[vtkusers] vtkImagePlaneWidget: interpolated cursor position

[John Biddiscombe]

But Probefilter doesn't let you toggle between NearestNeighbour, Linear or
Cubic which your reslice snippet would do.

$0.02
JB

----- Original Message ----- 
From: "David Gobbi" <dgobbi at imaging.robarts.ca>
To: <dean.inglis at camris.ca>
Cc: <vtkusers at vtk.org>
Sent: Friday, January 09, 2004 6:21 AM
Subject: Re: [vtkusers] vtkImagePlaneWidget: interpolated cursor position


> Hi Dean,
>
> Thanks for jumping into the discussion.  See comments below.
>
>
> On Thu, 8 Jan 2004 dean.inglis at camris.ca wrote:
>
> > John, David,
> >
> > 1) vtkIPW allows you to set the picker, so you could 'listen' in as
> > an obsever through the callback mechanism, although I've never tried.
>
> I missed that!  So it should be possible to just do
>   picker = vtkCellPicker()
>   planeWidget.SetPicker(picker)
> and then each time you want to get the value at screen coords (X,Y):
>   planeWidget.UpdateCursor(X,Y)
>   x,y,z = picker.GetPickPosition()
> and finally the vtkImageReslice code that I included in my previous email.
>
> > 2) when I made the cursor feature, what I really wanted was what
> > you are requesting John: interpolated voxel data and not
> > nearest neighbour as it is now.  If David or anyone else would
> > like to add that in .... :)
>
> "Anyone else" can kindly take a look at the code in vtkProbeFilter.cxx as
> the best example of interpolating a value from a vtkDataSet in C++ ;)
>
>  - David
>
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