[Paraview] Can I generate a single file that contains data and filter settings?

Wyatt Spear wspear at cs.uoregon.edu
Wed Jan 31 16:51:42 EST 2018 

The data that I'm generating has a set of scalar values for every point in
the 2D matrix, so a single data row looks like
xcoord, ycoord, zcord(probably superfluous), scalar1, scalar2,...scalarN
Since the data in your example is being rendered as an image directly I'm
not sure how I could incorporate different scalar data which can be
selected from the UI, as I can when running the table-to-points filter on a
loaded CSV file.

Is there a way to have a python macro cause ParaView to request a file
selection through the UI? Then I could have this single macro loaded and it
could process any CSV file I select.

Thanks,
Wyatt

On Wed, Jan 31, 2018 at 8:23 AM, Cory Quammen <cory.quammen at kitware.com>
wrote:

> Wyatt,
>
> Here's a simple script that sets up a 200 x 200 image data object like
> you might use for displaying a heat map.
>
> #### import the simple module from the paraview
> from paraview.simple import *
> #### disable automatic camera reset on 'Show'
> paraview.simple._DisableFirstRenderCameraReset()
>
> # Create a 2D image data object
> from paraview import vtk
> vtk_image = vtk.vtkImageData()
> vtk_image.SetDimensions(200, 200, 1) # Your size may vary
>
> # Wrap data in numpy interface
> from vtk.numpy_interface import dataset_adapter as dsa
> image = dsa.WrapDataObject(vtk_image)
>
> # Create numpy array. Set your data here
> import numpy as np
> arr = np.zeros(200*200)
>
> # Set the data in the image object
> image.PointData.append(arr, 'myarray')
>
> # Now set up a ParaView proxy for the image data
> tp = PVTrivialProducer()
> tp.GetClientSideObject().SetOutput(vtk_image)
> Show(tp)
>
>
> # Set up filters, display options, etc. below
>
>
> You can modify it as needed to set up your data array as a numpy array.
>
> Hope that helps,
> Cory
>
> On Mon, Jan 29, 2018 at 3:27 PM, Wyatt Spear <wspear at cs.uoregon.edu>
> wrote:
> > I think the python scripting with embedded data is worth a try. I'm not
> > familiar with the built-in vs other server modes so I'm not sure what
> kind
> > of restrictions that entails.  Probably my ultimate goal is to build a
> > reader plugin that will parse the data out of my application's native
> format
> > but generating a script seems like a decent interim solution.
> >
> > Thanks,
> > Wyatt
> >
> > On Mon, Jan 29, 2018 at 5:57 AM, Cory Quammen <cory.quammen at kitware.com>
> > wrote:
> >>
> >> Wyatt,
> >>
> >> ParaView provides extensive Python scriptability. One solution is to
> >> write out a Python script from your program. Within the Pythons
> >> script, you set up the data, set up filters and modify visualization
> >> settings just as you wish. Once it is loaded, you can continue to
> >> explore your data by creating new filters, changing visualization
> >> parameters, and so on.
> >>
> >> Creating example Python scripts is easy using the Trace functionality
> >> (Tools menu -> Start Trace) - you just interact with the UI and the
> >> equivalent Python operations will be written to the trace file. Use
> >> such a trace as a basis for what is written from your program.
> >>
> >> To save the data to the Python script and then load it is a different
> >> use case from what we typical support, but I think it is doable. It
> >> would just look a little ugly (and it would only work in built-in
> >> server mode). Basically, you could write out your data in a NumPy
> >> array within the script, as if you were entering the array information
> >> by hand, then provide that data to what's called a TrivialProducer
> >> source. This source would stand in place of a reader. There is a
> >> little bit of code required to do that that isn't super obvious -
> >> before sketching it out, would this approach work for your needs?
> >>
> >> Thanks,
> >> Cory
> >>
> >>
> >>
> >> On Sun, Jan 28, 2018 at 10:10 PM, Wyatt Spear <wspear at cs.uoregon.edu>
> >> wrote:
> >> > Thanks, I'll take a look at this. My use case is pretty severely
> >> > underutilizing ParaView's capabilities though. I'm rendering very
> large
> >> > multi-variable heat maps. So color mapped 2d points are all I need
> >> > rendered,
> >> > (until I can figure out how to map glyph height to another variable).
> >> >
> >> > =Wyatt
> >> >
> >> >
> >> > On Sat, Jan 27, 2018 at 8:52 AM Samuel Key <samuelkey at bresnan.net>
> >> > wrote:
> >> >>
> >> >> Wyatt--
> >> >>
> >> >> While ParaView can read CSV files and subsequently generate images,
> the
> >> >> CSV format for simulation results limits the functionality available
> to
> >> >> you
> >> >> in ParaView. My suggestion is that you write your simulation results
> in
> >> >> a
> >> >> format that contains geometry information, as well as, Point and Cell
> >> >> centered values like displacement, velocity, acceleration,
> temperature,
> >> >> concentrations, volume fractions, et cetera.
> >> >>
> >> >> The attached document is a good place to start. (This document is
> very
> >> >> concise and very complete, but the information is only written down
> >> >> once. As
> >> >> a result, the format information is sometimes not located where you
> >> >> need
> >> >> it.)
> >> >>
> >> >> If your simulations are concerned with the deformation of 3-D solids
> >> >> and
> >> >> structures, I can provide you with FORTRAN95 routines that you can
> use
> >> >> to
> >> >> write VTK-formatted simulation results.
> >> >>
> >> >> Once you can generate VTK-formatted datum sets, The File > Save State
> >> >> command will generate *.pvsm files that will let you "recreate" a
> >> >> previously
> >> >> constructed Browser Pipeline. (The PV *.pvsm reader gives you the
> >> >> opportunity to select a different datum set.)
> >> >>
> >> >> There is a small two-cell mesh file attached that might be helpful to
> >> >> you
> >> >> when constructing a VTK-formatted file writer in your application.
> >> >>
> >> >> --Sam
> >> >>
> >> >>
> >> >>
> >> >>
> >> >>
> >> >> On 1/27/2018 8:46 AM, Wyatt Spear wrote:
> >> >>
> >> >> Greetings,
> >> >>
> >> >> Currently I am using my own application to generate a simple CSV file
> >> >> which can be loaded up in ParaView. I then create the visualization I
> >> >> want
> >> >> with a few manual filter operations.
> >> >>
> >> >> What I would like is to generate a file, preferably still with a
> field
> >> >> for
> >> >> CSV-like raw data, that tells ParaView to load the data and then
> apply
> >> >> the
> >> >> filters I want, so the view I want is immediately available upon
> >> >> loading the
> >> >> file and the raw data is available if I want to try other filters.
> >> >>
> >> >> I've taken a look at vpt and pvd files saved from my intended view
> but
> >> >> I'm
> >> >> not seeing much correspondence between the CSV data I generate, the
> >> >> filters
> >> >> I apply and the data fields in there. I'm also pondering the
> save-state
> >> >> and
> >> >> trace/macro features of ParaView but I suspect those won't quite
> square
> >> >> with
> >> >> my aim of generating a file in an external application which includes
> >> >> data.
> >> >>
> >> >> Could someone point me toward a proper way to do this? If it comes
> down
> >> >> to
> >> >> plugin development I'm willing to take a look at that.
> >> >>
> >> >> Thanks,
> >> >> Wyatt Spear
> >> >>
> >> >>
> >> >> _______________________________________________
> >> >> 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
> >> >>
> >> >> Search the list archives at: http://markmail.org/search/?q=ParaView
> >> >>
> >> >> Follow this link to subscribe/unsubscribe:
> >> >> https://paraview.org/mailman/listinfo/paraview
> >> >>
> >> >>
> >> >> _______________________________________________
> >> >> 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
> >> >>
> >> >> Search the list archives at: http://markmail.org/search/?q=ParaView
> >> >>
> >> >> Follow this link to subscribe/unsubscribe:
> >> >> https://paraview.org/mailman/listinfo/paraview
> >> >
> >> >
> >> > _______________________________________________
> >> > 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
> >> >
> >> > Search the list archives at: http://markmail.org/search/?q=ParaView
> >> >
> >> > Follow this link to subscribe/unsubscribe:
> >> > https://paraview.org/mailman/listinfo/paraview
> >> >
> >>
> >>
> >>
> >> --
> >> Cory Quammen
> >> Staff R&D Engineer
> >> Kitware, Inc.
> >>
> >
>
>
>
> --
> Cory Quammen
> Staff R&D Engineer
> Kitware, Inc.
>
>
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