[vtkusers] Normals

[François Bertel]

* Solution: Add #include "vtkFloatArray.h"
* Rational: See the following links:

http://www.vtk.org/Wiki/VTK_FAQ#The_C.2B.2B_compiler_cannot_convert_some_pointer_type_to_another_pointer_type_in_my_little_program

or

http://www.vtk.org/Wiki/VTK_FAQ#Forward_declaration_in_VTK_4.x

Regards

Louis Desjardins wrote:
> Hi Experts,
> 
> I am trying to get the normals of my data set using the following code,
> where CellNormals and PointNormals are of type vtkFloatArray
> 
> GeometryFilter->SetInput( UnstructuredGrid );
> PolyDataNormals_orig->SetInput( GeometryFilter->GetOutput() );
> CellNormals =
> PolyDataNormals_orig->GetOutput()->GetCellData()->GetNormals();
> PointNormals =
> PolyDataNormals_orig->GetOutput()->GetPointData()->GetNormals();
> 
> However I get the error:
> invalid conversion from `vtkDataArray*' to `vtkFloatArray*'
> 
> ?? Why do I get this? vtkFloatArray *is* a vtkDataArray.. so whats the
> problem? Should I not be using vtkFloatArray? and of course vtkDataArray
> is an abstract class..
> anwyyas i know htis is silly but your help is appreciated
> thanks
> 
> ld
> 
> 
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François Bertel, PhD  | Kitware Inc. Suite 204
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