C++ GLUTWindowRefPtr::addPort方法代码示例

static void enableStaticScene()
{
    win->subPortByObj(dynamicVp);
    dynamicVp = nullptr;

    NodeUnrecPtr root = makeCoredNode<Group>();
    root->addChild(staticScene);
    mgr->setRoot(root);

    mgr->getNavigator()->setViewport(staticVp);

    staticVp->setCamera(camera);

    win->addPort(staticVp);
}

static void createDynamicViewport()
{
    win->subPortByObj(staticVp);

    FBOBackgroundUnrecPtr fboBckgnd = FBOBackground::create();
    fboBckgnd->setFrameBufferObject(spSimpleFBO->fbo());

    NodeUnrecPtr root = makeCoredNode<Group>();
    root->addChild(dynamicScene);

    mgr->setRoot(root);

    dynamicVp = Viewport::create();
    dynamicVp->setRoot      (rootNode(root));
    dynamicVp->setBackground(fboBckgnd);
    dynamicVp->setCamera    (camera);
    dynamicVp->setSize      (0,0, 1,1);

    mgr->getNavigator()->setViewport(dynamicVp);
    
    win->addPort(dynamicVp);

    mgr->update();
}

//
// setup of the image generation stage
//
static void createAcquisitionStage()
{
    size_t num_ports = win->getMFPort()->size();
    if (num_ports == 0)
        return;

    UInt32 width  = win->getWidth();
    UInt32 height = win->getHeight();

    Real32 a = Real32(width) / Real32(height);
    width = UInt32(a*height);

    Viewport* vp = staticVp;

    Node* internalRoot = rootNode(mgr->getRoot());

    //
    // Setup the FBO
    //
    spSimpleFBO.reset(new SimpleFBO(width, height, true, true, true, false));
    
    //spSimpleFBO->fbo()->setPostProcessOnDeactivate(true);
    //spSimpleFBO->colorBuffer(0)->setReadBack(true);

    //
    // We would like to render the scene but won't detach it from its parent.
    // The VisitSubTree allows just that.
    //
    VisitSubTreeUnrecPtr visitor = VisitSubTree::create();
    visitor->setSubTreeRoot(internalRoot);
    NodeUnrecPtr visit_node = makeNodeFor(visitor);

    //
    // The stage object does provide a render target for the frame buffer attachment.
    // SimpleStage has a camera, a background and the left, right, top, bottom
    // fields to let you restrict rendering to a sub-rectangle of your FBO, i.e.
    // they give you a viewport.
    //
    SimpleStageUnrecPtr stage = SimpleStage::create();
    stage->setRenderTarget(spSimpleFBO->fbo());
    stage->setCamera      (vp->getCamera());
    stage->setBackground  (vp->getBackground());
    //
    // Give the stage core a place to live
    //
    NodeUnrecPtr stage_node = makeNodeFor(stage);
    stage_node->addChild(visit_node);

    //
    //   root
    //    |
    //    +- SimpleStage
    //            |
    //            +- VisitSubTree -> ApplicationScene
    //
    NodeUnrecPtr root = makeCoredNode<Group>();
    root->addChild(stage_node);

    //
    // Give the root node a place to live, i.e. create a passive
    // viewport and add it to the window.
    //
    ViewportUnrecPtr stage_viewport = PassiveViewport::create();
    stage_viewport->setRoot      (stage_node);
    stage_viewport->setBackground(vp->getBackground());
    stage_viewport->setCamera    (vp->getCamera());

    win->addPort(stage_viewport);

    mgr->update();
    win->renderNoFinish(mgr->getRenderAction());
    win->frameExit();
    win->deactivate ();

    //ImageUnrecPtr col_image = Image::create();
    //col_image->set(Image::OSG_RGBA_PF, width, height);
        
    //TextureObjChunk* texObj = spSimpleFBO->colorTexObj(0);
    //texObj->getImage()->subImage(0, 0, 0, width, height, 1, col_image);
    //col_image->write("d:/my_Test_opensg.png");

    win->subPortByObj(stage_viewport);
}

//.........这里部分代码省略.........
        //
        // The stage object does provide a render target for the frame buffer attachment.
        // SimpleStage has a camera, a background and the left, right, top, bottom
        // fields to let you restrict rendering to a sub-rectangle of your FBO, i.e.
        // they give you a viewport.
        //
        SimpleStageUnrecPtr stage = SimpleStage::create();
        stage->setRenderTarget(fbo);
        stage->setCamera      (decorator);
        stage->setBackground  (vp->getBackground());
        //
        // Give the stage core a place to live
        //
        NodeUnrecPtr stage_node = makeNodeFor(stage);
        stage_node->addChild(visit_node);
        //
        //   root
        //    |
        //    +- SimpleStage
        //            |
        //            +- VisitSubTree -> ApplicationScene
        //
        NodeUnrecPtr root = makeCoredNode<Group>();
        root->addChild(stage_node);
        //
        // Give the root node a place to live, i.e. create a passive
        // viewport and add it to the window.
        //
        ViewportUnrecPtr stage_viewport = PassiveViewport::create();
        stage_viewport->setRoot      (root);
        stage_viewport->setBackground(vp->getBackground());
        stage_viewport->setCamera    (camera);

        win->addPort(stage_viewport);

        //
        // remember the decorator, the background tile prop setting and the stage setup
        //
        decorators[i] = boost::make_tuple(decorator, bTiled, stage, stage_viewport);
    }

    //
    // We write the image in simple ppm format. This one starts with a description
    // header which we output once on first write.
    //
    bool write_header = true;

    //
    // Calc the max y start position (width). We process the tiles from bottom
    // up and from left tp right as determined by the image format.
    //
    UInt32 yPosLast = 0;
    for (; yPosLast < height-winHeight; yPosLast += winHeight);

    //
    // Process from bottom to top
    //
    for (Int32 yPos = yPosLast; yPos >= 0; yPos -= winHeight)
    {
        UInt32 ySize = std::min(winHeight, height - yPos);

        //
        // Collect the tile images for each row, i.e. we write the
        // image in row manner to disk. This way the main memory is
        // only moderately stressed.
        //