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

[Cory Quammen]

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,
though.

HTH,
Cory

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?
>
>
>
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-- 
Cory Quammen
Staff R&D Engineer
Kitware, Inc.