Here is a list of all documented files with brief descriptions:

eos.h	This header file contains classes for the calculation of the Equation of State (EOS)
geometry.h	This header file contains classes for the initialization of the geometry of fluid objects
geometry_1d.h	This header file contains classes for the initialization of 1d fluid objects
geometry_collision.h	This header file contains classes for the initialization of the geometry of fluid objects in the collision simulation
hexagonal_packing.h	This header file contains classes for creating particles based on the 2D and 3D hexagonal close packing
initializer.h	This header file contains classes for the initialization of the simulation
lp_solver.h	This header file contains classes of the main Lagrangian Particle solvers such as the hyperbolic solvers and the elliptic solvers
ls_solver.h	This header file contains classes for solvers of the least squares problem Ax = b
neighbour_searcher.h	This header file contains classes for searching nearest neighbours of particles using different algorithms such as octrees
octree.h	This header file contains classes for the Octree data structure and nearest neighbour search algorithms
particle_data.h	This header file contains classes for storing information and data of particles, such as x, y, and z coordinates, neighbour lists, and bounding boxes
particle_viewer.h	This header file contains classes for output simulation results in various formats such as .vtk and .txt
registrar.h	This header file contains template registrar classes for the Geometry and State family
state.h	This header file contains classes for the initialization of the state of fluid objects
state_1d.h	This header file contains classes for the initialization of the state of 1D fluid objects
state_collision.h	This header file contains classes for the initialization of the state of fluid objects in the 2D collision simulation
time_controller.h	This header file contains classes for simulation time controls