[vtkusers] vtkImageViewer Problems

[nadine kempe]

Hello,

I work on a software to display and analyse 3D medical images. there for I use three vtkKWRenderWidget, each of them shows me one orthogonal view of the data and allows me to scroll through the slices. I use the vtkImageViewer to display the actual slices.

So far, everything works fine. But now I want to display geometrie (points, lines...) in these images. So I create the points for the lines, pack them into a mapper and into an actor. then I add the actor to the rendere - but what I see is every part of the geometry which lies in front of the current slice - not only the part which is located in the current slice (whith the image data everything works fine, I only see the data in the current slice). 

Can somebody maybe tell me, why vtkImageViewer behaves like this? And how I can change it, to make the behavior it shows with geometry the same like with the data?

Hers is a part of my code, just if somebody wants to have a look:


   vtkPoints * pts = vtkPoints::New();
   pts->InsertPoint( 0, 30, 30, 30 );
   pts->InsertPoint( 1, 50, 50, 50 );

   vtkCellArray * line = vtkCellArray::New();
   line->InsertNextCell(2);
   line->InsertCellPoint(0);
   line->InsertCellPoint(1);

   vtkPolyData * polyLine = vtkPolyData::New();
   polyLine->SetPoints(pts);
   polyLine->SetLines( line );

   vtkPolyDataMapper *polyLineDataMapper = vtkPolyDataMapper::New();
   polyLineDataMapper->SetInput(polyLine);

   vtkActor *Lineactor = vtkActor::New();
   Lineactor->SetMapper(polyLineDataMapper);
   Lineactor->GetProperty()->SetColor(0,0,0);
   Lineactor->GetProperty()->SetLineWidth(5);
   Lineactor->GetProperty()->SetPointSize(5);

    this->RenderWidgetNW->ImageViewer->GetRenderer()->AddActor(Lineactor);


thanks a lot!
Nadine

(sorry for the other mail without content, I did  not want to send it)
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