[vtkusers] Re: Re: calculate normal of boundary

[Fabian Braennstroem]

Hi Pierre Barbier,

Pierre Barbier de Reuille wrote:

> Hello,
> 
> so reading the file is the easy part. For that, you want to use
> vtkImageReader2 (see documentation).
> As for the normal of the boundary, the first question is: how is defined
> this boundary?
> If this is defined as an iso-surface of some function, then you can use
> the vtkMarchingContourFilter object to find it and then vtkPolyDataNormals
> to get the normals of your surface it should work. If you get the mesh by
> any other means, you can still use vtkPolyDataNormals to get the normals
> to the mesh.

Thanks for your help! Maybe I forgot to explain, I read an ensight or vtk
formated data file, so there might be a chance to get the wanted face
directly... thanks!
Fabian