C++ Viewer::getCamera方法代码示例

void
viewerSetUp( osgViewer::Viewer& viewer, double aspect, osg::Node* node )
{
    viewer.getCamera()->setComputeNearFarMode( osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR );
    viewer.getCamera()->setProjectionMatrixAsPerspective( 35., aspect, .1, 50. );

    viewer.getCamera()->setClearMask( 0 );

    viewer.setSceneData( backdropFX::Manager::instance()->getManagedRoot() );

    // No longer needed, apparently. Seems like Viewer used to focus the
    // camera manipulator on the entire SkyDome, putting it too far away from
    // the scene. This code compensated for that.
    //osgGA::TrackballManipulator* tb = new osgGA::TrackballManipulator();
    //viewer.setCameraManipulator( tb );
    //tb->setNode( root.get() );
    //tb->home( 0 );

    viewer.addEventHandler( new osgViewer::StatsHandler );
    viewer.addEventHandler( new osgViewer::ThreadingHandler );

    osgGA::TrackballManipulator* tbm = new osgGA::TrackballManipulator;
    viewer.setCameraManipulator( tbm );
    tbm->setNode( node );
    tbm->home( 0 );
}

void
viewerSetUp( osgViewer::Viewer& viewer, unsigned int width, unsigned int height, osg::Node* node )
{
    double aspect = (double)width / (double)height;

    viewer.setThreadingModel( osgViewer::ViewerBase::SingleThreaded );
    viewer.getCamera()->setComputeNearFarMode( osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR );
    viewer.getCamera()->setProjectionMatrix( createProjection( aspect ) );

    viewer.getCamera()->setClearMask( 0 );

    viewer.setSceneData( backdropFX::Manager::instance()->getManagedRoot() );

    // No longer needed, apparently. Seems like Viewer used to focus the
    // camera manipulator on the entire SkyDome, putting it too far away from
    // the scene. This code compensated for that.
    //osgGA::TrackballManipulator* tb = new osgGA::TrackballManipulator();
    //viewer.setCameraManipulator( tb );
    //tb->setNode( root.get() );
    //tb->home( 0 );

    viewer.addEventHandler( new osgViewer::StatsHandler );
    viewer.addEventHandler( new osgViewer::ThreadingHandler );
    viewer.addEventHandler( new ResizeHandler( viewer, width, height ) );

    osgGA::TrackballManipulator* tbm = new osgGA::TrackballManipulator;
    viewer.setCameraManipulator( tbm );
    tbm->setNode( node );
    tbm->home( 0 );
}

void AppState::updateNear()
{
    // Assume that the viewing frustum is symmetric.
    double fovy, aspectRatio, cNear, cFar;
    viewer->getCamera()->getProjectionMatrixAsPerspective(fovy, aspectRatio,
                                                          cNear, cFar);
    viewer->getCamera()->setProjectionMatrixAsPerspective(fovy, aspectRatio,
                                                          zNear, cFar);
    stringstream nearStream;
    nearStream << "near: " << zNear;
    zNearText->setText(nearStream.str());
    zNearText->update();
}

void updateUserStats(osgViewer::Viewer& viewer)
{
    // Test the custom stats line by just adding up the update and cull 
    // times for the viewer main camera for the previous frame.
    if (viewer.getViewerStats()->collectStats("update") && viewer.getCamera()->getStats()->collectStats("rendering"))
    {
        // First get the frame number. The code below assumes that 
        // updateUserStats() is called after advance(), so the frame number
        // that will be returned is for the frame that has just started and is
        // not rendered yet. The previous frame is framenumber-1, but we can't
        // use that frame's timings because it's probably not finished 
        // rendering yet (in multithreaded viewer modes). So we'll use the
        // timings for framenumber-2 for this demo.
        int framenumber = viewer.getFrameStamp()->getFrameNumber();

        // Get the update time and the viewer main camera's cull time. We use 
        // getAveragedAttribute() in order to get the actual time elapsed as 
        // calculated by the stats.
        double update = 0.0, cull = 0.0;
        viewer.getViewerStats()->getAveragedAttribute("Update traversal time taken", update);
        viewer.getCamera()->getStats()->getAveragedAttribute("Cull traversal time taken", cull);

        // Get various begin and end times, note these are not elapsed times 
        // in a frame but rather the simulation time at those moments.
        double eventBegin = 0.0, updateBegin = 0.0, cullEnd = 0.0, drawEnd = 0.0;
        viewer.getViewerStats()->getAttribute(framenumber-2, "Event traversal begin time", eventBegin);
        viewer.getViewerStats()->getAttribute(framenumber-2, "Update traversal begin time", updateBegin);
        viewer.getCamera()->getStats()->getAttribute(framenumber-2, "Cull traversal end time", cullEnd);
        viewer.getCamera()->getStats()->getAttribute(framenumber-2, "Draw traversal end time", drawEnd);

        // This line displays the frame number. It's not averaged, just displayed as is.
        viewer.getViewerStats()->setAttribute(framenumber, frameNumberName, framenumber);

        // This line displays the frame time (from beginning of event to end of draw). No bars.
        viewer.getViewerStats()->setAttribute(framenumber-1, frameTimeName, drawEnd - eventBegin);

        // This line displays the sum of update and main camera cull times.
        viewer.getViewerStats()->setAttribute(framenumber-1, customTimeName + " time taken", update+cull);
        // Since we give begin and end times that correspond to the begin of 
        // the update phase and the end of the cull phase, the bar in the 
        // graph will not correspond to the summed times above if something 
        // happened between update and cull (as in this demo). Also, we need 
        // to translate the updateBegin and cullEnd times by one frame since 
        // we're taking the times for framenumber-2 but using them to display
        // in the framenumber-1 graph.
        viewer.getViewerStats()->setAttribute(framenumber-1, customTimeName + " begin", updateBegin + (1.0/60.0));
        viewer.getViewerStats()->setAttribute(framenumber-1, customTimeName + " end", cullEnd + (1.0/60.0));
    }
}

void setViewer(osgViewer::Viewer& viewer, float width, float height, float distance)
{
    double vfov = osg::RadiansToDegrees(atan2(height/2.0f,distance)*2.0);
    // double hfov = osg::RadiansToDegrees(atan2(width/2.0f,distance)*2.0);

    viewer.getCamera()->setProjectionMatrixAsPerspective( vfov, width/height, 0.1, 1000.0);
}

int main(int argc, char* argv[]) {
  ref_ptr<Group> root = new Group;
  viewer.setUpViewInWindow(0, 0, 640, 480);
  viewer.realize();
  ref_ptr<Camera> cam = viewer.getCamera();
  ref_ptr<Geode> geode = new Geode;
  root->addChild(geode.get());



  for (int i=0; i < 10; i++) {
    osg::Sphere* sphere = new osg::Sphere( Vec3f(i+1,10,0), .1*i);
    osg::ShapeDrawable* sphereDrawable = new osg::ShapeDrawable(sphere);
    geode->addDrawable(sphereDrawable);
  }

  // osg::Sphere* sphere = new osg::Sphere( Vec3f(10,10,0), .2);
  // osg::ShapeDrawable* sphereDrawable = new osg::ShapeDrawable(sphere);
  // sphereDrawable->setColor(osg::Vec4f(1,0,0,1));
  // geode->addDrawable(sphereDrawable);

  ref_ptr<osgGA::TrackballManipulator> manip = new osgGA::TrackballManipulator();


    viewer.setCameraManipulator(manip);

  viewer.setSceneData(root.get());
  cam->setViewMatrixAsLookAt(Vec3f(10,0,0), Vec3f(10,1,0), Vec3f(0,0,1));
  //manip->setHomePosition(Vec3f(10,0,0), Vec3f(11,1,0), Vec3f(10,0,1));
  //  cam->setProjectionMatrixAsPerspective(49,640/480., .1, 10);

  viewer.run();


}

void LevelMenu::loadLevels()
{
    _itemsPat = new osg::PositionAttitudeTransform();
	_itemsPat->setPosition(osg::Vec3(viewer.getCamera()->getViewport()->width() - 400, viewer.getCamera()->getViewport()->height() - 250, 0)); 
    
    // load XML document
    rapidxml::file<> mf(LEVEL_OVERVIEW_FILE);
    rapidxml::xml_document<> xml_doc;
    xml_doc.parse<0>(mf.data());
    
    int itemIndex = 0;
    
    // parse XML document
    for(rapidxml::node_iterator<char> it(xml_doc.first_node()); it.dereference() != NULL; ++it, ++itemIndex)
    {
        if(strcmp(it->name(), "road") == 0)
        {         
            std::string name = it->first_attribute("name")->value();

        	osg::Geode *itemNode = new osg::Geode();

        	osgText::Text *text = new osgText::Text();
        	text->setFont(MENU_FONT);
        	text->setPosition(osg::Vec3(0, - (itemIndex * MENU_ITEM_HEIGHT), 0));
            text->setText(name);

            itemNode->addDrawable(text);
            _itemsPat->addChild(itemNode);
            
            std::map<std::string, std::string> item;

            item["name"] = it->first_attribute("name")->value();
            item["filename"] = it->first_attribute("filename")->value();
            item["besttime"] = it->first_attribute("besttime")->value();
            item["completions"] = it->first_attribute("completions")->value();
            item["deaths"] = it->first_attribute("deaths")->value();
            
            _items.push_back(item);
        }
        else
        {
            throw std::runtime_error("Error: Unrecognized element in level file!");
        }
    }
    
    _menuPat->addChild(_itemsPat);
}

void SetCameraProjectionMatrix (osgViewer::Viewer& viewer, dFloat viewAngleInDegress, dFloat aspectRatio, dFloat nearPlane, dFloat farPlane)
{
	osg::Camera* const camera = viewer.getCamera();
	camera->setProjectionMatrixAsPerspective (viewAngleInDegress, aspectRatio, nearPlane, farPlane);

//	camera->setViewMatrixAsLookAt (osg::Vec3 (-3.0f, -5.0f, 2.0f), osg::Vec3 (0.0f, 0.0f, 2.0f), osg::Vec3 (0.0f, 0.0f, 1.0f));
	camera->setViewMatrixAsLookAt (osg::Vec3 (-0.0f, -5.0f, 2.0f), osg::Vec3 (0.0f, 0.0f, 2.0f), osg::Vec3 (0.0f, 0.0f, 1.0f));
}

void setViewer(osgViewer::Viewer& viewer, float width, float height, float distance)
{
    double vfov = osg::RadiansToDegrees(atan2(height/2.0f,distance)*2.0);
    // double hfov = osg::RadiansToDegrees(atan2(width/2.0f,distance)*2.0);

    viewer.getCamera()->setProjectionMatrixAsPerspective( vfov, width/height, 0.1, 1000.0);

    OSG_NOTICE<<"setProjectionMatrixAsPerspective( "<<vfov<<", "<<width/height<<", "<<0.1<<", "<<1000.0<<");"<<std::endl;
}

void LevelMenu::initializeHeader()
{
    osg::PositionAttitudeTransform *headerPat = new osg::PositionAttitudeTransform();
    osg::Geode *headerGeode = new osg::Geode();
    osg::Geometry *textureDrawable = new osg::Geometry();
    osg::Texture2D *texture;

    osg::Vec3Array *vertices = new osg::Vec3Array();
    {
        vertices->push_back(osg::Vec3(0, 0, 0));
        vertices->push_back(osg::Vec3(436, 0, 0));
        vertices->push_back(osg::Vec3(436, 75, 0));
        vertices->push_back(osg::Vec3(0, 75, 0));
    }

    textureDrawable->setVertexArray( vertices );

    osg::DrawElementsUInt *face = new osg::DrawElementsUInt(osg::PrimitiveSet::QUADS, 0);
    face->push_back(0);
    face->push_back(1);
    face->push_back(2);
    face->push_back(3);
    
    textureDrawable->addPrimitiveSet(face);
        
    osg::Vec2Array* texcoords = new osg::Vec2Array(4);
    {
        (*texcoords)[0].set(0.0f, 0.0f);
        (*texcoords)[1].set(1.0f, 0.0f); 
        (*texcoords)[2].set(1.0f, 1.0f);
        (*texcoords)[3].set(0.0f, 1.0f);

        textureDrawable->setTexCoordArray(0, texcoords);
    }
             
    texture = new osg::Texture2D;
    texture->setDataVariance(osg::Object::DYNAMIC); 
    texture->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT); 
    texture->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);

    osg::StateSet* stateSet = new osg::StateSet();
    stateSet->setTextureAttributeAndModes(0, texture, osg::StateAttribute::ON);
    
    textureDrawable->setStateSet(stateSet);
    headerGeode->addDrawable(textureDrawable);
    headerPat->addChild(headerGeode);
    _menuPat->addChild(headerPat);
    
    headerPat->setPosition(osg::Vec3(100, viewer.getCamera()->getViewport()->height() - 125, -0.01)); 
	
    osg::Image *image = osgDB::readImageFile(LEVEL_HEADER_TEXTURE);
    texture->setImage(image);
}

void Sky::initializeCamera()
{   	
	_camera = new osg::Camera();
	_camera->setProjectionMatrix(osg::Matrix::ortho2D(0, viewer.getCamera()->getViewport()->width(), 0, viewer.getCamera()->getViewport()->height()));
	_camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
	_camera->setViewMatrix(osg::Matrix::identity());
	
	_camera->setClearColor(osg::Vec4(0.0f, 0.0f, 0.0f, 1.0f));
    _camera->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    
	_camera->setRenderOrder(osg::Camera::PRE_RENDER);
	_camera->addChild(_skyPat);
}

int main(void){
	osg::DisplaySettings::instance()->setNumMultiSamples( 4 );
	viewer.setUpViewInWindow( 100, 50, 800, 600 );
	viewer.getCamera()->setClearColor( osg::Vec4( 0.5,0.5,0.5,1) );
	viewer.addEventHandler(new osgViewer::StatsHandler);
	
	scene = new osg::Group;
	
	osg::ref_ptr<osg::LightSource> lumiere = new osg::LightSource;
	lumiere->getLight()->setLightNum(0); // GL_LIGHT1
	lumiere->getLight()->setPosition(osg::Vec4(1, -1, 10, 0)); // 0 = directionnel
	lumiere->getLight()->setAmbient(osg::Vec4(0.5, 0.5, 0.5, 1.0));
	lumiere->getLight()->setDiffuse(osg::Vec4(0.9, 0.9, 0.9, 1.0));
	lumiere->getLight()->setSpecular(osg::Vec4(1.0, 1.0, 1.0, 1.0));
	scene->addChild(lumiere.get());
	
	terrain = creation_terrain();
	scene->addChild(terrain.get());
	scene->addChild(creation_foret(terrain, 500));
	
	LECHARRR = creation_CHARRR(0,0,terrain);
	scene->addChild(LECHARRR);
	
	LECHARRR->accept(rechercheTourelle);
	
	fumeeTank = new osgParticle::SmokeEffect;
	fumeeTank->setTextureFileName("fumee.tga");
	fumeeTank->setIntensity(2);
	fumeeTank->setScale(4);
	fumeeTank->setPosition(LECHARRR->getPosition());
	scene->addChild(fumeeTank.get());
	posCanonX = LECHARRR->getPosition().x();
	posCanonY = LECHARRR->getPosition().y() + 3.5;
	posCanonZ = LECHARRR->getPosition().z() + 4.0;
	
	
	
	
	viewer.setSceneData(scene);
	
	osg::ref_ptr<GestionEvenements> gestionnaire = new GestionEvenements();
	viewer.addEventHandler(gestionnaire.get());
	
	return viewer.run();
}

void LevelMenu::returnFromLevel()
{
   	
    if(_currentLevel->playerReachedFinish())
    {
        // update completions
        {
            std::stringstream ss;
            ss << atoi(_items[_currentItemIndex]["completions"].c_str()) + 1;
            _items[_currentItemIndex]["completions"] = ss.str();
        }
        
        // update best time
        {
            time_t t = _currentLevel->getTime();

            if(_items[_currentItemIndex]["besttime"] == "" | t < atol(_items[_currentItemIndex]["besttime"].c_str()))
            {
                std::stringstream ss;
                ss << t;
                _items[_currentItemIndex]["besttime"] =  ss.str();
            }
        }
    }

    // update number of deaths
    {
        std::stringstream ss;
        ss << atoi(_items[_currentItemIndex]["deaths"].c_str()) + _currentLevel->getNumDeaths();
        _items[_currentItemIndex]["deaths"] = ss.str();
    }
    
    viewer.setCameraManipulator(NULL); 
    viewer.getCamera()->setViewMatrixAsLookAt(MENU_CAMERA_HOME_EYE, MENU_CAMERA_HOME_CENTER, MENU_CAMERA_HOME_UP);
	
    _currentLevel->resetScene();
    viewer.setSceneData(this);
    _currentLevel = NULL;
    
    Player::getInstance()->reset();
    updateDetails();
    
    Sound::getInstance()->stop(LEVEL_MUSIC_FILE);
    Sound::getInstance()->playInLoop(MENU_MUSIC_FILE);
}

void InitWindowsSystem (osgViewer::Viewer& viewer, const char* const title, int x, int y, int width, int height)
{
	viewer.setUpViewInWindow(x, y, width, height);

	//Get the traits of the current window
	osg::ref_ptr< osg::GraphicsContext::Traits > traits = new osg::GraphicsContext::Traits( *viewer.getCamera()->getGraphicsContext()->getTraits());

	//Set the title
	traits->windowName = title;

	// disable vertical sync
	traits->vsync = false;

	//Create a new graphics context with the modified traits
	osg::ref_ptr< osg::GraphicsContext > gc = osg::GraphicsContext::createGraphicsContext( traits.get() );
	gc->realize();
	gc->makeCurrent();

	// set the vertical black off by default
	osgViewer::Viewer::Windows windows;
	viewer.getWindows(windows);
	for(osgViewer::Viewer::Windows::iterator itr = windows.begin(); itr != windows.end(); ++itr) {
		osgViewer::GraphicsWindow* const graphicsWindow = (*itr);
		graphicsWindow->setSyncToVBlank (false);
	}

	//Create the new camera which is a copy of the current camera in the viewer
	osg::ref_ptr<osg::Camera> cam = new osg::Camera( *viewer.getCamera() ); 

	//Set the cameras graphics context to the gc we made above
	cam->setGraphicsContext( gc );

	//assign the viewer the new camera
	viewer.setCamera( cam.get() );

	// int the camera default perspective matrix
	SetCameraProjectionMatrix (viewer, 60.0f, dFloat (width) / height, 0.01, 1000.0f);


	// set the file find callback
	osg::ref_ptr<DemosFindFileCallback> filecallback = new DemosFindFileCallback;
	osgDB::Registry::instance()->setFindFileCallback (filecallback.get());
}

LevelMenu::LevelMenu() :
    _currentLevel(NULL),
    _currentItemIndex(0)
{
	_menuPat = new osg::PositionAttitudeTransform();
	_menuPat->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);

    _keyboardHandler = new MenuKeyboardHandler(this);
    viewer.addEventHandler(_keyboardHandler);

	initializeCamera();
    initializeHeader();
    initializeBackgroundAnimation();
    initializeSelector();
    loadLevels();
    updateDetails();
            
    viewer.getCamera()->setUpdateCallback(new LevelMenuUpdater(this));

    Sound::getInstance()->playInLoop(MENU_MUSIC_FILE);    
}