This code is composed of multiple files:

• poisson.cc contains the main function and the size of the problem

• simulation.cc contains the poisson solver "compute_step" does the update of the grid for one step "compute" does the loop with step computation and the swaping of the grids

• grid.cc contains a simple 2d grid stored in a 1d array

• dumpers.cc contains 2 implementations of a dumper, one generates ascii files (pgm) the other one writes binary files (bmp)

• double_buffer.cc contains a simple tool to swap two grids