[vtkusers] python vtkSelection problem

[Olivier Feys]

Many thanks Jeff,

For the moment I use the same revision as in the latest release version of
paraview, I will updata my revision then
Can you explain why, when there is only a single actor(from
vtkUnstructuredGrid), the returned vtkSelection contains a lot of
vtkSelectionNode objects, with only a single tuple in their selection data ?

Olivier

On Tue, Feb 2, 2010 at 2:43 PM, Jeff Baumes <jeff.baumes at kitware.com> wrote:

> This needs a wrapper-friendly API. In C++ you would do
>
> vtkProp* p =
> vtkProp::SafeDownCast(node->GetProperties()->Get(vtkSelectionNode::PROP()));
>
> It would be nice to be able to do the following
>
> vtkProp* p = node->GetProp();
>
> which would be accessible from wrapped languages.
>
> ...
>
> I've added GetProp, SetProp to vtkSelectionNode in CVS head.
>
> Patch title (first comment line): ENH: Adding Get/SetProp to
> vtkSelectionNode.
> Autocommit
>  cvs commit -F .msg 'Filtering/vtkSelectionNode.cxx'
> 'Filtering/vtkSelectionNode.h'
> Committer: Jeffrey Baumes <jeff.baumes at kitware.com>
> /cvsroot/VTK/VTK/Filtering/vtkSelectionNode.cxx,v  <--
> Filtering/vtkSelectionNode.cxx
> new revision: 1.5; previous revision: 1.4
> /cvsroot/VTK/VTK/Filtering/vtkSelectionNode.h,v  <--
> Filtering/vtkSelectionNode.h
> new revision: 1.6; previous revision: 1.5
> Committed successfully to CVS
>
> Jeff
>
> On Tue, Feb 2, 2010 at 4:09 AM, Olivier Feys <pytkvtk at gmail.com> wrote:
> > I want to handle selection through multiple vtkUnstructuredGrids by
> picking
> > a particular cell or by making a selection with a rubberband interactor.
> > I can easily create a vtkSelectionNode from a picked cell and add a
> > vtkSelectionNode to a vtkSelection.
> >
> > The problem is when I get a vtkSelection made on several actors.props. I
> > can't find any example where the prop/actor is got from the
> vtkSelectionNode
> > object.
> > How can I, from a selection returned by the vtkHardwareSelector, get, for
> > each vtkSelectionNode, the actor that it belongs to ?
> > When I print the vtkSelectionNode, I can see the property PROP_ID but I
> > can't use it.
> > By the way, if I have only one actor, the returned vtkSelection contains
> > always more than one vtkSelectionNode. Why is that ?
> >
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>
> --
> Jeff Baumes, Ph.D.
> R&D Engineer, Kitware Inc.
> (518) 881-4932
> jeff.baumes at kitware.com
>
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