[Paraview] Custom plugin reader with time series

[Dominik Szczerba]

I followed the Wiki and moved my reader to internal_sources, and added 
corresponding entry to 'sources' with

<SubProxy>
<Proxy name="Reader" proxygroup="internal_sources" 
proxyname="vtkHDF5ImageReader">
</Proxy>
</SubProxy>

(the rest copy/paste from the original readers.xml)

Now opening my files in PV results in:

ERROR: In 
/scratch/domel/src/ParaView3-cvs-20080505/Servers/ServerManager/vtkSMProxyManager.cxx, 
line 329
vtkSMProxyManager (0x81882e8): No proxy that matches: group=sources and 
proxy=vtkHDF5ImageReader were found.

Failed to create proxy:  "sources" ,  "vtkHDF5ImageReader"
Error opening file

Of course, it is now in internal_sources! What have I missed?
I tried manipulating the cmake input or gui xml to now success.

Thanks and regards -- Dominik


Berk Geveci wrote:
> http://www.vtk.org/Wiki/Animating_legacy_VTK_file_series
> 
> Warning: The implementation may change somewhat in the future.
> 
> -berk
> 
> On Sun, May 11, 2008 at 4:31 AM, Dominik Szczerba
> <domi at vision.ee.ethz.ch> wrote:
>> OK so this is basically about reading the series myself explicitly. But one
>> thing is not clear to me: I am deriving my readers from vtkDataReader, after
>> UnstructuredGridReader and StructuredPointsReader, who can read time series
>> somehow, so this functionality must be already in somewhere (upstream).
>> There is no explicit time series handling in those classes and yet they
>> work, so why mine do not? I can see that you do derive your reader from
>> vtkUnstructuredGridAlgorithm, and not vtkDataReader, why? I wonder if I
>> really have to re-implement it and if there is no simpler way to achieve the
>> goal, like taking advantage of some existing functionality.
>> Thanks, Dominik
>>
>> Mike Jackson wrote:
>>> Take a look at
>>> <http://titanium.imts.us/viewvc/Task_4/PVDislocation/src/DislocationReaders/vtkPrdsMultiOutDislocationReader.cxx?view=markup>
>>>  to see how I did a time series reader.
>>>
>>> Basically in RequestInformation  you will need to determine the the
>>> range of times that your data covers, probably by opening each file or
>>> some other means. Then set
>>>    double timeRange[2];
>>>    timeRange[0] = lowestTimeValue
>>>    timeRange[1] = highesetTimeValue
>>>    outInfo->Set(vtkStreamingDemandDrivenPipeline::TIME_RANGE(),
>>> timeRange, 2);
>>>
>>> Also, you will need to have the following in your header:
>>>
>>>   vtkSetMacro(TimeStep, int);
>>>   vtkGetMacro(TimeStep, int);
>>>
>>>  int GetNumberOfTimeSteps();
>>>
>>> Now, down in the RequestData() Method you can get the requested time
>>> step from the
>>> pipeline and then open and read the data from the proper data file.
>>>
>>> int tsLength =
>>> outInfo->Length(vtkStreamingDemandDrivenPipeline::TIME_STEPS());
>>>  double* steps =
>>> outInfo->Get(vtkStreamingDemandDrivenPipeline::TIME_STEPS());
>>>  // Check if a particular time was requested.
>>>  if(outInfo->Has(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEPS()))
>>>  {
>>>    // Get the requested time step. We only supprt requests of a single
>>> time
>>>    // step in this reader right now
>>>    double *requestedTimeSteps =
>>> outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEPS());
>>>    this->TimeValue = requestedTimeSteps[0];
>>>
>>>    // find the first time value larger than requested time value
>>>    // this logic could be improved
>>>    int cnt = 0;
>>>    while (cnt < tsLength-1 && steps[cnt] < this->TimeValue)
>>>      {
>>>      cnt++;
>>>      }
>>>    this->ActualTimeStep = cnt;
>>>  }
>>>
>>>  if (this->TimeStep > -1)
>>>  {
>>>    this->ActualTimeStep = this->TimeStep;
>>>  }
>>>
>>>  if (this->ActualTimeStep >= this->TimeStepRange[0] &&
>>> this->ActualTimeStep <= this->TimeStepRange[1]) {
>>>    vtkSmartPointer<DislocationReader> reader =
>>> vtkSmartPointer<DislocationReader>::New();
>>>    reader->SetFileName(this->FileName);
>>>    reader->SetTimeStep(this->ActualTimeStep);
>>>    //reader->SetInformationVector(outputVector);
>>>    reader->SetFileOffsets(this->FileOffsets);
>>>    reader->read();
>>>    vtkUnstructuredGrid* grid;
>>>    grid = reader->GetDislocations();
>>>    dislocations->ShallowCopy(grid);
>>>
>>>   // dislocations->SetBlock(0, grid);    // Block 0 is the Dislocation
>>> Data
>>>    grid = reader->GetSimulationBox();
>>>    simBox->ShallowCopy(grid);
>>>    //dislocations->SetBlock(1, grid); // Block 1 is the Simulation Limits
>>>  } else {
>>>      std::cout << "vtkPrdsMultiOutDislocationReader: Timestep was out
>>> of Range: " << this->ActualTimeStep << std::endl;
>>>      std::cout << "vtkPrdsMultiOutDislocationReader: Timestep Range:"
>>> << this->TimeStepRange[0] << " -> " << this->TimeStepRange[1] <<
>>> std::endl;
>>>      return 0;
>>>  }
>>>
>>>
>>> This code is specific to my case where I have a whole separate reader
>>> for my data where I feed it the name of the file to read and then tell
>>> it to read the file and get the output. This may also be the case for
>>> you also.
>>>
>>> Hope some of the helps.
>>>
>>> Mike
>>>
>>> On Sat, May 10, 2008 at 6:03 AM, Dominik Szczerba
>>> <domi at vision.ee.ethz.ch> wrote:
>>>> Hi,
>>>> I have successfully implemented a reader for my data as a PV plugin. It
>>>> loads separate files correctly, refuses, however, to read the whole
>>>> series
>>>> (file_01.h5, file_02.h5, etc.). How do I go about achieving the same
>>>> effect
>>>> as the native readers to have a series as transient data?
>>>> Thanks for any hints.
>>>> --
>>>> Dominik Szczerba, Ph.D.
>>>> Computer Vision Lab CH-8092 Zurich
>>>> http://www.vision.ee.ethz.ch/~domi
>>>> _______________________________________________
>> --
>> Dominik Szczerba, Ph.D.
>> Computer Vision Lab CH-8092 Zurich
>> http://www.vision.ee.ethz.ch/~domi
>> _______________________________________________
>> ParaView mailing list
>> ParaView at paraview.org
>> http://www.paraview.org/mailman/listinfo/paraview
>>

-- 
Dominik Szczerba, Ph.D.
Computer Vision Lab CH-8092 Zurich
http://www.vision.ee.ethz.ch/~domi