[vtkusers] Why two versions of UpdatePiece() for vtkXMLPolyDataReader

[Grothausmann, Roman Dr.]

Dear mailing list members,


VTK-7.1 introduced a change to the API concerning StreamingDemandDrivenPipeline 
(https://www.vtk.org/doc/nightly/html/VTK-7-1-Changes.html). I gethered from 
that, that

reader->SetUpdateExtent(0, myId, numProcs, 0);

needs to be changed to

reader->UpdatePiece(0, myId, numProcs, 0);

which works fine for e.g. vtkXMLImageDataReader but does not work for e.g. 
vtkXMLPolyDataReader, which under "all members" 
(https://www.vtk.org/doc/nightly/html/classvtkXMLPolyDataReader-members.html) 
has two UpdatePiece listed. It seems the one from vtkAlgroithm is needed. Is 
casting to vtkXMLDataReader/vtkAlgroithm the intended way to get to this?

Many thanks for any help or hints
Roman

-- 
Dr. Roman Grothausmann

Tomographie und Digitale Bildverarbeitung
Tomography and Digital Image Analysis

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

Tel. +49 511 532-2900
grothausmann.roman at mh-hannover.de
http://www.mh-hannover.de/anatomie.html