Hi, You should try to update to a recent master, the notion of pre-filtering has been added to do just what you need. You can now create streamlines from cell-centered data, a cell to point interpolation is done for you. You can control this by activating the "Auto convert property" from the settings menu.
Stephane Stephane PLOIX Pilote Opérationnel - Visualisation scientifique EDF - R&D SINETICS 1, Av du Général de Gaulle 92140 Clamart stephane.pl...@edf.fr Tél. : +33 (0) 1 47 65 51 10 Un geste simple pour l'environnement, n'imprimez ce message que si vous en avez l'utilité. mlok...@yahoo.fr Envoyé par : paraview-boun...@paraview.org 09/12/2010 15:42 A paraview@paraview.org cc Objet [Paraview] How to create a c++ plugin using 2 filters (cell data to point data + streamtracer) ? Hi, I have some data that have velocities at cells data. I can use the CellDataToPointData filter and then apply the streamTracer filter. But, I would like to have juste one filter doing this operation. From this filter, I would like to find in its GUI the same parameters as in StreamTracer and also select the vectors I want to display. With the create custom filter it doesn't work because vectors combo box is empty. It is normals because CellDataToPointData has not been executed so streamTracer can't know that is has some vectors to add in the combo box. So I write a C++ plugin that inherits from vtkStreamTracer but it is quite complicated. In fact, I have the same problem: the vectors are not displayed in the combo box. The input vector informations parameters in RequestData has a vtkMultiBlockDataSet that contains geometries and velocities at cells data and the source for the streamtracer. the output contains the vtkPolyData that will be generated by the streamTracer. So, I have to call RequestData 's CellDataToPointData for each block (for that I create a new request, a new input vector and a new output vector). Then I create a new multiblockDataSet that contains geometry and velocities at point data. Then, I want to call RequestData 's StreamTracer but, it has no selected Vectors (velocity) on which doing the operation. So where should I do the CellDataToPointData operation in my plugin in order to be sure that streamTracer can have a exposed vectors in the GUI. I have tried in RequestDataObject (REQUEST_DATA_OBJECT request) but it doesn't work. Any idea how to implement such a plugin ? Thank you. _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview Ce message et toutes les pièces jointes (ci-après le 'Message') sont établis à l'intention exclusive des destinataires et les informations qui y figurent sont strictement confidentielles. Toute utilisation de ce Message non conforme à sa destination, toute diffusion ou toute publication totale ou partielle, est interdite sauf autorisation expresse. Si vous n'êtes pas le destinataire de ce Message, il vous est interdit de le copier, de le faire suivre, de le divulguer ou d'en utiliser tout ou partie. Si vous avez reçu ce Message par erreur, merci de le supprimer de votre système, ainsi que toutes ses copies, et de n'en garder aucune trace sur quelque support que ce soit. Nous vous remercions également d'en avertir immédiatement l'expéditeur par retour du message. Il est impossible de garantir que les communications par messagerie électronique arrivent en temps utile, sont sécurisées ou dénuées de toute erreur ou virus. ____________________________________________________ This message and any attachments (the 'Message') are intended solely for the addressees. The information contained in this Message is confidential. Any use of information contained in this Message not in accord with its purpose, any dissemination or disclosure, either whole or partial, is prohibited except formal approval. If you are not the addressee, you may not copy, forward, disclose or use any part of it. If you have received this message in error, please delete it and all copies from your system and notify the sender immediately by return message. E-mail communication cannot be guaranteed to be timely secure, error or virus-free.
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_______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview