Function pathTween

chapter24/docs/d3-graphviz.js:373–384

(points, d1)

  }

  function pathTween(points, d1) {
    return function () {
      var pointInterpolators = points.map(function (p) {
        return d3Interpolate.interpolate([p[0][0], p[0][1]], [p[1][0], p[1][1]]);
      });
      return function (t) {
        return t < 1 ? "M" + pointInterpolators.map(function (p) {
          return p(t);
        }).join("L") : d1;
      };
    };
  }
  function pathTweenPoints(node, d1, precision, precisionIsRelative) {
    var path0 = node;
    var path1 = path0.cloneNode();