[vtkusers] How to extract values of vtkpoint coordinates from vtkXMLPolyDataReader

[Cory Quammen]

Chiranjib,

vtkDataArray * array = polydata->GetPointData()->GetArray(arrayname);

A simple way to get individual components is with

double * tuple = new double[array->GetNumberOfComponents()];
array->GetTuple(desiredpoint, tuple);
delete[] tuple;

HTH,
Cory

On Wed, Aug 19, 2015 at 2:05 AM, Chiranjib Sur <sur.chiranjib at gmail.com>
wrote:

> I think, I have sent this email too quickly. Other than the point
> coordinates, if I want to obtain the value of the point attributes, how do
> I do that.
>
> I can understand the point coordinates can be obtained by
>
> polydata->GetPoints(Id,desirtedpoint).
>
> What are the alternatives to know the point attributes (scaler/vector) for
> the points.
>
> Thanks again,
> Chiranjib
>
>
> ---------- Forwarded message ----------
> From: Chiranjib Sur <sur.chiranjib at gmail.com>
> Date: Wed, Aug 19, 2015 at 11:31 AM
> Subject: How to extract values of vtkpoint coordinates from
> vtkXMLPolyDataReader
> To: VTK Users <vtkusers at vtk.org>
>
>
> Hi,
> I want to extract the value of the XMl attributes (e.g. the coordinates of
> the VTk points, PointData/Points/DataArray).
>
> I am able to read the file using vtkXMLPolyDataReder and view it in
> ParaView but I want to extract values individually.
>
> How do I do that?
>
> Thanks,
> Chiranjib
>
>
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-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
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