[vtkusers] help with marchingcubes with dicom slices set

[Rodrigo Lovera]

I tried with your values, but now i'm getting a black screen, no volume or
shape at all.



Rodrigo Lovera Sandoval


2012/11/16 kingvsk at aol.com <kingvsk at aol.com>

>  Hi
>
> Change the value in following line.
> surface->SetValue(0, 5);
>
> Instead of 5 you can use 500 (Bone) or -500 (Skin).
>
> That is, try either *surface->SetValue(0, 500);* or *surface->SetValue(0,
> -500); *
>
> --
> Sathish
>
>
> On Saturday 17 November 2012 02:46 AM, Rodrigo Lovera wrote:
>
>
> Hello everyone,
>
>  I've got a set of dicom slices which I use for rendering a volume, now I
> tried to apply marching cubes to try surface rendering buy i'm only getting
> some kind of box and not the head that shold be forming.
>
>  I'm using atm the following code
>
>  vtkSmartPointer< vtkDICOMImageReader > reader =
>  vtkSmartPointer< vtkDICOMImageReader >::New();
>  reader->SetDataByteOrderToLittleEndian();
>  //reader->SetDirectoryName(argv[1]);
>  reader->SetDirectoryName("C:\\VTK5.10\\DATA\\DICOM");
>  reader->SetDataSpacing(1, 1, 1);
>  reader->SetDataOrigin(0.0, 0.0, 0.0);
>  reader->Update();
>
>  vtkSmartPointer< vtkMarchingCubes > surface =
>  vtkSmartPointer< vtkMarchingCubes >::New();
>  surface->SetInputConnection(reader->GetOutputPort());
>  surface->ComputeNormalsOn();
>  surface->SetValue(0, 5);
>   vtkSmartPointer< vtkRenderer > surfacerenderer =
>  vtkSmartPointer< vtkRenderer >::New();
>  surfacerenderer->SetBackground(0.1, 0.2, 0.3);
>
>  vtkSmartPointer< vtkRenderWindow > renderwin =
>  vtkSmartPointer< vtkRenderWindow >::New();
>  renderwin->AddRenderer(surfacerenderer);
>   vtkSmartPointer< vtkRenderWindowInteractor > intersurf =
>  vtkSmartPointer< vtkRenderWindowInteractor >::New();
>  intersurf->SetRenderWindow(renderwin);
>
>  vtkSmartPointer< vtkPolyDataNormals > premapper =
>  vtkSmartPointer< vtkPolyDataNormals >::New();
>  premapper->SetInputConnection(surface->GetOutputPort());
>  premapper->ComputeCellNormalsOn();
>   vtkSmartPointer< vtkPolyDataMapper > surfacemapper =
>  vtkSmartPointer< vtkPolyDataMapper >::New();
>  surfacemapper->SetInputConnection(premapper->GetOutputPort());
>  //surfacemapper->SetInputConnection(surface->GetOutputPort());
>
>  vtkSmartPointer< vtkActor > actor =
>  vtkSmartPointer< vtkActor >::New();
>  actor->SetMapper(surfacemapper);
>
>  vtkSmartPointer< vtkProperty > backFaces =
>  vtkSmartPointer< vtkProperty >::New();
>  backFaces->SetSpecular(0.0);
>  backFaces->SetDiffuse(0.0);
>  backFaces->SetAmbient(1.0);
>  backFaces->SetAmbientColor(1.0000, 0.3883, 0.2784);
>  backFaces->SetOpacity(256);
>
>  actor->SetBackfaceProperty(backFaces);
>
>  surfacerenderer->AddActor(actor);
>  renderwin->SetSize(800,600);
>  //renderWindow->Render();
>  intersurf->Start();
>
>  this->ui->vtksurface->GetRenderWindow()->AddRenderer(surfacerenderer);
>
>  I'd appreciate any kind of help, example code or advice. Thx in advance.
>
>  --
> *Rodrigo Lovera *
>
>
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-- 
*Rodrigo aka WarHearT*
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