/**
 * Initialize the hybrid layout algorithm and start simulation.
 */
function startHybridSimulation() {
  console.log("startHybridSimulation");
  springForce = false;
  d3.selectAll(".nodes").remove();
  simulation.stop();
  p1 = performance.now();

  configuration = {
    iteration: ITERATIONS,
    neighbourSize: NEIGHBOUR_SIZE,
    sampleSize: SAMPLE_SIZE,
    distanceRange: SELECTED_DISTANCE * MULTIPLIER,
    fullIterations: FULL_ITERATIONS,
    fullNeighbourSize: FULL_NEIGHBOUR_SIZE,
    fullSampleSize: FULL_SAMPLE_SIZE,
    fullDistanceRange: FULL_SELECTED_DISTANCE * MULTIPLIER,
    distanceFn: function (s, t) {return distanceFunction(s, t, props, norm) * MULTIPLIER;},
    pivots: PIVOTS,
    numPivots: NUM_PIVOTS
  };
  console.log(configuration);
  hybridSimulation = d3.hybridSimulation(nodes, configuration);

  let sample = hybridSimulation.sample();
  let remainder = hybridSimulation.remainder();

  addNodesToDOM(sample);

  hybridSimulation
    .on("sampleTick", ticked)
    .on("fullTick", ticked)
    .on("startFull", startedFull)
    .on("end", ended);

  function startedFull() {
    console.log("startedFull");
    d3.selectAll(".nodes").remove();
    addNodesToDOM(nodes);
  }
}