Function forceLayout

_benchmarks/sample_echarts.js:56916–57064

(inNodes, inEdges, opts)

    // }

    function forceLayout(inNodes, inEdges, opts) {
      var nodes = inNodes;
      var edges = inEdges;
      var rect = opts.rect;
      var width = rect.width;
      var height = rect.height;
      var center = [rect.x + width / 2, rect.y + height / 2]; // let scale = opts.scale || 1;

      var gravity = opts.gravity == null ? 0.1 : opts.gravity; // for (let i = 0; i < edges.length; i++) {
      //     let e = edges[i];
      //     let n1 = e.n1;
      //     let n2 = e.n2;
      //     n1.edges = n1.edges || [];
      //     n2.edges = n2.edges || [];
      //     n1.edges.push(e);
      //     n2.edges.push(e);
      // }
      // Init position

      for (var i = 0; i < nodes.length; i++) {
        var n = nodes[i];

        if (!n.p) {
          n.p = create(width * (Math.random() - 0.5) + center[0], height * (Math.random() - 0.5) + center[1]);
        }

        n.pp = clone$1(n.p);
        n.edges = null;
      } // Formula in 'Graph Drawing by Force-directed Placement'
      // let k = scale * Math.sqrt(width * height / nodes.length);
      // let k2 = k * k;


      var initialFriction = opts.friction == null ? 0.6 : opts.friction;
      var friction = initialFriction;
      var beforeStepCallback;
      var afterStepCallback;
      return {
        warmUp: function () {
          friction = initialFriction * 0.8;
        },
        setFixed: function (idx) {
          nodes[idx].fixed = true;
        },
        setUnfixed: function (idx) {
          nodes[idx].fixed = false;
        },

        /**
         * Before step hook
         */
        beforeStep: function (cb) {
          beforeStepCallback = cb;
        },

        /**
         * After step hook
         */