Hello,
So I am trying to figure out how to add an output port to my Reader, but I am
having difficulty.
I am trying to create the new output as outlined in the email below, but when I
get to the point of adding the column to the table, ParaView segfaults.
Having looked through other emails on the list, it looks like the output ports
need to be configured somehow, but I am not sure how to do that.
My reader creates a vtkStructuredGrid for the data, and I need to add the
vtkTable for the meta-data… how do I configure the reader for these two outputs?
Currently, my getInformation (beginning) looks like this:
------------
vtkInformation *outInfo = outputVector->GetInformationObject(0);
vtkStructuredGrid *output = vtkStructuredGrid::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
//TODO: Add Meta Data here first
// Use VTK Table output Port
// Following is from discussion on ParaView Mailing List
//-----------------------------------------------------------
// 315 vtkInformation *outInfo;
// 316 vtkTable *output;
// 317 vtkStringArray *data;
// 318
// 319 // output port 1 -> bw data
// 320 outInfo=outputVector->GetInformationObject(0);
// 321 output
// 322 =
dynamic_cast<vtkTable*>(outInfo->Get(vtkDataObject::DATA_OBJECT()));
// 323 data=vtkStringArray::New();
// 324 data->SetName("BW Data");
// 325 data->SetNumberOfComponents(1);
// 326 data->InsertNextValue(bwData.c_str());
// 327 output->AddColumn(data);
// 328 data->Delete();
//----------------------------------------------------------
vtkTable *MetaDataOutput;
vtkStringArray *MetaString;
//output port for table data
MetaDataOutput =
dynamic_cast<vtkTable*>(outInfo->Get(vtkDataObject::DATA_OBJECT()));
MetaString = vtkStringArray::New();
MetaString->SetName("Meta Data");
MetaString->InsertNextValue("This is a Test");
MetaString->InsertNextValue("This is Another Test");
//VVVVVVVVV This is making me crash! VVVVVVVVVVVV//
//----- Need another output port! How? -------//
MetaDataOutput->AddColumn(MetaString);
MetaString->Delete();
//structured grid below here....
vtkStructuredGrid *structOutput = vtkStructuredGrid::SafeDownCast(output);
--------------
The reader segfaults on MetaDataOutput->AddColumn(MetaString);
If someone could point me in the correct direction (or simply tell me how
stupid I am being!, and then point in the correct direction!) I would be very
grateful! I am sure I have a basic misunderstanding of what is supposed to be
happening here!
-Josh
From: burlen <burlen.lor...@gmail.com<mailto:burlen.lor...@gmail.com>>
Date: Thu, 22 Mar 2012 22:41:37 -0600
To: Joshua Murphy
<joshua.mur...@lasp.colorado.edu<mailto:joshua.mur...@lasp.colorado.edu>>
Cc: "paraview@paraview.org<mailto:paraview@paraview.org>"
<paraview@paraview.org<mailto:paraview@paraview.org>>
Subject: Re: [Paraview] Question on Information Objects
hi, information keys are more for passing info between filters through the
pipeline. if all you want is to display a string, you could make a second
output port to your reader that produces a vtkTable and populate it with the
string. This could be displayed in the pv ui. here's a quick example of what
you'd do in your request data:
315 vtkInformation *outInfo;
316 vtkTable *output;
317 vtkStringArray *data;
318
319 // output port 1 -> bw data
320 outInfo=outputVector->GetInformationObject(0);
321 output
322 = dynamic_cast<vtkTable*>(outInfo->Get(vtkDataObject::DATA_OBJECT()));
323 data=vtkStringArray::New();
324 data->SetName("BW Data");
325 data->SetNumberOfComponents(1);
326 data->InsertNextValue(bwData.c_str());
327 output->AddColumn(data);
328 data->Delete();
On 03/22/2012 03:38 PM, Joshua Murphy wrote:
Hello,
I am trying to get meta-data information from a file into ParaView. I have
successfully built the information key-value pairs in the information object in
my reader, but I am uncertain how to get the data out on the ParaView side of
things.
Example:
I want to get the Calendar date meta-data from my model file. I added Key to
the information object to the results info object.
I set keys as follows:
request->AppendUnique(vtkExecutive::KEYS_TO_COPY(),
vtkENLILMetaDataKeys::REFDATE_CAL());
I have a function to add the value to the key like such:
void vtkENLILMetaDataKeys::populate_meta_data(vtkInformation* request,
vtkInformationStringKey *key, char* value)
{
request->Set(key, value);
}
I then add the values to the keys as follows:
vtkENLILMetaDataKeys::populate_meta_data(outInfo,
vtkENLILMetaDataKeys::REFDATE_CAL(), temp);
After I do this, I can successfully pull the placed data from the information
object from within the reader.
What I cannot figure out is how to access this object from within Paraview.
My goal is to be able to include the calendar date (as text) in the render view.
Can someone guide me in the correct direction on how to do this? I am looking
for possibly a python way of getting at this data.
Thanks,
Josh
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