Example of basic use of library libmmg3d for a lagrangian motion test case

I/ Implementation

We read the mesh and displacement in files and then, we compute the volume displacement.

II/ Compilation

1. Prerequisite: you must have build and install the SUscElas library (https://github.com/SUscTools/SUscElas)

1. Build and install the mmg3d shared and/or static library with the USE_SUSCELAS CMake's flag set to ON. We suppose in the following that you have installed the mmg3d library in the **_$CMAKE_INSTALL_PREFIX_** directory (see the installation section of the setup guide);
2. compile the main.c file specifying:
   • the mmg3d include directory with the -I option;
   • the mmg3d library location with the -L option;
   • the mmg3d library name with the -l option;
   • for the static library you must also link the executable with the Elas library, the math library and, if used for the mmg3d library compilation, the scotch and scotcherr libraries;
   • with the shared library, you must add the ***_$CMAKE_INSTALL_PREFIX_** directory to your LD_LIBRARY_PATH.

‍Example 1
Command line to link the application with the mmg3d static library (we supposed here that the scotch library is installed in the **_$SCOTCH_PATH_** directory):

gcc -I$CMAKE_INSTALL_PREFIX/include/mmg/mmg3d main.c -L$CMAKE_INSTALL_PREFIX/lib -L$SCOTCH_PATH -L$SUSCELAS_PATH -lmmg3d -lElas -lscotch -lscotcherr -lm

‍Example 2
Command line to link the application with the mmg3d shared library:

gcc -I$CMAKE_INSTALL_PREFIX/include/mmg/mmg3d main.c -L$CMAKE_INSTALL_PREFIX/lib -lmmg3d
export LD_LIBRARY_PATH=$CMAKE_INSTALL_PREFIX/lib:$LD_LIBRARY_PATH