[vtkusers] pipeline question

[Mohamed Amine Mzoughi]

Hello Gerald,

I also noticed that in Catalyst (look at my last message here : 
https://discourse.paraview.org/t/is-it-possible-to-add-new-connections-to-a-fitler-port-via-the-pipeline-browser/1149/7) 
:

I have a vtk HDF writer in which I tested adding a second connection in 
Port 0, but with 2 connections, 
vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP doesn't contain an 
epoch anymore but incremental reals in both connections (2 filters output).

So, if someone can give us an explanation and a fix that would be great 
? I wish there's a good resource explaining and demystifying VTK 
pipeline architecture.

Regards.

Le 30/01/2019 à 14:26, Lodron, Gerald a écrit :
>
> ah, ok, great. i already found that FROM_OUTPUT_PORT after parsing 
> many examples. But did not check for -1. Thanks…
>
> I also noticed a starnge behaviour in time:
>
> When I use TIME_STEPS in RequestInformation with a double array of 
> descrete (e.g.1,2,3,4) values, shouldn’t I get only those requests 
> from paraview (so that i do not need to recompute e.g. requests of 1.1 
> and 1.2 which will be both 1 from TIME_STEPS)?
>
> I still get continues values from UPDATE_TIME_STEP, e.g. 1.1 and 1.2. 
> Is that behaviour a bug or a feature?
>
> best regards
>
> Gerald
>
> *Von:*David Gobbi <david.gobbi at gmail.com>
> *Gesendet:* Mittwoch, 30. Januar 2019 14:20
> *An:* Lodron, Gerald <Gerald.Lodron at joanneum.at>
> *Cc:* (vtkusers at vtk.org) <vtkusers at vtk.org>
> *Betreff:* Re: [vtkusers] pipeline question
>
> On Wed, Jan 30, 2019 at 12:58 AM Lodron, Gerald 
> <Gerald.Lodron at joanneum.at <mailto:Gerald.Lodron at joanneum.at>> wrote:
>
>     I made a vtk source with 5 outputs and time data. I am getting the
>     requested time from output 0. I included the source into paraview.
>     The problem is that the request Data function gets called 5 times
>     (because of 5 outputs). Is there a way to get the output port
>     index of the requested data function call?
>
> int outputPort = 
> request->Get(vtkDemandDrivenPipeline::FROM_OUTPUT_PORT());
>
> if outputPort has the special value -1, then all outputs should be 
> generated.
>
>    David
>
>
>
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