[原][osg]osg程序窗口化

    osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
    traits->x = 200;
    traits->y = 200;
    traits->width = 800;
    traits->height = 680;
    traits->windowDecoration = true;
    traits->doubleBuffer = true;
    traits->sharedContext = 0;

    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);