[Paraview] Programmable Source & MultiBlockDataSet

[Aurélien Marsan]

Yet I understand why it's not possible to work with TemporalDataSet in
Paraview.
The output of the PVDReader is a MultiBlockDataSet, and the PVDReader
redirect the reader based on the time value.

... Is it possible to create a programmable source that would be aware of
the timestep ?
Or do I have to abandon python and write a reader in the C++ source ?

Le 23 avril 2010 17:15, Aurélien Marsan <aur.marsan at gmail.com> a écrit :

> ah....
>
> So : I use file in format v3d.
> For a mesh that contains two blocks, they would be called called
> block1_timestep1.v3d, block2_timestep1.v3d, block1_timestep2.v3d,
> block2_timestep2.v3d, etc...
>
> Actually, I open these v3d_files with a python tool that I have
> writen, translate them as vtk.vtkStructuredGrid, and write several files on
> the disk as TimeStep1.vtm, TimeStep2.vtm and Simulation.pvd
> But this takes a lot a disk space, and reading/writing takes a lot of time.
>
>
> So I would like to open the v3d file directly in paraview.
> That's why I though to use a Programmable Source in order to read all v3d
> files and create a "Temporal Data Set".
>
>
> Le 23 avril 2010 16:35, Utkarsh Ayachit <utkarsh.ayachit at kitware.com> a
> écrit :
>
> Temporal DataSet! Filters shouldn't be producing temporal dataset
>> explicitly. Why do you need it?
>>
>> Utkarsh
>>
>> 2010/4/23 Aurélien Marsan <aur.marsan at gmail.com>:
>> > thanks !
>> > And so, could you add "Temporal Data Set" to this commit ?
>> > Le 23 avril 2010 16:28, Utkarsh Ayachit <utkarsh.ayachit at kitware.com> a
>> > écrit :
>> >
>> >> I've just committed a change to ParaView to allow setting output type
>> >> to be a multiblock dataset.
>> >>
>> >> Commit id: c7472789ba86210e190f398a90eebc081a66d40c
>> >>
>> >> Utkarsh
>> >>
>> >> 2010/4/23 Aurélien Marsan <aur.marsan at gmail.com>:
>> >> > I found a solution to do what I wanted to do. Not really elegant, but
>> it
>> >> > works.
>> >> > The best would be to encode the reader in the source code.... but I
>> >> > don't
>> >> > know how to do, and have no time for now.
>> >> >
>> >> > First, I use the tool Source -> Data Object Generator, and create a
>> >> > MultiBlockDataSet.
>> >> >>
>> >> >> MB{}
>> >> >
>> >> >
>> >> > Then, I use a Programmable Filter, and set the Output Data Type "Same
>> as
>> >> > Input".
>> >> > So I can use this script.
>> >> >
>> >> >>
>> >> >> from Moduleperso import *
>> >> >> m = MultiBlocFromV3D(........)       # This is a personnal reader in
>> >> >> python, that returns a vtkMultiBlockDataSet
>> >> >> self.GetOutputDataObject(0).DeepCopy(m)
>> >> >
>> >> >
>> >> > Hope this will help some people who don't want to go in source
>> code...
>> >> >
>> >> > Le 23 avril 2010 14:07, Aurélien Marsan <aur.marsan at gmail.com> a
>> écrit :
>> >> >>
>> >> >> Maybe I have found a way to avoid the Programmable Source...
>> >> >>
>> >> >> But Is it possible to export an object created in the python shell
>> >> >> directly into the pipeline of the paraview interface ?
>> >> >>
>> >> >> Le 22 avril 2010 15:36, Aurélien Marsan <aur.marsan at gmail.com> a
>> écrit
>> >> >> :
>> >> >>>
>> >> >>> Hi,
>> >> >>>
>> >> >>> A new thing I don't know how to do with Paraview.
>> >> >>> I have written a personnal reader, that creates vtkStructuredGrid
>> from
>> >> >>> files written in so called format "v3d". So I'm able to construct a
>> >> >>> MutliBlockDataSet, that is composed of all the Blocks I'm working
>> >> >>> with.
>> >> >>>
>> >> >>> I would like to use "Programmable Source", so we don't need to
>> write
>> >> >>> the
>> >> >>> file on the disk before to open it with Paraview.
>> >> >>> Does "Programmable Source" work with MultiBlockDataSet ? I don't
>> see
>> >> >>> this
>> >> >>> class in the Output Data Set Type that we can choose...
>> >> >>>
>> >> >>> And is it correct if I write in the Script of the Programmable
>> Filter
>> >> >>> :
>> >> >>>
>> >> >>> from perso import *
>> >> >>> multiblock = MultiBlockDataSetFromV3D(.....)
>> >> >>> self.GetOutput().DeepCopy(multiblock)
>> >> >>>
>> >> >>> Thanks for help.
>> >> >>>
>> >> >>> A.MARSAN
>> >> >
>> >> >
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