[vtkusers] vtkpolydata + scalars

[Rasmus Reinhold Paulsen]

Hi Gowri,


On Mon, 27 May 2002, Gopalakrishnan, Gowri wrote:

>  I use vtkPolyData -> GetPointData->SetScalars() to set the scalars and
> 
> And when I do the 
> 
> ->GetPointData->GetScalars - the vtkscalars I get is always null. I noticed
> two postings on this before without any answers.
> 
> Does any one have an idea how to extract the scalars?. Where are these
> scalars stored when you do ->GetPointData->SetScalars?

I use the following:

vtkFloatArray* scalars 
= (vtkFloatArray*)PD->GetOutput()->GetPointData()->GetScalars();

, Where PD is a vtkPolyDataReader object.

I am not sure that the cast is "good practice" but it works.

Regards,
Rasmus