[vtkusers] vtkImageData Modified: Just update a small area of the data?

Cory Quammen cory.quammen at kitware.com
Tue Feb 28 09:12:37 EST 2017

Typically, no, you can't just tell the mapper to update a small
region. Not all filters, mappers, etc. support operating on only a
small part of the data.

You could manually split up your image into smaller images and have
mappers for each subregion. That way updates would occur only in the
subregion you have modified. I have done this approach for fast
updating of contours when the underlying data has been modified and it
works well. Not sure how it would work with multiple volume mappers,


On Tue, Feb 28, 2017 at 4:06 AM, Willy <Wiggerl at linhuber.info> wrote:

> Does really nobody have an answer on my question? A simple "That is just not
> possible" would be ok too. I just want to know.
> Can somebody at least explain what "SetUpdateExtent" means and how to use
> it?
> --
> View this message in context: http://vtk.1045678.n5.nabble.com/vtkImageData-Modified-Just-update-a-small-area-of-the-data-tp5742276p5742304.html
> Sent from the VTK - Users mailing list archive at Nabble.com.
> _______________________________________________
> Powered by www.kitware.com
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
> Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
> Search the list archives at: http://markmail.org/search/?q=vtkusers
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/vtkusers

Cory Quammen
Staff R&D Engineer
Kitware, Inc.

More information about the vtkusers mailing list