[vtkusers] What is the order of calling delete methods on a pipeline?

[chasank]

Hi Peter, 

I have designed a class containing many vtk objects, that's why I do not
want
to release memory resources by scope. The other vtk objects have to live.
I want to release only volume rendering pipeline on runtime. How can I do it
safely?
Thanks!


Peter F Bradshaw wrote:
> 
> Hi Chasan;
> 
> If you wish to release the pipeline below why not encase it in its own
> scope? If you are using vtkSmartPointer, which you are, then the
> pipeline will be destroyed when it goes out of scope.
> 
> On Sat, 7 May 2011, Chasan KIOUTSOUKMOUSTAFA wrote:
> 
>> I have a volume rendering pipeline and I want to release all the memory
>> resources of pipeline on runtime .
>> How can I release memory resources of the pipeline safely?
>> It seems the iren is the end of pipeline, if I call the iren->Delete(),
>> will
>> it delete recursively all of the pipeline?
>> What is the solution ? Pipeline is below. Thanks for answers!!
>>
>>     renderer = vtkSmartPointer < vtkRenderer > :: New();
>>     renderWindow = vtkSmartPointer < vtkWin32OpenGLRenderWindow > ::
>> New();
>>     renderWindow->AddRenderer(renderer);
>>     renderWindow->SetSize(width, height);
>>
>>     iren = vtkSmartPointer < vtkWin32RenderWindowInteractor > :: New();
>>     iren->SetRenderWindow(renderWindow);
>>
>>     volumeMapper =
>> vtkSmartPointer<vtkFixedPointVolumeRayCastMapper>::New();
>>     volumeMapper->SetInputConnection(reader->GetOutputPort());
>>     volumeMapper->SetBlendModeToComposite();
>>
>>     volumeColor = vtkSmartPointer<vtkColorTransferFunction>::New();
>>     volumeColor->AddRGBPoint(0,    0.0, 0.0, 0.0);
>>     volumeColor->AddRGBPoint(500,  1.0, 0.5, 0.3);
>>     volumeColor->AddRGBPoint(1000, 1.0, 0.5, 0.3);
>>     volumeColor->AddRGBPoint(1150, 1.0, 1.0, 0.9);
>>
>>     volumeScalarOpacity =  vtkSmartPointer<vtkPiecewiseFunction>::New();
>>     volumeScalarOpacity->AddPoint(0,    0.00);
>>     volumeScalarOpacity->AddPoint(500,  0.15);
>>     volumeScalarOpacity->AddPoint(1000, 0.15);
>>     volumeScalarOpacity->AddPoint(1150, 0.90);
>>
>>     volumeGradientOpacity = vtkSmartPointer<vtkPiecewiseFunction>::New();
>>     volumeGradientOpacity->AddPoint(0,   0.0);
>>     volumeGradientOpacity->AddPoint(90,  0.5);
>>     volumeGradientOpacity->AddPoint(100, 1.0);
>>
>>     volumeProperty = vtkSmartPointer<vtkVolumeProperty>::New();
>>     volumeProperty->SetColor(volumeColor);
>>     volumeProperty->SetScalarOpacity(volumeScalarOpacity);
>>     volumeProperty->SetGradientOpacity(volumeGradientOpacity);
>>     volumeProperty->SetInterpolationTypeToLinear();
>>     volumeProperty->ShadeOff();
>>     volumeProperty->SetAmbient(0.4);
>>     volumeProperty->SetDiffuse(0.6);
>>     volumeProperty->SetSpecular(0.2);
>>
>>     LODProperty = vtkSmartPointer <vtkLODProp3D>::New();
>>     int id = LODProperty->AddLOD(volumeMapper, volumeProperty, 0.0);
>>     LODProperty->SetLODLevel(id, 0.0);
>>
>>     renderer->AddViewProp(LODProperty);
>>     renderer->ResetCamera();
>>     renderer->Render();
>>
>>     iren->Initialize();
>>
> 
> Cheers
> 
> -- 
> Peter F Bradshaw: http://www.exadios.com (public keys avaliable there).
> Personal site: http://personal.exadios.com
> "I love truth, and the way the government still uses it occasionally to
>  keep us guessing." - Sam Kekovich.
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