[vtkusers] possible bug in vtkProgrammableSource

[Lisa Avila]

Malcolm,

Bill's solution is the right one - the problem is that unless you tell it, 
the structured points won't know what the whole extent it. This is a 
required value (should be documented better) of a programmable source. It 
is actually a requirement of the UpdateInformation method of all sources / 
filters (this is where the programmable method is called).

At some point in the past (maybe 3.1) VTK used to "correct" your whole 
extent for you if it wasn't set. I believed this caused problems and was 
replaced by the notion that all sources/filters must set the whole extent.

Lisa



At 10:26 AM 4/15/2002, Lorensen, William E (Research) wrote:
>Looks like the problem still exists in 4.0. I added a line:
>
>  $out SetWholeExtent 0 9 0 9 0 9
>
>to the proc and all works well. I suspect some changes in  the pipeline 
>update mechanism is causing
>it to fail without the SetWhOLEeXTENT.
>
>Bill
>
>
>-----Original Message-----
>From: Malcolm Drummond [mailto:malcolm at geovision.co.za]
>Sent: Sunday, April 14, 2002 4:41 PM
>To: vtkusers
>Subject: [vtkusers] possible bug in vtkProgrammableSource
>
>
>Hi
>
>I've found a problem with the programmable source object while upgrading 
>some scripts from 3.1 to 3.2
>(built from source downloaded around Jan 2002). It appears that the 
>StructuredPointsOutput is not
>being updated (perhaps only the polydata output works properly). The 
>attached script works fine under
>3.1. Does anyone know anything about this bug? Maybe it's been fixed, but 
>I couldn't find anything in
>the archives.
>
>Also, I don't have 4.0 installed yet - if there aren't any regression 
>tests on the different output
>types could someone try this script.
>
>Malcolm
>
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