thunderegg

ThunderEgg is an object-oriented C++ library designed for flexibility and to allow users to implement parallel multigrid preconditioners for various problems on octree and quadtree adaptive meshes.

Members of the team

• Scott Aiton
• Donna Calhoun
• Grady Wright

Required Software

• MPI
• CMake

Optional Software

• FFTW - FFTW PatchSolver
• BLAS and LAPACK - DFT PatchSolver
• PETSc - ThunderEgg provides a set of interfaces to use PETSc Krylov Solvers and PETSc matrices.
• p4est - for compatibility with the p4est quadtree library

Compiling

Configure CMake project:

cmake -S /path/to/source -B build

Compilers can be specified in the following way

cmake -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -S /path/to/source -B build

Then compile:

cmake --build build

Some helpful CMake variables for configuration:

Variable	Default Value	Description
PETSC_DIR		The PETSc directory
PETSC_ARCH		The PETSc arch
petsc	ON	allow the use the use of PETSc
petsc_required	OFF	fail if PETSc is not found
FFTW_ROOT		The fftw directory
fftw	ON	allow the use the use of FFTW
fftw_required	OFF	fail if FFTW is not found
P4EST_ROOT		The p4est directory
p4est	ON	allow the use the use of p4est
p4est_required	OFF	fail if p4est is not found
lapack	ON	allow the use the use of lapack/blas
lapack_required	OFF	fail if lapack/blas is not found