how elastic the MASHers appear to one another.
how strongly MASHers tend to follow each other.
how random their motion is (without collisions)
how fast red MASHers want to move.
sets the timescale to reach the desired speed.
the physical system size.
the integration timestep.
how many integration timesteps to skip between redraw.
how many participants are red MASHers.
sets the scale for the force colors (must check 'Show forces').
enforces periodic boundary conditions on each axis.
whether or not to show the forces on each particle.
when restarted, whether to begin with a circle of active MASHers.
whether to calculate and display graphs at the bottom.