[vtkusers] About vtkPolyDataNormals....

[Bill Lorensen]

Your code says:
triangleCellNormals->ComputeCellNormalsOff() ;
so there will not be any cell normals computed.
Try
triangleCellNormals->ComputeCellNormalsOn() ;

On Wed, Nov 18, 2009 at 11:50 PM, renlishen <renlishen at gmail.com> wrote:
>
> I have seen the post "How to extract the average normal from
> vtkPolyDataNormals",
> and I try to do the same thing
> ------------------------------------------------------
>        vtkPolyDataNormals *triangleCellNormals = vtkPolyDataNormals::New() ;
>        triangleCellNormals->SetInput(
> triangleCellDataSetSurfaceFilter->GetOutput() ) ;
>        triangleCellNormals->ComputeCellNormalsOff() ;
>        triangleCellNormals->ComputePointNormalsOn() ;
>        triangleCellNormals->ConsistencyOn() ;
>        triangleCellNormals->AutoOrientNormalsOn() ;
>        triangleCellNormals->Update() ;
>
>        vtkFloatArray *PointNormalArray = vtkFloatArray::SafeDownCast(
> triangleCellNormals->GetOutput()->GetCellData()->GetNormals() ) ;
> -------------------------------------------------------
> My question is ..I can't connect GetCellData() to GetNormals()..
> If the method is wrong, how can I do to get normals?
>
> I can display, but my goal is to get points' normal....
> p.s. I am using VTK5.4.2...
>
> thanks for your help~!!
> http://old.nabble.com/file/p26420378/1.png
> --
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