[vtkusers] Proxy class for vtkUnstructuredGrid

[Serge Lalonde]

Has anyone ever tried to create a vtkUnstructuredGrid proxy class to 
wrap their own mesh class?

We have our own code for meshes and would like to avoid converting the 
data from our format to the vtkUnstructuredGrid and instead have a 
wrapper class that uses aggregation to store an instance of our own mesh 
class (a triangular or a tetrahedral mesh) when this is added as the 
starting point of a pipeline. The APIs would be wrappers that would get 
our data and convert it to VTK data types.
This would avoid duplicating memory and speed up the pipeline by 
avoiding the potentially large amount of data translation from our 
format to VTK's.

Is this possible and/or practical?

Thanks.
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