Building Exodus

A Makefile is provided to ease to process of building Exodus. Just run:

make exodus

and it will be downloaded to ./seacas/ and built. You will need CMake 3.10+, gcc and g++.

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It may take up to 45 minutes for Exodus to compile, depending on network speeds and machine specs.

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For issues with compiling Exodus or running this makefile, contact Daniel Livingston at livingston@lanl.gov.

Configuring the Python examples

Python scripts are included in the py-lib directory. These are used to create 3D Exodus meshes.

These scripts were written by Ethan Coon as part of the Amanzi/ATS project and can originally be found here.

Configuring python-exodus

This script uses the Exodus Python library to make calls to the compiled C library.

To get Python to find the exodus-python package, either append the SEACAS library path to your PYTHONPATH:

export PYTHONPATH=$PYTHONPATH:$(pwd)/seacas/lib

Or set the SEACAS_DIR environment variable:

export SEACAS_DIR=$(pwd)/seacas

Also, export the environment variable ACCESS, which Exodus uses internally:

export ACCESS=$(pwd)/seacas

Running the Python examples

Reference meshes for the two examples can be found in the output/ directory.

Four Polygon Test

cd four-polygon-test
python2.7 ../py-lib/meshing_ats.py -n 10 -d 1 ./four_polygon.vtk

This will read in the 2D mesh four_polygon.vtk and extrude and write to four_polygon.exo.

Basic Example

cd py-lib
python2.7 basic_ats_example.py

This will use Numpy to generate a simple mesh in meshing_ats_example.exo.

Visualizing Exodus files

ParaView or VisIT can be used to view the Exodus files.