Utkarsh,
for me is actually ok, as you suggested, to use the Extract Selection filter as
a "black box". It will do what I need, which is to get the global id's of the
nodes which the user selected (no matter how). The Extract Selection filter
does exactly this job, right ? At least I'm able to do using it by hands in
ParaView.
I'm just having difficulties in setting up the inputs of this filter. It seems
that the class vtkPVExtractSelection is an interface for the already existing
filter vtkExtractSelection. The latter requires the vtkDataObject, from which
we want to extract a piece, and a vtkSelection object, which represents the
selected points or cells (Actually this is what is stated in
vtkExtractSelection::FillInputPortInformation and opposed as explained in the
documentation, so the docs might be wrong). My question is, how can I get -
from my filter's code - a vtkSelection object, which represents exactly what
the user is selecting in ParaView's screen ? If I am able to get this
information, I can use the vtkPVExtractSelection filter and the job is done !
Thanks for your attention.
Best Regards,
Rafael.
--- On Mon, 6/15/09, Utkarsh Ayachit <utkarsh.ayac...@kitware.com> wrote:
From: Utkarsh Ayachit <utkarsh.ayac...@kitware.com>
Subject: Re: [Paraview] Getting Blocks Selection
To: "Rafael March" <rafaelmar...@yahoo.com>
Cc: paraview@paraview.org
Date: Monday, June 15, 2009, 7:45 PM
Rafael,
pqSelectionManager::getGlobalIDs takes all the necessary steps and then
delegates to vtkSelectionConvertor filter to do the actual conversion. So if
you fix vtkSelectionConvertor to convert from blocks to ids, then
pqSelectionManager::getGlobalIDs should automatically work. Look at
implementation of pqSelectionManager::getGlobalIDs to see how the two inputs
are set up.
Utkarsh
On Mon, Jun 15, 2009 at 3:06 PM, Rafael March <rafaelmar...@yahoo.com> wrote:
Hi Utkarsh,
thanks for the tip. I'm trying now to use the vtkExtractSelection filter, but
it requires two inputs: a vtkSelection object, and the Model, whose block will
be extracted, according to the selection. The question now is: how to get the
vtkSelection object which corresponds to my current selection made in Paraview
? I can only manage to get a pqSelectionManager object in my filter.
Thanks again for the help.
Regards,
Rafael.
--- On Mon, 6/15/09, Utkarsh Ayachit <utkarsh.ayac...@kitware.com> wrote:
From: Utkarsh Ayachit <utkarsh.ayac...@kitware..com>
Subject: Re: [Paraview] Getting Blocks Selection
To: "Rafael March" <rafaelmar...@yahoo.com>
Cc: paraview@paraview.org
Date:
Monday, June 15, 2009, 3:13 PM
Currently there's no direct way of converting from block to id-based selection.
vtkConvertSelection does not handle the case where the input is a block-based
selection. Feel free to add a feature request to the bug tracker.
A possible alternative would be to apply the ExtractSelection filter and then
fetch the resulting dataset to the client. That will have the ids for the
extracted block.
Utkarsh
On Mon, Jun 15, 2009 at 10:53 AM, Rafael March <rafaelmar...@yahoo.com> wrote:
Hi,
I want to get the global Ids of the nodes selected through
selection inspector, using a "Block Selection" to choose a part of the
model.
I thought I would be able to retrieve the ids of the
cells (or points) with the method pqSelectionManager::getIndices() or
pqSelectionManager::getGlobalIds(), but none of them retrieve any Ids
when I make the selection of a block.
Which is the right way to get this information ?
Regards,
Rafael.
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