[Paraview] Programmable Source & MultiBlockDataSet

Mon Apr 26 04:39:18 EDT 2010

Thank for this example.

But I'm trying to apply this to my case, and have one question again .....
:-|

 # TODO: Generate the data as you want.

---> That should be the DataSet at one timestep ?
How does the programmable source handle the change of the filename to read ?
Should I use a command sort of "executive.GetActiveTimeStep()" when I define
the filename to read ?

Le 23 avril 2010 20:48, Utkarsh Ayachit <utkarsh.ayachit at kitware.com> a
écrit :

> I've added an example to the Wiki showing how to produce timesteps
> from programmable source.
>
> http://www.paraview.org/Wiki/Here_are_some_more_examples_of_simple_ParaView_3_python_filters.#Producing_Data_with_Timesteps_.28Source.29
>
> There's one caveat currently. The GUI does not realize the timesteps
> being produced, so you will have to manually adjust the time ranges
> for the animation using the Animation View.
>
> Utkarsh
>
> 2010/4/23 Aurélien Marsan <aur.marsan at gmail.com>:
> > 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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> >>> >> > Please keep messages on-topic and check the ParaView Wiki at:
> >>> >> > http://paraview.org/Wiki/ParaView
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> >>> >> >
> >>> >
> >>> >
> >>
> >
> >
>
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