[Paraview] Magic Crop Filter

[Eric E. Monson]

Hey Christian,

I'm definitely not an expert in this, but just so you know, there are some ways of getting information about your data set automatically to fill default values in the auto-generated GUI panels. 

All of this is covered in Ch 18.6, Server Manager XML, in the ParaView Guide, and you can search through the XML files used in ParaView in [PVsrc]/Servers/ServerManager/Resources/filters.xml for things like BoundsDomain and ExtentsDomain for examples. There are also various "InformationHelper" types, too.

Talk to you later,
-Eric

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Eric E Monson
Duke Visualization Technology Group


On Apr 20, 2010, at 5:57 AM, Christian Werner wrote:

> Hi!
> 
> Today, I made a very interesting experience. I wanted to have the vtkImageClip functionality available in Paraview and performed the same steps as always to get a Paraview-Plugin out of a VTK Filter. I compiled the plugin, called it ImageClip and copied it over to my Paraview Plugin directory. Then I started Paraview. When browsing through my custom "Extensions" Filters-entry, I found that there is no ImageClip but a Crop! And this crop provided me with a nice GUI, letting me change the output size with spinbuttons and already providing the maximum x/y/z extents! Wow! It was like if Paraview said "Ah, I know that vtk Filter and I happen to know which parameters it likes and how to preset its values. You surely won't mind if I ignore your ServerManager xml and do all by myself, do you?"
> 
> How comes? And the most interesting part is: how can I make the ServerManager xml define default values that are actually variables (such as the image extents)? And why does Paraview handle vtkImageClip differently?
> 
> Best regards,
> Christian
> 
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