[vtkusers] vtkContourFilter not working on vtkStructuredGrid

[KS Jothybasu]

Yes, you are correct.

I should be GenerateValues(NumOfContours,Range)

Jothy

On Thu, Mar 11, 2010 at 7:24 PM, Darshan Pai <darshanpai at gmail.com> wrote:

> 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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>>
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>
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>
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