[Insight-users] calculate normal

[Leila Baghdadi]

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
> >> > 
> >> > 
> >> 
> > 
> > _______________________________________________
> > Insight-users mailing list
> > Insight-users at itk.org
> > http://www.itk.org/mailman/listinfo/insight-users
> > 
> > 
>