Move example JS files

examples/js/algos/linkForce.js

@@ -0,0 +1,59 @@
+/**
+ * Initialize the link force algorithm and start simulation.
+ */
+function startLinkSimulation() {
+  console.log("startLinkSimulation")
+  springForce = false;
+  alreadyRanIterations = 0;
+  manualStop = true;
+  simulation.stop();
+  p1 = performance.now();
+  let links = [], force;
+
+  if (tweakedVerOfLink) {
+    force = d3.forceLinkFullyConnected()
+              .distance(function (n, m) {
+                return distanceFunction(n, m, props, norm);
+              })
+              .stableVelocity(0) //TODO
+              .onStableVelo(ended);
+  }
+  else {
+    for (i = nodes.length-1; i >= 1; i--) {
+      for (j = i-1; j >= 0; j--) {
+        links.push({
+          source: nodes[i],
+          target: nodes[j],
+        });
+      }
+    }
+    force = d3.forceLink()
+              .distance(function (n) {
+               return distanceFunction(n.source, n.target, props, norm);
+              })
+             .links(links);
+  }
+
+  /* Add force
+   * Please add the distance function, links, and set simulation nodes
+   *   before feeding the force to the simulation.
+   *
+   * On setting the distance fn or being initialized by the simulation, the
+   *   force will pre-calculate high-dimensional distances of every link and
+   *   store that as cache.
+   * Adding distance fn and links before being initialize by the simulation
+   *    means that the first pre-calculation will calculate noting as there was
+   *    no nodes list.
+   * The full pre-calculation will then occur once when the force is being
+   *   initialized by the simulation where nodes list is given.
+   */
+
+  simulation
+    .alphaDecay(0)
+    .alpha(1)
+    .on("tick", ticked)
+    .on("end", ended)
+    //.velocityDecay(0.8)
+    .force(forceName,force)
+    .restart();
+}