[vtkusers] Covert UnstructuredGrid in PolyDataSet

[Leila Baghdadi]

Hi Samuel

I wrote my own class to do this when I was dealing with volume 
tetrahedral meshes and their triangular surface meshes but because it was 
very data specific (meshes of carotid artery) I did not contribute it to 
VTK and also because at the time I was using vtk3.2 and I had to make some 
changes before contributing it to vtk4.

You need to have a class/code which does something like vtkExtractGeometry 
or vtkExtractPolyDataGeometry, except that it gives you the right format, 
I am pretty sure I used these classes as an example when I was writing my 
class.

If it can help you, I can dig in to my old directories and give you a copy 
of my class.

hope this helps

Leila

On Wed, 20 Nov 2002, Samuel Rodríguez Bescos wrote:

> 
> Hello,
> 
> I'm using VTK for represent a mesh resulted of a pro cessing using ITK. In ITK there is a code that converts a  mesh in ITK in UnstructuredGrid of ITK: The problem is that I want to decimate and smooth this mesh and I noticed that these algorithms have to have a PolydataSet as its input. 
> 
> could anybody tell me if there is a way to transform vtkUnstructuredGrid to PolyDataSet?
> 
> Thanks in advance,
> 
> Sam 
>