[vtk-developers] My own filter has problem connecting with vtkXMLRectilinearGridWriter

[David E DeMarle]

I would step through vtkXMLRectilinearGridWriter in a debugger and find out
where and why it is returning early. vtkRectilinearGridWriter is OK with
what your filter provides, but vtkXMLRectilinearGridWriter is not for some
unknown reason. My guess is that your filter is not providing some extent
information, but that is just a guess.



David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909


On Wed, Mar 12, 2014 at 11:59 PM, Mingcheng Chen <linyufly at gmail.com> wrote:

> Hi David,
>
> After trying vtk-6.1. The problem still exists.
>
> My filter inherits from vtkRectilinearGridAlgorithm since its output is
> vtkRectilinearGridAlgorithm. And I only override the following two methods.
>
>  virtual int FillInputPortInformation(int, vtkInformation *);
> virtual int RequestData(vtkInformation *request, vtkInformationVector
> **inputVector, vtkInformationVector *outputVector);
>
> And I am sure that RequestData is called, and the GetOutput() of my filter
> object is not empty (at least should have 8000000 cells as my code outputs).
>
> Is there any method I should override?
>
> Thanks!
>
> Best regards,
> Mingcheng Chen
> March 12th, 2014
>
>
> On Wed, Mar 12, 2014 at 8:26 AM, David E DeMarle <dave.demarle at kitware.com
> > wrote:
>
>> Can you try 5.10 or 6.1? 5.0 is quite old and it was just after some
>> major pipeline work which _potentially_ could have caused things like this
>> tp happen.
>>
>> David E DeMarle
>> Kitware, Inc.
>> R&D Engineer
>> 21 Corporate Drive
>> Clifton Park, NY 12065-8662
>> Phone: 518-881-4909
>>
>>
>> On Tue, Mar 11, 2014 at 10:37 PM, Mingcheng Chen <linyufly at gmail.com>wrote:
>>
>>> Hi everyone,
>>>
>>> I wrote a filter lcsFlowMap, whose output is a vtkRectilinearGrid
>>> object. I use VTK-5.0.
>>>
>>> When I connect the filter object's output to a vtkRectilinearGridWriter
>>> object, it works, producing expected output. However, when I connect my
>>> filter to a vtkXMLRectilinearGridWriter object, the output seems an empty
>>> grid.
>>>
>>> I am sure that my RequestData() is called and I produced a non-empty
>>> grid, and when I use CopyStructure and CopyAttribute to get a copy of my
>>> filter's GetOutput() and use vtkXMLRectilinearGridWriter to write it to a
>>> file. It can produce correct result.
>>>
>>> Could anybody please shed some light on that?
>>>
>>> Thanks!
>>>
>>> Best regards,
>>> Mingcheng Chen
>>> March 11th, 2014
>>>
>>> --
>>> Research Assistant in Graphics Group
>>> University of Illinois at Urbana-Champaign
>>> http://mingchengchen.org
>>>
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>>>
>>>
>>
>
>
> --
> Research Assistant in Graphics Group
> University of Illinois at Urbana-Champaign
> http://mingchengchen.org
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Follow this link to subscribe/unsubscribe:
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>
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