[Paraview] To Id Or Not to Id?

[David E DeMarle]

Yes.

If the data needs a name (or Identifier) for every point, then we use a
point data vtkIdType attribute array and mark this array as the GLOBAL_IDS.
When this is done, then the point id for any given point is the value in the
id array for that point and not the point's index or location within the
point array.

cheers
Dave DeMarle


On 8/2/07, Kent Eschenberg <eschenbe at psc.edu> wrote:
>
> Is it true that the index of a point, in an array of points, is not always
> its
> "point id". For example, points at index 0,1,2 may have point ids of
> 27,19,42.
>
> I'm working on a filter with vtkStructuredGrid coming in and vtkPolyData
> going
> out. The output's points share the input's points and so their indexes are
> the
> same. The output's only geometry will be a vtkCellArray.
>
> The filter will generate a bunch of quads using point indexes. The problem
> is
> that I must add these quads to vtkCellArray using point ids.
>
> TIA!
> Kent
> Pittsburgh Supercomputing Center
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