Hi All,
I'm usign mitk. 0.7 version. I had alredy tried to with
InsertForeGroundRenderer but I still got the same problem.
renderWindow.GetRenderWindow2()->GetVtkLayerController()->InsertForegroundRenderer(ren,
true);
the hello message appears only a very little time, then the image seems to
cover it.
I also tried with your suggestion:
mitk::OpenGLRenderer* aux = static_cast<mitk::OpenGLRenderer*>(
renderWindow.GetRenderWindow2()->GetRenderer());
aux->WriteSimpleText( 50, 50, "HELLO!");
aux->UpdateIncludingVtkActors;
The difference is than I see nothing now!
I would appreciate your help,
Thanks in advance,
On Mon, Feb 25, 2008 at 1:09 PM, Baumhauer Matthias <
[EMAIL PROTECTED]> wrote:
> Martín,
>
>
>
> which version of MITK are you using?
>
>
>
> For current SVN (MITK > 0.8) the mitk::vtkPropRenderer allows for simple
> text displaying (see
> http://www.mitk.org/documentation/doxygen/classmitk_1_1VtkPropRenderer.html
> ).
>
> A similar function is also included in the mitk::openGLRenderer for MITK
> <= 0.8 (see
> http://www.mitk.org/documentation/mitk-0.8/classmitk_1_1OpenGLRenderer.html
> ).
>
>
>
> Having a quick look at your code is suggest that the
> InsertBackgroundRenderer(ren,
> true); call results in rendering the text behind all other MITK related
> stuff (in particular, rendering all datatree nodes). Since your text shall
> be displayed in front of the DataTreeNodes, I suppose you should call
> InsertForegroundRenderer() of the mitkVtkLayerController in order to add
> your new vtkRenderer to the vtkRenderWindow of the widget.
>
>
>
> SetErase(0) will be necessary in order to avoid the new vtkRenderer from
> clearing the OpenGL scene.
>
>
>
> Regards
>
>
>
> Matthias Baumhauer Phone: (+49) 6221/42-2328
>
> Deutsches Krebsforschungszentrum Fax: (+49) 6221/42-2345
>
> Div. Medical and Biological Informatics (E130)
>
> Im Neuenheimer Feld 280 email: [EMAIL PROTECTED]
>
> D-69120 Heidelberg, Germany
> http://www.dkfz-heidelberg.de/de/mbi
>
>
>
>
> *Von:* [EMAIL PROTECTED] [mailto:
> [EMAIL PROTECTED] *Im Auftrag von *Martín
> Bianculli
> *Gesendet:* Montag, 25. Februar 2008 12:39
> *An:* [email protected]
> *Betreff:* [mitk-users] Text Display
>
>
>
> I'm new to MITK and I would like to:
>
> Display a text string (vtkCornerAnnotation) overlapping an Image, using
> QmitkStdMultiWidget render Window
>
> Problems I encounter:
> 1)The text appears in corner 1, but immediately disappears
> 2)A white box appears, covering the whole window1, covering the image,
> which is not displayed
> 3)If I resize the window, the white box disappears, and the image is
> rendered
> 4)As I use a QmitkStdMultiWidget, If I change the window where I like to
> display the text (let's say to window2), the text appears and the white box
> doesn't appears, and then the text immediately disappears
>
>
> In order to do display the text, I create a vtkCornerAnnotation, a vtk
> renderer, add the vtkActor2D (vtkCornerAnnotation inherits from vtkActor2D)
> to the renderer and display it in window1.
>
> When I run the application, the text is displayed for about 0.5 seconds,
> then it disappears. Another strange behaviour is that a white box appears,
> covering the whole window1. Then, if I resize the main window, the box also
> disappears, and the image is display. That means that the image and the text
> (in my case the white box!) are never displayed together, maybe because the
> white box is as big as the whole window. I also tried to set the text as
> foreground, but the behaviour is the same.
>
> I also tried not to load an image, and the text is correctly display in
> any window (window1 as well as window2), without the white box! It seems
> like the text remains in the background (?). I tied to change it to the
> foreground but I also achieved negative results
>
> Here is the most relevant part of my code:
>
> //basic mitk initialization and image loading
> mitk::DataTree::Pointer tree=mitk::DataTree::New();
> mitk::DataTreePreOrderIterator it(tree);
>
> mitk::DataTreeNodeFactory::Pointer nodeReader;
> nodeReader = mitk::DataTreeNodeFactory::New();
> nodeReader->SetFileName( filename ); //filename is an Image
> nodeReader->Update();
>
> mitk::DataTreeNode::Pointer node;
> node = nodeReader->GetOutput();
> it.Add(node);
>
>
>
> QHBox toplevelWidget;
> toplevelWidget.setSpacing(1);
>
> QmitkStdMultiWidget renderWindow(&toplevelWidget);
> renderWindow.SetData(&it); //if I comment this line, the text is correctly
> displayed,
> renderWindow.InitializeStandardViews(&it);
> renderWindow.Fit();
> renderWindow.EnableNavigationControllerEventListening();
>
>
> //create a cornerText Actor
> vtkCornerAnnotation *cornerText = vtkCornerAnnotation::New();
> cornerText->SetText(1,"Hello");
>
>
> vtkRenderer *ren = vtkRenderer::New();
>
> // Add the actors
> ren->AddActor(cornerText);
> //ren->SetErase(0); //I tried both with and without this line but didn't
> work
>
> renderWindow.GetRenderWindow1()->GetVtkLayerController()->InsertBackgroundRenderer(ren,
> true);
>
> //renderWindow.GetRenderWindow1()->GetVtkRenderWindow()->SetErase(0); //I
> tried both with and without this line but didn't work
>
> dynamic_cast<mitk::OpenGLRenderer*>(renderWindow.GetRenderWindow1
> ()->GetRenderer())->UpdateIncludingVtkActors();
>
> //renderWindow.GetRenderWindow1()->RequestUpdate(); //I tried both with
> and without this line but nothing changed
>
> mitk::RenderingManager::GetInstance()->RequestUpdateAll();
>
> qtapplication.setMainWidget(&toplevelWidget);
> toplevelWidget.show();
>
> qtapplication.exec();
>
>
>
> Any help is deeply appreciated.
>
> Thanks in advance,
>
> --
> Martín
>
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--
Martín
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