[vtkusers] Re: vtkImageActor and vtkImageReslice

[Pankaj Daga]

Hello again,

Sorry to clutter the list but I keep discovering new things:

It seems that it is because of the way I have set up my reslicer. Let me
first list what is happening.

I can get it to show me the slice in axial plane if I just call
SetOutputDimensionality() and not do the output origin, output extent and
output spacing myself. Then all I have to do is set the camera parameters
correctly and the slice shows. I have had no luck with viewing the sagittal
and coronal planes. It seems  that I might have to permute the reslice axes
matrix of my reslicer before I set it as the transform matrix of the
vtkImageActor. Can someone please confirm if this is correct?

Now, I have the reslicer set up really the way I want it. Is there some way
that I can position the vtkImageActor to the position that the reslicer is
set at. I thought just setting the SetUserMatrix() should have done the
trick, but it seems that if you set up the output params yourself on the
reslicer, you are in a bit of soup.

I do hope someone can help me here.

Best regards,

Pankaj





On 10/12/06, Pankaj Daga <deluded.soul at gmail.com> wrote:
>
> Hi again,
>
> By the way, I already have called the SetUserMatrix on the image actor to
> match that of my reslicer but it really does not show the whole image...
>
> So, when I set the slice then I do the following:
>
> case AXIAL:
>         sliceMan->SetResliceAxesOrigin(0, 0, origin[2] + num *
> spacing[2]);
>          imageAct->SetUserMatrix(sliceMan->GetResliceAxes());
>          break;
>
> Bizarre though...only see a small part of the image. I guess there is something else missing here... Any pointers, experts?
>
> Best regards,
> Pankaj
>
>
> On 10/12/06, Pankaj Daga <deluded.soul at gmail.com> wrote:
> >
> > Hiya,
> >
> > I have a vtkImageReslice that is giving me 2D slices. The slices are
> > shown correctly using a simple 2D actor but when I try to visualize it using
> > vtkImageActor I only see like a small part of the image (a bit of the lower
> > left corner).
> >
> > Just for test I viewed it using a vtkActor2D and everything seems ok and
> > it shows correctly at the correct position on the screen and with the
> > correct spacing etc. I would rather not change much there.... What is the
> > best way to get it to work with a vtkImageActor.
> >
> > Thanks and best regards,
> >
> > Pankaj
> >
> >
>
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