[vtkusers] StruturedGrid and CellData

[Didier Roissé]

Thanks for the answer.
For the moment I convert my structured grid to unstructured but I will try
with GetFieldData().

Didier

2009/11/30 David E DeMarle <dave.demarle at kitware.com>

> You can't easily.
>
> vtkDataSet::GetCellData() will return the cell associated arrays, but
> those are defined to have values for every cell. There are some new
> sparse array types in vtk, but I haven't personally tried them. I
> suspect they are not allowed in the Cell/Point Data containers.
>
> An alternative is to use vtkDataSet::GetFieldData(), which returns
> general purpose (ie not cell or point associated arrays), and make up
> your own indexing scheme there.
>
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 28 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-371-3971 x109
>
>
>
> On Tue, Nov 24, 2009 at 8:17 AM, Didier Roissé <didier.roisse at gmail.com>
> wrote:
> > Hello,
> > I have a structured grid , and I want to put data on the different cells
> > inside the structured grid. I know how to do for unstructured grid, but
> for
> > structured grid I don't know.
> >
> > For example i define my structured grid like this:
> >     vtkStructuredGrid *sgrid = vtkStructuredGrid::New();
> >     sgrid->SetDimensions(x.nbnodes,y.nbnodes,z.nbnodes);
> >     vtkPoints *points = vtkPoints::New();
> >     for(int k=0;k<z.nbnodes;k++)
> >         for(int j=0;j<y.nbnodes;j++)
> >             for(int i=0;i<x.nbnodes;i++)
> >
> points->InsertNextPoint(x.nodes[i],y.nodes[j],z.nodes[k]);
> >
> >     sgrid->SetPoints(points);
> >
> >     vtkCell *cell3D = sgrid->GetCell(10);
> >
> > cell3D is a vtkHexaedron cell. So my problem is : How can I put a data
> value
> > only on one of the quad cell which define cell3D ?
> >
> > Thanks in advance for your help
> >
> > Regards,
> > Didier
> >
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