[vtkusers] update confusion
dgobbi at irus.rri.on.ca
Mon Oct 30 20:25:39 EST 2000
On Tue, 31 Oct 2000, Sebastien BARRE wrote:
> At 30/10/00 16:35, Sven wrote:
> >How can I have the chain execute once for the whole volume independent
> >on what's on the screen?
> if your object is named "reader", then :
> reader UpdateWholeExtent
> will do the trick by reading the whole stuff in memory.
> if you use vtkImageReslice to display a slice from a volume, you do not
> need that, but if you use two different vtkImageReslice (or objects) on the
> same reader, then use UpdateWholeExtent once.
Whoa, not quite true. If you use vtkImageReslice to display a slice from
the volume, you should still call 'reader UpdateWholeExtent.' There are
some circumstances that cause vtkImageReslice to Update the whole extent
of its input, but usually it only Updates a portion of its input.
David Gobbi, MSc dgobbi at irus.rri.on.ca
Advanced Imaging Research Group
Robarts Research Institute, University of Western Ontario
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