[vtkusers] Zoom Question

[Paulo Henrique Junqueira Amorim]

Hi,

How can I change the slice in vtkImageActor ?

I am trying to use the image_actor.SetZSlice (10), but does not change the
piece, it seems that the manual says it is not on the slices that are in HD.


Regards,
Paulo Amorim



2008/11/11 David Gobbi <david.gobbi at gmail.com>

> Hi Paulo,
>
> It is impossible to zoom a 2D actor.  Instead, you have to magnify the
> image before it goes to the vtkImageMapper.  To zoom by an integer
> factor, you can use something like vtkImageMagnify to enlarge the
> image and then vtkImageClip to crop the image to the desired size.
>
> You might find it easier to use vtkImageActor, though, since
> vtkImageActor is a 3D actor and you can just zoom the camera.
>
>    David
>
>
> On Tue, Nov 11, 2008 at 1:28 PM, Paulo Henrique Junqueira Amorim
> <paulojamorim at gmail.com> wrote:
> > Hi,
> >
> > How do I zoom into a vtkActor2D with vtkImageMapper?
> >
> > The vtkCamera only works with 3D.
> >
> >
> > Regards,
> > Paulo Amorim
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