<br><font size=2 face="sans-serif">Hi,</font>
<br>
<br><font size=2 face="sans-serif">You should try to update to a recent
master, the notion of pre-filtering has been added to do just what you
need. </font>
<br><font size=2 face="sans-serif">You can now create streamlines from
cell-centered data, a cell to point interpolation is done for you.</font>
<br><font size=2 face="sans-serif">You can control this by activating the
"Auto convert property" from the settings menu.</font>
<br>
<br><font size=2 face="sans-serif">Stephane<br>
<br>
<br>
</font>
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<td><font size=1 face="sans-serif"> </font>
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<td><font size=1 color=#ff8100 face="Arial"><b>Stephane PLOIX</b></font><font size=1 color=#ff8100 face="Arial"><b><br>
Pilote Opérationnel - Visualisation scientifique</b></font><font size=1 color=#0062e1 face="Arial"><br>
EDF - R&D<br>
SINETICS<br>
1, Av du Général de Gaulle<br>
92140 Clamart</font><font size=1 color=#0062e1 face="sans-serif"><br>
</font>
<br><font size=1 color=#0062e1 face="Arial"><b>stephane.ploix@edf.fr</b></font>
<br><font size=1 color=#0062e1 face="Arial">Tél. : +33 (0) 1 47 65 51
10</font>
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<td><font size=1 color=#0062e1 face="Arial">Un geste simple pour l'environnement,
n'imprimez ce message que si vous en avez l'utilité.</font></table>
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<td width=40%><font size=1 face="sans-serif"><b>mlokida@yahoo.fr</b> </font>
<br><font size=1 face="sans-serif">Envoyé par : paraview-bounces@paraview.org</font>
<p><font size=1 face="sans-serif">09/12/2010 15:42</font>
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<div align=right><font size=1 face="sans-serif">A</font></div>
<td><font size=1 face="sans-serif">paraview@paraview.org</font>
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<div align=right><font size=1 face="sans-serif">cc</font></div>
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<div align=right><font size=1 face="sans-serif">Objet</font></div>
<td><font size=1 face="sans-serif">[Paraview] How to create a c++ plugin
using 2 filters (cell data to point
data + streamtracer) ?</font></table>
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<br><font size=3 face="Roman">Hi,<br>
<br>
I have some data that have velocities at cells data. I can use the CellDataToPointData
filter and then apply the streamTracer filter.<br>
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.<br>
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.<br>
<br>
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. <br>
<br>
The input vector informations parameters in RequestData has a vtkMultiBlockDataSet
that contains geometries and velocities at cells data and the source for
the streamtracer.<br>
the output contains the vtkPolyData that will be generated by the streamTracer.<br>
<br>
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.<br>
<br>
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.<br>
<br>
I have tried in RequestDataObject (REQUEST_DATA_OBJECT request) but it
doesn't work.<br>
<br>
Any idea how to implement such a plugin ?<br>
<br>
Thank you. </font>
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