[vtk-developers] A filter that does the opposite of vtkImageDataStreamer?

[David Gobbi]

Trying again:

Is there a flag that the user can set on a vtkAlgorithm to force it to
always request the whole extent from its input?

I'm guessing the answer is "no" because I don't see any code in
vtkStreamingDemandDrivenPipeline.cxx that would support such a
feature, but I'm wondering if I can get confirmation from other
developers who are familiar with the pipeline.

 - David


On Mon, Sep 22, 2014 at 12:22 PM, David Gobbi <david.gobbi at gmail.com> wrote:
> Hi All,
>
> This is a question about streaming in an imaging pipeline.  Sometimes
> I want to stream just part of whole extent through the pipeline, but
> even more often, I want to pull through the whole extent even if a
> downstream request is for just a single slice.
>
> Is there a trivial filter in VTK that, regardless of the UpdateExtent
> requested, will always request the WholeExtent from upstream?
> I say "trivial" because it would indeed be a trivial filter to write.
> Has anyone else ever written or used such a filter?
>
> Basically, I'm looking for an easy way to turn streaming off at
> any point in my pipeline, either by inserting a "non-streaming filter"
> or by telling an existing filter not to stream.
>
>  - David