documentation on Mesh Quality filter

Rigel · February 14, 2023, 12:42pm

Hi,

The ParaView documentation about the Mesh Quality filter (5. Filtering Data — ParaView Documentation 5.11.0 documentation) currently does not explain the meaning of all quality measurements that can be displayed. For example, for HexQualityMeasure, what is distortion and stretch?

Thanks a lot,

spyridon97 · February 15, 2023, 3:33pm

This is the code that is used by the mesh quality filter.

github.com

Kitware/VTK/blob/master/Filters/Verdict/vtkMeshQuality.h

/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkMeshQuality.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

  Copyright 2003-2008 Sandia Corporation.
  Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
  license for use of this work by or on behalf of the
  U.S. Government. Redistribution and use in source and binary forms, with
  or without modification, are permitted provided that this Notice and any
  statement of authorship are reproduced on all copies.

This file has been truncated. show original

I hope it helps

mechanicsguy · November 20, 2024, 7:03pm

I can’t seem to figure out from this code what the filter actually does. For example: when I set ‘area’ for ‘triangle quality measure’ and then go to coloring section of property browser I get ‘area’ vector with 5 components. Why does area have 5 components? what do each components mean?

Is there a specific documentation for this filter anywhere which tells what each selection does?

I am working with a mesh and need to find a way to get the radius of its circumcircle by selecting the face id.

dcthomp · November 20, 2024, 7:23pm

The Verdict library has a manual:

https://public.kitware.com/Wiki/images/6/6b/VerdictManual-revA.pdf

but Verdict does not provide circumcircle radius (or diameter) as a quality metric as that is not generally indicative of the quality of the element. Verdict does calculate the circumradius in the course of computing other quality metrics (such as the radius ratio), so you could look at the source code to see how that quantity is computed. But if you want the circumradius as cell data, you’ll need to write your own filter; VTK and ParaView do not provide one.