physics

// these are all options in full.
var options = {
  physics:{
    enabled: true,
    barnesHut: {
      gravitationalConstant: -2000,
      centralGravity: 0.3,
      springLength: 95,
      springConstant: 0.04,
      damping: 0.09,
      avoidOverlap: 0
    },
    forceAtlas2Based: {
      gravitationalConstant: -50,
      centralGravity: 0.01,
      springConstant: 0.08,
      springLength: 100,
      damping: 0.4,
      avoidOverlap: 0
    },
    repulsion: {
      centralGravity: 0.2,
      springLength: 200,
      springConstant: 0.05,
      nodeDistance: 100,
      damping: 0.09
    },
    hierarchicalRepulsion: {
      centralGravity: 0.0,
      springLength: 100,
      springConstant: 0.01,
      nodeDistance: 120,
      damping: 0.09
    },
    maxVelocity: 50,
    minVelocity: 0.1,
    solver: 'barnesHut',
    stabilization: {
      enabled: true,
      iterations: 1000,
      updateInterval: 100,
      onlyDynamicEdges: false,
      fit: true
    },
    timestep: 0.5,
    adaptiveTimestep: true
  }
}

network.setOptions(options);