[vtkusers] Fwd: Problem with vtksmoothPolyDataFilter

Wed Apr 25 14:39:34 EDT 2012

vtkSmoothPolyData only smooths triangle and polygon cells I believe.

This example:
http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/FitSplineToCutterOutputfits
a spline to polylnes produced by vtkCutter. A similar approach might
work in your cases.

Bill

On Wed, Apr 25, 2012 at 1:39 PM, Darshan Pai <darshanpai at gmail.com> wrote:

> yes I don't really have an answer for that yet . Let me know if you figure
> it out .
>
> Regards
> Darshan
>
>
> On Wed, Apr 25, 2012 at 3:43 AM, Vincent LEFORT <
> vincent.lefort at aquilab.com> wrote:
>
>>  Hi, I have the same problem,****
>>
>> ** **
>>
>> I want to smooth isolines extracted from vtkMarchingContourFilter (with
>> the help of vtkImageReslice before) but vtkSmoothPolyDataFilter don’t work…
>> (or I missuse it).****
>>
>> ** **
>>
>> The goal is to avoid this display effect : ****
>>
>> ****
>>
>> ** **
>>
>> Anyone has an idea of how to use a smooth filter on an isoline ?****
>>
>> ** **
>>
>> Regards,****
>>
>> ** **
>>
>> *Vincent LEFORT***
>>
>> ** **
>>
>> *De :* vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] *De la
>> part de* Darshan Pai
>> *Envoyé :* mardi 10 avril 2012 21:18
>> *À :* pj gouttenoire
>> *Cc :* vtkusers at vtk.org
>> *Objet :* Re: [vtkusers] Fwd: Problem with vtksmoothPolyDataFilter****
>>
>> ** **
>>
>> Even with your setup it does not work . ****
>>
>> On Tue, Apr 10, 2012 at 4:27 AM, pj gouttenoire <goutteno at esrf.fr> wrote:
>> ****
>>
>> i used vtkSmoothPolyDataFilter like this and it works.
>>
>>     // Lissage de la surface
>>    vtkSmartPointer< vtkSmoothPolyDataFilter> smoothFilter =
>> vtkSmartPointer<vtkSmoothPolyDataFilter>::New();
>>     smoothFilter->SetInput(isor->GetOutput());
>>     smoothFilter->SetNumberOfIterations(nbIteration);
>>     smoothFilter->SetRelaxationFactor(relFactor);
>>     smoothFilter->SetConvergence(convergence);
>>     smoothFilter->BoundarySmoothingOff ();
>>     smoothFilter->Update();
>>
>>
>> Le 06/04/2012 23:34, Darshan Pai a écrit : ****
>>
>> I still could not find debug this problem , pushing it up once again . **
>> **
>>
>> ---------- Forwarded message ----------
>> From: *Darshan Pai* <darshanpai at gmail.com>
>> Date: Fri, Mar 2, 2012 at 2:03 AM
>> Subject: Problem with vtksmoothPolyDataFilter
>> To: vtkusers at vtk.org
>>
>>
>> Hello All,
>>
>> I have been moving some of my old projects which are on VTK4.4 onto the
>> new VTK nightly build .
>> Following is the code I am using
>>
>> vtkSmartPointer< ****
>>
>> vtkImageThreshold> renderThreshold =
>> vtkSmartPointer<vtkImageThreshold>::New();
>>         renderThreshold->ThresholdBetween(0, 0);
>>         renderThreshold->SetInValue(0);
>>         renderThreshold->SetOutValue(1);
>>         renderThreshold->SetInput(ribbonsurface);
>>
>>         vtkSmartPointer<vtkImageIslandRemoval2D> renderIslandRemoval2D1 =
>> vtkSmartPointer<vtkImageIslandRemoval2D>::New();
>>
>> renderIslandRemoval2D1->SetInputConnection(renderThreshold->GetOutputPort());
>>         renderIslandRemoval2D1->SetAreaThreshold(100);
>>         renderIslandRemoval2D1->SetIslandValue(1);
>>         renderIslandRemoval2D1->SetReplaceValue(0);
>>
>>         vtkSmartPointer<vtkImageIslandRemoval2D> renderIslandRemoval2D2 =
>> vtkSmartPointer<vtkImageIslandRemoval2D>::New();
>>
>> renderIslandRemoval2D2->SetInputConnection(renderIslandRemoval2D1->GetOutputPort());
>>         renderIslandRemoval2D2->SetAreaThreshold(100);
>>         renderIslandRemoval2D2->SetIslandValue(0);
>>         renderIslandRemoval2D2->SetReplaceValue(1);
>>
>>         vtkSmartPointer<vtkImageContinuousErode3D>
>> renderContinuousErode3D = vtkSmartPointer<vtkImageContinuousErode3D>::New();
>>
>> renderContinuousErode3D->SetInputConnection(renderIslandRemoval2D2->GetOutputPort());
>>         renderContinuousErode3D->SetKernelSize(3, 3, 3);
>>
>>         vtkSmartPointer<vtkImageContinuousDilate3D>
>> renderContinuousDilate3D =
>> vtkSmartPointer<vtkImageContinuousDilate3D>::New();
>>
>> renderContinuousDilate3D->SetInputConnection(renderContinuousErode3D->GetOutputPort());
>>         renderContinuousDilate3D->SetKernelSize(4, 4, 4);
>>
>>         vtkSmartPointer<vtkContourFilter> renderContourFilter =
>> vtkSmartPointer<vtkContourFilter>::New();
>>
>> renderContourFilter->SetInputConnection(renderContinuousDilate3D->GetOutputPort());
>>         renderContourFilter->SetValue(0,1);
>>
>>         vtkSmartPointer<vtkSmoothPolyDataFilter>
>> renderSmoothPolyDataFilter =
>> vtkSmartPointer<vtkSmoothPolyDataFilter>::New();
>>
>> renderSmoothPolyDataFilter->SetInputConnection(renderContourFilter->GetOutputPort());
>>         renderSmoothPolyDataFilter->SetNumberOfIterations(20);
>>         renderSmoothPolyDataFilter->SetRelaxationFactor(0.15);
>>         renderSmoothPolyDataFilter->SetFeatureAngle(40);
>>         renderSmoothPolyDataFilter->FeatureEdgeSmoothingOff();
>>         renderSmoothPolyDataFilter->BoundarySmoothingOff();
>>         renderSmoothPolyDataFilter->SetConvergence(0);
>>         renderSmoothPolyDataFilter->Update();
>>
>>         vtkSmartPointer<vtkPolyDataMapper> ribbonpolydata =
>> vtkSmartPointer<vtkPolyDataMapper>::New();
>>
>> ribbonpolydata->SetInputConnection(renderSmoothPolyDataFilter->GetOutputPort());
>>
>>         ribbonactor = vtkSmartPointer<vtkActor>::New();
>>         ribbonactor->SetMapper(ribbonpolydata);
>>
>> I have attached the output . It looks as if everything up until the
>> rendercontourFilter generates the exact same output in VTK 4.4 and the
>> current VTK
>>
>> But when I introduce the vtkSmoothPolyDataFilter , the output does not
>> change . There is no smoothing on the polydata .
>>
>> I cannot seem to pinpoint the problem . Hope someone can help
>>
>> Regards
>> Darshan
>>
>> ****
>>
>>
>>
>> ****
>>
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>>
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>
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