[vtkusers] Generating Mesh from Contour Data?

[Bill Lorensen]

You should look at:
 	 vtkVoxelContoursToSurfaceFilter
described here:
http://www.vtk.org/doc/nightly/html/classvtkVoxelContoursToSurfaceFilter.html


Here is an example:
http://vtk.org/Wiki/VTK/Examples/Cxx/PolyData/ContoursToSurface


On Mon, Oct 4, 2010 at 5:38 AM, Ashika Umanga Umagiliya
<aumanga at biggjapan.com> wrote:
> Greetings all,
>
> I refered the post below on this topic ,
>
> http://vtk.1045678.n5.nabble.com/Creating-a-3D-surface-mesh-from-a-stack-of-contours-td1245753.html
>
> In the solution given below , I don't understand the variable "input_image"
> (which i assume of type vtkImageData).
> Is it the volume-data which is used to extract contours? Can't I generate
> mesh only using contours  without this image data?
>
>
> vtkAppendPolyData * app = vtkAppendPolyData::New();
>
> for (std::vector<vtkPolyData*>::iterator i = roi.contours.begin(); i !=
> roi.contours.end(); i++)
>         app->AddInput(*i);
>
>     vtkPolyDataWriter* w=vtkPolyDataWriter::New();
>     vtkLinearExtrusionFilter * extrude=vtkLinearExtrusionFilter::New();
>     extrude->SetInput(app->GetOutput());
>     extrude->SetVector(0, 0, 3);  //3 is the Z spacing between contours
>     extrude->CappingOn();
>     extrude->Update();
>
>     vtkPolyDataToImageStencil* sts=vtkPolyDataToImageStencil::New();
>     vtkImageStencil* stencil=vtkImageStencil::New();
>     sts->SetInput(extrude->GetOutput());
>     sts->SetInformationInput(input_image);   /////****** What is this
> input_image ?
>     sts->Update();
>     stencil->SetStencil(sts->GetOutput());
>     stencil->SetInput(input_image);
>
>     vtkSmartPointer<vtkMarchingCubes> marching =
> vtkSmartPointer<vtkMarchingCubes>::New();
>     marching->SetInput(stencil->GetOutput());
>     marching->SetValue(0,0.5);
>     marching->Update();
>
>
>
> Thanks in advance.
>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>
>