[vtkusers] About vtkScalars, vtkVectors, vtkNormals, etc

[Mathieu Malaterre]

Hi Yuan,

   You can have a look to :
http://public.kitware.com/cgi-bin/vtkfaq?req=show&file=faq06.007.htp
and:
http://public.kitware.com/cgi-bin/vtkfaq?req=show&file=faq06.009.htp

You'll find that :
vtkScalars *scalars = vtkScalars::New();
scalars->SetNumberOfScalars(N_POINTS);

is replaced, for example, by:
vtkFloatArray *scalars = vtkFloatArray::New();
scalars->SetNumberOfComponents(1);
scalars->SetNumberOfTuples(N_POINTS);

Otherwise you can use any of the classes derived from vtkDataArray:
http://public.kitware.com/VTK/doc/nightly/html/classvtkDataArray.html)

HTH
mathieu

Yuan Jin wrote:

> Hi all,
>
> before I used vtk3.2 in which I can create instance of vtkScalars like
> below:
>
> vtkScalars *scalar = vtkScalars:New();
>
> anybody knows what I should do in vtk4.0?
>
> vtkDataArray *da = vtkDataArray::New()
> doesn't work since vtkDataArray is a abstract class.
>
> thanks
>
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--
Malaterre, Mathieu
The John P. Robarts Research Institute
Imaging Research Laboratories
http://www.imaging.robarts.ca/~mmalat