[SOLVED] Capture image of a node

[Antoine.YVAN]

Hello World !

I am asking for help to capture an image of a node.

Here is what I need to do :

1. Have the screenshot saved
2. See the camera view in the screenshot
3. See the node in the screenshot

And here is what happens:

1. Screenshot is saved - OK
2. We can see the camera view - OK
3. The node is not in the screenshot - NOT OK

What I do (after checking the sample "Screenshot") :

• In WorldLogic.init():
  • Load a node in my world with World::loadnode();
  • Place the camera in order to see the node (player->setWorldTransform)
  •     PlayerSpectatorPtr player = PlayerSpectator::create();

        Game::setPlayer(player);

        NodePtr node = World::loadNode("test.node");

        BoundBox bb = node->getBoundBox();

        player->setWorldPosition(Vec3(bb.getMax()) * 10);

        player->worldLookAt(node->getWorldPosition());
• In WorldLogic.update():
  • Create my TexturePtr if it does not exist and set its size to the size of the app
  •     if(!_screenTexture){

            _screenTexture = Texture::create();

            _screenTexture->create2D(App::getWidth(), App::getHeight(), Texture::FORMAT_RGBA8, Texture::FILTER_POINT | Texture::USAGE_RENDER);

        }
• In WorldLogic.beforeSwap():
  • if (_screenTexture)

            _screenTexture->copy2D();
• In WorldLogic.swap():
  • Check if the screenshot was already taken
  • if no : Take the screenshot and save it.
  •     if(_takeScreenshot)

        {

            // Screenshot de l'objet

            ImagePtr image = Image::create();

            _screenTexture->getImage(image);

            if (!Render::isFlipped())

                image->flipY();

            image->convertToFormat(Image::FORMAT_RGB8);

            

            image->save("Resources/Test.png");

     

            _takeScreenshot = false;

        }

 

At the moment I have tried to use World::updateSpatial(); after loading the node but it does not change anything.

The next step is to load a list of nodes and take a screenshot of each one bye one, but if I can't even have the first one...

My main loop looks like that : 

 

AppSystemLogic system_logic;

    AppWorldLogic world_logic;

    AppEditorLogic editor_logic;

 

    // init engine

    Unigine::EnginePtr engine(UNIGINE_VERSION, argc, argv);

    

    engine->addSystemLogic(&system_logic);

    engine->addWorldLogic(&world_logic);

 

    world_logic.init();

 

    while (!engine->isDone())

    {

        engine->update();

        engine->render();

        

        world_logic.beforeSwap();

 

        engine->swap();

    }

How can I manage to see my node in the screenshot ? Are there steps that I missed ?

And if I want to do that for a list of 10 nodes. Is there something else to do like waiting for the nodes to render ?

Tell me if you need any more information. 

Thanks for your time,

Best regards.

Antoine

[silent]

Hi Antoine,

Have you tried to set the streaming mode to force via Render::setStreamingMode(Render::STREAMING_FORCE). That in theory should help to avoid any issues when you do the single frame captures.

Thanks!

[Antoine.YVAN]

Hi Silent,

It works as expected !

Thanks a lot.