[vtkusers] vtkImageCast Extent-problem

[Leila Baghdadi]

Florian

I believe you must call Update() and/or UpdateInformation() or even 
Modified() to somehow let the pipeline know that the data has changed


hope this helps

Leila

On Wed, 20 Aug 2003, Florian Schmidt wrote:

> 
> Hi,
> 
> i have a volume rendering pipeline which is very basic and the first step in it is a vtkImageCast to get the data into unsigned short format. Now here's the problem:
> 
> The first vtkImageData which is fed into the pipeline is rendered correctly, but when i lateron change the input of the vtkImageCast to a new vtkImageData [with a different Extent], somehow only the old extent is rendered.
> 
> Here's some more details: First i setup the rendering pipeline with some dummy data which is vtkImageData with an extent like 0,32,0,32,0,32. Lateron upon user interaction i want to render a volume of extent 0,256,0,128,0,64, but only the part of this imagedata which fits into the 0,32,0,32,0,32 extent is rendered.. what am i doing wrong? Can i somehow tell the pipeline to propagate the changed extent from the start to the end?
> 
> If you need more details or example code, let me know..
> 
> T.I.A. Florian Schmidt
> 
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