[Paraview-developers] Source info "memory" problem

[Burlen Loring]

Hi Michael,

That sounds like what would happen if your filter delete's its input 
when it's destroyed. It could be some other modification made to the 
input too, like removing all the cells or something like that. The rule 
is don't modify the input data, if need to make a copy. I couldn't tell 
if you're doing this or not from because you pass the input dataset into 
MDEWRebinningPresenter constructor. But that'd be the first possibility 
to eliminate. Are you sure you're not modifying the input dataset?

Burlen


On 11/21/2013 11:29 AM, Reuter, Michael A. wrote:
> Hi,
>
> I have a weird problem of a source losing its "memory" after applying a plugin. The source is from a reader that can handle data with or without time step information (see Before_Plugin.jpg showing data with time steps). I then apply a plugin (rebinner) that allows me to alter the number and/or range of the time steps. In this case, I'm leaving both the range and number the same, but changing these doesn't seem to matter to the problem. I wanted to go back to the original source, so I deleted the rebinner plugin, and I found that the original source had lost not only its time info, but the array it was looking at was also gone (see After_Plugin.jpg) and data no longer appears in the view. If I do the same exercise using the reader and rebinner but for data without time steps, the original source doesn't lose its "memory". Therefore, this has something to do with time info handling. I'm having this issue in 3.98.1, but I've tested against 4.1.0-RC1 and see the same issue. I thought about trying to catch the time step issue in RequestData, but UPDATE_TIME_STEP is returning values, however, they are the wrong ones. The slightly bigger concern is the loss of the signal array from the source. I tried using RequestUpdateExtent to replace the time info in the reader, but this caused more issues and didn't fix the original problem. Is there anything obvious I'm overlooking that I should be investigating further?
>
> The source for the reader is here:
> https://github.com/mantidproject/mantid/blob/master/Code/Mantid/Vates/ParaviewPlugins/ParaViewReaders/MDEWNexusReader/vtkMDEWNexusReader.cxx
>
> The source for the rebinner is here:
> https://github.com/mantidproject/mantid/blob/master/Code/Mantid/Vates/ParaviewPlugins/ParaViewFilters/MDEWRebinningCutterOperator/vtkMDEWRebinningCutter.cxx
>
> Thanks,
> M
>
> Dr. Michael Reuter
> Data Analysis and Visualization Group
> Neutron Data Analysis and Visualization Division
> Oak Ridge National Laboratory
>
> Office: 1-865-241-7216
> Fax: 1-865-574-6080
> Email: reuterma at ornl.gov
>
>
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