Difference between revisions of "Template:Toronto/js/vendor min js"

Latest revision as of 20:55, 30 October 2017

// https://d3js.org Version 4.11.0. Copyright 2017 Mike Bostock. (function (global, factory) { typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : typeof define === 'function' && define.amd ? define(['exports'], factory) : (factory((global.d3 = global.d3 || {}))); }(this, (function (exports) { 'use strict';

var version = "4.11.0";

var ascending = function(a, b) {

 return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;

};

var bisector = function(compare) {

 if (compare.length === 1) compare = ascendingComparator(compare);
 return {
   left: function(a, x, lo, hi) {
     if (lo == null) lo = 0;
     if (hi == null) hi = a.length;
     while (lo < hi) {
       var mid = lo + hi >>> 1;
       if (compare(a[mid], x) < 0) lo = mid + 1;
       else hi = mid;
     }
     return lo;
   },
   right: function(a, x, lo, hi) {
     if (lo == null) lo = 0;
     if (hi == null) hi = a.length;
     while (lo < hi) {
       var mid = lo + hi >>> 1;
       if (compare(a[mid], x) > 0) hi = mid;
       else lo = mid + 1;
     }
     return lo;
   }
 };

};

function ascendingComparator(f) {

 return function(d, x) {
   return ascending(f(d), x);
 };

}

var ascendingBisect = bisector(ascending); var bisectRight = ascendingBisect.right; var bisectLeft = ascendingBisect.left;

var pairs = function(array, f) {

 if (f == null) f = pair;
 var i = 0, n = array.length - 1, p = array[0], pairs = new Array(n < 0 ? 0 : n);
 while (i < n) pairs[i] = f(p, p = array[++i]);
 return pairs;

};

function pair(a, b) {

 return [a, b];

}

var cross = function(values0, values1, reduce) {

 var n0 = values0.length,
     n1 = values1.length,
     values = new Array(n0 * n1),
     i0,
     i1,
     i,
     value0;

 if (reduce == null) reduce = pair;

 for (i0 = i = 0; i0 < n0; ++i0) {
   for (value0 = values0[i0], i1 = 0; i1 < n1; ++i1, ++i) {
     values[i] = reduce(value0, values1[i1]);
   }
 }

 return values;

};

var descending = function(a, b) {

 return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;

};

var number = function(x) {

 return x === null ? NaN : +x;

};

var variance = function(values, valueof) {

 var n = values.length,
     m = 0,
     i = -1,
     mean = 0,
     value,
     delta,
     sum = 0;

 if (valueof == null) {
   while (++i < n) {
     if (!isNaN(value = number(values[i]))) {
       delta = value - mean;
       mean += delta / ++m;
       sum += delta * (value - mean);
     }
   }
 }

 else {
   while (++i < n) {
     if (!isNaN(value = number(valueof(values[i], i, values)))) {
       delta = value - mean;
       mean += delta / ++m;
       sum += delta * (value - mean);
     }
   }
 }

 if (m > 1) return sum / (m - 1);

};

var deviation = function(array, f) {

 var v = variance(array, f);
 return v ? Math.sqrt(v) : v;

};

var extent = function(values, valueof) {

 var n = values.length,
     i = -1,
     value,
     min,
     max;

 if (valueof == null) {
   while (++i < n) { // Find the first comparable value.
     if ((value = values[i]) != null && value >= value) {
       min = max = value;
       while (++i < n) { // Compare the remaining values.
         if ((value = values[i]) != null) {
           if (min > value) min = value;
           if (max < value) max = value;
         }
       }
     }
   }
 }

 else {
   while (++i < n) { // Find the first comparable value.
     if ((value = valueof(values[i], i, values)) != null && value >= value) {
       min = max = value;
       while (++i < n) { // Compare the remaining values.
         if ((value = valueof(values[i], i, values)) != null) {
           if (min > value) min = value;
           if (max < value) max = value;
         }
       }
     }
   }
 }

 return [min, max];

};

var array = Array.prototype;

var slice = array.slice; var map = array.map;

var constant = function(x) {

 return function() {
   return x;
 };

};

var identity = function(x) {

 return x;

};

var sequence = function(start, stop, step) {

 start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;

 var i = -1,
     n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
     range = new Array(n);

 while (++i < n) {
   range[i] = start + i * step;
 }

 return range;

};

var e10 = Math.sqrt(50); var e5 = Math.sqrt(10); var e2 = Math.sqrt(2);

var ticks = function(start, stop, count) {

 var reverse,
     i = -1,
     n,
     ticks,
     step;

 stop = +stop, start = +start, count = +count;
 if (start === stop && count > 0) return [start];
 if (reverse = stop < start) n = start, start = stop, stop = n;
 if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];

 if (step > 0) {
   start = Math.ceil(start / step);
   stop = Math.floor(stop / step);
   ticks = new Array(n = Math.ceil(stop - start + 1));
   while (++i < n) ticks[i] = (start + i) * step;
 } else {
   start = Math.floor(start * step);
   stop = Math.ceil(stop * step);
   ticks = new Array(n = Math.ceil(start - stop + 1));
   while (++i < n) ticks[i] = (start - i) / step;
 }

 if (reverse) ticks.reverse();

 return ticks;

};

function tickIncrement(start, stop, count) {

 var step = (stop - start) / Math.max(0, count),
     power = Math.floor(Math.log(step) / Math.LN10),
     error = step / Math.pow(10, power);
 return power >= 0
     ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power)
     : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);

}

function tickStep(start, stop, count) {

 var step0 = Math.abs(stop - start) / Math.max(0, count),
     step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
     error = step0 / step1;
 if (error >= e10) step1 *= 10;
 else if (error >= e5) step1 *= 5;
 else if (error >= e2) step1 *= 2;
 return stop < start ? -step1 : step1;

}

var sturges = function(values) {

 return Math.ceil(Math.log(values.length) / Math.LN2) + 1;

};

var histogram = function() {

 var value = identity,
     domain = extent,
     threshold = sturges;

 function histogram(data) {
   var i,
       n = data.length,
       x,
       values = new Array(n);

   for (i = 0; i < n; ++i) {
     values[i] = value(data[i], i, data);
   }

   var xz = domain(values),
       x0 = xz[0],
       x1 = xz[1],
       tz = threshold(values, x0, x1);

   // Convert number of thresholds into uniform thresholds.
   if (!Array.isArray(tz)) {
     tz = tickStep(x0, x1, tz);
     tz = sequence(Math.ceil(x0 / tz) * tz, Math.floor(x1 / tz) * tz, tz); // exclusive
   }

   // Remove any thresholds outside the domain.
   var m = tz.length;
   while (tz[0] <= x0) tz.shift(), --m;
   while (tz[m - 1] > x1) tz.pop(), --m;

   var bins = new Array(m + 1),
       bin;

   // Initialize bins.
   for (i = 0; i <= m; ++i) {
     bin = bins[i] = [];
     bin.x0 = i > 0 ? tz[i - 1] : x0;
     bin.x1 = i < m ? tz[i] : x1;
   }

   // Assign data to bins by value, ignoring any outside the domain.
   for (i = 0; i < n; ++i) {
     x = values[i];
     if (x0 <= x && x <= x1) {
       bins[bisectRight(tz, x, 0, m)].push(data[i]);
     }
   }

   return bins;
 }

 histogram.value = function(_) {
   return arguments.length ? (value = typeof _ === "function" ? _ : constant(_), histogram) : value;
 };

 histogram.domain = function(_) {
   return arguments.length ? (domain = typeof _ === "function" ? _ : constant([_[0], _[1]]), histogram) : domain;
 };

 histogram.thresholds = function(_) {
   return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant(slice.call(_)) : constant(_), histogram) : threshold;
 };

 return histogram;

};

var threshold = function(values, p, valueof) {

 if (valueof == null) valueof = number;
 if (!(n = values.length)) return;
 if ((p = +p) <= 0 || n < 2) return +valueof(values[0], 0, values);
 if (p >= 1) return +valueof(values[n - 1], n - 1, values);
 var n,
     i = (n - 1) * p,
     i0 = Math.floor(i),
     value0 = +valueof(values[i0], i0, values),
     value1 = +valueof(values[i0 + 1], i0 + 1, values);
 return value0 + (value1 - value0) * (i - i0);

};

var freedmanDiaconis = function(values, min, max) {

 values = map.call(values, number).sort(ascending);
 return Math.ceil((max - min) / (2 * (threshold(values, 0.75) - threshold(values, 0.25)) * Math.pow(values.length, -1 / 3)));

};

var scott = function(values, min, max) {

 return Math.ceil((max - min) / (3.5 * deviation(values) * Math.pow(values.length, -1 / 3)));

};

var max = function(values, valueof) {

 var n = values.length,
     i = -1,
     value,
     max;

 if (valueof == null) {
   while (++i < n) { // Find the first comparable value.
     if ((value = values[i]) != null && value >= value) {
       max = value;
       while (++i < n) { // Compare the remaining values.
         if ((value = values[i]) != null && value > max) {
           max = value;
         }
       }
     }
   }
 }

 else {
   while (++i < n) { // Find the first comparable value.
     if ((value = valueof(values[i], i, values)) != null && value >= value) {
       max = value;
       while (++i < n) { // Compare the remaining values.
         if ((value = valueof(values[i], i, values)) != null && value > max) {
           max = value;
         }
       }
     }
   }
 }

 return max;

};

var mean = function(values, valueof) {

 var n = values.length,
     m = n,
     i = -1,
     value,
     sum = 0;

 if (valueof == null) {
   while (++i < n) {
     if (!isNaN(value = number(values[i]))) sum += value;
     else --m;
   }
 }

 else {
   while (++i < n) {
     if (!isNaN(value = number(valueof(values[i], i, values)))) sum += value;
     else --m;
   }
 }

 if (m) return sum / m;

};

var median = function(values, valueof) {

 var n = values.length,
     i = -1,
     value,
     numbers = [];

 if (valueof == null) {
   while (++i < n) {
     if (!isNaN(value = number(values[i]))) {
       numbers.push(value);
     }
   }
 }

 else {
   while (++i < n) {
     if (!isNaN(value = number(valueof(values[i], i, values)))) {
       numbers.push(value);
     }
   }
 }

 return threshold(numbers.sort(ascending), 0.5);

};

var merge = function(arrays) {

 var n = arrays.length,
     m,
     i = -1,
     j = 0,
     merged,
     array;

 while (++i < n) j += arrays[i].length;
 merged = new Array(j);

 while (--n >= 0) {
   array = arrays[n];
   m = array.length;
   while (--m >= 0) {
     merged[--j] = array[m];
   }
 }

 return merged;

};

var min = function(values, valueof) {

 var n = values.length,
     i = -1,
     value,
     min;

 if (valueof == null) {
   while (++i < n) { // Find the first comparable value.
     if ((value = values[i]) != null && value >= value) {
       min = value;
       while (++i < n) { // Compare the remaining values.
         if ((value = values[i]) != null && min > value) {
           min = value;
         }
       }
     }
   }
 }

 else {
   while (++i < n) { // Find the first comparable value.
     if ((value = valueof(values[i], i, values)) != null && value >= value) {
       min = value;
       while (++i < n) { // Compare the remaining values.
         if ((value = valueof(values[i], i, values)) != null && min > value) {
           min = value;
         }
       }
     }
   }
 }

 return min;

};

var permute = function(array, indexes) {

 var i = indexes.length, permutes = new Array(i);
 while (i--) permutes[i] = array[indexes[i]];
 return permutes;

};

var scan = function(values, compare) {

 if (!(n = values.length)) return;
 var n,
     i = 0,
     j = 0,
     xi,
     xj = values[j];

 if (compare == null) compare = ascending;

 while (++i < n) {
   if (compare(xi = values[i], xj) < 0 || compare(xj, xj) !== 0) {
     xj = xi, j = i;
   }
 }

 if (compare(xj, xj) === 0) return j;

};

var shuffle = function(array, i0, i1) {

 var m = (i1 == null ? array.length : i1) - (i0 = i0 == null ? 0 : +i0),
     t,
     i;

 while (m) {
   i = Math.random() * m-- | 0;
   t = array[m + i0];
   array[m + i0] = array[i + i0];
   array[i + i0] = t;
 }

 return array;

};

var sum = function(values, valueof) {

 var n = values.length,
     i = -1,
     value,
     sum = 0;

 if (valueof == null) {
   while (++i < n) {
     if (value = +values[i]) sum += value; // Note: zero and null are equivalent.
   }
 }

 else {
   while (++i < n) {
     if (value = +valueof(values[i], i, values)) sum += value;
   }
 }

 return sum;

};

var transpose = function(matrix) {

 if (!(n = matrix.length)) return [];
 for (var i = -1, m = min(matrix, length), transpose = new Array(m); ++i < m;) {
   for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n;) {
     row[j] = matrix[j][i];
   }
 }
 return transpose;

};

function length(d) {

 return d.length;

}

var zip = function() {

 return transpose(arguments);

};

var slice$1 = Array.prototype.slice;

var identity$1 = function(x) {

 return x;

};

var top = 1; var right = 2; var bottom = 3; var left = 4; var epsilon = 1e-6;

function translateX(x) {

 return "translate(" + (x + 0.5) + ",0)";

}

function translateY(y) {

 return "translate(0," + (y + 0.5) + ")";

}

function number$1(scale) {

 return function(d) {
   return +scale(d);
 };

}

function center(scale) {

 var offset = Math.max(0, scale.bandwidth() - 1) / 2; // Adjust for 0.5px offset.
 if (scale.round()) offset = Math.round(offset);
 return function(d) {
   return +scale(d) + offset;
 };

}

function entering() {

 return !this.__axis;

}

function axis(orient, scale) {

 var tickArguments = [],
     tickValues = null,
     tickFormat = null,
     tickSizeInner = 6,
     tickSizeOuter = 6,
     tickPadding = 3,
     k = orient === top || orient === left ? -1 : 1,
     x = orient === left || orient === right ? "x" : "y",
     transform = orient === top || orient === bottom ? translateX : translateY;

 function axis(context) {
   var values = tickValues == null ? (scale.ticks ? scale.ticks.apply(scale, tickArguments) : scale.domain()) : tickValues,
       format = tickFormat == null ? (scale.tickFormat ? scale.tickFormat.apply(scale, tickArguments) : identity$1) : tickFormat,
       spacing = Math.max(tickSizeInner, 0) + tickPadding,
       range = scale.range(),
       range0 = +range[0] + 0.5,
       range1 = +range[range.length - 1] + 0.5,
       position = (scale.bandwidth ? center : number$1)(scale.copy()),
       selection = context.selection ? context.selection() : context,
       path = selection.selectAll(".domain").data([null]),
       tick = selection.selectAll(".tick").data(values, scale).order(),
       tickExit = tick.exit(),
       tickEnter = tick.enter().append("g").attr("class", "tick"),
       line = tick.select("line"),
       text = tick.select("text");

   path = path.merge(path.enter().insert("path", ".tick")
       .attr("class", "domain")
       .attr("stroke", "#000"));

   tick = tick.merge(tickEnter);

   line = line.merge(tickEnter.append("line")
       .attr("stroke", "#000")
       .attr(x + "2", k * tickSizeInner));

   text = text.merge(tickEnter.append("text")
       .attr("fill", "#000")
       .attr(x, k * spacing)
       .attr("dy", orient === top ? "0em" : orient === bottom ? "0.71em" : "0.32em"));

   if (context !== selection) {
     path = path.transition(context);
     tick = tick.transition(context);
     line = line.transition(context);
     text = text.transition(context);

     tickExit = tickExit.transition(context)
         .attr("opacity", epsilon)
         .attr("transform", function(d) { return isFinite(d = position(d)) ? transform(d) : this.getAttribute("transform"); });

     tickEnter
         .attr("opacity", epsilon)
         .attr("transform", function(d) { var p = this.parentNode.__axis; return transform(p && isFinite(p = p(d)) ? p : position(d)); });
   }

   tickExit.remove();

   path
       .attr("d", orient === left || orient == right
           ? "M" + k * tickSizeOuter + "," + range0 + "H0.5V" + range1 + "H" + k * tickSizeOuter
           : "M" + range0 + "," + k * tickSizeOuter + "V0.5H" + range1 + "V" + k * tickSizeOuter);

   tick
       .attr("opacity", 1)
       .attr("transform", function(d) { return transform(position(d)); });

   line
       .attr(x + "2", k * tickSizeInner);

   text
       .attr(x, k * spacing)
       .text(format);

   selection.filter(entering)
       .attr("fill", "none")
       .attr("font-size", 10)
       .attr("font-family", "sans-serif")
       .attr("text-anchor", orient === right ? "start" : orient === left ? "end" : "middle");

   selection
       .each(function() { this.__axis = position; });
 }

 axis.scale = function(_) {
   return arguments.length ? (scale = _, axis) : scale;
 };

 axis.ticks = function() {
   return tickArguments = slice$1.call(arguments), axis;
 };

 axis.tickArguments = function(_) {
   return arguments.length ? (tickArguments = _ == null ? [] : slice$1.call(_), axis) : tickArguments.slice();
 };

 axis.tickValues = function(_) {
   return arguments.length ? (tickValues = _ == null ? null : slice$1.call(_), axis) : tickValues && tickValues.slice();
 };

 axis.tickFormat = function(_) {
   return arguments.length ? (tickFormat = _, axis) : tickFormat;
 };

 axis.tickSize = function(_) {
   return arguments.length ? (tickSizeInner = tickSizeOuter = +_, axis) : tickSizeInner;
 };

 axis.tickSizeInner = function(_) {
   return arguments.length ? (tickSizeInner = +_, axis) : tickSizeInner;
 };

 axis.tickSizeOuter = function(_) {
   return arguments.length ? (tickSizeOuter = +_, axis) : tickSizeOuter;
 };

 axis.tickPadding = function(_) {
   return arguments.length ? (tickPadding = +_, axis) : tickPadding;
 };

 return axis;

}

function axisTop(scale) {

 return axis(top, scale);

}

function axisRight(scale) {

 return axis(right, scale);

}

function axisBottom(scale) {

 return axis(bottom, scale);

}

function axisLeft(scale) {

 return axis(left, scale);

}

var noop = {value: function() {}};

function dispatch() {

 for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
   if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t);
   _[t] = [];
 }
 return new Dispatch(_);

}

function Dispatch(_) {

 this._ = _;

}

function parseTypenames(typenames, types) {

 return typenames.trim().split(/^|\s+/).map(function(t) {
   var name = "", i = t.indexOf(".");
   if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
   if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
   return {type: t, name: name};
 });

}

Dispatch.prototype = dispatch.prototype = {

 constructor: Dispatch,
 on: function(typename, callback) {
   var _ = this._,
       T = parseTypenames(typename + "", _),
       t,
       i = -1,
       n = T.length;

   // If no callback was specified, return the callback of the given type and name.
   if (arguments.length < 2) {
     while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;
     return;
   }

   // If a type was specified, set the callback for the given type and name.
   // Otherwise, if a null callback was specified, remove callbacks of the given name.
   if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
   while (++i < n) {
     if (t = (typename = T[i]).type) _[t] = set(_[t], typename.name, callback);
     else if (callback == null) for (t in _) _[t] = set(_[t], typename.name, null);
   }

   return this;
 },
 copy: function() {
   var copy = {}, _ = this._;
   for (var t in _) copy[t] = _[t].slice();
   return new Dispatch(copy);
 },
 call: function(type, that) {
   if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
   if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
   for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
 },
 apply: function(type, that, args) {
   if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
   for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
 }

};

function get(type, name) {

 for (var i = 0, n = type.length, c; i < n; ++i) {
   if ((c = type[i]).name === name) {
     return c.value;
   }
 }

}

function set(type, name, callback) {

 for (var i = 0, n = type.length; i < n; ++i) {
   if (type[i].name === name) {
     type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
     break;
   }
 }
 if (callback != null) type.push({name: name, value: callback});
 return type;

}

var xhtml = "http://www.w3.org/1999/xhtml";

var namespaces = {

 svg: "http://www.w3.org/2000/svg",
 xhtml: xhtml,
 xlink: "http://www.w3.org/1999/xlink",
 xml: "http://www.w3.org/XML/1998/namespace",
 xmlns: "http://www.w3.org/2000/xmlns/"

};

var namespace = function(name) {

 var prefix = name += "", i = prefix.indexOf(":");
 if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
 return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;

};

function creatorInherit(name) {

 return function() {
   var document = this.ownerDocument,
       uri = this.namespaceURI;
   return uri === xhtml && document.documentElement.namespaceURI === xhtml
       ? document.createElement(name)
       : document.createElementNS(uri, name);
 };

}

function creatorFixed(fullname) {

 return function() {
   return this.ownerDocument.createElementNS(fullname.space, fullname.local);
 };

}

var creator = function(name) {

 var fullname = namespace(name);
 return (fullname.local
     ? creatorFixed
     : creatorInherit)(fullname);

};

var nextId = 0;

function local$1() {

 return new Local;

}

function Local() {

 this._ = "@" + (++nextId).toString(36);

}

Local.prototype = local$1.prototype = {

 constructor: Local,
 get: function(node) {
   var id = this._;
   while (!(id in node)) if (!(node = node.parentNode)) return;
   return node[id];
 },
 set: function(node, value) {
   return node[this._] = value;
 },
 remove: function(node) {
   return this._ in node && delete node[this._];
 },
 toString: function() {
   return this._;
 }

};

var matcher = function(selector) {

 return function() {
   return this.matches(selector);
 };

};

if (typeof document !== "undefined") {

 var element = document.documentElement;
 if (!element.matches) {
   var vendorMatches = element.webkitMatchesSelector
       || element.msMatchesSelector
       || element.mozMatchesSelector
       || element.oMatchesSelector;
   matcher = function(selector) {
     return function() {
       return vendorMatches.call(this, selector);
     };
   };
 }

}

var matcher$1 = matcher;

var filterEvents = {};

exports.event = null;

if (typeof document !== "undefined") {

 var element$1 = document.documentElement;
 if (!("onmouseenter" in element$1)) {
   filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
 }

}

function filterContextListener(listener, index, group) {

 listener = contextListener(listener, index, group);
 return function(event) {
   var related = event.relatedTarget;
   if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
     listener.call(this, event);
   }
 };

}

function contextListener(listener, index, group) {

 return function(event1) {
   var event0 = exports.event; // Events can be reentrant (e.g., focus).
   exports.event = event1;
   try {
     listener.call(this, this.__data__, index, group);
   } finally {
     exports.event = event0;
   }
 };

}

function parseTypenames$1(typenames) {

 return typenames.trim().split(/^|\s+/).map(function(t) {
   var name = "", i = t.indexOf(".");
   if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
   return {type: t, name: name};
 });

}

function onRemove(typename) {

 return function() {
   var on = this.__on;
   if (!on) return;
   for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
     if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
       this.removeEventListener(o.type, o.listener, o.capture);
     } else {
       on[++i] = o;
     }
   }
   if (++i) on.length = i;
   else delete this.__on;
 };

}

function onAdd(typename, value, capture) {

 var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
 return function(d, i, group) {
   var on = this.__on, o, listener = wrap(value, i, group);
   if (on) for (var j = 0, m = on.length; j < m; ++j) {
     if ((o = on[j]).type === typename.type && o.name === typename.name) {
       this.removeEventListener(o.type, o.listener, o.capture);
       this.addEventListener(o.type, o.listener = listener, o.capture = capture);
       o.value = value;
       return;
     }
   }
   this.addEventListener(typename.type, listener, capture);
   o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
   if (!on) this.__on = [o];
   else on.push(o);
 };

}

var selection_on = function(typename, value, capture) {

 var typenames = parseTypenames$1(typename + ""), i, n = typenames.length, t;

 if (arguments.length < 2) {
   var on = this.node().__on;
   if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
     for (i = 0, o = on[j]; i < n; ++i) {
       if ((t = typenames[i]).type === o.type && t.name === o.name) {
         return o.value;
       }
     }
   }
   return;
 }

 on = value ? onAdd : onRemove;
 if (capture == null) capture = false;
 for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
 return this;

};

function customEvent(event1, listener, that, args) {

 var event0 = exports.event;
 event1.sourceEvent = exports.event;
 exports.event = event1;
 try {
   return listener.apply(that, args);
 } finally {
   exports.event = event0;
 }

}

var sourceEvent = function() {

 var current = exports.event, source;
 while (source = current.sourceEvent) current = source;
 return current;

};

var point = function(node, event) {

 var svg = node.ownerSVGElement || node;

 if (svg.createSVGPoint) {
   var point = svg.createSVGPoint();
   point.x = event.clientX, point.y = event.clientY;
   point = point.matrixTransform(node.getScreenCTM().inverse());
   return [point.x, point.y];
 }

 var rect = node.getBoundingClientRect();
 return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];

};

var mouse = function(node) {

 var event = sourceEvent();
 if (event.changedTouches) event = event.changedTouches[0];
 return point(node, event);

};

function none() {}

var selector = function(selector) {

 return selector == null ? none : function() {
   return this.querySelector(selector);
 };

};

var selection_select = function(select) {

 if (typeof select !== "function") select = selector(select);

 for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
   for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
     if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
       if ("__data__" in node) subnode.__data__ = node.__data__;
       subgroup[i] = subnode;
     }
   }
 }

 return new Selection(subgroups, this._parents);

};

function empty$1() {

 return [];

}

var selectorAll = function(selector) {

 return selector == null ? empty$1 : function() {
   return this.querySelectorAll(selector);
 };

};

var selection_selectAll = function(select) {

 if (typeof select !== "function") select = selectorAll(select);

 for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
   for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
     if (node = group[i]) {
       subgroups.push(select.call(node, node.__data__, i, group));
       parents.push(node);
     }
   }
 }

 return new Selection(subgroups, parents);

};

var selection_filter = function(match) {

 if (typeof match !== "function") match = matcher$1(match);

 for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
   for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
     if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
       subgroup.push(node);
     }
   }
 }

 return new Selection(subgroups, this._parents);

};

var sparse = function(update) {

 return new Array(update.length);

};

var selection_enter = function() {

 return new Selection(this._enter || this._groups.map(sparse), this._parents);

};

function EnterNode(parent, datum) {

 this.ownerDocument = parent.ownerDocument;
 this.namespaceURI = parent.namespaceURI;
 this._next = null;
 this._parent = parent;
 this.__data__ = datum;

}

EnterNode.prototype = {

 constructor: EnterNode,
 appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
 insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
 querySelector: function(selector) { return this._parent.querySelector(selector); },
 querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }

};

var constant$1 = function(x) {

 return function() {
   return x;
 };

};

var keyPrefix = "$"; // Protect against keys like “__proto__”.

function bindIndex(parent, group, enter, update, exit, data) {

 var i = 0,
     node,
     groupLength = group.length,
     dataLength = data.length;

 // Put any non-null nodes that fit into update.
 // Put any null nodes into enter.
 // Put any remaining data into enter.
 for (; i < dataLength; ++i) {
   if (node = group[i]) {
     node.__data__ = data[i];
     update[i] = node;
   } else {
     enter[i] = new EnterNode(parent, data[i]);
   }
 }

 // Put any non-null nodes that don’t fit into exit.
 for (; i < groupLength; ++i) {
   if (node = group[i]) {
     exit[i] = node;
   }
 }

}

function bindKey(parent, group, enter, update, exit, data, key) {

 var i,
     node,
     nodeByKeyValue = {},
     groupLength = group.length,
     dataLength = data.length,
     keyValues = new Array(groupLength),
     keyValue;

 // Compute the key for each node.
 // If multiple nodes have the same key, the duplicates are added to exit.
 for (i = 0; i < groupLength; ++i) {
   if (node = group[i]) {
     keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
     if (keyValue in nodeByKeyValue) {
       exit[i] = node;
     } else {
       nodeByKeyValue[keyValue] = node;
     }
   }
 }

 // Compute the key for each datum.
 // If there a node associated with this key, join and add it to update.
 // If there is not (or the key is a duplicate), add it to enter.
 for (i = 0; i < dataLength; ++i) {
   keyValue = keyPrefix + key.call(parent, data[i], i, data);
   if (node = nodeByKeyValue[keyValue]) {
     update[i] = node;
     node.__data__ = data[i];
     nodeByKeyValue[keyValue] = null;
   } else {
     enter[i] = new EnterNode(parent, data[i]);
   }
 }

 // Add any remaining nodes that were not bound to data to exit.
 for (i = 0; i < groupLength; ++i) {
   if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
     exit[i] = node;
   }
 }

}

var selection_data = function(value, key) {

 if (!value) {
   data = new Array(this.size()), j = -1;
   this.each(function(d) { data[++j] = d; });
   return data;
 }

 var bind = key ? bindKey : bindIndex,
     parents = this._parents,
     groups = this._groups;

 if (typeof value !== "function") value = constant$1(value);

 for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
   var parent = parents[j],
       group = groups[j],
       groupLength = group.length,
       data = value.call(parent, parent && parent.__data__, j, parents),
       dataLength = data.length,
       enterGroup = enter[j] = new Array(dataLength),
       updateGroup = update[j] = new Array(dataLength),
       exitGroup = exit[j] = new Array(groupLength);

   bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);

   // Now connect the enter nodes to their following update node, such that
   // appendChild can insert the materialized enter node before this node,
   // rather than at the end of the parent node.
   for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
     if (previous = enterGroup[i0]) {
       if (i0 >= i1) i1 = i0 + 1;
       while (!(next = updateGroup[i1]) && ++i1 < dataLength);
       previous._next = next || null;
     }
   }
 }

 update = new Selection(update, parents);
 update._enter = enter;
 update._exit = exit;
 return update;

};

var selection_exit = function() {

 return new Selection(this._exit || this._groups.map(sparse), this._parents);

};

var selection_merge = function(selection$$1) {

 for (var groups0 = this._groups, groups1 = selection$$1._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
   for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
     if (node = group0[i] || group1[i]) {
       merge[i] = node;
     }
   }
 }

 for (; j < m0; ++j) {
   merges[j] = groups0[j];
 }

 return new Selection(merges, this._parents);

};

var selection_order = function() {

 for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
   for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
     if (node = group[i]) {
       if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);
       next = node;
     }
   }
 }

 return this;

};

var selection_sort = function(compare) {

 if (!compare) compare = ascending$1;

 function compareNode(a, b) {
   return a && b ? compare(a.__data__, b.__data__) : !a - !b;
 }

 for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
   for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
     if (node = group[i]) {
       sortgroup[i] = node;
     }
   }
   sortgroup.sort(compareNode);
 }

 return new Selection(sortgroups, this._parents).order();

};

function ascending$1(a, b) {

 return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;

}

var selection_call = function() {

 var callback = arguments[0];
 arguments[0] = this;
 callback.apply(null, arguments);
 return this;

};

var selection_nodes = function() {

 var nodes = new Array(this.size()), i = -1;
 this.each(function() { nodes[++i] = this; });
 return nodes;

};

var selection_node = function() {

 for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
   for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
     var node = group[i];
     if (node) return node;
   }
 }

 return null;

};

var selection_size = function() {

 var size = 0;
 this.each(function() { ++size; });
 return size;

};

var selection_empty = function() {

 return !this.node();

};

var selection_each = function(callback) {

 for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
   for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
     if (node = group[i]) callback.call(node, node.__data__, i, group);
   }
 }

 return this;

};

function attrRemove(name) {

 return function() {
   this.removeAttribute(name);
 };

}

function attrRemoveNS(fullname) {

 return function() {
   this.removeAttributeNS(fullname.space, fullname.local);
 };

}

function attrConstant(name, value) {

 return function() {
   this.setAttribute(name, value);
 };

}

function attrConstantNS(fullname, value) {

 return function() {
   this.setAttributeNS(fullname.space, fullname.local, value);
 };

}

function attrFunction(name, value) {

 return function() {
   var v = value.apply(this, arguments);
   if (v == null) this.removeAttribute(name);
   else this.setAttribute(name, v);
 };

}

function attrFunctionNS(fullname, value) {

 return function() {
   var v = value.apply(this, arguments);
   if (v == null) this.removeAttributeNS(fullname.space, fullname.local);
   else this.setAttributeNS(fullname.space, fullname.local, v);
 };

}

var selection_attr = function(name, value) {

 var fullname = namespace(name);

 if (arguments.length < 2) {
   var node = this.node();
   return fullname.local
       ? node.getAttributeNS(fullname.space, fullname.local)
       : node.getAttribute(fullname);
 }

 return this.each((value == null
     ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function"
     ? (fullname.local ? attrFunctionNS : attrFunction)
     : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));

};

var defaultView = function(node) {

 return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
     || (node.document && node) // node is a Window
     || node.defaultView; // node is a Document

};

function styleRemove(name) {

 return function() {
   this.style.removeProperty(name);
 };

}

function styleConstant(name, value, priority) {

 return function() {
   this.style.setProperty(name, value, priority);
 };

}

function styleFunction(name, value, priority) {

 return function() {
   var v = value.apply(this, arguments);
   if (v == null) this.style.removeProperty(name);
   else this.style.setProperty(name, v, priority);
 };

}

var selection_style = function(name, value, priority) {

 return arguments.length > 1
     ? this.each((value == null
           ? styleRemove : typeof value === "function"
           ? styleFunction
           : styleConstant)(name, value, priority == null ? "" : priority))
     : styleValue(this.node(), name);

};

function styleValue(node, name) {

 return node.style.getPropertyValue(name)
     || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);

}

function propertyRemove(name) {

 return function() {
   delete this[name];
 };

}

function propertyConstant(name, value) {

 return function() {
   this[name] = value;
 };

}

function propertyFunction(name, value) {

 return function() {
   var v = value.apply(this, arguments);
   if (v == null) delete this[name];
   else this[name] = v;
 };

}

var selection_property = function(name, value) {

 return arguments.length > 1
     ? this.each((value == null
         ? propertyRemove : typeof value === "function"
         ? propertyFunction
         : propertyConstant)(name, value))
     : this.node()[name];

};

function classArray(string) {

 return string.trim().split(/^|\s+/);

}

function classList(node) {

 return node.classList || new ClassList(node);

}

function ClassList(node) {

 this._node = node;
 this._names = classArray(node.getAttribute("class") || "");

}

ClassList.prototype = {

 add: function(name) {
   var i = this._names.indexOf(name);
   if (i < 0) {
     this._names.push(name);
     this._node.setAttribute("class", this._names.join(" "));
   }
 },
 remove: function(name) {
   var i = this._names.indexOf(name);
   if (i >= 0) {
     this._names.splice(i, 1);
     this._node.setAttribute("class", this._names.join(" "));
   }
 },
 contains: function(name) {
   return this._names.indexOf(name) >= 0;
 }

};

function classedAdd(node, names) {

 var list = classList(node), i = -1, n = names.length;
 while (++i < n) list.add(names[i]);

}

function classedRemove(node, names) {

 var list = classList(node), i = -1, n = names.length;
 while (++i < n) list.remove(names[i]);

}

function classedTrue(names) {

 return function() {
   classedAdd(this, names);
 };

}

function classedFalse(names) {

 return function() {
   classedRemove(this, names);
 };

}

function classedFunction(names, value) {

 return function() {
   (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
 };

}

var selection_classed = function(name, value) {

 var names = classArray(name + "");

 if (arguments.length < 2) {
   var list = classList(this.node()), i = -1, n = names.length;
   while (++i < n) if (!list.contains(names[i])) return false;
   return true;
 }

 return this.each((typeof value === "function"
     ? classedFunction : value
     ? classedTrue
     : classedFalse)(names, value));

};

function textRemove() {

 this.textContent = "";

}

function textConstant(value) {

 return function() {
   this.textContent = value;
 };

}

function textFunction(value) {

 return function() {
   var v = value.apply(this, arguments);
   this.textContent = v == null ? "" : v;
 };

}

var selection_text = function(value) {

 return arguments.length
     ? this.each(value == null
         ? textRemove : (typeof value === "function"
         ? textFunction
         : textConstant)(value))
     : this.node().textContent;

};

function htmlRemove() {

 this.innerHTML = "";

}

function htmlConstant(value) {

 return function() {
   this.innerHTML = value;
 };

}

function htmlFunction(value) {

 return function() {
   var v = value.apply(this, arguments);
   this.innerHTML = v == null ? "" : v;
 };

}

var selection_html = function(value) {

 return arguments.length
     ? this.each(value == null
         ? htmlRemove : (typeof value === "function"
         ? htmlFunction
         : htmlConstant)(value))
     : this.node().innerHTML;

};

function raise() {

 if (this.nextSibling) this.parentNode.appendChild(this);

}

var selection_raise = function() {

 return this.each(raise);

};

function lower() {

 if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);

}

var selection_lower = function() {

 return this.each(lower);

};

var selection_append = function(name) {

 var create = typeof name === "function" ? name : creator(name);
 return this.select(function() {
   return this.appendChild(create.apply(this, arguments));
 });

};

function constantNull() {

 return null;

}

var selection_insert = function(name, before) {

 var create = typeof name === "function" ? name : creator(name),
     select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
 return this.select(function() {
   return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
 });

};

function remove() {

 var parent = this.parentNode;
 if (parent) parent.removeChild(this);

}

var selection_remove = function() {

 return this.each(remove);

};

var selection_datum = function(value) {

 return arguments.length
     ? this.property("__data__", value)
     : this.node().__data__;

};

function dispatchEvent(node, type, params) {

 var window = defaultView(node),
     event = window.CustomEvent;

 if (typeof event === "function") {
   event = new event(type, params);
 } else {
   event = window.document.createEvent("Event");
   if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;
   else event.initEvent(type, false, false);
 }

 node.dispatchEvent(event);

}

function dispatchConstant(type, params) {

 return function() {
   return dispatchEvent(this, type, params);
 };

}

function dispatchFunction(type, params) {

 return function() {
   return dispatchEvent(this, type, params.apply(this, arguments));
 };

}

var selection_dispatch = function(type, params) {

 return this.each((typeof params === "function"
     ? dispatchFunction
     : dispatchConstant)(type, params));

};

var root = [null];

function Selection(groups, parents) {

 this._groups = groups;
 this._parents = parents;

}

function selection() {

 return new Selection(document.documentElement, root);

}

Selection.prototype = selection.prototype = {

 constructor: Selection,
 select: selection_select,
 selectAll: selection_selectAll,
 filter: selection_filter,
 data: selection_data,
 enter: selection_enter,
 exit: selection_exit,
 merge: selection_merge,
 order: selection_order,
 sort: selection_sort,
 call: selection_call,
 nodes: selection_nodes,
 node: selection_node,
 size: selection_size,
 empty: selection_empty,
 each: selection_each,
 attr: selection_attr,
 style: selection_style,
 property: selection_property,
 classed: selection_classed,
 text: selection_text,
 html: selection_html,
 raise: selection_raise,
 lower: selection_lower,
 append: selection_append,
 insert: selection_insert,
 remove: selection_remove,
 datum: selection_datum,
 on: selection_on,
 dispatch: selection_dispatch

};

var select = function(selector) {

 return typeof selector === "string"
     ? new Selection(document.querySelector(selector), [document.documentElement])
     : new Selection(selector, root);

};

var selectAll = function(selector) {

 return typeof selector === "string"
     ? new Selection([document.querySelectorAll(selector)], [document.documentElement])
     : new Selection([selector == null ? [] : selector], root);

};

var touch = function(node, touches, identifier) {

 if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;

 for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
   if ((touch = touches[i]).identifier === identifier) {
     return point(node, touch);
   }
 }

 return null;

};

var touches = function(node, touches) {

 if (touches == null) touches = sourceEvent().touches;

 for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) {
   points[i] = point(node, touches[i]);
 }

 return points;

};

function nopropagation() {

 exports.event.stopImmediatePropagation();

}

var noevent = function() {

 exports.event.preventDefault();
 exports.event.stopImmediatePropagation();

};

var dragDisable = function(view) {

 var root = view.document.documentElement,
     selection = select(view).on("dragstart.drag", noevent, true);
 if ("onselectstart" in root) {
   selection.on("selectstart.drag", noevent, true);
 } else {
   root.__noselect = root.style.MozUserSelect;
   root.style.MozUserSelect = "none";
 }

};

function yesdrag(view, noclick) {

 var root = view.document.documentElement,
     selection = select(view).on("dragstart.drag", null);
 if (noclick) {
   selection.on("click.drag", noevent, true);
   setTimeout(function() { selection.on("click.drag", null); }, 0);
 }
 if ("onselectstart" in root) {
   selection.on("selectstart.drag", null);
 } else {
   root.style.MozUserSelect = root.__noselect;
   delete root.__noselect;
 }

}

var constant$2 = function(x) {

 return function() {
   return x;
 };

};

function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {

 this.target = target;
 this.type = type;
 this.subject = subject;
 this.identifier = id;
 this.active = active;
 this.x = x;
 this.y = y;
 this.dx = dx;
 this.dy = dy;
 this._ = dispatch;

}

DragEvent.prototype.on = function() {

 var value = this._.on.apply(this._, arguments);
 return value === this._ ? this : value;

};

// Ignore right-click, since that should open the context menu. function defaultFilter$1() {

 return !exports.event.button;

}

function defaultContainer() {

 return this.parentNode;

}

function defaultSubject(d) {

 return d == null ? {x: exports.event.x, y: exports.event.y} : d;

}

function defaultTouchable() {

 return "ontouchstart" in this;

}

var drag = function() {

 var filter = defaultFilter$1,
     container = defaultContainer,
     subject = defaultSubject,
     touchable = defaultTouchable,
     gestures = {},
     listeners = dispatch("start", "drag", "end"),
     active = 0,
     mousedownx,
     mousedowny,
     mousemoving,
     touchending,
     clickDistance2 = 0;

 function drag(selection) {
   selection
       .on("mousedown.drag", mousedowned)
     .filter(touchable)
       .on("touchstart.drag", touchstarted)
       .on("touchmove.drag", touchmoved)
       .on("touchend.drag touchcancel.drag", touchended)
       .style("touch-action", "none")
       .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
 }

 function mousedowned() {
   if (touchending || !filter.apply(this, arguments)) return;
   var gesture = beforestart("mouse", container.apply(this, arguments), mouse, this, arguments);
   if (!gesture) return;
   select(exports.event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
   dragDisable(exports.event.view);
   nopropagation();
   mousemoving = false;
   mousedownx = exports.event.clientX;
   mousedowny = exports.event.clientY;
   gesture("start");
 }

 function mousemoved() {
   noevent();
   if (!mousemoving) {
     var dx = exports.event.clientX - mousedownx, dy = exports.event.clientY - mousedowny;
     mousemoving = dx * dx + dy * dy > clickDistance2;
   }
   gestures.mouse("drag");
 }

 function mouseupped() {
   select(exports.event.view).on("mousemove.drag mouseup.drag", null);
   yesdrag(exports.event.view, mousemoving);
   noevent();
   gestures.mouse("end");
 }

 function touchstarted() {
   if (!filter.apply(this, arguments)) return;
   var touches = exports.event.changedTouches,
       c = container.apply(this, arguments),
       n = touches.length, i, gesture;

   for (i = 0; i < n; ++i) {
     if (gesture = beforestart(touches[i].identifier, c, touch, this, arguments)) {
       nopropagation();
       gesture("start");
     }
   }
 }

 function touchmoved() {
   var touches = exports.event.changedTouches,
       n = touches.length, i, gesture;

   for (i = 0; i < n; ++i) {
     if (gesture = gestures[touches[i].identifier]) {
       noevent();
       gesture("drag");
     }
   }
 }

 function touchended() {
   var touches = exports.event.changedTouches,
       n = touches.length, i, gesture;

   if (touchending) clearTimeout(touchending);
   touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
   for (i = 0; i < n; ++i) {
     if (gesture = gestures[touches[i].identifier]) {
       nopropagation();
       gesture("end");
     }
   }
 }

 function beforestart(id, container, point, that, args) {
   var p = point(container, id), s, dx, dy,
       sublisteners = listeners.copy();

   if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
     if ((exports.event.subject = s = subject.apply(that, args)) == null) return false;
     dx = s.x - p[0] || 0;
     dy = s.y - p[1] || 0;
     return true;
   })) return;

   return function gesture(type) {
     var p0 = p, n;
     switch (type) {
       case "start": gestures[id] = gesture, n = active++; break;
       case "end": delete gestures[id], --active; // nobreak
       case "drag": p = point(container, id), n = active; break;
     }
     customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
   };
 }

 drag.filter = function(_) {
   return arguments.length ? (filter = typeof _ === "function" ? _ : constant$2(!!_), drag) : filter;
 };

 drag.container = function(_) {
   return arguments.length ? (container = typeof _ === "function" ? _ : constant$2(_), drag) : container;
 };

 drag.subject = function(_) {
   return arguments.length ? (subject = typeof _ === "function" ? _ : constant$2(_), drag) : subject;
 };

 drag.touchable = function(_) {
   return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$2(!!_), drag) : touchable;
 };

 drag.on = function() {
   var value = listeners.on.apply(listeners, arguments);
   return value === listeners ? drag : value;
 };

 drag.clickDistance = function(_) {
   return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
 };

 return drag;

};

var define = function(constructor, factory, prototype) {

 constructor.prototype = factory.prototype = prototype;
 prototype.constructor = constructor;

};

function extend(parent, definition) {

 var prototype = Object.create(parent.prototype);
 for (var key in definition) prototype[key] = definition[key];
 return prototype;

}

function Color() {}

var darker = 0.7; var brighter = 1 / darker;

var reI = "\\s*([+-]?\\d+)\\s*"; var reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*"; var reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*"; var reHex3 = /^#([0-9a-f]{3})$/; var reHex6 = /^#([0-9a-f]{6})$/; var reRgbInteger = new RegExp("^rgb\$" + [reI, reI, reI] + "\$$"); var reRgbPercent = new RegExp("^rgb\$" + [reP, reP, reP] + "\$$"); var reRgbaInteger = new RegExp("^rgba\$" + [reI, reI, reI, reN] + "\$$"); var reRgbaPercent = new RegExp("^rgba\$" + [reP, reP, reP, reN] + "\$$"); var reHslPercent = new RegExp("^hsl\$" + [reN, reP, reP] + "\$$"); var reHslaPercent = new RegExp("^hsla\$" + [reN, reP, reP, reN] + "\$$");

var named = {

 aliceblue: 0xf0f8ff,
 antiquewhite: 0xfaebd7,
 aqua: 0x00ffff,
 aquamarine: 0x7fffd4,
 azure: 0xf0ffff,
 beige: 0xf5f5dc,
 bisque: 0xffe4c4,
 black: 0x000000,
 blanchedalmond: 0xffebcd,
 blue: 0x0000ff,
 blueviolet: 0x8a2be2,
 brown: 0xa52a2a,
 burlywood: 0xdeb887,
 cadetblue: 0x5f9ea0,
 chartreuse: 0x7fff00,
 chocolate: 0xd2691e,
 coral: 0xff7f50,
 cornflowerblue: 0x6495ed,
 cornsilk: 0xfff8dc,
 crimson: 0xdc143c,
 cyan: 0x00ffff,
 darkblue: 0x00008b,
 darkcyan: 0x008b8b,
 darkgoldenrod: 0xb8860b,
 darkgray: 0xa9a9a9,
 darkgreen: 0x006400,
 darkgrey: 0xa9a9a9,
 darkkhaki: 0xbdb76b,
 darkmagenta: 0x8b008b,
 darkolivegreen: 0x556b2f,
 darkorange: 0xff8c00,
 darkorchid: 0x9932cc,
 darkred: 0x8b0000,
 darksalmon: 0xe9967a,
 darkseagreen: 0x8fbc8f,
 darkslateblue: 0x483d8b,
 darkslategray: 0x2f4f4f,
 darkslategrey: 0x2f4f4f,
 darkturquoise: 0x00ced1,
 darkviolet: 0x9400d3,
 deeppink: 0xff1493,
 deepskyblue: 0x00bfff,
 dimgray: 0x696969,
 dimgrey: 0x696969,
 dodgerblue: 0x1e90ff,
 firebrick: 0xb22222,
 floralwhite: 0xfffaf0,
 forestgreen: 0x228b22,
 fuchsia: 0xff00ff,
 gainsboro: 0xdcdcdc,
 ghostwhite: 0xf8f8ff,
 gold: 0xffd700,
 goldenrod: 0xdaa520,
 gray: 0x808080,
 green: 0x008000,
 greenyellow: 0xadff2f,
 grey: 0x808080,
 honeydew: 0xf0fff0,
 hotpink: 0xff69b4,
 indianred: 0xcd5c5c,
 indigo: 0x4b0082,
 ivory: 0xfffff0,
 khaki: 0xf0e68c,
 lavender: 0xe6e6fa,
 lavenderblush: 0xfff0f5,
 lawngreen: 0x7cfc00,
 lemonchiffon: 0xfffacd,
 lightblue: 0xadd8e6,
 lightcoral: 0xf08080,
 lightcyan: 0xe0ffff,
 lightgoldenrodyellow: 0xfafad2,
 lightgray: 0xd3d3d3,
 lightgreen: 0x90ee90,
 lightgrey: 0xd3d3d3,
 lightpink: 0xffb6c1,
 lightsalmon: 0xffa07a,
 lightseagreen: 0x20b2aa,
 lightskyblue: 0x87cefa,
 lightslategray: 0x778899,
 lightslategrey: 0x778899,
 lightsteelblue: 0xb0c4de,
 lightyellow: 0xffffe0,
 lime: 0x00ff00,
 limegreen: 0x32cd32,
 linen: 0xfaf0e6,
 magenta: 0xff00ff,
 maroon: 0x800000,
 mediumaquamarine: 0x66cdaa,
 mediumblue: 0x0000cd,
 mediumorchid: 0xba55d3,
 mediumpurple: 0x9370db,
 mediumseagreen: 0x3cb371,
 mediumslateblue: 0x7b68ee,
 mediumspringgreen: 0x00fa9a,
 mediumturquoise: 0x48d1cc,
 mediumvioletred: 0xc71585,
 midnightblue: 0x191970,
 mintcream: 0xf5fffa,
 mistyrose: 0xffe4e1,
 moccasin: 0xffe4b5,
 navajowhite: 0xffdead,
 navy: 0x000080,
 oldlace: 0xfdf5e6,
 olive: 0x808000,
 olivedrab: 0x6b8e23,
 orange: 0xffa500,
 orangered: 0xff4500,
 orchid: 0xda70d6,
 palegoldenrod: 0xeee8aa,
 palegreen: 0x98fb98,
 paleturquoise: 0xafeeee,
 palevioletred: 0xdb7093,
 papayawhip: 0xffefd5,
 peachpuff: 0xffdab9,
 peru: 0xcd853f,
 pink: 0xffc0cb,
 plum: 0xdda0dd,
 powderblue: 0xb0e0e6,
 purple: 0x800080,
 rebeccapurple: 0x663399,
 red: 0xff0000,
 rosybrown: 0xbc8f8f,
 royalblue: 0x4169e1,
 saddlebrown: 0x8b4513,
 salmon: 0xfa8072,
 sandybrown: 0xf4a460,
 seagreen: 0x2e8b57,
 seashell: 0xfff5ee,
 sienna: 0xa0522d,
 silver: 0xc0c0c0,
 skyblue: 0x87ceeb,
 slateblue: 0x6a5acd,
 slategray: 0x708090,
 slategrey: 0x708090,
 snow: 0xfffafa,
 springgreen: 0x00ff7f,
 steelblue: 0x4682b4,
 tan: 0xd2b48c,
 teal: 0x008080,
 thistle: 0xd8bfd8,
 tomato: 0xff6347,
 turquoise: 0x40e0d0,
 violet: 0xee82ee,
 wheat: 0xf5deb3,
 white: 0xffffff,
 whitesmoke: 0xf5f5f5,
 yellow: 0xffff00,
 yellowgreen: 0x9acd32

};

define(Color, color, {

 displayable: function() {
   return this.rgb().displayable();
 },
 toString: function() {
   return this.rgb() + "";
 }

});

function color(format) {

 var m;
 format = (format + "").trim().toLowerCase();
 return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00
     : (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000
     : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
     : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
     : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
     : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
     : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
     : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
     : named.hasOwnProperty(format) ? rgbn(named[format])
     : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
     : null;

}

function rgbn(n) {

 return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);

}

function rgba(r, g, b, a) {

 if (a <= 0) r = g = b = NaN;
 return new Rgb(r, g, b, a);

}

function rgbConvert(o) {

 if (!(o instanceof Color)) o = color(o);
 if (!o) return new Rgb;
 o = o.rgb();
 return new Rgb(o.r, o.g, o.b, o.opacity);

}

function rgb(r, g, b, opacity) {

 return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);

}

function Rgb(r, g, b, opacity) {

 this.r = +r;
 this.g = +g;
 this.b = +b;
 this.opacity = +opacity;

}

define(Rgb, rgb, extend(Color, {

 brighter: function(k) {
   k = k == null ? brighter : Math.pow(brighter, k);
   return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
 },
 darker: function(k) {
   k = k == null ? darker : Math.pow(darker, k);
   return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
 },
 rgb: function() {
   return this;
 },
 displayable: function() {
   return (0 <= this.r && this.r <= 255)
       && (0 <= this.g && this.g <= 255)
       && (0 <= this.b && this.b <= 255)
       && (0 <= this.opacity && this.opacity <= 1);
 },
 toString: function() {
   var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
   return (a === 1 ? "rgb(" : "rgba(")
       + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
       + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
       + Math.max(0, Math.min(255, Math.round(this.b) || 0))
       + (a === 1 ? ")" : ", " + a + ")");
 }

}));

function hsla(h, s, l, a) {

 if (a <= 0) h = s = l = NaN;
 else if (l <= 0 || l >= 1) h = s = NaN;
 else if (s <= 0) h = NaN;
 return new Hsl(h, s, l, a);

}

function hslConvert(o) {

 if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
 if (!(o instanceof Color)) o = color(o);
 if (!o) return new Hsl;
 if (o instanceof Hsl) return o;
 o = o.rgb();
 var r = o.r / 255,
     g = o.g / 255,
     b = o.b / 255,
     min = Math.min(r, g, b),
     max = Math.max(r, g, b),
     h = NaN,
     s = max - min,
     l = (max + min) / 2;
 if (s) {
   if (r === max) h = (g - b) / s + (g < b) * 6;
   else if (g === max) h = (b - r) / s + 2;
   else h = (r - g) / s + 4;
   s /= l < 0.5 ? max + min : 2 - max - min;
   h *= 60;
 } else {
   s = l > 0 && l < 1 ? 0 : h;
 }
 return new Hsl(h, s, l, o.opacity);

}

function hsl(h, s, l, opacity) {

 return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);

}

function Hsl(h, s, l, opacity) {

 this.h = +h;
 this.s = +s;
 this.l = +l;
 this.opacity = +opacity;

}

define(Hsl, hsl, extend(Color, {

 brighter: function(k) {
   k = k == null ? brighter : Math.pow(brighter, k);
   return new Hsl(this.h, this.s, this.l * k, this.opacity);
 },
 darker: function(k) {
   k = k == null ? darker : Math.pow(darker, k);
   return new Hsl(this.h, this.s, this.l * k, this.opacity);
 },
 rgb: function() {
   var h = this.h % 360 + (this.h < 0) * 360,
       s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
       l = this.l,
       m2 = l + (l < 0.5 ? l : 1 - l) * s,
       m1 = 2 * l - m2;
   return new Rgb(
     hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
     hsl2rgb(h, m1, m2),
     hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
     this.opacity
   );
 },
 displayable: function() {
   return (0 <= this.s && this.s <= 1 || isNaN(this.s))
       && (0 <= this.l && this.l <= 1)
       && (0 <= this.opacity && this.opacity <= 1);
 }

}));

/* From FvD 13.37, CSS Color Module Level 3 */ function hsl2rgb(h, m1, m2) {

 return (h < 60 ? m1 + (m2 - m1) * h / 60
     : h < 180 ? m2
     : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60
     : m1) * 255;

}

var deg2rad = Math.PI / 180; var rad2deg = 180 / Math.PI;

var Kn = 18; var Xn = 0.950470; var Yn = 1; var Zn = 1.088830; var t0 = 4 / 29; var t1 = 6 / 29; var t2 = 3 * t1 * t1; var t3 = t1 * t1 * t1;

function labConvert(o) {

 if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
 if (o instanceof Hcl) {
   var h = o.h * deg2rad;
   return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
 }
 if (!(o instanceof Rgb)) o = rgbConvert(o);
 var b = rgb2xyz(o.r),
     a = rgb2xyz(o.g),
     l = rgb2xyz(o.b),
     x = xyz2lab((0.4124564 * b + 0.3575761 * a + 0.1804375 * l) / Xn),
     y = xyz2lab((0.2126729 * b + 0.7151522 * a + 0.0721750 * l) / Yn),
     z = xyz2lab((0.0193339 * b + 0.1191920 * a + 0.9503041 * l) / Zn);
 return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);

}

function lab(l, a, b, opacity) {

 return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);

}

function Lab(l, a, b, opacity) {

 this.l = +l;
 this.a = +a;
 this.b = +b;
 this.opacity = +opacity;

}

define(Lab, lab, extend(Color, {

 brighter: function(k) {
   return new Lab(this.l + Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
 },
 darker: function(k) {
   return new Lab(this.l - Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
 },
 rgb: function() {
   var y = (this.l + 16) / 116,
       x = isNaN(this.a) ? y : y + this.a / 500,
       z = isNaN(this.b) ? y : y - this.b / 200;
   y = Yn * lab2xyz(y);
   x = Xn * lab2xyz(x);
   z = Zn * lab2xyz(z);
   return new Rgb(
     xyz2rgb( 3.2404542 * x - 1.5371385 * y - 0.4985314 * z), // D65 -> sRGB
     xyz2rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z),
     xyz2rgb( 0.0556434 * x - 0.2040259 * y + 1.0572252 * z),
     this.opacity
   );
 }

}));

function xyz2lab(t) {

 return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;

}

function lab2xyz(t) {

 return t > t1 ? t * t * t : t2 * (t - t0);

}

function xyz2rgb(x) {

 return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);

}

function rgb2xyz(x) {

 return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);

}

function hclConvert(o) {

 if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
 if (!(o instanceof Lab)) o = labConvert(o);
 var h = Math.atan2(o.b, o.a) * rad2deg;
 return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);

}

function hcl(h, c, l, opacity) {

 return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);

}

function Hcl(h, c, l, opacity) {

 this.h = +h;
 this.c = +c;
 this.l = +l;
 this.opacity = +opacity;

}

define(Hcl, hcl, extend(Color, {

 brighter: function(k) {
   return new Hcl(this.h, this.c, this.l + Kn * (k == null ? 1 : k), this.opacity);
 },
 darker: function(k) {
   return new Hcl(this.h, this.c, this.l - Kn * (k == null ? 1 : k), this.opacity);
 },
 rgb: function() {
   return labConvert(this).rgb();
 }

}));

var A = -0.14861; var B = +1.78277; var C = -0.29227; var D = -0.90649; var E = +1.97294; var ED = E * D; var EB = E * B; var BC_DA = B * C - D * A;

function cubehelixConvert(o) {

 if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
 if (!(o instanceof Rgb)) o = rgbConvert(o);
 var r = o.r / 255,
     g = o.g / 255,
     b = o.b / 255,
     l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),
     bl = b - l,
     k = (E * (g - l) - C * bl) / D,
     s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1
     h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;
 return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);

}

function cubehelix(h, s, l, opacity) {

 return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);

}

function Cubehelix(h, s, l, opacity) {

 this.h = +h;
 this.s = +s;
 this.l = +l;
 this.opacity = +opacity;

}

define(Cubehelix, cubehelix, extend(Color, {

 brighter: function(k) {
   k = k == null ? brighter : Math.pow(brighter, k);
   return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
 },
 darker: function(k) {
   k = k == null ? darker : Math.pow(darker, k);
   return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
 },
 rgb: function() {
   var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad,
       l = +this.l,
       a = isNaN(this.s) ? 0 : this.s * l * (1 - l),
       cosh = Math.cos(h),
       sinh = Math.sin(h);
   return new Rgb(
     255 * (l + a * (A * cosh + B * sinh)),
     255 * (l + a * (C * cosh + D * sinh)),
     255 * (l + a * (E * cosh)),
     this.opacity
   );
 }

}));

function basis(t1, v0, v1, v2, v3) {

 var t2 = t1 * t1, t3 = t2 * t1;
 return ((1 - 3 * t1 + 3 * t2 - t3) * v0
     + (4 - 6 * t2 + 3 * t3) * v1
     + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2
     + t3 * v3) / 6;

}

var basis$1 = function(values) {

 var n = values.length - 1;
 return function(t) {
   var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),
       v1 = values[i],
       v2 = values[i + 1],
       v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,
       v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;
   return basis((t - i / n) * n, v0, v1, v2, v3);
 };

};

var basisClosed = function(values) {

 var n = values.length;
 return function(t) {
   var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),
       v0 = values[(i + n - 1) % n],
       v1 = values[i % n],
       v2 = values[(i + 1) % n],
       v3 = values[(i + 2) % n];
   return basis((t - i / n) * n, v0, v1, v2, v3);
 };

};

var constant$3 = function(x) {

 return function() {
   return x;
 };

};

function linear(a, d) {

 return function(t) {
   return a + t * d;
 };

}

function exponential(a, b, y) {

 return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
   return Math.pow(a + t * b, y);
 };

}

function hue(a, b) {

 var d = b - a;
 return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant$3(isNaN(a) ? b : a);

}

function gamma(y) {

 return (y = +y) === 1 ? nogamma : function(a, b) {
   return b - a ? exponential(a, b, y) : constant$3(isNaN(a) ? b : a);
 };

}

function nogamma(a, b) {

 var d = b - a;
 return d ? linear(a, d) : constant$3(isNaN(a) ? b : a);

}

var interpolateRgb = (function rgbGamma(y) {

 var color$$1 = gamma(y);

 function rgb$$1(start, end) {
   var r = color$$1((start = rgb(start)).r, (end = rgb(end)).r),
       g = color$$1(start.g, end.g),
       b = color$$1(start.b, end.b),
       opacity = nogamma(start.opacity, end.opacity);
   return function(t) {
     start.r = r(t);
     start.g = g(t);
     start.b = b(t);
     start.opacity = opacity(t);
     return start + "";
   };
 }

 rgb$$1.gamma = rgbGamma;

 return rgb$$1;

})(1);

function rgbSpline(spline) {

 return function(colors) {
   var n = colors.length,
       r = new Array(n),
       g = new Array(n),
       b = new Array(n),
       i, color$$1;
   for (i = 0; i < n; ++i) {
     color$$1 = rgb(colors[i]);
     r[i] = color$$1.r || 0;
     g[i] = color$$1.g || 0;
     b[i] = color$$1.b || 0;
   }
   r = spline(r);
   g = spline(g);
   b = spline(b);
   color$$1.opacity = 1;
   return function(t) {
     color$$1.r = r(t);
     color$$1.g = g(t);
     color$$1.b = b(t);
     return color$$1 + "";
   };
 };

}

var rgbBasis = rgbSpline(basis$1); var rgbBasisClosed = rgbSpline(basisClosed);

var array$1 = function(a, b) {

 var nb = b ? b.length : 0,
     na = a ? Math.min(nb, a.length) : 0,
     x = new Array(nb),
     c = new Array(nb),
     i;

 for (i = 0; i < na; ++i) x[i] = interpolateValue(a[i], b[i]);
 for (; i < nb; ++i) c[i] = b[i];

 return function(t) {
   for (i = 0; i < na; ++i) c[i] = x[i](t);
   return c;
 };

};

var date = function(a, b) {

 var d = new Date;
 return a = +a, b -= a, function(t) {
   return d.setTime(a + b * t), d;
 };

};

var reinterpolate = function(a, b) {

 return a = +a, b -= a, function(t) {
   return a + b * t;
 };

};

var object = function(a, b) {

 var i = {},
     c = {},
     k;

 if (a === null || typeof a !== "object") a = {};
 if (b === null || typeof b !== "object") b = {};

 for (k in b) {
   if (k in a) {
     i[k] = interpolateValue(a[k], b[k]);
   } else {
     c[k] = b[k];
   }
 }

 return function(t) {
   for (k in i) c[k] = i[k](t);
   return c;
 };

};

var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g; var reB = new RegExp(reA.source, "g");

function zero(b) {

 return function() {
   return b;
 };

}

function one(b) {

 return function(t) {
   return b(t) + "";
 };

}

var interpolateString = function(a, b) {

 var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
     am, // current match in a
     bm, // current match in b
     bs, // string preceding current number in b, if any
     i = -1, // index in s
     s = [], // string constants and placeholders
     q = []; // number interpolators

 // Coerce inputs to strings.
 a = a + "", b = b + "";

 // Interpolate pairs of numbers in a & b.
 while ((am = reA.exec(a))
     && (bm = reB.exec(b))) {
   if ((bs = bm.index) > bi) { // a string precedes the next number in b
     bs = b.slice(bi, bs);
     if (s[i]) s[i] += bs; // coalesce with previous string
     else s[++i] = bs;
   }
   if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
     if (s[i]) s[i] += bm; // coalesce with previous string
     else s[++i] = bm;
   } else { // interpolate non-matching numbers
     s[++i] = null;
     q.push({i: i, x: reinterpolate(am, bm)});
   }
   bi = reB.lastIndex;
 }

 // Add remains of b.
 if (bi < b.length) {
   bs = b.slice(bi);
   if (s[i]) s[i] += bs; // coalesce with previous string
   else s[++i] = bs;
 }

 // Special optimization for only a single match.
 // Otherwise, interpolate each of the numbers and rejoin the string.
 return s.length < 2 ? (q[0]
     ? one(q[0].x)
     : zero(b))
     : (b = q.length, function(t) {
         for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
         return s.join("");
       });

};

var interpolateValue = function(a, b) {

 var t = typeof b, c;
 return b == null || t === "boolean" ? constant$3(b)
     : (t === "number" ? reinterpolate
     : t === "string" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString)
     : b instanceof color ? interpolateRgb
     : b instanceof Date ? date
     : Array.isArray(b) ? array$1
     : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
     : reinterpolate)(a, b);

};

var interpolateRound = function(a, b) {

 return a = +a, b -= a, function(t) {
   return Math.round(a + b * t);
 };

};

var degrees = 180 / Math.PI;

var identity$2 = {

 translateX: 0,
 translateY: 0,
 rotate: 0,
 skewX: 0,
 scaleX: 1,
 scaleY: 1

};

var decompose = function(a, b, c, d, e, f) {

 var scaleX, scaleY, skewX;
 if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
 if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
 if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
 if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
 return {
   translateX: e,
   translateY: f,
   rotate: Math.atan2(b, a) * degrees,
   skewX: Math.atan(skewX) * degrees,
   scaleX: scaleX,
   scaleY: scaleY
 };

};

var cssNode; var cssRoot; var cssView; var svgNode;

function parseCss(value) {

 if (value === "none") return identity$2;
 if (!cssNode) cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView;
 cssNode.style.transform = value;
 value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
 cssRoot.removeChild(cssNode);
 value = value.slice(7, -1).split(",");
 return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);

}

function parseSvg(value) {

 if (value == null) return identity$2;
 if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
 svgNode.setAttribute("transform", value);
 if (!(value = svgNode.transform.baseVal.consolidate())) return identity$2;
 value = value.matrix;
 return decompose(value.a, value.b, value.c, value.d, value.e, value.f);

}

function interpolateTransform(parse, pxComma, pxParen, degParen) {

 function pop(s) {
   return s.length ? s.pop() + " " : "";
 }

 function translate(xa, ya, xb, yb, s, q) {
   if (xa !== xb || ya !== yb) {
     var i = s.push("translate(", null, pxComma, null, pxParen);
     q.push({i: i - 4, x: reinterpolate(xa, xb)}, {i: i - 2, x: reinterpolate(ya, yb)});
   } else if (xb || yb) {
     s.push("translate(" + xb + pxComma + yb + pxParen);
   }
 }

 function rotate(a, b, s, q) {
   if (a !== b) {
     if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path
     q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: reinterpolate(a, b)});
   } else if (b) {
     s.push(pop(s) + "rotate(" + b + degParen);
   }
 }

 function skewX(a, b, s, q) {
   if (a !== b) {
     q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: reinterpolate(a, b)});
   } else if (b) {
     s.push(pop(s) + "skewX(" + b + degParen);
   }
 }

 function scale(xa, ya, xb, yb, s, q) {
   if (xa !== xb || ya !== yb) {
     var i = s.push(pop(s) + "scale(", null, ",", null, ")");
     q.push({i: i - 4, x: reinterpolate(xa, xb)}, {i: i - 2, x: reinterpolate(ya, yb)});
   } else if (xb !== 1 || yb !== 1) {
     s.push(pop(s) + "scale(" + xb + "," + yb + ")");
   }
 }

 return function(a, b) {
   var s = [], // string constants and placeholders
       q = []; // number interpolators
   a = parse(a), b = parse(b);
   translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
   rotate(a.rotate, b.rotate, s, q);
   skewX(a.skewX, b.skewX, s, q);
   scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
   a = b = null; // gc
   return function(t) {
     var i = -1, n = q.length, o;
     while (++i < n) s[(o = q[i]).i] = o.x(t);
     return s.join("");
   };
 };

}

var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)"); var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");

var rho = Math.SQRT2; var rho2 = 2; var rho4 = 4; var epsilon2 = 1e-12;

function cosh(x) {

 return ((x = Math.exp(x)) + 1 / x) / 2;

}

function sinh(x) {

 return ((x = Math.exp(x)) - 1 / x) / 2;

}

function tanh(x) {

 return ((x = Math.exp(2 * x)) - 1) / (x + 1);

}

// p0 = [ux0, uy0, w0] // p1 = [ux1, uy1, w1] var interpolateZoom = function(p0, p1) {

 var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
     ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
     dx = ux1 - ux0,
     dy = uy1 - uy0,
     d2 = dx * dx + dy * dy,
     i,
     S;

 // Special case for u0 ≅ u1.
 if (d2 < epsilon2) {
   S = Math.log(w1 / w0) / rho;
   i = function(t) {
     return [
       ux0 + t * dx,
       uy0 + t * dy,
       w0 * Math.exp(rho * t * S)
     ];
   };
 }

 // General case.
 else {
   var d1 = Math.sqrt(d2),
       b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
       b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
       r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
       r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
   S = (r1 - r0) / rho;
   i = function(t) {
     var s = t * S,
         coshr0 = cosh(r0),
         u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
     return [
       ux0 + u * dx,
       uy0 + u * dy,
       w0 * coshr0 / cosh(rho * s + r0)
     ];
   };
 }

 i.duration = S * 1000;

 return i;

};

function hsl$1(hue$$1) {

 return function(start, end) {
   var h = hue$$1((start = hsl(start)).h, (end = hsl(end)).h),
       s = nogamma(start.s, end.s),
       l = nogamma(start.l, end.l),
       opacity = nogamma(start.opacity, end.opacity);
   return function(t) {
     start.h = h(t);
     start.s = s(t);
     start.l = l(t);
     start.opacity = opacity(t);
     return start + "";
   };
 }

}

var hsl$2 = hsl$1(hue); var hslLong = hsl$1(nogamma);

function lab$1(start, end) {

 var l = nogamma((start = lab(start)).l, (end = lab(end)).l),
     a = nogamma(start.a, end.a),
     b = nogamma(start.b, end.b),
     opacity = nogamma(start.opacity, end.opacity);
 return function(t) {
   start.l = l(t);
   start.a = a(t);
   start.b = b(t);
   start.opacity = opacity(t);
   return start + "";
 };

}

function hcl$1(hue$$1) {

 return function(start, end) {
   var h = hue$$1((start = hcl(start)).h, (end = hcl(end)).h),
       c = nogamma(start.c, end.c),
       l = nogamma(start.l, end.l),
       opacity = nogamma(start.opacity, end.opacity);
   return function(t) {
     start.h = h(t);
     start.c = c(t);
     start.l = l(t);
     start.opacity = opacity(t);
     return start + "";
   };
 }

}

var hcl$2 = hcl$1(hue); var hclLong = hcl$1(nogamma);

function cubehelix$1(hue$$1) {

 return (function cubehelixGamma(y) {
   y = +y;

   function cubehelix$$1(start, end) {
     var h = hue$$1((start = cubehelix(start)).h, (end = cubehelix(end)).h),
         s = nogamma(start.s, end.s),
         l = nogamma(start.l, end.l),
         opacity = nogamma(start.opacity, end.opacity);
     return function(t) {
       start.h = h(t);
       start.s = s(t);
       start.l = l(Math.pow(t, y));
       start.opacity = opacity(t);
       return start + "";
     };
   }

   cubehelix$$1.gamma = cubehelixGamma;

   return cubehelix$$1;
 })(1);

}

var cubehelix$2 = cubehelix$1(hue); var cubehelixLong = cubehelix$1(nogamma);

var quantize = function(interpolator, n) {

 var samples = new Array(n);
 for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));
 return samples;

};

var frame = 0; var timeout = 0; var interval = 0; var pokeDelay = 1000; var taskHead; var taskTail; var clockLast = 0; var clockNow = 0; var clockSkew = 0; var clock = typeof performance === "object" && performance.now ? performance : Date; var setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };

function now() {

 return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);

}

function clearNow() {

 clockNow = 0;

}

function Timer() {

 this._call =
 this._time =
 this._next = null;

}

Timer.prototype = timer.prototype = {

 constructor: Timer,
 restart: function(callback, delay, time) {
   if (typeof callback !== "function") throw new TypeError("callback is not a function");
   time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
   if (!this._next && taskTail !== this) {
     if (taskTail) taskTail._next = this;
     else taskHead = this;
     taskTail = this;
   }
   this._call = callback;
   this._time = time;
   sleep();
 },
 stop: function() {
   if (this._call) {
     this._call = null;
     this._time = Infinity;
     sleep();
   }
 }

};

function timer(callback, delay, time) {

 var t = new Timer;
 t.restart(callback, delay, time);
 return t;

}

function timerFlush() {

 now(); // Get the current time, if not already set.
 ++frame; // Pretend we’ve set an alarm, if we haven’t already.
 var t = taskHead, e;
 while (t) {
   if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
   t = t._next;
 }
 --frame;

}

function wake() {

 clockNow = (clockLast = clock.now()) + clockSkew;
 frame = timeout = 0;
 try {
   timerFlush();
 } finally {
   frame = 0;
   nap();
   clockNow = 0;
 }

}

function poke() {

 var now = clock.now(), delay = now - clockLast;
 if (delay > pokeDelay) clockSkew -= delay, clockLast = now;

}

function nap() {

 var t0, t1 = taskHead, t2, time = Infinity;
 while (t1) {
   if (t1._call) {
     if (time > t1._time) time = t1._time;
     t0 = t1, t1 = t1._next;
   } else {
     t2 = t1._next, t1._next = null;
     t1 = t0 ? t0._next = t2 : taskHead = t2;
   }
 }
 taskTail = t0;
 sleep(time);

}

function sleep(time) {

 if (frame) return; // Soonest alarm already set, or will be.
 if (timeout) timeout = clearTimeout(timeout);
 var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
 if (delay > 24) {
   if (time < Infinity) timeout = setTimeout(wake, time - clock.now() - clockSkew);
   if (interval) interval = clearInterval(interval);
 } else {
   if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);
   frame = 1, setFrame(wake);
 }

}

var timeout$1 = function(callback, delay, time) {

 var t = new Timer;
 delay = delay == null ? 0 : +delay;
 t.restart(function(elapsed) {
   t.stop();
   callback(elapsed + delay);
 }, delay, time);
 return t;

};

var interval$1 = function(callback, delay, time) {

 var t = new Timer, total = delay;
 if (delay == null) return t.restart(callback, delay, time), t;
 delay = +delay, time = time == null ? now() : +time;
 t.restart(function tick(elapsed) {
   elapsed += total;
   t.restart(tick, total += delay, time);
   callback(elapsed);
 }, delay, time);
 return t;

};

var emptyOn = dispatch("start", "end", "interrupt"); var emptyTween = [];

var CREATED = 0; var SCHEDULED = 1; var STARTING = 2; var STARTED = 3; var RUNNING = 4; var ENDING = 5; var ENDED = 6;

var schedule = function(node, name, id, index, group, timing) {

 var schedules = node.__transition;
 if (!schedules) node.__transition = {};
 else if (id in schedules) return;
 create(node, id, {
   name: name,
   index: index, // For context during callback.
   group: group, // For context during callback.
   on: emptyOn,
   tween: emptyTween,
   time: timing.time,
   delay: timing.delay,
   duration: timing.duration,
   ease: timing.ease,
   timer: null,
   state: CREATED
 });

};

function init(node, id) {

 var schedule = node.__transition;
 if (!schedule || !(schedule = schedule[id]) || schedule.state > CREATED) throw new Error("too late");
 return schedule;

}

function set$1(node, id) {

 var schedule = node.__transition;
 if (!schedule || !(schedule = schedule[id]) || schedule.state > STARTING) throw new Error("too late");
 return schedule;

}

function get$1(node, id) {

 var schedule = node.__transition;
 if (!schedule || !(schedule = schedule[id])) throw new Error("too late");
 return schedule;

}

function create(node, id, self) {

 var schedules = node.__transition,
     tween;

 // Initialize the self timer when the transition is created.
 // Note the actual delay is not known until the first callback!
 schedules[id] = self;
 self.timer = timer(schedule, 0, self.time);

 function schedule(elapsed) {
   self.state = SCHEDULED;
   self.timer.restart(start, self.delay, self.time);

   // If the elapsed delay is less than our first sleep, start immediately.
   if (self.delay <= elapsed) start(elapsed - self.delay);
 }

 function start(elapsed) {
   var i, j, n, o;

   // If the state is not SCHEDULED, then we previously errored on start.
   if (self.state !== SCHEDULED) return stop();

   for (i in schedules) {
     o = schedules[i];
     if (o.name !== self.name) continue;

     // While this element already has a starting transition during this frame,
     // defer starting an interrupting transition until that transition has a
     // chance to tick (and possibly end); see d3/d3-transition#54!
     if (o.state === STARTED) return timeout$1(start);

     // Interrupt the active transition, if any.
     // Dispatch the interrupt event.
     if (o.state === RUNNING) {
       o.state = ENDED;
       o.timer.stop();
       o.on.call("interrupt", node, node.__data__, o.index, o.group);
       delete schedules[i];
     }

     // Cancel any pre-empted transitions. No interrupt event is dispatched
     // because the cancelled transitions never started. Note that this also
     // removes this transition from the pending list!
     else if (+i < id) {
       o.state = ENDED;
       o.timer.stop();
       delete schedules[i];
     }
   }

   // Defer the first tick to end of the current frame; see d3/d3#1576.
   // Note the transition may be canceled after start and before the first tick!
   // Note this must be scheduled before the start event; see d3/d3-transition#16!
   // Assuming this is successful, subsequent callbacks go straight to tick.
   timeout$1(function() {
     if (self.state === STARTED) {
       self.state = RUNNING;
       self.timer.restart(tick, self.delay, self.time);
       tick(elapsed);
     }
   });

   // Dispatch the start event.
   // Note this must be done before the tween are initialized.
   self.state = STARTING;
   self.on.call("start", node, node.__data__, self.index, self.group);
   if (self.state !== STARTING) return; // interrupted
   self.state = STARTED;

   // Initialize the tween, deleting null tween.
   tween = new Array(n = self.tween.length);
   for (i = 0, j = -1; i < n; ++i) {
     if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
       tween[++j] = o;
     }
   }
   tween.length = j + 1;
 }

 function tick(elapsed) {
   var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
       i = -1,
       n = tween.length;

   while (++i < n) {
     tween[i].call(null, t);
   }

   // Dispatch the end event.
   if (self.state === ENDING) {
     self.on.call("end", node, node.__data__, self.index, self.group);
     stop();
   }
 }

 function stop() {
   self.state = ENDED;
   self.timer.stop();
   delete schedules[id];
   for (var i in schedules) return; // eslint-disable-line no-unused-vars
   delete node.__transition;
 }

}

var interrupt = function(node, name) {

 var schedules = node.__transition,
     schedule$$1,
     active,
     empty = true,
     i;

 if (!schedules) return;

 name = name == null ? null : name + "";

 for (i in schedules) {
   if ((schedule$$1 = schedules[i]).name !== name) { empty = false; continue; }
   active = schedule$$1.state > STARTING && schedule$$1.state < ENDING;
   schedule$$1.state = ENDED;
   schedule$$1.timer.stop();
   if (active) schedule$$1.on.call("interrupt", node, node.__data__, schedule$$1.index, schedule$$1.group);
   delete schedules[i];
 }

 if (empty) delete node.__transition;

};

var selection_interrupt = function(name) {

 return this.each(function() {
   interrupt(this, name);
 });

};

function tweenRemove(id, name) {

 var tween0, tween1;
 return function() {
   var schedule$$1 = set$1(this, id),
       tween = schedule$$1.tween;

   // If this node shared tween with the previous node,
   // just assign the updated shared tween and we’re done!
   // Otherwise, copy-on-write.
   if (tween !== tween0) {
     tween1 = tween0 = tween;
     for (var i = 0, n = tween1.length; i < n; ++i) {
       if (tween1[i].name === name) {
         tween1 = tween1.slice();
         tween1.splice(i, 1);
         break;
       }
     }
   }

   schedule$$1.tween = tween1;
 };

}

function tweenFunction(id, name, value) {

 var tween0, tween1;
 if (typeof value !== "function") throw new Error;
 return function() {
   var schedule$$1 = set$1(this, id),
       tween = schedule$$1.tween;

   // If this node shared tween with the previous node,
   // just assign the updated shared tween and we’re done!
   // Otherwise, copy-on-write.
   if (tween !== tween0) {
     tween1 = (tween0 = tween).slice();
     for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {
       if (tween1[i].name === name) {
         tween1[i] = t;
         break;
       }
     }
     if (i === n) tween1.push(t);
   }

   schedule$$1.tween = tween1;
 };

}

var transition_tween = function(name, value) {

 var id = this._id;

 name += "";

 if (arguments.length < 2) {
   var tween = get$1(this.node(), id).tween;
   for (var i = 0, n = tween.length, t; i < n; ++i) {
     if ((t = tween[i]).name === name) {
       return t.value;
     }
   }
   return null;
 }

 return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));

};

function tweenValue(transition, name, value) {

 var id = transition._id;

 transition.each(function() {
   var schedule$$1 = set$1(this, id);
   (schedule$$1.value || (schedule$$1.value = {}))[name] = value.apply(this, arguments);
 });

 return function(node) {
   return get$1(node, id).value[name];
 };

}

var interpolate = function(a, b) {

 var c;
 return (typeof b === "number" ? reinterpolate
     : b instanceof color ? interpolateRgb
     : (c = color(b)) ? (b = c, interpolateRgb)
     : interpolateString)(a, b);

};

function attrRemove$1(name) {

 return function() {
   this.removeAttribute(name);
 };

}

function attrRemoveNS$1(fullname) {

 return function() {
   this.removeAttributeNS(fullname.space, fullname.local);
 };

}

function attrConstant$1(name, interpolate$$1, value1) {

 var value00,
     interpolate0;
 return function() {
   var value0 = this.getAttribute(name);
   return value0 === value1 ? null
       : value0 === value00 ? interpolate0
       : interpolate0 = interpolate$$1(value00 = value0, value1);
 };

}

function attrConstantNS$1(fullname, interpolate$$1, value1) {

 var value00,
     interpolate0;
 return function() {
   var value0 = this.getAttributeNS(fullname.space, fullname.local);
   return value0 === value1 ? null
       : value0 === value00 ? interpolate0
       : interpolate0 = interpolate$$1(value00 = value0, value1);
 };

}

function attrFunction$1(name, interpolate$$1, value) {

 var value00,
     value10,
     interpolate0;
 return function() {
   var value0, value1 = value(this);
   if (value1 == null) return void this.removeAttribute(name);
   value0 = this.getAttribute(name);
   return value0 === value1 ? null
       : value0 === value00 && value1 === value10 ? interpolate0
       : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
 };

}

function attrFunctionNS$1(fullname, interpolate$$1, value) {

 var value00,
     value10,
     interpolate0;
 return function() {
   var value0, value1 = value(this);
   if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
   value0 = this.getAttributeNS(fullname.space, fullname.local);
   return value0 === value1 ? null
       : value0 === value00 && value1 === value10 ? interpolate0
       : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
 };

}

var transition_attr = function(name, value) {

 var fullname = namespace(name), i = fullname === "transform" ? interpolateTransformSvg : interpolate;
 return this.attrTween(name, typeof value === "function"
     ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value))
     : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname)
     : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value + ""));

};

function attrTweenNS(fullname, value) {

 function tween() {
   var node = this, i = value.apply(node, arguments);
   return i && function(t) {
     node.setAttributeNS(fullname.space, fullname.local, i(t));
   };
 }
 tween._value = value;
 return tween;

}

function attrTween(name, value) {

 function tween() {
   var node = this, i = value.apply(node, arguments);
   return i && function(t) {
     node.setAttribute(name, i(t));
   };
 }
 tween._value = value;
 return tween;

}

var transition_attrTween = function(name, value) {

 var key = "attr." + name;
 if (arguments.length < 2) return (key = this.tween(key)) && key._value;
 if (value == null) return this.tween(key, null);
 if (typeof value !== "function") throw new Error;
 var fullname = namespace(name);
 return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));

};

function delayFunction(id, value) {

 return function() {
   init(this, id).delay = +value.apply(this, arguments);
 };

}

function delayConstant(id, value) {

 return value = +value, function() {
   init(this, id).delay = value;
 };

}

var transition_delay = function(value) {

 var id = this._id;

 return arguments.length
     ? this.each((typeof value === "function"
         ? delayFunction
         : delayConstant)(id, value))
     : get$1(this.node(), id).delay;

};

function durationFunction(id, value) {

 return function() {
   set$1(this, id).duration = +value.apply(this, arguments);
 };

}

function durationConstant(id, value) {

 return value = +value, function() {
   set$1(this, id).duration = value;
 };

}

var transition_duration = function(value) {

 var id = this._id;

 return arguments.length
     ? this.each((typeof value === "function"
         ? durationFunction
         : durationConstant)(id, value))
     : get$1(this.node(), id).duration;

};

function easeConstant(id, value) {

 if (typeof value !== "function") throw new Error;
 return function() {
   set$1(this, id).ease = value;
 };

}

var transition_ease = function(value) {

 var id = this._id;

 return arguments.length
     ? this.each(easeConstant(id, value))
     : get$1(this.node(), id).ease;

};

var transition_filter = function(match) {

 if (typeof match !== "function") match = matcher$1(match);

 for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
   for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
     if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
       subgroup.push(node);
     }
   }
 }

 return new Transition(subgroups, this._parents, this._name, this._id);

};

var transition_merge = function(transition$$1) {

 if (transition$$1._id !== this._id) throw new Error;

 for (var groups0 = this._groups, groups1 = transition$$1._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
   for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
     if (node = group0[i] || group1[i]) {
       merge[i] = node;
     }
   }
 }

 for (; j < m0; ++j) {
   merges[j] = groups0[j];
 }

 return new Transition(merges, this._parents, this._name, this._id);

};

function start(name) {

 return (name + "").trim().split(/^|\s+/).every(function(t) {
   var i = t.indexOf(".");
   if (i >= 0) t = t.slice(0, i);
   return !t || t === "start";
 });

}

function onFunction(id, name, listener) {

 var on0, on1, sit = start(name) ? init : set$1;
 return function() {
   var schedule$$1 = sit(this, id),
       on = schedule$$1.on;

   // If this node shared a dispatch with the previous node,
   // just assign the updated shared dispatch and we’re done!
   // Otherwise, copy-on-write.
   if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);

   schedule$$1.on = on1;
 };

}

var transition_on = function(name, listener) {

 var id = this._id;

 return arguments.length < 2
     ? get$1(this.node(), id).on.on(name)
     : this.each(onFunction(id, name, listener));

};

function removeFunction(id) {

 return function() {
   var parent = this.parentNode;
   for (var i in this.__transition) if (+i !== id) return;
   if (parent) parent.removeChild(this);
 };

}

var transition_remove = function() {

 return this.on("end.remove", removeFunction(this._id));

};

var transition_select = function(select) {

 var name = this._name,
     id = this._id;

 if (typeof select !== "function") select = selector(select);

 for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
   for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
     if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
       if ("__data__" in node) subnode.__data__ = node.__data__;
       subgroup[i] = subnode;
       schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
     }
   }
 }

 return new Transition(subgroups, this._parents, name, id);

};

var transition_selectAll = function(select) {

 var name = this._name,
     id = this._id;

 if (typeof select !== "function") select = selectorAll(select);

 for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
   for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
     if (node = group[i]) {
       for (var children = select.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
         if (child = children[k]) {
           schedule(child, name, id, k, children, inherit);
         }
       }
       subgroups.push(children);
       parents.push(node);
     }
   }
 }

 return new Transition(subgroups, parents, name, id);

};

var Selection$1 = selection.prototype.constructor;

var transition_selection = function() {

 return new Selection$1(this._groups, this._parents);

};

function styleRemove$1(name, interpolate$$1) {

 var value00,
     value10,
     interpolate0;
 return function() {
   var value0 = styleValue(this, name),
       value1 = (this.style.removeProperty(name), styleValue(this, name));
   return value0 === value1 ? null
       : value0 === value00 && value1 === value10 ? interpolate0
       : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
 };

}

function styleRemoveEnd(name) {

 return function() {
   this.style.removeProperty(name);
 };

}

function styleConstant$1(name, interpolate$$1, value1) {

 var value00,
     interpolate0;
 return function() {
   var value0 = styleValue(this, name);
   return value0 === value1 ? null
       : value0 === value00 ? interpolate0
       : interpolate0 = interpolate$$1(value00 = value0, value1);
 };

}

function styleFunction$1(name, interpolate$$1, value) {

 var value00,
     value10,
     interpolate0;
 return function() {
   var value0 = styleValue(this, name),
       value1 = value(this);
   if (value1 == null) value1 = (this.style.removeProperty(name), styleValue(this, name));
   return value0 === value1 ? null
       : value0 === value00 && value1 === value10 ? interpolate0
       : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
 };

}

var transition_style = function(name, value, priority) {

 var i = (name += "") === "transform" ? interpolateTransformCss : interpolate;
 return value == null ? this
         .styleTween(name, styleRemove$1(name, i))
         .on("end.style." + name, styleRemoveEnd(name))
     : this.styleTween(name, typeof value === "function"
         ? styleFunction$1(name, i, tweenValue(this, "style." + name, value))
         : styleConstant$1(name, i, value + ""), priority);

};

function styleTween(name, value, priority) {

 function tween() {
   var node = this, i = value.apply(node, arguments);
   return i && function(t) {
     node.style.setProperty(name, i(t), priority);
   };
 }
 tween._value = value;
 return tween;

}

var transition_styleTween = function(name, value, priority) {

 var key = "style." + (name += "");
 if (arguments.length < 2) return (key = this.tween(key)) && key._value;
 if (value == null) return this.tween(key, null);
 if (typeof value !== "function") throw new Error;
 return this.tween(key, styleTween(name, value, priority == null ? "" : priority));

};

function textConstant$1(value) {

 return function() {
   this.textContent = value;
 };

}

function textFunction$1(value) {

 return function() {
   var value1 = value(this);
   this.textContent = value1 == null ? "" : value1;
 };

}

var transition_text = function(value) {

 return this.tween("text", typeof value === "function"
     ? textFunction$1(tweenValue(this, "text", value))
     : textConstant$1(value == null ? "" : value + ""));

};

var transition_transition = function() {

 var name = this._name,
     id0 = this._id,
     id1 = newId();

 for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
   for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
     if (node = group[i]) {
       var inherit = get$1(node, id0);
       schedule(node, name, id1, i, group, {
         time: inherit.time + inherit.delay + inherit.duration,
         delay: 0,
         duration: inherit.duration,
         ease: inherit.ease
       });
     }
   }
 }

 return new Transition(groups, this._parents, name, id1);

};

var id = 0;

function Transition(groups, parents, name, id) {

 this._groups = groups;
 this._parents = parents;
 this._name = name;
 this._id = id;

}

function transition(name) {

 return selection().transition(name);

}

function newId() {

 return ++id;

}

var selection_prototype = selection.prototype;

Transition.prototype = transition.prototype = {

 constructor: Transition,
 select: transition_select,
 selectAll: transition_selectAll,
 filter: transition_filter,
 merge: transition_merge,
 selection: transition_selection,
 transition: transition_transition,
 call: selection_prototype.call,
 nodes: selection_prototype.nodes,
 node: selection_prototype.node,
 size: selection_prototype.size,
 empty: selection_prototype.empty,
 each: selection_prototype.each,
 on: transition_on,
 attr: transition_attr,
 attrTween: transition_attrTween,
 style: transition_style,
 styleTween: transition_styleTween,
 text: transition_text,
 remove: transition_remove,
 tween: transition_tween,
 delay: transition_delay,
 duration: transition_duration,
 ease: transition_ease

};

function linear$1(t) {

 return +t;

}

function quadIn(t) {

 return t * t;

}

function quadOut(t) {

 return t * (2 - t);

}

function quadInOut(t) {

 return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2;

}

function cubicIn(t) {

 return t * t * t;

}

function cubicOut(t) {

 return --t * t * t + 1;

}

function cubicInOut(t) {

 return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;

}

var exponent = 3;

var polyIn = (function custom(e) {

 e = +e;

 function polyIn(t) {
   return Math.pow(t, e);
 }

 polyIn.exponent = custom;

 return polyIn;

})(exponent);

var polyOut = (function custom(e) {

 e = +e;

 function polyOut(t) {
   return 1 - Math.pow(1 - t, e);
 }

 polyOut.exponent = custom;

 return polyOut;

})(exponent);

var polyInOut = (function custom(e) {

 e = +e;

 function polyInOut(t) {
   return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2;
 }

 polyInOut.exponent = custom;

 return polyInOut;

})(exponent);

var pi = Math.PI; var halfPi = pi / 2;

function sinIn(t) {

 return 1 - Math.cos(t * halfPi);

}

function sinOut(t) {

 return Math.sin(t * halfPi);

}

function sinInOut(t) {

 return (1 - Math.cos(pi * t)) / 2;

}

function expIn(t) {

 return Math.pow(2, 10 * t - 10);

}

function expOut(t) {

 return 1 - Math.pow(2, -10 * t);

}

function expInOut(t) {

 return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2;

}

function circleIn(t) {

 return 1 - Math.sqrt(1 - t * t);

}

function circleOut(t) {

 return Math.sqrt(1 - --t * t);

}

function circleInOut(t) {

 return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;

}

var b1 = 4 / 11; var b2 = 6 / 11; var b3 = 8 / 11; var b4 = 3 / 4; var b5 = 9 / 11; var b6 = 10 / 11; var b7 = 15 / 16; var b8 = 21 / 22; var b9 = 63 / 64; var b0 = 1 / b1 / b1;

function bounceIn(t) {

 return 1 - bounceOut(1 - t);

}

function bounceOut(t) {

 return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9;

}

function bounceInOut(t) {

 return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2;

}

var overshoot = 1.70158;

var backIn = (function custom(s) {

 s = +s;

 function backIn(t) {
   return t * t * ((s + 1) * t - s);
 }

 backIn.overshoot = custom;

 return backIn;

})(overshoot);

var backOut = (function custom(s) {

 s = +s;

 function backOut(t) {
   return --t * t * ((s + 1) * t + s) + 1;
 }

 backOut.overshoot = custom;

 return backOut;

})(overshoot);

var backInOut = (function custom(s) {

 s = +s;

 function backInOut(t) {
   return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;
 }

 backInOut.overshoot = custom;

 return backInOut;

})(overshoot);

var tau = 2 * Math.PI; var amplitude = 1; var period = 0.3;

var elasticIn = (function custom(a, p) {

 var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

 function elasticIn(t) {
   return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p);
 }

 elasticIn.amplitude = function(a) { return custom(a, p * tau); };
 elasticIn.period = function(p) { return custom(a, p); };

 return elasticIn;

})(amplitude, period);

var elasticOut = (function custom(a, p) {

 var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

 function elasticOut(t) {
   return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p);
 }

 elasticOut.amplitude = function(a) { return custom(a, p * tau); };
 elasticOut.period = function(p) { return custom(a, p); };

 return elasticOut;

})(amplitude, period);

var elasticInOut = (function custom(a, p) {

 var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

 function elasticInOut(t) {
   return ((t = t * 2 - 1) < 0
       ? a * Math.pow(2, 10 * t) * Math.sin((s - t) / p)
       : 2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2;
 }

 elasticInOut.amplitude = function(a) { return custom(a, p * tau); };
 elasticInOut.period = function(p) { return custom(a, p); };

 return elasticInOut;

})(amplitude, period);

var defaultTiming = {

 time: null, // Set on use.
 delay: 0,
 duration: 250,
 ease: cubicInOut

};

function inherit(node, id) {

 var timing;
 while (!(timing = node.__transition) || !(timing = timing[id])) {
   if (!(node = node.parentNode)) {
     return defaultTiming.time = now(), defaultTiming;
   }
 }
 return timing;

}

var selection_transition = function(name) {

 var id,
     timing;

 if (name instanceof Transition) {
   id = name._id, name = name._name;
 } else {
   id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
 }

 for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
   for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
     if (node = group[i]) {
       schedule(node, name, id, i, group, timing || inherit(node, id));
     }
   }
 }

 return new Transition(groups, this._parents, name, id);

};

selection.prototype.interrupt = selection_interrupt; selection.prototype.transition = selection_transition;

var root$1 = [null];

var active = function(node, name) {

 var schedules = node.__transition,
     schedule$$1,
     i;

 if (schedules) {
   name = name == null ? null : name + "";
   for (i in schedules) {
     if ((schedule$$1 = schedules[i]).state > SCHEDULED && schedule$$1.name === name) {
       return new Transition(node, root$1, name, +i);
     }
   }
 }

 return null;

};

var constant$4 = function(x) {

 return function() {
   return x;
 };

};

var BrushEvent = function(target, type, selection) {

 this.target = target;
 this.type = type;
 this.selection = selection;

};

function nopropagation$1() {

 exports.event.stopImmediatePropagation();

}

var noevent$1 = function() {

 exports.event.preventDefault();
 exports.event.stopImmediatePropagation();

};

var MODE_DRAG = {name: "drag"}; var MODE_SPACE = {name: "space"}; var MODE_HANDLE = {name: "handle"}; var MODE_CENTER = {name: "center"};

var X = {

 name: "x",
 handles: ["e", "w"].map(type),
 input: function(x, e) { return x && [[x[0], e[0][1]], [x[1], e[1][1]]]; },
 output: function(xy) { return xy && [xy[0][0], xy[1][0]]; }

};

var Y = {

 name: "y",
 handles: ["n", "s"].map(type),
 input: function(y, e) { return y && [[e[0][0], y[0]], [e[1][0], y[1]]]; },
 output: function(xy) { return xy && [xy[0][1], xy[1][1]]; }

};

var XY = {

 name: "xy",
 handles: ["n", "e", "s", "w", "nw", "ne", "se", "sw"].map(type),
 input: function(xy) { return xy; },
 output: function(xy) { return xy; }

};

var cursors = {

 overlay: "crosshair",
 selection: "move",
 n: "ns-resize",
 e: "ew-resize",
 s: "ns-resize",
 w: "ew-resize",
 nw: "nwse-resize",
 ne: "nesw-resize",
 se: "nwse-resize",
 sw: "nesw-resize"

};

var flipX = {

 e: "w",
 w: "e",
 nw: "ne",
 ne: "nw",
 se: "sw",
 sw: "se"

};

var flipY = {

 n: "s",
 s: "n",
 nw: "sw",
 ne: "se",
 se: "ne",
 sw: "nw"

};

var signsX = {

 overlay: +1,
 selection: +1,
 n: null,
 e: +1,
 s: null,
 w: -1,
 nw: -1,
 ne: +1,
 se: +1,
 sw: -1

};

var signsY = {

 overlay: +1,
 selection: +1,
 n: -1,
 e: null,
 s: +1,
 w: null,
 nw: -1,
 ne: -1,
 se: +1,
 sw: +1

};

function type(t) {

 return {type: t};

}

// Ignore right-click, since that should open the context menu. function defaultFilter() {

 return !exports.event.button;

}

function defaultExtent() {

 var svg = this.ownerSVGElement || this;
 return [[0, 0], [svg.width.baseVal.value, svg.height.baseVal.value]];

}

// Like d3.local, but with the name “__brush” rather than auto-generated. function local(node) {

 while (!node.__brush) if (!(node = node.parentNode)) return;
 return node.__brush;

}

function empty(extent) {

 return extent[0][0] === extent[1][0]
     || extent[0][1] === extent[1][1];

}

function brushSelection(node) {

 var state = node.__brush;
 return state ? state.dim.output(state.selection) : null;

}

function brushX() {

 return brush$1(X);

}

function brushY() {

 return brush$1(Y);

}

var brush = function() {

 return brush$1(XY);

};

function brush$1(dim) {

 var extent = defaultExtent,
     filter = defaultFilter,
     listeners = dispatch(brush, "start", "brush", "end"),
     handleSize = 6,
     touchending;

 function brush(group) {
   var overlay = group
       .property("__brush", initialize)
     .selectAll(".overlay")
     .data([type("overlay")]);

   overlay.enter().append("rect")
       .attr("class", "overlay")
       .attr("pointer-events", "all")
       .attr("cursor", cursors.overlay)
     .merge(overlay)
       .each(function() {
         var extent = local(this).extent;
         select(this)
             .attr("x", extent[0][0])
             .attr("y", extent[0][1])
             .attr("width", extent[1][0] - extent[0][0])
             .attr("height", extent[1][1] - extent[0][1]);
       });

   group.selectAll(".selection")
     .data([type("selection")])
     .enter().append("rect")
       .attr("class", "selection")
       .attr("cursor", cursors.selection)
       .attr("fill", "#777")
       .attr("fill-opacity", 0.3)
       .attr("stroke", "#fff")
       .attr("shape-rendering", "crispEdges");

   var handle = group.selectAll(".handle")
     .data(dim.handles, function(d) { return d.type; });

   handle.exit().remove();

   handle.enter().append("rect")
       .attr("class", function(d) { return "handle handle--" + d.type; })
       .attr("cursor", function(d) { return cursors[d.type]; });

   group
       .each(redraw)
       .attr("fill", "none")
       .attr("pointer-events", "all")
       .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)")
       .on("mousedown.brush touchstart.brush", started);
 }

 brush.move = function(group, selection) {
   if (group.selection) {
     group
         .on("start.brush", function() { emitter(this, arguments).beforestart().start(); })
         .on("interrupt.brush end.brush", function() { emitter(this, arguments).end(); })
         .tween("brush", function() {
           var that = this,
               state = that.__brush,
               emit = emitter(that, arguments),
               selection0 = state.selection,
               selection1 = dim.input(typeof selection === "function" ? selection.apply(this, arguments) : selection, state.extent),
               i = interpolateValue(selection0, selection1);

           function tween(t) {
             state.selection = t === 1 && empty(selection1) ? null : i(t);
             redraw.call(that);
             emit.brush();
           }

           return selection0 && selection1 ? tween : tween(1);
         });
   } else {
     group
         .each(function() {
           var that = this,
               args = arguments,
               state = that.__brush,
               selection1 = dim.input(typeof selection === "function" ? selection.apply(that, args) : selection, state.extent),
               emit = emitter(that, args).beforestart();

           interrupt(that);
           state.selection = selection1 == null || empty(selection1) ? null : selection1;
           redraw.call(that);
           emit.start().brush().end();
         });
   }
 };

 function redraw() {
   var group = select(this),
       selection = local(this).selection;

   if (selection) {
     group.selectAll(".selection")
         .style("display", null)
         .attr("x", selection[0][0])
         .attr("y", selection[0][1])
         .attr("width", selection[1][0] - selection[0][0])
         .attr("height", selection[1][1] - selection[0][1]);

     group.selectAll(".handle")
         .style("display", null)
         .attr("x", function(d) { return d.type[d.type.length - 1] === "e" ? selection[1][0] - handleSize / 2 : selection[0][0] - handleSize / 2; })
         .attr("y", function(d) { return d.type[0] === "s" ? selection[1][1] - handleSize / 2 : selection[0][1] - handleSize / 2; })
         .attr("width", function(d) { return d.type === "n" || d.type === "s" ? selection[1][0] - selection[0][0] + handleSize : handleSize; })
         .attr("height", function(d) { return d.type === "e" || d.type === "w" ? selection[1][1] - selection[0][1] + handleSize : handleSize; });
   }

   else {
     group.selectAll(".selection,.handle")
         .style("display", "none")
         .attr("x", null)
         .attr("y", null)
         .attr("width", null)
         .attr("height", null);
   }
 }

 function emitter(that, args) {
   return that.__brush.emitter || new Emitter(that, args);
 }

 function Emitter(that, args) {
   this.that = that;
   this.args = args;
   this.state = that.__brush;
   this.active = 0;
 }

 Emitter.prototype = {
   beforestart: function() {
     if (++this.active === 1) this.state.emitter = this, this.starting = true;
     return this;
   },
   start: function() {
     if (this.starting) this.starting = false, this.emit("start");
     return this;
   },
   brush: function() {
     this.emit("brush");
     return this;
   },
   end: function() {
     if (--this.active === 0) delete this.state.emitter, this.emit("end");
     return this;
   },
   emit: function(type) {
     customEvent(new BrushEvent(brush, type, dim.output(this.state.selection)), listeners.apply, listeners, [type, this.that, this.args]);
   }
 };

 function started() {
   if (exports.event.touches) { if (exports.event.changedTouches.length < exports.event.touches.length) return noevent$1(); }
   else if (touchending) return;
   if (!filter.apply(this, arguments)) return;

   var that = this,
       type = exports.event.target.__data__.type,
       mode = (exports.event.metaKey ? type = "overlay" : type) === "selection" ? MODE_DRAG : (exports.event.altKey ? MODE_CENTER : MODE_HANDLE),
       signX = dim === Y ? null : signsX[type],
       signY = dim === X ? null : signsY[type],
       state = local(that),
       extent = state.extent,
       selection = state.selection,
       W = extent[0][0], w0, w1,
       N = extent[0][1], n0, n1,
       E = extent[1][0], e0, e1,
       S = extent[1][1], s0, s1,
       dx,
       dy,
       moving,
       shifting = signX && signY && exports.event.shiftKey,
       lockX,
       lockY,
       point0 = mouse(that),
       point = point0,
       emit = emitter(that, arguments).beforestart();

   if (type === "overlay") {
     state.selection = selection = [
       [w0 = dim === Y ? W : point0[0], n0 = dim === X ? N : point0[1]],
       [e0 = dim === Y ? E : w0, s0 = dim === X ? S : n0]
     ];
   } else {
     w0 = selection[0][0];
     n0 = selection[0][1];
     e0 = selection[1][0];
     s0 = selection[1][1];
   }

   w1 = w0;
   n1 = n0;
   e1 = e0;
   s1 = s0;

   var group = select(that)
       .attr("pointer-events", "none");

   var overlay = group.selectAll(".overlay")
       .attr("cursor", cursors[type]);

   if (exports.event.touches) {
     group
         .on("touchmove.brush", moved, true)
         .on("touchend.brush touchcancel.brush", ended, true);
   } else {
     var view = select(exports.event.view)
         .on("keydown.brush", keydowned, true)
         .on("keyup.brush", keyupped, true)
         .on("mousemove.brush", moved, true)
         .on("mouseup.brush", ended, true);

     dragDisable(exports.event.view);
   }

   nopropagation$1();
   interrupt(that);
   redraw.call(that);
   emit.start();

   function moved() {
     var point1 = mouse(that);
     if (shifting && !lockX && !lockY) {
       if (Math.abs(point1[0] - point[0]) > Math.abs(point1[1] - point[1])) lockY = true;
       else lockX = true;
     }
     point = point1;
     moving = true;
     noevent$1();
     move();
   }

   function move() {
     var t;

     dx = point[0] - point0[0];
     dy = point[1] - point0[1];

     switch (mode) {
       case MODE_SPACE:
       case MODE_DRAG: {
         if (signX) dx = Math.max(W - w0, Math.min(E - e0, dx)), w1 = w0 + dx, e1 = e0 + dx;
         if (signY) dy = Math.max(N - n0, Math.min(S - s0, dy)), n1 = n0 + dy, s1 = s0 + dy;
         break;
       }
       case MODE_HANDLE: {
         if (signX < 0) dx = Math.max(W - w0, Math.min(E - w0, dx)), w1 = w0 + dx, e1 = e0;
         else if (signX > 0) dx = Math.max(W - e0, Math.min(E - e0, dx)), w1 = w0, e1 = e0 + dx;
         if (signY < 0) dy = Math.max(N - n0, Math.min(S - n0, dy)), n1 = n0 + dy, s1 = s0;
         else if (signY > 0) dy = Math.max(N - s0, Math.min(S - s0, dy)), n1 = n0, s1 = s0 + dy;
         break;
       }
       case MODE_CENTER: {
         if (signX) w1 = Math.max(W, Math.min(E, w0 - dx * signX)), e1 = Math.max(W, Math.min(E, e0 + dx * signX));
         if (signY) n1 = Math.max(N, Math.min(S, n0 - dy * signY)), s1 = Math.max(N, Math.min(S, s0 + dy * signY));
         break;
       }
     }

     if (e1 < w1) {
       signX *= -1;
       t = w0, w0 = e0, e0 = t;
       t = w1, w1 = e1, e1 = t;
       if (type in flipX) overlay.attr("cursor", cursors[type = flipX[type]]);
     }

     if (s1 < n1) {
       signY *= -1;
       t = n0, n0 = s0, s0 = t;
       t = n1, n1 = s1, s1 = t;
       if (type in flipY) overlay.attr("cursor", cursors[type = flipY[type]]);
     }

     if (state.selection) selection = state.selection; // May be set by brush.move!
     if (lockX) w1 = selection[0][0], e1 = selection[1][0];
     if (lockY) n1 = selection[0][1], s1 = selection[1][1];

     if (selection[0][0] !== w1
         || selection[0][1] !== n1
         || selection[1][0] !== e1
         || selection[1][1] !== s1) {
       state.selection = [[w1, n1], [e1, s1]];
       redraw.call(that);
       emit.brush();
     }
   }

   function ended() {
     nopropagation$1();
     if (exports.event.touches) {
       if (exports.event.touches.length) return;
       if (touchending) clearTimeout(touchending);
       touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
       group.on("touchmove.brush touchend.brush touchcancel.brush", null);
     } else {
       yesdrag(exports.event.view, moving);
       view.on("keydown.brush keyup.brush mousemove.brush mouseup.brush", null);
     }
     group.attr("pointer-events", "all");
     overlay.attr("cursor", cursors.overlay);
     if (state.selection) selection = state.selection; // May be set by brush.move (on start)!
     if (empty(selection)) state.selection = null, redraw.call(that);
     emit.end();
   }

   function keydowned() {
     switch (exports.event.keyCode) {
       case 16: { // SHIFT
         shifting = signX && signY;
         break;
       }
       case 18: { // ALT
         if (mode === MODE_HANDLE) {
           if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;
           if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;
           mode = MODE_CENTER;
           move();
         }
         break;
       }
       case 32: { // SPACE; takes priority over ALT
         if (mode === MODE_HANDLE || mode === MODE_CENTER) {
           if (signX < 0) e0 = e1 - dx; else if (signX > 0) w0 = w1 - dx;
           if (signY < 0) s0 = s1 - dy; else if (signY > 0) n0 = n1 - dy;
           mode = MODE_SPACE;
           overlay.attr("cursor", cursors.selection);
           move();
         }
         break;
       }
       default: return;
     }
     noevent$1();
   }

   function keyupped() {
     switch (exports.event.keyCode) {
       case 16: { // SHIFT
         if (shifting) {
           lockX = lockY = shifting = false;
           move();
         }
         break;
       }
       case 18: { // ALT
         if (mode === MODE_CENTER) {
           if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;
           if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;
           mode = MODE_HANDLE;
           move();
         }
         break;
       }
       case 32: { // SPACE
         if (mode === MODE_SPACE) {
           if (exports.event.altKey) {
             if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;
             if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;
             mode = MODE_CENTER;
           } else {
             if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;
             if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;
             mode = MODE_HANDLE;
           }
           overlay.attr("cursor", cursors[type]);
           move();
         }
         break;
       }
       default: return;
     }
     noevent$1();
   }
 }

 function initialize() {
   var state = this.__brush || {selection: null};
   state.extent = extent.apply(this, arguments);
   state.dim = dim;
   return state;
 }

 brush.extent = function(_) {
   return arguments.length ? (extent = typeof _ === "function" ? _ : constant$4([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), brush) : extent;
 };

 brush.filter = function(_) {
   return arguments.length ? (filter = typeof _ === "function" ? _ : constant$4(!!_), brush) : filter;
 };

 brush.handleSize = function(_) {
   return arguments.length ? (handleSize = +_, brush) : handleSize;
 };

 brush.on = function() {
   var value = listeners.on.apply(listeners, arguments);
   return value === listeners ? brush : value;
 };

 return brush;

}

var cos = Math.cos; var sin = Math.sin; var pi$1 = Math.PI; var halfPi$1 = pi$1 / 2; var tau$1 = pi$1 * 2; var max$1 = Math.max;

function compareValue(compare) {

 return function(a, b) {
   return compare(
     a.source.value + a.target.value,
     b.source.value + b.target.value
   );
 };

}

var chord = function() {

 var padAngle = 0,
     sortGroups = null,
     sortSubgroups = null,
     sortChords = null;

 function chord(matrix) {
   var n = matrix.length,
       groupSums = [],
       groupIndex = sequence(n),
       subgroupIndex = [],
       chords = [],
       groups = chords.groups = new Array(n),
       subgroups = new Array(n * n),
       k,
       x,
       x0,
       dx,
       i,
       j;

   // Compute the sum.
   k = 0, i = -1; while (++i < n) {
     x = 0, j = -1; while (++j < n) {
       x += matrix[i][j];
     }
     groupSums.push(x);
     subgroupIndex.push(sequence(n));
     k += x;
   }

   // Sort groups…
   if (sortGroups) groupIndex.sort(function(a, b) {
     return sortGroups(groupSums[a], groupSums[b]);
   });

   // Sort subgroups…
   if (sortSubgroups) subgroupIndex.forEach(function(d, i) {
     d.sort(function(a, b) {
       return sortSubgroups(matrix[i][a], matrix[i][b]);
     });
   });

   // Convert the sum to scaling factor for [0, 2pi].
   // TODO Allow start and end angle to be specified?
   // TODO Allow padding to be specified as percentage?
   k = max$1(0, tau$1 - padAngle * n) / k;
   dx = k ? padAngle : tau$1 / n;

   // Compute the start and end angle for each group and subgroup.
   // Note: Opera has a bug reordering object literal properties!
   x = 0, i = -1; while (++i < n) {
     x0 = x, j = -1; while (++j < n) {
       var di = groupIndex[i],
           dj = subgroupIndex[di][j],
           v = matrix[di][dj],
           a0 = x,
           a1 = x += v * k;
       subgroups[dj * n + di] = {
         index: di,
         subindex: dj,
         startAngle: a0,
         endAngle: a1,
         value: v
       };
     }
     groups[di] = {
       index: di,
       startAngle: x0,
       endAngle: x,
       value: groupSums[di]
     };
     x += dx;
   }

   // Generate chords for each (non-empty) subgroup-subgroup link.
   i = -1; while (++i < n) {
     j = i - 1; while (++j < n) {
       var source = subgroups[j * n + i],
           target = subgroups[i * n + j];
       if (source.value || target.value) {
         chords.push(source.value < target.value
             ? {source: target, target: source}
             : {source: source, target: target});
       }
     }
   }

   return sortChords ? chords.sort(sortChords) : chords;
 }

 chord.padAngle = function(_) {
   return arguments.length ? (padAngle = max$1(0, _), chord) : padAngle;
 };

 chord.sortGroups = function(_) {
   return arguments.length ? (sortGroups = _, chord) : sortGroups;
 };

 chord.sortSubgroups = function(_) {
   return arguments.length ? (sortSubgroups = _, chord) : sortSubgroups;
 };

 chord.sortChords = function(_) {
   return arguments.length ? (_ == null ? sortChords = null : (sortChords = compareValue(_))._ = _, chord) : sortChords && sortChords._;
 };

 return chord;

};

var slice$2 = Array.prototype.slice;

var constant$5 = function(x) {

 return function() {
   return x;
 };

};

var pi$2 = Math.PI; var tau$2 = 2 * pi$2; var epsilon$1 = 1e-6; var tauEpsilon = tau$2 - epsilon$1;

function Path() {

 this._x0 = this._y0 = // start of current subpath
 this._x1 = this._y1 = null; // end of current subpath
 this._ = "";

}

function path() {

 return new Path;

}

Path.prototype = path.prototype = {

 constructor: Path,
 moveTo: function(x, y) {
   this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y);
 },
 closePath: function() {
   if (this._x1 !== null) {
     this._x1 = this._x0, this._y1 = this._y0;
     this._ += "Z";
   }
 },
 lineTo: function(x, y) {
   this._ += "L" + (this._x1 = +x) + "," + (this._y1 = +y);
 },
 quadraticCurveTo: function(x1, y1, x, y) {
   this._ += "Q" + (+x1) + "," + (+y1) + "," + (this._x1 = +x) + "," + (this._y1 = +y);
 },
 bezierCurveTo: function(x1, y1, x2, y2, x, y) {
   this._ += "C" + (+x1) + "," + (+y1) + "," + (+x2) + "," + (+y2) + "," + (this._x1 = +x) + "," + (this._y1 = +y);
 },
 arcTo: function(x1, y1, x2, y2, r) {
   x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;
   var x0 = this._x1,
       y0 = this._y1,
       x21 = x2 - x1,
       y21 = y2 - y1,
       x01 = x0 - x1,
       y01 = y0 - y1,
       l01_2 = x01 * x01 + y01 * y01;

   // Is the radius negative? Error.
   if (r < 0) throw new Error("negative radius: " + r);

   // Is this path empty? Move to (x1,y1).
   if (this._x1 === null) {
     this._ += "M" + (this._x1 = x1) + "," + (this._y1 = y1);
   }

   // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.
   else if (!(l01_2 > epsilon$1)) {}

   // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?
   // Equivalently, is (x1,y1) coincident with (x2,y2)?
   // Or, is the radius zero? Line to (x1,y1).
   else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon$1) || !r) {
     this._ += "L" + (this._x1 = x1) + "," + (this._y1 = y1);
   }

   // Otherwise, draw an arc!
   else {
     var x20 = x2 - x0,
         y20 = y2 - y0,
         l21_2 = x21 * x21 + y21 * y21,
         l20_2 = x20 * x20 + y20 * y20,
         l21 = Math.sqrt(l21_2),
         l01 = Math.sqrt(l01_2),
         l = r * Math.tan((pi$2 - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),
         t01 = l / l01,
         t21 = l / l21;

     // If the start tangent is not coincident with (x0,y0), line to.
     if (Math.abs(t01 - 1) > epsilon$1) {
       this._ += "L" + (x1 + t01 * x01) + "," + (y1 + t01 * y01);
     }

     this._ += "A" + r + "," + r + ",0,0," + (+(y01 * x20 > x01 * y20)) + "," + (this._x1 = x1 + t21 * x21) + "," + (this._y1 = y1 + t21 * y21);
   }
 },
 arc: function(x, y, r, a0, a1, ccw) {
   x = +x, y = +y, r = +r;
   var dx = r * Math.cos(a0),
       dy = r * Math.sin(a0),
       x0 = x + dx,
       y0 = y + dy,
       cw = 1 ^ ccw,
       da = ccw ? a0 - a1 : a1 - a0;

   // Is the radius negative? Error.
   if (r < 0) throw new Error("negative radius: " + r);

   // Is this path empty? Move to (x0,y0).
   if (this._x1 === null) {
     this._ += "M" + x0 + "," + y0;
   }

   // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).
   else if (Math.abs(this._x1 - x0) > epsilon$1 || Math.abs(this._y1 - y0) > epsilon$1) {
     this._ += "L" + x0 + "," + y0;
   }

   // Is this arc empty? We’re done.
   if (!r) return;

   // Does the angle go the wrong way? Flip the direction.
   if (da < 0) da = da % tau$2 + tau$2;

   // Is this a complete circle? Draw two arcs to complete the circle.
   if (da > tauEpsilon) {
     this._ += "A" + r + "," + r + ",0,1," + cw + "," + (x - dx) + "," + (y - dy) + "A" + r + "," + r + ",0,1," + cw + "," + (this._x1 = x0) + "," + (this._y1 = y0);
   }

   // Is this arc non-empty? Draw an arc!
   else if (da > epsilon$1) {
     this._ += "A" + r + "," + r + ",0," + (+(da >= pi$2)) + "," + cw + "," + (this._x1 = x + r * Math.cos(a1)) + "," + (this._y1 = y + r * Math.sin(a1));
   }
 },
 rect: function(x, y, w, h) {
   this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y) + "h" + (+w) + "v" + (+h) + "h" + (-w) + "Z";
 },
 toString: function() {
   return this._;
 }

};

function defaultSource(d) {

 return d.source;

}

function defaultTarget(d) {

 return d.target;

}

function defaultRadius(d) {

 return d.radius;

}

function defaultStartAngle(d) {

 return d.startAngle;

}

function defaultEndAngle(d) {

 return d.endAngle;

}

var ribbon = function() {

 var source = defaultSource,
     target = defaultTarget,
     radius = defaultRadius,
     startAngle = defaultStartAngle,
     endAngle = defaultEndAngle,
     context = null;

 function ribbon() {
   var buffer,
       argv = slice$2.call(arguments),
       s = source.apply(this, argv),
       t = target.apply(this, argv),
       sr = +radius.apply(this, (argv[0] = s, argv)),
       sa0 = startAngle.apply(this, argv) - halfPi$1,
       sa1 = endAngle.apply(this, argv) - halfPi$1,
       sx0 = sr * cos(sa0),
       sy0 = sr * sin(sa0),
       tr = +radius.apply(this, (argv[0] = t, argv)),
       ta0 = startAngle.apply(this, argv) - halfPi$1,
       ta1 = endAngle.apply(this, argv) - halfPi$1;

   if (!context) context = buffer = path();

   context.moveTo(sx0, sy0);
   context.arc(0, 0, sr, sa0, sa1);
   if (sa0 !== ta0 || sa1 !== ta1) { // TODO sr !== tr?
     context.quadraticCurveTo(0, 0, tr * cos(ta0), tr * sin(ta0));
     context.arc(0, 0, tr, ta0, ta1);
   }
   context.quadraticCurveTo(0, 0, sx0, sy0);
   context.closePath();

   if (buffer) return context = null, buffer + "" || null;
 }

 ribbon.radius = function(_) {
   return arguments.length ? (radius = typeof _ === "function" ? _ : constant$5(+_), ribbon) : radius;
 };

 ribbon.startAngle = function(_) {
   return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$5(+_), ribbon) : startAngle;
 };

 ribbon.endAngle = function(_) {
   return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$5(+_), ribbon) : endAngle;
 };

 ribbon.source = function(_) {
   return arguments.length ? (source = _, ribbon) : source;
 };

 ribbon.target = function(_) {
   return arguments.length ? (target = _, ribbon) : target;
 };

 ribbon.context = function(_) {
   return arguments.length ? ((context = _ == null ? null : _), ribbon) : context;
 };

 return ribbon;

};

var prefix = "$";

function Map() {}

Map.prototype = map$1.prototype = {

 constructor: Map,
 has: function(key) {
   return (prefix + key) in this;
 },
 get: function(key) {
   return this[prefix + key];
 },
 set: function(key, value) {
   this[prefix + key] = value;
   return this;
 },
 remove: function(key) {
   var property = prefix + key;
   return property in this && delete this[property];
 },
 clear: function() {
   for (var property in this) if (property[0] === prefix) delete this[property];
 },
 keys: function() {
   var keys = [];
   for (var property in this) if (property[0] === prefix) keys.push(property.slice(1));
   return keys;
 },
 values: function() {
   var values = [];
   for (var property in this) if (property[0] === prefix) values.push(this[property]);
   return values;
 },
 entries: function() {
   var entries = [];
   for (var property in this) if (property[0] === prefix) entries.push({key: property.slice(1), value: this[property]});
   return entries;
 },
 size: function() {
   var size = 0;
   for (var property in this) if (property[0] === prefix) ++size;
   return size;
 },
 empty: function() {
   for (var property in this) if (property[0] === prefix) return false;
   return true;
 },
 each: function(f) {
   for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this);
 }

};

function map$1(object, f) {

 var map = new Map;

 // Copy constructor.
 if (object instanceof Map) object.each(function(value, key) { map.set(key, value); });

 // Index array by numeric index or specified key function.
 else if (Array.isArray(object)) {
   var i = -1,
       n = object.length,
       o;

   if (f == null) while (++i < n) map.set(i, object[i]);
   else while (++i < n) map.set(f(o = object[i], i, object), o);
 }

 // Convert object to map.
 else if (object) for (var key in object) map.set(key, object[key]);

 return map;

}

var nest = function() {

 var keys = [],
     sortKeys = [],
     sortValues,
     rollup,
     nest;

 function apply(array, depth, createResult, setResult) {
   if (depth >= keys.length) {
     if (sortValues != null) array.sort(sortValues);
     return rollup != null ? rollup(array) : array;
   }

   var i = -1,
       n = array.length,
       key = keys[depth++],
       keyValue,
       value,
       valuesByKey = map$1(),
       values,
       result = createResult();

   while (++i < n) {
     if (values = valuesByKey.get(keyValue = key(value = array[i]) + "")) {
       values.push(value);
     } else {
       valuesByKey.set(keyValue, [value]);
     }
   }

   valuesByKey.each(function(values, key) {
     setResult(result, key, apply(values, depth, createResult, setResult));
   });

   return result;
 }

 function entries(map, depth) {
   if (++depth > keys.length) return map;
   var array, sortKey = sortKeys[depth - 1];
   if (rollup != null && depth >= keys.length) array = map.entries();
   else array = [], map.each(function(v, k) { array.push({key: k, values: entries(v, depth)}); });
   return sortKey != null ? array.sort(function(a, b) { return sortKey(a.key, b.key); }) : array;
 }

 return nest = {
   object: function(array) { return apply(array, 0, createObject, setObject); },
   map: function(array) { return apply(array, 0, createMap, setMap); },
   entries: function(array) { return entries(apply(array, 0, createMap, setMap), 0); },
   key: function(d) { keys.push(d); return nest; },
   sortKeys: function(order) { sortKeys[keys.length - 1] = order; return nest; },
   sortValues: function(order) { sortValues = order; return nest; },
   rollup: function(f) { rollup = f; return nest; }
 };

};

function createObject() {

 return {};

}

function setObject(object, key, value) {

 object[key] = value;

}

function createMap() {

 return map$1();

}

function setMap(map, key, value) {

 map.set(key, value);

}

function Set() {}

var proto = map$1.prototype;

Set.prototype = set$2.prototype = {

 constructor: Set,
 has: proto.has,
 add: function(value) {
   value += "";
   this[prefix + value] = value;
   return this;
 },
 remove: proto.remove,
 clear: proto.clear,
 values: proto.keys,
 size: proto.size,
 empty: proto.empty,
 each: proto.each

};

function set$2(object, f) {

 var set = new Set;

 // Copy constructor.
 if (object instanceof Set) object.each(function(value) { set.add(value); });

 // Otherwise, assume it’s an array.
 else if (object) {
   var i = -1, n = object.length;
   if (f == null) while (++i < n) set.add(object[i]);
   else while (++i < n) set.add(f(object[i], i, object));
 }

 return set;

}

var keys = function(map) {

 var keys = [];
 for (var key in map) keys.push(key);
 return keys;

};

var values = function(map) {

 var values = [];
 for (var key in map) values.push(map[key]);
 return values;

};

var entries = function(map) {

 var entries = [];
 for (var key in map) entries.push({key: key, value: map[key]});
 return entries;

};

var EOL = {}; var EOF = {}; var QUOTE = 34; var NEWLINE = 10; var RETURN = 13;

function objectConverter(columns) {

 return new Function("d", "return {" + columns.map(function(name, i) {
   return JSON.stringify(name) + ": d[" + i + "]";
 }).join(",") + "}");

}

function customConverter(columns, f) {

 var object = objectConverter(columns);
 return function(row, i) {
   return f(object(row), i, columns);
 };

}

// Compute unique columns in order of discovery. function inferColumns(rows) {

 var columnSet = Object.create(null),
     columns = [];

 rows.forEach(function(row) {
   for (var column in row) {
     if (!(column in columnSet)) {
       columns.push(columnSet[column] = column);
     }
   }
 });

 return columns;

}

var dsv = function(delimiter) {

 var reFormat = new RegExp("[\"" + delimiter + "\n\r]"),
     DELIMITER = delimiter.charCodeAt(0);

 function parse(text, f) {
   var convert, columns, rows = parseRows(text, function(row, i) {
     if (convert) return convert(row, i - 1);
     columns = row, convert = f ? customConverter(row, f) : objectConverter(row);
   });
   rows.columns = columns;
   return rows;
 }

 function parseRows(text, f) {
   var rows = [], // output rows
       N = text.length,
       I = 0, // current character index
       n = 0, // current line number
       t, // current token
       eof = N <= 0, // current token followed by EOF?
       eol = false; // current token followed by EOL?

   // Strip the trailing newline.
   if (text.charCodeAt(N - 1) === NEWLINE) --N;
   if (text.charCodeAt(N - 1) === RETURN) --N;

   function token() {
     if (eof) return EOF;
     if (eol) return eol = false, EOL;

     // Unescape quotes.
     var i, j = I, c;
     if (text.charCodeAt(j) === QUOTE) {
       while (I++ < N && text.charCodeAt(I) !== QUOTE || text.charCodeAt(++I) === QUOTE);
       if ((i = I) >= N) eof = true;
       else if ((c = text.charCodeAt(I++)) === NEWLINE) eol = true;
       else if (c === RETURN) { eol = true; if (text.charCodeAt(I) === NEWLINE) ++I; }
       return text.slice(j + 1, i - 1).replace(/""/g, "\"");
     }

     // Find next delimiter or newline.
     while (I < N) {
       if ((c = text.charCodeAt(i = I++)) === NEWLINE) eol = true;
       else if (c === RETURN) { eol = true; if (text.charCodeAt(I) === NEWLINE) ++I; }
       else if (c !== DELIMITER) continue;
       return text.slice(j, i);
     }

     // Return last token before EOF.
     return eof = true, text.slice(j, N);
   }

   while ((t = token()) !== EOF) {
     var row = [];
     while (t !== EOL && t !== EOF) row.push(t), t = token();
     if (f && (row = f(row, n++)) == null) continue;
     rows.push(row);
   }

   return rows;
 }

 function format(rows, columns) {
   if (columns == null) columns = inferColumns(rows);
   return [columns.map(formatValue).join(delimiter)].concat(rows.map(function(row) {
     return columns.map(function(column) {
       return formatValue(row[column]);
     }).join(delimiter);
   })).join("\n");
 }

 function formatRows(rows) {
   return rows.map(formatRow).join("\n");
 }

 function formatRow(row) {
   return row.map(formatValue).join(delimiter);
 }

 function formatValue(text) {
   return text == null ? ""
       : reFormat.test(text += "") ? "\"" + text.replace(/"/g, "\"\"") + "\""
       : text;
 }

 return {
   parse: parse,
   parseRows: parseRows,
   format: format,
   formatRows: formatRows
 };

};

var csv = dsv(",");

var csvParse = csv.parse; var csvParseRows = csv.parseRows; var csvFormat = csv.format; var csvFormatRows = csv.formatRows;

var tsv = dsv("\t");

var tsvParse = tsv.parse; var tsvParseRows = tsv.parseRows; var tsvFormat = tsv.format; var tsvFormatRows = tsv.formatRows;

var center$1 = function(x, y) {

 var nodes;

 if (x == null) x = 0;
 if (y == null) y = 0;

 function force() {
   var i,
       n = nodes.length,
       node,
       sx = 0,
       sy = 0;

   for (i = 0; i < n; ++i) {
     node = nodes[i], sx += node.x, sy += node.y;
   }

   for (sx = sx / n - x, sy = sy / n - y, i = 0; i < n; ++i) {
     node = nodes[i], node.x -= sx, node.y -= sy;
   }
 }

 force.initialize = function(_) {
   nodes = _;
 };

 force.x = function(_) {
   return arguments.length ? (x = +_, force) : x;
 };

 force.y = function(_) {
   return arguments.length ? (y = +_, force) : y;
 };

 return force;

};

var constant$6 = function(x) {

 return function() {
   return x;
 };

};

var jiggle = function() {

 return (Math.random() - 0.5) * 1e-6;

};

var tree_add = function(d) {

 var x = +this._x.call(null, d),
     y = +this._y.call(null, d);
 return add(this.cover(x, y), x, y, d);

};

function add(tree, x, y, d) {

 if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points

 var parent,
     node = tree._root,
     leaf = {data: d},
     x0 = tree._x0,
     y0 = tree._y0,
     x1 = tree._x1,
     y1 = tree._y1,
     xm,
     ym,
     xp,
     yp,
     right,
     bottom,
     i,
     j;

 // If the tree is empty, initialize the root as a leaf.
 if (!node) return tree._root = leaf, tree;

 // Find the existing leaf for the new point, or add it.
 while (node.length) {
   if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
   if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
   if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree;
 }

 // Is the new point is exactly coincident with the existing point?
 xp = +tree._x.call(null, node.data);
 yp = +tree._y.call(null, node.data);
 if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree;

 // Otherwise, split the leaf node until the old and new point are separated.
 do {
   parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4);
   if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
   if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
 } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm)));
 return parent[j] = node, parent[i] = leaf, tree;

}

function addAll(data) {

 var d, i, n = data.length,
     x,
     y,
     xz = new Array(n),
     yz = new Array(n),
     x0 = Infinity,
     y0 = Infinity,
     x1 = -Infinity,
     y1 = -Infinity;

 // Compute the points and their extent.
 for (i = 0; i < n; ++i) {
   if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue;
   xz[i] = x;
   yz[i] = y;
   if (x < x0) x0 = x;
   if (x > x1) x1 = x;
   if (y < y0) y0 = y;
   if (y > y1) y1 = y;
 }

 // If there were no (valid) points, inherit the existing extent.
 if (x1 < x0) x0 = this._x0, x1 = this._x1;
 if (y1 < y0) y0 = this._y0, y1 = this._y1;

 // Expand the tree to cover the new points.
 this.cover(x0, y0).cover(x1, y1);

 // Add the new points.
 for (i = 0; i < n; ++i) {
   add(this, xz[i], yz[i], data[i]);
 }

 return this;

}

var tree_cover = function(x, y) {

 if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points

 var x0 = this._x0,
     y0 = this._y0,
     x1 = this._x1,
     y1 = this._y1;

 // If the quadtree has no extent, initialize them.
 // Integer extent are necessary so that if we later double the extent,
 // the existing quadrant boundaries don’t change due to floating point error!
 if (isNaN(x0)) {
   x1 = (x0 = Math.floor(x)) + 1;
   y1 = (y0 = Math.floor(y)) + 1;
 }

 // Otherwise, double repeatedly to cover.
 else if (x0 > x || x > x1 || y0 > y || y > y1) {
   var z = x1 - x0,
       node = this._root,
       parent,
       i;

   switch (i = (y < (y0 + y1) / 2) << 1 | (x < (x0 + x1) / 2)) {
     case 0: {
       do parent = new Array(4), parent[i] = node, node = parent;
       while (z *= 2, x1 = x0 + z, y1 = y0 + z, x > x1 || y > y1);
       break;
     }
     case 1: {
       do parent = new Array(4), parent[i] = node, node = parent;
       while (z *= 2, x0 = x1 - z, y1 = y0 + z, x0 > x || y > y1);
       break;
     }
     case 2: {
       do parent = new Array(4), parent[i] = node, node = parent;
       while (z *= 2, x1 = x0 + z, y0 = y1 - z, x > x1 || y0 > y);
       break;
     }
     case 3: {
       do parent = new Array(4), parent[i] = node, node = parent;
       while (z *= 2, x0 = x1 - z, y0 = y1 - z, x0 > x || y0 > y);
       break;
     }
   }

   if (this._root && this._root.length) this._root = node;
 }

 // If the quadtree covers the point already, just return.
 else return this;

 this._x0 = x0;
 this._y0 = y0;
 this._x1 = x1;
 this._y1 = y1;
 return this;

};

var tree_data = function() {

 var data = [];
 this.visit(function(node) {
   if (!node.length) do data.push(node.data); while (node = node.next)
 });
 return data;

};

var tree_extent = function(_) {

 return arguments.length
     ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1])
     : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]];

};

var Quad = function(node, x0, y0, x1, y1) {

 this.node = node;
 this.x0 = x0;
 this.y0 = y0;
 this.x1 = x1;
 this.y1 = y1;

};

var tree_find = function(x, y, radius) {

 var data,
     x0 = this._x0,
     y0 = this._y0,
     x1,
     y1,
     x2,
     y2,
     x3 = this._x1,
     y3 = this._y1,
     quads = [],
     node = this._root,
     q,
     i;

 if (node) quads.push(new Quad(node, x0, y0, x3, y3));
 if (radius == null) radius = Infinity;
 else {
   x0 = x - radius, y0 = y - radius;
   x3 = x + radius, y3 = y + radius;
   radius *= radius;
 }

 while (q = quads.pop()) {

   // Stop searching if this quadrant can’t contain a closer node.
   if (!(node = q.node)
       || (x1 = q.x0) > x3
       || (y1 = q.y0) > y3
       || (x2 = q.x1) < x0
       || (y2 = q.y1) < y0) continue;

   // Bisect the current quadrant.
   if (node.length) {
     var xm = (x1 + x2) / 2,
         ym = (y1 + y2) / 2;

     quads.push(
       new Quad(node[3], xm, ym, x2, y2),
       new Quad(node[2], x1, ym, xm, y2),
       new Quad(node[1], xm, y1, x2, ym),
       new Quad(node[0], x1, y1, xm, ym)
     );

     // Visit the closest quadrant first.
     if (i = (y >= ym) << 1 | (x >= xm)) {
       q = quads[quads.length - 1];
       quads[quads.length - 1] = quads[quads.length - 1 - i];
       quads[quads.length - 1 - i] = q;
     }
   }

   // Visit this point. (Visiting coincident points isn’t necessary!)
   else {
     var dx = x - +this._x.call(null, node.data),
         dy = y - +this._y.call(null, node.data),
         d2 = dx * dx + dy * dy;
     if (d2 < radius) {
       var d = Math.sqrt(radius = d2);
       x0 = x - d, y0 = y - d;
       x3 = x + d, y3 = y + d;
       data = node.data;
     }
   }
 }

 return data;

};

var tree_remove = function(d) {

 if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points

 var parent,
     node = this._root,
     retainer,
     previous,
     next,
     x0 = this._x0,
     y0 = this._y0,
     x1 = this._x1,
     y1 = this._y1,
     x,
     y,
     xm,
     ym,
     right,
     bottom,
     i,
     j;

 // If the tree is empty, initialize the root as a leaf.
 if (!node) return this;

 // Find the leaf node for the point.
 // While descending, also retain the deepest parent with a non-removed sibling.
 if (node.length) while (true) {
   if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
   if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
   if (!(parent = node, node = node[i = bottom << 1 | right])) return this;
   if (!node.length) break;
   if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i;
 }

 // Find the point to remove.
 while (node.data !== d) if (!(previous = node, node = node.next)) return this;
 if (next = node.next) delete node.next;

 // If there are multiple coincident points, remove just the point.
 if (previous) return (next ? previous.next = next : delete previous.next), this;

 // If this is the root point, remove it.
 if (!parent) return this._root = next, this;

 // Remove this leaf.
 next ? parent[i] = next : delete parent[i];

 // If the parent now contains exactly one leaf, collapse superfluous parents.
 if ((node = parent[0] || parent[1] || parent[2] || parent[3])
     && node === (parent[3] || parent[2] || parent[1] || parent[0])
     && !node.length) {
   if (retainer) retainer[j] = node;
   else this._root = node;
 }

 return this;

};

function removeAll(data) {

 for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);
 return this;

}

var tree_root = function() {

 return this._root;

};

var tree_size = function() {

 var size = 0;
 this.visit(function(node) {
   if (!node.length) do ++size; while (node = node.next)
 });
 return size;

};

var tree_visit = function(callback) {

 var quads = [], q, node = this._root, child, x0, y0, x1, y1;
 if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1));
 while (q = quads.pop()) {
   if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) {
     var xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
     if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
     if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
     if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
     if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
   }
 }
 return this;

};

var tree_visitAfter = function(callback) {

 var quads = [], next = [], q;
 if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));
 while (q = quads.pop()) {
   var node = q.node;
   if (node.length) {
     var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
     if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
     if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
     if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
     if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
   }
   next.push(q);
 }
 while (q = next.pop()) {
   callback(q.node, q.x0, q.y0, q.x1, q.y1);
 }
 return this;

};

function defaultX(d) {

 return d[0];

}

var tree_x = function(_) {

 return arguments.length ? (this._x = _, this) : this._x;

};

function defaultY(d) {

 return d[1];

}

var tree_y = function(_) {

 return arguments.length ? (this._y = _, this) : this._y;

};

function quadtree(nodes, x, y) {

 var tree = new Quadtree(x == null ? defaultX : x, y == null ? defaultY : y, NaN, NaN, NaN, NaN);
 return nodes == null ? tree : tree.addAll(nodes);

}

function Quadtree(x, y, x0, y0, x1, y1) {

 this._x = x;
 this._y = y;
 this._x0 = x0;
 this._y0 = y0;
 this._x1 = x1;
 this._y1 = y1;
 this._root = undefined;

}

function leaf_copy(leaf) {

 var copy = {data: leaf.data}, next = copy;
 while (leaf = leaf.next) next = next.next = {data: leaf.data};
 return copy;

}

var treeProto = quadtree.prototype = Quadtree.prototype;

treeProto.copy = function() {

 var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1),
     node = this._root,
     nodes,
     child;

 if (!node) return copy;

 if (!node.length) return copy._root = leaf_copy(node), copy;

 nodes = [{source: node, target: copy._root = new Array(4)}];
 while (node = nodes.pop()) {
   for (var i = 0; i < 4; ++i) {
     if (child = node.source[i]) {
       if (child.length) nodes.push({source: child, target: node.target[i] = new Array(4)});
       else node.target[i] = leaf_copy(child);
     }
   }
 }

 return copy;

};

treeProto.add = tree_add; treeProto.addAll = addAll; treeProto.cover = tree_cover; treeProto.data = tree_data; treeProto.extent = tree_extent; treeProto.find = tree_find; treeProto.remove = tree_remove; treeProto.removeAll = removeAll; treeProto.root = tree_root; treeProto.size = tree_size; treeProto.visit = tree_visit; treeProto.visitAfter = tree_visitAfter; treeProto.x = tree_x; treeProto.y = tree_y;

function x(d) {

 return d.x + d.vx;

}

function y(d) {

 return d.y + d.vy;

}

var collide = function(radius) {

 var nodes,
     radii,
     strength = 1,
     iterations = 1;

 if (typeof radius !== "function") radius = constant$6(radius == null ? 1 : +radius);

 function force() {
   var i, n = nodes.length,
       tree,
       node,
       xi,
       yi,
       ri,
       ri2;

   for (var k = 0; k < iterations; ++k) {
     tree = quadtree(nodes, x, y).visitAfter(prepare);
     for (i = 0; i < n; ++i) {
       node = nodes[i];
       ri = radii[node.index], ri2 = ri * ri;
       xi = node.x + node.vx;
       yi = node.y + node.vy;
       tree.visit(apply);
     }
   }

   function apply(quad, x0, y0, x1, y1) {
     var data = quad.data, rj = quad.r, r = ri + rj;
     if (data) {
       if (data.index > node.index) {
         var x = xi - data.x - data.vx,
             y = yi - data.y - data.vy,
             l = x * x + y * y;
         if (l < r * r) {
           if (x === 0) x = jiggle(), l += x * x;
           if (y === 0) y = jiggle(), l += y * y;
           l = (r - (l = Math.sqrt(l))) / l * strength;
           node.vx += (x *= l) * (r = (rj *= rj) / (ri2 + rj));
           node.vy += (y *= l) * r;
           data.vx -= x * (r = 1 - r);
           data.vy -= y * r;
         }
       }
       return;
     }
     return x0 > xi + r || x1 < xi - r || y0 > yi + r || y1 < yi - r;
   }
 }

 function prepare(quad) {
   if (quad.data) return quad.r = radii[quad.data.index];
   for (var i = quad.r = 0; i < 4; ++i) {
     if (quad[i] && quad[i].r > quad.r) {
       quad.r = quad[i].r;
     }
   }
 }

 function initialize() {
   if (!nodes) return;
   var i, n = nodes.length, node;
   radii = new Array(n);
   for (i = 0; i < n; ++i) node = nodes[i], radii[node.index] = +radius(node, i, nodes);
 }

 force.initialize = function(_) {
   nodes = _;
   initialize();
 };

 force.iterations = function(_) {
   return arguments.length ? (iterations = +_, force) : iterations;
 };

 force.strength = function(_) {
   return arguments.length ? (strength = +_, force) : strength;
 };

 force.radius = function(_) {
   return arguments.length ? (radius = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : radius;
 };

 return force;

};

function index(d) {

 return d.index;

}

function find(nodeById, nodeId) {

 var node = nodeById.get(nodeId);
 if (!node) throw new Error("missing: " + nodeId);
 return node;

}

var link = function(links) {

 var id = index,
     strength = defaultStrength,
     strengths,
     distance = constant$6(30),
     distances,
     nodes,
     count,
     bias,
     iterations = 1;

 if (links == null) links = [];

 function defaultStrength(link) {
   return 1 / Math.min(count[link.source.index], count[link.target.index]);
 }

 function force(alpha) {
   for (var k = 0, n = links.length; k < iterations; ++k) {
     for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) {
       link = links[i], source = link.source, target = link.target;
       x = target.x + target.vx - source.x - source.vx || jiggle();
       y = target.y + target.vy - source.y - source.vy || jiggle();
       l = Math.sqrt(x * x + y * y);
       l = (l - distances[i]) / l * alpha * strengths[i];
       x *= l, y *= l;
       target.vx -= x * (b = bias[i]);
       target.vy -= y * b;
       source.vx += x * (b = 1 - b);
       source.vy += y * b;
     }
   }
 }

 function initialize() {
   if (!nodes) return;

   var i,
       n = nodes.length,
       m = links.length,
       nodeById = map$1(nodes, id),
       link;

   for (i = 0, count = new Array(n); i < m; ++i) {
     link = links[i], link.index = i;
     if (typeof link.source !== "object") link.source = find(nodeById, link.source);
     if (typeof link.target !== "object") link.target = find(nodeById, link.target);
     count[link.source.index] = (count[link.source.index] || 0) + 1;
     count[link.target.index] = (count[link.target.index] || 0) + 1;
   }

   for (i = 0, bias = new Array(m); i < m; ++i) {
     link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]);
   }

   strengths = new Array(m), initializeStrength();
   distances = new Array(m), initializeDistance();
 }

 function initializeStrength() {
   if (!nodes) return;

   for (var i = 0, n = links.length; i < n; ++i) {
     strengths[i] = +strength(links[i], i, links);
   }
 }

 function initializeDistance() {
   if (!nodes) return;

   for (var i = 0, n = links.length; i < n; ++i) {
     distances[i] = +distance(links[i], i, links);
   }
 }

 force.initialize = function(_) {
   nodes = _;
   initialize();
 };

 force.links = function(_) {
   return arguments.length ? (links = _, initialize(), force) : links;
 };

 force.id = function(_) {
   return arguments.length ? (id = _, force) : id;
 };

 force.iterations = function(_) {
   return arguments.length ? (iterations = +_, force) : iterations;
 };

 force.strength = function(_) {
   return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initializeStrength(), force) : strength;
 };

 force.distance = function(_) {
   return arguments.length ? (distance = typeof _ === "function" ? _ : constant$6(+_), initializeDistance(), force) : distance;
 };

 return force;

};

function x$1(d) {

 return d.x;

}

function y$1(d) {

 return d.y;

}

var initialRadius = 10; var initialAngle = Math.PI * (3 - Math.sqrt(5));

var simulation = function(nodes) {

 var simulation,
     alpha = 1,
     alphaMin = 0.001,
     alphaDecay = 1 - Math.pow(alphaMin, 1 / 300),
     alphaTarget = 0,
     velocityDecay = 0.6,
     forces = map$1(),
     stepper = timer(step),
     event = dispatch("tick", "end");

 if (nodes == null) nodes = [];

 function step() {
   tick();
   event.call("tick", simulation);
   if (alpha < alphaMin) {
     stepper.stop();
     event.call("end", simulation);
   }
 }

 function tick() {
   var i, n = nodes.length, node;

   alpha += (alphaTarget - alpha) * alphaDecay;

   forces.each(function(force) {
     force(alpha);
   });

   for (i = 0; i < n; ++i) {
     node = nodes[i];
     if (node.fx == null) node.x += node.vx *= velocityDecay;
     else node.x = node.fx, node.vx = 0;
     if (node.fy == null) node.y += node.vy *= velocityDecay;
     else node.y = node.fy, node.vy = 0;
   }
 }

 function initializeNodes() {
   for (var i = 0, n = nodes.length, node; i < n; ++i) {
     node = nodes[i], node.index = i;
     if (isNaN(node.x) || isNaN(node.y)) {
       var radius = initialRadius * Math.sqrt(i), angle = i * initialAngle;
       node.x = radius * Math.cos(angle);
       node.y = radius * Math.sin(angle);
     }
     if (isNaN(node.vx) || isNaN(node.vy)) {
       node.vx = node.vy = 0;
     }
   }
 }

 function initializeForce(force) {
   if (force.initialize) force.initialize(nodes);
   return force;
 }

 initializeNodes();

 return simulation = {
   tick: tick,

   restart: function() {
     return stepper.restart(step), simulation;
   },

   stop: function() {
     return stepper.stop(), simulation;
   },

   nodes: function(_) {
     return arguments.length ? (nodes = _, initializeNodes(), forces.each(initializeForce), simulation) : nodes;
   },

   alpha: function(_) {
     return arguments.length ? (alpha = +_, simulation) : alpha;
   },

   alphaMin: function(_) {
     return arguments.length ? (alphaMin = +_, simulation) : alphaMin;
   },

   alphaDecay: function(_) {
     return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay;
   },

   alphaTarget: function(_) {
     return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget;
   },

   velocityDecay: function(_) {
     return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay;
   },

   force: function(name, _) {
     return arguments.length > 1 ? ((_ == null ? forces.remove(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name);
   },

   find: function(x, y, radius) {
     var i = 0,
         n = nodes.length,
         dx,
         dy,
         d2,
         node,
         closest;

     if (radius == null) radius = Infinity;
     else radius *= radius;

     for (i = 0; i < n; ++i) {
       node = nodes[i];
       dx = x - node.x;
       dy = y - node.y;
       d2 = dx * dx + dy * dy;
       if (d2 < radius) closest = node, radius = d2;
     }

     return closest;
   },

   on: function(name, _) {
     return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);
   }
 };

};

var manyBody = function() {

 var nodes,
     node,
     alpha,
     strength = constant$6(-30),
     strengths,
     distanceMin2 = 1,
     distanceMax2 = Infinity,
     theta2 = 0.81;

 function force(_) {
   var i, n = nodes.length, tree = quadtree(nodes, x$1, y$1).visitAfter(accumulate);
   for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply);
 }

 function initialize() {
   if (!nodes) return;
   var i, n = nodes.length, node;
   strengths = new Array(n);
   for (i = 0; i < n; ++i) node = nodes[i], strengths[node.index] = +strength(node, i, nodes);
 }

 function accumulate(quad) {
   var strength = 0, q, c, weight = 0, x, y, i;

   // For internal nodes, accumulate forces from child quadrants.
   if (quad.length) {
     for (x = y = i = 0; i < 4; ++i) {
       if ((q = quad[i]) && (c = Math.abs(q.value))) {
         strength += q.value, weight += c, x += c * q.x, y += c * q.y;
       }
     }
     quad.x = x / weight;
     quad.y = y / weight;
   }

   // For leaf nodes, accumulate forces from coincident quadrants.
   else {
     q = quad;
     q.x = q.data.x;
     q.y = q.data.y;
     do strength += strengths[q.data.index];
     while (q = q.next);
   }

   quad.value = strength;
 }

 function apply(quad, x1, _, x2) {
   if (!quad.value) return true;

   var x = quad.x - node.x,
       y = quad.y - node.y,
       w = x2 - x1,
       l = x * x + y * y;

   // Apply the Barnes-Hut approximation if possible.
   // Limit forces for very close nodes; randomize direction if coincident.
   if (w * w / theta2 < l) {
     if (l < distanceMax2) {
       if (x === 0) x = jiggle(), l += x * x;
       if (y === 0) y = jiggle(), l += y * y;
       if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
       node.vx += x * quad.value * alpha / l;
       node.vy += y * quad.value * alpha / l;
     }
     return true;
   }

   // Otherwise, process points directly.
   else if (quad.length || l >= distanceMax2) return;

   // Limit forces for very close nodes; randomize direction if coincident.
   if (quad.data !== node || quad.next) {
     if (x === 0) x = jiggle(), l += x * x;
     if (y === 0) y = jiggle(), l += y * y;
     if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
   }

   do if (quad.data !== node) {
     w = strengths[quad.data.index] * alpha / l;
     node.vx += x * w;
     node.vy += y * w;
   } while (quad = quad.next);
 }

 force.initialize = function(_) {
   nodes = _;
   initialize();
 };

 force.strength = function(_) {
   return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
 };

 force.distanceMin = function(_) {
   return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2);
 };

 force.distanceMax = function(_) {
   return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2);
 };

 force.theta = function(_) {
   return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2);
 };

 return force;

};

var radial = function(radius, x, y) {

 var nodes,
     strength = constant$6(0.1),
     strengths,
     radiuses;

 if (typeof radius !== "function") radius = constant$6(+radius);
 if (x == null) x = 0;
 if (y == null) y = 0;

 function force(alpha) {
   for (var i = 0, n = nodes.length; i < n; ++i) {
     var node = nodes[i],
         dx = node.x - x || 1e-6,
         dy = node.y - y || 1e-6,
         r = Math.sqrt(dx * dx + dy * dy),
         k = (radiuses[i] - r) * strengths[i] * alpha / r;
     node.vx += dx * k;
     node.vy += dy * k;
   }
 }

 function initialize() {
   if (!nodes) return;
   var i, n = nodes.length;
   strengths = new Array(n);
   radiuses = new Array(n);
   for (i = 0; i < n; ++i) {
     radiuses[i] = +radius(nodes[i], i, nodes);
     strengths[i] = isNaN(radiuses[i]) ? 0 : +strength(nodes[i], i, nodes);
   }
 }

 force.initialize = function(_) {
   nodes = _, initialize();
 };

 force.strength = function(_) {
   return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
 };

 force.radius = function(_) {
   return arguments.length ? (radius = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : radius;
 };

 force.x = function(_) {
   return arguments.length ? (x = +_, force) : x;
 };

 force.y = function(_) {
   return arguments.length ? (y = +_, force) : y;
 };

 return force;

};

var x$2 = function(x) {

 var strength = constant$6(0.1),
     nodes,
     strengths,
     xz;

 if (typeof x !== "function") x = constant$6(x == null ? 0 : +x);

 function force(alpha) {
   for (var i = 0, n = nodes.length, node; i < n; ++i) {
     node = nodes[i], node.vx += (xz[i] - node.x) * strengths[i] * alpha;
   }
 }

 function initialize() {
   if (!nodes) return;
   var i, n = nodes.length;
   strengths = new Array(n);
   xz = new Array(n);
   for (i = 0; i < n; ++i) {
     strengths[i] = isNaN(xz[i] = +x(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
   }
 }

 force.initialize = function(_) {
   nodes = _;
   initialize();
 };

 force.strength = function(_) {
   return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
 };

 force.x = function(_) {
   return arguments.length ? (x = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : x;
 };

 return force;

};

var y$2 = function(y) {

 var strength = constant$6(0.1),
     nodes,
     strengths,
     yz;

 if (typeof y !== "function") y = constant$6(y == null ? 0 : +y);

 function force(alpha) {
   for (var i = 0, n = nodes.length, node; i < n; ++i) {
     node = nodes[i], node.vy += (yz[i] - node.y) * strengths[i] * alpha;
   }
 }

 function initialize() {
   if (!nodes) return;
   var i, n = nodes.length;
   strengths = new Array(n);
   yz = new Array(n);
   for (i = 0; i < n; ++i) {
     strengths[i] = isNaN(yz[i] = +y(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
   }
 }

 force.initialize = function(_) {
   nodes = _;
   initialize();
 };

 force.strength = function(_) {
   return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
 };

 force.y = function(_) {
   return arguments.length ? (y = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : y;
 };

 return force;

};

// Computes the decimal coefficient and exponent of the specified number x with // significant digits p, where x is positive and p is in [1, 21] or undefined. // For example, formatDecimal(1.23) returns ["123", 0]. var formatDecimal = function(x, p) {

 if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
 var i, coefficient = x.slice(0, i);

 // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
 // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
 return [
   coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,
   +x.slice(i + 1)
 ];

};

var exponent$1 = function(x) {

 return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;

};

var formatGroup = function(grouping, thousands) {

 return function(value, width) {
   var i = value.length,
       t = [],
       j = 0,
       g = grouping[0],
       length = 0;

   while (i > 0 && g > 0) {
     if (length + g + 1 > width) g = Math.max(1, width - length);
     t.push(value.substring(i -= g, i + g));
     if ((length += g + 1) > width) break;
     g = grouping[j = (j + 1) % grouping.length];
   }

   return t.reverse().join(thousands);
 };

};

var formatNumerals = function(numerals) {

 return function(value) {
   return value.replace(/[0-9]/g, function(i) {
     return numerals[+i];
   });
 };

};

var formatDefault = function(x, p) {

 x = x.toPrecision(p);

 out: for (var n = x.length, i = 1, i0 = -1, i1; i < n; ++i) {
   switch (x[i]) {
     case ".": i0 = i1 = i; break;
     case "0": if (i0 === 0) i0 = i; i1 = i; break;
     case "e": break out;
     default: if (i0 > 0) i0 = 0; break;
   }
 }

 return i0 > 0 ? x.slice(0, i0) + x.slice(i1 + 1) : x;

};

var prefixExponent;

var formatPrefixAuto = function(x, p) {

 var d = formatDecimal(x, p);
 if (!d) return x + "";
 var coefficient = d[0],
     exponent = d[1],
     i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
     n = coefficient.length;
 return i === n ? coefficient
     : i > n ? coefficient + new Array(i - n + 1).join("0")
     : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i)
     : "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!

};

var formatRounded = function(x, p) {

 var d = formatDecimal(x, p);
 if (!d) return x + "";
 var coefficient = d[0],
     exponent = d[1];
 return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient
     : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1)
     : coefficient + new Array(exponent - coefficient.length + 2).join("0");

};

var formatTypes = {

 "": formatDefault,
 "%": function(x, p) { return (x * 100).toFixed(p); },
 "b": function(x) { return Math.round(x).toString(2); },
 "c": function(x) { return x + ""; },
 "d": function(x) { return Math.round(x).toString(10); },
 "e": function(x, p) { return x.toExponential(p); },
 "f": function(x, p) { return x.toFixed(p); },
 "g": function(x, p) { return x.toPrecision(p); },
 "o": function(x) { return Math.round(x).toString(8); },
 "p": function(x, p) { return formatRounded(x * 100, p); },
 "r": formatRounded,
 "s": formatPrefixAuto,
 "X": function(x) { return Math.round(x).toString(16).toUpperCase(); },
 "x": function(x) { return Math.round(x).toString(16); }

};

// [[fill]align][sign][symbol][0][width][,][.precision][type] var re = /^(?:(.)?([<>=^]))?([+\-\( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?([a-z%])?$/i;

function formatSpecifier(specifier) {

 return new FormatSpecifier(specifier);

}

formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof

function FormatSpecifier(specifier) {

 if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);

 var match,
     fill = match[1] || " ",
     align = match[2] || ">",
     sign = match[3] || "-",
     symbol = match[4] || "",
     zero = !!match[5],
     width = match[6] && +match[6],
     comma = !!match[7],
     precision = match[8] && +match[8].slice(1),
     type = match[9] || "";

 // The "n" type is an alias for ",g".
 if (type === "n") comma = true, type = "g";

 // Map invalid types to the default format.
 else if (!formatTypes[type]) type = "";

 // If zero fill is specified, padding goes after sign and before digits.
 if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "=";

 this.fill = fill;
 this.align = align;
 this.sign = sign;
 this.symbol = symbol;
 this.zero = zero;
 this.width = width;
 this.comma = comma;
 this.precision = precision;
 this.type = type;

}

FormatSpecifier.prototype.toString = function() {

 return this.fill
     + this.align
     + this.sign
     + this.symbol
     + (this.zero ? "0" : "")
     + (this.width == null ? "" : Math.max(1, this.width | 0))
     + (this.comma ? "," : "")
     + (this.precision == null ? "" : "." + Math.max(0, this.precision | 0))
     + this.type;

};

var identity$3 = function(x) {

 return x;

};

var prefixes = ["y","z","a","f","p","n","\xB5","m","","k","M","G","T","P","E","Z","Y"];

var formatLocale = function(locale) {

 var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity$3,
     currency = locale.currency,
     decimal = locale.decimal,
     numerals = locale.numerals ? formatNumerals(locale.numerals) : identity$3,
     percent = locale.percent || "%";

 function newFormat(specifier) {
   specifier = formatSpecifier(specifier);

   var fill = specifier.fill,
       align = specifier.align,
       sign = specifier.sign,
       symbol = specifier.symbol,
       zero = specifier.zero,
       width = specifier.width,
       comma = specifier.comma,
       precision = specifier.precision,
       type = specifier.type;

   // Compute the prefix and suffix.
   // For SI-prefix, the suffix is lazily computed.
   var prefix = symbol === "$" ? currency[0] : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
       suffix = symbol === "$" ? currency[1] : /[%p]/.test(type) ? percent : "";

   // What format function should we use?
   // Is this an integer type?
   // Can this type generate exponential notation?
   var formatType = formatTypes[type],
       maybeSuffix = !type || /[defgprs%]/.test(type);

   // Set the default precision if not specified,
   // or clamp the specified precision to the supported range.
   // For significant precision, it must be in [1, 21].
   // For fixed precision, it must be in [0, 20].
   precision = precision == null ? (type ? 6 : 12)
       : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
       : Math.max(0, Math.min(20, precision));

   function format(value) {
     var valuePrefix = prefix,
         valueSuffix = suffix,
         i, n, c;

     if (type === "c") {
       valueSuffix = formatType(value) + valueSuffix;
       value = "";
     } else {
       value = +value;

       // Perform the initial formatting.
       var valueNegative = value < 0;
       value = formatType(Math.abs(value), precision);

       // If a negative value rounds to zero during formatting, treat as positive.
       if (valueNegative && +value === 0) valueNegative = false;

       // Compute the prefix and suffix.
       valuePrefix = (valueNegative ? (sign === "(" ? sign : "-") : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
       valueSuffix = valueSuffix + (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + (valueNegative && sign === "(" ? ")" : "");

       // Break the formatted value into the integer “value” part that can be
       // grouped, and fractional or exponential “suffix” part that is not.
       if (maybeSuffix) {
         i = -1, n = value.length;
         while (++i < n) {
           if (c = value.charCodeAt(i), 48 > c || c > 57) {
             valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
             value = value.slice(0, i);
             break;
           }
         }
       }
     }

     // If the fill character is not "0", grouping is applied before padding.
     if (comma && !zero) value = group(value, Infinity);

     // Compute the padding.
     var length = valuePrefix.length + value.length + valueSuffix.length,
         padding = length < width ? new Array(width - length + 1).join(fill) : "";

     // If the fill character is "0", grouping is applied after padding.
     if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = "";

     // Reconstruct the final output based on the desired alignment.
     switch (align) {
       case "<": value = valuePrefix + value + valueSuffix + padding; break;
       case "=": value = valuePrefix + padding + value + valueSuffix; break;
       case "^": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;
       default: value = padding + valuePrefix + value + valueSuffix; break;
     }

     return numerals(value);
   }

   format.toString = function() {
     return specifier + "";
   };

   return format;
 }

 function formatPrefix(specifier, value) {
   var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
       e = Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3,
       k = Math.pow(10, -e),
       prefix = prefixes[8 + e / 3];
   return function(value) {
     return f(k * value) + prefix;
   };
 }

 return {
   format: newFormat,
   formatPrefix: formatPrefix
 };

};

var locale;

defaultLocale({

 decimal: ".",
 thousands: ",",
 grouping: [3],
 currency: ["$", ""]

});

function defaultLocale(definition) {

 locale = formatLocale(definition);
 exports.format = locale.format;
 exports.formatPrefix = locale.formatPrefix;
 return locale;

}

var precisionFixed = function(step) {

 return Math.max(0, -exponent$1(Math.abs(step)));

};

var precisionPrefix = function(step, value) {

 return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3 - exponent$1(Math.abs(step)));

};

var precisionRound = function(step, max) {

 step = Math.abs(step), max = Math.abs(max) - step;
 return Math.max(0, exponent$1(max) - exponent$1(step)) + 1;

};

// Adds floating point numbers with twice the normal precision. // Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and // Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3) // 305–363 (1997). // Code adapted from GeographicLib by Charles F. F. Karney, // http://geographiclib.sourceforge.net/

var adder = function() {

 return new Adder;

};

function Adder() {

 this.reset();

}

Adder.prototype = {

 constructor: Adder,
 reset: function() {
   this.s = // rounded value
   this.t = 0; // exact error
 },
 add: function(y) {
   add$1(temp, y, this.t);
   add$1(this, temp.s, this.s);
   if (this.s) this.t += temp.t;
   else this.s = temp.t;
 },
 valueOf: function() {
   return this.s;
 }

};

var temp = new Adder;

function add$1(adder, a, b) {

 var x = adder.s = a + b,
     bv = x - a,
     av = x - bv;
 adder.t = (a - av) + (b - bv);

}

var epsilon$2 = 1e-6; var epsilon2$1 = 1e-12; var pi$3 = Math.PI; var halfPi$2 = pi$3 / 2; var quarterPi = pi$3 / 4; var tau$3 = pi$3 * 2;

var degrees$1 = 180 / pi$3; var radians = pi$3 / 180;

var abs = Math.abs; var atan = Math.atan; var atan2 = Math.atan2; var cos$1 = Math.cos; var ceil = Math.ceil; var exp = Math.exp;

var log = Math.log; var pow = Math.pow; var sin$1 = Math.sin; var sign = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; }; var sqrt = Math.sqrt; var tan = Math.tan;

function acos(x) {

 return x > 1 ? 0 : x < -1 ? pi$3 : Math.acos(x);

}

function asin(x) {

 return x > 1 ? halfPi$2 : x < -1 ? -halfPi$2 : Math.asin(x);

}

function haversin(x) {

 return (x = sin$1(x / 2)) * x;

}

function noop$1() {}

function streamGeometry(geometry, stream) {

 if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
   streamGeometryType[geometry.type](geometry, stream);
 }

}

var streamObjectType = {

 Feature: function(object, stream) {
   streamGeometry(object.geometry, stream);
 },
 FeatureCollection: function(object, stream) {
   var features = object.features, i = -1, n = features.length;
   while (++i < n) streamGeometry(features[i].geometry, stream);
 }

};

var streamGeometryType = {

 Sphere: function(object, stream) {
   stream.sphere();
 },
 Point: function(object, stream) {
   object = object.coordinates;
   stream.point(object[0], object[1], object[2]);
 },
 MultiPoint: function(object, stream) {
   var coordinates = object.coordinates, i = -1, n = coordinates.length;
   while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]);
 },
 LineString: function(object, stream) {
   streamLine(object.coordinates, stream, 0);
 },
 MultiLineString: function(object, stream) {
   var coordinates = object.coordinates, i = -1, n = coordinates.length;
   while (++i < n) streamLine(coordinates[i], stream, 0);
 },
 Polygon: function(object, stream) {
   streamPolygon(object.coordinates, stream);
 },
 MultiPolygon: function(object, stream) {
   var coordinates = object.coordinates, i = -1, n = coordinates.length;
   while (++i < n) streamPolygon(coordinates[i], stream);
 },
 GeometryCollection: function(object, stream) {
   var geometries = object.geometries, i = -1, n = geometries.length;
   while (++i < n) streamGeometry(geometries[i], stream);
 }

};

function streamLine(coordinates, stream, closed) {

 var i = -1, n = coordinates.length - closed, coordinate;
 stream.lineStart();
 while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
 stream.lineEnd();

}

function streamPolygon(coordinates, stream) {

 var i = -1, n = coordinates.length;
 stream.polygonStart();
 while (++i < n) streamLine(coordinates[i], stream, 1);
 stream.polygonEnd();

}

var geoStream = function(object, stream) {

 if (object && streamObjectType.hasOwnProperty(object.type)) {
   streamObjectType[object.type](object, stream);
 } else {
   streamGeometry(object, stream);
 }

};

var areaRingSum = adder();

var areaSum = adder(); var lambda00; var phi00; var lambda0; var cosPhi0; var sinPhi0;

var areaStream = {

 point: noop$1,
 lineStart: noop$1,
 lineEnd: noop$1,
 polygonStart: function() {
   areaRingSum.reset();
   areaStream.lineStart = areaRingStart;
   areaStream.lineEnd = areaRingEnd;
 },
 polygonEnd: function() {
   var areaRing = +areaRingSum;
   areaSum.add(areaRing < 0 ? tau$3 + areaRing : areaRing);
   this.lineStart = this.lineEnd = this.point = noop$1;
 },
 sphere: function() {
   areaSum.add(tau$3);
 }

};

function areaRingStart() {

 areaStream.point = areaPointFirst;

}

function areaRingEnd() {

 areaPoint(lambda00, phi00);

}

function areaPointFirst(lambda, phi) {

 areaStream.point = areaPoint;
 lambda00 = lambda, phi00 = phi;
 lambda *= radians, phi *= radians;
 lambda0 = lambda, cosPhi0 = cos$1(phi = phi / 2 + quarterPi), sinPhi0 = sin$1(phi);

}

function areaPoint(lambda, phi) {

 lambda *= radians, phi *= radians;
 phi = phi / 2 + quarterPi; // half the angular distance from south pole

 // Spherical excess E for a spherical triangle with vertices: south pole,
 // previous point, current point.  Uses a formula derived from Cagnoli’s
 // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
 var dLambda = lambda - lambda0,
     sdLambda = dLambda >= 0 ? 1 : -1,
     adLambda = sdLambda * dLambda,
     cosPhi = cos$1(phi),
     sinPhi = sin$1(phi),
     k = sinPhi0 * sinPhi,
     u = cosPhi0 * cosPhi + k * cos$1(adLambda),
     v = k * sdLambda * sin$1(adLambda);
 areaRingSum.add(atan2(v, u));

 // Advance the previous points.
 lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;

}

var area = function(object) {

 areaSum.reset();
 geoStream(object, areaStream);
 return areaSum * 2;

};

function spherical(cartesian) {

 return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];

}

function cartesian(spherical) {

 var lambda = spherical[0], phi = spherical[1], cosPhi = cos$1(phi);
 return [cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi)];

}

function cartesianDot(a, b) {

 return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];

}

function cartesianCross(a, b) {

 return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];

}

// TODO return a function cartesianAddInPlace(a, b) {

 a[0] += b[0], a[1] += b[1], a[2] += b[2];

}

function cartesianScale(vector, k) {

 return [vector[0] * k, vector[1] * k, vector[2] * k];

}

// TODO return d function cartesianNormalizeInPlace(d) {

 var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
 d[0] /= l, d[1] /= l, d[2] /= l;

}

var lambda0$1; var phi0; var lambda1; var phi1; var lambda2; var lambda00$1; var phi00$1; var p0; var deltaSum = adder(); var ranges; var range;

var boundsStream = {

 point: boundsPoint,
 lineStart: boundsLineStart,
 lineEnd: boundsLineEnd,
 polygonStart: function() {
   boundsStream.point = boundsRingPoint;
   boundsStream.lineStart = boundsRingStart;
   boundsStream.lineEnd = boundsRingEnd;
   deltaSum.reset();
   areaStream.polygonStart();
 },
 polygonEnd: function() {
   areaStream.polygonEnd();
   boundsStream.point = boundsPoint;
   boundsStream.lineStart = boundsLineStart;
   boundsStream.lineEnd = boundsLineEnd;
   if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
   else if (deltaSum > epsilon$2) phi1 = 90;
   else if (deltaSum < -epsilon$2) phi0 = -90;
   range[0] = lambda0$1, range[1] = lambda1;
 }

};

function boundsPoint(lambda, phi) {

 ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
 if (phi < phi0) phi0 = phi;
 if (phi > phi1) phi1 = phi;

}

function linePoint(lambda, phi) {

 var p = cartesian([lambda * radians, phi * radians]);
 if (p0) {
   var normal = cartesianCross(p0, p),
       equatorial = [normal[1], -normal[0], 0],
       inflection = cartesianCross(equatorial, normal);
   cartesianNormalizeInPlace(inflection);
   inflection = spherical(inflection);
   var delta = lambda - lambda2,
       sign$$1 = delta > 0 ? 1 : -1,
       lambdai = inflection[0] * degrees$1 * sign$$1,
       phii,
       antimeridian = abs(delta) > 180;
   if (antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
     phii = inflection[1] * degrees$1;
     if (phii > phi1) phi1 = phii;
   } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
     phii = -inflection[1] * degrees$1;
     if (phii < phi0) phi0 = phii;
   } else {
     if (phi < phi0) phi0 = phi;
     if (phi > phi1) phi1 = phi;
   }
   if (antimeridian) {
     if (lambda < lambda2) {
       if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
     } else {
       if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
     }
   } else {
     if (lambda1 >= lambda0$1) {
       if (lambda < lambda0$1) lambda0$1 = lambda;
       if (lambda > lambda1) lambda1 = lambda;
     } else {
       if (lambda > lambda2) {
         if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
       } else {
         if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
       }
     }
   }
 } else {
   ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
 }
 if (phi < phi0) phi0 = phi;
 if (phi > phi1) phi1 = phi;
 p0 = p, lambda2 = lambda;

}

function boundsLineStart() {

 boundsStream.point = linePoint;

}

function boundsLineEnd() {

 range[0] = lambda0$1, range[1] = lambda1;
 boundsStream.point = boundsPoint;
 p0 = null;

}

function boundsRingPoint(lambda, phi) {

 if (p0) {
   var delta = lambda - lambda2;
   deltaSum.add(abs(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
 } else {
   lambda00$1 = lambda, phi00$1 = phi;
 }
 areaStream.point(lambda, phi);
 linePoint(lambda, phi);

}

function boundsRingStart() {

 areaStream.lineStart();

}

function boundsRingEnd() {

 boundsRingPoint(lambda00$1, phi00$1);
 areaStream.lineEnd();
 if (abs(deltaSum) > epsilon$2) lambda0$1 = -(lambda1 = 180);
 range[0] = lambda0$1, range[1] = lambda1;
 p0 = null;

}

// Finds the left-right distance between two longitudes. // This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want // the distance between ±180° to be 360°. function angle(lambda0, lambda1) {

 return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;

}

function rangeCompare(a, b) {

 return a[0] - b[0];

}

function rangeContains(range, x) {

 return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;

}

var bounds = function(feature) {

 var i, n, a, b, merged, deltaMax, delta;

 phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
 ranges = [];
 geoStream(feature, boundsStream);

 // First, sort ranges by their minimum longitudes.
 if (n = ranges.length) {
   ranges.sort(rangeCompare);

   // Then, merge any ranges that overlap.
   for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
     b = ranges[i];
     if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
       if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
       if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
     } else {
       merged.push(a = b);
     }
   }

   // Finally, find the largest gap between the merged ranges.
   // The final bounding box will be the inverse of this gap.
   for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
     b = merged[i];
     if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];
   }
 }

 ranges = range = null;

 return lambda0$1 === Infinity || phi0 === Infinity
     ? [[NaN, NaN], [NaN, NaN]]
     : [[lambda0$1, phi0], [lambda1, phi1]];

};

var W0; var W1; var X0; var Y0; var Z0; var X1; var Y1; var Z1; var X2; var Y2; var Z2; var lambda00$2; var phi00$2; var x0; var y0; var z0; // previous point

var centroidStream = {

 sphere: noop$1,
 point: centroidPoint,
 lineStart: centroidLineStart,
 lineEnd: centroidLineEnd,
 polygonStart: function() {
   centroidStream.lineStart = centroidRingStart;
   centroidStream.lineEnd = centroidRingEnd;
 },
 polygonEnd: function() {
   centroidStream.lineStart = centroidLineStart;
   centroidStream.lineEnd = centroidLineEnd;
 }

};

// Arithmetic mean of Cartesian vectors. function centroidPoint(lambda, phi) {

 lambda *= radians, phi *= radians;
 var cosPhi = cos$1(phi);
 centroidPointCartesian(cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi));

}

function centroidPointCartesian(x, y, z) {

 ++W0;
 X0 += (x - X0) / W0;
 Y0 += (y - Y0) / W0;
 Z0 += (z - Z0) / W0;

}

function centroidLineStart() {

 centroidStream.point = centroidLinePointFirst;

}

function centroidLinePointFirst(lambda, phi) {

 lambda *= radians, phi *= radians;
 var cosPhi = cos$1(phi);
 x0 = cosPhi * cos$1(lambda);
 y0 = cosPhi * sin$1(lambda);
 z0 = sin$1(phi);
 centroidStream.point = centroidLinePoint;
 centroidPointCartesian(x0, y0, z0);

}

function centroidLinePoint(lambda, phi) {

 lambda *= radians, phi *= radians;
 var cosPhi = cos$1(phi),
     x = cosPhi * cos$1(lambda),
     y = cosPhi * sin$1(lambda),
     z = sin$1(phi),
     w = atan2(sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
 W1 += w;
 X1 += w * (x0 + (x0 = x));
 Y1 += w * (y0 + (y0 = y));
 Z1 += w * (z0 + (z0 = z));
 centroidPointCartesian(x0, y0, z0);

}

function centroidLineEnd() {

 centroidStream.point = centroidPoint;

}

// See J. E. Brock, The Inertia Tensor for a Spherical Triangle, // J. Applied Mechanics 42, 239 (1975). function centroidRingStart() {

 centroidStream.point = centroidRingPointFirst;

}

function centroidRingEnd() {

 centroidRingPoint(lambda00$2, phi00$2);
 centroidStream.point = centroidPoint;

}

function centroidRingPointFirst(lambda, phi) {

 lambda00$2 = lambda, phi00$2 = phi;
 lambda *= radians, phi *= radians;
 centroidStream.point = centroidRingPoint;
 var cosPhi = cos$1(phi);
 x0 = cosPhi * cos$1(lambda);
 y0 = cosPhi * sin$1(lambda);
 z0 = sin$1(phi);
 centroidPointCartesian(x0, y0, z0);

}

function centroidRingPoint(lambda, phi) {

 lambda *= radians, phi *= radians;
 var cosPhi = cos$1(phi),
     x = cosPhi * cos$1(lambda),
     y = cosPhi * sin$1(lambda),
     z = sin$1(phi),
     cx = y0 * z - z0 * y,
     cy = z0 * x - x0 * z,
     cz = x0 * y - y0 * x,
     m = sqrt(cx * cx + cy * cy + cz * cz),
     w = asin(m), // line weight = angle
     v = m && -w / m; // area weight multiplier
 X2 += v * cx;
 Y2 += v * cy;
 Z2 += v * cz;
 W1 += w;
 X1 += w * (x0 + (x0 = x));
 Y1 += w * (y0 + (y0 = y));
 Z1 += w * (z0 + (z0 = z));
 centroidPointCartesian(x0, y0, z0);

}

var centroid = function(object) {

 W0 = W1 =
 X0 = Y0 = Z0 =
 X1 = Y1 = Z1 =
 X2 = Y2 = Z2 = 0;
 geoStream(object, centroidStream);

 var x = X2,
     y = Y2,
     z = Z2,
     m = x * x + y * y + z * z;

 // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
 if (m < epsilon2$1) {
   x = X1, y = Y1, z = Z1;
   // If the feature has zero length, fall back to arithmetic mean of point vectors.
   if (W1 < epsilon$2) x = X0, y = Y0, z = Z0;
   m = x * x + y * y + z * z;
   // If the feature still has an undefined ccentroid, then return.
   if (m < epsilon2$1) return [NaN, NaN];
 }

 return [atan2(y, x) * degrees$1, asin(z / sqrt(m)) * degrees$1];

};

var constant$7 = function(x) {

 return function() {
   return x;
 };

};

var compose = function(a, b) {

 function compose(x, y) {
   return x = a(x, y), b(x[0], x[1]);
 }

 if (a.invert && b.invert) compose.invert = function(x, y) {
   return x = b.invert(x, y), x && a.invert(x[0], x[1]);
 };

 return compose;

};

function rotationIdentity(lambda, phi) {

 return [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi];

}

rotationIdentity.invert = rotationIdentity;

function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {

 return (deltaLambda %= tau$3) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma))
   : rotationLambda(deltaLambda))
   : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma)
   : rotationIdentity);

}

function forwardRotationLambda(deltaLambda) {

 return function(lambda, phi) {
   return lambda += deltaLambda, [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi];
 };

}

function rotationLambda(deltaLambda) {

 var rotation = forwardRotationLambda(deltaLambda);
 rotation.invert = forwardRotationLambda(-deltaLambda);
 return rotation;

}

function rotationPhiGamma(deltaPhi, deltaGamma) {

 var cosDeltaPhi = cos$1(deltaPhi),
     sinDeltaPhi = sin$1(deltaPhi),
     cosDeltaGamma = cos$1(deltaGamma),
     sinDeltaGamma = sin$1(deltaGamma);

 function rotation(lambda, phi) {
   var cosPhi = cos$1(phi),
       x = cos$1(lambda) * cosPhi,
       y = sin$1(lambda) * cosPhi,
       z = sin$1(phi),
       k = z * cosDeltaPhi + x * sinDeltaPhi;
   return [
     atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),
     asin(k * cosDeltaGamma + y * sinDeltaGamma)
   ];
 }

 rotation.invert = function(lambda, phi) {
   var cosPhi = cos$1(phi),
       x = cos$1(lambda) * cosPhi,
       y = sin$1(lambda) * cosPhi,
       z = sin$1(phi),
       k = z * cosDeltaGamma - y * sinDeltaGamma;
   return [
     atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),
     asin(k * cosDeltaPhi - x * sinDeltaPhi)
   ];
 };

 return rotation;

}

var rotation = function(rotate) {

 rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);

 function forward(coordinates) {
   coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
   return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
 }

 forward.invert = function(coordinates) {
   coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
   return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
 };

 return forward;

};

// Generates a circle centered at [0°, 0°], with a given radius and precision. function circleStream(stream, radius, delta, direction, t0, t1) {

 if (!delta) return;
 var cosRadius = cos$1(radius),
     sinRadius = sin$1(radius),
     step = direction * delta;
 if (t0 == null) {
   t0 = radius + direction * tau$3;
   t1 = radius - step / 2;
 } else {
   t0 = circleRadius(cosRadius, t0);
   t1 = circleRadius(cosRadius, t1);
   if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau$3;
 }
 for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
   point = spherical([cosRadius, -sinRadius * cos$1(t), -sinRadius * sin$1(t)]);
   stream.point(point[0], point[1]);
 }

}

// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0]. function circleRadius(cosRadius, point) {

 point = cartesian(point), point[0] -= cosRadius;
 cartesianNormalizeInPlace(point);
 var radius = acos(-point[1]);
 return ((-point[2] < 0 ? -radius : radius) + tau$3 - epsilon$2) % tau$3;

}

var circle = function() {

 var center = constant$7([0, 0]),
     radius = constant$7(90),
     precision = constant$7(6),
     ring,
     rotate,
     stream = {point: point};

 function point(x, y) {
   ring.push(x = rotate(x, y));
   x[0] *= degrees$1, x[1] *= degrees$1;
 }

 function circle() {
   var c = center.apply(this, arguments),
       r = radius.apply(this, arguments) * radians,
       p = precision.apply(this, arguments) * radians;
   ring = [];
   rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert;
   circleStream(stream, r, p, 1);
   c = {type: "Polygon", coordinates: [ring]};
   ring = rotate = null;
   return c;
 }

 circle.center = function(_) {
   return arguments.length ? (center = typeof _ === "function" ? _ : constant$7([+_[0], +_[1]]), circle) : center;
 };

 circle.radius = function(_) {
   return arguments.length ? (radius = typeof _ === "function" ? _ : constant$7(+_), circle) : radius;
 };

 circle.precision = function(_) {
   return arguments.length ? (precision = typeof _ === "function" ? _ : constant$7(+_), circle) : precision;
 };

 return circle;

};

var clipBuffer = function() {

 var lines = [],
     line;
 return {
   point: function(x, y) {
     line.push([x, y]);
   },
   lineStart: function() {
     lines.push(line = []);
   },
   lineEnd: noop$1,
   rejoin: function() {
     if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
   },
   result: function() {
     var result = lines;
     lines = [];
     line = null;
     return result;
   }
 };

};

var pointEqual = function(a, b) {

 return abs(a[0] - b[0]) < epsilon$2 && abs(a[1] - b[1]) < epsilon$2;

};

function Intersection(point, points, other, entry) {

 this.x = point;
 this.z = points;
 this.o = other; // another intersection
 this.e = entry; // is an entry?
 this.v = false; // visited
 this.n = this.p = null; // next & previous

}

// A generalized polygon clipping algorithm: given a polygon that has been cut // into its visible line segments, and rejoins the segments by interpolating // along the clip edge. var clipRejoin = function(segments, compareIntersection, startInside, interpolate, stream) {

 var subject = [],
     clip = [],
     i,
     n;

 segments.forEach(function(segment) {
   if ((n = segment.length - 1) <= 0) return;
   var n, p0 = segment[0], p1 = segment[n], x;

   // If the first and last points of a segment are coincident, then treat as a
   // closed ring. TODO if all rings are closed, then the winding order of the
   // exterior ring should be checked.
   if (pointEqual(p0, p1)) {
     stream.lineStart();
     for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]);
     stream.lineEnd();
     return;
   }

   subject.push(x = new Intersection(p0, segment, null, true));
   clip.push(x.o = new Intersection(p0, null, x, false));
   subject.push(x = new Intersection(p1, segment, null, false));
   clip.push(x.o = new Intersection(p1, null, x, true));
 });

 if (!subject.length) return;

 clip.sort(compareIntersection);
 link$1(subject);
 link$1(clip);

 for (i = 0, n = clip.length; i < n; ++i) {
   clip[i].e = startInside = !startInside;
 }

 var start = subject[0],
     points,
     point;

 while (1) {
   // Find first unvisited intersection.
   var current = start,
       isSubject = true;
   while (current.v) if ((current = current.n) === start) return;
   points = current.z;
   stream.lineStart();
   do {
     current.v = current.o.v = true;
     if (current.e) {
       if (isSubject) {
         for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]);
       } else {
         interpolate(current.x, current.n.x, 1, stream);
       }
       current = current.n;
     } else {
       if (isSubject) {
         points = current.p.z;
         for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]);
       } else {
         interpolate(current.x, current.p.x, -1, stream);
       }
       current = current.p;
     }
     current = current.o;
     points = current.z;
     isSubject = !isSubject;
   } while (!current.v);
   stream.lineEnd();
 }

};

function link$1(array) {

 if (!(n = array.length)) return;
 var n,
     i = 0,
     a = array[0],
     b;
 while (++i < n) {
   a.n = b = array[i];
   b.p = a;
   a = b;
 }
 a.n = b = array[0];
 b.p = a;

}

var sum$1 = adder();

var polygonContains = function(polygon, point) {

 var lambda = point[0],
     phi = point[1],
     normal = [sin$1(lambda), -cos$1(lambda), 0],
     angle = 0,
     winding = 0;

 sum$1.reset();

 for (var i = 0, n = polygon.length; i < n; ++i) {
   if (!(m = (ring = polygon[i]).length)) continue;
   var ring,
       m,
       point0 = ring[m - 1],
       lambda0 = point0[0],
       phi0 = point0[1] / 2 + quarterPi,
       sinPhi0 = sin$1(phi0),
       cosPhi0 = cos$1(phi0);

   for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
     var point1 = ring[j],
         lambda1 = point1[0],
         phi1 = point1[1] / 2 + quarterPi,
         sinPhi1 = sin$1(phi1),
         cosPhi1 = cos$1(phi1),
         delta = lambda1 - lambda0,
         sign$$1 = delta >= 0 ? 1 : -1,
         absDelta = sign$$1 * delta,
         antimeridian = absDelta > pi$3,
         k = sinPhi0 * sinPhi1;

     sum$1.add(atan2(k * sign$$1 * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta)));
     angle += antimeridian ? delta + sign$$1 * tau$3 : delta;

     // Are the longitudes either side of the point’s meridian (lambda),
     // and are the latitudes smaller than the parallel (phi)?
     if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
       var arc = cartesianCross(cartesian(point0), cartesian(point1));
       cartesianNormalizeInPlace(arc);
       var intersection = cartesianCross(normal, arc);
       cartesianNormalizeInPlace(intersection);
       var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);
       if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
         winding += antimeridian ^ delta >= 0 ? 1 : -1;
       }
     }
   }
 }

 // First, determine whether the South pole is inside or outside:
 //
 // It is inside if:
 // * the polygon winds around it in a clockwise direction.
 // * the polygon does not (cumulatively) wind around it, but has a negative
 //   (counter-clockwise) area.
 //
 // Second, count the (signed) number of times a segment crosses a lambda
 // from the point to the South pole.  If it is zero, then the point is the
 // same side as the South pole.

 return (angle < -epsilon$2 || angle < epsilon$2 && sum$1 < -epsilon$2) ^ (winding & 1);

};

var clip = function(pointVisible, clipLine, interpolate, start) {

 return function(sink) {
   var line = clipLine(sink),
       ringBuffer = clipBuffer(),
       ringSink = clipLine(ringBuffer),
       polygonStarted = false,
       polygon,
       segments,
       ring;

   var clip = {
     point: point,
     lineStart: lineStart,
     lineEnd: lineEnd,
     polygonStart: function() {
       clip.point = pointRing;
       clip.lineStart = ringStart;
       clip.lineEnd = ringEnd;
       segments = [];
       polygon = [];
     },
     polygonEnd: function() {
       clip.point = point;
       clip.lineStart = lineStart;
       clip.lineEnd = lineEnd;
       segments = merge(segments);
       var startInside = polygonContains(polygon, start);
       if (segments.length) {
         if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
         clipRejoin(segments, compareIntersection, startInside, interpolate, sink);
       } else if (startInside) {
         if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
         sink.lineStart();
         interpolate(null, null, 1, sink);
         sink.lineEnd();
       }
       if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
       segments = polygon = null;
     },
     sphere: function() {
       sink.polygonStart();
       sink.lineStart();
       interpolate(null, null, 1, sink);
       sink.lineEnd();
       sink.polygonEnd();
     }
   };

   function point(lambda, phi) {
     if (pointVisible(lambda, phi)) sink.point(lambda, phi);
   }

   function pointLine(lambda, phi) {
     line.point(lambda, phi);
   }

   function lineStart() {
     clip.point = pointLine;
     line.lineStart();
   }

   function lineEnd() {
     clip.point = point;
     line.lineEnd();
   }

   function pointRing(lambda, phi) {
     ring.push([lambda, phi]);
     ringSink.point(lambda, phi);
   }

   function ringStart() {
     ringSink.lineStart();
     ring = [];
   }

   function ringEnd() {
     pointRing(ring[0][0], ring[0][1]);
     ringSink.lineEnd();

     var clean = ringSink.clean(),
         ringSegments = ringBuffer.result(),
         i, n = ringSegments.length, m,
         segment,
         point;

     ring.pop();
     polygon.push(ring);
     ring = null;

     if (!n) return;

     // No intersections.
     if (clean & 1) {
       segment = ringSegments[0];
       if ((m = segment.length - 1) > 0) {
         if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
         sink.lineStart();
         for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]);
         sink.lineEnd();
       }
       return;
     }

     // Rejoin connected segments.
     // TODO reuse ringBuffer.rejoin()?
     if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));

     segments.push(ringSegments.filter(validSegment));
   }

   return clip;
 };

};

function validSegment(segment) {

 return segment.length > 1;

}

// Intersections are sorted along the clip edge. For both antimeridian cutting // and circle clipping, the same comparison is used. function compareIntersection(a, b) {

 return ((a = a.x)[0] < 0 ? a[1] - halfPi$2 - epsilon$2 : halfPi$2 - a[1])
      - ((b = b.x)[0] < 0 ? b[1] - halfPi$2 - epsilon$2 : halfPi$2 - b[1]);

}

var clipAntimeridian = clip(

 function() { return true; },
 clipAntimeridianLine,
 clipAntimeridianInterpolate,
 [-pi$3, -halfPi$2]

);

// Takes a line and cuts into visible segments. Return values: 0 - there were // intersections or the line was empty; 1 - no intersections; 2 - there were // intersections, and the first and last segments should be rejoined. function clipAntimeridianLine(stream) {

 var lambda0 = NaN,
     phi0 = NaN,
     sign0 = NaN,
     clean; // no intersections

 return {
   lineStart: function() {
     stream.lineStart();
     clean = 1;
   },
   point: function(lambda1, phi1) {
     var sign1 = lambda1 > 0 ? pi$3 : -pi$3,
         delta = abs(lambda1 - lambda0);
     if (abs(delta - pi$3) < epsilon$2) { // line crosses a pole
       stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi$2 : -halfPi$2);
       stream.point(sign0, phi0);
       stream.lineEnd();
       stream.lineStart();
       stream.point(sign1, phi0);
       stream.point(lambda1, phi0);
       clean = 0;
     } else if (sign0 !== sign1 && delta >= pi$3) { // line crosses antimeridian
       if (abs(lambda0 - sign0) < epsilon$2) lambda0 -= sign0 * epsilon$2; // handle degeneracies
       if (abs(lambda1 - sign1) < epsilon$2) lambda1 -= sign1 * epsilon$2;
       phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
       stream.point(sign0, phi0);
       stream.lineEnd();
       stream.lineStart();
       stream.point(sign1, phi0);
       clean = 0;
     }
     stream.point(lambda0 = lambda1, phi0 = phi1);
     sign0 = sign1;
   },
   lineEnd: function() {
     stream.lineEnd();
     lambda0 = phi0 = NaN;
   },
   clean: function() {
     return 2 - clean; // if intersections, rejoin first and last segments
   }
 };

}

function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {

 var cosPhi0,
     cosPhi1,
     sinLambda0Lambda1 = sin$1(lambda0 - lambda1);
 return abs(sinLambda0Lambda1) > epsilon$2
     ? atan((sin$1(phi0) * (cosPhi1 = cos$1(phi1)) * sin$1(lambda1)
         - sin$1(phi1) * (cosPhi0 = cos$1(phi0)) * sin$1(lambda0))
         / (cosPhi0 * cosPhi1 * sinLambda0Lambda1))
     : (phi0 + phi1) / 2;

}

function clipAntimeridianInterpolate(from, to, direction, stream) {

 var phi;
 if (from == null) {
   phi = direction * halfPi$2;
   stream.point(-pi$3, phi);
   stream.point(0, phi);
   stream.point(pi$3, phi);
   stream.point(pi$3, 0);
   stream.point(pi$3, -phi);
   stream.point(0, -phi);
   stream.point(-pi$3, -phi);
   stream.point(-pi$3, 0);
   stream.point(-pi$3, phi);
 } else if (abs(from[0] - to[0]) > epsilon$2) {
   var lambda = from[0] < to[0] ? pi$3 : -pi$3;
   phi = direction * lambda / 2;
   stream.point(-lambda, phi);
   stream.point(0, phi);
   stream.point(lambda, phi);
 } else {
   stream.point(to[0], to[1]);
 }

}

var clipCircle = function(radius) {

 var cr = cos$1(radius),
     delta = 6 * radians,
     smallRadius = cr > 0,
     notHemisphere = abs(cr) > epsilon$2; // TODO optimise for this common case

 function interpolate(from, to, direction, stream) {
   circleStream(stream, radius, delta, direction, from, to);
 }

 function visible(lambda, phi) {
   return cos$1(lambda) * cos$1(phi) > cr;
 }

 // Takes a line and cuts into visible segments. Return values used for polygon
 // clipping: 0 - there were intersections or the line was empty; 1 - no
 // intersections 2 - there were intersections, and the first and last segments
 // should be rejoined.
 function clipLine(stream) {
   var point0, // previous point
       c0, // code for previous point
       v0, // visibility of previous point
       v00, // visibility of first point
       clean; // no intersections
   return {
     lineStart: function() {
       v00 = v0 = false;
       clean = 1;
     },
     point: function(lambda, phi) {
       var point1 = [lambda, phi],
           point2,
           v = visible(lambda, phi),
           c = smallRadius
             ? v ? 0 : code(lambda, phi)
             : v ? code(lambda + (lambda < 0 ? pi$3 : -pi$3), phi) : 0;
       if (!point0 && (v00 = v0 = v)) stream.lineStart();
       // Handle degeneracies.
       // TODO ignore if not clipping polygons.
       if (v !== v0) {
         point2 = intersect(point0, point1);
         if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2)) {
           point1[0] += epsilon$2;
           point1[1] += epsilon$2;
           v = visible(point1[0], point1[1]);
         }
       }
       if (v !== v0) {
         clean = 0;
         if (v) {
           // outside going in
           stream.lineStart();
           point2 = intersect(point1, point0);
           stream.point(point2[0], point2[1]);
         } else {
           // inside going out
           point2 = intersect(point0, point1);
           stream.point(point2[0], point2[1]);
           stream.lineEnd();
         }
         point0 = point2;
       } else if (notHemisphere && point0 && smallRadius ^ v) {
         var t;
         // If the codes for two points are different, or are both zero,
         // and there this segment intersects with the small circle.
         if (!(c & c0) && (t = intersect(point1, point0, true))) {
           clean = 0;
           if (smallRadius) {
             stream.lineStart();
             stream.point(t[0][0], t[0][1]);
             stream.point(t[1][0], t[1][1]);
             stream.lineEnd();
           } else {
             stream.point(t[1][0], t[1][1]);
             stream.lineEnd();
             stream.lineStart();
             stream.point(t[0][0], t[0][1]);
           }
         }
       }
       if (v && (!point0 || !pointEqual(point0, point1))) {
         stream.point(point1[0], point1[1]);
       }
       point0 = point1, v0 = v, c0 = c;
     },
     lineEnd: function() {
       if (v0) stream.lineEnd();
       point0 = null;
     },
     // Rejoin first and last segments if there were intersections and the first
     // and last points were visible.
     clean: function() {
       return clean | ((v00 && v0) << 1);
     }
   };
 }

 // Intersects the great circle between a and b with the clip circle.
 function intersect(a, b, two) {
   var pa = cartesian(a),
       pb = cartesian(b);

   // We have two planes, n1.p = d1 and n2.p = d2.
   // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
   var n1 = [1, 0, 0], // normal
       n2 = cartesianCross(pa, pb),
       n2n2 = cartesianDot(n2, n2),
       n1n2 = n2[0], // cartesianDot(n1, n2),
       determinant = n2n2 - n1n2 * n1n2;

   // Two polar points.
   if (!determinant) return !two && a;

   var c1 =  cr * n2n2 / determinant,
       c2 = -cr * n1n2 / determinant,
       n1xn2 = cartesianCross(n1, n2),
       A = cartesianScale(n1, c1),
       B = cartesianScale(n2, c2);
   cartesianAddInPlace(A, B);

   // Solve |p(t)|^2 = 1.
   var u = n1xn2,
       w = cartesianDot(A, u),
       uu = cartesianDot(u, u),
       t2 = w * w - uu * (cartesianDot(A, A) - 1);

   if (t2 < 0) return;

   var t = sqrt(t2),
       q = cartesianScale(u, (-w - t) / uu);
   cartesianAddInPlace(q, A);
   q = spherical(q);

   if (!two) return q;

   // Two intersection points.
   var lambda0 = a[0],
       lambda1 = b[0],
       phi0 = a[1],
       phi1 = b[1],
       z;

   if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;

   var delta = lambda1 - lambda0,
       polar = abs(delta - pi$3) < epsilon$2,
       meridian = polar || delta < epsilon$2;

   if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z;

   // Check that the first point is between a and b.
   if (meridian
       ? polar
         ? phi0 + phi1 > 0 ^ q[1] < (abs(q[0] - lambda0) < epsilon$2 ? phi0 : phi1)
         : phi0 <= q[1] && q[1] <= phi1
       : delta > pi$3 ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
     var q1 = cartesianScale(u, (-w + t) / uu);
     cartesianAddInPlace(q1, A);
     return [q, spherical(q1)];
   }
 }

 // Generates a 4-bit vector representing the location of a point relative to
 // the small circle's bounding box.
 function code(lambda, phi) {
   var r = smallRadius ? radius : pi$3 - radius,
       code = 0;
   if (lambda < -r) code |= 1; // left
   else if (lambda > r) code |= 2; // right
   if (phi < -r) code |= 4; // below
   else if (phi > r) code |= 8; // above
   return code;
 }

 return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi$3, radius - pi$3]);

};

var clipLine = function(a, b, x0, y0, x1, y1) {

 var ax = a[0],
     ay = a[1],
     bx = b[0],
     by = b[1],
     t0 = 0,
     t1 = 1,
     dx = bx - ax,
     dy = by - ay,
     r;

 r = x0 - ax;
 if (!dx && r > 0) return;
 r /= dx;
 if (dx < 0) {
   if (r < t0) return;
   if (r < t1) t1 = r;
 } else if (dx > 0) {
   if (r > t1) return;
   if (r > t0) t0 = r;
 }

 r = x1 - ax;
 if (!dx && r < 0) return;
 r /= dx;
 if (dx < 0) {
   if (r > t1) return;
   if (r > t0) t0 = r;
 } else if (dx > 0) {
   if (r < t0) return;
   if (r < t1) t1 = r;
 }

 r = y0 - ay;
 if (!dy && r > 0) return;
 r /= dy;
 if (dy < 0) {
   if (r < t0) return;
   if (r < t1) t1 = r;
 } else if (dy > 0) {
   if (r > t1) return;
   if (r > t0) t0 = r;
 }

 r = y1 - ay;
 if (!dy && r < 0) return;
 r /= dy;
 if (dy < 0) {
   if (r > t1) return;
   if (r > t0) t0 = r;
 } else if (dy > 0) {
   if (r < t0) return;
   if (r < t1) t1 = r;
 }

 if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
 if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
 return true;

};

var clipMax = 1e9; var clipMin = -clipMax;

// TODO Use d3-polygon’s polygonContains here for the ring check? // TODO Eliminate duplicate buffering in clipBuffer and polygon.push?

function clipRectangle(x0, y0, x1, y1) {

 function visible(x, y) {
   return x0 <= x && x <= x1 && y0 <= y && y <= y1;
 }

 function interpolate(from, to, direction, stream) {
   var a = 0, a1 = 0;
   if (from == null
       || (a = corner(from, direction)) !== (a1 = corner(to, direction))
       || comparePoint(from, to) < 0 ^ direction > 0) {
     do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
     while ((a = (a + direction + 4) % 4) !== a1);
   } else {
     stream.point(to[0], to[1]);
   }
 }

 function corner(p, direction) {
   return abs(p[0] - x0) < epsilon$2 ? direction > 0 ? 0 : 3
       : abs(p[0] - x1) < epsilon$2 ? direction > 0 ? 2 : 1
       : abs(p[1] - y0) < epsilon$2 ? direction > 0 ? 1 : 0
       : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
 }

 function compareIntersection(a, b) {
   return comparePoint(a.x, b.x);
 }

 function comparePoint(a, b) {
   var ca = corner(a, 1),
       cb = corner(b, 1);
   return ca !== cb ? ca - cb
       : ca === 0 ? b[1] - a[1]
       : ca === 1 ? a[0] - b[0]
       : ca === 2 ? a[1] - b[1]
       : b[0] - a[0];
 }

 return function(stream) {
   var activeStream = stream,
       bufferStream = clipBuffer(),
       segments,
       polygon,
       ring,
       x__, y__, v__, // first point
       x_, y_, v_, // previous point
       first,
       clean;

   var clipStream = {
     point: point,
     lineStart: lineStart,
     lineEnd: lineEnd,
     polygonStart: polygonStart,
     polygonEnd: polygonEnd
   };

   function point(x, y) {
     if (visible(x, y)) activeStream.point(x, y);
   }

   function polygonInside() {
     var winding = 0;

     for (var i = 0, n = polygon.length; i < n; ++i) {
       for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
         a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
         if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding; }
         else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding; }
       }
     }

     return winding;
   }

   // Buffer geometry within a polygon and then clip it en masse.
   function polygonStart() {
     activeStream = bufferStream, segments = [], polygon = [], clean = true;
   }

   function polygonEnd() {
     var startInside = polygonInside(),
         cleanInside = clean && startInside,
         visible = (segments = merge(segments)).length;
     if (cleanInside || visible) {
       stream.polygonStart();
       if (cleanInside) {
         stream.lineStart();
         interpolate(null, null, 1, stream);
         stream.lineEnd();
       }
       if (visible) {
         clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
       }
       stream.polygonEnd();
     }
     activeStream = stream, segments = polygon = ring = null;
   }

   function lineStart() {
     clipStream.point = linePoint;
     if (polygon) polygon.push(ring = []);
     first = true;
     v_ = false;
     x_ = y_ = NaN;
   }

   // TODO rather than special-case polygons, simply handle them separately.
   // Ideally, coincident intersection points should be jittered to avoid
   // clipping issues.
   function lineEnd() {
     if (segments) {
       linePoint(x__, y__);
       if (v__ && v_) bufferStream.rejoin();
       segments.push(bufferStream.result());
     }
     clipStream.point = point;
     if (v_) activeStream.lineEnd();
   }

   function linePoint(x, y) {
     var v = visible(x, y);
     if (polygon) ring.push([x, y]);
     if (first) {
       x__ = x, y__ = y, v__ = v;
       first = false;
       if (v) {
         activeStream.lineStart();
         activeStream.point(x, y);
       }
     } else {
       if (v && v_) activeStream.point(x, y);
       else {
         var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
             b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
         if (clipLine(a, b, x0, y0, x1, y1)) {
           if (!v_) {
             activeStream.lineStart();
             activeStream.point(a[0], a[1]);
           }
           activeStream.point(b[0], b[1]);
           if (!v) activeStream.lineEnd();
           clean = false;
         } else if (v) {
           activeStream.lineStart();
           activeStream.point(x, y);
           clean = false;
         }
       }
     }
     x_ = x, y_ = y, v_ = v;
   }

   return clipStream;
 };

}

var extent$1 = function() {

 var x0 = 0,
     y0 = 0,
     x1 = 960,
     y1 = 500,
     cache,
     cacheStream,
     clip;

 return clip = {
   stream: function(stream) {
     return cache && cacheStream === stream ? cache : cache = clipRectangle(x0, y0, x1, y1)(cacheStream = stream);
   },
   extent: function(_) {
     return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [[x0, y0], [x1, y1]];
   }
 };

};

var lengthSum = adder(); var lambda0$2; var sinPhi0$1; var cosPhi0$1;

var lengthStream = {

 sphere: noop$1,
 point: noop$1,
 lineStart: lengthLineStart,
 lineEnd: noop$1,
 polygonStart: noop$1,
 polygonEnd: noop$1

};

function lengthLineStart() {

 lengthStream.point = lengthPointFirst;
 lengthStream.lineEnd = lengthLineEnd;

}

function lengthLineEnd() {

 lengthStream.point = lengthStream.lineEnd = noop$1;

}

function lengthPointFirst(lambda, phi) {

 lambda *= radians, phi *= radians;
 lambda0$2 = lambda, sinPhi0$1 = sin$1(phi), cosPhi0$1 = cos$1(phi);
 lengthStream.point = lengthPoint;

}

function lengthPoint(lambda, phi) {

 lambda *= radians, phi *= radians;
 var sinPhi = sin$1(phi),
     cosPhi = cos$1(phi),
     delta = abs(lambda - lambda0$2),
     cosDelta = cos$1(delta),
     sinDelta = sin$1(delta),
     x = cosPhi * sinDelta,
     y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,
     z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;
 lengthSum.add(atan2(sqrt(x * x + y * y), z));
 lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;

}

var length$1 = function(object) {

 lengthSum.reset();
 geoStream(object, lengthStream);
 return +lengthSum;

};

var coordinates = [null, null]; var object$1 = {type: "LineString", coordinates: coordinates};

var distance = function(a, b) {

 coordinates[0] = a;
 coordinates[1] = b;
 return length$1(object$1);

};

var containsObjectType = {

 Feature: function(object, point) {
   return containsGeometry(object.geometry, point);
 },
 FeatureCollection: function(object, point) {
   var features = object.features, i = -1, n = features.length;
   while (++i < n) if (containsGeometry(features[i].geometry, point)) return true;
   return false;
 }

};

var containsGeometryType = {

 Sphere: function() {
   return true;
 },
 Point: function(object, point) {
   return containsPoint(object.coordinates, point);
 },
 MultiPoint: function(object, point) {
   var coordinates = object.coordinates, i = -1, n = coordinates.length;
   while (++i < n) if (containsPoint(coordinates[i], point)) return true;
   return false;
 },
 LineString: function(object, point) {
   return containsLine(object.coordinates, point);
 },
 MultiLineString: function(object, point) {
   var coordinates = object.coordinates, i = -1, n = coordinates.length;
   while (++i < n) if (containsLine(coordinates[i], point)) return true;
   return false;
 },
 Polygon: function(object, point) {
   return containsPolygon(object.coordinates, point);
 },
 MultiPolygon: function(object, point) {
   var coordinates = object.coordinates, i = -1, n = coordinates.length;
   while (++i < n) if (containsPolygon(coordinates[i], point)) return true;
   return false;
 },
 GeometryCollection: function(object, point) {
   var geometries = object.geometries, i = -1, n = geometries.length;
   while (++i < n) if (containsGeometry(geometries[i], point)) return true;
   return false;
 }

};

function containsGeometry(geometry, point) {

 return geometry && containsGeometryType.hasOwnProperty(geometry.type)
     ? containsGeometryType[geometry.type](geometry, point)
     : false;

}

function containsPoint(coordinates, point) {

 return distance(coordinates, point) === 0;

}

function containsLine(coordinates, point) {

 var ab = distance(coordinates[0], coordinates[1]),
     ao = distance(coordinates[0], point),
     ob = distance(point, coordinates[1]);
 return ao + ob <= ab + epsilon$2;

}

function containsPolygon(coordinates, point) {

 return !!polygonContains(coordinates.map(ringRadians), pointRadians(point));

}

function ringRadians(ring) {

 return ring = ring.map(pointRadians), ring.pop(), ring;

}

function pointRadians(point) {

 return [point[0] * radians, point[1] * radians];

}

var contains = function(object, point) {

 return (object && containsObjectType.hasOwnProperty(object.type)
     ? containsObjectType[object.type]
     : containsGeometry)(object, point);

};

function graticuleX(y0, y1, dy) {

 var y = sequence(y0, y1 - epsilon$2, dy).concat(y1);
 return function(x) { return y.map(function(y) { return [x, y]; }); };

}

function graticuleY(x0, x1, dx) {

 var x = sequence(x0, x1 - epsilon$2, dx).concat(x1);
 return function(y) { return x.map(function(x) { return [x, y]; }); };

}

function graticule() {

 var x1, x0, X1, X0,
     y1, y0, Y1, Y0,
     dx = 10, dy = dx, DX = 90, DY = 360,
     x, y, X, Y,
     precision = 2.5;

 function graticule() {
   return {type: "MultiLineString", coordinates: lines()};
 }

 function lines() {
   return sequence(ceil(X0 / DX) * DX, X1, DX).map(X)
       .concat(sequence(ceil(Y0 / DY) * DY, Y1, DY).map(Y))
       .concat(sequence(ceil(x0 / dx) * dx, x1, dx).filter(function(x) { return abs(x % DX) > epsilon$2; }).map(x))
       .concat(sequence(ceil(y0 / dy) * dy, y1, dy).filter(function(y) { return abs(y % DY) > epsilon$2; }).map(y));
 }

 graticule.lines = function() {
   return lines().map(function(coordinates) { return {type: "LineString", coordinates: coordinates}; });
 };

 graticule.outline = function() {
   return {
     type: "Polygon",
     coordinates: [
       X(X0).concat(
       Y(Y1).slice(1),
       X(X1).reverse().slice(1),
       Y(Y0).reverse().slice(1))
     ]
   };
 };

 graticule.extent = function(_) {
   if (!arguments.length) return graticule.extentMinor();
   return graticule.extentMajor(_).extentMinor(_);
 };

 graticule.extentMajor = function(_) {
   if (!arguments.length) return [[X0, Y0], [X1, Y1]];
   X0 = +_[0][0], X1 = +_[1][0];
   Y0 = +_[0][1], Y1 = +_[1][1];
   if (X0 > X1) _ = X0, X0 = X1, X1 = _;
   if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;
   return graticule.precision(precision);
 };

 graticule.extentMinor = function(_) {
   if (!arguments.length) return [[x0, y0], [x1, y1]];
   x0 = +_[0][0], x1 = +_[1][0];
   y0 = +_[0][1], y1 = +_[1][1];
   if (x0 > x1) _ = x0, x0 = x1, x1 = _;
   if (y0 > y1) _ = y0, y0 = y1, y1 = _;
   return graticule.precision(precision);
 };

 graticule.step = function(_) {
   if (!arguments.length) return graticule.stepMinor();
   return graticule.stepMajor(_).stepMinor(_);
 };

 graticule.stepMajor = function(_) {
   if (!arguments.length) return [DX, DY];
   DX = +_[0], DY = +_[1];
   return graticule;
 };

 graticule.stepMinor = function(_) {
   if (!arguments.length) return [dx, dy];
   dx = +_[0], dy = +_[1];
   return graticule;
 };

 graticule.precision = function(_) {
   if (!arguments.length) return precision;
   precision = +_;
   x = graticuleX(y0, y1, 90);
   y = graticuleY(x0, x1, precision);
   X = graticuleX(Y0, Y1, 90);
   Y = graticuleY(X0, X1, precision);
   return graticule;
 };

 return graticule
     .extentMajor([[-180, -90 + epsilon$2], [180, 90 - epsilon$2]])
     .extentMinor([[-180, -80 - epsilon$2], [180, 80 + epsilon$2]]);

}

function graticule10() {

 return graticule()();

}

var interpolate$1 = function(a, b) {

 var x0 = a[0] * radians,
     y0 = a[1] * radians,
     x1 = b[0] * radians,
     y1 = b[1] * radians,
     cy0 = cos$1(y0),
     sy0 = sin$1(y0),
     cy1 = cos$1(y1),
     sy1 = sin$1(y1),
     kx0 = cy0 * cos$1(x0),
     ky0 = cy0 * sin$1(x0),
     kx1 = cy1 * cos$1(x1),
     ky1 = cy1 * sin$1(x1),
     d = 2 * asin(sqrt(haversin(y1 - y0) + cy0 * cy1 * haversin(x1 - x0))),
     k = sin$1(d);

 var interpolate = d ? function(t) {
   var B = sin$1(t *= d) / k,
       A = sin$1(d - t) / k,
       x = A * kx0 + B * kx1,
       y = A * ky0 + B * ky1,
       z = A * sy0 + B * sy1;
   return [
     atan2(y, x) * degrees$1,
     atan2(z, sqrt(x * x + y * y)) * degrees$1
   ];
 } : function() {
   return [x0 * degrees$1, y0 * degrees$1];
 };

 interpolate.distance = d;

 return interpolate;

};

var identity$4 = function(x) {

 return x;

};

var areaSum$1 = adder(); var areaRingSum$1 = adder(); var x00; var y00; var x0$1; var y0$1;

var areaStream$1 = {

 point: noop$1,
 lineStart: noop$1,
 lineEnd: noop$1,
 polygonStart: function() {
   areaStream$1.lineStart = areaRingStart$1;
   areaStream$1.lineEnd = areaRingEnd$1;
 },
 polygonEnd: function() {
   areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$1;
   areaSum$1.add(abs(areaRingSum$1));
   areaRingSum$1.reset();
 },
 result: function() {
   var area = areaSum$1 / 2;
   areaSum$1.reset();
   return area;
 }

};

function areaRingStart$1() {

 areaStream$1.point = areaPointFirst$1;

}

function areaPointFirst$1(x, y) {

 areaStream$1.point = areaPoint$1;
 x00 = x0$1 = x, y00 = y0$1 = y;

}

function areaPoint$1(x, y) {

 areaRingSum$1.add(y0$1 * x - x0$1 * y);
 x0$1 = x, y0$1 = y;

}

function areaRingEnd$1() {

 areaPoint$1(x00, y00);

}

var x0$2 = Infinity; var y0$2 = x0$2; var x1 = -x0$2; var y1 = x1;

var boundsStream$1 = {

 point: boundsPoint$1,
 lineStart: noop$1,
 lineEnd: noop$1,
 polygonStart: noop$1,
 polygonEnd: noop$1,
 result: function() {
   var bounds = [[x0$2, y0$2], [x1, y1]];
   x1 = y1 = -(y0$2 = x0$2 = Infinity);
   return bounds;
 }

};

function boundsPoint$1(x, y) {

 if (x < x0$2) x0$2 = x;
 if (x > x1) x1 = x;
 if (y < y0$2) y0$2 = y;
 if (y > y1) y1 = y;

}

// TODO Enforce positive area for exterior, negative area for interior?

var X0$1 = 0; var Y0$1 = 0; var Z0$1 = 0; var X1$1 = 0; var Y1$1 = 0; var Z1$1 = 0; var X2$1 = 0; var Y2$1 = 0; var Z2$1 = 0; var x00$1; var y00$1; var x0$3; var y0$3;

var centroidStream$1 = {

 point: centroidPoint$1,
 lineStart: centroidLineStart$1,
 lineEnd: centroidLineEnd$1,
 polygonStart: function() {
   centroidStream$1.lineStart = centroidRingStart$1;
   centroidStream$1.lineEnd = centroidRingEnd$1;
 },
 polygonEnd: function() {
   centroidStream$1.point = centroidPoint$1;
   centroidStream$1.lineStart = centroidLineStart$1;
   centroidStream$1.lineEnd = centroidLineEnd$1;
 },
 result: function() {
   var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1]
       : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1]
       : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1]
       : [NaN, NaN];
   X0$1 = Y0$1 = Z0$1 =
   X1$1 = Y1$1 = Z1$1 =
   X2$1 = Y2$1 = Z2$1 = 0;
   return centroid;
 }

};

function centroidPoint$1(x, y) {

 X0$1 += x;
 Y0$1 += y;
 ++Z0$1;

}

function centroidLineStart$1() {

 centroidStream$1.point = centroidPointFirstLine;

}

function centroidPointFirstLine(x, y) {

 centroidStream$1.point = centroidPointLine;
 centroidPoint$1(x0$3 = x, y0$3 = y);

}

function centroidPointLine(x, y) {

 var dx = x - x0$3, dy = y - y0$3, z = sqrt(dx * dx + dy * dy);
 X1$1 += z * (x0$3 + x) / 2;
 Y1$1 += z * (y0$3 + y) / 2;
 Z1$1 += z;
 centroidPoint$1(x0$3 = x, y0$3 = y);

}

function centroidLineEnd$1() {

 centroidStream$1.point = centroidPoint$1;

}

function centroidRingStart$1() {

 centroidStream$1.point = centroidPointFirstRing;

}

function centroidRingEnd$1() {

 centroidPointRing(x00$1, y00$1);

}

function centroidPointFirstRing(x, y) {

 centroidStream$1.point = centroidPointRing;
 centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);

}

function centroidPointRing(x, y) {

 var dx = x - x0$3,
     dy = y - y0$3,
     z = sqrt(dx * dx + dy * dy);

 X1$1 += z * (x0$3 + x) / 2;
 Y1$1 += z * (y0$3 + y) / 2;
 Z1$1 += z;

 z = y0$3 * x - x0$3 * y;
 X2$1 += z * (x0$3 + x);
 Y2$1 += z * (y0$3 + y);
 Z2$1 += z * 3;
 centroidPoint$1(x0$3 = x, y0$3 = y);

}

function PathContext(context) {

 this._context = context;

}

PathContext.prototype = {

 _radius: 4.5,
 pointRadius: function(_) {
   return this._radius = _, this;
 },
 polygonStart: function() {
   this._line = 0;
 },
 polygonEnd: function() {
   this._line = NaN;
 },
 lineStart: function() {
   this._point = 0;
 },
 lineEnd: function() {
   if (this._line === 0) this._context.closePath();
   this._point = NaN;
 },
 point: function(x, y) {
   switch (this._point) {
     case 0: {
       this._context.moveTo(x, y);
       this._point = 1;
       break;
     }
     case 1: {
       this._context.lineTo(x, y);
       break;
     }
     default: {
       this._context.moveTo(x + this._radius, y);
       this._context.arc(x, y, this._radius, 0, tau$3);
       break;
     }
   }
 },
 result: noop$1

};

var lengthSum$1 = adder(); var lengthRing; var x00$2; var y00$2; var x0$4; var y0$4;

var lengthStream$1 = {

 point: noop$1,
 lineStart: function() {
   lengthStream$1.point = lengthPointFirst$1;
 },
 lineEnd: function() {
   if (lengthRing) lengthPoint$1(x00$2, y00$2);
   lengthStream$1.point = noop$1;
 },
 polygonStart: function() {
   lengthRing = true;
 },
 polygonEnd: function() {
   lengthRing = null;
 },
 result: function() {
   var length = +lengthSum$1;
   lengthSum$1.reset();
   return length;
 }

};

function lengthPointFirst$1(x, y) {

 lengthStream$1.point = lengthPoint$1;
 x00$2 = x0$4 = x, y00$2 = y0$4 = y;

}

function lengthPoint$1(x, y) {

 x0$4 -= x, y0$4 -= y;
 lengthSum$1.add(sqrt(x0$4 * x0$4 + y0$4 * y0$4));
 x0$4 = x, y0$4 = y;

}

function PathString() {

 this._string = [];

}

PathString.prototype = {

 _radius: 4.5,
 _circle: circle$1(4.5),
 pointRadius: function(_) {
   if ((_ = +_) !== this._radius) this._radius = _, this._circle = null;
   return this;
 },
 polygonStart: function() {
   this._line = 0;
 },
 polygonEnd: function() {
   this._line = NaN;
 },
 lineStart: function() {
   this._point = 0;
 },
 lineEnd: function() {
   if (this._line === 0) this._string.push("Z");
   this._point = NaN;
 },
 point: function(x, y) {
   switch (this._point) {
     case 0: {
       this._string.push("M", x, ",", y);
       this._point = 1;
       break;
     }
     case 1: {
       this._string.push("L", x, ",", y);
       break;
     }
     default: {
       if (this._circle == null) this._circle = circle$1(this._radius);
       this._string.push("M", x, ",", y, this._circle);
       break;
     }
   }
 },
 result: function() {
   if (this._string.length) {
     var result = this._string.join("");
     this._string = [];
     return result;
   } else {
     return null;
   }
 }

};

function circle$1(radius) {

 return "m0," + radius
     + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius
     + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius
     + "z";

}

var index$1 = function(projection, context) {

 var pointRadius = 4.5,
     projectionStream,
     contextStream;

 function path(object) {
   if (object) {
     if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
     geoStream(object, projectionStream(contextStream));
   }
   return contextStream.result();
 }

 path.area = function(object) {
   geoStream(object, projectionStream(areaStream$1));
   return areaStream$1.result();
 };

 path.measure = function(object) {
   geoStream(object, projectionStream(lengthStream$1));
   return lengthStream$1.result();
 };

 path.bounds = function(object) {
   geoStream(object, projectionStream(boundsStream$1));
   return boundsStream$1.result();
 };

 path.centroid = function(object) {
   geoStream(object, projectionStream(centroidStream$1));
   return centroidStream$1.result();
 };

 path.projection = function(_) {
   return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection;
 };

 path.context = function(_) {
   if (!arguments.length) return context;
   contextStream = _ == null ? (context = null, new PathString) : new PathContext(context = _);
   if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
   return path;
 };

 path.pointRadius = function(_) {
   if (!arguments.length) return pointRadius;
   pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
   return path;
 };

 return path.projection(projection).context(context);

};

var transform = function(methods) {

 return {
   stream: transformer(methods)
 };

};

function transformer(methods) {

 return function(stream) {
   var s = new TransformStream;
   for (var key in methods) s[key] = methods[key];
   s.stream = stream;
   return s;
 };

}

function TransformStream() {}

TransformStream.prototype = {

 constructor: TransformStream,
 point: function(x, y) { this.stream.point(x, y); },
 sphere: function() { this.stream.sphere(); },
 lineStart: function() { this.stream.lineStart(); },
 lineEnd: function() { this.stream.lineEnd(); },
 polygonStart: function() { this.stream.polygonStart(); },
 polygonEnd: function() { this.stream.polygonEnd(); }

};

function fitExtent(projection, extent, object) {

 var w = extent[1][0] - extent[0][0],
     h = extent[1][1] - extent[0][1],
     clip = projection.clipExtent && projection.clipExtent();

 projection
     .scale(150)
     .translate([0, 0]);

 if (clip != null) projection.clipExtent(null);

 geoStream(object, projection.stream(boundsStream$1));

 var b = boundsStream$1.result(),
     k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
     x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
     y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;

 if (clip != null) projection.clipExtent(clip);

 return projection
     .scale(k * 150)
     .translate([x, y]);

}

function fitSize(projection, size, object) {

 return fitExtent(projection, [[0, 0], size], object);

}

var maxDepth = 16; var cosMinDistance = cos$1(30 * radians); // cos(minimum angular distance)

var resample = function(project, delta2) {

 return +delta2 ? resample$1(project, delta2) : resampleNone(project);

};

function resampleNone(project) {

 return transformer({
   point: function(x, y) {
     x = project(x, y);
     this.stream.point(x[0], x[1]);
   }
 });

}

function resample$1(project, delta2) {

 function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
   var dx = x1 - x0,
       dy = y1 - y0,
       d2 = dx * dx + dy * dy;
   if (d2 > 4 * delta2 && depth--) {
     var a = a0 + a1,
         b = b0 + b1,
         c = c0 + c1,
         m = sqrt(a * a + b * b + c * c),
         phi2 = asin(c /= m),
         lambda2 = abs(abs(c) - 1) < epsilon$2 || abs(lambda0 - lambda1) < epsilon$2 ? (lambda0 + lambda1) / 2 : atan2(b, a),
         p = project(lambda2, phi2),
         x2 = p[0],
         y2 = p[1],
         dx2 = x2 - x0,
         dy2 = y2 - y0,
         dz = dy * dx2 - dx * dy2;
     if (dz * dz / d2 > delta2 // perpendicular projected distance
         || abs((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
         || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance
       resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
       stream.point(x2, y2);
       resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
     }
   }
 }
 return function(stream) {
   var lambda00, x00, y00, a00, b00, c00, // first point
       lambda0, x0, y0, a0, b0, c0; // previous point

   var resampleStream = {
     point: point,
     lineStart: lineStart,
     lineEnd: lineEnd,
     polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },
     polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }
   };

   function point(x, y) {
     x = project(x, y);
     stream.point(x[0], x[1]);
   }

   function lineStart() {
     x0 = NaN;
     resampleStream.point = linePoint;
     stream.lineStart();
   }

   function linePoint(lambda, phi) {
     var c = cartesian([lambda, phi]), p = project(lambda, phi);
     resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
     stream.point(x0, y0);
   }

   function lineEnd() {
     resampleStream.point = point;
     stream.lineEnd();
   }

   function ringStart() {
     lineStart();
     resampleStream.point = ringPoint;
     resampleStream.lineEnd = ringEnd;
   }

   function ringPoint(lambda, phi) {
     linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
     resampleStream.point = linePoint;
   }

   function ringEnd() {
     resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
     resampleStream.lineEnd = lineEnd;
     lineEnd();
   }

   return resampleStream;
 };

}

var transformRadians = transformer({

 point: function(x, y) {
   this.stream.point(x * radians, y * radians);
 }

});

function transformRotate(rotate) {

 return transformer({
   point: function(x, y) {
     var r = rotate(x, y);
     return this.stream.point(r[0], r[1]);
   }
 });

}

function projection(project) {

 return projectionMutator(function() { return project; })();

}

function projectionMutator(projectAt) {

 var project,
     k = 150, // scale
     x = 480, y = 250, // translate
     dx, dy, lambda = 0, phi = 0, // center
     deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, projectRotate, // rotate
     theta = null, preclip = clipAntimeridian, // clip angle
     x0 = null, y0, x1, y1, postclip = identity$4, // clip extent
     delta2 = 0.5, projectResample = resample(projectTransform, delta2), // precision
     cache,
     cacheStream;

 function projection(point) {
   point = projectRotate(point[0] * radians, point[1] * radians);
   return [point[0] * k + dx, dy - point[1] * k];
 }

 function invert(point) {
   point = projectRotate.invert((point[0] - dx) / k, (dy - point[1]) / k);
   return point && [point[0] * degrees$1, point[1] * degrees$1];
 }

 function projectTransform(x, y) {
   return x = project(x, y), [x[0] * k + dx, dy - x[1] * k];
 }

 projection.stream = function(stream) {
   return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
 };

 projection.preclip = function(_) {
   return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
 };

 projection.postclip = function(_) {
   return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
 };

 projection.clipAngle = function(_) {
   return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;
 };

 projection.clipExtent = function(_) {
   return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
 };

 projection.scale = function(_) {
   return arguments.length ? (k = +_, recenter()) : k;
 };

 projection.translate = function(_) {
   return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
 };

 projection.center = function(_) {
   return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];
 };

 projection.rotate = function(_) {
   return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];
 };

 projection.precision = function(_) {
   return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
 };

 projection.fitExtent = function(extent, object) {
   return fitExtent(projection, extent, object);
 };

 projection.fitSize = function(size, object) {
   return fitSize(projection, size, object);
 };

 function recenter() {
   projectRotate = compose(rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma), project);
   var center = project(lambda, phi);
   dx = x - center[0] * k;
   dy = y + center[1] * k;
   return reset();
 }

 function reset() {
   cache = cacheStream = null;
   return projection;
 }

 return function() {
   project = projectAt.apply(this, arguments);
   projection.invert = project.invert && invert;
   return recenter();
 };

}

function conicProjection(projectAt) {

 var phi0 = 0,
     phi1 = pi$3 / 3,
     m = projectionMutator(projectAt),
     p = m(phi0, phi1);

 p.parallels = function(_) {
   return arguments.length ? m(phi0 = _[0] * radians, phi1 = _[1] * radians) : [phi0 * degrees$1, phi1 * degrees$1];
 };

 return p;

}

function cylindricalEqualAreaRaw(phi0) {

 var cosPhi0 = cos$1(phi0);

 function forward(lambda, phi) {
   return [lambda * cosPhi0, sin$1(phi) / cosPhi0];
 }

 forward.invert = function(x, y) {
   return [x / cosPhi0, asin(y * cosPhi0)];
 };

 return forward;

}

function conicEqualAreaRaw(y0, y1) {

 var sy0 = sin$1(y0), n = (sy0 + sin$1(y1)) / 2;

 // Are the parallels symmetrical around the Equator?
 if (abs(n) < epsilon$2) return cylindricalEqualAreaRaw(y0);

 var c = 1 + sy0 * (2 * n - sy0), r0 = sqrt(c) / n;

 function project(x, y) {
   var r = sqrt(c - 2 * n * sin$1(y)) / n;
   return [r * sin$1(x *= n), r0 - r * cos$1(x)];
 }

 project.invert = function(x, y) {
   var r0y = r0 - y;
   return [atan2(x, abs(r0y)) / n * sign(r0y), asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))];
 };

 return project;

}

var conicEqualArea = function() {

 return conicProjection(conicEqualAreaRaw)
     .scale(155.424)
     .center([0, 33.6442]);

};

var albers = function() {

 return conicEqualArea()
     .parallels([29.5, 45.5])
     .scale(1070)
     .translate([480, 250])
     .rotate([96, 0])
     .center([-0.6, 38.7]);

};

// The projections must have mutually exclusive clip regions on the sphere, // as this will avoid emitting interleaving lines and polygons. function multiplex(streams) {

 var n = streams.length;
 return {
   point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); },
   sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); },
   lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); },
   lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); },
   polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); },
   polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); }
 };

}

// A composite projection for the United States, configured by default for // 960×500. The projection also works quite well at 960×600 if you change the // scale to 1285 and adjust the translate accordingly. The set of standard // parallels for each region comes from USGS, which is published here: // http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers var albersUsa = function() {

 var cache,
     cacheStream,
     lower48 = albers(), lower48Point,
     alaska = conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338
     hawaii = conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007
     point, pointStream = {point: function(x, y) { point = [x, y]; }};

 function albersUsa(coordinates) {
   var x = coordinates[0], y = coordinates[1];
   return point = null,
       (lower48Point.point(x, y), point)
       || (alaskaPoint.point(x, y), point)
       || (hawaiiPoint.point(x, y), point);
 }

 albersUsa.invert = function(coordinates) {
   var k = lower48.scale(),
       t = lower48.translate(),
       x = (coordinates[0] - t[0]) / k,
       y = (coordinates[1] - t[1]) / k;
   return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska
       : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii
       : lower48).invert(coordinates);
 };

 albersUsa.stream = function(stream) {
   return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]);
 };

 albersUsa.precision = function(_) {
   if (!arguments.length) return lower48.precision();
   lower48.precision(_), alaska.precision(_), hawaii.precision(_);
   return reset();
 };

 albersUsa.scale = function(_) {
   if (!arguments.length) return lower48.scale();
   lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_);
   return albersUsa.translate(lower48.translate());
 };

 albersUsa.translate = function(_) {
   if (!arguments.length) return lower48.translate();
   var k = lower48.scale(), x = +_[0], y = +_[1];

   lower48Point = lower48
       .translate(_)
       .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]])
       .stream(pointStream);

   alaskaPoint = alaska
       .translate([x - 0.307 * k, y + 0.201 * k])
       .clipExtent([[x - 0.425 * k + epsilon$2, y + 0.120 * k + epsilon$2], [x - 0.214 * k - epsilon$2, y + 0.234 * k - epsilon$2]])
       .stream(pointStream);

   hawaiiPoint = hawaii
       .translate([x - 0.205 * k, y + 0.212 * k])
       .clipExtent([[x - 0.214 * k + epsilon$2, y + 0.166 * k + epsilon$2], [x - 0.115 * k - epsilon$2, y + 0.234 * k - epsilon$2]])
       .stream(pointStream);

   return reset();
 };

 albersUsa.fitExtent = function(extent, object) {
   return fitExtent(albersUsa, extent, object);
 };

 albersUsa.fitSize = function(size, object) {
   return fitSize(albersUsa, size, object);
 };

 function reset() {
   cache = cacheStream = null;
   return albersUsa;
 }

 return albersUsa.scale(1070);

};

function azimuthalRaw(scale) {

 return function(x, y) {
   var cx = cos$1(x),
       cy = cos$1(y),
       k = scale(cx * cy);
   return [
     k * cy * sin$1(x),
     k * sin$1(y)
   ];
 }

}

function azimuthalInvert(angle) {

 return function(x, y) {
   var z = sqrt(x * x + y * y),
       c = angle(z),
       sc = sin$1(c),
       cc = cos$1(c);
   return [
     atan2(x * sc, z * cc),
     asin(z && y * sc / z)
   ];
 }

}

var azimuthalEqualAreaRaw = azimuthalRaw(function(cxcy) {

 return sqrt(2 / (1 + cxcy));

});

azimuthalEqualAreaRaw.invert = azimuthalInvert(function(z) {

 return 2 * asin(z / 2);

});

var azimuthalEqualArea = function() {

 return projection(azimuthalEqualAreaRaw)
     .scale(124.75)
     .clipAngle(180 - 1e-3);

};

var azimuthalEquidistantRaw = azimuthalRaw(function(c) {

 return (c = acos(c)) && c / sin$1(c);

});

azimuthalEquidistantRaw.invert = azimuthalInvert(function(z) {

 return z;

});

var azimuthalEquidistant = function() {

 return projection(azimuthalEquidistantRaw)
     .scale(79.4188)
     .clipAngle(180 - 1e-3);

};

function mercatorRaw(lambda, phi) {

 return [lambda, log(tan((halfPi$2 + phi) / 2))];

}

mercatorRaw.invert = function(x, y) {

 return [x, 2 * atan(exp(y)) - halfPi$2];

};

var mercator = function() {

 return mercatorProjection(mercatorRaw)
     .scale(961 / tau$3);

};

function mercatorProjection(project) {

 var m = projection(project),
     center = m.center,
     scale = m.scale,
     translate = m.translate,
     clipExtent = m.clipExtent,
     x0 = null, y0, x1, y1; // clip extent

 m.scale = function(_) {
   return arguments.length ? (scale(_), reclip()) : scale();
 };

 m.translate = function(_) {
   return arguments.length ? (translate(_), reclip()) : translate();
 };

 m.center = function(_) {
   return arguments.length ? (center(_), reclip()) : center();
 };

 m.clipExtent = function(_) {
   return arguments.length ? ((_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1])), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
 };

 function reclip() {
   var k = pi$3 * scale(),
       t = m(rotation(m.rotate()).invert([0, 0]));
   return clipExtent(x0 == null
       ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw
       ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]]
       : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
 }

 return reclip();

}

function tany(y) {

 return tan((halfPi$2 + y) / 2);

}

function conicConformalRaw(y0, y1) {

 var cy0 = cos$1(y0),
     n = y0 === y1 ? sin$1(y0) : log(cy0 / cos$1(y1)) / log(tany(y1) / tany(y0)),
     f = cy0 * pow(tany(y0), n) / n;

 if (!n) return mercatorRaw;

 function project(x, y) {
   if (f > 0) { if (y < -halfPi$2 + epsilon$2) y = -halfPi$2 + epsilon$2; }
   else { if (y > halfPi$2 - epsilon$2) y = halfPi$2 - epsilon$2; }
   var r = f / pow(tany(y), n);
   return [r * sin$1(n * x), f - r * cos$1(n * x)];
 }

 project.invert = function(x, y) {
   var fy = f - y, r = sign(n) * sqrt(x * x + fy * fy);
   return [atan2(x, abs(fy)) / n * sign(fy), 2 * atan(pow(f / r, 1 / n)) - halfPi$2];
 };

 return project;

}

var conicConformal = function() {

 return conicProjection(conicConformalRaw)
     .scale(109.5)
     .parallels([30, 30]);

};

function equirectangularRaw(lambda, phi) {

 return [lambda, phi];

}

equirectangularRaw.invert = equirectangularRaw;

var equirectangular = function() {

 return projection(equirectangularRaw)
     .scale(152.63);

};

function conicEquidistantRaw(y0, y1) {

 var cy0 = cos$1(y0),
     n = y0 === y1 ? sin$1(y0) : (cy0 - cos$1(y1)) / (y1 - y0),
     g = cy0 / n + y0;

 if (abs(n) < epsilon$2) return equirectangularRaw;

 function project(x, y) {
   var gy = g - y, nx = n * x;
   return [gy * sin$1(nx), g - gy * cos$1(nx)];
 }

 project.invert = function(x, y) {
   var gy = g - y;
   return [atan2(x, abs(gy)) / n * sign(gy), g - sign(n) * sqrt(x * x + gy * gy)];
 };

 return project;

}

var conicEquidistant = function() {

 return conicProjection(conicEquidistantRaw)
     .scale(131.154)
     .center([0, 13.9389]);

};

function gnomonicRaw(x, y) {

 var cy = cos$1(y), k = cos$1(x) * cy;
 return [cy * sin$1(x) / k, sin$1(y) / k];

}

gnomonicRaw.invert = azimuthalInvert(atan);

var gnomonic = function() {

 return projection(gnomonicRaw)
     .scale(144.049)
     .clipAngle(60);

};

function scaleTranslate(kx, ky, tx, ty) {

 return kx === 1 && ky === 1 && tx === 0 && ty === 0 ? identity$4 : transformer({
   point: function(x, y) {
     this.stream.point(x * kx + tx, y * ky + ty);
   }
 });

}

var identity$5 = function() {

 var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, transform$$1 = identity$4, // scale, translate and reflect
     x0 = null, y0, x1, y1, // clip extent
     postclip = identity$4,
     cache,
     cacheStream,
     projection;

 function reset() {
   cache = cacheStream = null;
   return projection;
 }

 return projection = {
   stream: function(stream) {
     return cache && cacheStream === stream ? cache : cache = transform$$1(postclip(cacheStream = stream));
   },
   postclip: function(_) {
     return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
   },
   clipExtent: function(_) {
     return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
   },
   scale: function(_) {
     return arguments.length ? (transform$$1 = scaleTranslate((k = +_) * sx, k * sy, tx, ty), reset()) : k;
   },
   translate: function(_) {
     return arguments.length ? (transform$$1 = scaleTranslate(k * sx, k * sy, tx = +_[0], ty = +_[1]), reset()) : [tx, ty];
   },
   reflectX: function(_) {
     return arguments.length ? (transform$$1 = scaleTranslate(k * (sx = _ ? -1 : 1), k * sy, tx, ty), reset()) : sx < 0;
   },
   reflectY: function(_) {
     return arguments.length ? (transform$$1 = scaleTranslate(k * sx, k * (sy = _ ? -1 : 1), tx, ty), reset()) : sy < 0;
   },
   fitExtent: function(extent, object) {
     return fitExtent(projection, extent, object);
   },
   fitSize: function(size, object) {
     return fitSize(projection, size, object);
   }
 };

};

function naturalEarth1Raw(lambda, phi) {

 var phi2 = phi * phi, phi4 = phi2 * phi2;
 return [
   lambda * (0.8707 - 0.131979 * phi2 + phi4 * (-0.013791 + phi4 * (0.003971 * phi2 - 0.001529 * phi4))),
   phi * (1.007226 + phi2 * (0.015085 + phi4 * (-0.044475 + 0.028874 * phi2 - 0.005916 * phi4)))
 ];

}

naturalEarth1Raw.invert = function(x, y) {

 var phi = y, i = 25, delta;
 do {
   var phi2 = phi * phi, phi4 = phi2 * phi2;
   phi -= delta = (phi * (1.007226 + phi2 * (0.015085 + phi4 * (-0.044475 + 0.028874 * phi2 - 0.005916 * phi4))) - y) /
       (1.007226 + phi2 * (0.015085 * 3 + phi4 * (-0.044475 * 7 + 0.028874 * 9 * phi2 - 0.005916 * 11 * phi4)));
 } while (abs(delta) > epsilon$2 && --i > 0);
 return [
   x / (0.8707 + (phi2 = phi * phi) * (-0.131979 + phi2 * (-0.013791 + phi2 * phi2 * phi2 * (0.003971 - 0.001529 * phi2)))),
   phi
 ];

};

var naturalEarth1 = function() {

 return projection(naturalEarth1Raw)
     .scale(175.295);

};

function orthographicRaw(x, y) {

 return [cos$1(y) * sin$1(x), sin$1(y)];

}

orthographicRaw.invert = azimuthalInvert(asin);

var orthographic = function() {

 return projection(orthographicRaw)
     .scale(249.5)
     .clipAngle(90 + epsilon$2);

};

function stereographicRaw(x, y) {

 var cy = cos$1(y), k = 1 + cos$1(x) * cy;
 return [cy * sin$1(x) / k, sin$1(y) / k];

}

stereographicRaw.invert = azimuthalInvert(function(z) {

 return 2 * atan(z);

});

var stereographic = function() {

 return projection(stereographicRaw)
     .scale(250)
     .clipAngle(142);

};

function transverseMercatorRaw(lambda, phi) {

 return [log(tan((halfPi$2 + phi) / 2)), -lambda];

}

transverseMercatorRaw.invert = function(x, y) {

 return [-y, 2 * atan(exp(x)) - halfPi$2];

};

var transverseMercator = function() {

 var m = mercatorProjection(transverseMercatorRaw),
     center = m.center,
     rotate = m.rotate;

 m.center = function(_) {
   return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]);
 };

 m.rotate = function(_) {
   return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]);
 };

 return rotate([0, 0, 90])
     .scale(159.155);

};

function defaultSeparation(a, b) {

 return a.parent === b.parent ? 1 : 2;

}

function meanX(children) {

 return children.reduce(meanXReduce, 0) / children.length;

}

function meanXReduce(x, c) {

 return x + c.x;

}

function maxY(children) {

 return 1 + children.reduce(maxYReduce, 0);

}

function maxYReduce(y, c) {

 return Math.max(y, c.y);

}

function leafLeft(node) {

 var children;
 while (children = node.children) node = children[0];
 return node;

}

function leafRight(node) {

 var children;
 while (children = node.children) node = children[children.length - 1];
 return node;

}

var cluster = function() {

 var separation = defaultSeparation,
     dx = 1,
     dy = 1,
     nodeSize = false;

 function cluster(root) {
   var previousNode,
       x = 0;

   // First walk, computing the initial x & y values.
   root.eachAfter(function(node) {
     var children = node.children;
     if (children) {
       node.x = meanX(children);
       node.y = maxY(children);
     } else {
       node.x = previousNode ? x += separation(node, previousNode) : 0;
       node.y = 0;
       previousNode = node;
     }
   });

   var left = leafLeft(root),
       right = leafRight(root),
       x0 = left.x - separation(left, right) / 2,
       x1 = right.x + separation(right, left) / 2;

   // Second walk, normalizing x & y to the desired size.
   return root.eachAfter(nodeSize ? function(node) {
     node.x = (node.x - root.x) * dx;
     node.y = (root.y - node.y) * dy;
   } : function(node) {
     node.x = (node.x - x0) / (x1 - x0) * dx;
     node.y = (1 - (root.y ? node.y / root.y : 1)) * dy;
   });
 }

 cluster.separation = function(x) {
   return arguments.length ? (separation = x, cluster) : separation;
 };

 cluster.size = function(x) {
   return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? null : [dx, dy]);
 };

 cluster.nodeSize = function(x) {
   return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? [dx, dy] : null);
 };

 return cluster;

};

function count(node) {

 var sum = 0,
     children = node.children,
     i = children && children.length;
 if (!i) sum = 1;
 else while (--i >= 0) sum += children[i].value;
 node.value = sum;

}

var node_count = function() {

 return this.eachAfter(count);

};

var node_each = function(callback) {

 var node = this, current, next = [node], children, i, n;
 do {
   current = next.reverse(), next = [];
   while (node = current.pop()) {
     callback(node), children = node.children;
     if (children) for (i = 0, n = children.length; i < n; ++i) {
       next.push(children[i]);
     }
   }
 } while (next.length);
 return this;

};

var node_eachBefore = function(callback) {

 var node = this, nodes = [node], children, i;
 while (node = nodes.pop()) {
   callback(node), children = node.children;
   if (children) for (i = children.length - 1; i >= 0; --i) {
     nodes.push(children[i]);
   }
 }
 return this;

};

var node_eachAfter = function(callback) {

 var node = this, nodes = [node], next = [], children, i, n;
 while (node = nodes.pop()) {
   next.push(node), children = node.children;
   if (children) for (i = 0, n = children.length; i < n; ++i) {
     nodes.push(children[i]);
   }
 }
 while (node = next.pop()) {
   callback(node);
 }
 return this;

};

var node_sum = function(value) {

 return this.eachAfter(function(node) {
   var sum = +value(node.data) || 0,
       children = node.children,
       i = children && children.length;
   while (--i >= 0) sum += children[i].value;
   node.value = sum;
 });

};

var node_sort = function(compare) {

 return this.eachBefore(function(node) {
   if (node.children) {
     node.children.sort(compare);
   }
 });

};

var node_path = function(end) {

 var start = this,
     ancestor = leastCommonAncestor(start, end),
     nodes = [start];
 while (start !== ancestor) {
   start = start.parent;
   nodes.push(start);
 }
 var k = nodes.length;
 while (end !== ancestor) {
   nodes.splice(k, 0, end);
   end = end.parent;
 }
 return nodes;

};

function leastCommonAncestor(a, b) {

 if (a === b) return a;
 var aNodes = a.ancestors(),
     bNodes = b.ancestors(),
     c = null;
 a = aNodes.pop();
 b = bNodes.pop();
 while (a === b) {
   c = a;
   a = aNodes.pop();
   b = bNodes.pop();
 }
 return c;

}

var node_ancestors = function() {

 var node = this, nodes = [node];
 while (node = node.parent) {
   nodes.push(node);
 }
 return nodes;

};

var node_descendants = function() {

 var nodes = [];
 this.each(function(node) {
   nodes.push(node);
 });
 return nodes;

};

var node_leaves = function() {

 var leaves = [];
 this.eachBefore(function(node) {
   if (!node.children) {
     leaves.push(node);
   }
 });
 return leaves;

};

var node_links = function() {

 var root = this, links = [];
 root.each(function(node) {
   if (node !== root) { // Don’t include the root’s parent, if any.
     links.push({source: node.parent, target: node});
   }
 });
 return links;

};

function hierarchy(data, children) {

 var root = new Node(data),
     valued = +data.value && (root.value = data.value),
     node,
     nodes = [root],
     child,
     childs,
     i,
     n;

 if (children == null) children = defaultChildren;

 while (node = nodes.pop()) {
   if (valued) node.value = +node.data.value;
   if ((childs = children(node.data)) && (n = childs.length)) {
     node.children = new Array(n);
     for (i = n - 1; i >= 0; --i) {
       nodes.push(child = node.children[i] = new Node(childs[i]));
       child.parent = node;
       child.depth = node.depth + 1;
     }
   }
 }

 return root.eachBefore(computeHeight);

}

function node_copy() {

 return hierarchy(this).eachBefore(copyData);

}

function defaultChildren(d) {

 return d.children;

}

function copyData(node) {

 node.data = node.data.data;

}

function computeHeight(node) {

 var height = 0;
 do node.height = height;
 while ((node = node.parent) && (node.height < ++height));

}

function Node(data) {

 this.data = data;
 this.depth =
 this.height = 0;
 this.parent = null;

}

Node.prototype = hierarchy.prototype = {

 constructor: Node,
 count: node_count,
 each: node_each,
 eachAfter: node_eachAfter,
 eachBefore: node_eachBefore,
 sum: node_sum,
 sort: node_sort,
 path: node_path,
 ancestors: node_ancestors,
 descendants: node_descendants,
 leaves: node_leaves,
 links: node_links,
 copy: node_copy

};

var slice$3 = Array.prototype.slice;

function shuffle$1(array) {

 var m = array.length,
     t,
     i;

 while (m) {
   i = Math.random() * m-- | 0;
   t = array[m];
   array[m] = array[i];
   array[i] = t;
 }

 return array;

}

var enclose = function(circles) {

 var i = 0, n = (circles = shuffle$1(slice$3.call(circles))).length, B = [], p, e;

 while (i < n) {
   p = circles[i];
   if (e && enclosesWeak(e, p)) ++i;
   else e = encloseBasis(B = extendBasis(B, p)), i = 0;
 }

 return e;

};

function extendBasis(B, p) {

 var i, j;

 if (enclosesWeakAll(p, B)) return [p];

 // If we get here then B must have at least one element.
 for (i = 0; i < B.length; ++i) {
   if (enclosesNot(p, B[i])
       && enclosesWeakAll(encloseBasis2(B[i], p), B)) {
     return [B[i], p];
   }
 }

 // If we get here then B must have at least two elements.
 for (i = 0; i < B.length - 1; ++i) {
   for (j = i + 1; j < B.length; ++j) {
     if (enclosesNot(encloseBasis2(B[i], B[j]), p)
         && enclosesNot(encloseBasis2(B[i], p), B[j])
         && enclosesNot(encloseBasis2(B[j], p), B[i])
         && enclosesWeakAll(encloseBasis3(B[i], B[j], p), B)) {
       return [B[i], B[j], p];
     }
   }
 }

 // If we get here then something is very wrong.
 throw new Error;

}

function enclosesNot(a, b) {

 var dr = a.r - b.r, dx = b.x - a.x, dy = b.y - a.y;
 return dr < 0 || dr * dr < dx * dx + dy * dy;

}

function enclosesWeak(a, b) {

 var dr = a.r - b.r + 1e-6, dx = b.x - a.x, dy = b.y - a.y;
 return dr > 0 && dr * dr > dx * dx + dy * dy;

}

function enclosesWeakAll(a, B) {

 for (var i = 0; i < B.length; ++i) {
   if (!enclosesWeak(a, B[i])) {
     return false;
   }
 }
 return true;

}

function encloseBasis(B) {

 switch (B.length) {
   case 1: return encloseBasis1(B[0]);
   case 2: return encloseBasis2(B[0], B[1]);
   case 3: return encloseBasis3(B[0], B[1], B[2]);
 }

}

function encloseBasis1(a) {

 return {
   x: a.x,
   y: a.y,
   r: a.r
 };

}

function encloseBasis2(a, b) {

 var x1 = a.x, y1 = a.y, r1 = a.r,
     x2 = b.x, y2 = b.y, r2 = b.r,
     x21 = x2 - x1, y21 = y2 - y1, r21 = r2 - r1,
     l = Math.sqrt(x21 * x21 + y21 * y21);
 return {
   x: (x1 + x2 + x21 / l * r21) / 2,
   y: (y1 + y2 + y21 / l * r21) / 2,
   r: (l + r1 + r2) / 2
 };

}

function encloseBasis3(a, b, c) {

 var x1 = a.x, y1 = a.y, r1 = a.r,
     x2 = b.x, y2 = b.y, r2 = b.r,
     x3 = c.x, y3 = c.y, r3 = c.r,
     a2 = x1 - x2,
     a3 = x1 - x3,
     b2 = y1 - y2,
     b3 = y1 - y3,
     c2 = r2 - r1,
     c3 = r3 - r1,
     d1 = x1 * x1 + y1 * y1 - r1 * r1,
     d2 = d1 - x2 * x2 - y2 * y2 + r2 * r2,
     d3 = d1 - x3 * x3 - y3 * y3 + r3 * r3,
     ab = a3 * b2 - a2 * b3,
     xa = (b2 * d3 - b3 * d2) / (ab * 2) - x1,
     xb = (b3 * c2 - b2 * c3) / ab,
     ya = (a3 * d2 - a2 * d3) / (ab * 2) - y1,
     yb = (a2 * c3 - a3 * c2) / ab,
     A = xb * xb + yb * yb - 1,
     B = 2 * (r1 + xa * xb + ya * yb),
     C = xa * xa + ya * ya - r1 * r1,
     r = -(A ? (B + Math.sqrt(B * B - 4 * A * C)) / (2 * A) : C / B);
 return {
   x: x1 + xa + xb * r,
   y: y1 + ya + yb * r,
   r: r
 };

}

function place(a, b, c) {

 var ax = a.x,
     ay = a.y,
     da = b.r + c.r,
     db = a.r + c.r,
     dx = b.x - ax,
     dy = b.y - ay,
     dc = dx * dx + dy * dy;
 if (dc) {
   var x = 0.5 + ((db *= db) - (da *= da)) / (2 * dc),
       y = Math.sqrt(Math.max(0, 2 * da * (db + dc) - (db -= dc) * db - da * da)) / (2 * dc);
   c.x = ax + x * dx + y * dy;
   c.y = ay + x * dy - y * dx;
 } else {
   c.x = ax + db;
   c.y = ay;
 }

}

function intersects(a, b) {

 var dx = b.x - a.x,
     dy = b.y - a.y,
     dr = a.r + b.r;
 return dr * dr - 1e-6 > dx * dx + dy * dy;

}

function score(node) {

 var a = node._,
     b = node.next._,
     ab = a.r + b.r,
     dx = (a.x * b.r + b.x * a.r) / ab,
     dy = (a.y * b.r + b.y * a.r) / ab;
 return dx * dx + dy * dy;

}

function Node$1(circle) {

 this._ = circle;
 this.next = null;
 this.previous = null;

}

function packEnclose(circles) {

 if (!(n = circles.length)) return 0;

 var a, b, c, n, aa, ca, i, j, k, sj, sk;

 // Place the first circle.
 a = circles[0], a.x = 0, a.y = 0;
 if (!(n > 1)) return a.r;

 // Place the second circle.
 b = circles[1], a.x = -b.r, b.x = a.r, b.y = 0;
 if (!(n > 2)) return a.r + b.r;

 // Place the third circle.
 place(b, a, c = circles[2]);

 // Initialize the front-chain using the first three circles a, b and c.
 a = new Node$1(a), b = new Node$1(b), c = new Node$1(c);
 a.next = c.previous = b;
 b.next = a.previous = c;
 c.next = b.previous = a;

 // Attempt to place each remaining circle…
 pack: for (i = 3; i < n; ++i) {
   place(a._, b._, c = circles[i]), c = new Node$1(c);

   // Find the closest intersecting circle on the front-chain, if any.
   // “Closeness” is determined by linear distance along the front-chain.
   // “Ahead” or “behind” is likewise determined by linear distance.
   j = b.next, k = a.previous, sj = b._.r, sk = a._.r;
   do {
     if (sj <= sk) {
       if (intersects(j._, c._)) {
         b = j, a.next = b, b.previous = a, --i;
         continue pack;
       }
       sj += j._.r, j = j.next;
     } else {
       if (intersects(k._, c._)) {
         a = k, a.next = b, b.previous = a, --i;
         continue pack;
       }
       sk += k._.r, k = k.previous;
     }
   } while (j !== k.next);

   // Success! Insert the new circle c between a and b.
   c.previous = a, c.next = b, a.next = b.previous = b = c;

   // Compute the new closest circle pair to the centroid.
   aa = score(a);
   while ((c = c.next) !== b) {
     if ((ca = score(c)) < aa) {
       a = c, aa = ca;
     }
   }
   b = a.next;
 }

 // Compute the enclosing circle of the front chain.
 a = [b._], c = b; while ((c = c.next) !== b) a.push(c._); c = enclose(a);

 // Translate the circles to put the enclosing circle around the origin.
 for (i = 0; i < n; ++i) a = circles[i], a.x -= c.x, a.y -= c.y;

 return c.r;

}

var siblings = function(circles) {

 packEnclose(circles);
 return circles;

};

function optional(f) {

 return f == null ? null : required(f);

}

function required(f) {

 if (typeof f !== "function") throw new Error;
 return f;

}

function constantZero() {

 return 0;

}

var constant$8 = function(x) {

 return function() {
   return x;
 };

};

function defaultRadius$1(d) {

 return Math.sqrt(d.value);

}

var index$2 = function() {

 var radius = null,
     dx = 1,
     dy = 1,
     padding = constantZero;

 function pack(root) {
   root.x = dx / 2, root.y = dy / 2;
   if (radius) {
     root.eachBefore(radiusLeaf(radius))
         .eachAfter(packChildren(padding, 0.5))
         .eachBefore(translateChild(1));
   } else {
     root.eachBefore(radiusLeaf(defaultRadius$1))
         .eachAfter(packChildren(constantZero, 1))
         .eachAfter(packChildren(padding, root.r / Math.min(dx, dy)))
         .eachBefore(translateChild(Math.min(dx, dy) / (2 * root.r)));
   }
   return root;
 }

 pack.radius = function(x) {
   return arguments.length ? (radius = optional(x), pack) : radius;
 };

 pack.size = function(x) {
   return arguments.length ? (dx = +x[0], dy = +x[1], pack) : [dx, dy];
 };

 pack.padding = function(x) {
   return arguments.length ? (padding = typeof x === "function" ? x : constant$8(+x), pack) : padding;
 };

 return pack;

};

function radiusLeaf(radius) {

 return function(node) {
   if (!node.children) {
     node.r = Math.max(0, +radius(node) || 0);
   }
 };

}

function packChildren(padding, k) {

 return function(node) {
   if (children = node.children) {
     var children,
         i,
         n = children.length,
         r = padding(node) * k || 0,
         e;

     if (r) for (i = 0; i < n; ++i) children[i].r += r;
     e = packEnclose(children);
     if (r) for (i = 0; i < n; ++i) children[i].r -= r;
     node.r = e + r;
   }
 };

}

function translateChild(k) {

 return function(node) {
   var parent = node.parent;
   node.r *= k;
   if (parent) {
     node.x = parent.x + k * node.x;
     node.y = parent.y + k * node.y;
   }
 };

}

var roundNode = function(node) {

 node.x0 = Math.round(node.x0);
 node.y0 = Math.round(node.y0);
 node.x1 = Math.round(node.x1);
 node.y1 = Math.round(node.y1);

};

var treemapDice = function(parent, x0, y0, x1, y1) {

 var nodes = parent.children,
     node,
     i = -1,
     n = nodes.length,
     k = parent.value && (x1 - x0) / parent.value;

 while (++i < n) {
   node = nodes[i], node.y0 = y0, node.y1 = y1;
   node.x0 = x0, node.x1 = x0 += node.value * k;
 }

};

var partition = function() {

 var dx = 1,
     dy = 1,
     padding = 0,
     round = false;

 function partition(root) {
   var n = root.height + 1;
   root.x0 =
   root.y0 = padding;
   root.x1 = dx;
   root.y1 = dy / n;
   root.eachBefore(positionNode(dy, n));
   if (round) root.eachBefore(roundNode);
   return root;
 }

 function positionNode(dy, n) {
   return function(node) {
     if (node.children) {
       treemapDice(node, node.x0, dy * (node.depth + 1) / n, node.x1, dy * (node.depth + 2) / n);
     }
     var x0 = node.x0,
         y0 = node.y0,
         x1 = node.x1 - padding,
         y1 = node.y1 - padding;
     if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
     if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
     node.x0 = x0;
     node.y0 = y0;
     node.x1 = x1;
     node.y1 = y1;
   };
 }

 partition.round = function(x) {
   return arguments.length ? (round = !!x, partition) : round;
 };

 partition.size = function(x) {
   return arguments.length ? (dx = +x[0], dy = +x[1], partition) : [dx, dy];
 };

 partition.padding = function(x) {
   return arguments.length ? (padding = +x, partition) : padding;
 };

 return partition;

};

var keyPrefix$1 = "$"; var preroot = {depth: -1}; var ambiguous = {};

function defaultId(d) {

 return d.id;

}

function defaultParentId(d) {

 return d.parentId;

}

var stratify = function() {

 var id = defaultId,
     parentId = defaultParentId;

 function stratify(data) {
   var d,
       i,
       n = data.length,
       root,
       parent,
       node,
       nodes = new Array(n),
       nodeId,
       nodeKey,
       nodeByKey = {};

   for (i = 0; i < n; ++i) {
     d = data[i], node = nodes[i] = new Node(d);
     if ((nodeId = id(d, i, data)) != null && (nodeId += "")) {
       nodeKey = keyPrefix$1 + (node.id = nodeId);
       nodeByKey[nodeKey] = nodeKey in nodeByKey ? ambiguous : node;
     }
   }

   for (i = 0; i < n; ++i) {
     node = nodes[i], nodeId = parentId(data[i], i, data);
     if (nodeId == null || !(nodeId += "")) {
       if (root) throw new Error("multiple roots");
       root = node;
     } else {
       parent = nodeByKey[keyPrefix$1 + nodeId];
       if (!parent) throw new Error("missing: " + nodeId);
       if (parent === ambiguous) throw new Error("ambiguous: " + nodeId);
       if (parent.children) parent.children.push(node);
       else parent.children = [node];
       node.parent = parent;
     }
   }

   if (!root) throw new Error("no root");
   root.parent = preroot;
   root.eachBefore(function(node) { node.depth = node.parent.depth + 1; --n; }).eachBefore(computeHeight);
   root.parent = null;
   if (n > 0) throw new Error("cycle");

   return root;
 }

 stratify.id = function(x) {
   return arguments.length ? (id = required(x), stratify) : id;
 };

 stratify.parentId = function(x) {
   return arguments.length ? (parentId = required(x), stratify) : parentId;
 };

 return stratify;

};

function defaultSeparation$1(a, b) {

 return a.parent === b.parent ? 1 : 2;

}

// function radialSeparation(a, b) { // return (a.parent === b.parent ? 1 : 2) / a.depth; // }

// This function is used to traverse the left contour of a subtree (or // subforest). It returns the successor of v on this contour. This successor is // either given by the leftmost child of v or by the thread of v. The function // returns null if and only if v is on the highest level of its subtree. function nextLeft(v) {

 var children = v.children;
 return children ? children[0] : v.t;

}

// This function works analogously to nextLeft. function nextRight(v) {

 var children = v.children;
 return children ? children[children.length - 1] : v.t;

}

// Shifts the current subtree rooted at w+. This is done by increasing // prelim(w+) and mod(w+) by shift. function moveSubtree(wm, wp, shift) {

 var change = shift / (wp.i - wm.i);
 wp.c -= change;
 wp.s += shift;
 wm.c += change;
 wp.z += shift;
 wp.m += shift;

}

// All other shifts, applied to the smaller subtrees between w- and w+, are // performed by this function. To prepare the shifts, we have to adjust // change(w+), shift(w+), and change(w-). function executeShifts(v) {

 var shift = 0,
     change = 0,
     children = v.children,
     i = children.length,
     w;
 while (--i >= 0) {
   w = children[i];
   w.z += shift;
   w.m += shift;
   shift += w.s + (change += w.c);
 }

}

// If vi-’s ancestor is a sibling of v, returns vi-’s ancestor. Otherwise, // returns the specified (default) ancestor. function nextAncestor(vim, v, ancestor) {

 return vim.a.parent === v.parent ? vim.a : ancestor;

}

function TreeNode(node, i) {

 this._ = node;
 this.parent = null;
 this.children = null;
 this.A = null; // default ancestor
 this.a = this; // ancestor
 this.z = 0; // prelim
 this.m = 0; // mod
 this.c = 0; // change
 this.s = 0; // shift
 this.t = null; // thread
 this.i = i; // number

}

TreeNode.prototype = Object.create(Node.prototype);

function treeRoot(root) {

 var tree = new TreeNode(root, 0),
     node,
     nodes = [tree],
     child,
     children,
     i,
     n;

 while (node = nodes.pop()) {
   if (children = node._.children) {
     node.children = new Array(n = children.length);
     for (i = n - 1; i >= 0; --i) {
       nodes.push(child = node.children[i] = new TreeNode(children[i], i));
       child.parent = node;
     }
   }
 }

 (tree.parent = new TreeNode(null, 0)).children = [tree];
 return tree;

}

// Node-link tree diagram using the Reingold-Tilford "tidy" algorithm var tree = function() {

 var separation = defaultSeparation$1,
     dx = 1,
     dy = 1,
     nodeSize = null;

 function tree(root) {
   var t = treeRoot(root);

   // Compute the layout using Buchheim et al.’s algorithm.
   t.eachAfter(firstWalk), t.parent.m = -t.z;
   t.eachBefore(secondWalk);

   // If a fixed node size is specified, scale x and y.
   if (nodeSize) root.eachBefore(sizeNode);

   // If a fixed tree size is specified, scale x and y based on the extent.
   // Compute the left-most, right-most, and depth-most nodes for extents.
   else {
     var left = root,
         right = root,
         bottom = root;
     root.eachBefore(function(node) {
       if (node.x < left.x) left = node;
       if (node.x > right.x) right = node;
       if (node.depth > bottom.depth) bottom = node;
     });
     var s = left === right ? 1 : separation(left, right) / 2,
         tx = s - left.x,
         kx = dx / (right.x + s + tx),
         ky = dy / (bottom.depth || 1);
     root.eachBefore(function(node) {
       node.x = (node.x + tx) * kx;
       node.y = node.depth * ky;
     });
   }

   return root;
 }

 // Computes a preliminary x-coordinate for v. Before that, FIRST WALK is
 // applied recursively to the children of v, as well as the function
 // APPORTION. After spacing out the children by calling EXECUTE SHIFTS, the
 // node v is placed to the midpoint of its outermost children.
 function firstWalk(v) {
   var children = v.children,
       siblings = v.parent.children,
       w = v.i ? siblings[v.i - 1] : null;
   if (children) {
     executeShifts(v);
     var midpoint = (children[0].z + children[children.length - 1].z) / 2;
     if (w) {
       v.z = w.z + separation(v._, w._);
       v.m = v.z - midpoint;
     } else {
       v.z = midpoint;
     }
   } else if (w) {
     v.z = w.z + separation(v._, w._);
   }
   v.parent.A = apportion(v, w, v.parent.A || siblings[0]);
 }

 // Computes all real x-coordinates by summing up the modifiers recursively.
 function secondWalk(v) {
   v._.x = v.z + v.parent.m;
   v.m += v.parent.m;
 }

 // The core of the algorithm. Here, a new subtree is combined with the
 // previous subtrees. Threads are used to traverse the inside and outside
 // contours of the left and right subtree up to the highest common level. The
 // vertices used for the traversals are vi+, vi-, vo-, and vo+, where the
 // superscript o means outside and i means inside, the subscript - means left
 // subtree and + means right subtree. For summing up the modifiers along the
 // contour, we use respective variables si+, si-, so-, and so+. Whenever two
 // nodes of the inside contours conflict, we compute the left one of the
 // greatest uncommon ancestors using the function ANCESTOR and call MOVE
 // SUBTREE to shift the subtree and prepare the shifts of smaller subtrees.
 // Finally, we add a new thread (if necessary).
 function apportion(v, w, ancestor) {
   if (w) {
     var vip = v,
         vop = v,
         vim = w,
         vom = vip.parent.children[0],
         sip = vip.m,
         sop = vop.m,
         sim = vim.m,
         som = vom.m,
         shift;
     while (vim = nextRight(vim), vip = nextLeft(vip), vim && vip) {
       vom = nextLeft(vom);
       vop = nextRight(vop);
       vop.a = v;
       shift = vim.z + sim - vip.z - sip + separation(vim._, vip._);
       if (shift > 0) {
         moveSubtree(nextAncestor(vim, v, ancestor), v, shift);
         sip += shift;
         sop += shift;
       }
       sim += vim.m;
       sip += vip.m;
       som += vom.m;
       sop += vop.m;
     }
     if (vim && !nextRight(vop)) {
       vop.t = vim;
       vop.m += sim - sop;
     }
     if (vip && !nextLeft(vom)) {
       vom.t = vip;
       vom.m += sip - som;
       ancestor = v;
     }
   }
   return ancestor;
 }

 function sizeNode(node) {
   node.x *= dx;
   node.y = node.depth * dy;
 }

 tree.separation = function(x) {
   return arguments.length ? (separation = x, tree) : separation;
 };

 tree.size = function(x) {
   return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], tree) : (nodeSize ? null : [dx, dy]);
 };

 tree.nodeSize = function(x) {
   return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], tree) : (nodeSize ? [dx, dy] : null);
 };

 return tree;

};

var treemapSlice = function(parent, x0, y0, x1, y1) {

 var nodes = parent.children,
     node,
     i = -1,
     n = nodes.length,
     k = parent.value && (y1 - y0) / parent.value;

 while (++i < n) {
   node = nodes[i], node.x0 = x0, node.x1 = x1;
   node.y0 = y0, node.y1 = y0 += node.value * k;
 }

};

var phi = (1 + Math.sqrt(5)) / 2;

function squarifyRatio(ratio, parent, x0, y0, x1, y1) {

 var rows = [],
     nodes = parent.children,
     row,
     nodeValue,
     i0 = 0,
     i1 = 0,
     n = nodes.length,
     dx, dy,
     value = parent.value,
     sumValue,
     minValue,
     maxValue,
     newRatio,
     minRatio,
     alpha,
     beta;

 while (i0 < n) {
   dx = x1 - x0, dy = y1 - y0;

   // Find the next non-empty node.
   do sumValue = nodes[i1++].value; while (!sumValue && i1 < n);
   minValue = maxValue = sumValue;
   alpha = Math.max(dy / dx, dx / dy) / (value * ratio);
   beta = sumValue * sumValue * alpha;
   minRatio = Math.max(maxValue / beta, beta / minValue);

   // Keep adding nodes while the aspect ratio maintains or improves.
   for (; i1 < n; ++i1) {
     sumValue += nodeValue = nodes[i1].value;
     if (nodeValue < minValue) minValue = nodeValue;
     if (nodeValue > maxValue) maxValue = nodeValue;
     beta = sumValue * sumValue * alpha;
     newRatio = Math.max(maxValue / beta, beta / minValue);
     if (newRatio > minRatio) { sumValue -= nodeValue; break; }
     minRatio = newRatio;
   }

   // Position and record the row orientation.
   rows.push(row = {value: sumValue, dice: dx < dy, children: nodes.slice(i0, i1)});
   if (row.dice) treemapDice(row, x0, y0, x1, value ? y0 += dy * sumValue / value : y1);
   else treemapSlice(row, x0, y0, value ? x0 += dx * sumValue / value : x1, y1);
   value -= sumValue, i0 = i1;
 }

 return rows;

}

var squarify = (function custom(ratio) {

 function squarify(parent, x0, y0, x1, y1) {
   squarifyRatio(ratio, parent, x0, y0, x1, y1);
 }

 squarify.ratio = function(x) {
   return custom((x = +x) > 1 ? x : 1);
 };

 return squarify;

})(phi);

var index$3 = function() {

 var tile = squarify,
     round = false,
     dx = 1,
     dy = 1,
     paddingStack = [0],
     paddingInner = constantZero,
     paddingTop = constantZero,
     paddingRight = constantZero,
     paddingBottom = constantZero,
     paddingLeft = constantZero;

 function treemap(root) {
   root.x0 =
   root.y0 = 0;
   root.x1 = dx;
   root.y1 = dy;
   root.eachBefore(positionNode);
   paddingStack = [0];
   if (round) root.eachBefore(roundNode);
   return root;
 }

 function positionNode(node) {
   var p = paddingStack[node.depth],
       x0 = node.x0 + p,
       y0 = node.y0 + p,
       x1 = node.x1 - p,
       y1 = node.y1 - p;
   if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
   if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
   node.x0 = x0;
   node.y0 = y0;
   node.x1 = x1;
   node.y1 = y1;
   if (node.children) {
     p = paddingStack[node.depth + 1] = paddingInner(node) / 2;
     x0 += paddingLeft(node) - p;
     y0 += paddingTop(node) - p;
     x1 -= paddingRight(node) - p;
     y1 -= paddingBottom(node) - p;
     if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
     if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
     tile(node, x0, y0, x1, y1);
   }
 }

 treemap.round = function(x) {
   return arguments.length ? (round = !!x, treemap) : round;
 };

 treemap.size = function(x) {
   return arguments.length ? (dx = +x[0], dy = +x[1], treemap) : [dx, dy];
 };

 treemap.tile = function(x) {
   return arguments.length ? (tile = required(x), treemap) : tile;
 };

 treemap.padding = function(x) {
   return arguments.length ? treemap.paddingInner(x).paddingOuter(x) : treemap.paddingInner();
 };

 treemap.paddingInner = function(x) {
   return arguments.length ? (paddingInner = typeof x === "function" ? x : constant$8(+x), treemap) : paddingInner;
 };

 treemap.paddingOuter = function(x) {
   return arguments.length ? treemap.paddingTop(x).paddingRight(x).paddingBottom(x).paddingLeft(x) : treemap.paddingTop();
 };

 treemap.paddingTop = function(x) {
   return arguments.length ? (paddingTop = typeof x === "function" ? x : constant$8(+x), treemap) : paddingTop;
 };

 treemap.paddingRight = function(x) {
   return arguments.length ? (paddingRight = typeof x === "function" ? x : constant$8(+x), treemap) : paddingRight;
 };

 treemap.paddingBottom = function(x) {
   return arguments.length ? (paddingBottom = typeof x === "function" ? x : constant$8(+x), treemap) : paddingBottom;
 };

 treemap.paddingLeft = function(x) {
   return arguments.length ? (paddingLeft = typeof x === "function" ? x : constant$8(+x), treemap) : paddingLeft;
 };

 return treemap;

};

var binary = function(parent, x0, y0, x1, y1) {

 var nodes = parent.children,
     i, n = nodes.length,
     sum, sums = new Array(n + 1);

 for (sums[0] = sum = i = 0; i < n; ++i) {
   sums[i + 1] = sum += nodes[i].value;
 }

 partition(0, n, parent.value, x0, y0, x1, y1);

 function partition(i, j, value, x0, y0, x1, y1) {
   if (i >= j - 1) {
     var node = nodes[i];
     node.x0 = x0, node.y0 = y0;
     node.x1 = x1, node.y1 = y1;
     return;
   }

   var valueOffset = sums[i],
       valueTarget = (value / 2) + valueOffset,
       k = i + 1,
       hi = j - 1;

   while (k < hi) {
     var mid = k + hi >>> 1;
     if (sums[mid] < valueTarget) k = mid + 1;
     else hi = mid;
   }

   if ((valueTarget - sums[k - 1]) < (sums[k] - valueTarget) && i + 1 < k) --k;

   var valueLeft = sums[k] - valueOffset,
       valueRight = value - valueLeft;

   if ((x1 - x0) > (y1 - y0)) {
     var xk = (x0 * valueRight + x1 * valueLeft) / value;
     partition(i, k, valueLeft, x0, y0, xk, y1);
     partition(k, j, valueRight, xk, y0, x1, y1);
   } else {
     var yk = (y0 * valueRight + y1 * valueLeft) / value;
     partition(i, k, valueLeft, x0, y0, x1, yk);
     partition(k, j, valueRight, x0, yk, x1, y1);
   }
 }

};

var sliceDice = function(parent, x0, y0, x1, y1) {

 (parent.depth & 1 ? treemapSlice : treemapDice)(parent, x0, y0, x1, y1);

};

var resquarify = (function custom(ratio) {

 function resquarify(parent, x0, y0, x1, y1) {
   if ((rows = parent._squarify) && (rows.ratio === ratio)) {
     var rows,
         row,
         nodes,
         i,
         j = -1,
         n,
         m = rows.length,
         value = parent.value;

     while (++j < m) {
       row = rows[j], nodes = row.children;
       for (i = row.value = 0, n = nodes.length; i < n; ++i) row.value += nodes[i].value;
       if (row.dice) treemapDice(row, x0, y0, x1, y0 += (y1 - y0) * row.value / value);
       else treemapSlice(row, x0, y0, x0 += (x1 - x0) * row.value / value, y1);
       value -= row.value;
     }
   } else {
     parent._squarify = rows = squarifyRatio(ratio, parent, x0, y0, x1, y1);
     rows.ratio = ratio;
   }
 }

 resquarify.ratio = function(x) {
   return custom((x = +x) > 1 ? x : 1);
 };

 return resquarify;

})(phi);

var area$1 = function(polygon) {

 var i = -1,
     n = polygon.length,
     a,
     b = polygon[n - 1],
     area = 0;

 while (++i < n) {
   a = b;
   b = polygon[i];
   area += a[1] * b[0] - a[0] * b[1];
 }

 return area / 2;

};

var centroid$1 = function(polygon) {

 var i = -1,
     n = polygon.length,
     x = 0,
     y = 0,
     a,
     b = polygon[n - 1],
     c,
     k = 0;

 while (++i < n) {
   a = b;
   b = polygon[i];
   k += c = a[0] * b[1] - b[0] * a[1];
   x += (a[0] + b[0]) * c;
   y += (a[1] + b[1]) * c;
 }

 return k *= 3, [x / k, y / k];

};

// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of // the 3D cross product in a quadrant I Cartesian coordinate system (+x is // right, +y is up). Returns a positive value if ABC is counter-clockwise, // negative if clockwise, and zero if the points are collinear. var cross$1 = function(a, b, c) {

 return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);

};

function lexicographicOrder(a, b) {

 return a[0] - b[0] || a[1] - b[1];

}

// Computes the upper convex hull per the monotone chain algorithm. // Assumes points.length >= 3, is sorted by x, unique in y. // Returns an array of indices into points in left-to-right order. function computeUpperHullIndexes(points) {

 var n = points.length,
     indexes = [0, 1],
     size = 2;

 for (var i = 2; i < n; ++i) {
   while (size > 1 && cross$1(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) --size;
   indexes[size++] = i;
 }

 return indexes.slice(0, size); // remove popped points

}

var hull = function(points) {

 if ((n = points.length) < 3) return null;

 var i,
     n,
     sortedPoints = new Array(n),
     flippedPoints = new Array(n);

 for (i = 0; i < n; ++i) sortedPoints[i] = [+points[i][0], +points[i][1], i];
 sortedPoints.sort(lexicographicOrder);
 for (i = 0; i < n; ++i) flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];

 var upperIndexes = computeUpperHullIndexes(sortedPoints),
     lowerIndexes = computeUpperHullIndexes(flippedPoints);

 // Construct the hull polygon, removing possible duplicate endpoints.
 var skipLeft = lowerIndexes[0] === upperIndexes[0],
     skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
     hull = [];

 // Add upper hull in right-to-l order.
 // Then add lower hull in left-to-right order.
 for (i = upperIndexes.length - 1; i >= 0; --i) hull.push(points[sortedPoints[upperIndexes[i]][2]]);
 for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) hull.push(points[sortedPoints[lowerIndexes[i]][2]]);

 return hull;

};

var contains$1 = function(polygon, point) {

 var n = polygon.length,
     p = polygon[n - 1],
     x = point[0], y = point[1],
     x0 = p[0], y0 = p[1],
     x1, y1,
     inside = false;

 for (var i = 0; i < n; ++i) {
   p = polygon[i], x1 = p[0], y1 = p[1];
   if (((y1 > y) !== (y0 > y)) && (x < (x0 - x1) * (y - y1) / (y0 - y1) + x1)) inside = !inside;
   x0 = x1, y0 = y1;
 }

 return inside;

};

var length$2 = function(polygon) {

 var i = -1,
     n = polygon.length,
     b = polygon[n - 1],
     xa,
     ya,
     xb = b[0],
     yb = b[1],
     perimeter = 0;

 while (++i < n) {
   xa = xb;
   ya = yb;
   b = polygon[i];
   xb = b[0];
   yb = b[1];
   xa -= xb;
   ya -= yb;
   perimeter += Math.sqrt(xa * xa + ya * ya);
 }

 return perimeter;

};

var slice$4 = [].slice;

var noabort = {};

function Queue(size) {

 this._size = size;
 this._call =
 this._error = null;
 this._tasks = [];
 this._data = [];
 this._waiting =
 this._active =
 this._ended =
 this._start = 0; // inside a synchronous task callback?

}

Queue.prototype = queue.prototype = {

 constructor: Queue,
 defer: function(callback) {
   if (typeof callback !== "function") throw new Error("invalid callback");
   if (this._call) throw new Error("defer after await");
   if (this._error != null) return this;
   var t = slice$4.call(arguments, 1);
   t.push(callback);
   ++this._waiting, this._tasks.push(t);
   poke$1(this);
   return this;
 },
 abort: function() {
   if (this._error == null) abort(this, new Error("abort"));
   return this;
 },
 await: function(callback) {
   if (typeof callback !== "function") throw new Error("invalid callback");
   if (this._call) throw new Error("multiple await");
   this._call = function(error, results) { callback.apply(null, [error].concat(results)); };
   maybeNotify(this);
   return this;
 },
 awaitAll: function(callback) {
   if (typeof callback !== "function") throw new Error("invalid callback");
   if (this._call) throw new Error("multiple await");
   this._call = callback;
   maybeNotify(this);
   return this;
 }

};

function poke$1(q) {

 if (!q._start) {
   try { start$1(q); } // let the current task complete
   catch (e) {
     if (q._tasks[q._ended + q._active - 1]) abort(q, e); // task errored synchronously
     else if (!q._data) throw e; // await callback errored synchronously
   }
 }

}

function start$1(q) {

 while (q._start = q._waiting && q._active < q._size) {
   var i = q._ended + q._active,
       t = q._tasks[i],
       j = t.length - 1,
       c = t[j];
   t[j] = end(q, i);
   --q._waiting, ++q._active;
   t = c.apply(null, t);
   if (!q._tasks[i]) continue; // task finished synchronously
   q._tasks[i] = t || noabort;
 }

}

function end(q, i) {

 return function(e, r) {
   if (!q._tasks[i]) return; // ignore multiple callbacks
   --q._active, ++q._ended;
   q._tasks[i] = null;
   if (q._error != null) return; // ignore secondary errors
   if (e != null) {
     abort(q, e);
   } else {
     q._data[i] = r;
     if (q._waiting) poke$1(q);
     else maybeNotify(q);
   }
 };

}

function abort(q, e) {

 var i = q._tasks.length, t;
 q._error = e; // ignore active callbacks
 q._data = undefined; // allow gc
 q._waiting = NaN; // prevent starting

 while (--i >= 0) {
   if (t = q._tasks[i]) {
     q._tasks[i] = null;
     if (t.abort) {
       try { t.abort(); }
       catch (e) { /* ignore */ }
     }
   }
 }

 q._active = NaN; // allow notification
 maybeNotify(q);

}

function maybeNotify(q) {

 if (!q._active && q._call) {
   var d = q._data;
   q._data = undefined; // allow gc
   q._call(q._error, d);
 }

}

function queue(concurrency) {

 if (concurrency == null) concurrency = Infinity;
 else if (!((concurrency = +concurrency) >= 1)) throw new Error("invalid concurrency");
 return new Queue(concurrency);

}

var defaultSource$1 = function() {

 return Math.random();

};

var uniform = (function sourceRandomUniform(source) {

 function randomUniform(min, max) {
   min = min == null ? 0 : +min;
   max = max == null ? 1 : +max;
   if (arguments.length === 1) max = min, min = 0;
   else max -= min;
   return function() {
     return source() * max + min;
   };
 }

 randomUniform.source = sourceRandomUniform;

 return randomUniform;

})(defaultSource$1);

var normal = (function sourceRandomNormal(source) {

 function randomNormal(mu, sigma) {
   var x, r;
   mu = mu == null ? 0 : +mu;
   sigma = sigma == null ? 1 : +sigma;
   return function() {
     var y;

     // If available, use the second previously-generated uniform random.
     if (x != null) y = x, x = null;

     // Otherwise, generate a new x and y.
     else do {
       x = source() * 2 - 1;
       y = source() * 2 - 1;
       r = x * x + y * y;
     } while (!r || r > 1);

     return mu + sigma * y * Math.sqrt(-2 * Math.log(r) / r);
   };
 }

 randomNormal.source = sourceRandomNormal;

 return randomNormal;

})(defaultSource$1);

var logNormal = (function sourceRandomLogNormal(source) {

 function randomLogNormal() {
   var randomNormal = normal.source(source).apply(this, arguments);
   return function() {
     return Math.exp(randomNormal());
   };
 }

 randomLogNormal.source = sourceRandomLogNormal;

 return randomLogNormal;

})(defaultSource$1);

var irwinHall = (function sourceRandomIrwinHall(source) {

 function randomIrwinHall(n) {
   return function() {
     for (var sum = 0, i = 0; i < n; ++i) sum += source();
     return sum;
   };
 }

 randomIrwinHall.source = sourceRandomIrwinHall;

 return randomIrwinHall;

})(defaultSource$1);

var bates = (function sourceRandomBates(source) {

 function randomBates(n) {
   var randomIrwinHall = irwinHall.source(source)(n);
   return function() {
     return randomIrwinHall() / n;
   };
 }

 randomBates.source = sourceRandomBates;

 return randomBates;

})(defaultSource$1);

var exponential$1 = (function sourceRandomExponential(source) {

 function randomExponential(lambda) {
   return function() {
     return -Math.log(1 - source()) / lambda;
   };
 }

 randomExponential.source = sourceRandomExponential;

 return randomExponential;

})(defaultSource$1);

var request = function(url, callback) {

 var request,
     event = dispatch("beforesend", "progress", "load", "error"),
     mimeType,
     headers = map$1(),
     xhr = new XMLHttpRequest,
     user = null,
     password = null,
     response,
     responseType,
     timeout = 0;

 // If IE does not support CORS, use XDomainRequest.
 if (typeof XDomainRequest !== "undefined"
     && !("withCredentials" in xhr)
     && /^(http(s)?:)?\/\//.test(url)) xhr = new XDomainRequest;

 "onload" in xhr
     ? xhr.onload = xhr.onerror = xhr.ontimeout = respond
     : xhr.onreadystatechange = function(o) { xhr.readyState > 3 && respond(o); };

 function respond(o) {
   var status = xhr.status, result;
   if (!status && hasResponse(xhr)
       || status >= 200 && status < 300
       || status === 304) {
     if (response) {
       try {
         result = response.call(request, xhr);
       } catch (e) {
         event.call("error", request, e);
         return;
       }
     } else {
       result = xhr;
     }
     event.call("load", request, result);
   } else {
     event.call("error", request, o);
   }
 }

 xhr.onprogress = function(e) {
   event.call("progress", request, e);
 };

 request = {
   header: function(name, value) {
     name = (name + "").toLowerCase();
     if (arguments.length < 2) return headers.get(name);
     if (value == null) headers.remove(name);
     else headers.set(name, value + "");
     return request;
   },

   // If mimeType is non-null and no Accept header is set, a default is used.
   mimeType: function(value) {
     if (!arguments.length) return mimeType;
     mimeType = value == null ? null : value + "";
     return request;
   },

   // Specifies what type the response value should take;
   // for instance, arraybuffer, blob, document, or text.
   responseType: function(value) {
     if (!arguments.length) return responseType;
     responseType = value;
     return request;
   },

   timeout: function(value) {
     if (!arguments.length) return timeout;
     timeout = +value;
     return request;
   },

   user: function(value) {
     return arguments.length < 1 ? user : (user = value == null ? null : value + "", request);
   },

   password: function(value) {
     return arguments.length < 1 ? password : (password = value == null ? null : value + "", request);
   },

   // Specify how to convert the response content to a specific type;
   // changes the callback value on "load" events.
   response: function(value) {
     response = value;
     return request;
   },

   // Alias for send("GET", …).
   get: function(data, callback) {
     return request.send("GET", data, callback);
   },

   // Alias for send("POST", …).
   post: function(data, callback) {
     return request.send("POST", data, callback);
   },

   // If callback is non-null, it will be used for error and load events.
   send: function(method, data, callback) {
     xhr.open(method, url, true, user, password);
     if (mimeType != null && !headers.has("accept")) headers.set("accept", mimeType + ",*/*");
     if (xhr.setRequestHeader) headers.each(function(value, name) { xhr.setRequestHeader(name, value); });
     if (mimeType != null && xhr.overrideMimeType) xhr.overrideMimeType(mimeType);
     if (responseType != null) xhr.responseType = responseType;
     if (timeout > 0) xhr.timeout = timeout;
     if (callback == null && typeof data === "function") callback = data, data = null;
     if (callback != null && callback.length === 1) callback = fixCallback(callback);
     if (callback != null) request.on("error", callback).on("load", function(xhr) { callback(null, xhr); });
     event.call("beforesend", request, xhr);
     xhr.send(data == null ? null : data);
     return request;
   },

   abort: function() {
     xhr.abort();
     return request;
   },

   on: function() {
     var value = event.on.apply(event, arguments);
     return value === event ? request : value;
   }
 };

 if (callback != null) {
   if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
   return request.get(callback);
 }

 return request;

};

function fixCallback(callback) {

 return function(error, xhr) {
   callback(error == null ? xhr : null);
 };

}

function hasResponse(xhr) {

 var type = xhr.responseType;
 return type && type !== "text"
     ? xhr.response // null on error
     : xhr.responseText; // "" on error

}

var type$1 = function(defaultMimeType, response) {

 return function(url, callback) {
   var r = request(url).mimeType(defaultMimeType).response(response);
   if (callback != null) {
     if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
     return r.get(callback);
   }
   return r;
 };

};

var html = type$1("text/html", function(xhr) {

 return document.createRange().createContextualFragment(xhr.responseText);

});

var json = type$1("application/json", function(xhr) {

 return JSON.parse(xhr.responseText);

});

var text = type$1("text/plain", function(xhr) {

 return xhr.responseText;

});

var xml = type$1("application/xml", function(xhr) {

 var xml = xhr.responseXML;
 if (!xml) throw new Error("parse error");
 return xml;

});

var dsv$1 = function(defaultMimeType, parse) {

 return function(url, row, callback) {
   if (arguments.length < 3) callback = row, row = null;
   var r = request(url).mimeType(defaultMimeType);
   r.row = function(_) { return arguments.length ? r.response(responseOf(parse, row = _)) : row; };
   r.row(row);
   return callback ? r.get(callback) : r;
 };

};

function responseOf(parse, row) {

 return function(request$$1) {
   return parse(request$$1.responseText, row);
 };

}

var csv$1 = dsv$1("text/csv", csvParse);

var tsv$1 = dsv$1("text/tab-separated-values", tsvParse);

var array$2 = Array.prototype;

var map$3 = array$2.map; var slice$5 = array$2.slice;

var implicit = {name: "implicit"};

function ordinal(range) {

 var index = map$1(),
     domain = [],
     unknown = implicit;

 range = range == null ? [] : slice$5.call(range);

 function scale(d) {
   var key = d + "", i = index.get(key);
   if (!i) {
     if (unknown !== implicit) return unknown;
     index.set(key, i = domain.push(d));
   }
   return range[(i - 1) % range.length];
 }

 scale.domain = function(_) {
   if (!arguments.length) return domain.slice();
   domain = [], index = map$1();
   var i = -1, n = _.length, d, key;
   while (++i < n) if (!index.has(key = (d = _[i]) + "")) index.set(key, domain.push(d));
   return scale;
 };

 scale.range = function(_) {
   return arguments.length ? (range = slice$5.call(_), scale) : range.slice();
 };

 scale.unknown = function(_) {
   return arguments.length ? (unknown = _, scale) : unknown;
 };

 scale.copy = function() {
   return ordinal()
       .domain(domain)
       .range(range)
       .unknown(unknown);
 };

 return scale;

}

function band() {

 var scale = ordinal().unknown(undefined),
     domain = scale.domain,
     ordinalRange = scale.range,
     range$$1 = [0, 1],
     step,
     bandwidth,
     round = false,
     paddingInner = 0,
     paddingOuter = 0,
     align = 0.5;

 delete scale.unknown;

 function rescale() {
   var n = domain().length,
       reverse = range$$1[1] < range$$1[0],
       start = range$$1[reverse - 0],
       stop = range$$1[1 - reverse];
   step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2);
   if (round) step = Math.floor(step);
   start += (stop - start - step * (n - paddingInner)) * align;
   bandwidth = step * (1 - paddingInner);
   if (round) start = Math.round(start), bandwidth = Math.round(bandwidth);
   var values = sequence(n).map(function(i) { return start + step * i; });
   return ordinalRange(reverse ? values.reverse() : values);
 }

 scale.domain = function(_) {
   return arguments.length ? (domain(_), rescale()) : domain();
 };

 scale.range = function(_) {
   return arguments.length ? (range$$1 = [+_[0], +_[1]], rescale()) : range$$1.slice();
 };

 scale.rangeRound = function(_) {
   return range$$1 = [+_[0], +_[1]], round = true, rescale();
 };

 scale.bandwidth = function() {
   return bandwidth;
 };

 scale.step = function() {
   return step;
 };

 scale.round = function(_) {
   return arguments.length ? (round = !!_, rescale()) : round;
 };

 scale.padding = function(_) {
   return arguments.length ? (paddingInner = paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;
 };

 scale.paddingInner = function(_) {
   return arguments.length ? (paddingInner = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;
 };

 scale.paddingOuter = function(_) {
   return arguments.length ? (paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingOuter;
 };

 scale.align = function(_) {
   return arguments.length ? (align = Math.max(0, Math.min(1, _)), rescale()) : align;
 };

 scale.copy = function() {
   return band()
       .domain(domain())
       .range(range$$1)
       .round(round)
       .paddingInner(paddingInner)
       .paddingOuter(paddingOuter)
       .align(align);
 };

 return rescale();

}

function pointish(scale) {

 var copy = scale.copy;

 scale.padding = scale.paddingOuter;
 delete scale.paddingInner;
 delete scale.paddingOuter;

 scale.copy = function() {
   return pointish(copy());
 };

 return scale;

}

function point$1() {

 return pointish(band().paddingInner(1));

}

var constant$9 = function(x) {

 return function() {
   return x;
 };

};

var number$2 = function(x) {

 return +x;

};

var unit = [0, 1];

function deinterpolateLinear(a, b) {

 return (b -= (a = +a))
     ? function(x) { return (x - a) / b; }
     : constant$9(b);

}

function deinterpolateClamp(deinterpolate) {

 return function(a, b) {
   var d = deinterpolate(a = +a, b = +b);
   return function(x) { return x <= a ? 0 : x >= b ? 1 : d(x); };
 };

}

function reinterpolateClamp(reinterpolate) {

 return function(a, b) {
   var r = reinterpolate(a = +a, b = +b);
   return function(t) { return t <= 0 ? a : t >= 1 ? b : r(t); };
 };

}

function bimap(domain, range, deinterpolate, reinterpolate) {

 var d0 = domain[0], d1 = domain[1], r0 = range[0], r1 = range[1];
 if (d1 < d0) d0 = deinterpolate(d1, d0), r0 = reinterpolate(r1, r0);
 else d0 = deinterpolate(d0, d1), r0 = reinterpolate(r0, r1);
 return function(x) { return r0(d0(x)); };

}

function polymap(domain, range, deinterpolate, reinterpolate) {

 var j = Math.min(domain.length, range.length) - 1,
     d = new Array(j),
     r = new Array(j),
     i = -1;

 // Reverse descending domains.
 if (domain[j] < domain[0]) {
   domain = domain.slice().reverse();
   range = range.slice().reverse();
 }

 while (++i < j) {
   d[i] = deinterpolate(domain[i], domain[i + 1]);
   r[i] = reinterpolate(range[i], range[i + 1]);
 }

 return function(x) {
   var i = bisectRight(domain, x, 1, j) - 1;
   return r[i](d[i](x));
 };

}

function copy(source, target) {

 return target
     .domain(source.domain())
     .range(source.range())
     .interpolate(source.interpolate())
     .clamp(source.clamp());

}

// deinterpolate(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1]. // reinterpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding domain value x in [a,b]. function continuous(deinterpolate, reinterpolate) {

 var domain = unit,
     range = unit,
     interpolate$$1 = interpolateValue,
     clamp = false,
     piecewise,
     output,
     input;

 function rescale() {
   piecewise = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
   output = input = null;
   return scale;
 }

 function scale(x) {
   return (output || (output = piecewise(domain, range, clamp ? deinterpolateClamp(deinterpolate) : deinterpolate, interpolate$$1)))(+x);
 }

 scale.invert = function(y) {
   return (input || (input = piecewise(range, domain, deinterpolateLinear, clamp ? reinterpolateClamp(reinterpolate) : reinterpolate)))(+y);
 };

 scale.domain = function(_) {
   return arguments.length ? (domain = map$3.call(_, number$2), rescale()) : domain.slice();
 };

 scale.range = function(_) {
   return arguments.length ? (range = slice$5.call(_), rescale()) : range.slice();
 };

 scale.rangeRound = function(_) {
   return range = slice$5.call(_), interpolate$$1 = interpolateRound, rescale();
 };

 scale.clamp = function(_) {
   return arguments.length ? (clamp = !!_, rescale()) : clamp;
 };

 scale.interpolate = function(_) {
   return arguments.length ? (interpolate$$1 = _, rescale()) : interpolate$$1;
 };

 return rescale();

}

var tickFormat = function(domain, count, specifier) {

 var start = domain[0],
     stop = domain[domain.length - 1],
     step = tickStep(start, stop, count == null ? 10 : count),
     precision;
 specifier = formatSpecifier(specifier == null ? ",f" : specifier);
 switch (specifier.type) {
   case "s": {
     var value = Math.max(Math.abs(start), Math.abs(stop));
     if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
     return exports.formatPrefix(specifier, value);
   }
   case "":
   case "e":
   case "g":
   case "p":
   case "r": {
     if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
     break;
   }
   case "f":
   case "%": {
     if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
     break;
   }
 }
 return exports.format(specifier);

};

function linearish(scale) {

 var domain = scale.domain;

 scale.ticks = function(count) {
   var d = domain();
   return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
 };

 scale.tickFormat = function(count, specifier) {
   return tickFormat(domain(), count, specifier);
 };

 scale.nice = function(count) {
   if (count == null) count = 10;

   var d = domain(),
       i0 = 0,
       i1 = d.length - 1,
       start = d[i0],
       stop = d[i1],
       step;

   if (stop < start) {
     step = start, start = stop, stop = step;
     step = i0, i0 = i1, i1 = step;
   }

   step = tickIncrement(start, stop, count);

   if (step > 0) {
     start = Math.floor(start / step) * step;
     stop = Math.ceil(stop / step) * step;
     step = tickIncrement(start, stop, count);
   } else if (step < 0) {
     start = Math.ceil(start * step) / step;
     stop = Math.floor(stop * step) / step;
     step = tickIncrement(start, stop, count);
   }

   if (step > 0) {
     d[i0] = Math.floor(start / step) * step;
     d[i1] = Math.ceil(stop / step) * step;
     domain(d);
   } else if (step < 0) {
     d[i0] = Math.ceil(start * step) / step;
     d[i1] = Math.floor(stop * step) / step;
     domain(d);
   }

   return scale;
 };

 return scale;

}

function linear$2() {

 var scale = continuous(deinterpolateLinear, reinterpolate);

 scale.copy = function() {
   return copy(scale, linear$2());
 };

 return linearish(scale);

}

function identity$6() {

 var domain = [0, 1];

 function scale(x) {
   return +x;
 }

 scale.invert = scale;

 scale.domain = scale.range = function(_) {
   return arguments.length ? (domain = map$3.call(_, number$2), scale) : domain.slice();
 };

 scale.copy = function() {
   return identity$6().domain(domain);
 };

 return linearish(scale);

}

var nice = function(domain, interval) {

 domain = domain.slice();

 var i0 = 0,
     i1 = domain.length - 1,
     x0 = domain[i0],
     x1 = domain[i1],
     t;

 if (x1 < x0) {
   t = i0, i0 = i1, i1 = t;
   t = x0, x0 = x1, x1 = t;
 }

 domain[i0] = interval.floor(x0);
 domain[i1] = interval.ceil(x1);
 return domain;

};

function deinterpolate(a, b) {

 return (b = Math.log(b / a))
     ? function(x) { return Math.log(x / a) / b; }
     : constant$9(b);

}

function reinterpolate$1(a, b) {

 return a < 0
     ? function(t) { return -Math.pow(-b, t) * Math.pow(-a, 1 - t); }
     : function(t) { return Math.pow(b, t) * Math.pow(a, 1 - t); };

}

function pow10(x) {

 return isFinite(x) ? +("1e" + x) : x < 0 ? 0 : x;

}

function powp(base) {

 return base === 10 ? pow10
     : base === Math.E ? Math.exp
     : function(x) { return Math.pow(base, x); };

}

function logp(base) {

 return base === Math.E ? Math.log
     : base === 10 && Math.log10
     || base === 2 && Math.log2
     || (base = Math.log(base), function(x) { return Math.log(x) / base; });

}

function reflect(f) {

 return function(x) {
   return -f(-x);
 };

}

function log$1() {

 var scale = continuous(deinterpolate, reinterpolate$1).domain([1, 10]),
     domain = scale.domain,
     base = 10,
     logs = logp(10),
     pows = powp(10);

 function rescale() {
   logs = logp(base), pows = powp(base);
   if (domain()[0] < 0) logs = reflect(logs), pows = reflect(pows);
   return scale;
 }

 scale.base = function(_) {
   return arguments.length ? (base = +_, rescale()) : base;
 };

 scale.domain = function(_) {
   return arguments.length ? (domain(_), rescale()) : domain();
 };

 scale.ticks = function(count) {
   var d = domain(),
       u = d[0],
       v = d[d.length - 1],
       r;

   if (r = v < u) i = u, u = v, v = i;

   var i = logs(u),
       j = logs(v),
       p,
       k,
       t,
       n = count == null ? 10 : +count,
       z = [];

   if (!(base % 1) && j - i < n) {
     i = Math.round(i) - 1, j = Math.round(j) + 1;
     if (u > 0) for (; i < j; ++i) {
       for (k = 1, p = pows(i); k < base; ++k) {
         t = p * k;
         if (t < u) continue;
         if (t > v) break;
         z.push(t);
       }
     } else for (; i < j; ++i) {
       for (k = base - 1, p = pows(i); k >= 1; --k) {
         t = p * k;
         if (t < u) continue;
         if (t > v) break;
         z.push(t);
       }
     }
   } else {
     z = ticks(i, j, Math.min(j - i, n)).map(pows);
   }

   return r ? z.reverse() : z;
 };

 scale.tickFormat = function(count, specifier) {
   if (specifier == null) specifier = base === 10 ? ".0e" : ",";
   if (typeof specifier !== "function") specifier = exports.format(specifier);
   if (count === Infinity) return specifier;
   if (count == null) count = 10;
   var k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate?
   return function(d) {
     var i = d / pows(Math.round(logs(d)));
     if (i * base < base - 0.5) i *= base;
     return i <= k ? specifier(d) : "";
   };
 };

 scale.nice = function() {
   return domain(nice(domain(), {
     floor: function(x) { return pows(Math.floor(logs(x))); },
     ceil: function(x) { return pows(Math.ceil(logs(x))); }
   }));
 };

 scale.copy = function() {
   return copy(scale, log$1().base(base));
 };

 return scale;

}

function raise$1(x, exponent) {

 return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);

}

function pow$1() {

 var exponent = 1,
     scale = continuous(deinterpolate, reinterpolate),
     domain = scale.domain;

 function deinterpolate(a, b) {
   return (b = raise$1(b, exponent) - (a = raise$1(a, exponent)))
       ? function(x) { return (raise$1(x, exponent) - a) / b; }
       : constant$9(b);
 }

 function reinterpolate(a, b) {
   b = raise$1(b, exponent) - (a = raise$1(a, exponent));
   return function(t) { return raise$1(a + b * t, 1 / exponent); };
 }

 scale.exponent = function(_) {
   return arguments.length ? (exponent = +_, domain(domain())) : exponent;
 };

 scale.copy = function() {
   return copy(scale, pow$1().exponent(exponent));
 };

 return linearish(scale);

}

function sqrt$1() {

 return pow$1().exponent(0.5);

}

function quantile$$1() {

 var domain = [],
     range = [],
     thresholds = [];

 function rescale() {
   var i = 0, n = Math.max(1, range.length);
   thresholds = new Array(n - 1);
   while (++i < n) thresholds[i - 1] = threshold(domain, i / n);
   return scale;
 }

 function scale(x) {
   if (!isNaN(x = +x)) return range[bisectRight(thresholds, x)];
 }

 scale.invertExtent = function(y) {
   var i = range.indexOf(y);
   return i < 0 ? [NaN, NaN] : [
     i > 0 ? thresholds[i - 1] : domain[0],
     i < thresholds.length ? thresholds[i] : domain[domain.length - 1]
   ];
 };

 scale.domain = function(_) {
   if (!arguments.length) return domain.slice();
   domain = [];
   for (var i = 0, n = _.length, d; i < n; ++i) if (d = _[i], d != null && !isNaN(d = +d)) domain.push(d);
   domain.sort(ascending);
   return rescale();
 };

 scale.range = function(_) {
   return arguments.length ? (range = slice$5.call(_), rescale()) : range.slice();
 };

 scale.quantiles = function() {
   return thresholds.slice();
 };

 scale.copy = function() {
   return quantile$$1()
       .domain(domain)
       .range(range);
 };

 return scale;

}

function quantize$1() {

 var x0 = 0,
     x1 = 1,
     n = 1,
     domain = [0.5],
     range = [0, 1];

 function scale(x) {
   if (x <= x) return range[bisectRight(domain, x, 0, n)];
 }

 function rescale() {
   var i = -1;
   domain = new Array(n);
   while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
   return scale;
 }

 scale.domain = function(_) {
   return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1];
 };

 scale.range = function(_) {
   return arguments.length ? (n = (range = slice$5.call(_)).length - 1, rescale()) : range.slice();
 };

 scale.invertExtent = function(y) {
   var i = range.indexOf(y);
   return i < 0 ? [NaN, NaN]
       : i < 1 ? [x0, domain[0]]
       : i >= n ? [domain[n - 1], x1]
       : [domain[i - 1], domain[i]];
 };

 scale.copy = function() {
   return quantize$1()
       .domain([x0, x1])
       .range(range);
 };

 return linearish(scale);

}

function threshold$1() {

 var domain = [0.5],
     range = [0, 1],
     n = 1;

 function scale(x) {
   if (x <= x) return range[bisectRight(domain, x, 0, n)];
 }

 scale.domain = function(_) {
   return arguments.length ? (domain = slice$5.call(_), n = Math.min(domain.length, range.length - 1), scale) : domain.slice();
 };

 scale.range = function(_) {
   return arguments.length ? (range = slice$5.call(_), n = Math.min(domain.length, range.length - 1), scale) : range.slice();
 };

 scale.invertExtent = function(y) {
   var i = range.indexOf(y);
   return [domain[i - 1], domain[i]];
 };

 scale.copy = function() {
   return threshold$1()
       .domain(domain)
       .range(range);
 };

 return scale;

}

var t0$1 = new Date; var t1$1 = new Date;

function newInterval(floori, offseti, count, field) {

 function interval(date) {
   return floori(date = new Date(+date)), date;
 }

 interval.floor = interval;

 interval.ceil = function(date) {
   return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
 };

 interval.round = function(date) {
   var d0 = interval(date),
       d1 = interval.ceil(date);
   return date - d0 < d1 - date ? d0 : d1;
 };

 interval.offset = function(date, step) {
   return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;
 };

 interval.range = function(start, stop, step) {
   var range = [];
   start = interval.ceil(start);
   step = step == null ? 1 : Math.floor(step);
   if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date
   do range.push(new Date(+start)); while (offseti(start, step), floori(start), start < stop)
   return range;
 };

 interval.filter = function(test) {
   return newInterval(function(date) {
     if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);
   }, function(date, step) {
     if (date >= date) {
       if (step < 0) while (++step <= 0) {
         while (offseti(date, -1), !test(date)) {} // eslint-disable-line no-empty
       } else while (--step >= 0) {
         while (offseti(date, +1), !test(date)) {} // eslint-disable-line no-empty
       }
     }
   });
 };

 if (count) {
   interval.count = function(start, end) {
     t0$1.setTime(+start), t1$1.setTime(+end);
     floori(t0$1), floori(t1$1);
     return Math.floor(count(t0$1, t1$1));
   };

   interval.every = function(step) {
     step = Math.floor(step);
     return !isFinite(step) || !(step > 0) ? null
         : !(step > 1) ? interval
         : interval.filter(field
             ? function(d) { return field(d) % step === 0; }
             : function(d) { return interval.count(0, d) % step === 0; });
   };
 }

 return interval;

}

var millisecond = newInterval(function() {

 // noop

}, function(date, step) {

 date.setTime(+date + step);

}, function(start, end) {

 return end - start;

});

// An optimized implementation for this simple case. millisecond.every = function(k) {

 k = Math.floor(k);
 if (!isFinite(k) || !(k > 0)) return null;
 if (!(k > 1)) return millisecond;
 return newInterval(function(date) {
   date.setTime(Math.floor(date / k) * k);
 }, function(date, step) {
   date.setTime(+date + step * k);
 }, function(start, end) {
   return (end - start) / k;
 });

};

var milliseconds = millisecond.range;

var durationSecond$1 = 1e3; var durationMinute$1 = 6e4; var durationHour$1 = 36e5; var durationDay$1 = 864e5; var durationWeek$1 = 6048e5;

var second = newInterval(function(date) {

 date.setTime(Math.floor(date / durationSecond$1) * durationSecond$1);

}, function(date, step) {

 date.setTime(+date + step * durationSecond$1);

}, function(start, end) {

 return (end - start) / durationSecond$1;

}, function(date) {

 return date.getUTCSeconds();

});

var seconds = second.range;

var minute = newInterval(function(date) {

 date.setTime(Math.floor(date / durationMinute$1) * durationMinute$1);

}, function(date, step) {

 date.setTime(+date + step * durationMinute$1);

}, function(start, end) {

 return (end - start) / durationMinute$1;

}, function(date) {

 return date.getMinutes();

});

var minutes = minute.range;

var hour = newInterval(function(date) {

 var offset = date.getTimezoneOffset() * durationMinute$1 % durationHour$1;
 if (offset < 0) offset += durationHour$1;
 date.setTime(Math.floor((+date - offset) / durationHour$1) * durationHour$1 + offset);

}, function(date, step) {

 date.setTime(+date + step * durationHour$1);

}, function(start, end) {

 return (end - start) / durationHour$1;

}, function(date) {

 return date.getHours();

});

var hours = hour.range;

var day = newInterval(function(date) {

 date.setHours(0, 0, 0, 0);

}, function(date, step) {

 date.setDate(date.getDate() + step);

}, function(start, end) {

 return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationDay$1;

}, function(date) {

 return date.getDate() - 1;

});

var days = day.range;

function weekday(i) {

 return newInterval(function(date) {
   date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);
   date.setHours(0, 0, 0, 0);
 }, function(date, step) {
   date.setDate(date.getDate() + step * 7);
 }, function(start, end) {
   return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationWeek$1;
 });

}

var sunday = weekday(0); var monday = weekday(1); var tuesday = weekday(2); var wednesday = weekday(3); var thursday = weekday(4); var friday = weekday(5); var saturday = weekday(6);

var sundays = sunday.range; var mondays = monday.range; var tuesdays = tuesday.range; var wednesdays = wednesday.range; var thursdays = thursday.range; var fridays = friday.range; var saturdays = saturday.range;

var month = newInterval(function(date) {

 date.setDate(1);
 date.setHours(0, 0, 0, 0);

}, function(date, step) {

 date.setMonth(date.getMonth() + step);

}, function(start, end) {

 return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;

}, function(date) {

 return date.getMonth();

});

var months = month.range;

var year = newInterval(function(date) {

 date.setMonth(0, 1);
 date.setHours(0, 0, 0, 0);

}, function(date, step) {

 date.setFullYear(date.getFullYear() + step);

}, function(start, end) {

 return end.getFullYear() - start.getFullYear();

}, function(date) {

 return date.getFullYear();

});

// An optimized implementation for this simple case. year.every = function(k) {

 return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
   date.setFullYear(Math.floor(date.getFullYear() / k) * k);
   date.setMonth(0, 1);
   date.setHours(0, 0, 0, 0);
 }, function(date, step) {
   date.setFullYear(date.getFullYear() + step * k);
 });

};

var years = year.range;

var utcMinute = newInterval(function(date) {

 date.setUTCSeconds(0, 0);

}, function(date, step) {

 date.setTime(+date + step * durationMinute$1);

}, function(start, end) {

 return (end - start) / durationMinute$1;

}, function(date) {

 return date.getUTCMinutes();

});

var utcMinutes = utcMinute.range;

var utcHour = newInterval(function(date) {

 date.setUTCMinutes(0, 0, 0);

}, function(date, step) {

 date.setTime(+date + step * durationHour$1);

}, function(start, end) {

 return (end - start) / durationHour$1;

}, function(date) {

 return date.getUTCHours();

});

var utcHours = utcHour.range;

var utcDay = newInterval(function(date) {

 date.setUTCHours(0, 0, 0, 0);

}, function(date, step) {

 date.setUTCDate(date.getUTCDate() + step);

}, function(start, end) {

 return (end - start) / durationDay$1;

}, function(date) {

 return date.getUTCDate() - 1;

});

var utcDays = utcDay.range;

function utcWeekday(i) {

 return newInterval(function(date) {
   date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);
   date.setUTCHours(0, 0, 0, 0);
 }, function(date, step) {
   date.setUTCDate(date.getUTCDate() + step * 7);
 }, function(start, end) {
   return (end - start) / durationWeek$1;
 });

}

var utcSunday = utcWeekday(0); var utcMonday = utcWeekday(1); var utcTuesday = utcWeekday(2); var utcWednesday = utcWeekday(3); var utcThursday = utcWeekday(4); var utcFriday = utcWeekday(5); var utcSaturday = utcWeekday(6);

var utcSundays = utcSunday.range; var utcMondays = utcMonday.range; var utcTuesdays = utcTuesday.range; var utcWednesdays = utcWednesday.range; var utcThursdays = utcThursday.range; var utcFridays = utcFriday.range; var utcSaturdays = utcSaturday.range;

var utcMonth = newInterval(function(date) {

 date.setUTCDate(1);
 date.setUTCHours(0, 0, 0, 0);

}, function(date, step) {

 date.setUTCMonth(date.getUTCMonth() + step);

}, function(start, end) {

 return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;

}, function(date) {

 return date.getUTCMonth();

});

var utcMonths = utcMonth.range;

var utcYear = newInterval(function(date) {

 date.setUTCMonth(0, 1);
 date.setUTCHours(0, 0, 0, 0);

}, function(date, step) {

 date.setUTCFullYear(date.getUTCFullYear() + step);

}, function(start, end) {

 return end.getUTCFullYear() - start.getUTCFullYear();

}, function(date) {

 return date.getUTCFullYear();

});

// An optimized implementation for this simple case. utcYear.every = function(k) {

 return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
   date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);
   date.setUTCMonth(0, 1);
   date.setUTCHours(0, 0, 0, 0);
 }, function(date, step) {
   date.setUTCFullYear(date.getUTCFullYear() + step * k);
 });

};

var utcYears = utcYear.range;

function localDate(d) {

 if (0 <= d.y && d.y < 100) {
   var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);
   date.setFullYear(d.y);
   return date;
 }
 return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);

}

function utcDate(d) {

 if (0 <= d.y && d.y < 100) {
   var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));
   date.setUTCFullYear(d.y);
   return date;
 }
 return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));

}

function newYear(y) {

 return {y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0};

}

function formatLocale$1(locale) {

 var locale_dateTime = locale.dateTime,
     locale_date = locale.date,
     locale_time = locale.time,
     locale_periods = locale.periods,
     locale_weekdays = locale.days,
     locale_shortWeekdays = locale.shortDays,
     locale_months = locale.months,
     locale_shortMonths = locale.shortMonths;

 var periodRe = formatRe(locale_periods),
     periodLookup = formatLookup(locale_periods),
     weekdayRe = formatRe(locale_weekdays),
     weekdayLookup = formatLookup(locale_weekdays),
     shortWeekdayRe = formatRe(locale_shortWeekdays),
     shortWeekdayLookup = formatLookup(locale_shortWeekdays),
     monthRe = formatRe(locale_months),
     monthLookup = formatLookup(locale_months),
     shortMonthRe = formatRe(locale_shortMonths),
     shortMonthLookup = formatLookup(locale_shortMonths);

 var formats = {
   "a": formatShortWeekday,
   "A": formatWeekday,
   "b": formatShortMonth,
   "B": formatMonth,
   "c": null,
   "d": formatDayOfMonth,
   "e": formatDayOfMonth,
   "H": formatHour24,
   "I": formatHour12,
   "j": formatDayOfYear,
   "L": formatMilliseconds,
   "m": formatMonthNumber,
   "M": formatMinutes,
   "p": formatPeriod,
   "S": formatSeconds,
   "U": formatWeekNumberSunday,
   "w": formatWeekdayNumber,
   "W": formatWeekNumberMonday,
   "x": null,
   "X": null,
   "y": formatYear,
   "Y": formatFullYear,
   "Z": formatZone,
   "%": formatLiteralPercent
 };

 var utcFormats = {
   "a": formatUTCShortWeekday,
   "A": formatUTCWeekday,
   "b": formatUTCShortMonth,
   "B": formatUTCMonth,
   "c": null,
   "d": formatUTCDayOfMonth,
   "e": formatUTCDayOfMonth,
   "H": formatUTCHour24,
   "I": formatUTCHour12,
   "j": formatUTCDayOfYear,
   "L": formatUTCMilliseconds,
   "m": formatUTCMonthNumber,
   "M": formatUTCMinutes,
   "p": formatUTCPeriod,
   "S": formatUTCSeconds,
   "U": formatUTCWeekNumberSunday,
   "w": formatUTCWeekdayNumber,
   "W": formatUTCWeekNumberMonday,
   "x": null,
   "X": null,
   "y": formatUTCYear,
   "Y": formatUTCFullYear,
   "Z": formatUTCZone,
   "%": formatLiteralPercent
 };

 var parses = {
   "a": parseShortWeekday,
   "A": parseWeekday,
   "b": parseShortMonth,
   "B": parseMonth,
   "c": parseLocaleDateTime,
   "d": parseDayOfMonth,
   "e": parseDayOfMonth,
   "H": parseHour24,
   "I": parseHour24,
   "j": parseDayOfYear,
   "L": parseMilliseconds,
   "m": parseMonthNumber,
   "M": parseMinutes,
   "p": parsePeriod,
   "S": parseSeconds,
   "U": parseWeekNumberSunday,
   "w": parseWeekdayNumber,
   "W": parseWeekNumberMonday,
   "x": parseLocaleDate,
   "X": parseLocaleTime,
   "y": parseYear,
   "Y": parseFullYear,
   "Z": parseZone,
   "%": parseLiteralPercent
 };

 // These recursive directive definitions must be deferred.
 formats.x = newFormat(locale_date, formats);
 formats.X = newFormat(locale_time, formats);
 formats.c = newFormat(locale_dateTime, formats);
 utcFormats.x = newFormat(locale_date, utcFormats);
 utcFormats.X = newFormat(locale_time, utcFormats);
 utcFormats.c = newFormat(locale_dateTime, utcFormats);

 function newFormat(specifier, formats) {
   return function(date) {
     var string = [],
         i = -1,
         j = 0,
         n = specifier.length,
         c,
         pad,
         format;

     if (!(date instanceof Date)) date = new Date(+date);

     while (++i < n) {
       if (specifier.charCodeAt(i) === 37) {
         string.push(specifier.slice(j, i));
         if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i);
         else pad = c === "e" ? " " : "0";
         if (format = formats[c]) c = format(date, pad);
         string.push(c);
         j = i + 1;
       }
     }

     string.push(specifier.slice(j, i));
     return string.join("");
   };
 }

 function newParse(specifier, newDate) {
   return function(string) {
     var d = newYear(1900),
         i = parseSpecifier(d, specifier, string += "", 0);
     if (i != string.length) return null;

     // The am-pm flag is 0 for AM, and 1 for PM.
     if ("p" in d) d.H = d.H % 12 + d.p * 12;

     // Convert day-of-week and week-of-year to day-of-year.
     if ("W" in d || "U" in d) {
       if (!("w" in d)) d.w = "W" in d ? 1 : 0;
       var day$$1 = "Z" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay();
       d.m = 0;
       d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day$$1 + 5) % 7 : d.w + d.U * 7 - (day$$1 + 6) % 7;
     }

     // If a time zone is specified, all fields are interpreted as UTC and then
     // offset according to the specified time zone.
     if ("Z" in d) {
       d.H += d.Z / 100 | 0;
       d.M += d.Z % 100;
       return utcDate(d);
     }

     // Otherwise, all fields are in local time.
     return newDate(d);
   };
 }

 function parseSpecifier(d, specifier, string, j) {
   var i = 0,
       n = specifier.length,
       m = string.length,
       c,
       parse;

   while (i < n) {
     if (j >= m) return -1;
     c = specifier.charCodeAt(i++);
     if (c === 37) {
       c = specifier.charAt(i++);
       parse = parses[c in pads ? specifier.charAt(i++) : c];
       if (!parse || ((j = parse(d, string, j)) < 0)) return -1;
     } else if (c != string.charCodeAt(j++)) {
       return -1;
     }
   }

   return j;
 }

 function parsePeriod(d, string, i) {
   var n = periodRe.exec(string.slice(i));
   return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1;
 }

 function parseShortWeekday(d, string, i) {
   var n = shortWeekdayRe.exec(string.slice(i));
   return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
 }

 function parseWeekday(d, string, i) {
   var n = weekdayRe.exec(string.slice(i));
   return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
 }

 function parseShortMonth(d, string, i) {
   var n = shortMonthRe.exec(string.slice(i));
   return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
 }

 function parseMonth(d, string, i) {
   var n = monthRe.exec(string.slice(i));
   return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
 }

 function parseLocaleDateTime(d, string, i) {
   return parseSpecifier(d, locale_dateTime, string, i);
 }

 function parseLocaleDate(d, string, i) {
   return parseSpecifier(d, locale_date, string, i);
 }

 function parseLocaleTime(d, string, i) {
   return parseSpecifier(d, locale_time, string, i);
 }

 function formatShortWeekday(d) {
   return locale_shortWeekdays[d.getDay()];
 }

 function formatWeekday(d) {
   return locale_weekdays[d.getDay()];
 }

 function formatShortMonth(d) {
   return locale_shortMonths[d.getMonth()];
 }

 function formatMonth(d) {
   return locale_months[d.getMonth()];
 }

 function formatPeriod(d) {
   return locale_periods[+(d.getHours() >= 12)];
 }

 function formatUTCShortWeekday(d) {
   return locale_shortWeekdays[d.getUTCDay()];
 }

 function formatUTCWeekday(d) {
   return locale_weekdays[d.getUTCDay()];
 }

 function formatUTCShortMonth(d) {
   return locale_shortMonths[d.getUTCMonth()];
 }

 function formatUTCMonth(d) {
   return locale_months[d.getUTCMonth()];
 }

 function formatUTCPeriod(d) {
   return locale_periods[+(d.getUTCHours() >= 12)];
 }

 return {
   format: function(specifier) {
     var f = newFormat(specifier += "", formats);
     f.toString = function() { return specifier; };
     return f;
   },
   parse: function(specifier) {
     var p = newParse(specifier += "", localDate);
     p.toString = function() { return specifier; };
     return p;
   },
   utcFormat: function(specifier) {
     var f = newFormat(specifier += "", utcFormats);
     f.toString = function() { return specifier; };
     return f;
   },
   utcParse: function(specifier) {
     var p = newParse(specifier, utcDate);
     p.toString = function() { return specifier; };
     return p;
   }
 };

}

var pads = {"-": "", "_": " ", "0": "0"}; var numberRe = /^\s*\d+/; var percentRe = /^%/; var requoteRe = /[\\\^\$\*\+\?\|\[\]\.\{\}]/g;

function pad(value, fill, width) {

 var sign = value < 0 ? "-" : "",
     string = (sign ? -value : value) + "",
     length = string.length;
 return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);

}

function requote(s) {

 return s.replace(requoteRe, "\\$&");

}

function formatRe(names) {

 return new RegExp("^(?:" + names.map(requote).join("|") + ")", "i");

}

function formatLookup(names) {

 var map = {}, i = -1, n = names.length;
 while (++i < n) map[names[i].toLowerCase()] = i;
 return map;

}

function parseWeekdayNumber(d, string, i) {

 var n = numberRe.exec(string.slice(i, i + 1));
 return n ? (d.w = +n[0], i + n[0].length) : -1;

}

function parseWeekNumberSunday(d, string, i) {

 var n = numberRe.exec(string.slice(i));
 return n ? (d.U = +n[0], i + n[0].length) : -1;

}

function parseWeekNumberMonday(d, string, i) {

 var n = numberRe.exec(string.slice(i));
 return n ? (d.W = +n[0], i + n[0].length) : -1;

}

function parseFullYear(d, string, i) {

 var n = numberRe.exec(string.slice(i, i + 4));
 return n ? (d.y = +n[0], i + n[0].length) : -1;

}

function parseYear(d, string, i) {

 var n = numberRe.exec(string.slice(i, i + 2));
 return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;

}

function parseZone(d, string, i) {

 var n = /^(Z)|([+-]\d\d)(?:\:?(\d\d))?/.exec(string.slice(i, i + 6));
 return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1;

}

function parseMonthNumber(d, string, i) {

 var n = numberRe.exec(string.slice(i, i + 2));
 return n ? (d.m = n[0] - 1, i + n[0].length) : -1;

}

function parseDayOfMonth(d, string, i) {

 var n = numberRe.exec(string.slice(i, i + 2));
 return n ? (d.d = +n[0], i + n[0].length) : -1;

}

function parseDayOfYear(d, string, i) {

 var n = numberRe.exec(string.slice(i, i + 3));
 return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;

}

function parseHour24(d, string, i) {

 var n = numberRe.exec(string.slice(i, i + 2));
 return n ? (d.H = +n[0], i + n[0].length) : -1;

}

function parseMinutes(d, string, i) {

 var n = numberRe.exec(string.slice(i, i + 2));
 return n ? (d.M = +n[0], i + n[0].length) : -1;

}

function parseSeconds(d, string, i) {

 var n = numberRe.exec(string.slice(i, i + 2));
 return n ? (d.S = +n[0], i + n[0].length) : -1;

}

function parseMilliseconds(d, string, i) {

 var n = numberRe.exec(string.slice(i, i + 3));
 return n ? (d.L = +n[0], i + n[0].length) : -1;

}

function parseLiteralPercent(d, string, i) {

 var n = percentRe.exec(string.slice(i, i + 1));
 return n ? i + n[0].length : -1;

}

function formatDayOfMonth(d, p) {

 return pad(d.getDate(), p, 2);

}

function formatHour24(d, p) {

 return pad(d.getHours(), p, 2);

}

function formatHour12(d, p) {

 return pad(d.getHours() % 12 || 12, p, 2);

}

function formatDayOfYear(d, p) {

 return pad(1 + day.count(year(d), d), p, 3);

}

function formatMilliseconds(d, p) {

 return pad(d.getMilliseconds(), p, 3);

}

function formatMonthNumber(d, p) {

 return pad(d.getMonth() + 1, p, 2);

}

function formatMinutes(d, p) {

 return pad(d.getMinutes(), p, 2);

}

function formatSeconds(d, p) {

 return pad(d.getSeconds(), p, 2);

}

function formatWeekNumberSunday(d, p) {

 return pad(sunday.count(year(d), d), p, 2);

}

function formatWeekdayNumber(d) {

 return d.getDay();

}

function formatWeekNumberMonday(d, p) {

 return pad(monday.count(year(d), d), p, 2);

}

function formatYear(d, p) {

 return pad(d.getFullYear() % 100, p, 2);

}

function formatFullYear(d, p) {

 return pad(d.getFullYear() % 10000, p, 4);

}

function formatZone(d) {

 var z = d.getTimezoneOffset();
 return (z > 0 ? "-" : (z *= -1, "+"))
     + pad(z / 60 | 0, "0", 2)
     + pad(z % 60, "0", 2);

}

function formatUTCDayOfMonth(d, p) {

 return pad(d.getUTCDate(), p, 2);

}

function formatUTCHour24(d, p) {

 return pad(d.getUTCHours(), p, 2);

}

function formatUTCHour12(d, p) {

 return pad(d.getUTCHours() % 12 || 12, p, 2);

}

function formatUTCDayOfYear(d, p) {

 return pad(1 + utcDay.count(utcYear(d), d), p, 3);

}

function formatUTCMilliseconds(d, p) {

 return pad(d.getUTCMilliseconds(), p, 3);

}

function formatUTCMonthNumber(d, p) {

 return pad(d.getUTCMonth() + 1, p, 2);

}

function formatUTCMinutes(d, p) {

 return pad(d.getUTCMinutes(), p, 2);

}

function formatUTCSeconds(d, p) {

 return pad(d.getUTCSeconds(), p, 2);

}

function formatUTCWeekNumberSunday(d, p) {

 return pad(utcSunday.count(utcYear(d), d), p, 2);

}

function formatUTCWeekdayNumber(d) {

 return d.getUTCDay();

}

function formatUTCWeekNumberMonday(d, p) {

 return pad(utcMonday.count(utcYear(d), d), p, 2);

}

function formatUTCYear(d, p) {

 return pad(d.getUTCFullYear() % 100, p, 2);

}

function formatUTCFullYear(d, p) {

 return pad(d.getUTCFullYear() % 10000, p, 4);

}

function formatUTCZone() {

 return "+0000";

}

function formatLiteralPercent() {

 return "%";

}

var locale$1;

defaultLocale$1({

 dateTime: "%x, %X",
 date: "%-m/%-d/%Y",
 time: "%-I:%M:%S %p",
 periods: ["AM", "PM"],
 days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
 shortDays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
 months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
 shortMonths: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]

});

function defaultLocale$1(definition) {

 locale$1 = formatLocale$1(definition);
 exports.timeFormat = locale$1.format;
 exports.timeParse = locale$1.parse;
 exports.utcFormat = locale$1.utcFormat;
 exports.utcParse = locale$1.utcParse;
 return locale$1;

}

var isoSpecifier = "%Y-%m-%dT%H:%M:%S.%LZ";

function formatIsoNative(date) {

 return date.toISOString();

}

var formatIso = Date.prototype.toISOString

   ? formatIsoNative
   : exports.utcFormat(isoSpecifier);

function parseIsoNative(string) {

 var date = new Date(string);
 return isNaN(date) ? null : date;

}

var parseIso = +new Date("2000-01-01T00:00:00.000Z")

   ? parseIsoNative
   : exports.utcParse(isoSpecifier);

var durationSecond = 1000; var durationMinute = durationSecond * 60; var durationHour = durationMinute * 60; var durationDay = durationHour * 24; var durationWeek = durationDay * 7; var durationMonth = durationDay * 30; var durationYear = durationDay * 365;

function date$1(t) {

 return new Date(t);

}

function number$3(t) {

 return t instanceof Date ? +t : +new Date(+t);

}

function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format) {

 var scale = continuous(deinterpolateLinear, reinterpolate),
     invert = scale.invert,
     domain = scale.domain;

 var formatMillisecond = format(".%L"),
     formatSecond = format(":%S"),
     formatMinute = format("%I:%M"),
     formatHour = format("%I %p"),
     formatDay = format("%a %d"),
     formatWeek = format("%b %d"),
     formatMonth = format("%B"),
     formatYear = format("%Y");

 var tickIntervals = [
   [second$$1,  1,      durationSecond],
   [second$$1,  5,  5 * durationSecond],
   [second$$1, 15, 15 * durationSecond],
   [second$$1, 30, 30 * durationSecond],
   [minute$$1,  1,      durationMinute],
   [minute$$1,  5,  5 * durationMinute],
   [minute$$1, 15, 15 * durationMinute],
   [minute$$1, 30, 30 * durationMinute],
   [  hour$$1,  1,      durationHour  ],
   [  hour$$1,  3,  3 * durationHour  ],
   [  hour$$1,  6,  6 * durationHour  ],
   [  hour$$1, 12, 12 * durationHour  ],
   [   day$$1,  1,      durationDay   ],
   [   day$$1,  2,  2 * durationDay   ],
   [  week,  1,      durationWeek  ],
   [ month$$1,  1,      durationMonth ],
   [ month$$1,  3,  3 * durationMonth ],
   [  year$$1,  1,      durationYear  ]
 ];

 function tickFormat(date) {
   return (second$$1(date) < date ? formatMillisecond
       : minute$$1(date) < date ? formatSecond
       : hour$$1(date) < date ? formatMinute
       : day$$1(date) < date ? formatHour
       : month$$1(date) < date ? (week(date) < date ? formatDay : formatWeek)
       : year$$1(date) < date ? formatMonth
       : formatYear)(date);
 }

 function tickInterval(interval, start, stop, step) {
   if (interval == null) interval = 10;

   // If a desired tick count is specified, pick a reasonable tick interval
   // based on the extent of the domain and a rough estimate of tick size.
   // Otherwise, assume interval is already a time interval and use it.
   if (typeof interval === "number") {
     var target = Math.abs(stop - start) / interval,
         i = bisector(function(i) { return i[2]; }).right(tickIntervals, target);
     if (i === tickIntervals.length) {
       step = tickStep(start / durationYear, stop / durationYear, interval);
       interval = year$$1;
     } else if (i) {
       i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];
       step = i[1];
       interval = i[0];
     } else {
       step = tickStep(start, stop, interval);
       interval = millisecond$$1;
     }
   }

   return step == null ? interval : interval.every(step);
 }

 scale.invert = function(y) {
   return new Date(invert(y));
 };

 scale.domain = function(_) {
   return arguments.length ? domain(map$3.call(_, number$3)) : domain().map(date$1);
 };

 scale.ticks = function(interval, step) {
   var d = domain(),
       t0 = d[0],
       t1 = d[d.length - 1],
       r = t1 < t0,
       t;
   if (r) t = t0, t0 = t1, t1 = t;
   t = tickInterval(interval, t0, t1, step);
   t = t ? t.range(t0, t1 + 1) : []; // inclusive stop
   return r ? t.reverse() : t;
 };

 scale.tickFormat = function(count, specifier) {
   return specifier == null ? tickFormat : format(specifier);
 };

 scale.nice = function(interval, step) {
   var d = domain();
   return (interval = tickInterval(interval, d[0], d[d.length - 1], step))
       ? domain(nice(d, interval))
       : scale;
 };

 scale.copy = function() {
   return copy(scale, calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format));
 };

 return scale;

}

var time = function() {

 return calendar(year, month, sunday, day, hour, minute, second, millisecond, exports.timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]);

};

var utcTime = function() {

 return calendar(utcYear, utcMonth, utcSunday, utcDay, utcHour, utcMinute, second, millisecond, exports.utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]);

};

var colors = function(s) {

 return s.match(/.{6}/g).map(function(x) {
   return "#" + x;
 });

};

var category10 = colors("1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf");

var category20b = colors("393b795254a36b6ecf9c9ede6379398ca252b5cf6bcedb9c8c6d31bd9e39e7ba52e7cb94843c39ad494ad6616be7969c7b4173a55194ce6dbdde9ed6");

var category20c = colors("3182bd6baed69ecae1c6dbefe6550dfd8d3cfdae6bfdd0a231a35474c476a1d99bc7e9c0756bb19e9ac8bcbddcdadaeb636363969696bdbdbdd9d9d9");

var category20 = colors("1f77b4aec7e8ff7f0effbb782ca02c98df8ad62728ff98969467bdc5b0d58c564bc49c94e377c2f7b6d27f7f7fc7c7c7bcbd22dbdb8d17becf9edae5");

var cubehelix$3 = cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0));

var warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8));

var cool = cubehelixLong(cubehelix(260, 0.75, 0.35), cubehelix(80, 1.50, 0.8));

var rainbow = cubehelix();

var rainbow$1 = function(t) {

 if (t < 0 || t > 1) t -= Math.floor(t);
 var ts = Math.abs(t - 0.5);
 rainbow.h = 360 * t - 100;
 rainbow.s = 1.5 - 1.5 * ts;
 rainbow.l = 0.8 - 0.9 * ts;
 return rainbow + "";

};

function ramp(range) {

 var n = range.length;
 return function(t) {
   return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
 };

}

var viridis = ramp(colors("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"));

var magma = ramp(colors("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"));

var inferno = ramp(colors("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"));

var plasma = ramp(colors("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"));

function sequential(interpolator) {

 var x0 = 0,
     x1 = 1,
     clamp = false;

 function scale(x) {
   var t = (x - x0) / (x1 - x0);
   return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t);
 }

 scale.domain = function(_) {
   return arguments.length ? (x0 = +_[0], x1 = +_[1], scale) : [x0, x1];
 };

 scale.clamp = function(_) {
   return arguments.length ? (clamp = !!_, scale) : clamp;
 };

 scale.interpolator = function(_) {
   return arguments.length ? (interpolator = _, scale) : interpolator;
 };

 scale.copy = function() {
   return sequential(interpolator).domain([x0, x1]).clamp(clamp);
 };

 return linearish(scale);

}

var constant$10 = function(x) {

 return function constant() {
   return x;
 };

};

var abs$1 = Math.abs; var atan2$1 = Math.atan2; var cos$2 = Math.cos; var max$2 = Math.max; var min$1 = Math.min; var sin$2 = Math.sin; var sqrt$2 = Math.sqrt;

var epsilon$3 = 1e-12; var pi$4 = Math.PI; var halfPi$3 = pi$4 / 2; var tau$4 = 2 * pi$4;

function acos$1(x) {

 return x > 1 ? 0 : x < -1 ? pi$4 : Math.acos(x);

}

function asin$1(x) {

 return x >= 1 ? halfPi$3 : x <= -1 ? -halfPi$3 : Math.asin(x);

}

function arcInnerRadius(d) {

 return d.innerRadius;

}

function arcOuterRadius(d) {

 return d.outerRadius;

}

function arcStartAngle(d) {

 return d.startAngle;

}

function arcEndAngle(d) {

 return d.endAngle;

}

function arcPadAngle(d) {

 return d && d.padAngle; // Note: optional!

}

function intersect(x0, y0, x1, y1, x2, y2, x3, y3) {

 var x10 = x1 - x0, y10 = y1 - y0,
     x32 = x3 - x2, y32 = y3 - y2,
     t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / (y32 * x10 - x32 * y10);
 return [x0 + t * x10, y0 + t * y10];

}

// Compute perpendicular offset line of length rc. // http://mathworld.wolfram.com/Circle-LineIntersection.html function cornerTangents(x0, y0, x1, y1, r1, rc, cw) {

 var x01 = x0 - x1,
     y01 = y0 - y1,
     lo = (cw ? rc : -rc) / sqrt$2(x01 * x01 + y01 * y01),
     ox = lo * y01,
     oy = -lo * x01,
     x11 = x0 + ox,
     y11 = y0 + oy,
     x10 = x1 + ox,
     y10 = y1 + oy,
     x00 = (x11 + x10) / 2,
     y00 = (y11 + y10) / 2,
     dx = x10 - x11,
     dy = y10 - y11,
     d2 = dx * dx + dy * dy,
     r = r1 - rc,
     D = x11 * y10 - x10 * y11,
     d = (dy < 0 ? -1 : 1) * sqrt$2(max$2(0, r * r * d2 - D * D)),
     cx0 = (D * dy - dx * d) / d2,
     cy0 = (-D * dx - dy * d) / d2,
     cx1 = (D * dy + dx * d) / d2,
     cy1 = (-D * dx + dy * d) / d2,
     dx0 = cx0 - x00,
     dy0 = cy0 - y00,
     dx1 = cx1 - x00,
     dy1 = cy1 - y00;

 // Pick the closer of the two intersection points.
 // TODO Is there a faster way to determine which intersection to use?
 if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;

 return {
   cx: cx0,
   cy: cy0,
   x01: -ox,
   y01: -oy,
   x11: cx0 * (r1 / r - 1),
   y11: cy0 * (r1 / r - 1)
 };

}

var arc = function() {

 var innerRadius = arcInnerRadius,
     outerRadius = arcOuterRadius,
     cornerRadius = constant$10(0),
     padRadius = null,
     startAngle = arcStartAngle,
     endAngle = arcEndAngle,
     padAngle = arcPadAngle,
     context = null;

 function arc() {
   var buffer,
       r,
       r0 = +innerRadius.apply(this, arguments),
       r1 = +outerRadius.apply(this, arguments),
       a0 = startAngle.apply(this, arguments) - halfPi$3,
       a1 = endAngle.apply(this, arguments) - halfPi$3,
       da = abs$1(a1 - a0),
       cw = a1 > a0;

   if (!context) context = buffer = path();

   // Ensure that the outer radius is always larger than the inner radius.
   if (r1 < r0) r = r1, r1 = r0, r0 = r;

   // Is it a point?
   if (!(r1 > epsilon$3)) context.moveTo(0, 0);

   // Or is it a circle or annulus?
   else if (da > tau$4 - epsilon$3) {
     context.moveTo(r1 * cos$2(a0), r1 * sin$2(a0));
     context.arc(0, 0, r1, a0, a1, !cw);
     if (r0 > epsilon$3) {
       context.moveTo(r0 * cos$2(a1), r0 * sin$2(a1));
       context.arc(0, 0, r0, a1, a0, cw);
     }
   }

   // Or is it a circular or annular sector?
   else {
     var a01 = a0,
         a11 = a1,
         a00 = a0,
         a10 = a1,
         da0 = da,
         da1 = da,
         ap = padAngle.apply(this, arguments) / 2,
         rp = (ap > epsilon$3) && (padRadius ? +padRadius.apply(this, arguments) : sqrt$2(r0 * r0 + r1 * r1)),
         rc = min$1(abs$1(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),
         rc0 = rc,
         rc1 = rc,
         t0,
         t1;

     // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.
     if (rp > epsilon$3) {
       var p0 = asin$1(rp / r0 * sin$2(ap)),
           p1 = asin$1(rp / r1 * sin$2(ap));
       if ((da0 -= p0 * 2) > epsilon$3) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;
       else da0 = 0, a00 = a10 = (a0 + a1) / 2;
       if ((da1 -= p1 * 2) > epsilon$3) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;
       else da1 = 0, a01 = a11 = (a0 + a1) / 2;
     }

     var x01 = r1 * cos$2(a01),
         y01 = r1 * sin$2(a01),
         x10 = r0 * cos$2(a10),
         y10 = r0 * sin$2(a10);

     // Apply rounded corners?
     if (rc > epsilon$3) {
       var x11 = r1 * cos$2(a11),
           y11 = r1 * sin$2(a11),
           x00 = r0 * cos$2(a00),
           y00 = r0 * sin$2(a00);

       // Restrict the corner radius according to the sector angle.
       if (da < pi$4) {
         var oc = da0 > epsilon$3 ? intersect(x01, y01, x00, y00, x11, y11, x10, y10) : [x10, y10],
             ax = x01 - oc[0],
             ay = y01 - oc[1],
             bx = x11 - oc[0],
             by = y11 - oc[1],
             kc = 1 / sin$2(acos$1((ax * bx + ay * by) / (sqrt$2(ax * ax + ay * ay) * sqrt$2(bx * bx + by * by))) / 2),
             lc = sqrt$2(oc[0] * oc[0] + oc[1] * oc[1]);
         rc0 = min$1(rc, (r0 - lc) / (kc - 1));
         rc1 = min$1(rc, (r1 - lc) / (kc + 1));
       }
     }

     // Is the sector collapsed to a line?
     if (!(da1 > epsilon$3)) context.moveTo(x01, y01);

     // Does the sector’s outer ring have rounded corners?
     else if (rc1 > epsilon$3) {
       t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);
       t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);

       context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);

       // Have the corners merged?
       if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, atan2$1(t0.y01, t0.x01), atan2$1(t1.y01, t1.x01), !cw);

       // Otherwise, draw the two corners and the ring.
       else {
         context.arc(t0.cx, t0.cy, rc1, atan2$1(t0.y01, t0.x01), atan2$1(t0.y11, t0.x11), !cw);
         context.arc(0, 0, r1, atan2$1(t0.cy + t0.y11, t0.cx + t0.x11), atan2$1(t1.cy + t1.y11, t1.cx + t1.x11), !cw);
         context.arc(t1.cx, t1.cy, rc1, atan2$1(t1.y11, t1.x11), atan2$1(t1.y01, t1.x01), !cw);
       }
     }

     // Or is the outer ring just a circular arc?
     else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);

     // Is there no inner ring, and it’s a circular sector?
     // Or perhaps it’s an annular sector collapsed due to padding?
     if (!(r0 > epsilon$3) || !(da0 > epsilon$3)) context.lineTo(x10, y10);

     // Does the sector’s inner ring (or point) have rounded corners?
     else if (rc0 > epsilon$3) {
       t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);
       t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);

       context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);

       // Have the corners merged?
       if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, atan2$1(t0.y01, t0.x01), atan2$1(t1.y01, t1.x01), !cw);

       // Otherwise, draw the two corners and the ring.
       else {
         context.arc(t0.cx, t0.cy, rc0, atan2$1(t0.y01, t0.x01), atan2$1(t0.y11, t0.x11), !cw);
         context.arc(0, 0, r0, atan2$1(t0.cy + t0.y11, t0.cx + t0.x11), atan2$1(t1.cy + t1.y11, t1.cx + t1.x11), cw);
         context.arc(t1.cx, t1.cy, rc0, atan2$1(t1.y11, t1.x11), atan2$1(t1.y01, t1.x01), !cw);
       }
     }

     // Or is the inner ring just a circular arc?
     else context.arc(0, 0, r0, a10, a00, cw);
   }

   context.closePath();

   if (buffer) return context = null, buffer + "" || null;
 }

 arc.centroid = function() {
   var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,
       a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi$4 / 2;
   return [cos$2(a) * r, sin$2(a) * r];
 };

 arc.innerRadius = function(_) {
   return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : innerRadius;
 };

 arc.outerRadius = function(_) {
   return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : outerRadius;
 };

 arc.cornerRadius = function(_) {
   return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : cornerRadius;
 };

 arc.padRadius = function(_) {
   return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), arc) : padRadius;
 };

 arc.startAngle = function(_) {
   return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : startAngle;
 };

 arc.endAngle = function(_) {
   return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : endAngle;
 };

 arc.padAngle = function(_) {
   return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : padAngle;
 };

 arc.context = function(_) {
   return arguments.length ? ((context = _ == null ? null : _), arc) : context;
 };

 return arc;

};

function Linear(context) {

 this._context = context;

}

Linear.prototype = {

 areaStart: function() {
   this._line = 0;
 },
 areaEnd: function() {
   this._line = NaN;
 },
 lineStart: function() {
   this._point = 0;
 },
 lineEnd: function() {
   if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
   this._line = 1 - this._line;
 },
 point: function(x, y) {
   x = +x, y = +y;
   switch (this._point) {
     case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
     case 1: this._point = 2; // proceed
     default: this._context.lineTo(x, y); break;
   }
 }

};

var curveLinear = function(context) {

 return new Linear(context);

};

function x$3(p) {

 return p[0];

}

function y$3(p) {

 return p[1];

}

var line = function() {

 var x$$1 = x$3,
     y$$1 = y$3,
     defined = constant$10(true),
     context = null,
     curve = curveLinear,
     output = null;

 function line(data) {
   var i,
       n = data.length,
       d,
       defined0 = false,
       buffer;

   if (context == null) output = curve(buffer = path());

   for (i = 0; i <= n; ++i) {
     if (!(i < n && defined(d = data[i], i, data)) === defined0) {
       if (defined0 = !defined0) output.lineStart();
       else output.lineEnd();
     }
     if (defined0) output.point(+x$$1(d, i, data), +y$$1(d, i, data));
   }

   if (buffer) return output = null, buffer + "" || null;
 }

 line.x = function(_) {
   return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$10(+_), line) : x$$1;
 };

 line.y = function(_) {
   return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$10(+_), line) : y$$1;
 };

 line.defined = function(_) {
   return arguments.length ? (defined = typeof _ === "function" ? _ : constant$10(!!_), line) : defined;
 };

 line.curve = function(_) {
   return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;
 };

 line.context = function(_) {
   return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;
 };

 return line;

};

var area$2 = function() {

 var x0 = x$3,
     x1 = null,
     y0 = constant$10(0),
     y1 = y$3,
     defined = constant$10(true),
     context = null,
     curve = curveLinear,
     output = null;

 function area(data) {
   var i,
       j,
       k,
       n = data.length,
       d,
       defined0 = false,
       buffer,
       x0z = new Array(n),
       y0z = new Array(n);

   if (context == null) output = curve(buffer = path());

   for (i = 0; i <= n; ++i) {
     if (!(i < n && defined(d = data[i], i, data)) === defined0) {
       if (defined0 = !defined0) {
         j = i;
         output.areaStart();
         output.lineStart();
       } else {
         output.lineEnd();
         output.lineStart();
         for (k = i - 1; k >= j; --k) {
           output.point(x0z[k], y0z[k]);
         }
         output.lineEnd();
         output.areaEnd();
       }
     }
     if (defined0) {
       x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);
       output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);
     }
   }

   if (buffer) return output = null, buffer + "" || null;
 }

 function arealine() {
   return line().defined(defined).curve(curve).context(context);
 }

 area.x = function(_) {
   return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$10(+_), x1 = null, area) : x0;
 };

 area.x0 = function(_) {
   return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$10(+_), area) : x0;
 };

 area.x1 = function(_) {
   return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), area) : x1;
 };

 area.y = function(_) {
   return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$10(+_), y1 = null, area) : y0;
 };

 area.y0 = function(_) {
   return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$10(+_), area) : y0;
 };

 area.y1 = function(_) {
   return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), area) : y1;
 };

 area.lineX0 =
 area.lineY0 = function() {
   return arealine().x(x0).y(y0);
 };

 area.lineY1 = function() {
   return arealine().x(x0).y(y1);
 };

 area.lineX1 = function() {
   return arealine().x(x1).y(y0);
 };

 area.defined = function(_) {
   return arguments.length ? (defined = typeof _ === "function" ? _ : constant$10(!!_), area) : defined;
 };

 area.curve = function(_) {
   return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;
 };

 area.context = function(_) {
   return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;
 };

 return area;

};

var descending$1 = function(a, b) {

 return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;

};

var identity$7 = function(d) {

 return d;

};

var pie = function() {

 var value = identity$7,
     sortValues = descending$1,
     sort = null,
     startAngle = constant$10(0),
     endAngle = constant$10(tau$4),
     padAngle = constant$10(0);

 function pie(data) {
   var i,
       n = data.length,
       j,
       k,
       sum = 0,
       index = new Array(n),
       arcs = new Array(n),
       a0 = +startAngle.apply(this, arguments),
       da = Math.min(tau$4, Math.max(-tau$4, endAngle.apply(this, arguments) - a0)),
       a1,
       p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),
       pa = p * (da < 0 ? -1 : 1),
       v;

   for (i = 0; i < n; ++i) {
     if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {
       sum += v;
     }
   }

   // Optionally sort the arcs by previously-computed values or by data.
   if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); });
   else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); });

   // Compute the arcs! They are stored in the original data's order.
   for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {
     j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {
       data: data[j],
       index: i,
       value: v,
       startAngle: a0,
       endAngle: a1,
       padAngle: p
     };
   }

   return arcs;
 }

 pie.value = function(_) {
   return arguments.length ? (value = typeof _ === "function" ? _ : constant$10(+_), pie) : value;
 };

 pie.sortValues = function(_) {
   return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;
 };

 pie.sort = function(_) {
   return arguments.length ? (sort = _, sortValues = null, pie) : sort;
 };

 pie.startAngle = function(_) {
   return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : startAngle;
 };

 pie.endAngle = function(_) {
   return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : endAngle;
 };

 pie.padAngle = function(_) {
   return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : padAngle;
 };

 return pie;

};

var curveRadialLinear = curveRadial(curveLinear);

function Radial(curve) {

 this._curve = curve;

}

Radial.prototype = {

 areaStart: function() {
   this._curve.areaStart();
 },
 areaEnd: function() {
   this._curve.areaEnd();
 },
 lineStart: function() {
   this._curve.lineStart();
 },
 lineEnd: function() {
   this._curve.lineEnd();
 },
 point: function(a, r) {
   this._curve.point(r * Math.sin(a), r * -Math.cos(a));
 }

};

function curveRadial(curve) {

 function radial(context) {
   return new Radial(curve(context));
 }

 radial._curve = curve;

 return radial;

}

function lineRadial(l) {

 var c = l.curve;

 l.angle = l.x, delete l.x;
 l.radius = l.y, delete l.y;

 l.curve = function(_) {
   return arguments.length ? c(curveRadial(_)) : c()._curve;
 };

 return l;

}

var lineRadial$1 = function() {

 return lineRadial(line().curve(curveRadialLinear));

};

var areaRadial = function() {

 var a = area$2().curve(curveRadialLinear),
     c = a.curve,
     x0 = a.lineX0,
     x1 = a.lineX1,
     y0 = a.lineY0,
     y1 = a.lineY1;

 a.angle = a.x, delete a.x;
 a.startAngle = a.x0, delete a.x0;
 a.endAngle = a.x1, delete a.x1;
 a.radius = a.y, delete a.y;
 a.innerRadius = a.y0, delete a.y0;
 a.outerRadius = a.y1, delete a.y1;
 a.lineStartAngle = function() { return lineRadial(x0()); }, delete a.lineX0;
 a.lineEndAngle = function() { return lineRadial(x1()); }, delete a.lineX1;
 a.lineInnerRadius = function() { return lineRadial(y0()); }, delete a.lineY0;
 a.lineOuterRadius = function() { return lineRadial(y1()); }, delete a.lineY1;

 a.curve = function(_) {
   return arguments.length ? c(curveRadial(_)) : c()._curve;
 };

 return a;

};

var pointRadial = function(x, y) {

 return [(y = +y) * Math.cos(x -= Math.PI / 2), y * Math.sin(x)];

};

var slice$6 = Array.prototype.slice;

function linkSource(d) {

 return d.source;

}

function linkTarget(d) {

 return d.target;

}

function link$2(curve) {

 var source = linkSource,
     target = linkTarget,
     x$$1 = x$3,
     y$$1 = y$3,
     context = null;

 function link() {
   var buffer, argv = slice$6.call(arguments), s = source.apply(this, argv), t = target.apply(this, argv);
   if (!context) context = buffer = path();
   curve(context, +x$$1.apply(this, (argv[0] = s, argv)), +y$$1.apply(this, argv), +x$$1.apply(this, (argv[0] = t, argv)), +y$$1.apply(this, argv));
   if (buffer) return context = null, buffer + "" || null;
 }

 link.source = function(_) {
   return arguments.length ? (source = _, link) : source;
 };

 link.target = function(_) {
   return arguments.length ? (target = _, link) : target;
 };

 link.x = function(_) {
   return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$10(+_), link) : x$$1;
 };

 link.y = function(_) {
   return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$10(+_), link) : y$$1;
 };

 link.context = function(_) {
   return arguments.length ? ((context = _ == null ? null : _), link) : context;
 };

 return link;

}

function curveHorizontal(context, x0, y0, x1, y1) {

 context.moveTo(x0, y0);
 context.bezierCurveTo(x0 = (x0 + x1) / 2, y0, x0, y1, x1, y1);

}

function curveVertical(context, x0, y0, x1, y1) {

 context.moveTo(x0, y0);
 context.bezierCurveTo(x0, y0 = (y0 + y1) / 2, x1, y0, x1, y1);

}

function curveRadial$1(context, x0, y0, x1, y1) {

 var p0 = pointRadial(x0, y0),
     p1 = pointRadial(x0, y0 = (y0 + y1) / 2),
     p2 = pointRadial(x1, y0),
     p3 = pointRadial(x1, y1);
 context.moveTo(p0[0], p0[1]);
 context.bezierCurveTo(p1[0], p1[1], p2[0], p2[1], p3[0], p3[1]);

}

function linkHorizontal() {

 return link$2(curveHorizontal);

}

function linkVertical() {

 return link$2(curveVertical);

}

function linkRadial() {

 var l = link$2(curveRadial$1);
 l.angle = l.x, delete l.x;
 l.radius = l.y, delete l.y;
 return l;

}

var circle$2 = {

 draw: function(context, size) {
   var r = Math.sqrt(size / pi$4);
   context.moveTo(r, 0);
   context.arc(0, 0, r, 0, tau$4);
 }

};

var cross$2 = {

 draw: function(context, size) {
   var r = Math.sqrt(size / 5) / 2;
   context.moveTo(-3 * r, -r);
   context.lineTo(-r, -r);
   context.lineTo(-r, -3 * r);
   context.lineTo(r, -3 * r);
   context.lineTo(r, -r);
   context.lineTo(3 * r, -r);
   context.lineTo(3 * r, r);
   context.lineTo(r, r);
   context.lineTo(r, 3 * r);
   context.lineTo(-r, 3 * r);
   context.lineTo(-r, r);
   context.lineTo(-3 * r, r);
   context.closePath();
 }

};

var tan30 = Math.sqrt(1 / 3); var tan30_2 = tan30 * 2;

var diamond = {

 draw: function(context, size) {
   var y = Math.sqrt(size / tan30_2),
       x = y * tan30;
   context.moveTo(0, -y);
   context.lineTo(x, 0);
   context.lineTo(0, y);
   context.lineTo(-x, 0);
   context.closePath();
 }

};

var ka = 0.89081309152928522810; var kr = Math.sin(pi$4 / 10) / Math.sin(7 * pi$4 / 10); var kx = Math.sin(tau$4 / 10) * kr; var ky = -Math.cos(tau$4 / 10) * kr;

var star = {

 draw: function(context, size) {
   var r = Math.sqrt(size * ka),
       x = kx * r,
       y = ky * r;
   context.moveTo(0, -r);
   context.lineTo(x, y);
   for (var i = 1; i < 5; ++i) {
     var a = tau$4 * i / 5,
         c = Math.cos(a),
         s = Math.sin(a);
     context.lineTo(s * r, -c * r);
     context.lineTo(c * x - s * y, s * x + c * y);
   }
   context.closePath();
 }

};

var square = {

 draw: function(context, size) {
   var w = Math.sqrt(size),
       x = -w / 2;
   context.rect(x, x, w, w);
 }

};

var sqrt3 = Math.sqrt(3);

var triangle = {

 draw: function(context, size) {
   var y = -Math.sqrt(size / (sqrt3 * 3));
   context.moveTo(0, y * 2);
   context.lineTo(-sqrt3 * y, -y);
   context.lineTo(sqrt3 * y, -y);
   context.closePath();
 }

};

var c = -0.5; var s = Math.sqrt(3) / 2; var k = 1 / Math.sqrt(12); var a = (k / 2 + 1) * 3;

var wye = {

 draw: function(context, size) {
   var r = Math.sqrt(size / a),
       x0 = r / 2,
       y0 = r * k,
       x1 = x0,
       y1 = r * k + r,
       x2 = -x1,
       y2 = y1;
   context.moveTo(x0, y0);
   context.lineTo(x1, y1);
   context.lineTo(x2, y2);
   context.lineTo(c * x0 - s * y0, s * x0 + c * y0);
   context.lineTo(c * x1 - s * y1, s * x1 + c * y1);
   context.lineTo(c * x2 - s * y2, s * x2 + c * y2);
   context.lineTo(c * x0 + s * y0, c * y0 - s * x0);
   context.lineTo(c * x1 + s * y1, c * y1 - s * x1);
   context.lineTo(c * x2 + s * y2, c * y2 - s * x2);
   context.closePath();
 }

};

var symbols = [

 circle$2,
 cross$2,
 diamond,
 square,
 star,
 triangle,
 wye

];

var symbol = function() {

 var type = constant$10(circle$2),
     size = constant$10(64),
     context = null;

 function symbol() {
   var buffer;
   if (!context) context = buffer = path();
   type.apply(this, arguments).draw(context, +size.apply(this, arguments));
   if (buffer) return context = null, buffer + "" || null;
 }

 symbol.type = function(_) {
   return arguments.length ? (type = typeof _ === "function" ? _ : constant$10(_), symbol) : type;
 };

 symbol.size = function(_) {
   return arguments.length ? (size = typeof _ === "function" ? _ : constant$10(+_), symbol) : size;
 };

 symbol.context = function(_) {
   return arguments.length ? (context = _ == null ? null : _, symbol) : context;
 };

 return symbol;

};

var noop$2 = function() {};

function point$2(that, x, y) {

 that._context.bezierCurveTo(
   (2 * that._x0 + that._x1) / 3,
   (2 * that._y0 + that._y1) / 3,
   (that._x0 + 2 * that._x1) / 3,
   (that._y0 + 2 * that._y1) / 3,
   (that._x0 + 4 * that._x1 + x) / 6,
   (that._y0 + 4 * that._y1 + y) / 6
 );

}

function Basis(context) {

 this._context = context;

}

Basis.prototype = {

 areaStart: function() {
   this._line = 0;
 },
 areaEnd: function() {
   this._line = NaN;
 },
 lineStart: function() {
   this._x0 = this._x1 =
   this._y0 = this._y1 = NaN;
   this._point = 0;
 },
 lineEnd: function() {
   switch (this._point) {
     case 3: point$2(this, this._x1, this._y1); // proceed
     case 2: this._context.lineTo(this._x1, this._y1); break;
   }
   if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
   this._line = 1 - this._line;
 },
 point: function(x, y) {
   x = +x, y = +y;
   switch (this._point) {
     case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
     case 1: this._point = 2; break;
     case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed
     default: point$2(this, x, y); break;
   }
   this._x0 = this._x1, this._x1 = x;
   this._y0 = this._y1, this._y1 = y;
 }

};

var basis$2 = function(context) {

 return new Basis(context);

};

function BasisClosed(context) {

 this._context = context;

}

BasisClosed.prototype = {

 areaStart: noop$2,
 areaEnd: noop$2,
 lineStart: function() {
   this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =
   this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;
   this._point = 0;
 },
 lineEnd: function() {
   switch (this._point) {
     case 1: {
       this._context.moveTo(this._x2, this._y2);
       this._context.closePath();
       break;
     }
     case 2: {
       this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);
       this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);
       this._context.closePath();
       break;
     }
     case 3: {
       this.point(this._x2, this._y2);
       this.point(this._x3, this._y3);
       this.point(this._x4, this._y4);
       break;
     }
   }
 },
 point: function(x, y) {
   x = +x, y = +y;
   switch (this._point) {
     case 0: this._point = 1; this._x2 = x, this._y2 = y; break;
     case 1: this._point = 2; this._x3 = x, this._y3 = y; break;
     case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break;
     default: point$2(this, x, y); break;
   }
   this._x0 = this._x1, this._x1 = x;
   this._y0 = this._y1, this._y1 = y;
 }

};

var basisClosed$1 = function(context) {

 return new BasisClosed(context);

};

function BasisOpen(context) {

 this._context = context;

}

BasisOpen.prototype = {

 areaStart: function() {
   this._line = 0;
 },
 areaEnd: function() {
   this._line = NaN;
 },
 lineStart: function() {
   this._x0 = this._x1 =
   this._y0 = this._y1 = NaN;
   this._point = 0;
 },
 lineEnd: function() {
   if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
   this._line = 1 - this._line;
 },
 point: function(x, y) {
   x = +x, y = +y;
   switch (this._point) {
     case 0: this._point = 1; break;
     case 1: this._point = 2; break;
     case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break;
     case 3: this._point = 4; // proceed
     default: point$2(this, x, y); break;
   }
   this._x0 = this._x1, this._x1 = x;
   this._y0 = this._y1, this._y1 = y;
 }

};

var basisOpen = function(context) {

 return new BasisOpen(context);

};

function Bundle(context, beta) {

 this._basis = new Basis(context);
 this._beta = beta;

}

Bundle.prototype = {

 lineStart: function() {
   this._x = [];
   this._y = [];
   this._basis.lineStart();
 },
 lineEnd: function() {
   var x = this._x,
       y = this._y,
       j = x.length - 1;

   if (j > 0) {
     var x0 = x[0],
         y0 = y[0],
         dx = x[j] - x0,
         dy = y[j] - y0,
         i = -1,
         t;

     while (++i <= j) {
       t = i / j;
       this._basis.point(
         this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),
         this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)
       );
     }
   }

   this._x = this._y = null;
   this._basis.lineEnd();
 },
 point: function(x, y) {
   this._x.push(+x);
   this._y.push(+y);
 }

};

var bundle = (function custom(beta) {

 function bundle(context) {
   return beta === 1 ? new Basis(context) : new Bundle(context, beta);
 }

 bundle.beta = function(beta) {
   return custom(+beta);
 };

 return bundle;

})(0.85);

function point$3(that, x, y) {

 that._context.bezierCurveTo(
   that._x1 + that._k * (that._x2 - that._x0),
   that._y1 + that._k * (that._y2 - that._y0),
   that._x2 + that._k * (that._x1 - x),
   that._y2 + that._k * (that._y1 - y),
   that._x2,
   that._y2
 );

}

function Cardinal(context, tension) {

 this._context = context;
 this._k = (1 - tension) / 6;

}

Cardinal.prototype = {

 areaStart: function() {
   this._line = 0;
 },
 areaEnd: function() {
   this._line = NaN;
 },
 lineStart: function() {
   this._x0 = this._x1 = this._x2 =
   this._y0 = this._y1 = this._y2 = NaN;
   this._point = 0;
 },
 lineEnd: function() {
   switch (this._point) {
     case 2: this._context.lineTo(this._x2, this._y2); break;
     case 3: point$3(this, this._x1, this._y1); break;
   }
   if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
   this._line = 1 - this._line;
 },
 point: function(x, y) {
   x = +x, y = +y;
   switch (this._point) {
     case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
     case 1: this._point = 2; this._x1 = x, this._y1 = y; break;
     case 2: this._point = 3; // proceed
     default: point$3(this, x, y); break;
   }
   this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
   this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
 }

};

var cardinal = (function custom(tension) {

 function cardinal(context) {
   return new Cardinal(context, tension);
 }

 cardinal.tension = function(tension) {
   return custom(+tension);
 };

 return cardinal;

})(0);

function CardinalClosed(context, tension) {

 this._context = context;
 this._k = (1 - tension) / 6;

}

CardinalClosed.prototype = {

 areaStart: noop$2,
 areaEnd: noop$2,
 lineStart: function() {
   this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
   this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
   this._point = 0;
 },
 lineEnd: function() {
   switch (this._point) {
     case 1: {
       this._context.moveTo(this._x3, this._y3);
       this._context.closePath();
       break;
     }
     case 2: {
       this._context.lineTo(this._x3, this._y3);
       this._context.closePath();
       break;
     }
     case 3: {
       this.point(this._x3, this._y3);
       this.point(this._x4, this._y4);
       this.point(this._x5, this._y5);
       break;
     }
   }
 },
 point: function(x, y) {
   x = +x, y = +y;
   switch (this._point) {
     case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
     case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
     case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
     default: point$3(this, x, y); break;
   }
   this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
   this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
 }

};

var cardinalClosed = (function custom(tension) {

 function cardinal$$1(context) {
   return new CardinalClosed(context, tension);
 }

 cardinal$$1.tension = function(tension) {
   return custom(+tension);
 };

 return cardinal$$1;

})(0);

function CardinalOpen(context, tension) {

 this._context = context;
 this._k = (1 - tension) / 6;

}

CardinalOpen.prototype = {

 areaStart: function() {
   this._line = 0;
 },
 areaEnd: function() {
   this._line = NaN;
 },
 lineStart: function() {
   this._x0 = this._x1 = this._x2 =
   this._y0 = this._y1 = this._y2 = NaN;
   this._point = 0;
 },
 lineEnd: function() {
   if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
   this._line = 1 - this._line;
 },
 point: function(x, y) {
   x = +x, y = +y;
   switch (this._point) {
     case 0: this._point = 1; break;
     case 1: this._point = 2; break;
     case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
     case 3: this._point = 4; // proceed
     default: point$3(this, x, y); break;
   }
   this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
   this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
 }

};

var cardinalOpen = (function custom(tension) {

 function cardinal$$1(context) {
   return new CardinalOpen(context, tension);
 }

 cardinal$$1.tension = function(tension) {
   return custom(+tension);
 };

 return cardinal$$1;

})(0);

function point$4(that, x, y) {

 var x1 = that._x1,
     y1 = that._y1,
     x2 = that._x2,
     y2 = that._y2;

 if (that._l01_a > epsilon$3) {
   var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,
       n = 3 * that._l01_a * (that._l01_a + that._l12_a);
   x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;
   y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;
 }

 if (that._l23_a > epsilon$3) {
   var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,
       m = 3 * that._l23_a * (that._l23_a + that._l12_a);
   x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;
   y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;
 }

 that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);

}

function CatmullRom(context, alpha) {

 this._context = context;
 this._alpha = alpha;

}

CatmullRom.prototype = {

 areaStart: function() {
   this._line = 0;
 },
 areaEnd: function() {
   this._line = NaN;
 },
 lineStart: function() {
   this._x0 = this._x1 = this._x2 =
   this._y0 = this._y1 = this._y2 = NaN;
   this._l01_a = this._l12_a = this._l23_a =
   this._l01_2a = this._l12_2a = this._l23_2a =
   this._point = 0;
 },
 lineEnd: function() {
   switch (this._point) {
     case 2: this._context.lineTo(this._x2, this._y2); break;
     case 3: this.point(this._x2, this._y2); break;
   }
   if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
   this._line = 1 - this._line;
 },
 point: function(x, y) {
   x = +x, y = +y;

   if (this._point) {
     var x23 = this._x2 - x,
         y23 = this._y2 - y;
     this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
   }

   switch (this._point) {
     case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
     case 1: this._point = 2; break;
     case 2: this._point = 3; // proceed
     default: point$4(this, x, y); break;
   }

   this._l01_a = this._l12_a, this._l12_a = this._l23_a;
   this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
   this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
   this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
 }

};

var catmullRom = (function custom(alpha) {

 function catmullRom(context) {
   return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0);
 }

 catmullRom.alpha = function(alpha) {
   return custom(+alpha);
 };

 return catmullRom;

})(0.5);

function CatmullRomClosed(context, alpha) {

 this._context = context;
 this._alpha = alpha;

}

CatmullRomClosed.prototype = {

 areaStart: noop$2,
 areaEnd: noop$2,
 lineStart: function() {
   this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
   this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
   this._l01_a = this._l12_a = this._l23_a =
   this._l01_2a = this._l12_2a = this._l23_2a =
   this._point = 0;
 },
 lineEnd: function() {
   switch (this._point) {
     case 1: {
       this._context.moveTo(this._x3, this._y3);
       this._context.closePath();
       break;
     }
     case 2: {
       this._context.lineTo(this._x3, this._y3);
       this._context.closePath();
       break;
     }
     case 3: {
       this.point(this._x3, this._y3);
       this.point(this._x4, this._y4);
       this.point(this._x5, this._y5);
       break;
     }
   }
 },
 point: function(x, y) {
   x = +x, y = +y;

   if (this._point) {
     var x23 = this._x2 - x,
         y23 = this._y2 - y;
     this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
   }

   switch (this._point) {
     case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
     case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
     case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
     default: point$4(this, x, y); break;
   }

   this._l01_a = this._l12_a, this._l12_a = this._l23_a;
   this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
   this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
   this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
 }

};

var catmullRomClosed = (function custom(alpha) {

 function catmullRom$$1(context) {
   return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);
 }

 catmullRom$$1.alpha = function(alpha) {
   return custom(+alpha);
 };

 return catmullRom$$1;

})(0.5);

function CatmullRomOpen(context, alpha) {

 this._context = context;
 this._alpha = alpha;

}

CatmullRomOpen.prototype = {

 areaStart: function() {
   this._line = 0;
 },
 areaEnd: function() {
   this._line = NaN;
 },
 lineStart: function() {
   this._x0 = this._x1 = this._x2 =
   this._y0 = this._y1 = this._y2 = NaN;
   this._l01_a = this._l12_a = this._l23_a =
   this._l01_2a = this._l12_2a = this._l23_2a =
   this._point = 0;
 },
 lineEnd: function() {
   if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
   this._line = 1 - this._line;
 },
 point: function(x, y) {
   x = +x, y = +y;

   if (this._point) {
     var x23 = this._x2 - x,
         y23 = this._y2 - y;
     this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
   }

   switch (this._point) {
     case 0: this._point = 1; break;
     case 1: this._point = 2; break;
     case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
     case 3: this._point = 4; // proceed
     default: point$4(this, x, y); break;
   }

   this._l01_a = this._l12_a, this._l12_a = this._l23_a;
   this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
   this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
   this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
 }

};

var catmullRomOpen = (function custom(alpha) {

 function catmullRom$$1(context) {
   return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);
 }

 catmullRom$$1.alpha = function(alpha) {
   return custom(+alpha);
 };

 return catmullRom$$1;

})(0.5);

function LinearClosed(context) {

 this._context = context;

}

LinearClosed.prototype = {

 areaStart: noop$2,
 areaEnd: noop$2,
 lineStart: function() {
   this._point = 0;
 },
 lineEnd: function() {
   if (this._point) this._context.closePath();
 },
 point: function(x, y) {
   x = +x, y = +y;
   if (this._point) this._context.lineTo(x, y);
   else this._point = 1, this._context.moveTo(x, y);
 }

};

var linearClosed = function(context) {

 return new LinearClosed(context);

};

function sign$1(x) {

 return x < 0 ? -1 : 1;

}

// Calculate the slopes of the tangents (Hermite-type interpolation) based on // the following paper: Steffen, M. 1990. A Simple Method for Monotonic // Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO. // NOV(II), P. 443, 1990. function slope3(that, x2, y2) {

 var h0 = that._x1 - that._x0,
     h1 = x2 - that._x1,
     s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),
     s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),
     p = (s0 * h1 + s1 * h0) / (h0 + h1);
 return (sign$1(s0) + sign$1(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;

}

// Calculate a one-sided slope. function slope2(that, t) {

 var h = that._x1 - that._x0;
 return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;

}

// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations // "you can express cubic Hermite interpolation in terms of cubic Bézier curves // with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1". function point$5(that, t0, t1) {

 var x0 = that._x0,
     y0 = that._y0,
     x1 = that._x1,
     y1 = that._y1,
     dx = (x1 - x0) / 3;
 that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);

}

function MonotoneX(context) {

 this._context = context;

}

MonotoneX.prototype = {

 areaStart: function() {
   this._line = 0;
 },
 areaEnd: function() {
   this._line = NaN;
 },
 lineStart: function() {
   this._x0 = this._x1 =
   this._y0 = this._y1 =
   this._t0 = NaN;
   this._point = 0;
 },
 lineEnd: function() {
   switch (this._point) {
     case 2: this._context.lineTo(this._x1, this._y1); break;
     case 3: point$5(this, this._t0, slope2(this, this._t0)); break;
   }
   if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
   this._line = 1 - this._line;
 },
 point: function(x, y) {
   var t1 = NaN;

   x = +x, y = +y;
   if (x === this._x1 && y === this._y1) return; // Ignore coincident points.
   switch (this._point) {
     case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
     case 1: this._point = 2; break;
     case 2: this._point = 3; point$5(this, slope2(this, t1 = slope3(this, x, y)), t1); break;
     default: point$5(this, this._t0, t1 = slope3(this, x, y)); break;
   }

   this._x0 = this._x1, this._x1 = x;
   this._y0 = this._y1, this._y1 = y;
   this._t0 = t1;
 }

};

function MonotoneY(context) {

 this._context = new ReflectContext(context);

}

(MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) {

 MonotoneX.prototype.point.call(this, y, x);

};

function ReflectContext(context) {

 this._context = context;

}

ReflectContext.prototype = {

 moveTo: function(x, y) { this._context.moveTo(y, x); },
 closePath: function() { this._context.closePath(); },
 lineTo: function(x, y) { this._context.lineTo(y, x); },
 bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); }

};

function monotoneX(context) {

 return new MonotoneX(context);

}

function monotoneY(context) {

 return new MonotoneY(context);

}

function Natural(context) {

 this._context = context;

}

Natural.prototype = {

 areaStart: function() {
   this._line = 0;
 },
 areaEnd: function() {
   this._line = NaN;
 },
 lineStart: function() {
   this._x = [];
   this._y = [];
 },
 lineEnd: function() {
   var x = this._x,
       y = this._y,
       n = x.length;

   if (n) {
     this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);
     if (n === 2) {
       this._context.lineTo(x[1], y[1]);
     } else {
       var px = controlPoints(x),
           py = controlPoints(y);
       for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {
         this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);
       }
     }
   }

   if (this._line || (this._line !== 0 && n === 1)) this._context.closePath();
   this._line = 1 - this._line;
   this._x = this._y = null;
 },
 point: function(x, y) {
   this._x.push(+x);
   this._y.push(+y);
 }

};

// See https://www.particleincell.com/2012/bezier-splines/ for derivation. function controlPoints(x) {

 var i,
     n = x.length - 1,
     m,
     a = new Array(n),
     b = new Array(n),
     r = new Array(n);
 a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];
 for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];
 a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];
 for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];
 a[n - 1] = r[n - 1] / b[n - 1];
 for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];
 b[n - 1] = (x[n] + a[n - 1]) / 2;
 for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];
 return [a, b];

}

var natural = function(context) {

 return new Natural(context);

};

function Step(context, t) {

 this._context = context;
 this._t = t;

}

Step.prototype = {

 areaStart: function() {
   this._line = 0;
 },
 areaEnd: function() {
   this._line = NaN;
 },
 lineStart: function() {
   this._x = this._y = NaN;
   this._point = 0;
 },
 lineEnd: function() {
   if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);
   if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
   if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;
 },
 point: function(x, y) {
   x = +x, y = +y;
   switch (this._point) {
     case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
     case 1: this._point = 2; // proceed
     default: {
       if (this._t <= 0) {
         this._context.lineTo(this._x, y);
         this._context.lineTo(x, y);
       } else {
         var x1 = this._x * (1 - this._t) + x * this._t;
         this._context.lineTo(x1, this._y);
         this._context.lineTo(x1, y);
       }
       break;
     }
   }
   this._x = x, this._y = y;
 }

};

var step = function(context) {

 return new Step(context, 0.5);

};

function stepBefore(context) {

 return new Step(context, 0);

}

function stepAfter(context) {

 return new Step(context, 1);

}

var none$1 = function(series, order) {

 if (!((n = series.length) > 1)) return;
 for (var i = 1, j, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {
   s0 = s1, s1 = series[order[i]];
   for (j = 0; j < m; ++j) {
     s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];
   }
 }

};

var none$2 = function(series) {

 var n = series.length, o = new Array(n);
 while (--n >= 0) o[n] = n;
 return o;

};

function stackValue(d, key) {

 return d[key];

}

var stack = function() {

 var keys = constant$10([]),
     order = none$2,
     offset = none$1,
     value = stackValue;

 function stack(data) {
   var kz = keys.apply(this, arguments),
       i,
       m = data.length,
       n = kz.length,
       sz = new Array(n),
       oz;

   for (i = 0; i < n; ++i) {
     for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) {
       si[j] = sij = [0, +value(data[j], ki, j, data)];
       sij.data = data[j];
     }
     si.key = ki;
   }

   for (i = 0, oz = order(sz); i < n; ++i) {
     sz[oz[i]].index = i;
   }

   offset(sz, oz);
   return sz;
 }

 stack.keys = function(_) {
   return arguments.length ? (keys = typeof _ === "function" ? _ : constant$10(slice$6.call(_)), stack) : keys;
 };

 stack.value = function(_) {
   return arguments.length ? (value = typeof _ === "function" ? _ : constant$10(+_), stack) : value;
 };

 stack.order = function(_) {
   return arguments.length ? (order = _ == null ? none$2 : typeof _ === "function" ? _ : constant$10(slice$6.call(_)), stack) : order;
 };

 stack.offset = function(_) {
   return arguments.length ? (offset = _ == null ? none$1 : _, stack) : offset;
 };

 return stack;

};

var expand = function(series, order) {

 if (!((n = series.length) > 0)) return;
 for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {
   for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;
   if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y;
 }
 none$1(series, order);

};

var diverging = function(series, order) {

 if (!((n = series.length) > 1)) return;
 for (var i, j = 0, d, dy, yp, yn, n, m = series[order[0]].length; j < m; ++j) {
   for (yp = yn = 0, i = 0; i < n; ++i) {
     if ((dy = (d = series[order[i]][j])[1] - d[0]) >= 0) {
       d[0] = yp, d[1] = yp += dy;
     } else if (dy < 0) {
       d[1] = yn, d[0] = yn += dy;
     } else {
       d[0] = yp;
     }
   }
 }

};

var silhouette = function(series, order) {

 if (!((n = series.length) > 0)) return;
 for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {
   for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;
   s0[j][1] += s0[j][0] = -y / 2;
 }
 none$1(series, order);

};

var wiggle = function(series, order) {

 if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;
 for (var y = 0, j = 1, s0, m, n; j < m; ++j) {
   for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {
     var si = series[order[i]],
         sij0 = si[j][1] || 0,
         sij1 = si[j - 1][1] || 0,
         s3 = (sij0 - sij1) / 2;
     for (var k = 0; k < i; ++k) {
       var sk = series[order[k]],
           skj0 = sk[j][1] || 0,
           skj1 = sk[j - 1][1] || 0;
       s3 += skj0 - skj1;
     }
     s1 += sij0, s2 += s3 * sij0;
   }
   s0[j - 1][1] += s0[j - 1][0] = y;
   if (s1) y -= s2 / s1;
 }
 s0[j - 1][1] += s0[j - 1][0] = y;
 none$1(series, order);

};

var ascending$2 = function(series) {

 var sums = series.map(sum$2);
 return none$2(series).sort(function(a, b) { return sums[a] - sums[b]; });

};

function sum$2(series) {

 var s = 0, i = -1, n = series.length, v;
 while (++i < n) if (v = +series[i][1]) s += v;
 return s;

}

var descending$2 = function(series) {

 return ascending$2(series).reverse();

};

var insideOut = function(series) {

 var n = series.length,
     i,
     j,
     sums = series.map(sum$2),
     order = none$2(series).sort(function(a, b) { return sums[b] - sums[a]; }),
     top = 0,
     bottom = 0,
     tops = [],
     bottoms = [];

 for (i = 0; i < n; ++i) {
   j = order[i];
   if (top < bottom) {
     top += sums[j];
     tops.push(j);
   } else {
     bottom += sums[j];
     bottoms.push(j);
   }
 }

 return bottoms.reverse().concat(tops);

};

var reverse = function(series) {

 return none$2(series).reverse();

};

var constant$11 = function(x) {

 return function() {
   return x;
 };

};

function x$4(d) {

 return d[0];

}

function y$4(d) {

 return d[1];

}

function RedBlackTree() {

 this._ = null; // root node

}

function RedBlackNode(node) {

 node.U = // parent node
 node.C = // color - true for red, false for black
 node.L = // left node
 node.R = // right node
 node.P = // previous node
 node.N = null; // next node

}

RedBlackTree.prototype = {

 constructor: RedBlackTree,

 insert: function(after, node) {
   var parent, grandpa, uncle;

   if (after) {
     node.P = after;
     node.N = after.N;
     if (after.N) after.N.P = node;
     after.N = node;
     if (after.R) {
       after = after.R;
       while (after.L) after = after.L;
       after.L = node;
     } else {
       after.R = node;
     }
     parent = after;
   } else if (this._) {
     after = RedBlackFirst(this._);
     node.P = null;
     node.N = after;
     after.P = after.L = node;
     parent = after;
   } else {
     node.P = node.N = null;
     this._ = node;
     parent = null;
   }
   node.L = node.R = null;
   node.U = parent;
   node.C = true;

   after = node;
   while (parent && parent.C) {
     grandpa = parent.U;
     if (parent === grandpa.L) {
       uncle = grandpa.R;
       if (uncle && uncle.C) {
         parent.C = uncle.C = false;
         grandpa.C = true;
         after = grandpa;
       } else {
         if (after === parent.R) {
           RedBlackRotateLeft(this, parent);
           after = parent;
           parent = after.U;
         }
         parent.C = false;
         grandpa.C = true;
         RedBlackRotateRight(this, grandpa);
       }
     } else {
       uncle = grandpa.L;
       if (uncle && uncle.C) {
         parent.C = uncle.C = false;
         grandpa.C = true;
         after = grandpa;
       } else {
         if (after === parent.L) {
           RedBlackRotateRight(this, parent);
           after = parent;
           parent = after.U;
         }
         parent.C = false;
         grandpa.C = true;
         RedBlackRotateLeft(this, grandpa);
       }
     }
     parent = after.U;
   }
   this._.C = false;
 },

 remove: function(node) {
   if (node.N) node.N.P = node.P;
   if (node.P) node.P.N = node.N;
   node.N = node.P = null;

   var parent = node.U,
       sibling,
       left = node.L,
       right = node.R,
       next,
       red;

   if (!left) next = right;
   else if (!right) next = left;
   else next = RedBlackFirst(right);

   if (parent) {
     if (parent.L === node) parent.L = next;
     else parent.R = next;
   } else {
     this._ = next;
   }

   if (left && right) {
     red = next.C;
     next.C = node.C;
     next.L = left;
     left.U = next;
     if (next !== right) {
       parent = next.U;
       next.U = node.U;
       node = next.R;
       parent.L = node;
       next.R = right;
       right.U = next;
     } else {
       next.U = parent;
       parent = next;
       node = next.R;
     }
   } else {
     red = node.C;
     node = next;
   }

   if (node) node.U = parent;
   if (red) return;
   if (node && node.C) { node.C = false; return; }

   do {
     if (node === this._) break;
     if (node === parent.L) {
       sibling = parent.R;
       if (sibling.C) {
         sibling.C = false;
         parent.C = true;
         RedBlackRotateLeft(this, parent);
         sibling = parent.R;
       }
       if ((sibling.L && sibling.L.C)
           || (sibling.R && sibling.R.C)) {
         if (!sibling.R || !sibling.R.C) {
           sibling.L.C = false;
           sibling.C = true;
           RedBlackRotateRight(this, sibling);
           sibling = parent.R;
         }
         sibling.C = parent.C;
         parent.C = sibling.R.C = false;
         RedBlackRotateLeft(this, parent);
         node = this._;
         break;
       }
     } else {
       sibling = parent.L;
       if (sibling.C) {
         sibling.C = false;
         parent.C = true;
         RedBlackRotateRight(this, parent);
         sibling = parent.L;
       }
       if ((sibling.L && sibling.L.C)
         || (sibling.R && sibling.R.C)) {
         if (!sibling.L || !sibling.L.C) {
           sibling.R.C = false;
           sibling.C = true;
           RedBlackRotateLeft(this, sibling);
           sibling = parent.L;
         }
         sibling.C = parent.C;
         parent.C = sibling.L.C = false;
         RedBlackRotateRight(this, parent);
         node = this._;
         break;
       }
     }
     sibling.C = true;
     node = parent;
     parent = parent.U;
   } while (!node.C);

   if (node) node.C = false;
 }

};

function RedBlackRotateLeft(tree, node) {

 var p = node,
     q = node.R,
     parent = p.U;

 if (parent) {
   if (parent.L === p) parent.L = q;
   else parent.R = q;
 } else {
   tree._ = q;
 }

 q.U = parent;
 p.U = q;
 p.R = q.L;
 if (p.R) p.R.U = p;
 q.L = p;

}

function RedBlackRotateRight(tree, node) {

 var p = node,
     q = node.L,
     parent = p.U;

 if (parent) {
   if (parent.L === p) parent.L = q;
   else parent.R = q;
 } else {
   tree._ = q;
 }

 q.U = parent;
 p.U = q;
 p.L = q.R;
 if (p.L) p.L.U = p;
 q.R = p;

}

function RedBlackFirst(node) {

 while (node.L) node = node.L;
 return node;

}

function createEdge(left, right, v0, v1) {

 var edge = [null, null],
     index = edges.push(edge) - 1;
 edge.left = left;
 edge.right = right;
 if (v0) setEdgeEnd(edge, left, right, v0);
 if (v1) setEdgeEnd(edge, right, left, v1);
 cells[left.index].halfedges.push(index);
 cells[right.index].halfedges.push(index);
 return edge;

}

function createBorderEdge(left, v0, v1) {

 var edge = [v0, v1];
 edge.left = left;
 return edge;

}

function setEdgeEnd(edge, left, right, vertex) {

 if (!edge[0] && !edge[1]) {
   edge[0] = vertex;
   edge.left = left;
   edge.right = right;
 } else if (edge.left === right) {
   edge[1] = vertex;
 } else {
   edge[0] = vertex;
 }

}

// Liang–Barsky line clipping. function clipEdge(edge, x0, y0, x1, y1) {

 var a = edge[0],
     b = edge[1],
     ax = a[0],
     ay = a[1],
     bx = b[0],
     by = b[1],
     t0 = 0,
     t1 = 1,
     dx = bx - ax,
     dy = by - ay,
     r;

 r = x0 - ax;
 if (!dx && r > 0) return;
 r /= dx;
 if (dx < 0) {
   if (r < t0) return;
   if (r < t1) t1 = r;
 } else if (dx > 0) {
   if (r > t1) return;
   if (r > t0) t0 = r;
 }

 r = x1 - ax;
 if (!dx && r < 0) return;
 r /= dx;
 if (dx < 0) {
   if (r > t1) return;
   if (r > t0) t0 = r;
 } else if (dx > 0) {
   if (r < t0) return;
   if (r < t1) t1 = r;
 }

 r = y0 - ay;
 if (!dy && r > 0) return;
 r /= dy;
 if (dy < 0) {
   if (r < t0) return;
   if (r < t1) t1 = r;
 } else if (dy > 0) {
   if (r > t1) return;
   if (r > t0) t0 = r;
 }

 r = y1 - ay;
 if (!dy && r < 0) return;
 r /= dy;
 if (dy < 0) {
   if (r > t1) return;
   if (r > t0) t0 = r;
 } else if (dy > 0) {
   if (r < t0) return;
   if (r < t1) t1 = r;
 }

 if (!(t0 > 0) && !(t1 < 1)) return true; // TODO Better check?

 if (t0 > 0) edge[0] = [ax + t0 * dx, ay + t0 * dy];
 if (t1 < 1) edge[1] = [ax + t1 * dx, ay + t1 * dy];
 return true;

}

function connectEdge(edge, x0, y0, x1, y1) {

 var v1 = edge[1];
 if (v1) return true;

 var v0 = edge[0],
     left = edge.left,
     right = edge.right,
     lx = left[0],
     ly = left[1],
     rx = right[0],
     ry = right[1],
     fx = (lx + rx) / 2,
     fy = (ly + ry) / 2,
     fm,
     fb;

 if (ry === ly) {
   if (fx < x0 || fx >= x1) return;
   if (lx > rx) {
     if (!v0) v0 = [fx, y0];
     else if (v0[1] >= y1) return;
     v1 = [fx, y1];
   } else {
     if (!v0) v0 = [fx, y1];
     else if (v0[1] < y0) return;
     v1 = [fx, y0];
   }
 } else {
   fm = (lx - rx) / (ry - ly);
   fb = fy - fm * fx;
   if (fm < -1 || fm > 1) {
     if (lx > rx) {
       if (!v0) v0 = [(y0 - fb) / fm, y0];
       else if (v0[1] >= y1) return;
       v1 = [(y1 - fb) / fm, y1];
     } else {
       if (!v0) v0 = [(y1 - fb) / fm, y1];
       else if (v0[1] < y0) return;
       v1 = [(y0 - fb) / fm, y0];
     }
   } else {
     if (ly < ry) {
       if (!v0) v0 = [x0, fm * x0 + fb];
       else if (v0[0] >= x1) return;
       v1 = [x1, fm * x1 + fb];
     } else {
       if (!v0) v0 = [x1, fm * x1 + fb];
       else if (v0[0] < x0) return;
       v1 = [x0, fm * x0 + fb];
     }
   }
 }

 edge[0] = v0;
 edge[1] = v1;
 return true;

}

function clipEdges(x0, y0, x1, y1) {

 var i = edges.length,
     edge;

 while (i--) {
   if (!connectEdge(edge = edges[i], x0, y0, x1, y1)
       || !clipEdge(edge, x0, y0, x1, y1)
       || !(Math.abs(edge[0][0] - edge[1][0]) > epsilon$4
           || Math.abs(edge[0][1] - edge[1][1]) > epsilon$4)) {
     delete edges[i];
   }
 }

}

function createCell(site) {

 return cells[site.index] = {
   site: site,
   halfedges: []
 };

}

function cellHalfedgeAngle(cell, edge) {

 var site = cell.site,
     va = edge.left,
     vb = edge.right;
 if (site === vb) vb = va, va = site;
 if (vb) return Math.atan2(vb[1] - va[1], vb[0] - va[0]);
 if (site === va) va = edge[1], vb = edge[0];
 else va = edge[0], vb = edge[1];
 return Math.atan2(va[0] - vb[0], vb[1] - va[1]);

}

function cellHalfedgeStart(cell, edge) {

 return edge[+(edge.left !== cell.site)];

}

function cellHalfedgeEnd(cell, edge) {

 return edge[+(edge.left === cell.site)];

}

function sortCellHalfedges() {

 for (var i = 0, n = cells.length, cell, halfedges, j, m; i < n; ++i) {
   if ((cell = cells[i]) && (m = (halfedges = cell.halfedges).length)) {
     var index = new Array(m),
         array = new Array(m);
     for (j = 0; j < m; ++j) index[j] = j, array[j] = cellHalfedgeAngle(cell, edges[halfedges[j]]);
     index.sort(function(i, j) { return array[j] - array[i]; });
     for (j = 0; j < m; ++j) array[j] = halfedges[index[j]];
     for (j = 0; j < m; ++j) halfedges[j] = array[j];
   }
 }

}

function clipCells(x0, y0, x1, y1) {

 var nCells = cells.length,
     iCell,
     cell,
     site,
     iHalfedge,
     halfedges,
     nHalfedges,
     start,
     startX,
     startY,
     end,
     endX,
     endY,
     cover = true;

 for (iCell = 0; iCell < nCells; ++iCell) {
   if (cell = cells[iCell]) {
     site = cell.site;
     halfedges = cell.halfedges;
     iHalfedge = halfedges.length;

     // Remove any dangling clipped edges.
     while (iHalfedge--) {
       if (!edges[halfedges[iHalfedge]]) {
         halfedges.splice(iHalfedge, 1);
       }
     }

     // Insert any border edges as necessary.
     iHalfedge = 0, nHalfedges = halfedges.length;
     while (iHalfedge < nHalfedges) {
       end = cellHalfedgeEnd(cell, edges[halfedges[iHalfedge]]), endX = end[0], endY = end[1];
       start = cellHalfedgeStart(cell, edges[halfedges[++iHalfedge % nHalfedges]]), startX = start[0], startY = start[1];
       if (Math.abs(endX - startX) > epsilon$4 || Math.abs(endY - startY) > epsilon$4) {
         halfedges.splice(iHalfedge, 0, edges.push(createBorderEdge(site, end,
             Math.abs(endX - x0) < epsilon$4 && y1 - endY > epsilon$4 ? [x0, Math.abs(startX - x0) < epsilon$4 ? startY : y1]
             : Math.abs(endY - y1) < epsilon$4 && x1 - endX > epsilon$4 ? [Math.abs(startY - y1) < epsilon$4 ? startX : x1, y1]
             : Math.abs(endX - x1) < epsilon$4 && endY - y0 > epsilon$4 ? [x1, Math.abs(startX - x1) < epsilon$4 ? startY : y0]
             : Math.abs(endY - y0) < epsilon$4 && endX - x0 > epsilon$4 ? [Math.abs(startY - y0) < epsilon$4 ? startX : x0, y0]
             : null)) - 1);
         ++nHalfedges;
       }
     }

     if (nHalfedges) cover = false;
   }
 }

 // If there weren’t any edges, have the closest site cover the extent.
 // It doesn’t matter which corner of the extent we measure!
 if (cover) {
   var dx, dy, d2, dc = Infinity;

   for (iCell = 0, cover = null; iCell < nCells; ++iCell) {
     if (cell = cells[iCell]) {
       site = cell.site;
       dx = site[0] - x0;
       dy = site[1] - y0;
       d2 = dx * dx + dy * dy;
       if (d2 < dc) dc = d2, cover = cell;
     }
   }

   if (cover) {
     var v00 = [x0, y0], v01 = [x0, y1], v11 = [x1, y1], v10 = [x1, y0];
     cover.halfedges.push(
       edges.push(createBorderEdge(site = cover.site, v00, v01)) - 1,
       edges.push(createBorderEdge(site, v01, v11)) - 1,
       edges.push(createBorderEdge(site, v11, v10)) - 1,
       edges.push(createBorderEdge(site, v10, v00)) - 1
     );
   }
 }

 // Lastly delete any cells with no edges; these were entirely clipped.
 for (iCell = 0; iCell < nCells; ++iCell) {
   if (cell = cells[iCell]) {
     if (!cell.halfedges.length) {
       delete cells[iCell];
     }
   }
 }

}

var circlePool = [];

var firstCircle;

function Circle() {

 RedBlackNode(this);
 this.x =
 this.y =
 this.arc =
 this.site =
 this.cy = null;

}

function attachCircle(arc) {

 var lArc = arc.P,
     rArc = arc.N;

 if (!lArc || !rArc) return;

 var lSite = lArc.site,
     cSite = arc.site,
     rSite = rArc.site;

 if (lSite === rSite) return;

 var bx = cSite[0],
     by = cSite[1],
     ax = lSite[0] - bx,
     ay = lSite[1] - by,
     cx = rSite[0] - bx,
     cy = rSite[1] - by;

 var d = 2 * (ax * cy - ay * cx);
 if (d >= -epsilon2$2) return;

 var ha = ax * ax + ay * ay,
     hc = cx * cx + cy * cy,
     x = (cy * ha - ay * hc) / d,
     y = (ax * hc - cx * ha) / d;

 var circle = circlePool.pop() || new Circle;
 circle.arc = arc;
 circle.site = cSite;
 circle.x = x + bx;
 circle.y = (circle.cy = y + by) + Math.sqrt(x * x + y * y); // y bottom

 arc.circle = circle;

 var before = null,
     node = circles._;

 while (node) {
   if (circle.y < node.y || (circle.y === node.y && circle.x <= node.x)) {
     if (node.L) node = node.L;
     else { before = node.P; break; }
   } else {
     if (node.R) node = node.R;
     else { before = node; break; }
   }
 }

 circles.insert(before, circle);
 if (!before) firstCircle = circle;

}

function detachCircle(arc) {

 var circle = arc.circle;
 if (circle) {
   if (!circle.P) firstCircle = circle.N;
   circles.remove(circle);
   circlePool.push(circle);
   RedBlackNode(circle);
   arc.circle = null;
 }

}

var beachPool = [];

function Beach() {

 RedBlackNode(this);
 this.edge =
 this.site =
 this.circle = null;

}

function createBeach(site) {

 var beach = beachPool.pop() || new Beach;
 beach.site = site;
 return beach;

}

function detachBeach(beach) {

 detachCircle(beach);
 beaches.remove(beach);
 beachPool.push(beach);
 RedBlackNode(beach);

}

function removeBeach(beach) {

 var circle = beach.circle,
     x = circle.x,
     y = circle.cy,
     vertex = [x, y],
     previous = beach.P,
     next = beach.N,
     disappearing = [beach];

 detachBeach(beach);

 var lArc = previous;
 while (lArc.circle
     && Math.abs(x - lArc.circle.x) < epsilon$4
     && Math.abs(y - lArc.circle.cy) < epsilon$4) {
   previous = lArc.P;
   disappearing.unshift(lArc);
   detachBeach(lArc);
   lArc = previous;
 }

 disappearing.unshift(lArc);
 detachCircle(lArc);

 var rArc = next;
 while (rArc.circle
     && Math.abs(x - rArc.circle.x) < epsilon$4
     && Math.abs(y - rArc.circle.cy) < epsilon$4) {
   next = rArc.N;
   disappearing.push(rArc);
   detachBeach(rArc);
   rArc = next;
 }

 disappearing.push(rArc);
 detachCircle(rArc);

 var nArcs = disappearing.length,
     iArc;
 for (iArc = 1; iArc < nArcs; ++iArc) {
   rArc = disappearing[iArc];
   lArc = disappearing[iArc - 1];
   setEdgeEnd(rArc.edge, lArc.site, rArc.site, vertex);
 }

 lArc = disappearing[0];
 rArc = disappearing[nArcs - 1];
 rArc.edge = createEdge(lArc.site, rArc.site, null, vertex);

 attachCircle(lArc);
 attachCircle(rArc);

}

function addBeach(site) {

 var x = site[0],
     directrix = site[1],
     lArc,
     rArc,
     dxl,
     dxr,
     node = beaches._;

 while (node) {
   dxl = leftBreakPoint(node, directrix) - x;
   if (dxl > epsilon$4) node = node.L; else {
     dxr = x - rightBreakPoint(node, directrix);
     if (dxr > epsilon$4) {
       if (!node.R) {
         lArc = node;
         break;
       }
       node = node.R;
     } else {
       if (dxl > -epsilon$4) {
         lArc = node.P;
         rArc = node;
       } else if (dxr > -epsilon$4) {
         lArc = node;
         rArc = node.N;
       } else {
         lArc = rArc = node;
       }
       break;
     }
   }
 }

 createCell(site);
 var newArc = createBeach(site);
 beaches.insert(lArc, newArc);

 if (!lArc && !rArc) return;

 if (lArc === rArc) {
   detachCircle(lArc);
   rArc = createBeach(lArc.site);
   beaches.insert(newArc, rArc);
   newArc.edge = rArc.edge = createEdge(lArc.site, newArc.site);
   attachCircle(lArc);
   attachCircle(rArc);
   return;
 }

 if (!rArc) { // && lArc
   newArc.edge = createEdge(lArc.site, newArc.site);
   return;
 }

 // else lArc !== rArc
 detachCircle(lArc);
 detachCircle(rArc);

 var lSite = lArc.site,
     ax = lSite[0],
     ay = lSite[1],
     bx = site[0] - ax,
     by = site[1] - ay,
     rSite = rArc.site,
     cx = rSite[0] - ax,
     cy = rSite[1] - ay,
     d = 2 * (bx * cy - by * cx),
     hb = bx * bx + by * by,
     hc = cx * cx + cy * cy,
     vertex = [(cy * hb - by * hc) / d + ax, (bx * hc - cx * hb) / d + ay];

 setEdgeEnd(rArc.edge, lSite, rSite, vertex);
 newArc.edge = createEdge(lSite, site, null, vertex);
 rArc.edge = createEdge(site, rSite, null, vertex);
 attachCircle(lArc);
 attachCircle(rArc);

}

function leftBreakPoint(arc, directrix) {

 var site = arc.site,
     rfocx = site[0],
     rfocy = site[1],
     pby2 = rfocy - directrix;

 if (!pby2) return rfocx;

 var lArc = arc.P;
 if (!lArc) return -Infinity;

 site = lArc.site;
 var lfocx = site[0],
     lfocy = site[1],
     plby2 = lfocy - directrix;

 if (!plby2) return lfocx;

 var hl = lfocx - rfocx,
     aby2 = 1 / pby2 - 1 / plby2,
     b = hl / plby2;

 if (aby2) return (-b + Math.sqrt(b * b - 2 * aby2 * (hl * hl / (-2 * plby2) - lfocy + plby2 / 2 + rfocy - pby2 / 2))) / aby2 + rfocx;

 return (rfocx + lfocx) / 2;

}

function rightBreakPoint(arc, directrix) {

 var rArc = arc.N;
 if (rArc) return leftBreakPoint(rArc, directrix);
 var site = arc.site;
 return site[1] === directrix ? site[0] : Infinity;

}

var epsilon$4 = 1e-6; var epsilon2$2 = 1e-12; var beaches; var cells; var circles; var edges;

function triangleArea(a, b, c) {

 return (a[0] - c[0]) * (b[1] - a[1]) - (a[0] - b[0]) * (c[1] - a[1]);

}

function lexicographic(a, b) {

 return b[1] - a[1]
     || b[0] - a[0];

}

function Diagram(sites, extent) {

 var site = sites.sort(lexicographic).pop(),
     x,
     y,
     circle;

 edges = [];
 cells = new Array(sites.length);
 beaches = new RedBlackTree;
 circles = new RedBlackTree;

 while (true) {
   circle = firstCircle;
   if (site && (!circle || site[1] < circle.y || (site[1] === circle.y && site[0] < circle.x))) {
     if (site[0] !== x || site[1] !== y) {
       addBeach(site);
       x = site[0], y = site[1];
     }
     site = sites.pop();
   } else if (circle) {
     removeBeach(circle.arc);
   } else {
     break;
   }
 }

 sortCellHalfedges();

 if (extent) {
   var x0 = +extent[0][0],
       y0 = +extent[0][1],
       x1 = +extent[1][0],
       y1 = +extent[1][1];
   clipEdges(x0, y0, x1, y1);
   clipCells(x0, y0, x1, y1);
 }

 this.edges = edges;
 this.cells = cells;

 beaches =
 circles =
 edges =
 cells = null;

}

Diagram.prototype = {

 constructor: Diagram,

 polygons: function() {
   var edges = this.edges;

   return this.cells.map(function(cell) {
     var polygon = cell.halfedges.map(function(i) { return cellHalfedgeStart(cell, edges[i]); });
     polygon.data = cell.site.data;
     return polygon;
   });
 },

 triangles: function() {
   var triangles = [],
       edges = this.edges;

   this.cells.forEach(function(cell, i) {
     if (!(m = (halfedges = cell.halfedges).length)) return;
     var site = cell.site,
         halfedges,
         j = -1,
         m,
         s0,
         e1 = edges[halfedges[m - 1]],
         s1 = e1.left === site ? e1.right : e1.left;

     while (++j < m) {
       s0 = s1;
       e1 = edges[halfedges[j]];
       s1 = e1.left === site ? e1.right : e1.left;
       if (s0 && s1 && i < s0.index && i < s1.index && triangleArea(site, s0, s1) < 0) {
         triangles.push([site.data, s0.data, s1.data]);
       }
     }
   });

   return triangles;
 },

 links: function() {
   return this.edges.filter(function(edge) {
     return edge.right;
   }).map(function(edge) {
     return {
       source: edge.left.data,
       target: edge.right.data
     };
   });
 },

 find: function(x, y, radius) {
   var that = this, i0, i1 = that._found || 0, n = that.cells.length, cell;

   // Use the previously-found cell, or start with an arbitrary one.
   while (!(cell = that.cells[i1])) if (++i1 >= n) return null;
   var dx = x - cell.site[0], dy = y - cell.site[1], d2 = dx * dx + dy * dy;

   // Traverse the half-edges to find a closer cell, if any.
   do {
     cell = that.cells[i0 = i1], i1 = null;
     cell.halfedges.forEach(function(e) {
       var edge = that.edges[e], v = edge.left;
       if ((v === cell.site || !v) && !(v = edge.right)) return;
       var vx = x - v[0], vy = y - v[1], v2 = vx * vx + vy * vy;
       if (v2 < d2) d2 = v2, i1 = v.index;
     });
   } while (i1 !== null);

   that._found = i0;

   return radius == null || d2 <= radius * radius ? cell.site : null;
 }

};

var voronoi = function() {

 var x$$1 = x$4,
     y$$1 = y$4,
     extent = null;

 function voronoi(data) {
   return new Diagram(data.map(function(d, i) {
     var s = [Math.round(x$$1(d, i, data) / epsilon$4) * epsilon$4, Math.round(y$$1(d, i, data) / epsilon$4) * epsilon$4];
     s.index = i;
     s.data = d;
     return s;
   }), extent);
 }

 voronoi.polygons = function(data) {
   return voronoi(data).polygons();
 };

 voronoi.links = function(data) {
   return voronoi(data).links();
 };

 voronoi.triangles = function(data) {
   return voronoi(data).triangles();
 };

 voronoi.x = function(_) {
   return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$11(+_), voronoi) : x$$1;
 };

 voronoi.y = function(_) {
   return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$11(+_), voronoi) : y$$1;
 };

 voronoi.extent = function(_) {
   return arguments.length ? (extent = _ == null ? null : [[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]], voronoi) : extent && [[extent[0][0], extent[0][1]], [extent[1][0], extent[1][1]]];
 };

 voronoi.size = function(_) {
   return arguments.length ? (extent = _ == null ? null : [[0, 0], [+_[0], +_[1]]], voronoi) : extent && [extent[1][0] - extent[0][0], extent[1][1] - extent[0][1]];
 };

 return voronoi;

};

var constant$12 = function(x) {

 return function() {
   return x;
 };

};

function ZoomEvent(target, type, transform) {

 this.target = target;
 this.type = type;
 this.transform = transform;

}

function Transform(k, x, y) {

 this.k = k;
 this.x = x;
 this.y = y;

}

Transform.prototype = {

 constructor: Transform,
 scale: function(k) {
   return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
 },
 translate: function(x, y) {
   return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
 },
 apply: function(point) {
   return [point[0] * this.k + this.x, point[1] * this.k + this.y];
 },
 applyX: function(x) {
   return x * this.k + this.x;
 },
 applyY: function(y) {
   return y * this.k + this.y;
 },
 invert: function(location) {
   return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
 },
 invertX: function(x) {
   return (x - this.x) / this.k;
 },
 invertY: function(y) {
   return (y - this.y) / this.k;
 },
 rescaleX: function(x) {
   return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
 },
 rescaleY: function(y) {
   return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
 },
 toString: function() {
   return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
 }

};

var identity$8 = new Transform(1, 0, 0);

transform$1.prototype = Transform.prototype;

function transform$1(node) {

 return node.__zoom || identity$8;

}

function nopropagation$2() {

 exports.event.stopImmediatePropagation();

}

var noevent$2 = function() {

 exports.event.preventDefault();
 exports.event.stopImmediatePropagation();

};

// Ignore right-click, since that should open the context menu. function defaultFilter$2() {

 return !exports.event.button;

}

function defaultExtent$1() {

 var e = this, w, h;
 if (e instanceof SVGElement) {
   e = e.ownerSVGElement || e;
   w = e.width.baseVal.value;
   h = e.height.baseVal.value;
 } else {
   w = e.clientWidth;
   h = e.clientHeight;
 }
 return [[0, 0], [w, h]];

}

function defaultTransform() {

 return this.__zoom || identity$8;

}

function defaultWheelDelta() {

 return -exports.event.deltaY * (exports.event.deltaMode ? 120 : 1) / 500;

}

function defaultTouchable$1() {

 return "ontouchstart" in this;

}

var zoom = function() {

 var filter = defaultFilter$2,
     extent = defaultExtent$1,
     wheelDelta = defaultWheelDelta,
     touchable = defaultTouchable$1,
     k0 = 0,
     k1 = Infinity,
     x0 = -k1,
     x1 = k1,
     y0 = x0,
     y1 = x1,
     duration = 250,
     interpolate = interpolateZoom,
     gestures = [],
     listeners = dispatch("start", "zoom", "end"),
     touchstarting,
     touchending,
     touchDelay = 500,
     wheelDelay = 150,
     clickDistance2 = 0;

 function zoom(selection) {
   selection
       .property("__zoom", defaultTransform)
       .on("wheel.zoom", wheeled)
       .on("mousedown.zoom", mousedowned)
       .on("dblclick.zoom", dblclicked)
     .filter(touchable)
       .on("touchstart.zoom", touchstarted)
       .on("touchmove.zoom", touchmoved)
       .on("touchend.zoom touchcancel.zoom", touchended)
       .style("touch-action", "none")
       .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
 }

 zoom.transform = function(collection, transform$$1) {
   var selection = collection.selection ? collection.selection() : collection;
   selection.property("__zoom", defaultTransform);
   if (collection !== selection) {
     schedule(collection, transform$$1);
   } else {
     selection.interrupt().each(function() {
       gesture(this, arguments)
           .start()
           .zoom(null, typeof transform$$1 === "function" ? transform$$1.apply(this, arguments) : transform$$1)
           .end();
     });
   }
 };

 zoom.scaleBy = function(selection, k) {
   zoom.scaleTo(selection, function() {
     var k0 = this.__zoom.k,
         k1 = typeof k === "function" ? k.apply(this, arguments) : k;
     return k0 * k1;
   });
 };

 zoom.scaleTo = function(selection, k) {
   zoom.transform(selection, function() {
     var e = extent.apply(this, arguments),
         t0 = this.__zoom,
         p0 = centroid(e),
         p1 = t0.invert(p0),
         k1 = typeof k === "function" ? k.apply(this, arguments) : k;
     return constrain(translate(scale(t0, k1), p0, p1), e);
   });
 };

 zoom.translateBy = function(selection, x, y) {
   zoom.transform(selection, function() {
     return constrain(this.__zoom.translate(
       typeof x === "function" ? x.apply(this, arguments) : x,
       typeof y === "function" ? y.apply(this, arguments) : y
     ), extent.apply(this, arguments));
   });
 };

 zoom.translateTo = function(selection, x, y) {
   zoom.transform(selection, function() {
     var e = extent.apply(this, arguments),
         t = this.__zoom,
         p = centroid(e);
     return constrain(identity$8.translate(p[0], p[1]).scale(t.k).translate(
       typeof x === "function" ? -x.apply(this, arguments) : -x,
       typeof y === "function" ? -y.apply(this, arguments) : -y
     ), e);
   });
 };

 function scale(transform$$1, k) {
   k = Math.max(k0, Math.min(k1, k));
   return k === transform$$1.k ? transform$$1 : new Transform(k, transform$$1.x, transform$$1.y);
 }

 function translate(transform$$1, p0, p1) {
   var x = p0[0] - p1[0] * transform$$1.k, y = p0[1] - p1[1] * transform$$1.k;
   return x === transform$$1.x && y === transform$$1.y ? transform$$1 : new Transform(transform$$1.k, x, y);
 }

 function constrain(transform$$1, extent) {
   var dx0 = transform$$1.invertX(extent[0][0]) - x0,
       dx1 = transform$$1.invertX(extent[1][0]) - x1,
       dy0 = transform$$1.invertY(extent[0][1]) - y0,
       dy1 = transform$$1.invertY(extent[1][1]) - y1;
   return transform$$1.translate(
     dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
     dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
   );
 }

 function centroid(extent) {
   return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
 }

 function schedule(transition, transform$$1, center) {
   transition
       .on("start.zoom", function() { gesture(this, arguments).start(); })
       .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).end(); })
       .tween("zoom", function() {
         var that = this,
             args = arguments,
             g = gesture(that, args),
             e = extent.apply(that, args),
             p = center || centroid(e),
             w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
             a = that.__zoom,
             b = typeof transform$$1 === "function" ? transform$$1.apply(that, args) : transform$$1,
             i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
         return function(t) {
           if (t === 1) t = b; // Avoid rounding error on end.
           else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }
           g.zoom(null, t);
         };
       });
 }

 function gesture(that, args) {
   for (var i = 0, n = gestures.length, g; i < n; ++i) {
     if ((g = gestures[i]).that === that) {
       return g;
     }
   }
   return new Gesture(that, args);
 }

 function Gesture(that, args) {
   this.that = that;
   this.args = args;
   this.index = -1;
   this.active = 0;
   this.extent = extent.apply(that, args);
 }

 Gesture.prototype = {
   start: function() {
     if (++this.active === 1) {
       this.index = gestures.push(this) - 1;
       this.emit("start");
     }
     return this;
   },
   zoom: function(key, transform$$1) {
     if (this.mouse && key !== "mouse") this.mouse[1] = transform$$1.invert(this.mouse[0]);
     if (this.touch0 && key !== "touch") this.touch0[1] = transform$$1.invert(this.touch0[0]);
     if (this.touch1 && key !== "touch") this.touch1[1] = transform$$1.invert(this.touch1[0]);
     this.that.__zoom = transform$$1;
     this.emit("zoom");
     return this;
   },
   end: function() {
     if (--this.active === 0) {
       gestures.splice(this.index, 1);
       this.index = -1;
       this.emit("end");
     }
     return this;
   },
   emit: function(type) {
     customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]);
   }
 };

 function wheeled() {
   if (!filter.apply(this, arguments)) return;
   var g = gesture(this, arguments),
       t = this.__zoom,
       k = Math.max(k0, Math.min(k1, t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
       p = mouse(this);

   // If the mouse is in the same location as before, reuse it.
   // If there were recent wheel events, reset the wheel idle timeout.
   if (g.wheel) {
     if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
       g.mouse[1] = t.invert(g.mouse[0] = p);
     }
     clearTimeout(g.wheel);
   }

   // If this wheel event won’t trigger a transform change, ignore it.
   else if (t.k === k) return;

   // Otherwise, capture the mouse point and location at the start.
   else {
     g.mouse = [p, t.invert(p)];
     interrupt(this);
     g.start();
   }

   noevent$2();
   g.wheel = setTimeout(wheelidled, wheelDelay);
   g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent));

   function wheelidled() {
     g.wheel = null;
     g.end();
   }
 }

 function mousedowned() {
   if (touchending || !filter.apply(this, arguments)) return;
   var g = gesture(this, arguments),
       v = select(exports.event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
       p = mouse(this),
       x0 = exports.event.clientX,
       y0 = exports.event.clientY;

   dragDisable(exports.event.view);
   nopropagation$2();
   g.mouse = [p, this.__zoom.invert(p)];
   interrupt(this);
   g.start();

   function mousemoved() {
     noevent$2();
     if (!g.moved) {
       var dx = exports.event.clientX - x0, dy = exports.event.clientY - y0;
       g.moved = dx * dx + dy * dy > clickDistance2;
     }
     g.zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent));
   }

   function mouseupped() {
     v.on("mousemove.zoom mouseup.zoom", null);
     yesdrag(exports.event.view, g.moved);
     noevent$2();
     g.end();
   }
 }

 function dblclicked() {
   if (!filter.apply(this, arguments)) return;
   var t0 = this.__zoom,
       p0 = mouse(this),
       p1 = t0.invert(p0),
       k1 = t0.k * (exports.event.shiftKey ? 0.5 : 2),
       t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments));

   noevent$2();
   if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0);
   else select(this).call(zoom.transform, t1);
 }

 function touchstarted() {
   if (!filter.apply(this, arguments)) return;
   var g = gesture(this, arguments),
       touches = exports.event.changedTouches,
       started,
       n = touches.length, i, t, p;

   nopropagation$2();
   for (i = 0; i < n; ++i) {
     t = touches[i], p = touch(this, touches, t.identifier);
     p = [p, this.__zoom.invert(p), t.identifier];
     if (!g.touch0) g.touch0 = p, started = true;
     else if (!g.touch1) g.touch1 = p;
   }

   // If this is a dbltap, reroute to the (optional) dblclick.zoom handler.
   if (touchstarting) {
     touchstarting = clearTimeout(touchstarting);
     if (!g.touch1) {
       g.end();
       p = select(this).on("dblclick.zoom");
       if (p) p.apply(this, arguments);
       return;
     }
   }

   if (started) {
     touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay);
     interrupt(this);
     g.start();
   }
 }

 function touchmoved() {
   var g = gesture(this, arguments),
       touches = exports.event.changedTouches,
       n = touches.length, i, t, p, l;

   noevent$2();
   if (touchstarting) touchstarting = clearTimeout(touchstarting);
   for (i = 0; i < n; ++i) {
     t = touches[i], p = touch(this, touches, t.identifier);
     if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;
     else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
   }
   t = g.that.__zoom;
   if (g.touch1) {
     var p0 = g.touch0[0], l0 = g.touch0[1],
         p1 = g.touch1[0], l1 = g.touch1[1],
         dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
         dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
     t = scale(t, Math.sqrt(dp / dl));
     p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
     l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
   }
   else if (g.touch0) p = g.touch0[0], l = g.touch0[1];
   else return;
   g.zoom("touch", constrain(translate(t, p, l), g.extent));
 }

 function touchended() {
   var g = gesture(this, arguments),
       touches = exports.event.changedTouches,
       n = touches.length, i, t;

   nopropagation$2();
   if (touchending) clearTimeout(touchending);
   touchending = setTimeout(function() { touchending = null; }, touchDelay);
   for (i = 0; i < n; ++i) {
     t = touches[i];
     if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;
     else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
   }
   if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
   if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);
   else g.end();
 }

 zoom.wheelDelta = function(_) {
   return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$12(+_), zoom) : wheelDelta;
 };

 zoom.filter = function(_) {
   return arguments.length ? (filter = typeof _ === "function" ? _ : constant$12(!!_), zoom) : filter;
 };

 zoom.touchable = function(_) {
   return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$12(!!_), zoom) : touchable;
 };

 zoom.extent = function(_) {
   return arguments.length ? (extent = typeof _ === "function" ? _ : constant$12([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
 };

 zoom.scaleExtent = function(_) {
   return arguments.length ? (k0 = +_[0], k1 = +_[1], zoom) : [k0, k1];
 };

 zoom.translateExtent = function(_) {
   return arguments.length ? (x0 = +_[0][0], x1 = +_[1][0], y0 = +_[0][1], y1 = +_[1][1], zoom) : [[x0, y0], [x1, y1]];
 };

 zoom.duration = function(_) {
   return arguments.length ? (duration = +_, zoom) : duration;
 };

 zoom.interpolate = function(_) {
   return arguments.length ? (interpolate = _, zoom) : interpolate;
 };

 zoom.on = function() {
   var value = listeners.on.apply(listeners, arguments);
   return value === listeners ? zoom : value;
 };

 zoom.clickDistance = function(_) {
   return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
 };

 return zoom;

};

exports.version = version; exports.bisect = bisectRight; exports.bisectRight = bisectRight; exports.bisectLeft = bisectLeft; exports.ascending = ascending; exports.bisector = bisector; exports.cross = cross; exports.descending = descending; exports.deviation = deviation; exports.extent = extent; exports.histogram = histogram; exports.thresholdFreedmanDiaconis = freedmanDiaconis; exports.thresholdScott = scott; exports.thresholdSturges = sturges; exports.max = max; exports.mean = mean; exports.median = median; exports.merge = merge; exports.min = min; exports.pairs = pairs; exports.permute = permute; exports.quantile = threshold; exports.range = sequence; exports.scan = scan; exports.shuffle = shuffle; exports.sum = sum; exports.ticks = ticks; exports.tickIncrement = tickIncrement; exports.tickStep = tickStep; exports.transpose = transpose; exports.variance = variance; exports.zip = zip; exports.axisTop = axisTop; exports.axisRight = axisRight; exports.axisBottom = axisBottom; exports.axisLeft = axisLeft; exports.brush = brush; exports.brushX = brushX; exports.brushY = brushY; exports.brushSelection = brushSelection; exports.chord = chord; exports.ribbon = ribbon; exports.nest = nest; exports.set = set$2; exports.map = map$1; exports.keys = keys; exports.values = values; exports.entries = entries; exports.color = color; exports.rgb = rgb; exports.hsl = hsl; exports.lab = lab; exports.hcl = hcl; exports.cubehelix = cubehelix; exports.dispatch = dispatch; exports.drag = drag; exports.dragDisable = dragDisable; exports.dragEnable = yesdrag; exports.dsvFormat = dsv; exports.csvParse = csvParse; exports.csvParseRows = csvParseRows; exports.csvFormat = csvFormat; exports.csvFormatRows = csvFormatRows; exports.tsvParse = tsvParse; exports.tsvParseRows = tsvParseRows; exports.tsvFormat = tsvFormat; exports.tsvFormatRows = tsvFormatRows; exports.easeLinear = linear$1; exports.easeQuad = quadInOut; exports.easeQuadIn = quadIn; exports.easeQuadOut = quadOut; exports.easeQuadInOut = quadInOut; exports.easeCubic = cubicInOut; exports.easeCubicIn = cubicIn; exports.easeCubicOut = cubicOut; exports.easeCubicInOut = cubicInOut; exports.easePoly = polyInOut; exports.easePolyIn = polyIn; exports.easePolyOut = polyOut; exports.easePolyInOut = polyInOut; exports.easeSin = sinInOut; exports.easeSinIn = sinIn; exports.easeSinOut = sinOut; exports.easeSinInOut = sinInOut; exports.easeExp = expInOut; exports.easeExpIn = expIn; exports.easeExpOut = expOut; exports.easeExpInOut = expInOut; exports.easeCircle = circleInOut; exports.easeCircleIn = circleIn; exports.easeCircleOut = circleOut; exports.easeCircleInOut = circleInOut; exports.easeBounce = bounceOut; exports.easeBounceIn = bounceIn; exports.easeBounceOut = bounceOut; exports.easeBounceInOut = bounceInOut; exports.easeBack = backInOut; exports.easeBackIn = backIn; exports.easeBackOut = backOut; exports.easeBackInOut = backInOut; exports.easeElastic = elasticOut; exports.easeElasticIn = elasticIn; exports.easeElasticOut = elasticOut; exports.easeElasticInOut = elasticInOut; exports.forceCenter = center$1; exports.forceCollide = collide; exports.forceLink = link; exports.forceManyBody = manyBody; exports.forceRadial = radial; exports.forceSimulation = simulation; exports.forceX = x$2; exports.forceY = y$2; exports.formatDefaultLocale = defaultLocale; exports.formatLocale = formatLocale; exports.formatSpecifier = formatSpecifier; exports.precisionFixed = precisionFixed; exports.precisionPrefix = precisionPrefix; exports.precisionRound = precisionRound; exports.geoArea = area; exports.geoBounds = bounds; exports.geoCentroid = centroid; exports.geoCircle = circle; exports.geoClipAntimeridian = clipAntimeridian; exports.geoClipCircle = clipCircle; exports.geoClipExtent = extent$1; exports.geoClipRectangle = clipRectangle; exports.geoContains = contains; exports.geoDistance = distance; exports.geoGraticule = graticule; exports.geoGraticule10 = graticule10; exports.geoInterpolate = interpolate$1; exports.geoLength = length$1; exports.geoPath = index$1; exports.geoAlbers = albers; exports.geoAlbersUsa = albersUsa; exports.geoAzimuthalEqualArea = azimuthalEqualArea; exports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw; exports.geoAzimuthalEquidistant = azimuthalEquidistant; exports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw; exports.geoConicConformal = conicConformal; exports.geoConicConformalRaw = conicConformalRaw; exports.geoConicEqualArea = conicEqualArea; exports.geoConicEqualAreaRaw = conicEqualAreaRaw; exports.geoConicEquidistant = conicEquidistant; exports.geoConicEquidistantRaw = conicEquidistantRaw; exports.geoEquirectangular = equirectangular; exports.geoEquirectangularRaw = equirectangularRaw; exports.geoGnomonic = gnomonic; exports.geoGnomonicRaw = gnomonicRaw; exports.geoIdentity = identity$5; exports.geoProjection = projection; exports.geoProjectionMutator = projectionMutator; exports.geoMercator = mercator; exports.geoMercatorRaw = mercatorRaw; exports.geoNaturalEarth1 = naturalEarth1; exports.geoNaturalEarth1Raw = naturalEarth1Raw; exports.geoOrthographic = orthographic; exports.geoOrthographicRaw = orthographicRaw; exports.geoStereographic = stereographic; exports.geoStereographicRaw = stereographicRaw; exports.geoTransverseMercator = transverseMercator; exports.geoTransverseMercatorRaw = transverseMercatorRaw; exports.geoRotation = rotation; exports.geoStream = geoStream; exports.geoTransform = transform; exports.cluster = cluster; exports.hierarchy = hierarchy; exports.pack = index$2; exports.packSiblings = siblings; exports.packEnclose = enclose; exports.partition = partition; exports.stratify = stratify; exports.tree = tree; exports.treemap = index$3; exports.treemapBinary = binary; exports.treemapDice = treemapDice; exports.treemapSlice = treemapSlice; exports.treemapSliceDice = sliceDice; exports.treemapSquarify = squarify; exports.treemapResquarify = resquarify; exports.interpolate = interpolateValue; exports.interpolateArray = array$1; exports.interpolateBasis = basis$1; exports.interpolateBasisClosed = basisClosed; exports.interpolateDate = date; exports.interpolateNumber = reinterpolate; exports.interpolateObject = object; exports.interpolateRound = interpolateRound; exports.interpolateString = interpolateString; exports.interpolateTransformCss = interpolateTransformCss; exports.interpolateTransformSvg = interpolateTransformSvg; exports.interpolateZoom = interpolateZoom; exports.interpolateRgb = interpolateRgb; exports.interpolateRgbBasis = rgbBasis; exports.interpolateRgbBasisClosed = rgbBasisClosed; exports.interpolateHsl = hsl$2; exports.interpolateHslLong = hslLong; exports.interpolateLab = lab$1; exports.interpolateHcl = hcl$2; exports.interpolateHclLong = hclLong; exports.interpolateCubehelix = cubehelix$2; exports.interpolateCubehelixLong = cubehelixLong; exports.quantize = quantize; exports.path = path; exports.polygonArea = area$1; exports.polygonCentroid = centroid$1; exports.polygonHull = hull; exports.polygonContains = contains$1; exports.polygonLength = length$2; exports.quadtree = quadtree; exports.queue = queue; exports.randomUniform = uniform; exports.randomNormal = normal; exports.randomLogNormal = logNormal; exports.randomBates = bates; exports.randomIrwinHall = irwinHall; exports.randomExponential = exponential$1; exports.request = request; exports.html = html; exports.json = json; exports.text = text; exports.xml = xml; exports.csv = csv$1; exports.tsv = tsv$1; exports.scaleBand = band; exports.scalePoint = point$1; exports.scaleIdentity = identity$6; exports.scaleLinear = linear$2; exports.scaleLog = log$1; exports.scaleOrdinal = ordinal; exports.scaleImplicit = implicit; exports.scalePow = pow$1; exports.scaleSqrt = sqrt$1; exports.scaleQuantile = quantile$$1; exports.scaleQuantize = quantize$1; exports.scaleThreshold = threshold$1; exports.scaleTime = time; exports.scaleUtc = utcTime; exports.schemeCategory10 = category10; exports.schemeCategory20b = category20b; exports.schemeCategory20c = category20c; exports.schemeCategory20 = category20; exports.interpolateCubehelixDefault = cubehelix$3; exports.interpolateRainbow = rainbow$1; exports.interpolateWarm = warm; exports.interpolateCool = cool; exports.interpolateViridis = viridis; exports.interpolateMagma = magma; exports.interpolateInferno = inferno; exports.interpolatePlasma = plasma; exports.scaleSequential = sequential; exports.creator = creator; exports.local = local$1; exports.matcher = matcher$1; exports.mouse = mouse; exports.namespace = namespace; exports.namespaces = namespaces; exports.select = select; exports.selectAll = selectAll; exports.selection = selection; exports.selector = selector; exports.selectorAll = selectorAll; exports.style = styleValue; exports.touch = touch; exports.touches = touches; exports.window = defaultView; exports.customEvent = customEvent; exports.arc = arc; exports.area = area$2; exports.line = line; exports.pie = pie; exports.areaRadial = areaRadial; exports.radialArea = areaRadial; exports.lineRadial = lineRadial$1; exports.radialLine = lineRadial$1; exports.pointRadial = pointRadial; exports.linkHorizontal = linkHorizontal; exports.linkVertical = linkVertical; exports.linkRadial = linkRadial; exports.symbol = symbol; exports.symbols = symbols; exports.symbolCircle = circle$2; exports.symbolCross = cross$2; exports.symbolDiamond = diamond; exports.symbolSquare = square; exports.symbolStar = star; exports.symbolTriangle = triangle; exports.symbolWye = wye; exports.curveBasisClosed = basisClosed$1; exports.curveBasisOpen = basisOpen; exports.curveBasis = basis$2; exports.curveBundle = bundle; exports.curveCardinalClosed = cardinalClosed; exports.curveCardinalOpen = cardinalOpen; exports.curveCardinal = cardinal; exports.curveCatmullRomClosed = catmullRomClosed; exports.curveCatmullRomOpen = catmullRomOpen; exports.curveCatmullRom = catmullRom; exports.curveLinearClosed = linearClosed; exports.curveLinear = curveLinear; exports.curveMonotoneX = monotoneX; exports.curveMonotoneY = monotoneY; exports.curveNatural = natural; exports.curveStep = step; exports.curveStepAfter = stepAfter; exports.curveStepBefore = stepBefore; exports.stack = stack; exports.stackOffsetExpand = expand; exports.stackOffsetDiverging = diverging; exports.stackOffsetNone = none$1; exports.stackOffsetSilhouette = silhouette; exports.stackOffsetWiggle = wiggle; exports.stackOrderAscending = ascending$2; exports.stackOrderDescending = descending$2; exports.stackOrderInsideOut = insideOut; exports.stackOrderNone = none$2; exports.stackOrderReverse = reverse; exports.timeInterval = newInterval; exports.timeMillisecond = millisecond; exports.timeMilliseconds = milliseconds; exports.utcMillisecond = millisecond; exports.utcMilliseconds = milliseconds; exports.timeSecond = second; exports.timeSeconds = seconds; exports.utcSecond = second; exports.utcSeconds = seconds; exports.timeMinute = minute; exports.timeMinutes = minutes; exports.timeHour = hour; exports.timeHours = hours; exports.timeDay = day; exports.timeDays = days; exports.timeWeek = sunday; exports.timeWeeks = sundays; exports.timeSunday = sunday; exports.timeSundays = sundays; exports.timeMonday = monday; exports.timeMondays = mondays; exports.timeTuesday = tuesday; exports.timeTuesdays = tuesdays; exports.timeWednesday = wednesday; exports.timeWednesdays = wednesdays; exports.timeThursday = thursday; exports.timeThursdays = thursdays; exports.timeFriday = friday; exports.timeFridays = fridays; exports.timeSaturday = saturday; exports.timeSaturdays = saturdays; exports.timeMonth = month; exports.timeMonths = months; exports.timeYear = year; exports.timeYears = years; exports.utcMinute = utcMinute; exports.utcMinutes = utcMinutes; exports.utcHour = utcHour; exports.utcHours = utcHours; exports.utcDay = utcDay; exports.utcDays = utcDays; exports.utcWeek = utcSunday; exports.utcWeeks = utcSundays; exports.utcSunday = utcSunday; exports.utcSundays = utcSundays; exports.utcMonday = utcMonday; exports.utcMondays = utcMondays; exports.utcTuesday = utcTuesday; exports.utcTuesdays = utcTuesdays; exports.utcWednesday = utcWednesday; exports.utcWednesdays = utcWednesdays; exports.utcThursday = utcThursday; exports.utcThursdays = utcThursdays; exports.utcFriday = utcFriday; exports.utcFridays = utcFridays; exports.utcSaturday = utcSaturday; exports.utcSaturdays = utcSaturdays; exports.utcMonth = utcMonth; exports.utcMonths = utcMonths; exports.utcYear = utcYear; exports.utcYears = utcYears; exports.timeFormatDefaultLocale = defaultLocale$1; exports.timeFormatLocale = formatLocale$1; exports.isoFormat = formatIso; exports.isoParse = parseIso; exports.now = now; exports.timer = timer; exports.timerFlush = timerFlush; exports.timeout = timeout$1; exports.interval = interval$1; exports.transition = transition; exports.active = active; exports.interrupt = interrupt; exports.voronoi = voronoi; exports.zoom = zoom; exports.zoomTransform = transform$1; exports.zoomIdentity = identity$8;

Object.defineProperty(exports, '__esModule', { value: true });

})));