[vtkusers] update confusion
seb-ml-vtk at barre.nom.fr
Mon Oct 30 19:56:53 EST 2000
At 30/10/00 16:35, Sven wrote:
>I am totally confused by how update works.
>It seems when I display a slice of an image volume in a TkImageViewerWidget
>every time I go to a different slice the imaging chain executes again!
sure, as it has to seek for the slice.
>Sometimes, it doesn't execute at all and I receive a "Pixel .. not in memory
you may be out of bounds/extent.
>How can I have the chain execute one for the whole volume independent
>on what's on the screen?
if your object is named "reader", then :
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.
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