[Paraview] Filter to keep points, dropping topology

[Burlen Loring]

don't forget to add vertex type cells, or you will not be able to see 
the points,  and that it's going to be more complicated if you're 
starting from data types that have implicit points.


On 10/22/2014 07:52 AM, Biddiscombe, John A. wrote:
> Output->SetPoints(input->GetPoints());
>
> Or
>
> Output->CopyStructure(input);
> Output->SetCells(NULL)
>
> Then copy point field data etc
>
>
> On 22/10/14 16:19, "B.W.H. van Beest" <bwvb at xs4all.nl> wrote:
>
>> Hello,
>>
>> I need a filter that only keeps the 3D points of a certain source (e.g.
>> coming from  an stl file).
>> The topology of the data set may go.
>>
>> I thought that the following filter, only passing through the pointdata,
>> would do the job,
>> but that appears not to be the case (no points after the filter!)
>> What's going wrong and how should I change the filter?
>>
>> Kind Regards,
>> Bertwim
>>
>> ================
>>
>> int FilterPoints::RequestData( vtkInformation*,
>>                                              vtkInformationVector**
>> inputVector,
>>                                              vtkInformationVector*
>> outputVector)
>> {
>>    // Get the input and output data objects.
>>    vtkDataSet* input = vtkDataSet::GetData( inputVector[0] );
>>    vtkDataSet* output = vtkDataSet::GetData( outputVector );
>>
>>    // output->CopyStructure( input );
>>    output->GetPointData()->PassData( input->GetPointData() );
>>   
>>    return 1;
>> }
>>
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