LaGriT Release Notes

This page describes version updates for V3.2 and newer. See other pages for older versions.

LaGriT V3.3 October 2017

  • Major changes to comply with ExodusII 7, changed arrays to 8 byte integers instead of 4
  • dump/exo no longer writes empty attrib arrays to the ExodusII file
  • all test directories with ExodusII files updated to new output
  • all test directories using rmpoint and filter commands updated to new output
  • lagrit.lanl.gov removed from this repo, use docs/pages instead

LaGriT V3.203 July 2017

  • Major upgrade to LaGriT build and test scripts.
  • Added install.h and improved documentation for building LaGriT on Linux and Mac machines.
  • Update ExodusII to 7.01 using git clone https://github.com/gsjaardema/seacas.git
  • Removed exodus include files from src directory and use install.sh instead
  • Convert lagrit.lanl.gov to github Markdown pages at https://lanl.github.io/LaGriT

These issues were fixed:

  • segmentation fault during triangulate
  • massage command failing to de-refine and no error is reported
  • ExodusII output for 2D Planar incorrectly written as 3 Dimensions
  • second call to addmesh/excavate command causing memory error or segmentation fault
  • output adjusted to make room for large numbers when reporting dudded nodes from filter command

Added to Test Suite:

  • level01/createpts_filter illustrates the difference between filter and the more accurate filterkd commands
  • level01/smooth_massage use massage with smooth to refine and de-refine a triangulation
  • level01/write_exo write 3D and 2D Exodus files with psets, eltsets, and facesets
  • level01/pflotran_stor write pflotran style Voronoi geometric coefficient (volume, face area) files

PyLaGriT new features:

  • read_sheetij creates a quad mesh from an elevation file reading Z(i,j) into mesh zic attribute
  • read_modflow creates a modflow rectilinear mesh using modflow files using elev_top.mod and init_bnds.inf
  • read_fehm read FEHM format mesh file with geometry and connectivity (LaGriT does not have this option)
  • examples/arctic_w_ice_wedges example Mesh for 2D polygon with ice wedges by Chuck Abolt
  • examples/julia Example of using PyLaGriT within a Julia script. Requires that the Julia package PyCall is installed.

Known Issues:

  • Builds with compiler gfortran v5 or greater can generate run-time signal exceptions such as IEEE_DNORMAL. Most exceptions have been tracked down and fixed according to picky compiler suggestions. These exceptions have not changed the behavior of the code. Exceptions will continue to be fixed as they show up.

  • During testing it was found that the filter command may find and remove fewer nodes than the command filterkd. The command filterkd is recommended where precision might be an issue. Documentation will be changed to reflect this. It is expected that the filter command and algorithm will be deprecated and replaced by filterkd. See test/level01/createpts_filter

  • Paraview has trouble displaying ExodusII facesets for 2D grids in 3 Dimensions, but is fine with 2D planar where Z values are ignored. When viewing these same ExodusII files with GMV, the facesets look correct. Checking files by converting to ASCII with ncdump, the files look correct. We do not know if this is a LaGriT, ExodusII, or Paraview issue. See test/level01/write_exo for ExodusII example files.

LaGriT V3.200 September 2016

LaGriT V3 LACC-15-069 is now distributed as open-source software under a BSD 3-Clause License.

This version moves the entire LaGriT repo from a local mercurial version control to public github and now includes the python driven version PyLaGriT. For most current versions of source and documentation use the open-source repository at https://github.com/lanl/LaGriT

Compiled executable versions of LaGriT will continue to available through https://lagrit.lanl.gov/licensing.md

See code and issues at https://github.com/lanl/LaGriT