[Paraview] Help on SPHVolumeInterpolator

[Ellinger, Carola]

Hi Jean, and Will,

Thanks for the help! I think I might just wait until that patch is released. It sounds like that is not too far into the future, so that's the easiest way for me to go. :)

Cheers, Carola


From: Will Schroeder <will.schroeder at kitware.com<mailto:will.schroeder at kitware.com>>
Date: Thursday, March 16, 2017 at 05:37
To: Favre Jean <jfavre at cscs.ch<mailto:jfavre at cscs.ch>>
Cc: Carola Ellinger <cellinger at lanl.gov<mailto:cellinger at lanl.gov>>, "paraview at paraview.org<mailto:paraview at paraview.org>" <paraview at paraview.org<mailto:paraview at paraview.org>>
Subject: Re: [Paraview] Help on SPHVolumeInterpolator

Carola-

What Jean said :-) The patch is waiting on me and I am waiting on deadlines which will be clearing up shortly.

If you haven't seen these yet, it's worth reviewing these articles:
https://blog.kitware.com/point-and-smoothed-particle-hydrodynamics-sph-interpolation-in-vtk/
https://blog.kitware.com/point-and-smoothed-particle-hydrodynamics-sph-interpolation-in-paraview/

Best,
W

On Wed, Mar 15, 2017 at 4:21 PM, Favre Jean <jfavre at cscs.ch<mailto:jfavre at cscs.ch>> wrote:
Carola

the answer is "soon". ParaView's GUI already enables the setting of the so-called Cuttoff Array. In the GUI (I am assuming you use version 5.3), there should be a setting for the Density and the Mass arrays. And just below it, is the 3rd setting for the "smooting length" array. Unfortunately, we are waiting on a patch to the underlying VTK class vtkSPHInterpolator.cxx which currently has a small error preventing the correct setting.

By the way, I strongly suggest that you use a version of ParaView compiled with OpenMP, or TBB. You will see great speed-ups on a multi-core node, since the Point Interpolators (Line, Plane, Volume) are all parallelized on-the-node.

Until the patch is merged into VTK, and ParaView picks up the change, you will be limited to setting the Density and Mass arrays. (Unless you compile your own ParaView, and I can tell you how to edit the source code to enable the smoothing array.)

-----------------
Jean/CSCS
________________________________
From: ParaView [paraview-bounces at paraview.org<mailto:paraview-bounces at paraview.org>] on behalf of Ellinger, Carola [cellinger at lanl.gov<mailto:cellinger at lanl.gov>]
Sent: Wednesday, March 15, 2017 6:47 PM
To: paraview at paraview.org<mailto:paraview at paraview.org>
Subject: [Paraview] Help on SPHVolumeInterpolator

Hello,

I have astrophysical SPH (smoothed particle hydrodynamics) data that I want to interpolate for visualization in ParaView. I've found the SPHVolumeInterpolator filter to do that, but can this filter handle non-constant smoothing lengths of SPH particles for the interpolation? If so, how is this set? Due to the nature of the object I'm trying to visualize (a star), the smoothing lengths varies over a few orders of magnitude.

Thank you for any help,

Carola


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