[Paraview] Trouble making simple VTK filter plugin

[Jérôme]

Hi,

I took a look at your xml, and I didn't find any problems... So I verify in
the VTK doc if you didn't misused the vtkIterativeClosestPointTransform,
that I never had to work with. Especially, I checked the input data types
(that was one of my major crashes' cause!) and I found that this filter is
not a vtkAlgorithm (in the OO sense). And I think, but ParaView developers
have to confirm this, that the ParaView proxy -that's what you described in
your XML- concept is linked to vtkAlgorithm.

If I am right, you cannot use the "Enabling VTK filters in ParaView"
wiki-way. In your case, you certainly will have to write a subclass of
vtkAlgorithm that outputs a matrix of transformation.

Sorry for not being of more helps...

Jerome

2009/10/25 David Doria <daviddoria at gmail.com>

> On Sun, Oct 25, 2009 at 8:59 AM, Jérôme <jerome.velut at gmail.com> wrote:
> > Hi David,
> > I have to expose a lot of native VTK filters that are not in ParaView. I
> > never had to use a CMakeLists and a _GUI XML. In my mind, your input
> > properties should be totally described in your ICP. xml file. For example
> on
> > how to write proxy property elements, you should take a look at
> > Paraview3/Servers/ServerManagers/Resources/filtering.xml. It was
> sufficient
> > for me for many VTK filters, before I bought for the Paraview book.
> >
> > steps:
> >    - write your xml description of the wanted VTK filter
> >    - run ParaView
> >    - Tools -> Manage Plugin/Extension
> >    - "Load New"
> >    - choose "Files of type" -> *.xml
> >    - pick your file -> OK
> >
> > Then your filter should appear in the filters list.
> >
> > Hope that helps
> > Jerome
> >
> > (Attached is an example of how I expose vtkImageMathematic to Paraview.)
>
> Jerome,
>
> Thanks for the example. It is really nice not having to write the GUI
> manually, in most cases this automatic window that pops up should be
> sufficient. Is there any advantage of compiling into a library before
> loading into paraview?
>
> I tried to modify your file into my ICP filter. However, when I try to
> load my modified version, Paraview simply crashes as soon as I select
> the ICP filter from the filters menu. The only changes I made were to
> change the input types from vtkImageData to vtkDataSet and remove the
> rest of the properties, leaving only Source and Target. I tried
> port_index of the second input as 0 and 1 (what does this actually
> do?) with no change. Would you mind taking a look at the attached
> file?
>
> Thanks,
>
> David
>
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