Utkarsh, actually I would like to get vtkPointData from Server, the nodes global id's. I'm taking a look at the vtkPVDataSetAttributesInformation class, but I don't think it will provide this information, am I right ? As a meta data, I can't get really the data, just some information about it...
Regards, Rafael. --- On Wed, 12/17/08, Utkarsh Ayachit <utkarsh.ayac...@kitware.com> wrote: From: Utkarsh Ayachit <utkarsh.ayac...@kitware.com> Subject: Re: [Paraview] Object Panel <-> Model Communication To: rafaelmar...@yahoo.com Cc: paraview@paraview.org Date: Wednesday, December 17, 2008, 9:32 PM Rafael, It is possible to get the output of a filter in a custom panel. But it most certainly is not recommended. Fetching data from the output of any filter/source should be done only by views such as the render view/xy line plot view/ spreadsheet view etc. However if you insist on getting the data to the client side create a client-delivery representation. Look at the implementation of "Fetch()" function in Utilities/VTKPythonWrapping/paraview/servermanager.py for details. However I'd still recommend to rethink -- do you really need the full data or just some meta-data that can be obtained from the vtkPVDataInformation associated with the input? Utkarsh On Wed, Dec 17, 2008 at 10:58 AM, Rafael March <rafaelmar...@yahoo.com> wrote: > Thanks a lot Utkarsh, > > I'm already testing and learning about the Information Properties, and I > realized this is exactly what I need, concerning the Client/Server > Communication. > > Let me try to explain what I asked about the visualization pipeline: > Suppose I have an unstructured grid.Then, my filter associate an integer > number, from 0 to 6, to each cell, according to an algorithm. My filter also > implements a custom object panel. Then I clip my model, through the Clip > Filter. Is it possible to get the output of the Clip (that is, the nodes > that weren't cutted off )from my custom filter code (which stays before the > Clip filter in the pipeline) ? > > Regards, > Rafael March. > > --- On Tue, 12/16/08, Utkarsh Ayachit <utkarsh.ayac...@kitware.com> wrote: > > From: Utkarsh Ayachit <utkarsh.ayac...@kitware.com> > Subject: Re: [Paraview] Object Panel <-> Model Communication > To: rafaelmar...@yahoo.com > Cc: paraview@paraview.org > Date: Tuesday, December 16, 2008, 2:17 PM > > To get back "values" from the server, you can use either > "information > properties" or "information objects". > > Information properties are properites with information_only="1" set > in > the XML (eg. in Servers/ServerManager/Resources/rendering.xml the > "Camera" proxy has "CameraPositionInfo" as an information > property). > Such properties need an "InformationHelper" which knows how to obtain > the values from the server. For simple Get*() methods, you can use the > <SimpleDoubleInformationHelper/> or <SimpleIntInformationHelper /> > etc. based on the type of the property. Complex information helpers > can be written as well. Look at > TimeStepsInformationHelper > (vtkSMTimeStepsInformationHelper.h|cxx) as an example. > > Information objects are used to get data from server which cannot be > simply put in a property for example information about the data object > produced by a filter (vtkPVDataInformation). These are > vtkPVInformation subclasses. You can create you own vtkPVInformation > subclass that knows how to collect information and then > serialize/deserialize it for transfer to the client from the server > (if needed). To gather such information, one uses > vtkProcessModule::GatherInformation(vtkIdType connectionID, > vtkTypeUInt32 serverFlags, vtkPVInformation* info, vtkClientServerID > id) where "id" is vtkSMProxy::GetID() returned for the proxy from > which you want to collect the information. > > In your case, information property may be an easier solution -- if I > understand your problem correctly. > > There is a pqServerManagerModel instance > accessible as > pqApplicationCore::instance()->getServerManagerModel() that can be > used to access sources/filters their representations, views etc. Take > a look at Qt/Core/pqServerManagerModel.h for the API. That should help > you access the visualization pipeline. > > "How to get, for instance, the ids of the nodes which are displayed > after the application of a filter to the model ?" > Not sure I understand what you mean by that. Can you please elaborate? > > Utkarsh > > On Tue, Dec 16, 2008 at 6:38 AM, Rafael March <rafaelmar...@yahoo.com> > wrote: >> Hey all, >> >> I'm programming a filter with a custom Object Panel, >> and I'm feeling a little bit lost about the ParaView architecture and >> code design. >> >> My great problem is the comunication between the >> Object Panel and the Model. I know I can't have a pointer to my >> vtkUnstructuredGrid displayed, 'cause they are not > necessarily at the >> same machine or process. I also know that I'm able to send information >> to the model through properties, since I can get the vtkSMProxy in my >> panel. But what about the way back ? Is there a way to send information >> from the display view to the panel ? How can I display in a QTable, for >> instance, the nodes of my model which have some property equals to 1 ? >> >> Another problem is the Visualization Pipeline: is there a way to > "walk" on >> it ? >> I mean, if I have a filter name, am I able to get the the filter no >> matter where it is in the Pipeline ? >> >> Sorry for the mess with the questions. I hope I made it clear and someone >> can help me ! :) >> >> Regards, >> Rafael March. >> >> _______________________________________________ >> ParaView mailing list >> ParaView@paraview.org >> > http://www.paraview.org/mailman/listinfo/paraview >> >> > > > _______________________________________________ > ParaView mailing list > ParaView@paraview.org > http://www.paraview.org/mailman/listinfo/paraview > >
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