[Paraview-developers] REQUEST_INFORMATION not being called

[Biddiscombe, John A.]

Berk

Unfortunately, volumerendering is disabled when using a multiblock structure. I'll have to explore the information method.

Is your extents branch fit for experimentation?

JB

From: Berk Geveci [mailto:berk.geveci at kitware.com]
Sent: 11 November 2013 15:51
To: Biddiscombe, John A.
Cc: paraview-developers at paraview.org
Subject: Re: [Paraview-developers] REQUEST_INFORMATION not being called

Hi John,

UpdateInformation has never been called every time step. Overall, VTK's support for extent changing over time is not so great. There is a pipeline pass - REQUEST_TIME_DEPENDENT_INFORMATION() - that is called every time step. So your data source can update the extent information during that pass. However, note that not all filters will behave properly because they may allocate or set other information related to extent during RequestInformation. I have a long standing branch that aims to clean up extents, time support etc. and I hope to focus on getting that in over the next few months. The safest approach is to wrap your image data with a multi-block dataset currently.

Best,
-berk

On Mon, Nov 11, 2013 at 7:56 AM, Biddiscombe, John A. <biddisco at cscs.ch<mailto:biddisco at cscs.ch>> wrote:
I have a dataset which is vtkImageData and it changes size over time. When animating this, the extent handling is breaking when the image changes size.
My initial attempts to fix it have failed and I suspect I need to force an update information at the renderwindow end when Update is called - the mappers are not honouring the extents (even outline filters are getting the shape wrong).

It used to be that information was updated on every time step. Did something change?

It's possible to replicate this by simply creating a wavelet {-10,10} and saving it as image_000.vti, then making the wavelet bigger {-10,20} and saving as image_001.vti. Now load them as a time series and step forward. The image is not correctly displayed. One can verify by loading the image separately.

Where would be the correct place to force an UpdateInformation in the render process?

thanks

JB


--
John Biddiscombe,                        email:biddisco @.at.@ cscs.ch<http://cscs.ch>
http://www.cscs.ch/
CSCS, Swiss National Supercomputing Centre  | Tel:  +41 (91) 610.82.07<tel:%2B41%20%2891%29%20610.82.07>
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