[vtkusers] python vtkSelection problem

[Jeff Baumes]

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