[vtkusers] Memory management : pointer on VTK object

[Malsoaz James]

Thank you.

SetSource(NULL) solves the issue.

Best.


________________________________
 De : Alex Malyushytskyy <alexmalvtk at gmail.com>
À : Malsoaz James <jmalsoaz at yahoo.fr> 
Cc : "vtkusers at vtk.org" <vtkusers at vtk.org> 
Envoyé le : Samedi 6 juillet 2013 0h01
Objet : Re: [vtkusers] Memory management : pointer on VTK object
 


Try to add
SetSource(NULL);

calls after you register polydata


polydata->Register(NULL);
polydata->SetSource(NULL);
.....
output->Register(NULL);
output->SetSource(NULL);


Another source of extra memory usage may be memory granularity,

If you say that DeepCopy helps it means deleting/allocationg memory at the same and bugger chunks helps to avoid granularity.

In this case nothing you can do.


In any case I would suggest to get 

vtkTransformPolyDataFilter * trFilter = vtkTransformPolyDataFilter::New();


and
   trFilter->Delete();
out of loop.



Regards,

    Alex





On Thu, Jul 4, 2013 at 12:33 AM, Malsoaz James <jmalsoaz at yahoo.fr> wrote:

Hi,
>
>
>I'm experiencing troubles when copying pointers of VTK object.
>
>
>Let's say I want to apply transformation to a polydata recursively like this:
>
>
>    //Read STL
>    vtkSTLReader * reader = vtkSTLReader::New();
>    reader->SetFileName("1.stl");
>    reader->Update();
>
>
>    vtkPolyData * polydata = reader->GetOutput();
>    polydata->Register(NULL);
>    reader->Delete();
>
>
>    vtkTransform * tr = vtkTransform::New();
>    tr->Translate(5, 10, 1);
>    tr->Update();
>
>
>    for(int i = 0 ; i < 1000 ; ++i)
>    {
>    std::cout << i << std::endl;
>    vtkTransformPolyDataFilter * trFilter = vtkTransformPolyDataFilter::New();
>trFilter->SetInput(polydata);
>trFilter->SetTransform(tr);
>trFilter->Update();
>
>
>vtkPolyData * output = trFilter->GetOutput();
>output->Register(NULL);
>trFilter->Delete();
>
>
>polydata->Delete();
>polydata = output;
>    }
>    tr->Delete();
>
>    polydata->Delete();
>
>
>This is working fine and I have no VTK leaks. Unfortunately, I'm noticing that memory for my program increases instead of remaining constant.
>What's wrong with theses few lines?
>
>
>By the way, using DeepCopy to save output data is working:
>polydata = vtkPolyData::New();
>polydata->DeepCopy(output);
>output->Delete();
>But I would like to avoid to deep copy data when I only need to add a reference to the pointer. I also would like to avoid the use of vtkSmartPointer.
>
>
>Thank you for your help
>Best.
>
>
>_______________________________________________
>Powered by www.kitware.com
>
>Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
>Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>
>Follow this link to subscribe/unsubscribe:
>http://www.vtk.org/mailman/listinfo/vtkusers
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20130711/0d888bab/attachment.htm>