[Insight-users] calculate normal
Leila Baghdadi
baghdadi at phenogenomics.ca
Wed Feb 20 12:47:15 EST 2008
check InsightApplication/DeformableModel...
I think that code needs work but I am sure I have the part where it
converts the mesh to pass to vtk.
HTH
Leila
On Wed, 2008-20-02 at 09:21 -0800, rashedk wrote:
>
> Thanks, but now I am stuck trying to display a simplex mesh in VTK. How do I
> visualize this mesh? Is there also a way to iterate through every point on
> the mesh?
>
> Rashed.
>
>
> Leila Baghdadi-2 wrote:
> >
> > Yep that's right and another note,
> >
> > you "must" create a triangle mesh in order to create a simplex mesh!
> >
> > If you are unsure about how it is done, check the paper
> > simplex mesh
> > by herve delingette of INRIA france
> >
> > good luck
> >
> > Leila
> >
> > On Wed, 2008-20-02 at 12:47 +0100, Iván Macía wrote:
> >> Hi Rashed,
> >>
> >> You can do what you mention with VTK or directly in ITK use
> >> itk::BinaryMask3DMeshSource, which is the equivalent of Marching Cubes in
> >> ITK. As the name implies, you need a binary mask (segmentation) as input.
> >>
> >> HTH
> >>
> >> Ivan
> >>
> >> -----Mensaje original-----
> >> De: insight-users-bounces+imacia=vicomtech.org at itk.org
> >> [mailto:insight-users-bounces+imacia=vicomtech.org at itk.org] En nombre de
> >> rashedk
> >> Enviado el: miércoles, 20 de febrero de 2008 12:06
> >> Para: insight-users at itk.org
> >> Asunto: Re: [Insight-users] calculate normal
> >>
> >>
> >> Hi,
> >>
> >> How do I convert my 3D image data to a simplex mesh in order to compute
> >> the
> >> normals? Checking the class documentation for itk::SimplexMesh reveals
> >> that
> >> one has to generate a triangle mesh and then use the
> >> itkTriangleMeshToSimplexMeshFilter. But then how do I convert my 3D image
> >> data to a triangle mesh?? Do I use vtkContour to produce polyData and
> >> then
> >> convert it to itkMesh using appropriate filters?
> >>
> >> Any help will be appreciated,
> >>
> >> Thanks
> >> Rashed
> >>
> >>
> >>
> >> Luis Ibanez wrote:
> >> >
> >> > Hi Tony,
> >> >
> >> >
> >> > Well.... if you only have a point, then there is no normal to compute.
> >> >
> >> > You probably are thinking of a point from a surface, where a point
> >> > belongs to several faces and have other points as neighbors.
> >> >
> >> >
> >> > In that case you may want to look at the itk::SimplexMesh
> >> > http://www.itk.org/Insight/Doxygen/html/classitk_1_1SimplexMesh.html
> >> >
> >> > and its "ComputeNormal" method:
> >> >
> >> http://www.itk.org/Insight/Doxygen/html/classitk_1_1SimplexMesh.html#itk_1_1
> >> SimplexMesha5
> >> >
> >> >
> >> > Regards,
> >> >
> >> >
> >> > Luis
> >> >
> >> >
> >> > -------------------
> >> > tony hakki wrote:
> >> >> Is it possible to calculate normal of a point in ITK? If yes, Could
> >> you
> >> >> tell which class should be used?
> >> >> thank you
> >> >>
> >> >>
> >> > _______________________________________________
> >> > Insight-users mailing list
> >> > Insight-users at itk.org
> >> > http://www.itk.org/mailman/listinfo/insight-users
> >> >
> >> >
> >>
> >
> > _______________________________________________
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> > Insight-users at itk.org
> > http://www.itk.org/mailman/listinfo/insight-users
> >
> >
>
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