[vtkusers] vtkPolydataNormals

[Sara Rolfe]

Hello,

I'm using vtkPolydataNormals to calculate the normal vectors on the  
surface of a closed mesh.  What I wanted to get was the normal  
vectors, pointing out, from each point on the surface.  However, what  
I'm getting is normal vectors, half of which point in toward the mesh  
surface, and half which point out.  Is there a way to correct this?

I'm attaching a image showing some of the normals, where the problem  
can be seen.

Thanks,
Sara

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