alpha Simulation activity
center Shifts the view, so the graph is centered at this location.
chargeEnabled charge Attracts (+) or repels (-) nodes to/from each other.
collideEnabled collide Prevents nodes from overlapping
forceXEnabled forceX Acts like gravity. Pulls all points towards an X location.
forceYEnabled forceY Acts like gravity. Pulls all points towards a Y location.
linkEnabled link Sets link length