center_force            Center all particles around the origin without
                        affecting velocity
collision_force         Models particles as circles with a given radius
                        and pushes overlapping particles apart
dominator_constraint    Restrict child position based on parent
                        position
evolve                  Move the simulation forward one or more steps
field_force             Apply a vector field to particles
genesis                 Particle initialisation
impose                  Assign a force or constraint to a simulation
infinity_constraint     Reposition particles outside a canvas so they
                        wrap around
link_force              Attract or repel linked particles
manybody_force          Model attraction or repulsion between all
                        particles in the system
map_force               Apply a map to particles
mean_force              Apply the mean velocity of all the neighbors to
                        a particle
path_constraint         Limit particle position to be along a path or
                        outline
polygon_constraint      Fixes particles to be inside a polygon
random_force            Modify the velocity randomly at each step
reset_force             Reset the velocity verlet of particles to a
                        fixed value
simulate                Start a simulation based on a graph
simulation_modification
                        Modify the particles in a simulation
trap_force              Attract and trap particles within polygons
velocity_constraint     Limits particles to a specific velocity range
x_constraint            Fixes particles to a horizontal position
x_force                 Attract particles towards a horizontal position
y_constraint            Fixes particles to a vertical position
y_force                 Attract particles towards a vertical position
