Simple n-body simulation written entirely in C. Uses periodic boundary conditions and a tempered version of Newton's law of gravity to limit extra close encounters. Python 3.6+ required to plot properly.
To build library:
make
To build simulation executable:
cd sims
make
To run the example simulation:
./sims/sim.exe sim.config
The sim.config parameters are:
fn -> filename
n_thread -> number of threads for parallelization
niter -> number of iterations
nb -> number of bodies
td -> timestep in sec
mass_low -> lower bound on masses of bodies
mass_up -> upper bound on masses of bodies
vel_low -> lower bound on each component of velocity
vel_up -> upper bound on each component of velocity
cubelen -> simulation cube size in AU
The default config parameters should produce a nice animation.
The masses and velocities are distributed in a uniform distribution between the upper and lower bounds.
To plot an animation:
./scripts/plot.py ./sims/out.txt