[vtkusers] Glyphs on structuredGrid cell centers

[Sebastian Gatzka]

How does this work?
I have only found some strange 
file:///C:/Vtk%20Docs/html/classvtkCellCenterDepthSort.html stuff.

Am 22.02.2010 13:27, schrieb Dominik Szczerba:
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> Try passing your grid through CellCenters filter first.
>
> Sebastian Gatzka wrote:
>    
>>    Hello, me again.
>>
>> This time I'm facing trouble visualizing glyphs on my structured grid.
>> Suppose I have done it right there is some vector data:
>>
>> vtkFloatArray *v2 = vtkFloatArray::New();
>> v2->SetNumberOfComponents(3);
>> for (unsigned i = 0; i<  noCells; i++){
>>      v2->InsertNextTuple3(i,i,i);
>> }
>>
>> assigned to the structured grid cell centers:
>>
>> sGrid->GetCellData()->SetVectors(v2);
>>
>> Now creating some glyphs
>>
>> vtkConeSource *cone = vtkConeSource::New();
>> cone->SetResolution(6);
>>
>> vtkGlyph3D *glyph = vtkGlyph3D::New();
>> glyph->SetInput( *sGrid* );
>> glyph->SetSourceConnection(cone->GetOutputPort());
>> glyph->SetVectorModeToUseNormal();
>> glyph->SetScaleModeToScaleByVector();
>> glyph->SetScaleFactor(0.25);
>>
>> results in some arrows located at the structured grid points (sGrid)
>> instead of the cell centers.
>>
>>      * So how do I give vtkGlyph3D the cell centers of the structured
>>        grid as input?
>>      * And how does the gylph filter know it should represent the vector
>>        data?!
>>
>> Sebastian
>>
>>
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