[Paraview] Filter to keep points, dropping topology

[B.W.H. van Beest]

Are you saying that one cannot have just points?

In my case, I want to  snap the points to a structured grid,
but haven't done that yet, as I wanted to see the
points first, and do the snapping as a next step.
So that is not a good idea? I need to do it all in one go?

Regards,
Bertwim





On 10/22/2014 04:58 PM, Burlen Loring wrote:
> 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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>
>
>