osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer();
viewer->setSceneData(groupRoot.get());
return viewer->run(); 

就直接可以跑全屏的程序了，然是现在会在两块屏出现全屏，他很苦恼。

于是他：

osgViewer::View* createView(int screenNum)
{
unsigned int width = 1920, height = 1080;
osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
if (wsi)
{
wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(screenNum),width,height);
}osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->screenNum = screenNum;
traits->x = 0;
traits->y = 0;
traits->width = width;
traits->height = height;
traits->windowDecoration = false;
traits->doubleBuffer = true;
traits->sharedContext = 0;
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
if (!gc) return NULL;osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(0,0,width,height));
camera->setProjectionMatrixAsPerspective(30.0f, static_cast<double>(width) / static_cast<double>(height), 1.0f, 10000.0f);GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);osg::ref_ptr<osgViewer::View> view = new osgViewer::View;
view->setCamera(camera.get());
view->setCameraManipulator(new osgGA::TrackballManipulator);
return view.release();
}

osg::ref_ptr<osgViewer::CompositeViewer> viewer = new osgViewer::CompositeViewer();osgViewer::View* view = createView(0);if (view){view->setSceneData(groupRoot.get());viewer->addView(view);}return viewer->run();

osg::ref_ptr<osg::StateSet> pStateSet = new osg::StateSet();
// 启用混合pStateSet->setMode(GL_BLEND,osg::StateAttribute::ON);····
//主要是下面这句
pStateSet->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);pGeometry->setStateSet(pStateSet.get());

// 状态属性对象osg::ref_ptr<osg::StateSet> pStateSet = new osg::StateSet();// 创建一个2D属性对象osg::ref_ptr<osg::Texture2D> pTexture2D = new osg::Texture2D();// 关联Image对象pTexture2D->setImage(image.get());// 关联Texture2D纹理对象pStateSet->setTextureAttributeAndModes(0, pTexture2D,osg::StateAttribute::ON);// 启用混合pStateSet->setMode(GL_BLEND,osg::StateAttribute::ON);// 关闭光照pStateSet->setMode(GL_LIGHTING,osg::StateAttribute::OFF);····················osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer();viewer->setSceneData(groupRoot.get());
//其实下面这句话就可以解决我同事多屏幕的问题viewer->setUpViewOnSingleScreen();return viewer->run();