[vtkusers] vtkSource::ComputeEstimatedPipelineMemorySize

[Naveen Kumar Polapally]

I have a problem where i have to estimate the size of the pipeline after 
every stage in the pipeline.When i used imaging pipelines i could use the 
method "ComputeEstimatedPipelineMemorySize".But I am unable to do so in case 
of Isosurfacing, even though vtkMarchingCubes has this method.When i try 
this method with vtkMarchingcubes all I get is Zero for size[0] and 
size[1].But i get the maximum pipeline size
size[2] encountered so far during this propagation.

How can i estimate the amount of data after the vtkPolyDataMapper and 
vtkActor , vtkRenderer, vtkRenderWindow ?

thank you.

naveen
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