[vtkusers] vtkContourFilter not working on vtkStructuredGrid

[Darshan Pai]

just wondering. The first parameter to the GenerateValues(). Isn't it the
number of contours that you want?

You have set it to zero . so no contours will be drawn ..

Regards
Darshan

On Thu, Mar 11, 2010 at 10:51 AM, da <frinxor at gmail.com> wrote:

> Try a vtkAssignAttribute filter before the contour filter.
>
> vtkAssignAttribute assignFilter = vtkAssignAttribute::New();
> assignFilter->SetInput(sGrid);
> assignFilter->Assign( {your scalar array name},
> vtkDataSetAttributes::Scalars, vtkAssignAttribute::CELL_DATA);
>
> ...
> scalarIsoSurface->SetInputConnection(assginFilter->GetOutputPort() );
>
>
> On Fri, Mar 5, 2010 at 6:41 AM, Sebastian Gatzka <
> sebastian.gatzka at stud.tu-darmstadt.de> wrote:
>
>>  Hello.
>>
>> I really can't tell why my code is not gernerating the iso-surface.
>> I have a structured grid (sGrid) filled with scalars.
>>
>> I call the contour filter
>>
>>             vtkContourFilter *scalarIsoSurface = vtkContourFilter::New();
>>             scalarIsoSurface->SetInput(sGrid);
>>             scalarIsoSurface->GenerateValues(0,0.1);
>>
>> Compute the normal
>>
>>             vtkPolyDataNormals *sGridPolyDataNormal =
>> vtkPolyDataNormals::New();
>>             sGridPolyDataNormal->SetInput(scalarIsoSurface->GetOutput());
>>
>> Put them into a poly data mapper
>>
>>             vtkPolyDataMapper *scalarIsoSurfaceMapper =
>> vtkPolyDataMapper::New();
>>
>> scalarIsoSurfaceMapper->SetInput(sGridPolyDataNormal->GetOutput());
>>
>> and into an actor
>>
>>             vtkActor *scalarIsoSurfaceActor = vtkActor::New();
>>             scalarIsoSurfaceActor->SetMapper(scalarIsoSurfaceMapper);
>>
>> which is passed on to the scene
>>
>>             ren1->AddActor(scalarIsoSurfaceActor);
>>
>> and NOTHING happens.
>>
>> Any ideas what I have missed, or whats wrong?
>>
>> Sebastian
>>
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