C++ Viewer::done方法代码示例

/**
  Run the dynamics for a cycle.
*/
void run( Real dt ) {

    // fetch the command in the buffer
    //get_command();

    #ifdef USE_OSG
    if (ONSCREEN_RENDER)
    {
      if (viewer.done())
        return;
      viewer.frame();
    }
    #endif

    // Note: research how the original driver sets up all the parameters that
    // drive step size.  sim->step(dt) is not sufficient in and of itself so
    // there must be another or more parameters that manipulate this state info
    //sim->step( dt );
    // step the sim forward
    STEP_SIZE = dt;
    step((void*) &sim);

    // publish any state change
    //publish_state();

    //#ifdef USE_OSG
    //usleep(DYNAMICS_FREQ);
    //#endif

}

int main(int argc, char** argv)
{
	viewer.setSceneData(root.get());
	filename = argv[1];	
	
	startMenu = new StartMenu(&viewer, startApplication);
	root->addChild(startMenu->_camera);


	if(root.valid())
	{	
		
		//viewer.setCameraManipulator(new osgGA::TrackballManipulator());
		viewer.realize();
	
		while(!viewer.done())
		{
			viewer.frame();
			//update();
		}
	}
	else
	{
		std::cout << "Invalid Graph!" << std::endl;
	}
	
	return 0;
}

// Step the dynamics forward
    void step( const Real &dt ) {

#ifdef USE_OSG
        if( ONSCREEN_RENDER ) {
            if( viewer.done( ) ) return;
            viewer.frame( );
        }
#endif

        // step the sim forward
        STEP_SIZE = dt;
        step( (void*) &sim );
    }

//.........这里部分代码省略.........
	// to textures.
	std::string search_path = ";";
	csp::ospath::addpath(search_path, "./data/images/");
	csp::ospath::addpath(search_path, "./data/models/");
	csp::ObjectModel::setDataFilePathList(search_path);

	// Set paths for shader files.
	Shader::instance()->setShaderPath("./data/shaders/");


	// =====================================================================
	// Manual creation of a object model.
	Ref<ObjectModel> my_model = new ObjectModel();

	// An external is used to handle the path to the scene graph file.
	// It is also ensuring that paths is handled independent on operating
	// system.
	External modelPath;
	modelPath.setSource("industry/refinery_column01/refinery_column01.osg");
	my_model->setModelPath(modelPath);
	my_model->setSmooth(true);

	// Load the model from disc. This will also apply needed shaders.
	// smoothing and more things.
	my_model->loadModel();

	// read osgEarth config file and create the globe
	std::cout << "reading osgEarth config file: " << osgEarthFileName << std::endl;
	osg::ref_ptr<osg::Node> globe = osgDB::readNodeFile(osgEarthFileName);
	osg::ref_ptr<osg::Node> topNode = new osg::Node;

	osg::Group* group = new osg::Group;
	group->setName("root group");

	// =====================================================================
	// construct the viewer
	viewer.addEventHandler(new osgViewer::StatsHandler);
	viewer.addEventHandler(new osgViewer::HelpHandler);
    viewer.addEventHandler(new osgViewer::WindowSizeHandler);
	viewer.addEventHandler(new osgViewer::ScreenCaptureHandler);

	// modify the key mapping of an osg default event handler
	// this is just to demonstrate the principle, no real use case behind it...
	osgViewer::View::EventHandlers eventHandlers = viewer.getEventHandlers();
	// iterate through the viewer's event handlers and modify their default behavior
	for (osgViewer::View::EventHandlers::iterator it = eventHandlers.begin(); it != eventHandlers.end(); ++it)
	{
		// EventHandlers is a list of osgGA::GUIEventHandlers, so RTTI is used to find out the derived class
		if(osgViewer::WindowSizeHandler *winSizeHandler = 
			dynamic_cast<osgViewer::WindowSizeHandler *>(it->get()))
		{
			winSizeHandler->setKeyEventToggleFullscreen(osgGA::GUIEventAdapter::KEY_F2);
		}
	}


	// Create overlay data
	osg::ref_ptr<osg::Geode> statsGeometry = createStatsGeometry();
	group->addChild( statsGeometry );
	
	// add the osgEarth globe to the scene
	group->addChild( globe.get() );
	group->addChild( my_model->getModel().get() );

	//viewer.setSceneData(my_model->getModel().get());
	viewer.setSceneData( group );
	//viewer.setSceneData(globe.get());

	// create camera and context
	setupCameraAndContext( viewer, windowWidth, windowHeight );

	// the overlay geometry is added to an individual camera
	// QUESTION: But why isn't it rendered by the primary cam?!?
	statsCamera->addChild( statsGeometry );

	//viewer.setCameraManipulator(new osgGA::FlightManipulator);

	osgEarth::MapNode* mapNode = osgEarth::MapNode::findMapNode(globe);
    manip = new osgEarthUtil::EarthManipulator();
	manip->setNode(globe);
    if ( mapNode->getMap()->isGeocentric() )
    {
        manip->setHomeViewpoint( 
            osgEarthUtil::Viewpoint( osg::Vec3d( -90, 0, 0 ), 0.0, -90.0, 5e7 ) );
    }
	manip->getSettings()->bindMouseDoubleClick(
		osgEarthUtil::EarthManipulator::ACTION_GOTO, osgGA::GUIEventAdapter::LEFT_MOUSE_BUTTON );

	viewer.setCameraManipulator(manip);
	viewer.addEventHandler(new inputHandler());
	// run the viewers frame loop
    viewer.realize();

    // main loop (note, window toolkits which take control over the main loop will require 
	// a window redraw callback containing the code below.)
    while(!viewer.done())
    {
        viewer.frame();
    }
}

int Metrics::run(osgViewer::Viewer& viewer)
{
    if (Metrics::enabled())
    {
        if (!viewer.isRealized())
        {
            viewer.realize();
        }

        // If Metrics are enabled, enable stats on the Viewer so that it we can report them for the Metrics
        if (Metrics::enabled())
        {
            osgViewer::ViewerBase::Scenes scenes;
            viewer.getScenes(scenes);
            for (osgViewer::ViewerBase::Scenes::iterator itr = scenes.begin();
                itr != scenes.end();
                ++itr)
            {
                osgViewer::Scene* scene = *itr;
                osgDB::DatabasePager* dp = scene->getDatabasePager();
                if (dp && dp->isRunning())
                {
                    dp->resetStats();
                }
            }

            viewer.getViewerStats()->collectStats("frame_rate", true);
            viewer.getViewerStats()->collectStats("event", true);
            viewer.getViewerStats()->collectStats("update", true);

            viewer.getCamera()->getStats()->collectStats("rendering", true);
            viewer.getCamera()->getStats()->collectStats("gpu", true);
        }

        // Report memory and fps every 10 frames.
        unsigned int reportEvery = 10;

        while (!viewer.done())
        {
            {
                METRIC_SCOPED_EX("frame", 1, "number", toString<int>(viewer.getFrameStamp()->getFrameNumber()).c_str());
                {
                    METRIC_SCOPED("advance");
                    viewer.advance();
                }

                {
                    METRIC_SCOPED("event");
                    viewer.eventTraversal();
                }

                {
                    METRIC_SCOPED("update");
                    viewer.updateTraversal();
                }

                {
                    METRIC_SCOPED("render");
                    viewer.renderingTraversals();
                }

            }

            // Report memory and fps periodically. periodically.
            if (viewer.getFrameStamp()->getFrameNumber() % reportEvery == 0)
            {
                // Only report the metrics if they are enabled to avoid computing the memory.
                if (Metrics::enabled())
                {
                    Metrics::counter("Memory::WorkingSet", "WorkingSet", Memory::getProcessPhysicalUsage() / 1048576);
                    Metrics::counter("Memory::PrivateBytes", "PrivateBytes", Memory::getProcessPrivateUsage() / 1048576);
                    Metrics::counter("Memory::PeakPrivateBytes", "PeakPrivateBytes", Memory::getProcessPeakPrivateUsage() / 1048576);
                }
            }

            double eventTime = 0.0;
            if (viewer.getViewerStats()->getAttribute(viewer.getViewerStats()->getLatestFrameNumber(), "Event traversal time taken", eventTime))
            {
                Metrics::counter("Viewer::Event", "Event", eventTime * 1000.0);
            }

            double updateTime = 0.0;
            if (viewer.getViewerStats()->getAttribute(viewer.getViewerStats()->getLatestFrameNumber(), "Update traversal time taken", updateTime))
            {
                Metrics::counter("Viewer::Update", "Update", updateTime * 1000.0);
            }

            double cullTime = 0.0;
            if (viewer.getCamera()->getStats()->getAttribute(viewer.getCamera()->getStats()->getLatestFrameNumber(), "Cull traversal time taken", cullTime))
            {
                Metrics::counter("Viewer::Cull", "Cull", cullTime * 1000.0);
            }

            double drawTime = 0.0;
            if (viewer.getCamera()->getStats()->getAttribute(viewer.getCamera()->getStats()->getLatestFrameNumber(), "Draw traversal time taken", drawTime))
            {
                Metrics::counter("Viewer::Draw", "Draw", drawTime * 1000.0);
            }

            double gpuTime = 0.0;
//.........这里部分代码省略.........