OSG_EXAMPLE:osgwindows[创建窗口]

int main(int argc, char** argv)
{
    osg::ArgumentParser arguments(&argc, argv);
    
    osg::ref_ptr<osg::Node> loadedModel = osgDB::readRefNodeFiles(arguments);

    std::string path = osgDB::getFilePath("");

    if(!loadedModel) 
        loadedModel = osgDB::readRefNodeFile("");

    if(!loadedModel)
    {
        std::cout << arguments.getApplicationName() << std::endl;
        return 1;
    }

    osgViewer::Viewr viewer;
    
    int xoffset = 40;
    int yoffset  = 40;

    // left window + left slave camera
    {
        osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;

        traits->x = xoffset + 0;
        traits->y = yoffset + 0;
        traits->width = 600;
        traits->height = 480;
        traits->windowDecoration = true;
        traits->doubleBuffer = true;
        traits->sharedContext = 0;
        traits->readDISPLAY();
        traits->setUndefinedScreenDetailsToDefaultScreen();

        osg::ref_ptr<osg::GraphicsContext> gc = 
                osg::GraphicsContext::createGraphicsContext(traits.get());
    
        osg::ref_ptr<osg::Camera> camera = new osg::Camera;
        camera->setGraphicsContext(gc.get());
        camera->setViewport(new osg::Viewport(0, 0, traits->width, traits->height));

        GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
        camera->setDrawBuffer(buffer);
        camera->setReadBuffer(buffer);

        viewer.addSlave(camera.get(), osg::Matrixd::translate(1.0, 0.0, 0.0), osg::Matrixd());
    }

    // right window + right slave camera
    {
        osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
        traits->x = xoffset + 600;
        traits->y = yoffset + 0;
        traits->width = 600;
        traits->height = 480;
        traits->windowDecoration = true;
        traits->doubleBuffer = true;
        traits->sharedContext = 0;    
        traits->readDISPLAY();
        traits->setUndefinedScreenDetailsToDefaultScreen();

        osg::ref_ptr<osg::GraphicsContext> gc 
            = osg::GraphicsContext::createGraphicsContext(traits.get());

        osg::ref_ptr<osg::Camera> camear = new osg::Camera;
        camera->setGraphicsContext(gc.get());
        camera->setViewport(new osg::Viewport(0.0, traits->width, traits->height));
        GLenum buffer = traits->doubleBuffer ? GL_BACK :GL_FRONT;
        camera->setDrawBuffer(buffer);
        camera->setReadBuffer(buffer);

        viewer.addSlave(camear.get(), osg::Matrixd::translate(-1.0, 0.0, 0.0), osg::Matrixd());
    }

    osgUtil::Optimizer optimizer;
    optimizer.optimize(loadedmodel);

    viewer.setSceneDat(loadedModel);

    return viewer.run();
}