[vtkusers] Help..about use normal vector to find point...

[David Doria]

On Thu, Jan 14, 2010 at 2:35 PM, renlishen <renlishen at gmail.com> wrote:
>
> hi everyone
> I have a question after using vtkPolyDataNormals
>
> My code is below
> ===========================================================================
> vtkFloatArray *PointNormalArray = vtkFloatArray::SafeDownCast(
> MyvtkPolyDataNormals()->GetOutput()->GetPointData()->GetNormals() ) ;
>        float pointNormal[ 3 ] ;
>
>        for( int i = 0 ; i < PointNormalArray->GetNumberOfTuples() ; i++ )
>                {
>                        PointNormalArray->GetTupleValue( i, pointNormal ) ;
>                }
> ===========================================================================
>
> When I get the point's normal from "PointNormalArray->GetTupleValue( i,
> pointNormal )"
> How can I know the point's coordinate?
>
> thanks for your help..
> RenLi
>

You don't show the input to the PolyDataNormals filter, but shouldn't
it just be;

double p[3];
input->GetPoint(i,p);

?

David