[vtkusers] Problem with use of vtkImageChangeInformation::SetOutputSpacing()

[Daniela Sacchetto]

Thanks Jerome for your advise but I not able to use this class.
I think that I have to use

vtkImageChangeInformation::SetOutputSpacing(float, float, float)

but I don't understand how to set float parametres to have the effect desired: I want only change the slice distance, so I think that I have to set the value desired as third parameter between brackets, but I don't know how set the other....

Have anyone an example for me?

Regards
Daniela

> Date: Tue, 1 Jun 2010 10:16:03 +0200
> Subject: Re: [vtkusers] Filter to set the slice distance in a 3D rendered 	volume
> From: jerome.velut at gmail.com
> To: danysunflower at hotmail.it
> CC: daviddoria+vtk at gmail.com; vtkusers at vtk.org
> 
> Hi Daniela,
> 
> I think you can use the vtkImageAppend filter together with the
> vtkImageChangeInformation.
> 
> HTH
> Jerome
> 
> 
> 2010/6/1 Daniela Sacchetto <danysunflower at hotmail.it>:
> > Ok, sorry,  I'll try to explain in an other way...
> > I have a 3D rendered volume that is ok but its Z dimension is too
> > little....I would like to set the Z dimenmsion (for example setting the
> > pixels or slices distance)...
> > I know that there is a Itk method (ImageType::SpacingType) that allows to
> > set the pixels distance....Is there a VTK method that allows to render my
> > image with a note distance in Z direction?
> >
> > I hope that now you could understand better my problem...
> > Regards
> > Daniela
> >
> >> Date: Mon, 31 May 2010 17:22:38 -0400
> >> Subject: Re: [vtkusers] Filter to set the slice distance in a 3D rendered
> >> volume
> >> From: daviddoria+vtk at gmail.com
> >> To: danysunflower at hotmail.it
> >> CC: vtkusers at vtk.org
> >>
> >> On Mon, May 31, 2010 at 5:08 PM, Daniela Sacchetto
> >> <danysunflower at hotmail.it> wrote:
> >> > Hi everyone
> >> > I'm new in vtk and I'm trying to do a work for my thesis.
> >> >
> >> > I have to improve a code that gives a 3D volume from 2D slices (.jpg or
> >> > other formats).
> >> > My code has to be improved because the 3D visualized with VTK (I'm using
> >> > vtkVolumeRayCastCompositeFunction) is too "slim": I would like to
> >> > modifie
> >> > the Z dimension.
> >> > Have anyone found this problem yet? Could anyone suggest me a VTK method
> >> > or
> >> > class that do something similar?
> >> >
> >> > Regards
> >> > Daniela
> >>
> >> I don't know what you mean by "slim". Can you give us a sample data
> >> set or a screenshot of what you have and an explanation of what is
> >> wrong?
> >>
> >> You may want to look into the Marching Cubes algorithm:
> >>
> >> http://www.vtk.org/Wiki/VTK/Examples/Medical/GenerateModelsFromLabels
> >>
> >> Good luck,
> >>
> >> David
> >
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