
    // see if the user wants to override the type extension (imagery only)
    std::string extension = "png";
    args.read( "--ext", extension );

    // verbosity?
    bool verbose = !args.read( "--quiet" );

    // find a .earth file on the command line
    std::string earthFile = findArgumentWithExtension(args, ".earth");
    if ( earthFile.empty() )
        return usage( "Missing required .earth file" );

    // folder to which to write the TMS archive.
    std::string rootFolder;
    if ( !args.read( "--out", rootFolder ) )
        rootFolder = Stringify() << earthFile << ".tms_repo";

    // max level to which to generate
    unsigned maxLevel = ~0;
    args.read( "--max-level", maxLevel );

    // load up the map
    osg::ref_ptr<MapNode> mapNode = MapNode::load( args );
    if ( !mapNode.valid() )
        return usage( "Failed to load a valid .earth file" );

    // create a folder for the output
    osgDB::makeDirectory(rootFolder);
    if ( !osgDB::fileExists(rootFolder) )
        return usage("Failed to create root output folder" );

    Map* map = mapNode->getMap();

    // fire up a packager:
    TMSPackager packager( map->getProfile() );
    packager.setVerbose( verbose );
    if ( maxLevel != ~0 )
        packager.setMaxLevel( maxLevel );
    

    // package any image layers that are enabled:
    ImageLayerVector imageLayers;
    map->getImageLayers( imageLayers );

    unsigned counter = 0;
    
    for( ImageLayerVector::iterator i = imageLayers.begin(); i != imageLayers.end(); ++i, ++counter )
    {
        ImageLayer* layer = i->get();
        if ( layer->getImageLayerOptions().enabled() == true )
        {
            std::string layerFolder = toLegalFileName( layer->getName() );
            if ( layerFolder.empty() )
                layerFolder = Stringify() << "image_layer_" << counter;

            if ( verbose )
            {
                OE_NOTICE << LC << "Packaging image layer \"" << layerFolder << "\"" << std::endl;
            }

            std::string layerRoot = osgDB::concatPaths( rootFolder, layerFolder );
            TMSPackager::Result r = packager.package( layer, layerRoot, extension );
            if ( !r.ok )
            {
                OE_WARN << LC << r.message << std::endl;
            }
        }
        else if ( verbose )
        {
            OE_NOTICE << LC << "Skipping disabled layer \"" << layer->getName() << "\"" << std::endl;
        }
    }

    // package any elevation layers that are enabled:
    counter = 0;
    ElevationLayerVector elevationLayers;
    map->getElevationLayers( elevationLayers );

    for( ElevationLayerVector::iterator i = elevationLayers.begin(); i != elevationLayers.end(); ++i, ++counter )
    {
        ElevationLayer* layer = i->get();
        if ( layer->getElevationLayerOptions().enabled() == true )
        {
            std::string layerFolder = toLegalFileName( layer->getName() );
            if ( layerFolder.empty() )
                layerFolder = Stringify() << "elevation_layer_" << counter;

            if ( verbose )
            {
                OE_NOTICE << LC << "Packaging elevation layer \"" << layerFolder << "\"" << std::endl;
            }

            std::string layerRoot = osgDB::concatPaths( rootFolder, layerFolder );
            packager.package( layer, layerRoot );
        }
        else if ( verbose )
//.........这里部分代码省略.........

Viewer::Viewer(osg::ArgumentParser& arguments)
{
    _viewerBase = this;

    constructorInit();

    // Add help for command-line options read here
    arguments.getApplicationUsage()->addCommandLineOption("--SingleThreaded","Select SingleThreaded threading model for viewer.");
    arguments.getApplicationUsage()->addCommandLineOption("--CullDrawThreadPerContext","Select CullDrawThreadPerContext threading model for viewer.");
    arguments.getApplicationUsage()->addCommandLineOption("--DrawThreadPerContext","Select DrawThreadPerContext threading model for viewer.");
    arguments.getApplicationUsage()->addCommandLineOption("--CullThreadPerCameraDrawThreadPerContext","Select CullThreadPerCameraDrawThreadPerContext threading model for viewer.");
    arguments.getApplicationUsage()->addCommandLineOption("--clear-color <color>","Set the background color of the viewer in the form \"r,g,b[,a]\".");
    arguments.getApplicationUsage()->addCommandLineOption("--screen <num>","Set the screen to use when multiple screens are present.");
    arguments.getApplicationUsage()->addCommandLineOption("--window <x y w h>","Set the position (x,y) and size (w,h) of the viewer window.");

    arguments.getApplicationUsage()->addCommandLineOption("--run-on-demand","Set the run methods frame rate management to only rendering frames when required.");
    arguments.getApplicationUsage()->addCommandLineOption("--run-continuous","Set the run methods frame rate management to rendering frames continuously.");
    arguments.getApplicationUsage()->addCommandLineOption("--run-max-frame-rate","Set the run methods maximum permissible frame rate, 0.0 is default and switching off frame rate capping.");
    arguments.getApplicationUsage()->addCommandLineOption("--enable-object-cache","Enable caching of objects, images, etc.");

    // FIXME: Uncomment these lines when the options have been documented properly
    //arguments.getApplicationUsage()->addCommandLineOption("--3d-sd","");
    //arguments.getApplicationUsage()->addCommandLineOption("--panoramic-sd","");
    //arguments.getApplicationUsage()->addCommandLineOption("--radius","");
    //arguments.getApplicationUsage()->addCommandLineOption("--collar","");
    //arguments.getApplicationUsage()->addCommandLineOption("--im","");

    if (arguments.read("--ico"))
    {
        setIncrementalCompileOperation(new osgUtil::IncrementalCompileOperation());
    }

    std::string filename;
    bool readConfig = false;
    while (arguments.read("-c",filename))
    {
        readConfig = readConfiguration(filename) || readConfig;
    }

    // Enable caching?
    while (arguments.read("--enable-object-cache"))
    {
        if (osgDB::Registry::instance()->getOptions()==0) osgDB::Registry::instance()->setOptions(new osgDB::Options());
        osgDB::Registry::instance()->getOptions()->setObjectCacheHint(osgDB::Options::CACHE_ALL);
    }

    while (arguments.read("--SingleThreaded")) setThreadingModel(SingleThreaded);
    while (arguments.read("--CullDrawThreadPerContext")) setThreadingModel(CullDrawThreadPerContext);
    while (arguments.read("--DrawThreadPerContext")) setThreadingModel(DrawThreadPerContext);
    while (arguments.read("--CullThreadPerCameraDrawThreadPerContext")) setThreadingModel(CullThreadPerCameraDrawThreadPerContext);

    osg::DisplaySettings::instance()->readCommandLine(arguments);
    osgDB::readCommandLine(arguments);

    std::string colorStr;
    while (arguments.read("--clear-color",colorStr))
    {
        float r, g, b;
        float a = 1.0f;
        int cnt = sscanf( colorStr.c_str(), "%f,%f,%f,%f", &r, &g, &b, &a );
        if( cnt==3 || cnt==4 )
        {
            getCamera()->setClearColor( osg::Vec4(r,g,b,a) );
        }
        else
        {
            OSG_WARN<<"Invalid clear color \""<<colorStr<<"\""<<std::endl;
        }
    }


    while(arguments.read("--run-on-demand")) { setRunFrameScheme(ON_DEMAND); }
    while(arguments.read("--run-continuous")) { setRunFrameScheme(CONTINUOUS); }

    double runMaxFrameRate;
    while(arguments.read("--run-max-frame-rate", runMaxFrameRate)) { setRunMaxFrameRate(runMaxFrameRate); }


    int screenNum = -1;
    while (arguments.read("--screen",screenNum)) {}

    int x = -1, y = -1, width = -1, height = -1;
    while (arguments.read("--window",x,y,width,height)) {}

    bool ss3d = false;
    bool wowvx20 = false;
    bool wowvx42 = false;
    if ((wowvx20=arguments.read("--wowvx-20")) || (wowvx42=arguments.read("--wowvx-42")) || arguments.read("--wowvx"))
    {
        osg::ref_ptr<WoWVxDisplay> wow = new WoWVxDisplay;

        if (screenNum>=0) wow->setScreenNum(screenNum);
        if (wowvx20) wow->WoWVx20();
        if (wowvx42) wow->WoWVx42();

        unsigned int c;
        float v;
        while (arguments.read("--wow-content",c)) { wow->setContent(c); }
        while (arguments.read("--wow-factor",c)) { wow->setFactor(c); }
        while (arguments.read("--wow-offset",c)) { wow->setOffset(c); }
//.........这里部分代码省略.........

void
MapNodeHelper::parse(MapNode*             mapNode,
                     osg::ArgumentParser& args,
                     osgViewer::View*     view,
                     osg::Group*          root,
                     Control*             userControl ) const
{
    // this is a dubious move.
    if ( !root )
        root = mapNode;

    // options to use for the load
    osg::ref_ptr<osgDB::Options> dbOptions = Registry::instance()->cloneOrCreateOptions();

    // parse out custom example arguments first:
    bool useSky        = args.read("--sky");
    bool useOcean      = args.read("--ocean");
    bool useMGRS       = args.read("--mgrs");
    bool useDMS        = args.read("--dms");
    bool useDD         = args.read("--dd");
    bool useCoords     = args.read("--coords") || useMGRS || useDMS || useDD;
    bool useOrtho      = args.read("--ortho");
    bool useAutoClip   = args.read("--autoclip");

    float ambientBrightness = 0.2f;
    args.read("--ambientBrightness", ambientBrightness);

    std::string kmlFile;
    args.read( "--kml", kmlFile );

    std::string imageFolder;
    args.read( "--images", imageFolder );

    std::string imageExtensions;
    args.read("--image-extensions", imageExtensions);

    // install a canvas for any UI controls we plan to create:
    ControlCanvas* canvas = ControlCanvas::get(view, false);

    Container* mainContainer = canvas->addControl( new VBox() );
    mainContainer->setAbsorbEvents( true );
    mainContainer->setBackColor( Color(Color::Black, 0.8) );
    mainContainer->setHorizAlign( Control::ALIGN_LEFT );
    mainContainer->setVertAlign( Control::ALIGN_BOTTOM );

    // install the user control:
    if ( userControl )
        mainContainer->addControl( userControl );

    // look for external data in the map node:
    const Config& externals = mapNode->externalConfig();

    const Config& skyConf         = externals.child("sky");
    const Config& oceanConf       = externals.child("ocean");
    const Config& annoConf        = externals.child("annotations");
    const Config& declutterConf   = externals.child("decluttering");
    Config        viewpointsConf  = externals.child("viewpoints");

    // some terrain effects.
    const Config& normalMapConf   = externals.child("normal_map");
    const Config& detailTexConf   = externals.child("detail_texture");
    const Config& lodBlendingConf = externals.child("lod_blending");
    const Config& vertScaleConf   = externals.child("vertical_scale");
    const Config& contourMapConf  = externals.child("contour_map");

    // backwards-compatibility: read viewpoints at the top level:
    const ConfigSet& old_viewpoints = externals.children("viewpoint");
    for( ConfigSet::const_iterator i = old_viewpoints.begin(); i != old_viewpoints.end(); ++i )
        viewpointsConf.add( *i );

    // Loading a viewpoint list from the earth file:
    if ( !viewpointsConf.empty() )
    {
        std::vector<Viewpoint> viewpoints;

        const ConfigSet& children = viewpointsConf.children();
        if ( children.size() > 0 )
        {
            for( ConfigSet::const_iterator i = children.begin(); i != children.end(); ++i )
            {
                viewpoints.push_back( Viewpoint(*i) );
            }
        }

        if ( viewpoints.size() > 0 )
        {
            Control* c = ViewpointControlFactory().create(viewpoints, view);
            if ( c )
                mainContainer->addControl( c );
        }
    }

    // Adding a sky model:
    if ( useSky || !skyConf.empty() )
    {
        double hours = skyConf.value( "hours", 12.0 );
        SkyNode* sky = new SkyNode( mapNode->getMap() );
        sky->setAmbientBrightness( ambientBrightness );
        sky->setDateTime( DateTime(2011, 3, 6, hours) );
        sky->attach( view );
//.........这里部分代码省略.........

osg::ref_ptr<osg::Node> p3d::readShowFiles(osg::ArgumentParser& arguments,const osgDB::ReaderWriter::Options* options)
{
    osg::ref_ptr<osgDB::Options> local_options = createOptions(options);
    local_options->setOptionString("main");

    typedef std::vector< osg::ref_ptr<osg::Node> > NodeList;
    NodeList nodeList;

    std::string filename;
    while (arguments.read("--image",filename))
    {
        osg::ref_ptr<osg::Image> image = readImageFile(filename.c_str(), local_options.get());
        if (image.valid()) nodeList.push_back(osg::createGeodeForImage(image.get()));
    }

    while (arguments.read("--movie",filename))
    {
        osg::ref_ptr<osg::Image> image = readImageFile(filename.c_str(), local_options.get());
        osg::ref_ptr<osg::ImageStream> imageStream = dynamic_cast<osg::ImageStream*>(image.get());
        if (image.valid())
        {
            imageStream->play();
            nodeList.push_back(osg::createGeodeForImage(imageStream.get()));
        }
    }

    while (arguments.read("--dem",filename))
    {
        osg::HeightField* hf = readHeightFieldFile(filename.c_str(), local_options.get());
        if (hf)
        {
            osg::Geode* geode = new osg::Geode;
            geode->addDrawable(new osg::ShapeDrawable(hf));
            nodeList.push_back(geode);
        }
    }

    // note currently doesn't delete the loaded file entries from the command line yet...
    for(int pos=1;pos<arguments.argc();++pos)
    {
        if (!arguments.isOption(pos))
        {
            // not an option so assume string is a filename.
            osg::Node *node = osgDB::readNodeFile( arguments[pos], local_options.get());

            if(node)
            {
                if (node->getName().empty()) node->setName( arguments[pos] );
                nodeList.push_back(node);
            }
        }
    }
    
    if (nodeList.empty())
    {
        return NULL;
    }
    
    osg::ref_ptr<osg::Node> root;

    if (nodeList.size()==1)
    {
        root = nodeList.front().get();
    }
    else  // size >1
    {
        
        osg::Switch* sw = new osg::Switch;
        for(NodeList::iterator itr=nodeList.begin();
            itr!=nodeList.end();
            ++itr)
        {
            sw->addChild((*itr).get());
        }
        sw->setSingleChildOn(0);
        
        sw->setEventCallback(new p3d::ShowEventHandler());

        root = sw;
    }

    if (root.valid())
    {
        osg::notify(osg::INFO)<<"Got node now adding callback"<<std::endl;
    
        AddVolumeEditingCallbackVisitor avecv;
        root->accept(avecv);
    }

    return root;
}

void
MapNodeHelper::parse(MapNode*             mapNode,
                     osg::ArgumentParser& args,
                     osgViewer::View*     view,
                     osg::Group*          root,
                     Container*           userContainer ) const
{
    if ( !root )
        root = mapNode;

    // options to use for the load
    osg::ref_ptr<osgDB::Options> dbOptions = Registry::instance()->cloneOrCreateOptions();

    // parse out custom example arguments first:
    bool useMGRS       = args.read("--mgrs");
    bool useDMS        = args.read("--dms");
    bool useDD         = args.read("--dd");
    bool useCoords     = args.read("--coords") || useMGRS || useDMS || useDD;

    bool useAutoClip   = args.read("--autoclip");
    bool animateSky    = args.read("--animate-sky");
    bool showActivity  = args.read("--activity");
    bool useLogDepth   = args.read("--logdepth");
    bool useLogDepth2  = args.read("--logdepth2");
    bool kmlUI         = args.read("--kmlui");

    if (args.read("--verbose"))
        osgEarth::setNotifyLevel(osg::INFO);
    
    if (args.read("--quiet"))
        osgEarth::setNotifyLevel(osg::FATAL);

    float ambientBrightness = 0.2f;
    args.read("--ambientBrightness", ambientBrightness);

    std::string kmlFile;
    args.read( "--kml", kmlFile );

    std::string imageFolder;
    args.read( "--images", imageFolder );

    std::string imageExtensions;
    args.read("--image-extensions", imageExtensions);
    
    // animation path:
    std::string animpath;
    if ( args.read("--path", animpath) )
    {
        view->setCameraManipulator( new osgGA::AnimationPathManipulator(animpath) );
    }

    // Install a new Canvas for our UI controls, or use one that already exists.
    ControlCanvas* canvas = ControlCanvas::getOrCreate( view );

    Container* mainContainer;
    if ( userContainer )
    {
        mainContainer = userContainer;
    }
    else
    {
        mainContainer = new VBox();
        mainContainer->setAbsorbEvents( true );
        mainContainer->setBackColor( Color(Color::Black, 0.8) );
        mainContainer->setHorizAlign( Control::ALIGN_LEFT );
        mainContainer->setVertAlign( Control::ALIGN_BOTTOM );
    }
    canvas->addControl( mainContainer );

    // Add an event handler to toggle the canvas with a key press;
    view->addEventHandler(new ToggleCanvasEventHandler(canvas) );




    // look for external data in the map node:
    const Config& externals = mapNode->externalConfig();

    //const Config& screenSpaceLayoutConf = 
    //    externals.hasChild("screen_space_layout") ? externals.child("screen_space_layout") :
    //    externals.child("decluttering"); // backwards-compatibility


    // some terrain effects.
    // TODO: Most of these are likely to move into extensions.
    const Config& lodBlendingConf = externals.child("lod_blending");
    const Config& vertScaleConf   = externals.child("vertical_scale");

    // Shadowing.
    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 )
            {
//.........这里部分代码省略.........

void
MapNodeHelper::parse(MapNode*             mapNode,
                     osg::ArgumentParser& args,
                     osgViewer::View*     view,
                     osg::Group*          root,
                     Control*             userControl ) const
{
    // this is a dubious move.
    if ( !root )
        root = mapNode;

    // options to use for the load
    osg::ref_ptr<osgDB::Options> dbOptions = Registry::instance()->cloneOrCreateOptions();

    // parse out custom example arguments first:

    bool useSky        = args.read("--sky");
    bool useOcean      = args.read("--ocean");
    bool useMGRS       = args.read("--mgrs");
    bool useDMS        = args.read("--dms");
    bool useDD         = args.read("--dd");
    bool useCoords     = args.read("--coords") || useMGRS || useDMS || useDD;
    bool useOrtho      = args.read("--ortho");
    bool useAutoClip   = args.read("--autoclip");

    float ambientBrightness = 0.4f;
    args.read("--ambientBrightness", ambientBrightness);

    std::string kmlFile;
    args.read( "--kml", kmlFile );

    // install a canvas for any UI controls we plan to create:
    ControlCanvas* canvas = ControlCanvas::get(view, false);

    Container* mainContainer = canvas->addControl( new VBox() );
    mainContainer->setBackColor( Color(Color::Black, 0.8) );
    mainContainer->setHorizAlign( Control::ALIGN_LEFT );
    mainContainer->setVertAlign( Control::ALIGN_BOTTOM );

    // install the user control:
    if ( userControl )
        mainContainer->addControl( userControl );

    // look for external data in the map node:
    const Config& externals = mapNode->externalConfig();

    const Config& skyConf         = externals.child("sky");
    const Config& oceanConf       = externals.child("ocean");
    const Config& annoConf        = externals.child("annotations");
    const Config& declutterConf   = externals.child("decluttering");
    Config        viewpointsConf  = externals.child("viewpoints");

    // backwards-compatibility: read viewpoints at the top level:
    const ConfigSet& old_viewpoints = externals.children("viewpoint");
    for( ConfigSet::const_iterator i = old_viewpoints.begin(); i != old_viewpoints.end(); ++i )
        viewpointsConf.add( *i );

    // Loading a viewpoint list from the earth file:
    if ( !viewpointsConf.empty() )
    {
        std::vector<Viewpoint> viewpoints;

        const ConfigSet& children = viewpointsConf.children();
        if ( children.size() > 0 )
        {
            for( ConfigSet::const_iterator i = children.begin(); i != children.end(); ++i )
            {
                viewpoints.push_back( Viewpoint(*i) );
            }
        }

        if ( viewpoints.size() > 0 )
        {
            Control* c = ViewpointControlFactory().create(viewpoints, view);
            if ( c )
                mainContainer->addControl( c );
        }
    }

    // Adding a sky model:
    if ( useSky || !skyConf.empty() )
    {
        double hours = skyConf.value( "hours", 12.0 );
        SkyNode* sky = new SkyNode( mapNode->getMap() );
        sky->setAmbientBrightness( ambientBrightness );
        sky->setDateTime( 2011, 3, 6, hours );
        sky->attach( view );
        root->addChild( sky );
        Control* c = SkyControlFactory().create(sky, view);
        if ( c )
            mainContainer->addControl( c );
    }

    // Adding an ocean model:
    if ( useOcean || !oceanConf.empty() )
    {
        OceanSurfaceNode* ocean = new OceanSurfaceNode( mapNode, oceanConf );
        if ( ocean )
        {
            root->addChild( ocean );
//.........这里部分代码省略.........