[vtkusers] Subtracting polydata from polydata?

[Mathieu Malaterre]

When I search for such tool I found:

[M.E.S.H. : Measuring Error between Surfaces using the Hausdorff distance]
Description

MESH is a tool that measures distortion between two discrete surfaces 
(triangular meshes). It uses the Hausdorff distance to compute a 
maximum, mean and root-mean-square errors between two given surfaces. 
Besides providing figures, MESH can also display the error values on the 
surface itself.
The source code of MESH is available under the GNU General Public 
License. It requires the Qt library (available for free), and has been 
successfully tested on the following platforms(compilers):...

http://mesh.epfl.ch/

Mathieu
Ps: if I remeber correctly you have to export your data as iv

jarv0075 wrote:
>  
> 
> I'm currently trying to compare two rendered surfaces based on the same
> input MRI data to see what the differences are between the two.
> 
> I can think of a few ways to do this, but what would be the 'preferred'
> method?  I'm thinking some way of subtracting one dataset from another
> (leaving the rendered difference between the two)?  
> 
> If anyone has done something similar, what are some other meaningful
> visualization techniques to show the difference between two surfaces?
> 
> 
> 
> Thanks,
> 
> 
> 
> -Tim
> 
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