[vtkusers] Fill closed surface with voxels.

[Hendrik Belitz]

Hi Vladimir,

maybe the following code fragment will suffice:
	
	// Stencil is created from PolyData and empty ImageData
	vtkImageData* vi = vtkImageData::New();
        vi->SetOrigin( 0,0,0 ); // adjust these to your needs
        vi->SetSpacing( 1,1,1 ); // adjust these to your needs
        vi->SetDimensions( 181,217,181 ); // adjust these to your needs
        vi->SetScalarTypeToUnsignedChar ();
        vi->AllocateScalars(); 
	// outputMesh is of vtkPolyData* type and contains your mesh data
	vtkPolyDataToImageStencil* pti = vtkPolyDataToImageStencil::New();
        pti->SetInput( outputMesh );
        pti->Update();
        vtkImageStencil* is = vtkImageStencil::New();
        is->SetInput( vi );
        is->SetStencil( pti->GetOutput() );
        is->ReverseStencilOff();
        is->SetBackgroundValue(1);
        is->Update();
	// is->GetOutput() returns your image data as vtkImageData*

Regards
 Hendrik

-------------------------------------------------------------------
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stupidity can usually be traced to an organization. - Jon Bentley

Hendrik Belitz, Computer Scientist
email: hbelitz at computer.org or hbelitz at ieee.org


On Saturday 25 August 2007 07:24:51 Vladimir Lazunin wrote:
> Thank you, Hendrik. From the description of vtkPolyDataToImageStencil it
> looks like what I need. Hope I won't be too annoying by asking if you
> have any code example?
> Now I'm trying to figure it out from the only example I found in VTK
> "Examples" folder, but it does something too different.
>
> Vladimir.
>
> Hendrik Belitz wrote:
> > Hi Vladimir,
> >
> > since I guess that this is essentially the same problem Achim Poll
> > required a solution for a day before, I'll give you the same answer:
> >
> > With high probability, this answer is still valid:
> > http://public.kitware.com/pipermail/vtkusers/2002-April/060535.html
> >
> > I use vtkPolyDataToImageStencil for myself with good results to
> > "voxelize" polydata meshes. Even more decent results could be obtained
> > by using an external library, like object voxelization by filterung
> > for example( http://www.viskom.oeaw.ac.at/~milos/
> > <http://www.viskom.oeaw.ac.at/%7Emilos/> ), with the only drawback
> > that you need to convert your data by yourself into the appropiate
> > formats.
>
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