[vtkusers] how to show 4D?

[kingaza at gmail.com]

hi, emiliano, thank you very much!

could share your work? i think it will do me a favor!
thx again.

regards,
kingaza




On Wed, 15 Dec 2004 11:54:54 -0300, Emiliano Beronich
<emiliano at veccsa.com> wrote:
> Hi Kingaza,
> 
> yes, the application is running very well. I'm using the first approach.
> If you had an image of 64x64x64x8, then the vtkImageData would have an
> extent of 64x64x512. Suppose the order in the 3rd dimension is z-t. For
> getting a slice you just need to calculate
> 
> ZSlice = z + t * 8;
> 
> In this case you don't need any special class, just select the right
> ZSlice in the vtkImageMapper. However if you want to display another
> pair of axes (X-Z or Y-Z) you need special classes. Using only vtk
> requires your own transformations classes (that work with
> vtkImageReslice), using itk requires stacking the 3rd and 4th dimension
> along a the 3rd. I prefer the last one.
> Do you need to show a different pair of axes? If you need it I could
> send the classes I have developed to you.
> 
> Regards,
> Emiliano
> 
> kingaza at gmail.com wrote:
> > thx for your help
> > it seems a good appoach.
> > have you secceeded in it?
> >
> > regards,
> > kingaza
> >
> > On Tue, 14 Dec 2004 12:26:38 -0300, Emiliano Beronich
> > <emiliano at veccsa.com> wrote:
> >
> >>Hi kingaza,
> >>
> >>Do you want to show 4D-images?
> >>
> >>vtk supports only 3D images. If you want to show the 4th dimension you
> >>need to implement some trick.
> >>You could try one of these solutions:
> >>-stacking the 3rd and 4th dimension in the same dimension (the 3rd).
> >>-depending of what you need exactly, another solution could be reading
> >>the image under itk, extracting a 3D-volume and then exporting to vtk.
> >>With this approach you lose some pipeline funcionality.
> >>
> >>I have an application where I am showing 4D images. I read and process
> >>the image on itk and I use vtk for visualization. I have developed some
> >>classes to stack the 4th dimension in the 3rd before exporting to vtk,
> >>preserving the pipeline update when a different t is needed.
> >>
> >>HTH
> >>Emiliano
> >>
> >>
> >>kingaza at gmail.com wrote:
> >>
> >>>hi all,
> >>>i am learning vtk, and now i want to show 4D (3D + t),  how can i implement it?
> >>>could you give me some example?
> >>>
> >>>regards,
> >>>kingaza
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