So, I use the Modified() method that updates the internal time stamp for the
object (from "The VTK User's Guide").
When I have attributes (points attributes of a vtkpolydata) with the same time
steps, everything is fine and when I switch from one attribute to an other, the
requested Time step is ok (because we have the same time steps).
But, when I have attributes with differents time steps (ex: A [1, 5, 10] and B
[2, 6, 11]) there is a problem of update. If I switch from an attribute to an
other, the requested time step for the new selected attribute is the requested
time step of the previous attribute.
So how can I correctly update the requested time steps of the vtk pipeline when
I updarte time steps and time range of the vtk pipeline ?
________________________________
De : R M <mlokida at yahoo.fr>
À : paraview at paraview.org
Envoyé le : Mer 24 novembre 2010, 14h 49min 36s
Objet : [Paraview] How to update GUI/paraview when data and time change in a
reader ?
Hi,
Here’s my problems. I have a reader that load a geometry and some attributes (at
the points). These attributes changed in the time and I can select one of them
in a combo box (GUI in the reader).
For example, I have 2 attributes «A» and «B». So In the reader, by default the
first attribute is seleted (« A »). The selection in the reader GUI makes the
call of a method doing the change of the selected attribute (« A ») and
corresponding time values. For time values it looks like this :
vtkDemandDrivenPipeline* ddp =
vtkDemandDrivenPipeline::SafeDownCast(this->GetExecutive());
vtkInformationVector* outputVector = ddp->GetOutputInformation();
vtkInformation* outInfo = outputVector->GetInformationObject(0);
outInfo->Set(vtkStreamingDemandDrivenPipeline::TIME_STEPS(), & timeData[0],
numTimeData);
doubletimeRange[2];
timeRange[0] = timeData[0];
timeRange[1] = timData[numTimeData-1];
outInfo->Set(vtkStreamingDemandDrivenPipeline::TIME_RANGE(), timeRange, 2);
The problems are the following. When I select «B» and make apply, timevalues
corresponding to «B» are set and a new vtkPolyData is made with the
corresponding point attribute data of «B» for the given time step. But, in
paraview, the mapped variable of the toolbars is not update. «A» is always here
(whereas I would like to have «B»).
-> How and where can we say to paraview to update the GUI and have the B appears
in the mapped variable of the toolbars ?
Moreover, Paraview has a geometry cache (Edit/settings /Animation). But when
for example atributes «A» and «B» have the same time values and that we have
selected all the time step for « A », when we select «B», nothing is done
because paraview has cached data for the «A» and for the same time values than
«B». So paraview doesn’t need to update beacause it considerer to have data for
the requested time step.
-> So, How can I say to Paraview that when a new attribute is selected, it needs
to empty it’s cache and load data for requested time ?
Thank you.
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