[vtkusers] can vtkXMLPolyDataReader not stream "manually"?

[Grothausmann, Roman Dr.]

Dear mailing list members,


Due to apparent index limitations for arrays I'm in the need to process a 
vtkPolyData in chunks. However, my streaming approach reads and processes all 
data not just sub-extents. Therefore, I tried to write a minimal example of 
streamed reading using vtkXMLPolyDataReader which is supposed to support 
streaming according to the docs. However this simple example seems not to stream:
https://github.com/romangrothausmann/VTK-CLIs/blob/master/read_SDP.cxx
I've only found unanswered similar questions on the mailing list and all other 
use of vtkStreamingDemandDrivenPipeline seems to be within a filter not outside. 
Still, on page 14 of 4_VTK-ParallelCompositeAndTime.pdf the same exemplary use 
of vtkStreamingDemandDrivenPipeline is given for "manual" updates.
Am I missing something in my example or can vtkXMLPolyDataReader not stream?

Any help or hints are very much appreciated
Roman

-- 
Dr. Roman Grothausmann

Tomographie und Digitale Bildverarbeitung
Tomography and Digital Image Analysis

Institut für Funktionelle und Angewandte Anatomie, OE 4120
Medizinische Hochschule Hannover
Carl-Neuberg-Str. 1
D-30625 Hannover

Tel. +49 511 532-2900