[Insight-users] BufferedRegion in DataObjects

[Miller, James V (Research)]

Tobias, 

This is by design.  It is a mechanism to determine whether the request is different
from what the filter previously generated.  This mirrors the design of ImageFilters
where the GenerateData() method typically calls

output->SetBufferedRegion( output->GetRequestedRegion() );
output->Allocate();

Basically, this tells the pipeline "what" data was actually generated (verses what
was requested).

Jim

-----Original Message-----
From: insight-users-bounces+millerjv=crd.ge.com at itk.org
[mailto:insight-users-bounces+millerjv=crd.ge.com at itk.org]On Behalf Of
Tobias Heimann
Sent: Wednesday, August 17, 2005 5:42 AM
To: Insight-users at itk.org
Subject: [Insight-users] BufferedRegion in DataObjects


Hi all,

While writing some new filters with meshes as output, I noticed that 
somewhere in my GenerateData() method, I have to call 
"outputMesh->SetBufferedRegion( 0 );", otherwise the filter will 
re-execute every update call because 
RequestedRegionIsOutsideOfTheBufferedRegion() for the output mesh will 
always return true. Is this intended (i.e. setting the buffered region 
explicitly) or am I missing something?

Thanks in advance,
Tobias

-- 
Dipl.-Inform. Med. Tobias Heimann
Deutsches Krebsforschungszentrum         (German Cancer Research Center)
Div. Medical and Biological Informatics B010      Tel: (+49) 6221-423548
Im Neuenheimer Feld 280                           Fax: (+49) 6221-422345
D-69120 Heidelberg                              email: T.Heimann at dkfz.de
Germany                       http://www.dkfz.de/mbi/people/tobiash.html

_______________________________________________
Insight-users mailing list
Insight-users at itk.org
http://www.itk.org/mailman/listinfo/insight-users