[vtkusers] vtkMarchingCubes

[Mathieu Malaterre]

Marwan
	I don't know what are you looking for. Anyway with vtkWindowSync... you 
forgot to specify the number of iterations.
Try something like:

vtkWindowedSincPolyDataFilter smooth
     smooth SetInput [mcubes GetOutput]
     smooth SetNumberOfIterations 50
     smooth BoundarySmoothingOn
     smooth SetFeatureAngle 120
     smooth SetEdgeAngle 90
     smooth SetPassBand 0.1

vtkPolyDataNormals normals
     normals SetInput [smooth GetOutput]

vtkStripper stripper
     stripper SetInput [normals GetOutput]

vtkPolyDataMapper cylMapper
     cylMapper SetInput [stripper GetOutput]


---
	Also please note that these filters won't modify the number of edges so 
if your mesh is poorly define. Make use of any interpolation filters 
(butterfly etc...)


yaHTH

mathieu

Marwan Adada wrote:
> Hello,
> I tried using these filters but for some reason I am not getting any 
> change in the output, my code is:
> 
> vtkSmoothPolyDataFilter *Smooth = vtkSmoothPolyDataFilter::New();
>         Smooth->SetInput(mcubes->GetOutput());
>         Smooth->SetNumberOfIterations(10);
>         Smooth->SetRelaxationFactor(1);
>         Smooth->SetFeatureAngle(0);
>         Smooth->FeatureEdgeSmoothingOn();
>         Smooth->BoundarySmoothingOn();
>         Smooth->SetConvergence(0);
>         Smooth->ReleaseDataFlagOn();
> 
> Then I tried :
> vtkWindowedSincPolyDataFilter *Smooth=vtkWindowedSincPolyDataFilter::New();
>         Smooth->SetInput(mcubes->GetOutput());
>         Smooth->GenerateErrorVectorsOn();
>         Smooth->GenerateErrorScalarsOn();
>         Smooth->Update();
> 
> And still no change, Any Ideas why this is happening??
> Thanks in Advance...
> Marc,
> 
> P.S Thanks Mathieu
> 
> 
>> From: Mathieu Malaterre <Mathieu.Malaterre at creatis.insa-lyon.fr>
>> To: Marwan Adada <adada_marwan at hotmail.com>
>> CC: vtkusers at public.kitware.com
>> Subject: Re: [vtkusers] vtkMarchingCubes
>> Date: Wed, 23 Apr 2003 20:08:20 +0200
>>
>> http://www.vtk.org/doc/nightly/html/classvtkSmoothPolyDataFilter.html
>>
>> and
>> http://www.vtk.org/doc/nightly/html/classvtkWindowedSincPolyDataFilter.html 
>>
>> the later is not lagrangian -> no shrinkage !
>>
>> HTH
>> mathieu
>>
>> Marwan Adada wrote:
>>
>>> Hello,
>>> Now I converted my 8bit buffer to a 16bit buffer and sliced it, then 
>>> passed it to vtkVolume16Reader and then to marching cubes, and I got 
>>> the volume.  But my result is not smooth at all, I set the 
>>> MarchingCube->ComputeNormalsOn(); and still the result is not smooth.
>>> Is there any filter I can use to smooth the resulting output from 
>>> marching cubes??
>>> Thanks in advance
>>>
>>> Marc
>>>
>>> P.S Thanks james;
>>>
>>>> From: James Dessart <james at rogue-research.com>
>>>> To: Marwan Adada <adada_marwan at hotmail.com>
>>>> CC: vtkusers at public.kitware.com
>>>> Subject: Re: [vtkusers] vtkMarchingCubes
>>>> Date: Wed, 23 Apr 2003 13:58:55 -0400 (EDT)
>>>>
>>>>
>>>>
>>>> On Wed, 23 Apr 2003, Marwan Adada wrote:
>>>>
>>>> > I have an 8 bit volume data (205x233x251) that I need to pass to
>>>> > vtkMarchingCubes.  I tried using vtkImageReader but it seems not 
>>>> to work
>>>> > with vtkMarchingCubes.  I tried vtkImageData and still couldn't 
>>>> pass it to
>>>> > vtkMarchingCubes.  I know vtkVolume16Reader works with 
>>>> vtkMarchingCubes, but
>>>> > my data 8bits not 16bits.  I am wondering what vtk 8bit Readers does
>>>> > vtkMarchingCubes accepts, Any Ideas??
>>>>
>>>> What you could try would be to read it in as 16-bit values, and run
>>>> marching cubes on that.  The values would be between 0-255, as 8-bit
>>>> values generally are, but that shouldn't matter, if you specify your
>>>> threshold for marching cubes properly.
>>>>
>>>> hope that helps,
>>>> James
>>>>
>>>
>>>
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>>
>>
>> -- 
>> Mathieu Malaterre
>> CREATIS
>> 28 Avenue du Doyen LEPINE
>> B.P. Lyon-Montchat
>> 69394 Lyon Cedex 03
>> http://www.creatis.insa-lyon.fr/~malaterre/
>>
> 
> 
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-- 
Mathieu Malaterre
CREATIS
28 Avenue du Doyen LEPINE
B.P. Lyon-Montchat
69394 Lyon Cedex 03
http://www.creatis.insa-lyon.fr/~malaterre/