[vtkusers] Question about mixing 2d and 3d actors again...

[Anja Ende]

Hi everyone,

I was wondering if anyone has successfully displayed a 3d actor over a 2d
actor and be willing to share an example.

I tried but unsuccessfully... I am only either able to show the 3d actor
that is scaled and my 2d actor is not visible or I see nothing at all. I
tried setting camera stuff (especially with  parallel projection) but did
not really work. I guess I am shooting in the dark here...

I am trying to do something simple like:

// Add our 2d actor
this->m_renderer->AddActor(this->m_actor2D);

vtkPNGReader * cursorImage = vtkPNGReader::New();
cursorImage->SetFileName("/home/anja/bin/crosshair.png");
cursorImage->Update();

vtkImageActor * actor = vtkImageActor::New();
actor->SetInput(cursorImage->GetOutput());
actor->PickableOn();
// Add the 3d actor.
this->m_renderer->AddActor(actor);
actor->Delete();
cursorImage->Delete();

// As per David's suggestion.
this->m_actor2D->GetProperty()->SetDisplayLocationToBackground();

this->m_renderer->GetActiveCamera()->ParallelProjectionOn();

Hope you can help me. Thanks again :)

I will keep trying and update this thread when this is solved. I think a lot
of newbies like me are struggling with this.

Cheers,

Anja
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