Basic use of the mmg library for an adaptation testcase

I/ Implementation

To call the mmg library, you must:

1. build mesh and sol at MMG2D, MMG3D or MMGS format;
2. call the MMG2D, MMGS or MMG3D library;
3. get the final mesh and sol.

We read mesh and solution files using the MMG<2D/S/3D>_loadMesh and MMG<2D/S/3D>_loadSol functions. Results are saved using MMG<2D/S/3D>_saveMesh and MMG<2D/S/3D>_saveSol functions.

II/ Compilation

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

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

gcc -I$CMAKE_INSTALL_PREFIX/include/mmg/ main.c -L$CMAKE_INSTALL_PREFIX/lib -L$SCOTCH_PATH -lmmg -lscotch -lscotcherr -lm

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

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