paulo@89: !function() {
paulo@89:   var d3 = {
paulo@89:     version: "3.5.17"
paulo@89:   };
paulo@89:   var d3_arraySlice = [].slice, d3_array = function(list) {
paulo@89:     return d3_arraySlice.call(list);
paulo@89:   };
paulo@89:   var d3_document = this.document;
paulo@89:   function d3_documentElement(node) {
paulo@89:     return node && (node.ownerDocument || node.document || node).documentElement;
paulo@89:   }
paulo@89:   function d3_window(node) {
paulo@89:     return node && (node.ownerDocument && node.ownerDocument.defaultView || node.document && node || node.defaultView);
paulo@89:   }
paulo@89:   if (d3_document) {
paulo@89:     try {
paulo@89:       d3_array(d3_document.documentElement.childNodes)[0].nodeType;
paulo@89:     } catch (e) {
paulo@89:       d3_array = function(list) {
paulo@89:         var i = list.length, array = new Array(i);
paulo@89:         while (i--) array[i] = list[i];
paulo@89:         return array;
paulo@89:       };
paulo@89:     }
paulo@89:   }
paulo@89:   if (!Date.now) Date.now = function() {
paulo@89:     return +new Date();
paulo@89:   };
paulo@89:   if (d3_document) {
paulo@89:     try {
paulo@89:       d3_document.createElement("DIV").style.setProperty("opacity", 0, "");
paulo@89:     } catch (error) {
paulo@89:       var d3_element_prototype = this.Element.prototype, d3_element_setAttribute = d3_element_prototype.setAttribute, d3_element_setAttributeNS = d3_element_prototype.setAttributeNS, d3_style_prototype = this.CSSStyleDeclaration.prototype, d3_style_setProperty = d3_style_prototype.setProperty;
paulo@89:       d3_element_prototype.setAttribute = function(name, value) {
paulo@89:         d3_element_setAttribute.call(this, name, value + "");
paulo@89:       };
paulo@89:       d3_element_prototype.setAttributeNS = function(space, local, value) {
paulo@89:         d3_element_setAttributeNS.call(this, space, local, value + "");
paulo@89:       };
paulo@89:       d3_style_prototype.setProperty = function(name, value, priority) {
paulo@89:         d3_style_setProperty.call(this, name, value + "", priority);
paulo@89:       };
paulo@89:     }
paulo@89:   }
paulo@89:   d3.ascending = d3_ascending;
paulo@89:   function d3_ascending(a, b) {
paulo@89:     return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
paulo@89:   }
paulo@89:   d3.descending = function(a, b) {
paulo@89:     return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
paulo@89:   };
paulo@89:   d3.min = function(array, f) {
paulo@89:     var i = -1, n = array.length, a, b;
paulo@89:     if (arguments.length === 1) {
paulo@89:       while (++i < n) if ((b = array[i]) != null && b >= b) {
paulo@89:         a = b;
paulo@89:         break;
paulo@89:       }
paulo@89:       while (++i < n) if ((b = array[i]) != null && a > b) a = b;
paulo@89:     } else {
paulo@89:       while (++i < n) if ((b = f.call(array, array[i], i)) != null && b >= b) {
paulo@89:         a = b;
paulo@89:         break;
paulo@89:       }
paulo@89:       while (++i < n) if ((b = f.call(array, array[i], i)) != null && a > b) a = b;
paulo@89:     }
paulo@89:     return a;
paulo@89:   };
paulo@89:   d3.max = function(array, f) {
paulo@89:     var i = -1, n = array.length, a, b;
paulo@89:     if (arguments.length === 1) {
paulo@89:       while (++i < n) if ((b = array[i]) != null && b >= b) {
paulo@89:         a = b;
paulo@89:         break;
paulo@89:       }
paulo@89:       while (++i < n) if ((b = array[i]) != null && b > a) a = b;
paulo@89:     } else {
paulo@89:       while (++i < n) if ((b = f.call(array, array[i], i)) != null && b >= b) {
paulo@89:         a = b;
paulo@89:         break;
paulo@89:       }
paulo@89:       while (++i < n) if ((b = f.call(array, array[i], i)) != null && b > a) a = b;
paulo@89:     }
paulo@89:     return a;
paulo@89:   };
paulo@89:   d3.extent = function(array, f) {
paulo@89:     var i = -1, n = array.length, a, b, c;
paulo@89:     if (arguments.length === 1) {
paulo@89:       while (++i < n) if ((b = array[i]) != null && b >= b) {
paulo@89:         a = c = b;
paulo@89:         break;
paulo@89:       }
paulo@89:       while (++i < n) if ((b = array[i]) != null) {
paulo@89:         if (a > b) a = b;
paulo@89:         if (c < b) c = b;
paulo@89:       }
paulo@89:     } else {
paulo@89:       while (++i < n) if ((b = f.call(array, array[i], i)) != null && b >= b) {
paulo@89:         a = c = b;
paulo@89:         break;
paulo@89:       }
paulo@89:       while (++i < n) if ((b = f.call(array, array[i], i)) != null) {
paulo@89:         if (a > b) a = b;
paulo@89:         if (c < b) c = b;
paulo@89:       }
paulo@89:     }
paulo@89:     return [ a, c ];
paulo@89:   };
paulo@89:   function d3_number(x) {
paulo@89:     return x === null ? NaN : +x;
paulo@89:   }
paulo@89:   function d3_numeric(x) {
paulo@89:     return !isNaN(x);
paulo@89:   }
paulo@89:   d3.sum = function(array, f) {
paulo@89:     var s = 0, n = array.length, a, i = -1;
paulo@89:     if (arguments.length === 1) {
paulo@89:       while (++i < n) if (d3_numeric(a = +array[i])) s += a;
paulo@89:     } else {
paulo@89:       while (++i < n) if (d3_numeric(a = +f.call(array, array[i], i))) s += a;
paulo@89:     }
paulo@89:     return s;
paulo@89:   };
paulo@89:   d3.mean = function(array, f) {
paulo@89:     var s = 0, n = array.length, a, i = -1, j = n;
paulo@89:     if (arguments.length === 1) {
paulo@89:       while (++i < n) if (d3_numeric(a = d3_number(array[i]))) s += a; else --j;
paulo@89:     } else {
paulo@89:       while (++i < n) if (d3_numeric(a = d3_number(f.call(array, array[i], i)))) s += a; else --j;
paulo@89:     }
paulo@89:     if (j) return s / j;
paulo@89:   };
paulo@89:   d3.quantile = function(values, p) {
paulo@89:     var H = (values.length - 1) * p + 1, h = Math.floor(H), v = +values[h - 1], e = H - h;
paulo@89:     return e ? v + e * (values[h] - v) : v;
paulo@89:   };
paulo@89:   d3.median = function(array, f) {
paulo@89:     var numbers = [], n = array.length, a, i = -1;
paulo@89:     if (arguments.length === 1) {
paulo@89:       while (++i < n) if (d3_numeric(a = d3_number(array[i]))) numbers.push(a);
paulo@89:     } else {
paulo@89:       while (++i < n) if (d3_numeric(a = d3_number(f.call(array, array[i], i)))) numbers.push(a);
paulo@89:     }
paulo@89:     if (numbers.length) return d3.quantile(numbers.sort(d3_ascending), .5);
paulo@89:   };
paulo@89:   d3.variance = function(array, f) {
paulo@89:     var n = array.length, m = 0, a, d, s = 0, i = -1, j = 0;
paulo@89:     if (arguments.length === 1) {
paulo@89:       while (++i < n) {
paulo@89:         if (d3_numeric(a = d3_number(array[i]))) {
paulo@89:           d = a - m;
paulo@89:           m += d / ++j;
paulo@89:           s += d * (a - m);
paulo@89:         }
paulo@89:       }
paulo@89:     } else {
paulo@89:       while (++i < n) {
paulo@89:         if (d3_numeric(a = d3_number(f.call(array, array[i], i)))) {
paulo@89:           d = a - m;
paulo@89:           m += d / ++j;
paulo@89:           s += d * (a - m);
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     if (j > 1) return s / (j - 1);
paulo@89:   };
paulo@89:   d3.deviation = function() {
paulo@89:     var v = d3.variance.apply(this, arguments);
paulo@89:     return v ? Math.sqrt(v) : v;
paulo@89:   };
paulo@89:   function d3_bisector(compare) {
paulo@89:     return {
paulo@89:       left: function(a, x, lo, hi) {
paulo@89:         if (arguments.length < 3) lo = 0;
paulo@89:         if (arguments.length < 4) hi = a.length;
paulo@89:         while (lo < hi) {
paulo@89:           var mid = lo + hi >>> 1;
paulo@89:           if (compare(a[mid], x) < 0) lo = mid + 1; else hi = mid;
paulo@89:         }
paulo@89:         return lo;
paulo@89:       },
paulo@89:       right: function(a, x, lo, hi) {
paulo@89:         if (arguments.length < 3) lo = 0;
paulo@89:         if (arguments.length < 4) hi = a.length;
paulo@89:         while (lo < hi) {
paulo@89:           var mid = lo + hi >>> 1;
paulo@89:           if (compare(a[mid], x) > 0) hi = mid; else lo = mid + 1;
paulo@89:         }
paulo@89:         return lo;
paulo@89:       }
paulo@89:     };
paulo@89:   }
paulo@89:   var d3_bisect = d3_bisector(d3_ascending);
paulo@89:   d3.bisectLeft = d3_bisect.left;
paulo@89:   d3.bisect = d3.bisectRight = d3_bisect.right;
paulo@89:   d3.bisector = function(f) {
paulo@89:     return d3_bisector(f.length === 1 ? function(d, x) {
paulo@89:       return d3_ascending(f(d), x);
paulo@89:     } : f);
paulo@89:   };
paulo@89:   d3.shuffle = function(array, i0, i1) {
paulo@89:     if ((m = arguments.length) < 3) {
paulo@89:       i1 = array.length;
paulo@89:       if (m < 2) i0 = 0;
paulo@89:     }
paulo@89:     var m = i1 - i0, t, i;
paulo@89:     while (m) {
paulo@89:       i = Math.random() * m-- | 0;
paulo@89:       t = array[m + i0], array[m + i0] = array[i + i0], array[i + i0] = t;
paulo@89:     }
paulo@89:     return array;
paulo@89:   };
paulo@89:   d3.permute = function(array, indexes) {
paulo@89:     var i = indexes.length, permutes = new Array(i);
paulo@89:     while (i--) permutes[i] = array[indexes[i]];
paulo@89:     return permutes;
paulo@89:   };
paulo@89:   d3.pairs = function(array) {
paulo@89:     var i = 0, n = array.length - 1, p0, p1 = array[0], pairs = new Array(n < 0 ? 0 : n);
paulo@89:     while (i < n) pairs[i] = [ p0 = p1, p1 = array[++i] ];
paulo@89:     return pairs;
paulo@89:   };
paulo@89:   d3.transpose = function(matrix) {
paulo@89:     if (!(n = matrix.length)) return [];
paulo@89:     for (var i = -1, m = d3.min(matrix, d3_transposeLength), transpose = new Array(m); ++i < m; ) {
paulo@89:       for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n; ) {
paulo@89:         row[j] = matrix[j][i];
paulo@89:       }
paulo@89:     }
paulo@89:     return transpose;
paulo@89:   };
paulo@89:   function d3_transposeLength(d) {
paulo@89:     return d.length;
paulo@89:   }
paulo@89:   d3.zip = function() {
paulo@89:     return d3.transpose(arguments);
paulo@89:   };
paulo@89:   d3.keys = function(map) {
paulo@89:     var keys = [];
paulo@89:     for (var key in map) keys.push(key);
paulo@89:     return keys;
paulo@89:   };
paulo@89:   d3.values = function(map) {
paulo@89:     var values = [];
paulo@89:     for (var key in map) values.push(map[key]);
paulo@89:     return values;
paulo@89:   };
paulo@89:   d3.entries = function(map) {
paulo@89:     var entries = [];
paulo@89:     for (var key in map) entries.push({
paulo@89:       key: key,
paulo@89:       value: map[key]
paulo@89:     });
paulo@89:     return entries;
paulo@89:   };
paulo@89:   d3.merge = function(arrays) {
paulo@89:     var n = arrays.length, m, i = -1, j = 0, merged, array;
paulo@89:     while (++i < n) j += arrays[i].length;
paulo@89:     merged = new Array(j);
paulo@89:     while (--n >= 0) {
paulo@89:       array = arrays[n];
paulo@89:       m = array.length;
paulo@89:       while (--m >= 0) {
paulo@89:         merged[--j] = array[m];
paulo@89:       }
paulo@89:     }
paulo@89:     return merged;
paulo@89:   };
paulo@89:   var abs = Math.abs;
paulo@89:   d3.range = function(start, stop, step) {
paulo@89:     if (arguments.length < 3) {
paulo@89:       step = 1;
paulo@89:       if (arguments.length < 2) {
paulo@89:         stop = start;
paulo@89:         start = 0;
paulo@89:       }
paulo@89:     }
paulo@89:     if ((stop - start) / step === Infinity) throw new Error("infinite range");
paulo@89:     var range = [], k = d3_range_integerScale(abs(step)), i = -1, j;
paulo@89:     start *= k, stop *= k, step *= k;
paulo@89:     if (step < 0) while ((j = start + step * ++i) > stop) range.push(j / k); else while ((j = start + step * ++i) < stop) range.push(j / k);
paulo@89:     return range;
paulo@89:   };
paulo@89:   function d3_range_integerScale(x) {
paulo@89:     var k = 1;
paulo@89:     while (x * k % 1) k *= 10;
paulo@89:     return k;
paulo@89:   }
paulo@89:   function d3_class(ctor, properties) {
paulo@89:     for (var key in properties) {
paulo@89:       Object.defineProperty(ctor.prototype, key, {
paulo@89:         value: properties[key],
paulo@89:         enumerable: false
paulo@89:       });
paulo@89:     }
paulo@89:   }
paulo@89:   d3.map = function(object, f) {
paulo@89:     var map = new d3_Map();
paulo@89:     if (object instanceof d3_Map) {
paulo@89:       object.forEach(function(key, value) {
paulo@89:         map.set(key, value);
paulo@89:       });
paulo@89:     } else if (Array.isArray(object)) {
paulo@89:       var i = -1, n = object.length, o;
paulo@89:       if (arguments.length === 1) while (++i < n) map.set(i, object[i]); else while (++i < n) map.set(f.call(object, o = object[i], i), o);
paulo@89:     } else {
paulo@89:       for (var key in object) map.set(key, object[key]);
paulo@89:     }
paulo@89:     return map;
paulo@89:   };
paulo@89:   function d3_Map() {
paulo@89:     this._ = Object.create(null);
paulo@89:   }
paulo@89:   var d3_map_proto = "__proto__", d3_map_zero = "\x00";
paulo@89:   d3_class(d3_Map, {
paulo@89:     has: d3_map_has,
paulo@89:     get: function(key) {
paulo@89:       return this._[d3_map_escape(key)];
paulo@89:     },
paulo@89:     set: function(key, value) {
paulo@89:       return this._[d3_map_escape(key)] = value;
paulo@89:     },
paulo@89:     remove: d3_map_remove,
paulo@89:     keys: d3_map_keys,
paulo@89:     values: function() {
paulo@89:       var values = [];
paulo@89:       for (var key in this._) values.push(this._[key]);
paulo@89:       return values;
paulo@89:     },
paulo@89:     entries: function() {
paulo@89:       var entries = [];
paulo@89:       for (var key in this._) entries.push({
paulo@89:         key: d3_map_unescape(key),
paulo@89:         value: this._[key]
paulo@89:       });
paulo@89:       return entries;
paulo@89:     },
paulo@89:     size: d3_map_size,
paulo@89:     empty: d3_map_empty,
paulo@89:     forEach: function(f) {
paulo@89:       for (var key in this._) f.call(this, d3_map_unescape(key), this._[key]);
paulo@89:     }
paulo@89:   });
paulo@89:   function d3_map_escape(key) {
paulo@89:     return (key += "") === d3_map_proto || key[0] === d3_map_zero ? d3_map_zero + key : key;
paulo@89:   }
paulo@89:   function d3_map_unescape(key) {
paulo@89:     return (key += "")[0] === d3_map_zero ? key.slice(1) : key;
paulo@89:   }
paulo@89:   function d3_map_has(key) {
paulo@89:     return d3_map_escape(key) in this._;
paulo@89:   }
paulo@89:   function d3_map_remove(key) {
paulo@89:     return (key = d3_map_escape(key)) in this._ && delete this._[key];
paulo@89:   }
paulo@89:   function d3_map_keys() {
paulo@89:     var keys = [];
paulo@89:     for (var key in this._) keys.push(d3_map_unescape(key));
paulo@89:     return keys;
paulo@89:   }
paulo@89:   function d3_map_size() {
paulo@89:     var size = 0;
paulo@89:     for (var key in this._) ++size;
paulo@89:     return size;
paulo@89:   }
paulo@89:   function d3_map_empty() {
paulo@89:     for (var key in this._) return false;
paulo@89:     return true;
paulo@89:   }
paulo@89:   d3.nest = function() {
paulo@89:     var nest = {}, keys = [], sortKeys = [], sortValues, rollup;
paulo@89:     function map(mapType, array, depth) {
paulo@89:       if (depth >= keys.length) return rollup ? rollup.call(nest, array) : sortValues ? array.sort(sortValues) : array;
paulo@89:       var i = -1, n = array.length, key = keys[depth++], keyValue, object, setter, valuesByKey = new d3_Map(), values;
paulo@89:       while (++i < n) {
paulo@89:         if (values = valuesByKey.get(keyValue = key(object = array[i]))) {
paulo@89:           values.push(object);
paulo@89:         } else {
paulo@89:           valuesByKey.set(keyValue, [ object ]);
paulo@89:         }
paulo@89:       }
paulo@89:       if (mapType) {
paulo@89:         object = mapType();
paulo@89:         setter = function(keyValue, values) {
paulo@89:           object.set(keyValue, map(mapType, values, depth));
paulo@89:         };
paulo@89:       } else {
paulo@89:         object = {};
paulo@89:         setter = function(keyValue, values) {
paulo@89:           object[keyValue] = map(mapType, values, depth);
paulo@89:         };
paulo@89:       }
paulo@89:       valuesByKey.forEach(setter);
paulo@89:       return object;
paulo@89:     }
paulo@89:     function entries(map, depth) {
paulo@89:       if (depth >= keys.length) return map;
paulo@89:       var array = [], sortKey = sortKeys[depth++];
paulo@89:       map.forEach(function(key, keyMap) {
paulo@89:         array.push({
paulo@89:           key: key,
paulo@89:           values: entries(keyMap, depth)
paulo@89:         });
paulo@89:       });
paulo@89:       return sortKey ? array.sort(function(a, b) {
paulo@89:         return sortKey(a.key, b.key);
paulo@89:       }) : array;
paulo@89:     }
paulo@89:     nest.map = function(array, mapType) {
paulo@89:       return map(mapType, array, 0);
paulo@89:     };
paulo@89:     nest.entries = function(array) {
paulo@89:       return entries(map(d3.map, array, 0), 0);
paulo@89:     };
paulo@89:     nest.key = function(d) {
paulo@89:       keys.push(d);
paulo@89:       return nest;
paulo@89:     };
paulo@89:     nest.sortKeys = function(order) {
paulo@89:       sortKeys[keys.length - 1] = order;
paulo@89:       return nest;
paulo@89:     };
paulo@89:     nest.sortValues = function(order) {
paulo@89:       sortValues = order;
paulo@89:       return nest;
paulo@89:     };
paulo@89:     nest.rollup = function(f) {
paulo@89:       rollup = f;
paulo@89:       return nest;
paulo@89:     };
paulo@89:     return nest;
paulo@89:   };
paulo@89:   d3.set = function(array) {
paulo@89:     var set = new d3_Set();
paulo@89:     if (array) for (var i = 0, n = array.length; i < n; ++i) set.add(array[i]);
paulo@89:     return set;
paulo@89:   };
paulo@89:   function d3_Set() {
paulo@89:     this._ = Object.create(null);
paulo@89:   }
paulo@89:   d3_class(d3_Set, {
paulo@89:     has: d3_map_has,
paulo@89:     add: function(key) {
paulo@89:       this._[d3_map_escape(key += "")] = true;
paulo@89:       return key;
paulo@89:     },
paulo@89:     remove: d3_map_remove,
paulo@89:     values: d3_map_keys,
paulo@89:     size: d3_map_size,
paulo@89:     empty: d3_map_empty,
paulo@89:     forEach: function(f) {
paulo@89:       for (var key in this._) f.call(this, d3_map_unescape(key));
paulo@89:     }
paulo@89:   });
paulo@89:   d3.behavior = {};
paulo@89:   function d3_identity(d) {
paulo@89:     return d;
paulo@89:   }
paulo@89:   d3.rebind = function(target, source) {
paulo@89:     var i = 1, n = arguments.length, method;
paulo@89:     while (++i < n) target[method = arguments[i]] = d3_rebind(target, source, source[method]);
paulo@89:     return target;
paulo@89:   };
paulo@89:   function d3_rebind(target, source, method) {
paulo@89:     return function() {
paulo@89:       var value = method.apply(source, arguments);
paulo@89:       return value === source ? target : value;
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_vendorSymbol(object, name) {
paulo@89:     if (name in object) return name;
paulo@89:     name = name.charAt(0).toUpperCase() + name.slice(1);
paulo@89:     for (var i = 0, n = d3_vendorPrefixes.length; i < n; ++i) {
paulo@89:       var prefixName = d3_vendorPrefixes[i] + name;
paulo@89:       if (prefixName in object) return prefixName;
paulo@89:     }
paulo@89:   }
paulo@89:   var d3_vendorPrefixes = [ "webkit", "ms", "moz", "Moz", "o", "O" ];
paulo@89:   function d3_noop() {}
paulo@89:   d3.dispatch = function() {
paulo@89:     var dispatch = new d3_dispatch(), i = -1, n = arguments.length;
paulo@89:     while (++i < n) dispatch[arguments[i]] = d3_dispatch_event(dispatch);
paulo@89:     return dispatch;
paulo@89:   };
paulo@89:   function d3_dispatch() {}
paulo@89:   d3_dispatch.prototype.on = function(type, listener) {
paulo@89:     var i = type.indexOf("."), name = "";
paulo@89:     if (i >= 0) {
paulo@89:       name = type.slice(i + 1);
paulo@89:       type = type.slice(0, i);
paulo@89:     }
paulo@89:     if (type) return arguments.length < 2 ? this[type].on(name) : this[type].on(name, listener);
paulo@89:     if (arguments.length === 2) {
paulo@89:       if (listener == null) for (type in this) {
paulo@89:         if (this.hasOwnProperty(type)) this[type].on(name, null);
paulo@89:       }
paulo@89:       return this;
paulo@89:     }
paulo@89:   };
paulo@89:   function d3_dispatch_event(dispatch) {
paulo@89:     var listeners = [], listenerByName = new d3_Map();
paulo@89:     function event() {
paulo@89:       var z = listeners, i = -1, n = z.length, l;
paulo@89:       while (++i < n) if (l = z[i].on) l.apply(this, arguments);
paulo@89:       return dispatch;
paulo@89:     }
paulo@89:     event.on = function(name, listener) {
paulo@89:       var l = listenerByName.get(name), i;
paulo@89:       if (arguments.length < 2) return l && l.on;
paulo@89:       if (l) {
paulo@89:         l.on = null;
paulo@89:         listeners = listeners.slice(0, i = listeners.indexOf(l)).concat(listeners.slice(i + 1));
paulo@89:         listenerByName.remove(name);
paulo@89:       }
paulo@89:       if (listener) listeners.push(listenerByName.set(name, {
paulo@89:         on: listener
paulo@89:       }));
paulo@89:       return dispatch;
paulo@89:     };
paulo@89:     return event;
paulo@89:   }
paulo@89:   d3.event = null;
paulo@89:   function d3_eventPreventDefault() {
paulo@89:     d3.event.preventDefault();
paulo@89:   }
paulo@89:   function d3_eventSource() {
paulo@89:     var e = d3.event, s;
paulo@89:     while (s = e.sourceEvent) e = s;
paulo@89:     return e;
paulo@89:   }
paulo@89:   function d3_eventDispatch(target) {
paulo@89:     var dispatch = new d3_dispatch(), i = 0, n = arguments.length;
paulo@89:     while (++i < n) dispatch[arguments[i]] = d3_dispatch_event(dispatch);
paulo@89:     dispatch.of = function(thiz, argumentz) {
paulo@89:       return function(e1) {
paulo@89:         try {
paulo@89:           var e0 = e1.sourceEvent = d3.event;
paulo@89:           e1.target = target;
paulo@89:           d3.event = e1;
paulo@89:           dispatch[e1.type].apply(thiz, argumentz);
paulo@89:         } finally {
paulo@89:           d3.event = e0;
paulo@89:         }
paulo@89:       };
paulo@89:     };
paulo@89:     return dispatch;
paulo@89:   }
paulo@89:   d3.requote = function(s) {
paulo@89:     return s.replace(d3_requote_re, "\\$&");
paulo@89:   };
paulo@89:   var d3_requote_re = /[\\\^\$\*\+\?\|\[\]\(\)\.\{\}]/g;
paulo@89:   var d3_subclass = {}.__proto__ ? function(object, prototype) {
paulo@89:     object.__proto__ = prototype;
paulo@89:   } : function(object, prototype) {
paulo@89:     for (var property in prototype) object[property] = prototype[property];
paulo@89:   };
paulo@89:   function d3_selection(groups) {
paulo@89:     d3_subclass(groups, d3_selectionPrototype);
paulo@89:     return groups;
paulo@89:   }
paulo@89:   var d3_select = function(s, n) {
paulo@89:     return n.querySelector(s);
paulo@89:   }, d3_selectAll = function(s, n) {
paulo@89:     return n.querySelectorAll(s);
paulo@89:   }, d3_selectMatches = function(n, s) {
paulo@89:     var d3_selectMatcher = n.matches || n[d3_vendorSymbol(n, "matchesSelector")];
paulo@89:     d3_selectMatches = function(n, s) {
paulo@89:       return d3_selectMatcher.call(n, s);
paulo@89:     };
paulo@89:     return d3_selectMatches(n, s);
paulo@89:   };
paulo@89:   if (typeof Sizzle === "function") {
paulo@89:     d3_select = function(s, n) {
paulo@89:       return Sizzle(s, n)[0] || null;
paulo@89:     };
paulo@89:     d3_selectAll = Sizzle;
paulo@89:     d3_selectMatches = Sizzle.matchesSelector;
paulo@89:   }
paulo@89:   d3.selection = function() {
paulo@89:     return d3.select(d3_document.documentElement);
paulo@89:   };
paulo@89:   var d3_selectionPrototype = d3.selection.prototype = [];
paulo@89:   d3_selectionPrototype.select = function(selector) {
paulo@89:     var subgroups = [], subgroup, subnode, group, node;
paulo@89:     selector = d3_selection_selector(selector);
paulo@89:     for (var j = -1, m = this.length; ++j < m; ) {
paulo@89:       subgroups.push(subgroup = []);
paulo@89:       subgroup.parentNode = (group = this[j]).parentNode;
paulo@89:       for (var i = -1, n = group.length; ++i < n; ) {
paulo@89:         if (node = group[i]) {
paulo@89:           subgroup.push(subnode = selector.call(node, node.__data__, i, j));
paulo@89:           if (subnode && "__data__" in node) subnode.__data__ = node.__data__;
paulo@89:         } else {
paulo@89:           subgroup.push(null);
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     return d3_selection(subgroups);
paulo@89:   };
paulo@89:   function d3_selection_selector(selector) {
paulo@89:     return typeof selector === "function" ? selector : function() {
paulo@89:       return d3_select(selector, this);
paulo@89:     };
paulo@89:   }
paulo@89:   d3_selectionPrototype.selectAll = function(selector) {
paulo@89:     var subgroups = [], subgroup, node;
paulo@89:     selector = d3_selection_selectorAll(selector);
paulo@89:     for (var j = -1, m = this.length; ++j < m; ) {
paulo@89:       for (var group = this[j], i = -1, n = group.length; ++i < n; ) {
paulo@89:         if (node = group[i]) {
paulo@89:           subgroups.push(subgroup = d3_array(selector.call(node, node.__data__, i, j)));
paulo@89:           subgroup.parentNode = node;
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     return d3_selection(subgroups);
paulo@89:   };
paulo@89:   function d3_selection_selectorAll(selector) {
paulo@89:     return typeof selector === "function" ? selector : function() {
paulo@89:       return d3_selectAll(selector, this);
paulo@89:     };
paulo@89:   }
paulo@89:   var d3_nsXhtml = "http://www.w3.org/1999/xhtml";
paulo@89:   var d3_nsPrefix = {
paulo@89:     svg: "http://www.w3.org/2000/svg",
paulo@89:     xhtml: d3_nsXhtml,
paulo@89:     xlink: "http://www.w3.org/1999/xlink",
paulo@89:     xml: "http://www.w3.org/XML/1998/namespace",
paulo@89:     xmlns: "http://www.w3.org/2000/xmlns/"
paulo@89:   };
paulo@89:   d3.ns = {
paulo@89:     prefix: d3_nsPrefix,
paulo@89:     qualify: function(name) {
paulo@89:       var i = name.indexOf(":"), prefix = name;
paulo@89:       if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
paulo@89:       return d3_nsPrefix.hasOwnProperty(prefix) ? {
paulo@89:         space: d3_nsPrefix[prefix],
paulo@89:         local: name
paulo@89:       } : name;
paulo@89:     }
paulo@89:   };
paulo@89:   d3_selectionPrototype.attr = function(name, value) {
paulo@89:     if (arguments.length < 2) {
paulo@89:       if (typeof name === "string") {
paulo@89:         var node = this.node();
paulo@89:         name = d3.ns.qualify(name);
paulo@89:         return name.local ? node.getAttributeNS(name.space, name.local) : node.getAttribute(name);
paulo@89:       }
paulo@89:       for (value in name) this.each(d3_selection_attr(value, name[value]));
paulo@89:       return this;
paulo@89:     }
paulo@89:     return this.each(d3_selection_attr(name, value));
paulo@89:   };
paulo@89:   function d3_selection_attr(name, value) {
paulo@89:     name = d3.ns.qualify(name);
paulo@89:     function attrNull() {
paulo@89:       this.removeAttribute(name);
paulo@89:     }
paulo@89:     function attrNullNS() {
paulo@89:       this.removeAttributeNS(name.space, name.local);
paulo@89:     }
paulo@89:     function attrConstant() {
paulo@89:       this.setAttribute(name, value);
paulo@89:     }
paulo@89:     function attrConstantNS() {
paulo@89:       this.setAttributeNS(name.space, name.local, value);
paulo@89:     }
paulo@89:     function attrFunction() {
paulo@89:       var x = value.apply(this, arguments);
paulo@89:       if (x == null) this.removeAttribute(name); else this.setAttribute(name, x);
paulo@89:     }
paulo@89:     function attrFunctionNS() {
paulo@89:       var x = value.apply(this, arguments);
paulo@89:       if (x == null) this.removeAttributeNS(name.space, name.local); else this.setAttributeNS(name.space, name.local, x);
paulo@89:     }
paulo@89:     return value == null ? name.local ? attrNullNS : attrNull : typeof value === "function" ? name.local ? attrFunctionNS : attrFunction : name.local ? attrConstantNS : attrConstant;
paulo@89:   }
paulo@89:   function d3_collapse(s) {
paulo@89:     return s.trim().replace(/\s+/g, " ");
paulo@89:   }
paulo@89:   d3_selectionPrototype.classed = function(name, value) {
paulo@89:     if (arguments.length < 2) {
paulo@89:       if (typeof name === "string") {
paulo@89:         var node = this.node(), n = (name = d3_selection_classes(name)).length, i = -1;
paulo@89:         if (value = node.classList) {
paulo@89:           while (++i < n) if (!value.contains(name[i])) return false;
paulo@89:         } else {
paulo@89:           value = node.getAttribute("class");
paulo@89:           while (++i < n) if (!d3_selection_classedRe(name[i]).test(value)) return false;
paulo@89:         }
paulo@89:         return true;
paulo@89:       }
paulo@89:       for (value in name) this.each(d3_selection_classed(value, name[value]));
paulo@89:       return this;
paulo@89:     }
paulo@89:     return this.each(d3_selection_classed(name, value));
paulo@89:   };
paulo@89:   function d3_selection_classedRe(name) {
paulo@89:     return new RegExp("(?:^|\\s+)" + d3.requote(name) + "(?:\\s+|$)", "g");
paulo@89:   }
paulo@89:   function d3_selection_classes(name) {
paulo@89:     return (name + "").trim().split(/^|\s+/);
paulo@89:   }
paulo@89:   function d3_selection_classed(name, value) {
paulo@89:     name = d3_selection_classes(name).map(d3_selection_classedName);
paulo@89:     var n = name.length;
paulo@89:     function classedConstant() {
paulo@89:       var i = -1;
paulo@89:       while (++i < n) name[i](this, value);
paulo@89:     }
paulo@89:     function classedFunction() {
paulo@89:       var i = -1, x = value.apply(this, arguments);
paulo@89:       while (++i < n) name[i](this, x);
paulo@89:     }
paulo@89:     return typeof value === "function" ? classedFunction : classedConstant;
paulo@89:   }
paulo@89:   function d3_selection_classedName(name) {
paulo@89:     var re = d3_selection_classedRe(name);
paulo@89:     return function(node, value) {
paulo@89:       if (c = node.classList) return value ? c.add(name) : c.remove(name);
paulo@89:       var c = node.getAttribute("class") || "";
paulo@89:       if (value) {
paulo@89:         re.lastIndex = 0;
paulo@89:         if (!re.test(c)) node.setAttribute("class", d3_collapse(c + " " + name));
paulo@89:       } else {
paulo@89:         node.setAttribute("class", d3_collapse(c.replace(re, " ")));
paulo@89:       }
paulo@89:     };
paulo@89:   }
paulo@89:   d3_selectionPrototype.style = function(name, value, priority) {
paulo@89:     var n = arguments.length;
paulo@89:     if (n < 3) {
paulo@89:       if (typeof name !== "string") {
paulo@89:         if (n < 2) value = "";
paulo@89:         for (priority in name) this.each(d3_selection_style(priority, name[priority], value));
paulo@89:         return this;
paulo@89:       }
paulo@89:       if (n < 2) {
paulo@89:         var node = this.node();
paulo@89:         return d3_window(node).getComputedStyle(node, null).getPropertyValue(name);
paulo@89:       }
paulo@89:       priority = "";
paulo@89:     }
paulo@89:     return this.each(d3_selection_style(name, value, priority));
paulo@89:   };
paulo@89:   function d3_selection_style(name, value, priority) {
paulo@89:     function styleNull() {
paulo@89:       this.style.removeProperty(name);
paulo@89:     }
paulo@89:     function styleConstant() {
paulo@89:       this.style.setProperty(name, value, priority);
paulo@89:     }
paulo@89:     function styleFunction() {
paulo@89:       var x = value.apply(this, arguments);
paulo@89:       if (x == null) this.style.removeProperty(name); else this.style.setProperty(name, x, priority);
paulo@89:     }
paulo@89:     return value == null ? styleNull : typeof value === "function" ? styleFunction : styleConstant;
paulo@89:   }
paulo@89:   d3_selectionPrototype.property = function(name, value) {
paulo@89:     if (arguments.length < 2) {
paulo@89:       if (typeof name === "string") return this.node()[name];
paulo@89:       for (value in name) this.each(d3_selection_property(value, name[value]));
paulo@89:       return this;
paulo@89:     }
paulo@89:     return this.each(d3_selection_property(name, value));
paulo@89:   };
paulo@89:   function d3_selection_property(name, value) {
paulo@89:     function propertyNull() {
paulo@89:       delete this[name];
paulo@89:     }
paulo@89:     function propertyConstant() {
paulo@89:       this[name] = value;
paulo@89:     }
paulo@89:     function propertyFunction() {
paulo@89:       var x = value.apply(this, arguments);
paulo@89:       if (x == null) delete this[name]; else this[name] = x;
paulo@89:     }
paulo@89:     return value == null ? propertyNull : typeof value === "function" ? propertyFunction : propertyConstant;
paulo@89:   }
paulo@89:   d3_selectionPrototype.text = function(value) {
paulo@89:     return arguments.length ? this.each(typeof value === "function" ? function() {
paulo@89:       var v = value.apply(this, arguments);
paulo@89:       this.textContent = v == null ? "" : v;
paulo@89:     } : value == null ? function() {
paulo@89:       this.textContent = "";
paulo@89:     } : function() {
paulo@89:       this.textContent = value;
paulo@89:     }) : this.node().textContent;
paulo@89:   };
paulo@89:   d3_selectionPrototype.html = function(value) {
paulo@89:     return arguments.length ? this.each(typeof value === "function" ? function() {
paulo@89:       var v = value.apply(this, arguments);
paulo@89:       this.innerHTML = v == null ? "" : v;
paulo@89:     } : value == null ? function() {
paulo@89:       this.innerHTML = "";
paulo@89:     } : function() {
paulo@89:       this.innerHTML = value;
paulo@89:     }) : this.node().innerHTML;
paulo@89:   };
paulo@89:   d3_selectionPrototype.append = function(name) {
paulo@89:     name = d3_selection_creator(name);
paulo@89:     return this.select(function() {
paulo@89:       return this.appendChild(name.apply(this, arguments));
paulo@89:     });
paulo@89:   };
paulo@89:   function d3_selection_creator(name) {
paulo@89:     function create() {
paulo@89:       var document = this.ownerDocument, namespace = this.namespaceURI;
paulo@89:       return namespace === d3_nsXhtml && document.documentElement.namespaceURI === d3_nsXhtml ? document.createElement(name) : document.createElementNS(namespace, name);
paulo@89:     }
paulo@89:     function createNS() {
paulo@89:       return this.ownerDocument.createElementNS(name.space, name.local);
paulo@89:     }
paulo@89:     return typeof name === "function" ? name : (name = d3.ns.qualify(name)).local ? createNS : create;
paulo@89:   }
paulo@89:   d3_selectionPrototype.insert = function(name, before) {
paulo@89:     name = d3_selection_creator(name);
paulo@89:     before = d3_selection_selector(before);
paulo@89:     return this.select(function() {
paulo@89:       return this.insertBefore(name.apply(this, arguments), before.apply(this, arguments) || null);
paulo@89:     });
paulo@89:   };
paulo@89:   d3_selectionPrototype.remove = function() {
paulo@89:     return this.each(d3_selectionRemove);
paulo@89:   };
paulo@89:   function d3_selectionRemove() {
paulo@89:     var parent = this.parentNode;
paulo@89:     if (parent) parent.removeChild(this);
paulo@89:   }
paulo@89:   d3_selectionPrototype.data = function(value, key) {
paulo@89:     var i = -1, n = this.length, group, node;
paulo@89:     if (!arguments.length) {
paulo@89:       value = new Array(n = (group = this[0]).length);
paulo@89:       while (++i < n) {
paulo@89:         if (node = group[i]) {
paulo@89:           value[i] = node.__data__;
paulo@89:         }
paulo@89:       }
paulo@89:       return value;
paulo@89:     }
paulo@89:     function bind(group, groupData) {
paulo@89:       var i, n = group.length, m = groupData.length, n0 = Math.min(n, m), updateNodes = new Array(m), enterNodes = new Array(m), exitNodes = new Array(n), node, nodeData;
paulo@89:       if (key) {
paulo@89:         var nodeByKeyValue = new d3_Map(), keyValues = new Array(n), keyValue;
paulo@89:         for (i = -1; ++i < n; ) {
paulo@89:           if (node = group[i]) {
paulo@89:             if (nodeByKeyValue.has(keyValue = key.call(node, node.__data__, i))) {
paulo@89:               exitNodes[i] = node;
paulo@89:             } else {
paulo@89:               nodeByKeyValue.set(keyValue, node);
paulo@89:             }
paulo@89:             keyValues[i] = keyValue;
paulo@89:           }
paulo@89:         }
paulo@89:         for (i = -1; ++i < m; ) {
paulo@89:           if (!(node = nodeByKeyValue.get(keyValue = key.call(groupData, nodeData = groupData[i], i)))) {
paulo@89:             enterNodes[i] = d3_selection_dataNode(nodeData);
paulo@89:           } else if (node !== true) {
paulo@89:             updateNodes[i] = node;
paulo@89:             node.__data__ = nodeData;
paulo@89:           }
paulo@89:           nodeByKeyValue.set(keyValue, true);
paulo@89:         }
paulo@89:         for (i = -1; ++i < n; ) {
paulo@89:           if (i in keyValues && nodeByKeyValue.get(keyValues[i]) !== true) {
paulo@89:             exitNodes[i] = group[i];
paulo@89:           }
paulo@89:         }
paulo@89:       } else {
paulo@89:         for (i = -1; ++i < n0; ) {
paulo@89:           node = group[i];
paulo@89:           nodeData = groupData[i];
paulo@89:           if (node) {
paulo@89:             node.__data__ = nodeData;
paulo@89:             updateNodes[i] = node;
paulo@89:           } else {
paulo@89:             enterNodes[i] = d3_selection_dataNode(nodeData);
paulo@89:           }
paulo@89:         }
paulo@89:         for (;i < m; ++i) {
paulo@89:           enterNodes[i] = d3_selection_dataNode(groupData[i]);
paulo@89:         }
paulo@89:         for (;i < n; ++i) {
paulo@89:           exitNodes[i] = group[i];
paulo@89:         }
paulo@89:       }
paulo@89:       enterNodes.update = updateNodes;
paulo@89:       enterNodes.parentNode = updateNodes.parentNode = exitNodes.parentNode = group.parentNode;
paulo@89:       enter.push(enterNodes);
paulo@89:       update.push(updateNodes);
paulo@89:       exit.push(exitNodes);
paulo@89:     }
paulo@89:     var enter = d3_selection_enter([]), update = d3_selection([]), exit = d3_selection([]);
paulo@89:     if (typeof value === "function") {
paulo@89:       while (++i < n) {
paulo@89:         bind(group = this[i], value.call(group, group.parentNode.__data__, i));
paulo@89:       }
paulo@89:     } else {
paulo@89:       while (++i < n) {
paulo@89:         bind(group = this[i], value);
paulo@89:       }
paulo@89:     }
paulo@89:     update.enter = function() {
paulo@89:       return enter;
paulo@89:     };
paulo@89:     update.exit = function() {
paulo@89:       return exit;
paulo@89:     };
paulo@89:     return update;
paulo@89:   };
paulo@89:   function d3_selection_dataNode(data) {
paulo@89:     return {
paulo@89:       __data__: data
paulo@89:     };
paulo@89:   }
paulo@89:   d3_selectionPrototype.datum = function(value) {
paulo@89:     return arguments.length ? this.property("__data__", value) : this.property("__data__");
paulo@89:   };
paulo@89:   d3_selectionPrototype.filter = function(filter) {
paulo@89:     var subgroups = [], subgroup, group, node;
paulo@89:     if (typeof filter !== "function") filter = d3_selection_filter(filter);
paulo@89:     for (var j = 0, m = this.length; j < m; j++) {
paulo@89:       subgroups.push(subgroup = []);
paulo@89:       subgroup.parentNode = (group = this[j]).parentNode;
paulo@89:       for (var i = 0, n = group.length; i < n; i++) {
paulo@89:         if ((node = group[i]) && filter.call(node, node.__data__, i, j)) {
paulo@89:           subgroup.push(node);
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     return d3_selection(subgroups);
paulo@89:   };
paulo@89:   function d3_selection_filter(selector) {
paulo@89:     return function() {
paulo@89:       return d3_selectMatches(this, selector);
paulo@89:     };
paulo@89:   }
paulo@89:   d3_selectionPrototype.order = function() {
paulo@89:     for (var j = -1, m = this.length; ++j < m; ) {
paulo@89:       for (var group = this[j], i = group.length - 1, next = group[i], node; --i >= 0; ) {
paulo@89:         if (node = group[i]) {
paulo@89:           if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);
paulo@89:           next = node;
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     return this;
paulo@89:   };
paulo@89:   d3_selectionPrototype.sort = function(comparator) {
paulo@89:     comparator = d3_selection_sortComparator.apply(this, arguments);
paulo@89:     for (var j = -1, m = this.length; ++j < m; ) this[j].sort(comparator);
paulo@89:     return this.order();
paulo@89:   };
paulo@89:   function d3_selection_sortComparator(comparator) {
paulo@89:     if (!arguments.length) comparator = d3_ascending;
paulo@89:     return function(a, b) {
paulo@89:       return a && b ? comparator(a.__data__, b.__data__) : !a - !b;
paulo@89:     };
paulo@89:   }
paulo@89:   d3_selectionPrototype.each = function(callback) {
paulo@89:     return d3_selection_each(this, function(node, i, j) {
paulo@89:       callback.call(node, node.__data__, i, j);
paulo@89:     });
paulo@89:   };
paulo@89:   function d3_selection_each(groups, callback) {
paulo@89:     for (var j = 0, m = groups.length; j < m; j++) {
paulo@89:       for (var group = groups[j], i = 0, n = group.length, node; i < n; i++) {
paulo@89:         if (node = group[i]) callback(node, i, j);
paulo@89:       }
paulo@89:     }
paulo@89:     return groups;
paulo@89:   }
paulo@89:   d3_selectionPrototype.call = function(callback) {
paulo@89:     var args = d3_array(arguments);
paulo@89:     callback.apply(args[0] = this, args);
paulo@89:     return this;
paulo@89:   };
paulo@89:   d3_selectionPrototype.empty = function() {
paulo@89:     return !this.node();
paulo@89:   };
paulo@89:   d3_selectionPrototype.node = function() {
paulo@89:     for (var j = 0, m = this.length; j < m; j++) {
paulo@89:       for (var group = this[j], i = 0, n = group.length; i < n; i++) {
paulo@89:         var node = group[i];
paulo@89:         if (node) return node;
paulo@89:       }
paulo@89:     }
paulo@89:     return null;
paulo@89:   };
paulo@89:   d3_selectionPrototype.size = function() {
paulo@89:     var n = 0;
paulo@89:     d3_selection_each(this, function() {
paulo@89:       ++n;
paulo@89:     });
paulo@89:     return n;
paulo@89:   };
paulo@89:   function d3_selection_enter(selection) {
paulo@89:     d3_subclass(selection, d3_selection_enterPrototype);
paulo@89:     return selection;
paulo@89:   }
paulo@89:   var d3_selection_enterPrototype = [];
paulo@89:   d3.selection.enter = d3_selection_enter;
paulo@89:   d3.selection.enter.prototype = d3_selection_enterPrototype;
paulo@89:   d3_selection_enterPrototype.append = d3_selectionPrototype.append;
paulo@89:   d3_selection_enterPrototype.empty = d3_selectionPrototype.empty;
paulo@89:   d3_selection_enterPrototype.node = d3_selectionPrototype.node;
paulo@89:   d3_selection_enterPrototype.call = d3_selectionPrototype.call;
paulo@89:   d3_selection_enterPrototype.size = d3_selectionPrototype.size;
paulo@89:   d3_selection_enterPrototype.select = function(selector) {
paulo@89:     var subgroups = [], subgroup, subnode, upgroup, group, node;
paulo@89:     for (var j = -1, m = this.length; ++j < m; ) {
paulo@89:       upgroup = (group = this[j]).update;
paulo@89:       subgroups.push(subgroup = []);
paulo@89:       subgroup.parentNode = group.parentNode;
paulo@89:       for (var i = -1, n = group.length; ++i < n; ) {
paulo@89:         if (node = group[i]) {
paulo@89:           subgroup.push(upgroup[i] = subnode = selector.call(group.parentNode, node.__data__, i, j));
paulo@89:           subnode.__data__ = node.__data__;
paulo@89:         } else {
paulo@89:           subgroup.push(null);
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     return d3_selection(subgroups);
paulo@89:   };
paulo@89:   d3_selection_enterPrototype.insert = function(name, before) {
paulo@89:     if (arguments.length < 2) before = d3_selection_enterInsertBefore(this);
paulo@89:     return d3_selectionPrototype.insert.call(this, name, before);
paulo@89:   };
paulo@89:   function d3_selection_enterInsertBefore(enter) {
paulo@89:     var i0, j0;
paulo@89:     return function(d, i, j) {
paulo@89:       var group = enter[j].update, n = group.length, node;
paulo@89:       if (j != j0) j0 = j, i0 = 0;
paulo@89:       if (i >= i0) i0 = i + 1;
paulo@89:       while (!(node = group[i0]) && ++i0 < n) ;
paulo@89:       return node;
paulo@89:     };
paulo@89:   }
paulo@89:   d3.select = function(node) {
paulo@89:     var group;
paulo@89:     if (typeof node === "string") {
paulo@89:       group = [ d3_select(node, d3_document) ];
paulo@89:       group.parentNode = d3_document.documentElement;
paulo@89:     } else {
paulo@89:       group = [ node ];
paulo@89:       group.parentNode = d3_documentElement(node);
paulo@89:     }
paulo@89:     return d3_selection([ group ]);
paulo@89:   };
paulo@89:   d3.selectAll = function(nodes) {
paulo@89:     var group;
paulo@89:     if (typeof nodes === "string") {
paulo@89:       group = d3_array(d3_selectAll(nodes, d3_document));
paulo@89:       group.parentNode = d3_document.documentElement;
paulo@89:     } else {
paulo@89:       group = d3_array(nodes);
paulo@89:       group.parentNode = null;
paulo@89:     }
paulo@89:     return d3_selection([ group ]);
paulo@89:   };
paulo@89:   d3_selectionPrototype.on = function(type, listener, capture) {
paulo@89:     var n = arguments.length;
paulo@89:     if (n < 3) {
paulo@89:       if (typeof type !== "string") {
paulo@89:         if (n < 2) listener = false;
paulo@89:         for (capture in type) this.each(d3_selection_on(capture, type[capture], listener));
paulo@89:         return this;
paulo@89:       }
paulo@89:       if (n < 2) return (n = this.node()["__on" + type]) && n._;
paulo@89:       capture = false;
paulo@89:     }
paulo@89:     return this.each(d3_selection_on(type, listener, capture));
paulo@89:   };
paulo@89:   function d3_selection_on(type, listener, capture) {
paulo@89:     var name = "__on" + type, i = type.indexOf("."), wrap = d3_selection_onListener;
paulo@89:     if (i > 0) type = type.slice(0, i);
paulo@89:     var filter = d3_selection_onFilters.get(type);
paulo@89:     if (filter) type = filter, wrap = d3_selection_onFilter;
paulo@89:     function onRemove() {
paulo@89:       var l = this[name];
paulo@89:       if (l) {
paulo@89:         this.removeEventListener(type, l, l.$);
paulo@89:         delete this[name];
paulo@89:       }
paulo@89:     }
paulo@89:     function onAdd() {
paulo@89:       var l = wrap(listener, d3_array(arguments));
paulo@89:       onRemove.call(this);
paulo@89:       this.addEventListener(type, this[name] = l, l.$ = capture);
paulo@89:       l._ = listener;
paulo@89:     }
paulo@89:     function removeAll() {
paulo@89:       var re = new RegExp("^__on([^.]+)" + d3.requote(type) + "$"), match;
paulo@89:       for (var name in this) {
paulo@89:         if (match = name.match(re)) {
paulo@89:           var l = this[name];
paulo@89:           this.removeEventListener(match[1], l, l.$);
paulo@89:           delete this[name];
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     return i ? listener ? onAdd : onRemove : listener ? d3_noop : removeAll;
paulo@89:   }
paulo@89:   var d3_selection_onFilters = d3.map({
paulo@89:     mouseenter: "mouseover",
paulo@89:     mouseleave: "mouseout"
paulo@89:   });
paulo@89:   if (d3_document) {
paulo@89:     d3_selection_onFilters.forEach(function(k) {
paulo@89:       if ("on" + k in d3_document) d3_selection_onFilters.remove(k);
paulo@89:     });
paulo@89:   }
paulo@89:   function d3_selection_onListener(listener, argumentz) {
paulo@89:     return function(e) {
paulo@89:       var o = d3.event;
paulo@89:       d3.event = e;
paulo@89:       argumentz[0] = this.__data__;
paulo@89:       try {
paulo@89:         listener.apply(this, argumentz);
paulo@89:       } finally {
paulo@89:         d3.event = o;
paulo@89:       }
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_selection_onFilter(listener, argumentz) {
paulo@89:     var l = d3_selection_onListener(listener, argumentz);
paulo@89:     return function(e) {
paulo@89:       var target = this, related = e.relatedTarget;
paulo@89:       if (!related || related !== target && !(related.compareDocumentPosition(target) & 8)) {
paulo@89:         l.call(target, e);
paulo@89:       }
paulo@89:     };
paulo@89:   }
paulo@89:   var d3_event_dragSelect, d3_event_dragId = 0;
paulo@89:   function d3_event_dragSuppress(node) {
paulo@89:     var name = ".dragsuppress-" + ++d3_event_dragId, click = "click" + name, w = d3.select(d3_window(node)).on("touchmove" + name, d3_eventPreventDefault).on("dragstart" + name, d3_eventPreventDefault).on("selectstart" + name, d3_eventPreventDefault);
paulo@89:     if (d3_event_dragSelect == null) {
paulo@89:       d3_event_dragSelect = "onselectstart" in node ? false : d3_vendorSymbol(node.style, "userSelect");
paulo@89:     }
paulo@89:     if (d3_event_dragSelect) {
paulo@89:       var style = d3_documentElement(node).style, select = style[d3_event_dragSelect];
paulo@89:       style[d3_event_dragSelect] = "none";
paulo@89:     }
paulo@89:     return function(suppressClick) {
paulo@89:       w.on(name, null);
paulo@89:       if (d3_event_dragSelect) style[d3_event_dragSelect] = select;
paulo@89:       if (suppressClick) {
paulo@89:         var off = function() {
paulo@89:           w.on(click, null);
paulo@89:         };
paulo@89:         w.on(click, function() {
paulo@89:           d3_eventPreventDefault();
paulo@89:           off();
paulo@89:         }, true);
paulo@89:         setTimeout(off, 0);
paulo@89:       }
paulo@89:     };
paulo@89:   }
paulo@89:   d3.mouse = function(container) {
paulo@89:     return d3_mousePoint(container, d3_eventSource());
paulo@89:   };
paulo@89:   var d3_mouse_bug44083 = this.navigator && /WebKit/.test(this.navigator.userAgent) ? -1 : 0;
paulo@89:   function d3_mousePoint(container, e) {
paulo@89:     if (e.changedTouches) e = e.changedTouches[0];
paulo@89:     var svg = container.ownerSVGElement || container;
paulo@89:     if (svg.createSVGPoint) {
paulo@89:       var point = svg.createSVGPoint();
paulo@89:       if (d3_mouse_bug44083 < 0) {
paulo@89:         var window = d3_window(container);
paulo@89:         if (window.scrollX || window.scrollY) {
paulo@89:           svg = d3.select("body").append("svg").style({
paulo@89:             position: "absolute",
paulo@89:             top: 0,
paulo@89:             left: 0,
paulo@89:             margin: 0,
paulo@89:             padding: 0,
paulo@89:             border: "none"
paulo@89:           }, "important");
paulo@89:           var ctm = svg[0][0].getScreenCTM();
paulo@89:           d3_mouse_bug44083 = !(ctm.f || ctm.e);
paulo@89:           svg.remove();
paulo@89:         }
paulo@89:       }
paulo@89:       if (d3_mouse_bug44083) point.x = e.pageX, point.y = e.pageY; else point.x = e.clientX, 
paulo@89:       point.y = e.clientY;
paulo@89:       point = point.matrixTransform(container.getScreenCTM().inverse());
paulo@89:       return [ point.x, point.y ];
paulo@89:     }
paulo@89:     var rect = container.getBoundingClientRect();
paulo@89:     return [ e.clientX - rect.left - container.clientLeft, e.clientY - rect.top - container.clientTop ];
paulo@89:   }
paulo@89:   d3.touch = function(container, touches, identifier) {
paulo@89:     if (arguments.length < 3) identifier = touches, touches = d3_eventSource().changedTouches;
paulo@89:     if (touches) for (var i = 0, n = touches.length, touch; i < n; ++i) {
paulo@89:       if ((touch = touches[i]).identifier === identifier) {
paulo@89:         return d3_mousePoint(container, touch);
paulo@89:       }
paulo@89:     }
paulo@89:   };
paulo@89:   d3.behavior.drag = function() {
paulo@89:     var event = d3_eventDispatch(drag, "drag", "dragstart", "dragend"), origin = null, mousedown = dragstart(d3_noop, d3.mouse, d3_window, "mousemove", "mouseup"), touchstart = dragstart(d3_behavior_dragTouchId, d3.touch, d3_identity, "touchmove", "touchend");
paulo@89:     function drag() {
paulo@89:       this.on("mousedown.drag", mousedown).on("touchstart.drag", touchstart);
paulo@89:     }
paulo@89:     function dragstart(id, position, subject, move, end) {
paulo@89:       return function() {
paulo@89:         var that = this, target = d3.event.target.correspondingElement || d3.event.target, parent = that.parentNode, dispatch = event.of(that, arguments), dragged = 0, dragId = id(), dragName = ".drag" + (dragId == null ? "" : "-" + dragId), dragOffset, dragSubject = d3.select(subject(target)).on(move + dragName, moved).on(end + dragName, ended), dragRestore = d3_event_dragSuppress(target), position0 = position(parent, dragId);
paulo@89:         if (origin) {
paulo@89:           dragOffset = origin.apply(that, arguments);
paulo@89:           dragOffset = [ dragOffset.x - position0[0], dragOffset.y - position0[1] ];
paulo@89:         } else {
paulo@89:           dragOffset = [ 0, 0 ];
paulo@89:         }
paulo@89:         dispatch({
paulo@89:           type: "dragstart"
paulo@89:         });
paulo@89:         function moved() {
paulo@89:           var position1 = position(parent, dragId), dx, dy;
paulo@89:           if (!position1) return;
paulo@89:           dx = position1[0] - position0[0];
paulo@89:           dy = position1[1] - position0[1];
paulo@89:           dragged |= dx | dy;
paulo@89:           position0 = position1;
paulo@89:           dispatch({
paulo@89:             type: "drag",
paulo@89:             x: position1[0] + dragOffset[0],
paulo@89:             y: position1[1] + dragOffset[1],
paulo@89:             dx: dx,
paulo@89:             dy: dy
paulo@89:           });
paulo@89:         }
paulo@89:         function ended() {
paulo@89:           if (!position(parent, dragId)) return;
paulo@89:           dragSubject.on(move + dragName, null).on(end + dragName, null);
paulo@89:           dragRestore(dragged);
paulo@89:           dispatch({
paulo@89:             type: "dragend"
paulo@89:           });
paulo@89:         }
paulo@89:       };
paulo@89:     }
paulo@89:     drag.origin = function(x) {
paulo@89:       if (!arguments.length) return origin;
paulo@89:       origin = x;
paulo@89:       return drag;
paulo@89:     };
paulo@89:     return d3.rebind(drag, event, "on");
paulo@89:   };
paulo@89:   function d3_behavior_dragTouchId() {
paulo@89:     return d3.event.changedTouches[0].identifier;
paulo@89:   }
paulo@89:   d3.touches = function(container, touches) {
paulo@89:     if (arguments.length < 2) touches = d3_eventSource().touches;
paulo@89:     return touches ? d3_array(touches).map(function(touch) {
paulo@89:       var point = d3_mousePoint(container, touch);
paulo@89:       point.identifier = touch.identifier;
paulo@89:       return point;
paulo@89:     }) : [];
paulo@89:   };
paulo@89:   var ε = 1e-6, ε2 = ε * ε, π = Math.PI, τ = 2 * π, τε = τ - ε, halfπ = π / 2, d3_radians = π / 180, d3_degrees = 180 / π;
paulo@89:   function d3_sgn(x) {
paulo@89:     return x > 0 ? 1 : x < 0 ? -1 : 0;
paulo@89:   }
paulo@89:   function d3_cross2d(a, b, c) {
paulo@89:     return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
paulo@89:   }
paulo@89:   function d3_acos(x) {
paulo@89:     return x > 1 ? 0 : x < -1 ? π : Math.acos(x);
paulo@89:   }
paulo@89:   function d3_asin(x) {
paulo@89:     return x > 1 ? halfπ : x < -1 ? -halfπ : Math.asin(x);
paulo@89:   }
paulo@89:   function d3_sinh(x) {
paulo@89:     return ((x = Math.exp(x)) - 1 / x) / 2;
paulo@89:   }
paulo@89:   function d3_cosh(x) {
paulo@89:     return ((x = Math.exp(x)) + 1 / x) / 2;
paulo@89:   }
paulo@89:   function d3_tanh(x) {
paulo@89:     return ((x = Math.exp(2 * x)) - 1) / (x + 1);
paulo@89:   }
paulo@89:   function d3_haversin(x) {
paulo@89:     return (x = Math.sin(x / 2)) * x;
paulo@89:   }
paulo@89:   var ρ = Math.SQRT2, ρ2 = 2, ρ4 = 4;
paulo@89:   d3.interpolateZoom = function(p0, p1) {
paulo@89:     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;
paulo@89:     if (d2 < ε2) {
paulo@89:       S = Math.log(w1 / w0) / ρ;
paulo@89:       i = function(t) {
paulo@89:         return [ ux0 + t * dx, uy0 + t * dy, w0 * Math.exp(ρ * t * S) ];
paulo@89:       };
paulo@89:     } else {
paulo@89:       var d1 = Math.sqrt(d2), b0 = (w1 * w1 - w0 * w0 + ρ4 * d2) / (2 * w0 * ρ2 * d1), b1 = (w1 * w1 - w0 * w0 - ρ4 * d2) / (2 * w1 * ρ2 * d1), r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0), r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
paulo@89:       S = (r1 - r0) / ρ;
paulo@89:       i = function(t) {
paulo@89:         var s = t * S, coshr0 = d3_cosh(r0), u = w0 / (ρ2 * d1) * (coshr0 * d3_tanh(ρ * s + r0) - d3_sinh(r0));
paulo@89:         return [ ux0 + u * dx, uy0 + u * dy, w0 * coshr0 / d3_cosh(ρ * s + r0) ];
paulo@89:       };
paulo@89:     }
paulo@89:     i.duration = S * 1e3;
paulo@89:     return i;
paulo@89:   };
paulo@89:   d3.behavior.zoom = function() {
paulo@89:     var view = {
paulo@89:       x: 0,
paulo@89:       y: 0,
paulo@89:       k: 1
paulo@89:     }, translate0, center0, center, size = [ 960, 500 ], scaleExtent = d3_behavior_zoomInfinity, duration = 250, zooming = 0, mousedown = "mousedown.zoom", mousemove = "mousemove.zoom", mouseup = "mouseup.zoom", mousewheelTimer, touchstart = "touchstart.zoom", touchtime, event = d3_eventDispatch(zoom, "zoomstart", "zoom", "zoomend"), x0, x1, y0, y1;
paulo@89:     if (!d3_behavior_zoomWheel) {
paulo@89:       d3_behavior_zoomWheel = "onwheel" in d3_document ? (d3_behavior_zoomDelta = function() {
paulo@89:         return -d3.event.deltaY * (d3.event.deltaMode ? 120 : 1);
paulo@89:       }, "wheel") : "onmousewheel" in d3_document ? (d3_behavior_zoomDelta = function() {
paulo@89:         return d3.event.wheelDelta;
paulo@89:       }, "mousewheel") : (d3_behavior_zoomDelta = function() {
paulo@89:         return -d3.event.detail;
paulo@89:       }, "MozMousePixelScroll");
paulo@89:     }
paulo@89:     function zoom(g) {
paulo@89:       g.on(mousedown, mousedowned).on(d3_behavior_zoomWheel + ".zoom", mousewheeled).on("dblclick.zoom", dblclicked).on(touchstart, touchstarted);
paulo@89:     }
paulo@89:     zoom.event = function(g) {
paulo@89:       g.each(function() {
paulo@89:         var dispatch = event.of(this, arguments), view1 = view;
paulo@89:         if (d3_transitionInheritId) {
paulo@89:           d3.select(this).transition().each("start.zoom", function() {
paulo@89:             view = this.__chart__ || {
paulo@89:               x: 0,
paulo@89:               y: 0,
paulo@89:               k: 1
paulo@89:             };
paulo@89:             zoomstarted(dispatch);
paulo@89:           }).tween("zoom:zoom", function() {
paulo@89:             var dx = size[0], dy = size[1], cx = center0 ? center0[0] : dx / 2, cy = center0 ? center0[1] : dy / 2, i = d3.interpolateZoom([ (cx - view.x) / view.k, (cy - view.y) / view.k, dx / view.k ], [ (cx - view1.x) / view1.k, (cy - view1.y) / view1.k, dx / view1.k ]);
paulo@89:             return function(t) {
paulo@89:               var l = i(t), k = dx / l[2];
paulo@89:               this.__chart__ = view = {
paulo@89:                 x: cx - l[0] * k,
paulo@89:                 y: cy - l[1] * k,
paulo@89:                 k: k
paulo@89:               };
paulo@89:               zoomed(dispatch);
paulo@89:             };
paulo@89:           }).each("interrupt.zoom", function() {
paulo@89:             zoomended(dispatch);
paulo@89:           }).each("end.zoom", function() {
paulo@89:             zoomended(dispatch);
paulo@89:           });
paulo@89:         } else {
paulo@89:           this.__chart__ = view;
paulo@89:           zoomstarted(dispatch);
paulo@89:           zoomed(dispatch);
paulo@89:           zoomended(dispatch);
paulo@89:         }
paulo@89:       });
paulo@89:     };
paulo@89:     zoom.translate = function(_) {
paulo@89:       if (!arguments.length) return [ view.x, view.y ];
paulo@89:       view = {
paulo@89:         x: +_[0],
paulo@89:         y: +_[1],
paulo@89:         k: view.k
paulo@89:       };
paulo@89:       rescale();
paulo@89:       return zoom;
paulo@89:     };
paulo@89:     zoom.scale = function(_) {
paulo@89:       if (!arguments.length) return view.k;
paulo@89:       view = {
paulo@89:         x: view.x,
paulo@89:         y: view.y,
paulo@89:         k: null
paulo@89:       };
paulo@89:       scaleTo(+_);
paulo@89:       rescale();
paulo@89:       return zoom;
paulo@89:     };
paulo@89:     zoom.scaleExtent = function(_) {
paulo@89:       if (!arguments.length) return scaleExtent;
paulo@89:       scaleExtent = _ == null ? d3_behavior_zoomInfinity : [ +_[0], +_[1] ];
paulo@89:       return zoom;
paulo@89:     };
paulo@89:     zoom.center = function(_) {
paulo@89:       if (!arguments.length) return center;
paulo@89:       center = _ && [ +_[0], +_[1] ];
paulo@89:       return zoom;
paulo@89:     };
paulo@89:     zoom.size = function(_) {
paulo@89:       if (!arguments.length) return size;
paulo@89:       size = _ && [ +_[0], +_[1] ];
paulo@89:       return zoom;
paulo@89:     };
paulo@89:     zoom.duration = function(_) {
paulo@89:       if (!arguments.length) return duration;
paulo@89:       duration = +_;
paulo@89:       return zoom;
paulo@89:     };
paulo@89:     zoom.x = function(z) {
paulo@89:       if (!arguments.length) return x1;
paulo@89:       x1 = z;
paulo@89:       x0 = z.copy();
paulo@89:       view = {
paulo@89:         x: 0,
paulo@89:         y: 0,
paulo@89:         k: 1
paulo@89:       };
paulo@89:       return zoom;
paulo@89:     };
paulo@89:     zoom.y = function(z) {
paulo@89:       if (!arguments.length) return y1;
paulo@89:       y1 = z;
paulo@89:       y0 = z.copy();
paulo@89:       view = {
paulo@89:         x: 0,
paulo@89:         y: 0,
paulo@89:         k: 1
paulo@89:       };
paulo@89:       return zoom;
paulo@89:     };
paulo@89:     function location(p) {
paulo@89:       return [ (p[0] - view.x) / view.k, (p[1] - view.y) / view.k ];
paulo@89:     }
paulo@89:     function point(l) {
paulo@89:       return [ l[0] * view.k + view.x, l[1] * view.k + view.y ];
paulo@89:     }
paulo@89:     function scaleTo(s) {
paulo@89:       view.k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], s));
paulo@89:     }
paulo@89:     function translateTo(p, l) {
paulo@89:       l = point(l);
paulo@89:       view.x += p[0] - l[0];
paulo@89:       view.y += p[1] - l[1];
paulo@89:     }
paulo@89:     function zoomTo(that, p, l, k) {
paulo@89:       that.__chart__ = {
paulo@89:         x: view.x,
paulo@89:         y: view.y,
paulo@89:         k: view.k
paulo@89:       };
paulo@89:       scaleTo(Math.pow(2, k));
paulo@89:       translateTo(center0 = p, l);
paulo@89:       that = d3.select(that);
paulo@89:       if (duration > 0) that = that.transition().duration(duration);
paulo@89:       that.call(zoom.event);
paulo@89:     }
paulo@89:     function rescale() {
paulo@89:       if (x1) x1.domain(x0.range().map(function(x) {
paulo@89:         return (x - view.x) / view.k;
paulo@89:       }).map(x0.invert));
paulo@89:       if (y1) y1.domain(y0.range().map(function(y) {
paulo@89:         return (y - view.y) / view.k;
paulo@89:       }).map(y0.invert));
paulo@89:     }
paulo@89:     function zoomstarted(dispatch) {
paulo@89:       if (!zooming++) dispatch({
paulo@89:         type: "zoomstart"
paulo@89:       });
paulo@89:     }
paulo@89:     function zoomed(dispatch) {
paulo@89:       rescale();
paulo@89:       dispatch({
paulo@89:         type: "zoom",
paulo@89:         scale: view.k,
paulo@89:         translate: [ view.x, view.y ]
paulo@89:       });
paulo@89:     }
paulo@89:     function zoomended(dispatch) {
paulo@89:       if (!--zooming) dispatch({
paulo@89:         type: "zoomend"
paulo@89:       }), center0 = null;
paulo@89:     }
paulo@89:     function mousedowned() {
paulo@89:       var that = this, dispatch = event.of(that, arguments), dragged = 0, subject = d3.select(d3_window(that)).on(mousemove, moved).on(mouseup, ended), location0 = location(d3.mouse(that)), dragRestore = d3_event_dragSuppress(that);
paulo@89:       d3_selection_interrupt.call(that);
paulo@89:       zoomstarted(dispatch);
paulo@89:       function moved() {
paulo@89:         dragged = 1;
paulo@89:         translateTo(d3.mouse(that), location0);
paulo@89:         zoomed(dispatch);
paulo@89:       }
paulo@89:       function ended() {
paulo@89:         subject.on(mousemove, null).on(mouseup, null);
paulo@89:         dragRestore(dragged);
paulo@89:         zoomended(dispatch);
paulo@89:       }
paulo@89:     }
paulo@89:     function touchstarted() {
paulo@89:       var that = this, dispatch = event.of(that, arguments), locations0 = {}, distance0 = 0, scale0, zoomName = ".zoom-" + d3.event.changedTouches[0].identifier, touchmove = "touchmove" + zoomName, touchend = "touchend" + zoomName, targets = [], subject = d3.select(that), dragRestore = d3_event_dragSuppress(that);
paulo@89:       started();
paulo@89:       zoomstarted(dispatch);
paulo@89:       subject.on(mousedown, null).on(touchstart, started);
paulo@89:       function relocate() {
paulo@89:         var touches = d3.touches(that);
paulo@89:         scale0 = view.k;
paulo@89:         touches.forEach(function(t) {
paulo@89:           if (t.identifier in locations0) locations0[t.identifier] = location(t);
paulo@89:         });
paulo@89:         return touches;
paulo@89:       }
paulo@89:       function started() {
paulo@89:         var target = d3.event.target;
paulo@89:         d3.select(target).on(touchmove, moved).on(touchend, ended);
paulo@89:         targets.push(target);
paulo@89:         var changed = d3.event.changedTouches;
paulo@89:         for (var i = 0, n = changed.length; i < n; ++i) {
paulo@89:           locations0[changed[i].identifier] = null;
paulo@89:         }
paulo@89:         var touches = relocate(), now = Date.now();
paulo@89:         if (touches.length === 1) {
paulo@89:           if (now - touchtime < 500) {
paulo@89:             var p = touches[0];
paulo@89:             zoomTo(that, p, locations0[p.identifier], Math.floor(Math.log(view.k) / Math.LN2) + 1);
paulo@89:             d3_eventPreventDefault();
paulo@89:           }
paulo@89:           touchtime = now;
paulo@89:         } else if (touches.length > 1) {
paulo@89:           var p = touches[0], q = touches[1], dx = p[0] - q[0], dy = p[1] - q[1];
paulo@89:           distance0 = dx * dx + dy * dy;
paulo@89:         }
paulo@89:       }
paulo@89:       function moved() {
paulo@89:         var touches = d3.touches(that), p0, l0, p1, l1;
paulo@89:         d3_selection_interrupt.call(that);
paulo@89:         for (var i = 0, n = touches.length; i < n; ++i, l1 = null) {
paulo@89:           p1 = touches[i];
paulo@89:           if (l1 = locations0[p1.identifier]) {
paulo@89:             if (l0) break;
paulo@89:             p0 = p1, l0 = l1;
paulo@89:           }
paulo@89:         }
paulo@89:         if (l1) {
paulo@89:           var distance1 = (distance1 = p1[0] - p0[0]) * distance1 + (distance1 = p1[1] - p0[1]) * distance1, scale1 = distance0 && Math.sqrt(distance1 / distance0);
paulo@89:           p0 = [ (p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2 ];
paulo@89:           l0 = [ (l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2 ];
paulo@89:           scaleTo(scale1 * scale0);
paulo@89:         }
paulo@89:         touchtime = null;
paulo@89:         translateTo(p0, l0);
paulo@89:         zoomed(dispatch);
paulo@89:       }
paulo@89:       function ended() {
paulo@89:         if (d3.event.touches.length) {
paulo@89:           var changed = d3.event.changedTouches;
paulo@89:           for (var i = 0, n = changed.length; i < n; ++i) {
paulo@89:             delete locations0[changed[i].identifier];
paulo@89:           }
paulo@89:           for (var identifier in locations0) {
paulo@89:             return void relocate();
paulo@89:           }
paulo@89:         }
paulo@89:         d3.selectAll(targets).on(zoomName, null);
paulo@89:         subject.on(mousedown, mousedowned).on(touchstart, touchstarted);
paulo@89:         dragRestore();
paulo@89:         zoomended(dispatch);
paulo@89:       }
paulo@89:     }
paulo@89:     function mousewheeled() {
paulo@89:       var dispatch = event.of(this, arguments);
paulo@89:       if (mousewheelTimer) clearTimeout(mousewheelTimer); else d3_selection_interrupt.call(this), 
paulo@89:       translate0 = location(center0 = center || d3.mouse(this)), zoomstarted(dispatch);
paulo@89:       mousewheelTimer = setTimeout(function() {
paulo@89:         mousewheelTimer = null;
paulo@89:         zoomended(dispatch);
paulo@89:       }, 50);
paulo@89:       d3_eventPreventDefault();
paulo@89:       scaleTo(Math.pow(2, d3_behavior_zoomDelta() * .002) * view.k);
paulo@89:       translateTo(center0, translate0);
paulo@89:       zoomed(dispatch);
paulo@89:     }
paulo@89:     function dblclicked() {
paulo@89:       var p = d3.mouse(this), k = Math.log(view.k) / Math.LN2;
paulo@89:       zoomTo(this, p, location(p), d3.event.shiftKey ? Math.ceil(k) - 1 : Math.floor(k) + 1);
paulo@89:     }
paulo@89:     return d3.rebind(zoom, event, "on");
paulo@89:   };
paulo@89:   var d3_behavior_zoomInfinity = [ 0, Infinity ], d3_behavior_zoomDelta, d3_behavior_zoomWheel;
paulo@89:   d3.color = d3_color;
paulo@89:   function d3_color() {}
paulo@89:   d3_color.prototype.toString = function() {
paulo@89:     return this.rgb() + "";
paulo@89:   };
paulo@89:   d3.hsl = d3_hsl;
paulo@89:   function d3_hsl(h, s, l) {
paulo@89:     return this instanceof d3_hsl ? void (this.h = +h, this.s = +s, this.l = +l) : arguments.length < 2 ? h instanceof d3_hsl ? new d3_hsl(h.h, h.s, h.l) : d3_rgb_parse("" + h, d3_rgb_hsl, d3_hsl) : new d3_hsl(h, s, l);
paulo@89:   }
paulo@89:   var d3_hslPrototype = d3_hsl.prototype = new d3_color();
paulo@89:   d3_hslPrototype.brighter = function(k) {
paulo@89:     k = Math.pow(.7, arguments.length ? k : 1);
paulo@89:     return new d3_hsl(this.h, this.s, this.l / k);
paulo@89:   };
paulo@89:   d3_hslPrototype.darker = function(k) {
paulo@89:     k = Math.pow(.7, arguments.length ? k : 1);
paulo@89:     return new d3_hsl(this.h, this.s, k * this.l);
paulo@89:   };
paulo@89:   d3_hslPrototype.rgb = function() {
paulo@89:     return d3_hsl_rgb(this.h, this.s, this.l);
paulo@89:   };
paulo@89:   function d3_hsl_rgb(h, s, l) {
paulo@89:     var m1, m2;
paulo@89:     h = isNaN(h) ? 0 : (h %= 360) < 0 ? h + 360 : h;
paulo@89:     s = isNaN(s) ? 0 : s < 0 ? 0 : s > 1 ? 1 : s;
paulo@89:     l = l < 0 ? 0 : l > 1 ? 1 : l;
paulo@89:     m2 = l <= .5 ? l * (1 + s) : l + s - l * s;
paulo@89:     m1 = 2 * l - m2;
paulo@89:     function v(h) {
paulo@89:       if (h > 360) h -= 360; else if (h < 0) h += 360;
paulo@89:       if (h < 60) return m1 + (m2 - m1) * h / 60;
paulo@89:       if (h < 180) return m2;
paulo@89:       if (h < 240) return m1 + (m2 - m1) * (240 - h) / 60;
paulo@89:       return m1;
paulo@89:     }
paulo@89:     function vv(h) {
paulo@89:       return Math.round(v(h) * 255);
paulo@89:     }
paulo@89:     return new d3_rgb(vv(h + 120), vv(h), vv(h - 120));
paulo@89:   }
paulo@89:   d3.hcl = d3_hcl;
paulo@89:   function d3_hcl(h, c, l) {
paulo@89:     return this instanceof d3_hcl ? void (this.h = +h, this.c = +c, this.l = +l) : arguments.length < 2 ? h instanceof d3_hcl ? new d3_hcl(h.h, h.c, h.l) : h instanceof d3_lab ? d3_lab_hcl(h.l, h.a, h.b) : d3_lab_hcl((h = d3_rgb_lab((h = d3.rgb(h)).r, h.g, h.b)).l, h.a, h.b) : new d3_hcl(h, c, l);
paulo@89:   }
paulo@89:   var d3_hclPrototype = d3_hcl.prototype = new d3_color();
paulo@89:   d3_hclPrototype.brighter = function(k) {
paulo@89:     return new d3_hcl(this.h, this.c, Math.min(100, this.l + d3_lab_K * (arguments.length ? k : 1)));
paulo@89:   };
paulo@89:   d3_hclPrototype.darker = function(k) {
paulo@89:     return new d3_hcl(this.h, this.c, Math.max(0, this.l - d3_lab_K * (arguments.length ? k : 1)));
paulo@89:   };
paulo@89:   d3_hclPrototype.rgb = function() {
paulo@89:     return d3_hcl_lab(this.h, this.c, this.l).rgb();
paulo@89:   };
paulo@89:   function d3_hcl_lab(h, c, l) {
paulo@89:     if (isNaN(h)) h = 0;
paulo@89:     if (isNaN(c)) c = 0;
paulo@89:     return new d3_lab(l, Math.cos(h *= d3_radians) * c, Math.sin(h) * c);
paulo@89:   }
paulo@89:   d3.lab = d3_lab;
paulo@89:   function d3_lab(l, a, b) {
paulo@89:     return this instanceof d3_lab ? void (this.l = +l, this.a = +a, this.b = +b) : arguments.length < 2 ? l instanceof d3_lab ? new d3_lab(l.l, l.a, l.b) : l instanceof d3_hcl ? d3_hcl_lab(l.h, l.c, l.l) : d3_rgb_lab((l = d3_rgb(l)).r, l.g, l.b) : new d3_lab(l, a, b);
paulo@89:   }
paulo@89:   var d3_lab_K = 18;
paulo@89:   var d3_lab_X = .95047, d3_lab_Y = 1, d3_lab_Z = 1.08883;
paulo@89:   var d3_labPrototype = d3_lab.prototype = new d3_color();
paulo@89:   d3_labPrototype.brighter = function(k) {
paulo@89:     return new d3_lab(Math.min(100, this.l + d3_lab_K * (arguments.length ? k : 1)), this.a, this.b);
paulo@89:   };
paulo@89:   d3_labPrototype.darker = function(k) {
paulo@89:     return new d3_lab(Math.max(0, this.l - d3_lab_K * (arguments.length ? k : 1)), this.a, this.b);
paulo@89:   };
paulo@89:   d3_labPrototype.rgb = function() {
paulo@89:     return d3_lab_rgb(this.l, this.a, this.b);
paulo@89:   };
paulo@89:   function d3_lab_rgb(l, a, b) {
paulo@89:     var y = (l + 16) / 116, x = y + a / 500, z = y - b / 200;
paulo@89:     x = d3_lab_xyz(x) * d3_lab_X;
paulo@89:     y = d3_lab_xyz(y) * d3_lab_Y;
paulo@89:     z = d3_lab_xyz(z) * d3_lab_Z;
paulo@89:     return new d3_rgb(d3_xyz_rgb(3.2404542 * x - 1.5371385 * y - .4985314 * z), d3_xyz_rgb(-.969266 * x + 1.8760108 * y + .041556 * z), d3_xyz_rgb(.0556434 * x - .2040259 * y + 1.0572252 * z));
paulo@89:   }
paulo@89:   function d3_lab_hcl(l, a, b) {
paulo@89:     return l > 0 ? new d3_hcl(Math.atan2(b, a) * d3_degrees, Math.sqrt(a * a + b * b), l) : new d3_hcl(NaN, NaN, l);
paulo@89:   }
paulo@89:   function d3_lab_xyz(x) {
paulo@89:     return x > .206893034 ? x * x * x : (x - 4 / 29) / 7.787037;
paulo@89:   }
paulo@89:   function d3_xyz_lab(x) {
paulo@89:     return x > .008856 ? Math.pow(x, 1 / 3) : 7.787037 * x + 4 / 29;
paulo@89:   }
paulo@89:   function d3_xyz_rgb(r) {
paulo@89:     return Math.round(255 * (r <= .00304 ? 12.92 * r : 1.055 * Math.pow(r, 1 / 2.4) - .055));
paulo@89:   }
paulo@89:   d3.rgb = d3_rgb;
paulo@89:   function d3_rgb(r, g, b) {
paulo@89:     return this instanceof d3_rgb ? void (this.r = ~~r, this.g = ~~g, this.b = ~~b) : arguments.length < 2 ? r instanceof d3_rgb ? new d3_rgb(r.r, r.g, r.b) : d3_rgb_parse("" + r, d3_rgb, d3_hsl_rgb) : new d3_rgb(r, g, b);
paulo@89:   }
paulo@89:   function d3_rgbNumber(value) {
paulo@89:     return new d3_rgb(value >> 16, value >> 8 & 255, value & 255);
paulo@89:   }
paulo@89:   function d3_rgbString(value) {
paulo@89:     return d3_rgbNumber(value) + "";
paulo@89:   }
paulo@89:   var d3_rgbPrototype = d3_rgb.prototype = new d3_color();
paulo@89:   d3_rgbPrototype.brighter = function(k) {
paulo@89:     k = Math.pow(.7, arguments.length ? k : 1);
paulo@89:     var r = this.r, g = this.g, b = this.b, i = 30;
paulo@89:     if (!r && !g && !b) return new d3_rgb(i, i, i);
paulo@89:     if (r && r < i) r = i;
paulo@89:     if (g && g < i) g = i;
paulo@89:     if (b && b < i) b = i;
paulo@89:     return new d3_rgb(Math.min(255, r / k), Math.min(255, g / k), Math.min(255, b / k));
paulo@89:   };
paulo@89:   d3_rgbPrototype.darker = function(k) {
paulo@89:     k = Math.pow(.7, arguments.length ? k : 1);
paulo@89:     return new d3_rgb(k * this.r, k * this.g, k * this.b);
paulo@89:   };
paulo@89:   d3_rgbPrototype.hsl = function() {
paulo@89:     return d3_rgb_hsl(this.r, this.g, this.b);
paulo@89:   };
paulo@89:   d3_rgbPrototype.toString = function() {
paulo@89:     return "#" + d3_rgb_hex(this.r) + d3_rgb_hex(this.g) + d3_rgb_hex(this.b);
paulo@89:   };
paulo@89:   function d3_rgb_hex(v) {
paulo@89:     return v < 16 ? "0" + Math.max(0, v).toString(16) : Math.min(255, v).toString(16);
paulo@89:   }
paulo@89:   function d3_rgb_parse(format, rgb, hsl) {
paulo@89:     var r = 0, g = 0, b = 0, m1, m2, color;
paulo@89:     m1 = /([a-z]+)\((.*)\)/.exec(format = format.toLowerCase());
paulo@89:     if (m1) {
paulo@89:       m2 = m1[2].split(",");
paulo@89:       switch (m1[1]) {
paulo@89:        case "hsl":
paulo@89:         {
paulo@89:           return hsl(parseFloat(m2[0]), parseFloat(m2[1]) / 100, parseFloat(m2[2]) / 100);
paulo@89:         }
paulo@89: 
paulo@89:        case "rgb":
paulo@89:         {
paulo@89:           return rgb(d3_rgb_parseNumber(m2[0]), d3_rgb_parseNumber(m2[1]), d3_rgb_parseNumber(m2[2]));
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     if (color = d3_rgb_names.get(format)) {
paulo@89:       return rgb(color.r, color.g, color.b);
paulo@89:     }
paulo@89:     if (format != null && format.charAt(0) === "#" && !isNaN(color = parseInt(format.slice(1), 16))) {
paulo@89:       if (format.length === 4) {
paulo@89:         r = (color & 3840) >> 4;
paulo@89:         r = r >> 4 | r;
paulo@89:         g = color & 240;
paulo@89:         g = g >> 4 | g;
paulo@89:         b = color & 15;
paulo@89:         b = b << 4 | b;
paulo@89:       } else if (format.length === 7) {
paulo@89:         r = (color & 16711680) >> 16;
paulo@89:         g = (color & 65280) >> 8;
paulo@89:         b = color & 255;
paulo@89:       }
paulo@89:     }
paulo@89:     return rgb(r, g, b);
paulo@89:   }
paulo@89:   function d3_rgb_hsl(r, g, b) {
paulo@89:     var min = Math.min(r /= 255, g /= 255, b /= 255), max = Math.max(r, g, b), d = max - min, h, s, l = (max + min) / 2;
paulo@89:     if (d) {
paulo@89:       s = l < .5 ? d / (max + min) : d / (2 - max - min);
paulo@89:       if (r == max) h = (g - b) / d + (g < b ? 6 : 0); else if (g == max) h = (b - r) / d + 2; else h = (r - g) / d + 4;
paulo@89:       h *= 60;
paulo@89:     } else {
paulo@89:       h = NaN;
paulo@89:       s = l > 0 && l < 1 ? 0 : h;
paulo@89:     }
paulo@89:     return new d3_hsl(h, s, l);
paulo@89:   }
paulo@89:   function d3_rgb_lab(r, g, b) {
paulo@89:     r = d3_rgb_xyz(r);
paulo@89:     g = d3_rgb_xyz(g);
paulo@89:     b = d3_rgb_xyz(b);
paulo@89:     var x = d3_xyz_lab((.4124564 * r + .3575761 * g + .1804375 * b) / d3_lab_X), y = d3_xyz_lab((.2126729 * r + .7151522 * g + .072175 * b) / d3_lab_Y), z = d3_xyz_lab((.0193339 * r + .119192 * g + .9503041 * b) / d3_lab_Z);
paulo@89:     return d3_lab(116 * y - 16, 500 * (x - y), 200 * (y - z));
paulo@89:   }
paulo@89:   function d3_rgb_xyz(r) {
paulo@89:     return (r /= 255) <= .04045 ? r / 12.92 : Math.pow((r + .055) / 1.055, 2.4);
paulo@89:   }
paulo@89:   function d3_rgb_parseNumber(c) {
paulo@89:     var f = parseFloat(c);
paulo@89:     return c.charAt(c.length - 1) === "%" ? Math.round(f * 2.55) : f;
paulo@89:   }
paulo@89:   var d3_rgb_names = d3.map({
paulo@89:     aliceblue: 15792383,
paulo@89:     antiquewhite: 16444375,
paulo@89:     aqua: 65535,
paulo@89:     aquamarine: 8388564,
paulo@89:     azure: 15794175,
paulo@89:     beige: 16119260,
paulo@89:     bisque: 16770244,
paulo@89:     black: 0,
paulo@89:     blanchedalmond: 16772045,
paulo@89:     blue: 255,
paulo@89:     blueviolet: 9055202,
paulo@89:     brown: 10824234,
paulo@89:     burlywood: 14596231,
paulo@89:     cadetblue: 6266528,
paulo@89:     chartreuse: 8388352,
paulo@89:     chocolate: 13789470,
paulo@89:     coral: 16744272,
paulo@89:     cornflowerblue: 6591981,
paulo@89:     cornsilk: 16775388,
paulo@89:     crimson: 14423100,
paulo@89:     cyan: 65535,
paulo@89:     darkblue: 139,
paulo@89:     darkcyan: 35723,
paulo@89:     darkgoldenrod: 12092939,
paulo@89:     darkgray: 11119017,
paulo@89:     darkgreen: 25600,
paulo@89:     darkgrey: 11119017,
paulo@89:     darkkhaki: 12433259,
paulo@89:     darkmagenta: 9109643,
paulo@89:     darkolivegreen: 5597999,
paulo@89:     darkorange: 16747520,
paulo@89:     darkorchid: 10040012,
paulo@89:     darkred: 9109504,
paulo@89:     darksalmon: 15308410,
paulo@89:     darkseagreen: 9419919,
paulo@89:     darkslateblue: 4734347,
paulo@89:     darkslategray: 3100495,
paulo@89:     darkslategrey: 3100495,
paulo@89:     darkturquoise: 52945,
paulo@89:     darkviolet: 9699539,
paulo@89:     deeppink: 16716947,
paulo@89:     deepskyblue: 49151,
paulo@89:     dimgray: 6908265,
paulo@89:     dimgrey: 6908265,
paulo@89:     dodgerblue: 2003199,
paulo@89:     firebrick: 11674146,
paulo@89:     floralwhite: 16775920,
paulo@89:     forestgreen: 2263842,
paulo@89:     fuchsia: 16711935,
paulo@89:     gainsboro: 14474460,
paulo@89:     ghostwhite: 16316671,
paulo@89:     gold: 16766720,
paulo@89:     goldenrod: 14329120,
paulo@89:     gray: 8421504,
paulo@89:     green: 32768,
paulo@89:     greenyellow: 11403055,
paulo@89:     grey: 8421504,
paulo@89:     honeydew: 15794160,
paulo@89:     hotpink: 16738740,
paulo@89:     indianred: 13458524,
paulo@89:     indigo: 4915330,
paulo@89:     ivory: 16777200,
paulo@89:     khaki: 15787660,
paulo@89:     lavender: 15132410,
paulo@89:     lavenderblush: 16773365,
paulo@89:     lawngreen: 8190976,
paulo@89:     lemonchiffon: 16775885,
paulo@89:     lightblue: 11393254,
paulo@89:     lightcoral: 15761536,
paulo@89:     lightcyan: 14745599,
paulo@89:     lightgoldenrodyellow: 16448210,
paulo@89:     lightgray: 13882323,
paulo@89:     lightgreen: 9498256,
paulo@89:     lightgrey: 13882323,
paulo@89:     lightpink: 16758465,
paulo@89:     lightsalmon: 16752762,
paulo@89:     lightseagreen: 2142890,
paulo@89:     lightskyblue: 8900346,
paulo@89:     lightslategray: 7833753,
paulo@89:     lightslategrey: 7833753,
paulo@89:     lightsteelblue: 11584734,
paulo@89:     lightyellow: 16777184,
paulo@89:     lime: 65280,
paulo@89:     limegreen: 3329330,
paulo@89:     linen: 16445670,
paulo@89:     magenta: 16711935,
paulo@89:     maroon: 8388608,
paulo@89:     mediumaquamarine: 6737322,
paulo@89:     mediumblue: 205,
paulo@89:     mediumorchid: 12211667,
paulo@89:     mediumpurple: 9662683,
paulo@89:     mediumseagreen: 3978097,
paulo@89:     mediumslateblue: 8087790,
paulo@89:     mediumspringgreen: 64154,
paulo@89:     mediumturquoise: 4772300,
paulo@89:     mediumvioletred: 13047173,
paulo@89:     midnightblue: 1644912,
paulo@89:     mintcream: 16121850,
paulo@89:     mistyrose: 16770273,
paulo@89:     moccasin: 16770229,
paulo@89:     navajowhite: 16768685,
paulo@89:     navy: 128,
paulo@89:     oldlace: 16643558,
paulo@89:     olive: 8421376,
paulo@89:     olivedrab: 7048739,
paulo@89:     orange: 16753920,
paulo@89:     orangered: 16729344,
paulo@89:     orchid: 14315734,
paulo@89:     palegoldenrod: 15657130,
paulo@89:     palegreen: 10025880,
paulo@89:     paleturquoise: 11529966,
paulo@89:     palevioletred: 14381203,
paulo@89:     papayawhip: 16773077,
paulo@89:     peachpuff: 16767673,
paulo@89:     peru: 13468991,
paulo@89:     pink: 16761035,
paulo@89:     plum: 14524637,
paulo@89:     powderblue: 11591910,
paulo@89:     purple: 8388736,
paulo@89:     rebeccapurple: 6697881,
paulo@89:     red: 16711680,
paulo@89:     rosybrown: 12357519,
paulo@89:     royalblue: 4286945,
paulo@89:     saddlebrown: 9127187,
paulo@89:     salmon: 16416882,
paulo@89:     sandybrown: 16032864,
paulo@89:     seagreen: 3050327,
paulo@89:     seashell: 16774638,
paulo@89:     sienna: 10506797,
paulo@89:     silver: 12632256,
paulo@89:     skyblue: 8900331,
paulo@89:     slateblue: 6970061,
paulo@89:     slategray: 7372944,
paulo@89:     slategrey: 7372944,
paulo@89:     snow: 16775930,
paulo@89:     springgreen: 65407,
paulo@89:     steelblue: 4620980,
paulo@89:     tan: 13808780,
paulo@89:     teal: 32896,
paulo@89:     thistle: 14204888,
paulo@89:     tomato: 16737095,
paulo@89:     turquoise: 4251856,
paulo@89:     violet: 15631086,
paulo@89:     wheat: 16113331,
paulo@89:     white: 16777215,
paulo@89:     whitesmoke: 16119285,
paulo@89:     yellow: 16776960,
paulo@89:     yellowgreen: 10145074
paulo@89:   });
paulo@89:   d3_rgb_names.forEach(function(key, value) {
paulo@89:     d3_rgb_names.set(key, d3_rgbNumber(value));
paulo@89:   });
paulo@89:   function d3_functor(v) {
paulo@89:     return typeof v === "function" ? v : function() {
paulo@89:       return v;
paulo@89:     };
paulo@89:   }
paulo@89:   d3.functor = d3_functor;
paulo@89:   d3.xhr = d3_xhrType(d3_identity);
paulo@89:   function d3_xhrType(response) {
paulo@89:     return function(url, mimeType, callback) {
paulo@89:       if (arguments.length === 2 && typeof mimeType === "function") callback = mimeType, 
paulo@89:       mimeType = null;
paulo@89:       return d3_xhr(url, mimeType, response, callback);
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_xhr(url, mimeType, response, callback) {
paulo@89:     var xhr = {}, dispatch = d3.dispatch("beforesend", "progress", "load", "error"), headers = {}, request = new XMLHttpRequest(), responseType = null;
paulo@89:     if (this.XDomainRequest && !("withCredentials" in request) && /^(http(s)?:)?\/\//.test(url)) request = new XDomainRequest();
paulo@89:     "onload" in request ? request.onload = request.onerror = respond : request.onreadystatechange = function() {
paulo@89:       request.readyState > 3 && respond();
paulo@89:     };
paulo@89:     function respond() {
paulo@89:       var status = request.status, result;
paulo@89:       if (!status && d3_xhrHasResponse(request) || status >= 200 && status < 300 || status === 304) {
paulo@89:         try {
paulo@89:           result = response.call(xhr, request);
paulo@89:         } catch (e) {
paulo@89:           dispatch.error.call(xhr, e);
paulo@89:           return;
paulo@89:         }
paulo@89:         dispatch.load.call(xhr, result);
paulo@89:       } else {
paulo@89:         dispatch.error.call(xhr, request);
paulo@89:       }
paulo@89:     }
paulo@89:     request.onprogress = function(event) {
paulo@89:       var o = d3.event;
paulo@89:       d3.event = event;
paulo@89:       try {
paulo@89:         dispatch.progress.call(xhr, request);
paulo@89:       } finally {
paulo@89:         d3.event = o;
paulo@89:       }
paulo@89:     };
paulo@89:     xhr.header = function(name, value) {
paulo@89:       name = (name + "").toLowerCase();
paulo@89:       if (arguments.length < 2) return headers[name];
paulo@89:       if (value == null) delete headers[name]; else headers[name] = value + "";
paulo@89:       return xhr;
paulo@89:     };
paulo@89:     xhr.mimeType = function(value) {
paulo@89:       if (!arguments.length) return mimeType;
paulo@89:       mimeType = value == null ? null : value + "";
paulo@89:       return xhr;
paulo@89:     };
paulo@89:     xhr.responseType = function(value) {
paulo@89:       if (!arguments.length) return responseType;
paulo@89:       responseType = value;
paulo@89:       return xhr;
paulo@89:     };
paulo@89:     xhr.response = function(value) {
paulo@89:       response = value;
paulo@89:       return xhr;
paulo@89:     };
paulo@89:     [ "get", "post" ].forEach(function(method) {
paulo@89:       xhr[method] = function() {
paulo@89:         return xhr.send.apply(xhr, [ method ].concat(d3_array(arguments)));
paulo@89:       };
paulo@89:     });
paulo@89:     xhr.send = function(method, data, callback) {
paulo@89:       if (arguments.length === 2 && typeof data === "function") callback = data, data = null;
paulo@89:       request.open(method, url, true);
paulo@89:       if (mimeType != null && !("accept" in headers)) headers["accept"] = mimeType + ",*/*";
paulo@89:       if (request.setRequestHeader) for (var name in headers) request.setRequestHeader(name, headers[name]);
paulo@89:       if (mimeType != null && request.overrideMimeType) request.overrideMimeType(mimeType);
paulo@89:       if (responseType != null) request.responseType = responseType;
paulo@89:       if (callback != null) xhr.on("error", callback).on("load", function(request) {
paulo@89:         callback(null, request);
paulo@89:       });
paulo@89:       dispatch.beforesend.call(xhr, request);
paulo@89:       request.send(data == null ? null : data);
paulo@89:       return xhr;
paulo@89:     };
paulo@89:     xhr.abort = function() {
paulo@89:       request.abort();
paulo@89:       return xhr;
paulo@89:     };
paulo@89:     d3.rebind(xhr, dispatch, "on");
paulo@89:     return callback == null ? xhr : xhr.get(d3_xhr_fixCallback(callback));
paulo@89:   }
paulo@89:   function d3_xhr_fixCallback(callback) {
paulo@89:     return callback.length === 1 ? function(error, request) {
paulo@89:       callback(error == null ? request : null);
paulo@89:     } : callback;
paulo@89:   }
paulo@89:   function d3_xhrHasResponse(request) {
paulo@89:     var type = request.responseType;
paulo@89:     return type && type !== "text" ? request.response : request.responseText;
paulo@89:   }
paulo@89:   d3.dsv = function(delimiter, mimeType) {
paulo@89:     var reFormat = new RegExp('["' + delimiter + "\n]"), delimiterCode = delimiter.charCodeAt(0);
paulo@89:     function dsv(url, row, callback) {
paulo@89:       if (arguments.length < 3) callback = row, row = null;
paulo@89:       var xhr = d3_xhr(url, mimeType, row == null ? response : typedResponse(row), callback);
paulo@89:       xhr.row = function(_) {
paulo@89:         return arguments.length ? xhr.response((row = _) == null ? response : typedResponse(_)) : row;
paulo@89:       };
paulo@89:       return xhr;
paulo@89:     }
paulo@89:     function response(request) {
paulo@89:       return dsv.parse(request.responseText);
paulo@89:     }
paulo@89:     function typedResponse(f) {
paulo@89:       return function(request) {
paulo@89:         return dsv.parse(request.responseText, f);
paulo@89:       };
paulo@89:     }
paulo@89:     dsv.parse = function(text, f) {
paulo@89:       var o;
paulo@89:       return dsv.parseRows(text, function(row, i) {
paulo@89:         if (o) return o(row, i - 1);
paulo@89:         var a = new Function("d", "return {" + row.map(function(name, i) {
paulo@89:           return JSON.stringify(name) + ": d[" + i + "]";
paulo@89:         }).join(",") + "}");
paulo@89:         o = f ? function(row, i) {
paulo@89:           return f(a(row), i);
paulo@89:         } : a;
paulo@89:       });
paulo@89:     };
paulo@89:     dsv.parseRows = function(text, f) {
paulo@89:       var EOL = {}, EOF = {}, rows = [], N = text.length, I = 0, n = 0, t, eol;
paulo@89:       function token() {
paulo@89:         if (I >= N) return EOF;
paulo@89:         if (eol) return eol = false, EOL;
paulo@89:         var j = I;
paulo@89:         if (text.charCodeAt(j) === 34) {
paulo@89:           var i = j;
paulo@89:           while (i++ < N) {
paulo@89:             if (text.charCodeAt(i) === 34) {
paulo@89:               if (text.charCodeAt(i + 1) !== 34) break;
paulo@89:               ++i;
paulo@89:             }
paulo@89:           }
paulo@89:           I = i + 2;
paulo@89:           var c = text.charCodeAt(i + 1);
paulo@89:           if (c === 13) {
paulo@89:             eol = true;
paulo@89:             if (text.charCodeAt(i + 2) === 10) ++I;
paulo@89:           } else if (c === 10) {
paulo@89:             eol = true;
paulo@89:           }
paulo@89:           return text.slice(j + 1, i).replace(/""/g, '"');
paulo@89:         }
paulo@89:         while (I < N) {
paulo@89:           var c = text.charCodeAt(I++), k = 1;
paulo@89:           if (c === 10) eol = true; else if (c === 13) {
paulo@89:             eol = true;
paulo@89:             if (text.charCodeAt(I) === 10) ++I, ++k;
paulo@89:           } else if (c !== delimiterCode) continue;
paulo@89:           return text.slice(j, I - k);
paulo@89:         }
paulo@89:         return text.slice(j);
paulo@89:       }
paulo@89:       while ((t = token()) !== EOF) {
paulo@89:         var a = [];
paulo@89:         while (t !== EOL && t !== EOF) {
paulo@89:           a.push(t);
paulo@89:           t = token();
paulo@89:         }
paulo@89:         if (f && (a = f(a, n++)) == null) continue;
paulo@89:         rows.push(a);
paulo@89:       }
paulo@89:       return rows;
paulo@89:     };
paulo@89:     dsv.format = function(rows) {
paulo@89:       if (Array.isArray(rows[0])) return dsv.formatRows(rows);
paulo@89:       var fieldSet = new d3_Set(), fields = [];
paulo@89:       rows.forEach(function(row) {
paulo@89:         for (var field in row) {
paulo@89:           if (!fieldSet.has(field)) {
paulo@89:             fields.push(fieldSet.add(field));
paulo@89:           }
paulo@89:         }
paulo@89:       });
paulo@89:       return [ fields.map(formatValue).join(delimiter) ].concat(rows.map(function(row) {
paulo@89:         return fields.map(function(field) {
paulo@89:           return formatValue(row[field]);
paulo@89:         }).join(delimiter);
paulo@89:       })).join("\n");
paulo@89:     };
paulo@89:     dsv.formatRows = function(rows) {
paulo@89:       return rows.map(formatRow).join("\n");
paulo@89:     };
paulo@89:     function formatRow(row) {
paulo@89:       return row.map(formatValue).join(delimiter);
paulo@89:     }
paulo@89:     function formatValue(text) {
paulo@89:       return reFormat.test(text) ? '"' + text.replace(/\"/g, '""') + '"' : text;
paulo@89:     }
paulo@89:     return dsv;
paulo@89:   };
paulo@89:   d3.csv = d3.dsv(",", "text/csv");
paulo@89:   d3.tsv = d3.dsv("	", "text/tab-separated-values");
paulo@89:   var d3_timer_queueHead, d3_timer_queueTail, d3_timer_interval, d3_timer_timeout, d3_timer_frame = this[d3_vendorSymbol(this, "requestAnimationFrame")] || function(callback) {
paulo@89:     setTimeout(callback, 17);
paulo@89:   };
paulo@89:   d3.timer = function() {
paulo@89:     d3_timer.apply(this, arguments);
paulo@89:   };
paulo@89:   function d3_timer(callback, delay, then) {
paulo@89:     var n = arguments.length;
paulo@89:     if (n < 2) delay = 0;
paulo@89:     if (n < 3) then = Date.now();
paulo@89:     var time = then + delay, timer = {
paulo@89:       c: callback,
paulo@89:       t: time,
paulo@89:       n: null
paulo@89:     };
paulo@89:     if (d3_timer_queueTail) d3_timer_queueTail.n = timer; else d3_timer_queueHead = timer;
paulo@89:     d3_timer_queueTail = timer;
paulo@89:     if (!d3_timer_interval) {
paulo@89:       d3_timer_timeout = clearTimeout(d3_timer_timeout);
paulo@89:       d3_timer_interval = 1;
paulo@89:       d3_timer_frame(d3_timer_step);
paulo@89:     }
paulo@89:     return timer;
paulo@89:   }
paulo@89:   function d3_timer_step() {
paulo@89:     var now = d3_timer_mark(), delay = d3_timer_sweep() - now;
paulo@89:     if (delay > 24) {
paulo@89:       if (isFinite(delay)) {
paulo@89:         clearTimeout(d3_timer_timeout);
paulo@89:         d3_timer_timeout = setTimeout(d3_timer_step, delay);
paulo@89:       }
paulo@89:       d3_timer_interval = 0;
paulo@89:     } else {
paulo@89:       d3_timer_interval = 1;
paulo@89:       d3_timer_frame(d3_timer_step);
paulo@89:     }
paulo@89:   }
paulo@89:   d3.timer.flush = function() {
paulo@89:     d3_timer_mark();
paulo@89:     d3_timer_sweep();
paulo@89:   };
paulo@89:   function d3_timer_mark() {
paulo@89:     var now = Date.now(), timer = d3_timer_queueHead;
paulo@89:     while (timer) {
paulo@89:       if (now >= timer.t && timer.c(now - timer.t)) timer.c = null;
paulo@89:       timer = timer.n;
paulo@89:     }
paulo@89:     return now;
paulo@89:   }
paulo@89:   function d3_timer_sweep() {
paulo@89:     var t0, t1 = d3_timer_queueHead, time = Infinity;
paulo@89:     while (t1) {
paulo@89:       if (t1.c) {
paulo@89:         if (t1.t < time) time = t1.t;
paulo@89:         t1 = (t0 = t1).n;
paulo@89:       } else {
paulo@89:         t1 = t0 ? t0.n = t1.n : d3_timer_queueHead = t1.n;
paulo@89:       }
paulo@89:     }
paulo@89:     d3_timer_queueTail = t0;
paulo@89:     return time;
paulo@89:   }
paulo@89:   function d3_format_precision(x, p) {
paulo@89:     return p - (x ? Math.ceil(Math.log(x) / Math.LN10) : 1);
paulo@89:   }
paulo@89:   d3.round = function(x, n) {
paulo@89:     return n ? Math.round(x * (n = Math.pow(10, n))) / n : Math.round(x);
paulo@89:   };
paulo@89:   var d3_formatPrefixes = [ "y", "z", "a", "f", "p", "n", "µ", "m", "", "k", "M", "G", "T", "P", "E", "Z", "Y" ].map(d3_formatPrefix);
paulo@89:   d3.formatPrefix = function(value, precision) {
paulo@89:     var i = 0;
paulo@89:     if (value = +value) {
paulo@89:       if (value < 0) value *= -1;
paulo@89:       if (precision) value = d3.round(value, d3_format_precision(value, precision));
paulo@89:       i = 1 + Math.floor(1e-12 + Math.log(value) / Math.LN10);
paulo@89:       i = Math.max(-24, Math.min(24, Math.floor((i - 1) / 3) * 3));
paulo@89:     }
paulo@89:     return d3_formatPrefixes[8 + i / 3];
paulo@89:   };
paulo@89:   function d3_formatPrefix(d, i) {
paulo@89:     var k = Math.pow(10, abs(8 - i) * 3);
paulo@89:     return {
paulo@89:       scale: i > 8 ? function(d) {
paulo@89:         return d / k;
paulo@89:       } : function(d) {
paulo@89:         return d * k;
paulo@89:       },
paulo@89:       symbol: d
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_locale_numberFormat(locale) {
paulo@89:     var locale_decimal = locale.decimal, locale_thousands = locale.thousands, locale_grouping = locale.grouping, locale_currency = locale.currency, formatGroup = locale_grouping && locale_thousands ? function(value, width) {
paulo@89:       var i = value.length, t = [], j = 0, g = locale_grouping[0], length = 0;
paulo@89:       while (i > 0 && g > 0) {
paulo@89:         if (length + g + 1 > width) g = Math.max(1, width - length);
paulo@89:         t.push(value.substring(i -= g, i + g));
paulo@89:         if ((length += g + 1) > width) break;
paulo@89:         g = locale_grouping[j = (j + 1) % locale_grouping.length];
paulo@89:       }
paulo@89:       return t.reverse().join(locale_thousands);
paulo@89:     } : d3_identity;
paulo@89:     return function(specifier) {
paulo@89:       var match = d3_format_re.exec(specifier), fill = match[1] || " ", align = match[2] || ">", sign = match[3] || "-", symbol = match[4] || "", zfill = match[5], width = +match[6], comma = match[7], precision = match[8], type = match[9], scale = 1, prefix = "", suffix = "", integer = false, exponent = true;
paulo@89:       if (precision) precision = +precision.substring(1);
paulo@89:       if (zfill || fill === "0" && align === "=") {
paulo@89:         zfill = fill = "0";
paulo@89:         align = "=";
paulo@89:       }
paulo@89:       switch (type) {
paulo@89:        case "n":
paulo@89:         comma = true;
paulo@89:         type = "g";
paulo@89:         break;
paulo@89: 
paulo@89:        case "%":
paulo@89:         scale = 100;
paulo@89:         suffix = "%";
paulo@89:         type = "f";
paulo@89:         break;
paulo@89: 
paulo@89:        case "p":
paulo@89:         scale = 100;
paulo@89:         suffix = "%";
paulo@89:         type = "r";
paulo@89:         break;
paulo@89: 
paulo@89:        case "b":
paulo@89:        case "o":
paulo@89:        case "x":
paulo@89:        case "X":
paulo@89:         if (symbol === "#") prefix = "0" + type.toLowerCase();
paulo@89: 
paulo@89:        case "c":
paulo@89:         exponent = false;
paulo@89: 
paulo@89:        case "d":
paulo@89:         integer = true;
paulo@89:         precision = 0;
paulo@89:         break;
paulo@89: 
paulo@89:        case "s":
paulo@89:         scale = -1;
paulo@89:         type = "r";
paulo@89:         break;
paulo@89:       }
paulo@89:       if (symbol === "$") prefix = locale_currency[0], suffix = locale_currency[1];
paulo@89:       if (type == "r" && !precision) type = "g";
paulo@89:       if (precision != null) {
paulo@89:         if (type == "g") precision = Math.max(1, Math.min(21, precision)); else if (type == "e" || type == "f") precision = Math.max(0, Math.min(20, precision));
paulo@89:       }
paulo@89:       type = d3_format_types.get(type) || d3_format_typeDefault;
paulo@89:       var zcomma = zfill && comma;
paulo@89:       return function(value) {
paulo@89:         var fullSuffix = suffix;
paulo@89:         if (integer && value % 1) return "";
paulo@89:         var negative = value < 0 || value === 0 && 1 / value < 0 ? (value = -value, "-") : sign === "-" ? "" : sign;
paulo@89:         if (scale < 0) {
paulo@89:           var unit = d3.formatPrefix(value, precision);
paulo@89:           value = unit.scale(value);
paulo@89:           fullSuffix = unit.symbol + suffix;
paulo@89:         } else {
paulo@89:           value *= scale;
paulo@89:         }
paulo@89:         value = type(value, precision);
paulo@89:         var i = value.lastIndexOf("."), before, after;
paulo@89:         if (i < 0) {
paulo@89:           var j = exponent ? value.lastIndexOf("e") : -1;
paulo@89:           if (j < 0) before = value, after = ""; else before = value.substring(0, j), after = value.substring(j);
paulo@89:         } else {
paulo@89:           before = value.substring(0, i);
paulo@89:           after = locale_decimal + value.substring(i + 1);
paulo@89:         }
paulo@89:         if (!zfill && comma) before = formatGroup(before, Infinity);
paulo@89:         var length = prefix.length + before.length + after.length + (zcomma ? 0 : negative.length), padding = length < width ? new Array(length = width - length + 1).join(fill) : "";
paulo@89:         if (zcomma) before = formatGroup(padding + before, padding.length ? width - after.length : Infinity);
paulo@89:         negative += prefix;
paulo@89:         value = before + after;
paulo@89:         return (align === "<" ? negative + value + padding : align === ">" ? padding + negative + value : align === "^" ? padding.substring(0, length >>= 1) + negative + value + padding.substring(length) : negative + (zcomma ? value : padding + value)) + fullSuffix;
paulo@89:       };
paulo@89:     };
paulo@89:   }
paulo@89:   var d3_format_re = /(?:([^{])?([<>=^]))?([+\- ])?([$#])?(0)?(\d+)?(,)?(\.-?\d+)?([a-z%])?/i;
paulo@89:   var d3_format_types = d3.map({
paulo@89:     b: function(x) {
paulo@89:       return x.toString(2);
paulo@89:     },
paulo@89:     c: function(x) {
paulo@89:       return String.fromCharCode(x);
paulo@89:     },
paulo@89:     o: function(x) {
paulo@89:       return x.toString(8);
paulo@89:     },
paulo@89:     x: function(x) {
paulo@89:       return x.toString(16);
paulo@89:     },
paulo@89:     X: function(x) {
paulo@89:       return x.toString(16).toUpperCase();
paulo@89:     },
paulo@89:     g: function(x, p) {
paulo@89:       return x.toPrecision(p);
paulo@89:     },
paulo@89:     e: function(x, p) {
paulo@89:       return x.toExponential(p);
paulo@89:     },
paulo@89:     f: function(x, p) {
paulo@89:       return x.toFixed(p);
paulo@89:     },
paulo@89:     r: function(x, p) {
paulo@89:       return (x = d3.round(x, d3_format_precision(x, p))).toFixed(Math.max(0, Math.min(20, d3_format_precision(x * (1 + 1e-15), p))));
paulo@89:     }
paulo@89:   });
paulo@89:   function d3_format_typeDefault(x) {
paulo@89:     return x + "";
paulo@89:   }
paulo@89:   var d3_time = d3.time = {}, d3_date = Date;
paulo@89:   function d3_date_utc() {
paulo@89:     this._ = new Date(arguments.length > 1 ? Date.UTC.apply(this, arguments) : arguments[0]);
paulo@89:   }
paulo@89:   d3_date_utc.prototype = {
paulo@89:     getDate: function() {
paulo@89:       return this._.getUTCDate();
paulo@89:     },
paulo@89:     getDay: function() {
paulo@89:       return this._.getUTCDay();
paulo@89:     },
paulo@89:     getFullYear: function() {
paulo@89:       return this._.getUTCFullYear();
paulo@89:     },
paulo@89:     getHours: function() {
paulo@89:       return this._.getUTCHours();
paulo@89:     },
paulo@89:     getMilliseconds: function() {
paulo@89:       return this._.getUTCMilliseconds();
paulo@89:     },
paulo@89:     getMinutes: function() {
paulo@89:       return this._.getUTCMinutes();
paulo@89:     },
paulo@89:     getMonth: function() {
paulo@89:       return this._.getUTCMonth();
paulo@89:     },
paulo@89:     getSeconds: function() {
paulo@89:       return this._.getUTCSeconds();
paulo@89:     },
paulo@89:     getTime: function() {
paulo@89:       return this._.getTime();
paulo@89:     },
paulo@89:     getTimezoneOffset: function() {
paulo@89:       return 0;
paulo@89:     },
paulo@89:     valueOf: function() {
paulo@89:       return this._.valueOf();
paulo@89:     },
paulo@89:     setDate: function() {
paulo@89:       d3_time_prototype.setUTCDate.apply(this._, arguments);
paulo@89:     },
paulo@89:     setDay: function() {
paulo@89:       d3_time_prototype.setUTCDay.apply(this._, arguments);
paulo@89:     },
paulo@89:     setFullYear: function() {
paulo@89:       d3_time_prototype.setUTCFullYear.apply(this._, arguments);
paulo@89:     },
paulo@89:     setHours: function() {
paulo@89:       d3_time_prototype.setUTCHours.apply(this._, arguments);
paulo@89:     },
paulo@89:     setMilliseconds: function() {
paulo@89:       d3_time_prototype.setUTCMilliseconds.apply(this._, arguments);
paulo@89:     },
paulo@89:     setMinutes: function() {
paulo@89:       d3_time_prototype.setUTCMinutes.apply(this._, arguments);
paulo@89:     },
paulo@89:     setMonth: function() {
paulo@89:       d3_time_prototype.setUTCMonth.apply(this._, arguments);
paulo@89:     },
paulo@89:     setSeconds: function() {
paulo@89:       d3_time_prototype.setUTCSeconds.apply(this._, arguments);
paulo@89:     },
paulo@89:     setTime: function() {
paulo@89:       d3_time_prototype.setTime.apply(this._, arguments);
paulo@89:     }
paulo@89:   };
paulo@89:   var d3_time_prototype = Date.prototype;
paulo@89:   function d3_time_interval(local, step, number) {
paulo@89:     function round(date) {
paulo@89:       var d0 = local(date), d1 = offset(d0, 1);
paulo@89:       return date - d0 < d1 - date ? d0 : d1;
paulo@89:     }
paulo@89:     function ceil(date) {
paulo@89:       step(date = local(new d3_date(date - 1)), 1);
paulo@89:       return date;
paulo@89:     }
paulo@89:     function offset(date, k) {
paulo@89:       step(date = new d3_date(+date), k);
paulo@89:       return date;
paulo@89:     }
paulo@89:     function range(t0, t1, dt) {
paulo@89:       var time = ceil(t0), times = [];
paulo@89:       if (dt > 1) {
paulo@89:         while (time < t1) {
paulo@89:           if (!(number(time) % dt)) times.push(new Date(+time));
paulo@89:           step(time, 1);
paulo@89:         }
paulo@89:       } else {
paulo@89:         while (time < t1) times.push(new Date(+time)), step(time, 1);
paulo@89:       }
paulo@89:       return times;
paulo@89:     }
paulo@89:     function range_utc(t0, t1, dt) {
paulo@89:       try {
paulo@89:         d3_date = d3_date_utc;
paulo@89:         var utc = new d3_date_utc();
paulo@89:         utc._ = t0;
paulo@89:         return range(utc, t1, dt);
paulo@89:       } finally {
paulo@89:         d3_date = Date;
paulo@89:       }
paulo@89:     }
paulo@89:     local.floor = local;
paulo@89:     local.round = round;
paulo@89:     local.ceil = ceil;
paulo@89:     local.offset = offset;
paulo@89:     local.range = range;
paulo@89:     var utc = local.utc = d3_time_interval_utc(local);
paulo@89:     utc.floor = utc;
paulo@89:     utc.round = d3_time_interval_utc(round);
paulo@89:     utc.ceil = d3_time_interval_utc(ceil);
paulo@89:     utc.offset = d3_time_interval_utc(offset);
paulo@89:     utc.range = range_utc;
paulo@89:     return local;
paulo@89:   }
paulo@89:   function d3_time_interval_utc(method) {
paulo@89:     return function(date, k) {
paulo@89:       try {
paulo@89:         d3_date = d3_date_utc;
paulo@89:         var utc = new d3_date_utc();
paulo@89:         utc._ = date;
paulo@89:         return method(utc, k)._;
paulo@89:       } finally {
paulo@89:         d3_date = Date;
paulo@89:       }
paulo@89:     };
paulo@89:   }
paulo@89:   d3_time.year = d3_time_interval(function(date) {
paulo@89:     date = d3_time.day(date);
paulo@89:     date.setMonth(0, 1);
paulo@89:     return date;
paulo@89:   }, function(date, offset) {
paulo@89:     date.setFullYear(date.getFullYear() + offset);
paulo@89:   }, function(date) {
paulo@89:     return date.getFullYear();
paulo@89:   });
paulo@89:   d3_time.years = d3_time.year.range;
paulo@89:   d3_time.years.utc = d3_time.year.utc.range;
paulo@89:   d3_time.day = d3_time_interval(function(date) {
paulo@89:     var day = new d3_date(2e3, 0);
paulo@89:     day.setFullYear(date.getFullYear(), date.getMonth(), date.getDate());
paulo@89:     return day;
paulo@89:   }, function(date, offset) {
paulo@89:     date.setDate(date.getDate() + offset);
paulo@89:   }, function(date) {
paulo@89:     return date.getDate() - 1;
paulo@89:   });
paulo@89:   d3_time.days = d3_time.day.range;
paulo@89:   d3_time.days.utc = d3_time.day.utc.range;
paulo@89:   d3_time.dayOfYear = function(date) {
paulo@89:     var year = d3_time.year(date);
paulo@89:     return Math.floor((date - year - (date.getTimezoneOffset() - year.getTimezoneOffset()) * 6e4) / 864e5);
paulo@89:   };
paulo@89:   [ "sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday" ].forEach(function(day, i) {
paulo@89:     i = 7 - i;
paulo@89:     var interval = d3_time[day] = d3_time_interval(function(date) {
paulo@89:       (date = d3_time.day(date)).setDate(date.getDate() - (date.getDay() + i) % 7);
paulo@89:       return date;
paulo@89:     }, function(date, offset) {
paulo@89:       date.setDate(date.getDate() + Math.floor(offset) * 7);
paulo@89:     }, function(date) {
paulo@89:       var day = d3_time.year(date).getDay();
paulo@89:       return Math.floor((d3_time.dayOfYear(date) + (day + i) % 7) / 7) - (day !== i);
paulo@89:     });
paulo@89:     d3_time[day + "s"] = interval.range;
paulo@89:     d3_time[day + "s"].utc = interval.utc.range;
paulo@89:     d3_time[day + "OfYear"] = function(date) {
paulo@89:       var day = d3_time.year(date).getDay();
paulo@89:       return Math.floor((d3_time.dayOfYear(date) + (day + i) % 7) / 7);
paulo@89:     };
paulo@89:   });
paulo@89:   d3_time.week = d3_time.sunday;
paulo@89:   d3_time.weeks = d3_time.sunday.range;
paulo@89:   d3_time.weeks.utc = d3_time.sunday.utc.range;
paulo@89:   d3_time.weekOfYear = d3_time.sundayOfYear;
paulo@89:   function d3_locale_timeFormat(locale) {
paulo@89:     var locale_dateTime = locale.dateTime, locale_date = locale.date, locale_time = locale.time, locale_periods = locale.periods, locale_days = locale.days, locale_shortDays = locale.shortDays, locale_months = locale.months, locale_shortMonths = locale.shortMonths;
paulo@89:     function d3_time_format(template) {
paulo@89:       var n = template.length;
paulo@89:       function format(date) {
paulo@89:         var string = [], i = -1, j = 0, c, p, f;
paulo@89:         while (++i < n) {
paulo@89:           if (template.charCodeAt(i) === 37) {
paulo@89:             string.push(template.slice(j, i));
paulo@89:             if ((p = d3_time_formatPads[c = template.charAt(++i)]) != null) c = template.charAt(++i);
paulo@89:             if (f = d3_time_formats[c]) c = f(date, p == null ? c === "e" ? " " : "0" : p);
paulo@89:             string.push(c);
paulo@89:             j = i + 1;
paulo@89:           }
paulo@89:         }
paulo@89:         string.push(template.slice(j, i));
paulo@89:         return string.join("");
paulo@89:       }
paulo@89:       format.parse = function(string) {
paulo@89:         var d = {
paulo@89:           y: 1900,
paulo@89:           m: 0,
paulo@89:           d: 1,
paulo@89:           H: 0,
paulo@89:           M: 0,
paulo@89:           S: 0,
paulo@89:           L: 0,
paulo@89:           Z: null
paulo@89:         }, i = d3_time_parse(d, template, string, 0);
paulo@89:         if (i != string.length) return null;
paulo@89:         if ("p" in d) d.H = d.H % 12 + d.p * 12;
paulo@89:         var localZ = d.Z != null && d3_date !== d3_date_utc, date = new (localZ ? d3_date_utc : d3_date)();
paulo@89:         if ("j" in d) date.setFullYear(d.y, 0, d.j); else if ("W" in d || "U" in d) {
paulo@89:           if (!("w" in d)) d.w = "W" in d ? 1 : 0;
paulo@89:           date.setFullYear(d.y, 0, 1);
paulo@89:           date.setFullYear(d.y, 0, "W" in d ? (d.w + 6) % 7 + d.W * 7 - (date.getDay() + 5) % 7 : d.w + d.U * 7 - (date.getDay() + 6) % 7);
paulo@89:         } else date.setFullYear(d.y, d.m, d.d);
paulo@89:         date.setHours(d.H + (d.Z / 100 | 0), d.M + d.Z % 100, d.S, d.L);
paulo@89:         return localZ ? date._ : date;
paulo@89:       };
paulo@89:       format.toString = function() {
paulo@89:         return template;
paulo@89:       };
paulo@89:       return format;
paulo@89:     }
paulo@89:     function d3_time_parse(date, template, string, j) {
paulo@89:       var c, p, t, i = 0, n = template.length, m = string.length;
paulo@89:       while (i < n) {
paulo@89:         if (j >= m) return -1;
paulo@89:         c = template.charCodeAt(i++);
paulo@89:         if (c === 37) {
paulo@89:           t = template.charAt(i++);
paulo@89:           p = d3_time_parsers[t in d3_time_formatPads ? template.charAt(i++) : t];
paulo@89:           if (!p || (j = p(date, string, j)) < 0) return -1;
paulo@89:         } else if (c != string.charCodeAt(j++)) {
paulo@89:           return -1;
paulo@89:         }
paulo@89:       }
paulo@89:       return j;
paulo@89:     }
paulo@89:     d3_time_format.utc = function(template) {
paulo@89:       var local = d3_time_format(template);
paulo@89:       function format(date) {
paulo@89:         try {
paulo@89:           d3_date = d3_date_utc;
paulo@89:           var utc = new d3_date();
paulo@89:           utc._ = date;
paulo@89:           return local(utc);
paulo@89:         } finally {
paulo@89:           d3_date = Date;
paulo@89:         }
paulo@89:       }
paulo@89:       format.parse = function(string) {
paulo@89:         try {
paulo@89:           d3_date = d3_date_utc;
paulo@89:           var date = local.parse(string);
paulo@89:           return date && date._;
paulo@89:         } finally {
paulo@89:           d3_date = Date;
paulo@89:         }
paulo@89:       };
paulo@89:       format.toString = local.toString;
paulo@89:       return format;
paulo@89:     };
paulo@89:     d3_time_format.multi = d3_time_format.utc.multi = d3_time_formatMulti;
paulo@89:     var d3_time_periodLookup = d3.map(), d3_time_dayRe = d3_time_formatRe(locale_days), d3_time_dayLookup = d3_time_formatLookup(locale_days), d3_time_dayAbbrevRe = d3_time_formatRe(locale_shortDays), d3_time_dayAbbrevLookup = d3_time_formatLookup(locale_shortDays), d3_time_monthRe = d3_time_formatRe(locale_months), d3_time_monthLookup = d3_time_formatLookup(locale_months), d3_time_monthAbbrevRe = d3_time_formatRe(locale_shortMonths), d3_time_monthAbbrevLookup = d3_time_formatLookup(locale_shortMonths);
paulo@89:     locale_periods.forEach(function(p, i) {
paulo@89:       d3_time_periodLookup.set(p.toLowerCase(), i);
paulo@89:     });
paulo@89:     var d3_time_formats = {
paulo@89:       a: function(d) {
paulo@89:         return locale_shortDays[d.getDay()];
paulo@89:       },
paulo@89:       A: function(d) {
paulo@89:         return locale_days[d.getDay()];
paulo@89:       },
paulo@89:       b: function(d) {
paulo@89:         return locale_shortMonths[d.getMonth()];
paulo@89:       },
paulo@89:       B: function(d) {
paulo@89:         return locale_months[d.getMonth()];
paulo@89:       },
paulo@89:       c: d3_time_format(locale_dateTime),
paulo@89:       d: function(d, p) {
paulo@89:         return d3_time_formatPad(d.getDate(), p, 2);
paulo@89:       },
paulo@89:       e: function(d, p) {
paulo@89:         return d3_time_formatPad(d.getDate(), p, 2);
paulo@89:       },
paulo@89:       H: function(d, p) {
paulo@89:         return d3_time_formatPad(d.getHours(), p, 2);
paulo@89:       },
paulo@89:       I: function(d, p) {
paulo@89:         return d3_time_formatPad(d.getHours() % 12 || 12, p, 2);
paulo@89:       },
paulo@89:       j: function(d, p) {
paulo@89:         return d3_time_formatPad(1 + d3_time.dayOfYear(d), p, 3);
paulo@89:       },
paulo@89:       L: function(d, p) {
paulo@89:         return d3_time_formatPad(d.getMilliseconds(), p, 3);
paulo@89:       },
paulo@89:       m: function(d, p) {
paulo@89:         return d3_time_formatPad(d.getMonth() + 1, p, 2);
paulo@89:       },
paulo@89:       M: function(d, p) {
paulo@89:         return d3_time_formatPad(d.getMinutes(), p, 2);
paulo@89:       },
paulo@89:       p: function(d) {
paulo@89:         return locale_periods[+(d.getHours() >= 12)];
paulo@89:       },
paulo@89:       S: function(d, p) {
paulo@89:         return d3_time_formatPad(d.getSeconds(), p, 2);
paulo@89:       },
paulo@89:       U: function(d, p) {
paulo@89:         return d3_time_formatPad(d3_time.sundayOfYear(d), p, 2);
paulo@89:       },
paulo@89:       w: function(d) {
paulo@89:         return d.getDay();
paulo@89:       },
paulo@89:       W: function(d, p) {
paulo@89:         return d3_time_formatPad(d3_time.mondayOfYear(d), p, 2);
paulo@89:       },
paulo@89:       x: d3_time_format(locale_date),
paulo@89:       X: d3_time_format(locale_time),
paulo@89:       y: function(d, p) {
paulo@89:         return d3_time_formatPad(d.getFullYear() % 100, p, 2);
paulo@89:       },
paulo@89:       Y: function(d, p) {
paulo@89:         return d3_time_formatPad(d.getFullYear() % 1e4, p, 4);
paulo@89:       },
paulo@89:       Z: d3_time_zone,
paulo@89:       "%": function() {
paulo@89:         return "%";
paulo@89:       }
paulo@89:     };
paulo@89:     var d3_time_parsers = {
paulo@89:       a: d3_time_parseWeekdayAbbrev,
paulo@89:       A: d3_time_parseWeekday,
paulo@89:       b: d3_time_parseMonthAbbrev,
paulo@89:       B: d3_time_parseMonth,
paulo@89:       c: d3_time_parseLocaleFull,
paulo@89:       d: d3_time_parseDay,
paulo@89:       e: d3_time_parseDay,
paulo@89:       H: d3_time_parseHour24,
paulo@89:       I: d3_time_parseHour24,
paulo@89:       j: d3_time_parseDayOfYear,
paulo@89:       L: d3_time_parseMilliseconds,
paulo@89:       m: d3_time_parseMonthNumber,
paulo@89:       M: d3_time_parseMinutes,
paulo@89:       p: d3_time_parseAmPm,
paulo@89:       S: d3_time_parseSeconds,
paulo@89:       U: d3_time_parseWeekNumberSunday,
paulo@89:       w: d3_time_parseWeekdayNumber,
paulo@89:       W: d3_time_parseWeekNumberMonday,
paulo@89:       x: d3_time_parseLocaleDate,
paulo@89:       X: d3_time_parseLocaleTime,
paulo@89:       y: d3_time_parseYear,
paulo@89:       Y: d3_time_parseFullYear,
paulo@89:       Z: d3_time_parseZone,
paulo@89:       "%": d3_time_parseLiteralPercent
paulo@89:     };
paulo@89:     function d3_time_parseWeekdayAbbrev(date, string, i) {
paulo@89:       d3_time_dayAbbrevRe.lastIndex = 0;
paulo@89:       var n = d3_time_dayAbbrevRe.exec(string.slice(i));
paulo@89:       return n ? (date.w = d3_time_dayAbbrevLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
paulo@89:     }
paulo@89:     function d3_time_parseWeekday(date, string, i) {
paulo@89:       d3_time_dayRe.lastIndex = 0;
paulo@89:       var n = d3_time_dayRe.exec(string.slice(i));
paulo@89:       return n ? (date.w = d3_time_dayLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
paulo@89:     }
paulo@89:     function d3_time_parseMonthAbbrev(date, string, i) {
paulo@89:       d3_time_monthAbbrevRe.lastIndex = 0;
paulo@89:       var n = d3_time_monthAbbrevRe.exec(string.slice(i));
paulo@89:       return n ? (date.m = d3_time_monthAbbrevLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
paulo@89:     }
paulo@89:     function d3_time_parseMonth(date, string, i) {
paulo@89:       d3_time_monthRe.lastIndex = 0;
paulo@89:       var n = d3_time_monthRe.exec(string.slice(i));
paulo@89:       return n ? (date.m = d3_time_monthLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
paulo@89:     }
paulo@89:     function d3_time_parseLocaleFull(date, string, i) {
paulo@89:       return d3_time_parse(date, d3_time_formats.c.toString(), string, i);
paulo@89:     }
paulo@89:     function d3_time_parseLocaleDate(date, string, i) {
paulo@89:       return d3_time_parse(date, d3_time_formats.x.toString(), string, i);
paulo@89:     }
paulo@89:     function d3_time_parseLocaleTime(date, string, i) {
paulo@89:       return d3_time_parse(date, d3_time_formats.X.toString(), string, i);
paulo@89:     }
paulo@89:     function d3_time_parseAmPm(date, string, i) {
paulo@89:       var n = d3_time_periodLookup.get(string.slice(i, i += 2).toLowerCase());
paulo@89:       return n == null ? -1 : (date.p = n, i);
paulo@89:     }
paulo@89:     return d3_time_format;
paulo@89:   }
paulo@89:   var d3_time_formatPads = {
paulo@89:     "-": "",
paulo@89:     _: " ",
paulo@89:     "0": "0"
paulo@89:   }, d3_time_numberRe = /^\s*\d+/, d3_time_percentRe = /^%/;
paulo@89:   function d3_time_formatPad(value, fill, width) {
paulo@89:     var sign = value < 0 ? "-" : "", string = (sign ? -value : value) + "", length = string.length;
paulo@89:     return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);
paulo@89:   }
paulo@89:   function d3_time_formatRe(names) {
paulo@89:     return new RegExp("^(?:" + names.map(d3.requote).join("|") + ")", "i");
paulo@89:   }
paulo@89:   function d3_time_formatLookup(names) {
paulo@89:     var map = new d3_Map(), i = -1, n = names.length;
paulo@89:     while (++i < n) map.set(names[i].toLowerCase(), i);
paulo@89:     return map;
paulo@89:   }
paulo@89:   function d3_time_parseWeekdayNumber(date, string, i) {
paulo@89:     d3_time_numberRe.lastIndex = 0;
paulo@89:     var n = d3_time_numberRe.exec(string.slice(i, i + 1));
paulo@89:     return n ? (date.w = +n[0], i + n[0].length) : -1;
paulo@89:   }
paulo@89:   function d3_time_parseWeekNumberSunday(date, string, i) {
paulo@89:     d3_time_numberRe.lastIndex = 0;
paulo@89:     var n = d3_time_numberRe.exec(string.slice(i));
paulo@89:     return n ? (date.U = +n[0], i + n[0].length) : -1;
paulo@89:   }
paulo@89:   function d3_time_parseWeekNumberMonday(date, string, i) {
paulo@89:     d3_time_numberRe.lastIndex = 0;
paulo@89:     var n = d3_time_numberRe.exec(string.slice(i));
paulo@89:     return n ? (date.W = +n[0], i + n[0].length) : -1;
paulo@89:   }
paulo@89:   function d3_time_parseFullYear(date, string, i) {
paulo@89:     d3_time_numberRe.lastIndex = 0;
paulo@89:     var n = d3_time_numberRe.exec(string.slice(i, i + 4));
paulo@89:     return n ? (date.y = +n[0], i + n[0].length) : -1;
paulo@89:   }
paulo@89:   function d3_time_parseYear(date, string, i) {
paulo@89:     d3_time_numberRe.lastIndex = 0;
paulo@89:     var n = d3_time_numberRe.exec(string.slice(i, i + 2));
paulo@89:     return n ? (date.y = d3_time_expandYear(+n[0]), i + n[0].length) : -1;
paulo@89:   }
paulo@89:   function d3_time_parseZone(date, string, i) {
paulo@89:     return /^[+-]\d{4}$/.test(string = string.slice(i, i + 5)) ? (date.Z = -string, 
paulo@89:     i + 5) : -1;
paulo@89:   }
paulo@89:   function d3_time_expandYear(d) {
paulo@89:     return d + (d > 68 ? 1900 : 2e3);
paulo@89:   }
paulo@89:   function d3_time_parseMonthNumber(date, string, i) {
paulo@89:     d3_time_numberRe.lastIndex = 0;
paulo@89:     var n = d3_time_numberRe.exec(string.slice(i, i + 2));
paulo@89:     return n ? (date.m = n[0] - 1, i + n[0].length) : -1;
paulo@89:   }
paulo@89:   function d3_time_parseDay(date, string, i) {
paulo@89:     d3_time_numberRe.lastIndex = 0;
paulo@89:     var n = d3_time_numberRe.exec(string.slice(i, i + 2));
paulo@89:     return n ? (date.d = +n[0], i + n[0].length) : -1;
paulo@89:   }
paulo@89:   function d3_time_parseDayOfYear(date, string, i) {
paulo@89:     d3_time_numberRe.lastIndex = 0;
paulo@89:     var n = d3_time_numberRe.exec(string.slice(i, i + 3));
paulo@89:     return n ? (date.j = +n[0], i + n[0].length) : -1;
paulo@89:   }
paulo@89:   function d3_time_parseHour24(date, string, i) {
paulo@89:     d3_time_numberRe.lastIndex = 0;
paulo@89:     var n = d3_time_numberRe.exec(string.slice(i, i + 2));
paulo@89:     return n ? (date.H = +n[0], i + n[0].length) : -1;
paulo@89:   }
paulo@89:   function d3_time_parseMinutes(date, string, i) {
paulo@89:     d3_time_numberRe.lastIndex = 0;
paulo@89:     var n = d3_time_numberRe.exec(string.slice(i, i + 2));
paulo@89:     return n ? (date.M = +n[0], i + n[0].length) : -1;
paulo@89:   }
paulo@89:   function d3_time_parseSeconds(date, string, i) {
paulo@89:     d3_time_numberRe.lastIndex = 0;
paulo@89:     var n = d3_time_numberRe.exec(string.slice(i, i + 2));
paulo@89:     return n ? (date.S = +n[0], i + n[0].length) : -1;
paulo@89:   }
paulo@89:   function d3_time_parseMilliseconds(date, string, i) {
paulo@89:     d3_time_numberRe.lastIndex = 0;
paulo@89:     var n = d3_time_numberRe.exec(string.slice(i, i + 3));
paulo@89:     return n ? (date.L = +n[0], i + n[0].length) : -1;
paulo@89:   }
paulo@89:   function d3_time_zone(d) {
paulo@89:     var z = d.getTimezoneOffset(), zs = z > 0 ? "-" : "+", zh = abs(z) / 60 | 0, zm = abs(z) % 60;
paulo@89:     return zs + d3_time_formatPad(zh, "0", 2) + d3_time_formatPad(zm, "0", 2);
paulo@89:   }
paulo@89:   function d3_time_parseLiteralPercent(date, string, i) {
paulo@89:     d3_time_percentRe.lastIndex = 0;
paulo@89:     var n = d3_time_percentRe.exec(string.slice(i, i + 1));
paulo@89:     return n ? i + n[0].length : -1;
paulo@89:   }
paulo@89:   function d3_time_formatMulti(formats) {
paulo@89:     var n = formats.length, i = -1;
paulo@89:     while (++i < n) formats[i][0] = this(formats[i][0]);
paulo@89:     return function(date) {
paulo@89:       var i = 0, f = formats[i];
paulo@89:       while (!f[1](date)) f = formats[++i];
paulo@89:       return f[0](date);
paulo@89:     };
paulo@89:   }
paulo@89:   d3.locale = function(locale) {
paulo@89:     return {
paulo@89:       numberFormat: d3_locale_numberFormat(locale),
paulo@89:       timeFormat: d3_locale_timeFormat(locale)
paulo@89:     };
paulo@89:   };
paulo@89:   var d3_locale_enUS = d3.locale({
paulo@89:     decimal: ".",
paulo@89:     thousands: ",",
paulo@89:     grouping: [ 3 ],
paulo@89:     currency: [ "$", "" ],
paulo@89:     dateTime: "%a %b %e %X %Y",
paulo@89:     date: "%m/%d/%Y",
paulo@89:     time: "%H:%M:%S",
paulo@89:     periods: [ "AM", "PM" ],
paulo@89:     days: [ "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" ],
paulo@89:     shortDays: [ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" ],
paulo@89:     months: [ "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" ],
paulo@89:     shortMonths: [ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" ]
paulo@89:   });
paulo@89:   d3.format = d3_locale_enUS.numberFormat;
paulo@89:   d3.geo = {};
paulo@89:   function d3_adder() {}
paulo@89:   d3_adder.prototype = {
paulo@89:     s: 0,
paulo@89:     t: 0,
paulo@89:     add: function(y) {
paulo@89:       d3_adderSum(y, this.t, d3_adderTemp);
paulo@89:       d3_adderSum(d3_adderTemp.s, this.s, this);
paulo@89:       if (this.s) this.t += d3_adderTemp.t; else this.s = d3_adderTemp.t;
paulo@89:     },
paulo@89:     reset: function() {
paulo@89:       this.s = this.t = 0;
paulo@89:     },
paulo@89:     valueOf: function() {
paulo@89:       return this.s;
paulo@89:     }
paulo@89:   };
paulo@89:   var d3_adderTemp = new d3_adder();
paulo@89:   function d3_adderSum(a, b, o) {
paulo@89:     var x = o.s = a + b, bv = x - a, av = x - bv;
paulo@89:     o.t = a - av + (b - bv);
paulo@89:   }
paulo@89:   d3.geo.stream = function(object, listener) {
paulo@89:     if (object && d3_geo_streamObjectType.hasOwnProperty(object.type)) {
paulo@89:       d3_geo_streamObjectType[object.type](object, listener);
paulo@89:     } else {
paulo@89:       d3_geo_streamGeometry(object, listener);
paulo@89:     }
paulo@89:   };
paulo@89:   function d3_geo_streamGeometry(geometry, listener) {
paulo@89:     if (geometry && d3_geo_streamGeometryType.hasOwnProperty(geometry.type)) {
paulo@89:       d3_geo_streamGeometryType[geometry.type](geometry, listener);
paulo@89:     }
paulo@89:   }
paulo@89:   var d3_geo_streamObjectType = {
paulo@89:     Feature: function(feature, listener) {
paulo@89:       d3_geo_streamGeometry(feature.geometry, listener);
paulo@89:     },
paulo@89:     FeatureCollection: function(object, listener) {
paulo@89:       var features = object.features, i = -1, n = features.length;
paulo@89:       while (++i < n) d3_geo_streamGeometry(features[i].geometry, listener);
paulo@89:     }
paulo@89:   };
paulo@89:   var d3_geo_streamGeometryType = {
paulo@89:     Sphere: function(object, listener) {
paulo@89:       listener.sphere();
paulo@89:     },
paulo@89:     Point: function(object, listener) {
paulo@89:       object = object.coordinates;
paulo@89:       listener.point(object[0], object[1], object[2]);
paulo@89:     },
paulo@89:     MultiPoint: function(object, listener) {
paulo@89:       var coordinates = object.coordinates, i = -1, n = coordinates.length;
paulo@89:       while (++i < n) object = coordinates[i], listener.point(object[0], object[1], object[2]);
paulo@89:     },
paulo@89:     LineString: function(object, listener) {
paulo@89:       d3_geo_streamLine(object.coordinates, listener, 0);
paulo@89:     },
paulo@89:     MultiLineString: function(object, listener) {
paulo@89:       var coordinates = object.coordinates, i = -1, n = coordinates.length;
paulo@89:       while (++i < n) d3_geo_streamLine(coordinates[i], listener, 0);
paulo@89:     },
paulo@89:     Polygon: function(object, listener) {
paulo@89:       d3_geo_streamPolygon(object.coordinates, listener);
paulo@89:     },
paulo@89:     MultiPolygon: function(object, listener) {
paulo@89:       var coordinates = object.coordinates, i = -1, n = coordinates.length;
paulo@89:       while (++i < n) d3_geo_streamPolygon(coordinates[i], listener);
paulo@89:     },
paulo@89:     GeometryCollection: function(object, listener) {
paulo@89:       var geometries = object.geometries, i = -1, n = geometries.length;
paulo@89:       while (++i < n) d3_geo_streamGeometry(geometries[i], listener);
paulo@89:     }
paulo@89:   };
paulo@89:   function d3_geo_streamLine(coordinates, listener, closed) {
paulo@89:     var i = -1, n = coordinates.length - closed, coordinate;
paulo@89:     listener.lineStart();
paulo@89:     while (++i < n) coordinate = coordinates[i], listener.point(coordinate[0], coordinate[1], coordinate[2]);
paulo@89:     listener.lineEnd();
paulo@89:   }
paulo@89:   function d3_geo_streamPolygon(coordinates, listener) {
paulo@89:     var i = -1, n = coordinates.length;
paulo@89:     listener.polygonStart();
paulo@89:     while (++i < n) d3_geo_streamLine(coordinates[i], listener, 1);
paulo@89:     listener.polygonEnd();
paulo@89:   }
paulo@89:   d3.geo.area = function(object) {
paulo@89:     d3_geo_areaSum = 0;
paulo@89:     d3.geo.stream(object, d3_geo_area);
paulo@89:     return d3_geo_areaSum;
paulo@89:   };
paulo@89:   var d3_geo_areaSum, d3_geo_areaRingSum = new d3_adder();
paulo@89:   var d3_geo_area = {
paulo@89:     sphere: function() {
paulo@89:       d3_geo_areaSum += 4 * π;
paulo@89:     },
paulo@89:     point: d3_noop,
paulo@89:     lineStart: d3_noop,
paulo@89:     lineEnd: d3_noop,
paulo@89:     polygonStart: function() {
paulo@89:       d3_geo_areaRingSum.reset();
paulo@89:       d3_geo_area.lineStart = d3_geo_areaRingStart;
paulo@89:     },
paulo@89:     polygonEnd: function() {
paulo@89:       var area = 2 * d3_geo_areaRingSum;
paulo@89:       d3_geo_areaSum += area < 0 ? 4 * π + area : area;
paulo@89:       d3_geo_area.lineStart = d3_geo_area.lineEnd = d3_geo_area.point = d3_noop;
paulo@89:     }
paulo@89:   };
paulo@89:   function d3_geo_areaRingStart() {
paulo@89:     var λ00, φ00, λ0, cosφ0, sinφ0;
paulo@89:     d3_geo_area.point = function(λ, φ) {
paulo@89:       d3_geo_area.point = nextPoint;
paulo@89:       λ0 = (λ00 = λ) * d3_radians, cosφ0 = Math.cos(φ = (φ00 = φ) * d3_radians / 2 + π / 4), 
paulo@89:       sinφ0 = Math.sin(φ);
paulo@89:     };
paulo@89:     function nextPoint(λ, φ) {
paulo@89:       λ *= d3_radians;
paulo@89:       φ = φ * d3_radians / 2 + π / 4;
paulo@89:       var dλ = λ - λ0, sdλ = dλ >= 0 ? 1 : -1, adλ = sdλ * dλ, cosφ = Math.cos(φ), sinφ = Math.sin(φ), k = sinφ0 * sinφ, u = cosφ0 * cosφ + k * Math.cos(adλ), v = k * sdλ * Math.sin(adλ);
paulo@89:       d3_geo_areaRingSum.add(Math.atan2(v, u));
paulo@89:       λ0 = λ, cosφ0 = cosφ, sinφ0 = sinφ;
paulo@89:     }
paulo@89:     d3_geo_area.lineEnd = function() {
paulo@89:       nextPoint(λ00, φ00);
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_geo_cartesian(spherical) {
paulo@89:     var λ = spherical[0], φ = spherical[1], cosφ = Math.cos(φ);
paulo@89:     return [ cosφ * Math.cos(λ), cosφ * Math.sin(λ), Math.sin(φ) ];
paulo@89:   }
paulo@89:   function d3_geo_cartesianDot(a, b) {
paulo@89:     return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
paulo@89:   }
paulo@89:   function d3_geo_cartesianCross(a, b) {
paulo@89:     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] ];
paulo@89:   }
paulo@89:   function d3_geo_cartesianAdd(a, b) {
paulo@89:     a[0] += b[0];
paulo@89:     a[1] += b[1];
paulo@89:     a[2] += b[2];
paulo@89:   }
paulo@89:   function d3_geo_cartesianScale(vector, k) {
paulo@89:     return [ vector[0] * k, vector[1] * k, vector[2] * k ];
paulo@89:   }
paulo@89:   function d3_geo_cartesianNormalize(d) {
paulo@89:     var l = Math.sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
paulo@89:     d[0] /= l;
paulo@89:     d[1] /= l;
paulo@89:     d[2] /= l;
paulo@89:   }
paulo@89:   function d3_geo_spherical(cartesian) {
paulo@89:     return [ Math.atan2(cartesian[1], cartesian[0]), d3_asin(cartesian[2]) ];
paulo@89:   }
paulo@89:   function d3_geo_sphericalEqual(a, b) {
paulo@89:     return abs(a[0] - b[0]) < ε && abs(a[1] - b[1]) < ε;
paulo@89:   }
paulo@89:   d3.geo.bounds = function() {
paulo@89:     var λ0, φ0, λ1, φ1, λ_, λ__, φ__, p0, dλSum, ranges, range;
paulo@89:     var bound = {
paulo@89:       point: point,
paulo@89:       lineStart: lineStart,
paulo@89:       lineEnd: lineEnd,
paulo@89:       polygonStart: function() {
paulo@89:         bound.point = ringPoint;
paulo@89:         bound.lineStart = ringStart;
paulo@89:         bound.lineEnd = ringEnd;
paulo@89:         dλSum = 0;
paulo@89:         d3_geo_area.polygonStart();
paulo@89:       },
paulo@89:       polygonEnd: function() {
paulo@89:         d3_geo_area.polygonEnd();
paulo@89:         bound.point = point;
paulo@89:         bound.lineStart = lineStart;
paulo@89:         bound.lineEnd = lineEnd;
paulo@89:         if (d3_geo_areaRingSum < 0) λ0 = -(λ1 = 180), φ0 = -(φ1 = 90); else if (dλSum > ε) φ1 = 90; else if (dλSum < -ε) φ0 = -90;
paulo@89:         range[0] = λ0, range[1] = λ1;
paulo@89:       }
paulo@89:     };
paulo@89:     function point(λ, φ) {
paulo@89:       ranges.push(range = [ λ0 = λ, λ1 = λ ]);
paulo@89:       if (φ < φ0) φ0 = φ;
paulo@89:       if (φ > φ1) φ1 = φ;
paulo@89:     }
paulo@89:     function linePoint(λ, φ) {
paulo@89:       var p = d3_geo_cartesian([ λ * d3_radians, φ * d3_radians ]);
paulo@89:       if (p0) {
paulo@89:         var normal = d3_geo_cartesianCross(p0, p), equatorial = [ normal[1], -normal[0], 0 ], inflection = d3_geo_cartesianCross(equatorial, normal);
paulo@89:         d3_geo_cartesianNormalize(inflection);
paulo@89:         inflection = d3_geo_spherical(inflection);
paulo@89:         var dλ = λ - λ_, s = dλ > 0 ? 1 : -1, λi = inflection[0] * d3_degrees * s, antimeridian = abs(dλ) > 180;
paulo@89:         if (antimeridian ^ (s * λ_ < λi && λi < s * λ)) {
paulo@89:           var φi = inflection[1] * d3_degrees;
paulo@89:           if (φi > φ1) φ1 = φi;
paulo@89:         } else if (λi = (λi + 360) % 360 - 180, antimeridian ^ (s * λ_ < λi && λi < s * λ)) {
paulo@89:           var φi = -inflection[1] * d3_degrees;
paulo@89:           if (φi < φ0) φ0 = φi;
paulo@89:         } else {
paulo@89:           if (φ < φ0) φ0 = φ;
paulo@89:           if (φ > φ1) φ1 = φ;
paulo@89:         }
paulo@89:         if (antimeridian) {
paulo@89:           if (λ < λ_) {
paulo@89:             if (angle(λ0, λ) > angle(λ0, λ1)) λ1 = λ;
paulo@89:           } else {
paulo@89:             if (angle(λ, λ1) > angle(λ0, λ1)) λ0 = λ;
paulo@89:           }
paulo@89:         } else {
paulo@89:           if (λ1 >= λ0) {
paulo@89:             if (λ < λ0) λ0 = λ;
paulo@89:             if (λ > λ1) λ1 = λ;
paulo@89:           } else {
paulo@89:             if (λ > λ_) {
paulo@89:               if (angle(λ0, λ) > angle(λ0, λ1)) λ1 = λ;
paulo@89:             } else {
paulo@89:               if (angle(λ, λ1) > angle(λ0, λ1)) λ0 = λ;
paulo@89:             }
paulo@89:           }
paulo@89:         }
paulo@89:       } else {
paulo@89:         point(λ, φ);
paulo@89:       }
paulo@89:       p0 = p, λ_ = λ;
paulo@89:     }
paulo@89:     function lineStart() {
paulo@89:       bound.point = linePoint;
paulo@89:     }
paulo@89:     function lineEnd() {
paulo@89:       range[0] = λ0, range[1] = λ1;
paulo@89:       bound.point = point;
paulo@89:       p0 = null;
paulo@89:     }
paulo@89:     function ringPoint(λ, φ) {
paulo@89:       if (p0) {
paulo@89:         var dλ = λ - λ_;
paulo@89:         dλSum += abs(dλ) > 180 ? dλ + (dλ > 0 ? 360 : -360) : dλ;
paulo@89:       } else λ__ = λ, φ__ = φ;
paulo@89:       d3_geo_area.point(λ, φ);
paulo@89:       linePoint(λ, φ);
paulo@89:     }
paulo@89:     function ringStart() {
paulo@89:       d3_geo_area.lineStart();
paulo@89:     }
paulo@89:     function ringEnd() {
paulo@89:       ringPoint(λ__, φ__);
paulo@89:       d3_geo_area.lineEnd();
paulo@89:       if (abs(dλSum) > ε) λ0 = -(λ1 = 180);
paulo@89:       range[0] = λ0, range[1] = λ1;
paulo@89:       p0 = null;
paulo@89:     }
paulo@89:     function angle(λ0, λ1) {
paulo@89:       return (λ1 -= λ0) < 0 ? λ1 + 360 : λ1;
paulo@89:     }
paulo@89:     function compareRanges(a, b) {
paulo@89:       return a[0] - b[0];
paulo@89:     }
paulo@89:     function withinRange(x, range) {
paulo@89:       return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
paulo@89:     }
paulo@89:     return function(feature) {
paulo@89:       φ1 = λ1 = -(λ0 = φ0 = Infinity);
paulo@89:       ranges = [];
paulo@89:       d3.geo.stream(feature, bound);
paulo@89:       var n = ranges.length;
paulo@89:       if (n) {
paulo@89:         ranges.sort(compareRanges);
paulo@89:         for (var i = 1, a = ranges[0], b, merged = [ a ]; i < n; ++i) {
paulo@89:           b = ranges[i];
paulo@89:           if (withinRange(b[0], a) || withinRange(b[1], a)) {
paulo@89:             if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
paulo@89:             if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
paulo@89:           } else {
paulo@89:             merged.push(a = b);
paulo@89:           }
paulo@89:         }
paulo@89:         var best = -Infinity, dλ;
paulo@89:         for (var n = merged.length - 1, i = 0, a = merged[n], b; i <= n; a = b, ++i) {
paulo@89:           b = merged[i];
paulo@89:           if ((dλ = angle(a[1], b[0])) > best) best = dλ, λ0 = b[0], λ1 = a[1];
paulo@89:         }
paulo@89:       }
paulo@89:       ranges = range = null;
paulo@89:       return λ0 === Infinity || φ0 === Infinity ? [ [ NaN, NaN ], [ NaN, NaN ] ] : [ [ λ0, φ0 ], [ λ1, φ1 ] ];
paulo@89:     };
paulo@89:   }();
paulo@89:   d3.geo.centroid = function(object) {
paulo@89:     d3_geo_centroidW0 = d3_geo_centroidW1 = d3_geo_centroidX0 = d3_geo_centroidY0 = d3_geo_centroidZ0 = d3_geo_centroidX1 = d3_geo_centroidY1 = d3_geo_centroidZ1 = d3_geo_centroidX2 = d3_geo_centroidY2 = d3_geo_centroidZ2 = 0;
paulo@89:     d3.geo.stream(object, d3_geo_centroid);
paulo@89:     var x = d3_geo_centroidX2, y = d3_geo_centroidY2, z = d3_geo_centroidZ2, m = x * x + y * y + z * z;
paulo@89:     if (m < ε2) {
paulo@89:       x = d3_geo_centroidX1, y = d3_geo_centroidY1, z = d3_geo_centroidZ1;
paulo@89:       if (d3_geo_centroidW1 < ε) x = d3_geo_centroidX0, y = d3_geo_centroidY0, z = d3_geo_centroidZ0;
paulo@89:       m = x * x + y * y + z * z;
paulo@89:       if (m < ε2) return [ NaN, NaN ];
paulo@89:     }
paulo@89:     return [ Math.atan2(y, x) * d3_degrees, d3_asin(z / Math.sqrt(m)) * d3_degrees ];
paulo@89:   };
paulo@89:   var d3_geo_centroidW0, d3_geo_centroidW1, d3_geo_centroidX0, d3_geo_centroidY0, d3_geo_centroidZ0, d3_geo_centroidX1, d3_geo_centroidY1, d3_geo_centroidZ1, d3_geo_centroidX2, d3_geo_centroidY2, d3_geo_centroidZ2;
paulo@89:   var d3_geo_centroid = {
paulo@89:     sphere: d3_noop,
paulo@89:     point: d3_geo_centroidPoint,
paulo@89:     lineStart: d3_geo_centroidLineStart,
paulo@89:     lineEnd: d3_geo_centroidLineEnd,
paulo@89:     polygonStart: function() {
paulo@89:       d3_geo_centroid.lineStart = d3_geo_centroidRingStart;
paulo@89:     },
paulo@89:     polygonEnd: function() {
paulo@89:       d3_geo_centroid.lineStart = d3_geo_centroidLineStart;
paulo@89:     }
paulo@89:   };
paulo@89:   function d3_geo_centroidPoint(λ, φ) {
paulo@89:     λ *= d3_radians;
paulo@89:     var cosφ = Math.cos(φ *= d3_radians);
paulo@89:     d3_geo_centroidPointXYZ(cosφ * Math.cos(λ), cosφ * Math.sin(λ), Math.sin(φ));
paulo@89:   }
paulo@89:   function d3_geo_centroidPointXYZ(x, y, z) {
paulo@89:     ++d3_geo_centroidW0;
paulo@89:     d3_geo_centroidX0 += (x - d3_geo_centroidX0) / d3_geo_centroidW0;
paulo@89:     d3_geo_centroidY0 += (y - d3_geo_centroidY0) / d3_geo_centroidW0;
paulo@89:     d3_geo_centroidZ0 += (z - d3_geo_centroidZ0) / d3_geo_centroidW0;
paulo@89:   }
paulo@89:   function d3_geo_centroidLineStart() {
paulo@89:     var x0, y0, z0;
paulo@89:     d3_geo_centroid.point = function(λ, φ) {
paulo@89:       λ *= d3_radians;
paulo@89:       var cosφ = Math.cos(φ *= d3_radians);
paulo@89:       x0 = cosφ * Math.cos(λ);
paulo@89:       y0 = cosφ * Math.sin(λ);
paulo@89:       z0 = Math.sin(φ);
paulo@89:       d3_geo_centroid.point = nextPoint;
paulo@89:       d3_geo_centroidPointXYZ(x0, y0, z0);
paulo@89:     };
paulo@89:     function nextPoint(λ, φ) {
paulo@89:       λ *= d3_radians;
paulo@89:       var cosφ = Math.cos(φ *= d3_radians), x = cosφ * Math.cos(λ), y = cosφ * Math.sin(λ), z = Math.sin(φ), w = Math.atan2(Math.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);
paulo@89:       d3_geo_centroidW1 += w;
paulo@89:       d3_geo_centroidX1 += w * (x0 + (x0 = x));
paulo@89:       d3_geo_centroidY1 += w * (y0 + (y0 = y));
paulo@89:       d3_geo_centroidZ1 += w * (z0 + (z0 = z));
paulo@89:       d3_geo_centroidPointXYZ(x0, y0, z0);
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_geo_centroidLineEnd() {
paulo@89:     d3_geo_centroid.point = d3_geo_centroidPoint;
paulo@89:   }
paulo@89:   function d3_geo_centroidRingStart() {
paulo@89:     var λ00, φ00, x0, y0, z0;
paulo@89:     d3_geo_centroid.point = function(λ, φ) {
paulo@89:       λ00 = λ, φ00 = φ;
paulo@89:       d3_geo_centroid.point = nextPoint;
paulo@89:       λ *= d3_radians;
paulo@89:       var cosφ = Math.cos(φ *= d3_radians);
paulo@89:       x0 = cosφ * Math.cos(λ);
paulo@89:       y0 = cosφ * Math.sin(λ);
paulo@89:       z0 = Math.sin(φ);
paulo@89:       d3_geo_centroidPointXYZ(x0, y0, z0);
paulo@89:     };
paulo@89:     d3_geo_centroid.lineEnd = function() {
paulo@89:       nextPoint(λ00, φ00);
paulo@89:       d3_geo_centroid.lineEnd = d3_geo_centroidLineEnd;
paulo@89:       d3_geo_centroid.point = d3_geo_centroidPoint;
paulo@89:     };
paulo@89:     function nextPoint(λ, φ) {
paulo@89:       λ *= d3_radians;
paulo@89:       var cosφ = Math.cos(φ *= d3_radians), x = cosφ * Math.cos(λ), y = cosφ * Math.sin(λ), z = Math.sin(φ), cx = y0 * z - z0 * y, cy = z0 * x - x0 * z, cz = x0 * y - y0 * x, m = Math.sqrt(cx * cx + cy * cy + cz * cz), u = x0 * x + y0 * y + z0 * z, v = m && -d3_acos(u) / m, w = Math.atan2(m, u);
paulo@89:       d3_geo_centroidX2 += v * cx;
paulo@89:       d3_geo_centroidY2 += v * cy;
paulo@89:       d3_geo_centroidZ2 += v * cz;
paulo@89:       d3_geo_centroidW1 += w;
paulo@89:       d3_geo_centroidX1 += w * (x0 + (x0 = x));
paulo@89:       d3_geo_centroidY1 += w * (y0 + (y0 = y));
paulo@89:       d3_geo_centroidZ1 += w * (z0 + (z0 = z));
paulo@89:       d3_geo_centroidPointXYZ(x0, y0, z0);
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_geo_compose(a, b) {
paulo@89:     function compose(x, y) {
paulo@89:       return x = a(x, y), b(x[0], x[1]);
paulo@89:     }
paulo@89:     if (a.invert && b.invert) compose.invert = function(x, y) {
paulo@89:       return x = b.invert(x, y), x && a.invert(x[0], x[1]);
paulo@89:     };
paulo@89:     return compose;
paulo@89:   }
paulo@89:   function d3_true() {
paulo@89:     return true;
paulo@89:   }
paulo@89:   function d3_geo_clipPolygon(segments, compare, clipStartInside, interpolate, listener) {
paulo@89:     var subject = [], clip = [];
paulo@89:     segments.forEach(function(segment) {
paulo@89:       if ((n = segment.length - 1) <= 0) return;
paulo@89:       var n, p0 = segment[0], p1 = segment[n];
paulo@89:       if (d3_geo_sphericalEqual(p0, p1)) {
paulo@89:         listener.lineStart();
paulo@89:         for (var i = 0; i < n; ++i) listener.point((p0 = segment[i])[0], p0[1]);
paulo@89:         listener.lineEnd();
paulo@89:         return;
paulo@89:       }
paulo@89:       var a = new d3_geo_clipPolygonIntersection(p0, segment, null, true), b = new d3_geo_clipPolygonIntersection(p0, null, a, false);
paulo@89:       a.o = b;
paulo@89:       subject.push(a);
paulo@89:       clip.push(b);
paulo@89:       a = new d3_geo_clipPolygonIntersection(p1, segment, null, false);
paulo@89:       b = new d3_geo_clipPolygonIntersection(p1, null, a, true);
paulo@89:       a.o = b;
paulo@89:       subject.push(a);
paulo@89:       clip.push(b);
paulo@89:     });
paulo@89:     clip.sort(compare);
paulo@89:     d3_geo_clipPolygonLinkCircular(subject);
paulo@89:     d3_geo_clipPolygonLinkCircular(clip);
paulo@89:     if (!subject.length) return;
paulo@89:     for (var i = 0, entry = clipStartInside, n = clip.length; i < n; ++i) {
paulo@89:       clip[i].e = entry = !entry;
paulo@89:     }
paulo@89:     var start = subject[0], points, point;
paulo@89:     while (1) {
paulo@89:       var current = start, isSubject = true;
paulo@89:       while (current.v) if ((current = current.n) === start) return;
paulo@89:       points = current.z;
paulo@89:       listener.lineStart();
paulo@89:       do {
paulo@89:         current.v = current.o.v = true;
paulo@89:         if (current.e) {
paulo@89:           if (isSubject) {
paulo@89:             for (var i = 0, n = points.length; i < n; ++i) listener.point((point = points[i])[0], point[1]);
paulo@89:           } else {
paulo@89:             interpolate(current.x, current.n.x, 1, listener);
paulo@89:           }
paulo@89:           current = current.n;
paulo@89:         } else {
paulo@89:           if (isSubject) {
paulo@89:             points = current.p.z;
paulo@89:             for (var i = points.length - 1; i >= 0; --i) listener.point((point = points[i])[0], point[1]);
paulo@89:           } else {
paulo@89:             interpolate(current.x, current.p.x, -1, listener);
paulo@89:           }
paulo@89:           current = current.p;
paulo@89:         }
paulo@89:         current = current.o;
paulo@89:         points = current.z;
paulo@89:         isSubject = !isSubject;
paulo@89:       } while (!current.v);
paulo@89:       listener.lineEnd();
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_geo_clipPolygonLinkCircular(array) {
paulo@89:     if (!(n = array.length)) return;
paulo@89:     var n, i = 0, a = array[0], b;
paulo@89:     while (++i < n) {
paulo@89:       a.n = b = array[i];
paulo@89:       b.p = a;
paulo@89:       a = b;
paulo@89:     }
paulo@89:     a.n = b = array[0];
paulo@89:     b.p = a;
paulo@89:   }
paulo@89:   function d3_geo_clipPolygonIntersection(point, points, other, entry) {
paulo@89:     this.x = point;
paulo@89:     this.z = points;
paulo@89:     this.o = other;
paulo@89:     this.e = entry;
paulo@89:     this.v = false;
paulo@89:     this.n = this.p = null;
paulo@89:   }
paulo@89:   function d3_geo_clip(pointVisible, clipLine, interpolate, clipStart) {
paulo@89:     return function(rotate, listener) {
paulo@89:       var line = clipLine(listener), rotatedClipStart = rotate.invert(clipStart[0], clipStart[1]);
paulo@89:       var clip = {
paulo@89:         point: point,
paulo@89:         lineStart: lineStart,
paulo@89:         lineEnd: lineEnd,
paulo@89:         polygonStart: function() {
paulo@89:           clip.point = pointRing;
paulo@89:           clip.lineStart = ringStart;
paulo@89:           clip.lineEnd = ringEnd;
paulo@89:           segments = [];
paulo@89:           polygon = [];
paulo@89:         },
paulo@89:         polygonEnd: function() {
paulo@89:           clip.point = point;
paulo@89:           clip.lineStart = lineStart;
paulo@89:           clip.lineEnd = lineEnd;
paulo@89:           segments = d3.merge(segments);
paulo@89:           var clipStartInside = d3_geo_pointInPolygon(rotatedClipStart, polygon);
paulo@89:           if (segments.length) {
paulo@89:             if (!polygonStarted) listener.polygonStart(), polygonStarted = true;
paulo@89:             d3_geo_clipPolygon(segments, d3_geo_clipSort, clipStartInside, interpolate, listener);
paulo@89:           } else if (clipStartInside) {
paulo@89:             if (!polygonStarted) listener.polygonStart(), polygonStarted = true;
paulo@89:             listener.lineStart();
paulo@89:             interpolate(null, null, 1, listener);
paulo@89:             listener.lineEnd();
paulo@89:           }
paulo@89:           if (polygonStarted) listener.polygonEnd(), polygonStarted = false;
paulo@89:           segments = polygon = null;
paulo@89:         },
paulo@89:         sphere: function() {
paulo@89:           listener.polygonStart();
paulo@89:           listener.lineStart();
paulo@89:           interpolate(null, null, 1, listener);
paulo@89:           listener.lineEnd();
paulo@89:           listener.polygonEnd();
paulo@89:         }
paulo@89:       };
paulo@89:       function point(λ, φ) {
paulo@89:         var point = rotate(λ, φ);
paulo@89:         if (pointVisible(λ = point[0], φ = point[1])) listener.point(λ, φ);
paulo@89:       }
paulo@89:       function pointLine(λ, φ) {
paulo@89:         var point = rotate(λ, φ);
paulo@89:         line.point(point[0], point[1]);
paulo@89:       }
paulo@89:       function lineStart() {
paulo@89:         clip.point = pointLine;
paulo@89:         line.lineStart();
paulo@89:       }
paulo@89:       function lineEnd() {
paulo@89:         clip.point = point;
paulo@89:         line.lineEnd();
paulo@89:       }
paulo@89:       var segments;
paulo@89:       var buffer = d3_geo_clipBufferListener(), ringListener = clipLine(buffer), polygonStarted = false, polygon, ring;
paulo@89:       function pointRing(λ, φ) {
paulo@89:         ring.push([ λ, φ ]);
paulo@89:         var point = rotate(λ, φ);
paulo@89:         ringListener.point(point[0], point[1]);
paulo@89:       }
paulo@89:       function ringStart() {
paulo@89:         ringListener.lineStart();
paulo@89:         ring = [];
paulo@89:       }
paulo@89:       function ringEnd() {
paulo@89:         pointRing(ring[0][0], ring[0][1]);
paulo@89:         ringListener.lineEnd();
paulo@89:         var clean = ringListener.clean(), ringSegments = buffer.buffer(), segment, n = ringSegments.length;
paulo@89:         ring.pop();
paulo@89:         polygon.push(ring);
paulo@89:         ring = null;
paulo@89:         if (!n) return;
paulo@89:         if (clean & 1) {
paulo@89:           segment = ringSegments[0];
paulo@89:           var n = segment.length - 1, i = -1, point;
paulo@89:           if (n > 0) {
paulo@89:             if (!polygonStarted) listener.polygonStart(), polygonStarted = true;
paulo@89:             listener.lineStart();
paulo@89:             while (++i < n) listener.point((point = segment[i])[0], point[1]);
paulo@89:             listener.lineEnd();
paulo@89:           }
paulo@89:           return;
paulo@89:         }
paulo@89:         if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));
paulo@89:         segments.push(ringSegments.filter(d3_geo_clipSegmentLength1));
paulo@89:       }
paulo@89:       return clip;
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_geo_clipSegmentLength1(segment) {
paulo@89:     return segment.length > 1;
paulo@89:   }
paulo@89:   function d3_geo_clipBufferListener() {
paulo@89:     var lines = [], line;
paulo@89:     return {
paulo@89:       lineStart: function() {
paulo@89:         lines.push(line = []);
paulo@89:       },
paulo@89:       point: function(λ, φ) {
paulo@89:         line.push([ λ, φ ]);
paulo@89:       },
paulo@89:       lineEnd: d3_noop,
paulo@89:       buffer: function() {
paulo@89:         var buffer = lines;
paulo@89:         lines = [];
paulo@89:         line = null;
paulo@89:         return buffer;
paulo@89:       },
paulo@89:       rejoin: function() {
paulo@89:         if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
paulo@89:       }
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_geo_clipSort(a, b) {
paulo@89:     return ((a = a.x)[0] < 0 ? a[1] - halfπ - ε : halfπ - a[1]) - ((b = b.x)[0] < 0 ? b[1] - halfπ - ε : halfπ - b[1]);
paulo@89:   }
paulo@89:   var d3_geo_clipAntimeridian = d3_geo_clip(d3_true, d3_geo_clipAntimeridianLine, d3_geo_clipAntimeridianInterpolate, [ -π, -π / 2 ]);
paulo@89:   function d3_geo_clipAntimeridianLine(listener) {
paulo@89:     var λ0 = NaN, φ0 = NaN, sλ0 = NaN, clean;
paulo@89:     return {
paulo@89:       lineStart: function() {
paulo@89:         listener.lineStart();
paulo@89:         clean = 1;
paulo@89:       },
paulo@89:       point: function(λ1, φ1) {
paulo@89:         var sλ1 = λ1 > 0 ? π : -π, dλ = abs(λ1 - λ0);
paulo@89:         if (abs(dλ - π) < ε) {
paulo@89:           listener.point(λ0, φ0 = (φ0 + φ1) / 2 > 0 ? halfπ : -halfπ);
paulo@89:           listener.point(sλ0, φ0);
paulo@89:           listener.lineEnd();
paulo@89:           listener.lineStart();
paulo@89:           listener.point(sλ1, φ0);
paulo@89:           listener.point(λ1, φ0);
paulo@89:           clean = 0;
paulo@89:         } else if (sλ0 !== sλ1 && dλ >= π) {
paulo@89:           if (abs(λ0 - sλ0) < ε) λ0 -= sλ0 * ε;
paulo@89:           if (abs(λ1 - sλ1) < ε) λ1 -= sλ1 * ε;
paulo@89:           φ0 = d3_geo_clipAntimeridianIntersect(λ0, φ0, λ1, φ1);
paulo@89:           listener.point(sλ0, φ0);
paulo@89:           listener.lineEnd();
paulo@89:           listener.lineStart();
paulo@89:           listener.point(sλ1, φ0);
paulo@89:           clean = 0;
paulo@89:         }
paulo@89:         listener.point(λ0 = λ1, φ0 = φ1);
paulo@89:         sλ0 = sλ1;
paulo@89:       },
paulo@89:       lineEnd: function() {
paulo@89:         listener.lineEnd();
paulo@89:         λ0 = φ0 = NaN;
paulo@89:       },
paulo@89:       clean: function() {
paulo@89:         return 2 - clean;
paulo@89:       }
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_geo_clipAntimeridianIntersect(λ0, φ0, λ1, φ1) {
paulo@89:     var cosφ0, cosφ1, sinλ0_λ1 = Math.sin(λ0 - λ1);
paulo@89:     return abs(sinλ0_λ1) > ε ? Math.atan((Math.sin(φ0) * (cosφ1 = Math.cos(φ1)) * Math.sin(λ1) - Math.sin(φ1) * (cosφ0 = Math.cos(φ0)) * Math.sin(λ0)) / (cosφ0 * cosφ1 * sinλ0_λ1)) : (φ0 + φ1) / 2;
paulo@89:   }
paulo@89:   function d3_geo_clipAntimeridianInterpolate(from, to, direction, listener) {
paulo@89:     var φ;
paulo@89:     if (from == null) {
paulo@89:       φ = direction * halfπ;
paulo@89:       listener.point(-π, φ);
paulo@89:       listener.point(0, φ);
paulo@89:       listener.point(π, φ);
paulo@89:       listener.point(π, 0);
paulo@89:       listener.point(π, -φ);
paulo@89:       listener.point(0, -φ);
paulo@89:       listener.point(-π, -φ);
paulo@89:       listener.point(-π, 0);
paulo@89:       listener.point(-π, φ);
paulo@89:     } else if (abs(from[0] - to[0]) > ε) {
paulo@89:       var s = from[0] < to[0] ? π : -π;
paulo@89:       φ = direction * s / 2;
paulo@89:       listener.point(-s, φ);
paulo@89:       listener.point(0, φ);
paulo@89:       listener.point(s, φ);
paulo@89:     } else {
paulo@89:       listener.point(to[0], to[1]);
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_geo_pointInPolygon(point, polygon) {
paulo@89:     var meridian = point[0], parallel = point[1], meridianNormal = [ Math.sin(meridian), -Math.cos(meridian), 0 ], polarAngle = 0, winding = 0;
paulo@89:     d3_geo_areaRingSum.reset();
paulo@89:     for (var i = 0, n = polygon.length; i < n; ++i) {
paulo@89:       var ring = polygon[i], m = ring.length;
paulo@89:       if (!m) continue;
paulo@89:       var point0 = ring[0], λ0 = point0[0], φ0 = point0[1] / 2 + π / 4, sinφ0 = Math.sin(φ0), cosφ0 = Math.cos(φ0), j = 1;
paulo@89:       while (true) {
paulo@89:         if (j === m) j = 0;
paulo@89:         point = ring[j];
paulo@89:         var λ = point[0], φ = point[1] / 2 + π / 4, sinφ = Math.sin(φ), cosφ = Math.cos(φ), dλ = λ - λ0, sdλ = dλ >= 0 ? 1 : -1, adλ = sdλ * dλ, antimeridian = adλ > π, k = sinφ0 * sinφ;
paulo@89:         d3_geo_areaRingSum.add(Math.atan2(k * sdλ * Math.sin(adλ), cosφ0 * cosφ + k * Math.cos(adλ)));
paulo@89:         polarAngle += antimeridian ? dλ + sdλ * τ : dλ;
paulo@89:         if (antimeridian ^ λ0 >= meridian ^ λ >= meridian) {
paulo@89:           var arc = d3_geo_cartesianCross(d3_geo_cartesian(point0), d3_geo_cartesian(point));
paulo@89:           d3_geo_cartesianNormalize(arc);
paulo@89:           var intersection = d3_geo_cartesianCross(meridianNormal, arc);
paulo@89:           d3_geo_cartesianNormalize(intersection);
paulo@89:           var φarc = (antimeridian ^ dλ >= 0 ? -1 : 1) * d3_asin(intersection[2]);
paulo@89:           if (parallel > φarc || parallel === φarc && (arc[0] || arc[1])) {
paulo@89:             winding += antimeridian ^ dλ >= 0 ? 1 : -1;
paulo@89:           }
paulo@89:         }
paulo@89:         if (!j++) break;
paulo@89:         λ0 = λ, sinφ0 = sinφ, cosφ0 = cosφ, point0 = point;
paulo@89:       }
paulo@89:     }
paulo@89:     return (polarAngle < -ε || polarAngle < ε && d3_geo_areaRingSum < -ε) ^ winding & 1;
paulo@89:   }
paulo@89:   function d3_geo_clipCircle(radius) {
paulo@89:     var cr = Math.cos(radius), smallRadius = cr > 0, notHemisphere = abs(cr) > ε, interpolate = d3_geo_circleInterpolate(radius, 6 * d3_radians);
paulo@89:     return d3_geo_clip(visible, clipLine, interpolate, smallRadius ? [ 0, -radius ] : [ -π, radius - π ]);
paulo@89:     function visible(λ, φ) {
paulo@89:       return Math.cos(λ) * Math.cos(φ) > cr;
paulo@89:     }
paulo@89:     function clipLine(listener) {
paulo@89:       var point0, c0, v0, v00, clean;
paulo@89:       return {
paulo@89:         lineStart: function() {
paulo@89:           v00 = v0 = false;
paulo@89:           clean = 1;
paulo@89:         },
paulo@89:         point: function(λ, φ) {
paulo@89:           var point1 = [ λ, φ ], point2, v = visible(λ, φ), c = smallRadius ? v ? 0 : code(λ, φ) : v ? code(λ + (λ < 0 ? π : -π), φ) : 0;
paulo@89:           if (!point0 && (v00 = v0 = v)) listener.lineStart();
paulo@89:           if (v !== v0) {
paulo@89:             point2 = intersect(point0, point1);
paulo@89:             if (d3_geo_sphericalEqual(point0, point2) || d3_geo_sphericalEqual(point1, point2)) {
paulo@89:               point1[0] += ε;
paulo@89:               point1[1] += ε;
paulo@89:               v = visible(point1[0], point1[1]);
paulo@89:             }
paulo@89:           }
paulo@89:           if (v !== v0) {
paulo@89:             clean = 0;
paulo@89:             if (v) {
paulo@89:               listener.lineStart();
paulo@89:               point2 = intersect(point1, point0);
paulo@89:               listener.point(point2[0], point2[1]);
paulo@89:             } else {
paulo@89:               point2 = intersect(point0, point1);
paulo@89:               listener.point(point2[0], point2[1]);
paulo@89:               listener.lineEnd();
paulo@89:             }
paulo@89:             point0 = point2;
paulo@89:           } else if (notHemisphere && point0 && smallRadius ^ v) {
paulo@89:             var t;
paulo@89:             if (!(c & c0) && (t = intersect(point1, point0, true))) {
paulo@89:               clean = 0;
paulo@89:               if (smallRadius) {
paulo@89:                 listener.lineStart();
paulo@89:                 listener.point(t[0][0], t[0][1]);
paulo@89:                 listener.point(t[1][0], t[1][1]);
paulo@89:                 listener.lineEnd();
paulo@89:               } else {
paulo@89:                 listener.point(t[1][0], t[1][1]);
paulo@89:                 listener.lineEnd();
paulo@89:                 listener.lineStart();
paulo@89:                 listener.point(t[0][0], t[0][1]);
paulo@89:               }
paulo@89:             }
paulo@89:           }
paulo@89:           if (v && (!point0 || !d3_geo_sphericalEqual(point0, point1))) {
paulo@89:             listener.point(point1[0], point1[1]);
paulo@89:           }
paulo@89:           point0 = point1, v0 = v, c0 = c;
paulo@89:         },
paulo@89:         lineEnd: function() {
paulo@89:           if (v0) listener.lineEnd();
paulo@89:           point0 = null;
paulo@89:         },
paulo@89:         clean: function() {
paulo@89:           return clean | (v00 && v0) << 1;
paulo@89:         }
paulo@89:       };
paulo@89:     }
paulo@89:     function intersect(a, b, two) {
paulo@89:       var pa = d3_geo_cartesian(a), pb = d3_geo_cartesian(b);
paulo@89:       var n1 = [ 1, 0, 0 ], n2 = d3_geo_cartesianCross(pa, pb), n2n2 = d3_geo_cartesianDot(n2, n2), n1n2 = n2[0], determinant = n2n2 - n1n2 * n1n2;
paulo@89:       if (!determinant) return !two && a;
paulo@89:       var c1 = cr * n2n2 / determinant, c2 = -cr * n1n2 / determinant, n1xn2 = d3_geo_cartesianCross(n1, n2), A = d3_geo_cartesianScale(n1, c1), B = d3_geo_cartesianScale(n2, c2);
paulo@89:       d3_geo_cartesianAdd(A, B);
paulo@89:       var u = n1xn2, w = d3_geo_cartesianDot(A, u), uu = d3_geo_cartesianDot(u, u), t2 = w * w - uu * (d3_geo_cartesianDot(A, A) - 1);
paulo@89:       if (t2 < 0) return;
paulo@89:       var t = Math.sqrt(t2), q = d3_geo_cartesianScale(u, (-w - t) / uu);
paulo@89:       d3_geo_cartesianAdd(q, A);
paulo@89:       q = d3_geo_spherical(q);
paulo@89:       if (!two) return q;
paulo@89:       var λ0 = a[0], λ1 = b[0], φ0 = a[1], φ1 = b[1], z;
paulo@89:       if (λ1 < λ0) z = λ0, λ0 = λ1, λ1 = z;
paulo@89:       var δλ = λ1 - λ0, polar = abs(δλ - π) < ε, meridian = polar || δλ < ε;
paulo@89:       if (!polar && φ1 < φ0) z = φ0, φ0 = φ1, φ1 = z;
paulo@89:       if (meridian ? polar ? φ0 + φ1 > 0 ^ q[1] < (abs(q[0] - λ0) < ε ? φ0 : φ1) : φ0 <= q[1] && q[1] <= φ1 : δλ > π ^ (λ0 <= q[0] && q[0] <= λ1)) {
paulo@89:         var q1 = d3_geo_cartesianScale(u, (-w + t) / uu);
paulo@89:         d3_geo_cartesianAdd(q1, A);
paulo@89:         return [ q, d3_geo_spherical(q1) ];
paulo@89:       }
paulo@89:     }
paulo@89:     function code(λ, φ) {
paulo@89:       var r = smallRadius ? radius : π - radius, code = 0;
paulo@89:       if (λ < -r) code |= 1; else if (λ > r) code |= 2;
paulo@89:       if (φ < -r) code |= 4; else if (φ > r) code |= 8;
paulo@89:       return code;
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_geom_clipLine(x0, y0, x1, y1) {
paulo@89:     return function(line) {
paulo@89:       var a = line.a, b = line.b, ax = a.x, ay = a.y, bx = b.x, by = b.y, t0 = 0, t1 = 1, dx = bx - ax, dy = by - ay, r;
paulo@89:       r = x0 - ax;
paulo@89:       if (!dx && r > 0) return;
paulo@89:       r /= dx;
paulo@89:       if (dx < 0) {
paulo@89:         if (r < t0) return;
paulo@89:         if (r < t1) t1 = r;
paulo@89:       } else if (dx > 0) {
paulo@89:         if (r > t1) return;
paulo@89:         if (r > t0) t0 = r;
paulo@89:       }
paulo@89:       r = x1 - ax;
paulo@89:       if (!dx && r < 0) return;
paulo@89:       r /= dx;
paulo@89:       if (dx < 0) {
paulo@89:         if (r > t1) return;
paulo@89:         if (r > t0) t0 = r;
paulo@89:       } else if (dx > 0) {
paulo@89:         if (r < t0) return;
paulo@89:         if (r < t1) t1 = r;
paulo@89:       }
paulo@89:       r = y0 - ay;
paulo@89:       if (!dy && r > 0) return;
paulo@89:       r /= dy;
paulo@89:       if (dy < 0) {
paulo@89:         if (r < t0) return;
paulo@89:         if (r < t1) t1 = r;
paulo@89:       } else if (dy > 0) {
paulo@89:         if (r > t1) return;
paulo@89:         if (r > t0) t0 = r;
paulo@89:       }
paulo@89:       r = y1 - ay;
paulo@89:       if (!dy && r < 0) return;
paulo@89:       r /= dy;
paulo@89:       if (dy < 0) {
paulo@89:         if (r > t1) return;
paulo@89:         if (r > t0) t0 = r;
paulo@89:       } else if (dy > 0) {
paulo@89:         if (r < t0) return;
paulo@89:         if (r < t1) t1 = r;
paulo@89:       }
paulo@89:       if (t0 > 0) line.a = {
paulo@89:         x: ax + t0 * dx,
paulo@89:         y: ay + t0 * dy
paulo@89:       };
paulo@89:       if (t1 < 1) line.b = {
paulo@89:         x: ax + t1 * dx,
paulo@89:         y: ay + t1 * dy
paulo@89:       };
paulo@89:       return line;
paulo@89:     };
paulo@89:   }
paulo@89:   var d3_geo_clipExtentMAX = 1e9;
paulo@89:   d3.geo.clipExtent = function() {
paulo@89:     var x0, y0, x1, y1, stream, clip, clipExtent = {
paulo@89:       stream: function(output) {
paulo@89:         if (stream) stream.valid = false;
paulo@89:         stream = clip(output);
paulo@89:         stream.valid = true;
paulo@89:         return stream;
paulo@89:       },
paulo@89:       extent: function(_) {
paulo@89:         if (!arguments.length) return [ [ x0, y0 ], [ x1, y1 ] ];
paulo@89:         clip = d3_geo_clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]);
paulo@89:         if (stream) stream.valid = false, stream = null;
paulo@89:         return clipExtent;
paulo@89:       }
paulo@89:     };
paulo@89:     return clipExtent.extent([ [ 0, 0 ], [ 960, 500 ] ]);
paulo@89:   };
paulo@89:   function d3_geo_clipExtent(x0, y0, x1, y1) {
paulo@89:     return function(listener) {
paulo@89:       var listener_ = listener, bufferListener = d3_geo_clipBufferListener(), clipLine = d3_geom_clipLine(x0, y0, x1, y1), segments, polygon, ring;
paulo@89:       var clip = {
paulo@89:         point: point,
paulo@89:         lineStart: lineStart,
paulo@89:         lineEnd: lineEnd,
paulo@89:         polygonStart: function() {
paulo@89:           listener = bufferListener;
paulo@89:           segments = [];
paulo@89:           polygon = [];
paulo@89:           clean = true;
paulo@89:         },
paulo@89:         polygonEnd: function() {
paulo@89:           listener = listener_;
paulo@89:           segments = d3.merge(segments);
paulo@89:           var clipStartInside = insidePolygon([ x0, y1 ]), inside = clean && clipStartInside, visible = segments.length;
paulo@89:           if (inside || visible) {
paulo@89:             listener.polygonStart();
paulo@89:             if (inside) {
paulo@89:               listener.lineStart();
paulo@89:               interpolate(null, null, 1, listener);
paulo@89:               listener.lineEnd();
paulo@89:             }
paulo@89:             if (visible) {
paulo@89:               d3_geo_clipPolygon(segments, compare, clipStartInside, interpolate, listener);
paulo@89:             }
paulo@89:             listener.polygonEnd();
paulo@89:           }
paulo@89:           segments = polygon = ring = null;
paulo@89:         }
paulo@89:       };
paulo@89:       function insidePolygon(p) {
paulo@89:         var wn = 0, n = polygon.length, y = p[1];
paulo@89:         for (var i = 0; i < n; ++i) {
paulo@89:           for (var j = 1, v = polygon[i], m = v.length, a = v[0], b; j < m; ++j) {
paulo@89:             b = v[j];
paulo@89:             if (a[1] <= y) {
paulo@89:               if (b[1] > y && d3_cross2d(a, b, p) > 0) ++wn;
paulo@89:             } else {
paulo@89:               if (b[1] <= y && d3_cross2d(a, b, p) < 0) --wn;
paulo@89:             }
paulo@89:             a = b;
paulo@89:           }
paulo@89:         }
paulo@89:         return wn !== 0;
paulo@89:       }
paulo@89:       function interpolate(from, to, direction, listener) {
paulo@89:         var a = 0, a1 = 0;
paulo@89:         if (from == null || (a = corner(from, direction)) !== (a1 = corner(to, direction)) || comparePoints(from, to) < 0 ^ direction > 0) {
paulo@89:           do {
paulo@89:             listener.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
paulo@89:           } while ((a = (a + direction + 4) % 4) !== a1);
paulo@89:         } else {
paulo@89:           listener.point(to[0], to[1]);
paulo@89:         }
paulo@89:       }
paulo@89:       function pointVisible(x, y) {
paulo@89:         return x0 <= x && x <= x1 && y0 <= y && y <= y1;
paulo@89:       }
paulo@89:       function point(x, y) {
paulo@89:         if (pointVisible(x, y)) listener.point(x, y);
paulo@89:       }
paulo@89:       var x__, y__, v__, x_, y_, v_, first, clean;
paulo@89:       function lineStart() {
paulo@89:         clip.point = linePoint;
paulo@89:         if (polygon) polygon.push(ring = []);
paulo@89:         first = true;
paulo@89:         v_ = false;
paulo@89:         x_ = y_ = NaN;
paulo@89:       }
paulo@89:       function lineEnd() {
paulo@89:         if (segments) {
paulo@89:           linePoint(x__, y__);
paulo@89:           if (v__ && v_) bufferListener.rejoin();
paulo@89:           segments.push(bufferListener.buffer());
paulo@89:         }
paulo@89:         clip.point = point;
paulo@89:         if (v_) listener.lineEnd();
paulo@89:       }
paulo@89:       function linePoint(x, y) {
paulo@89:         x = Math.max(-d3_geo_clipExtentMAX, Math.min(d3_geo_clipExtentMAX, x));
paulo@89:         y = Math.max(-d3_geo_clipExtentMAX, Math.min(d3_geo_clipExtentMAX, y));
paulo@89:         var v = pointVisible(x, y);
paulo@89:         if (polygon) ring.push([ x, y ]);
paulo@89:         if (first) {
paulo@89:           x__ = x, y__ = y, v__ = v;
paulo@89:           first = false;
paulo@89:           if (v) {
paulo@89:             listener.lineStart();
paulo@89:             listener.point(x, y);
paulo@89:           }
paulo@89:         } else {
paulo@89:           if (v && v_) listener.point(x, y); else {
paulo@89:             var l = {
paulo@89:               a: {
paulo@89:                 x: x_,
paulo@89:                 y: y_
paulo@89:               },
paulo@89:               b: {
paulo@89:                 x: x,
paulo@89:                 y: y
paulo@89:               }
paulo@89:             };
paulo@89:             if (clipLine(l)) {
paulo@89:               if (!v_) {
paulo@89:                 listener.lineStart();
paulo@89:                 listener.point(l.a.x, l.a.y);
paulo@89:               }
paulo@89:               listener.point(l.b.x, l.b.y);
paulo@89:               if (!v) listener.lineEnd();
paulo@89:               clean = false;
paulo@89:             } else if (v) {
paulo@89:               listener.lineStart();
paulo@89:               listener.point(x, y);
paulo@89:               clean = false;
paulo@89:             }
paulo@89:           }
paulo@89:         }
paulo@89:         x_ = x, y_ = y, v_ = v;
paulo@89:       }
paulo@89:       return clip;
paulo@89:     };
paulo@89:     function corner(p, direction) {
paulo@89:       return abs(p[0] - x0) < ε ? direction > 0 ? 0 : 3 : abs(p[0] - x1) < ε ? direction > 0 ? 2 : 1 : abs(p[1] - y0) < ε ? direction > 0 ? 1 : 0 : direction > 0 ? 3 : 2;
paulo@89:     }
paulo@89:     function compare(a, b) {
paulo@89:       return comparePoints(a.x, b.x);
paulo@89:     }
paulo@89:     function comparePoints(a, b) {
paulo@89:       var ca = corner(a, 1), cb = corner(b, 1);
paulo@89:       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];
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_geo_conic(projectAt) {
paulo@89:     var φ0 = 0, φ1 = π / 3, m = d3_geo_projectionMutator(projectAt), p = m(φ0, φ1);
paulo@89:     p.parallels = function(_) {
paulo@89:       if (!arguments.length) return [ φ0 / π * 180, φ1 / π * 180 ];
paulo@89:       return m(φ0 = _[0] * π / 180, φ1 = _[1] * π / 180);
paulo@89:     };
paulo@89:     return p;
paulo@89:   }
paulo@89:   function d3_geo_conicEqualArea(φ0, φ1) {
paulo@89:     var sinφ0 = Math.sin(φ0), n = (sinφ0 + Math.sin(φ1)) / 2, C = 1 + sinφ0 * (2 * n - sinφ0), ρ0 = Math.sqrt(C) / n;
paulo@89:     function forward(λ, φ) {
paulo@89:       var ρ = Math.sqrt(C - 2 * n * Math.sin(φ)) / n;
paulo@89:       return [ ρ * Math.sin(λ *= n), ρ0 - ρ * Math.cos(λ) ];
paulo@89:     }
paulo@89:     forward.invert = function(x, y) {
paulo@89:       var ρ0_y = ρ0 - y;
paulo@89:       return [ Math.atan2(x, ρ0_y) / n, d3_asin((C - (x * x + ρ0_y * ρ0_y) * n * n) / (2 * n)) ];
paulo@89:     };
paulo@89:     return forward;
paulo@89:   }
paulo@89:   (d3.geo.conicEqualArea = function() {
paulo@89:     return d3_geo_conic(d3_geo_conicEqualArea);
paulo@89:   }).raw = d3_geo_conicEqualArea;
paulo@89:   d3.geo.albers = function() {
paulo@89:     return d3.geo.conicEqualArea().rotate([ 96, 0 ]).center([ -.6, 38.7 ]).parallels([ 29.5, 45.5 ]).scale(1070);
paulo@89:   };
paulo@89:   d3.geo.albersUsa = function() {
paulo@89:     var lower48 = d3.geo.albers();
paulo@89:     var alaska = d3.geo.conicEqualArea().rotate([ 154, 0 ]).center([ -2, 58.5 ]).parallels([ 55, 65 ]);
paulo@89:     var hawaii = d3.geo.conicEqualArea().rotate([ 157, 0 ]).center([ -3, 19.9 ]).parallels([ 8, 18 ]);
paulo@89:     var point, pointStream = {
paulo@89:       point: function(x, y) {
paulo@89:         point = [ x, y ];
paulo@89:       }
paulo@89:     }, lower48Point, alaskaPoint, hawaiiPoint;
paulo@89:     function albersUsa(coordinates) {
paulo@89:       var x = coordinates[0], y = coordinates[1];
paulo@89:       point = null;
paulo@89:       (lower48Point(x, y), point) || (alaskaPoint(x, y), point) || hawaiiPoint(x, y);
paulo@89:       return point;
paulo@89:     }
paulo@89:     albersUsa.invert = function(coordinates) {
paulo@89:       var k = lower48.scale(), t = lower48.translate(), x = (coordinates[0] - t[0]) / k, y = (coordinates[1] - t[1]) / k;
paulo@89:       return (y >= .12 && y < .234 && x >= -.425 && x < -.214 ? alaska : y >= .166 && y < .234 && x >= -.214 && x < -.115 ? hawaii : lower48).invert(coordinates);
paulo@89:     };
paulo@89:     albersUsa.stream = function(stream) {
paulo@89:       var lower48Stream = lower48.stream(stream), alaskaStream = alaska.stream(stream), hawaiiStream = hawaii.stream(stream);
paulo@89:       return {
paulo@89:         point: function(x, y) {
paulo@89:           lower48Stream.point(x, y);
paulo@89:           alaskaStream.point(x, y);
paulo@89:           hawaiiStream.point(x, y);
paulo@89:         },
paulo@89:         sphere: function() {
paulo@89:           lower48Stream.sphere();
paulo@89:           alaskaStream.sphere();
paulo@89:           hawaiiStream.sphere();
paulo@89:         },
paulo@89:         lineStart: function() {
paulo@89:           lower48Stream.lineStart();
paulo@89:           alaskaStream.lineStart();
paulo@89:           hawaiiStream.lineStart();
paulo@89:         },
paulo@89:         lineEnd: function() {
paulo@89:           lower48Stream.lineEnd();
paulo@89:           alaskaStream.lineEnd();
paulo@89:           hawaiiStream.lineEnd();
paulo@89:         },
paulo@89:         polygonStart: function() {
paulo@89:           lower48Stream.polygonStart();
paulo@89:           alaskaStream.polygonStart();
paulo@89:           hawaiiStream.polygonStart();
paulo@89:         },
paulo@89:         polygonEnd: function() {
paulo@89:           lower48Stream.polygonEnd();
paulo@89:           alaskaStream.polygonEnd();
paulo@89:           hawaiiStream.polygonEnd();
paulo@89:         }
paulo@89:       };
paulo@89:     };
paulo@89:     albersUsa.precision = function(_) {
paulo@89:       if (!arguments.length) return lower48.precision();
paulo@89:       lower48.precision(_);
paulo@89:       alaska.precision(_);
paulo@89:       hawaii.precision(_);
paulo@89:       return albersUsa;
paulo@89:     };
paulo@89:     albersUsa.scale = function(_) {
paulo@89:       if (!arguments.length) return lower48.scale();
paulo@89:       lower48.scale(_);
paulo@89:       alaska.scale(_ * .35);
paulo@89:       hawaii.scale(_);
paulo@89:       return albersUsa.translate(lower48.translate());
paulo@89:     };
paulo@89:     albersUsa.translate = function(_) {
paulo@89:       if (!arguments.length) return lower48.translate();
paulo@89:       var k = lower48.scale(), x = +_[0], y = +_[1];
paulo@89:       lower48Point = lower48.translate(_).clipExtent([ [ x - .455 * k, y - .238 * k ], [ x + .455 * k, y + .238 * k ] ]).stream(pointStream).point;
paulo@89:       alaskaPoint = alaska.translate([ x - .307 * k, y + .201 * k ]).clipExtent([ [ x - .425 * k + ε, y + .12 * k + ε ], [ x - .214 * k - ε, y + .234 * k - ε ] ]).stream(pointStream).point;
paulo@89:       hawaiiPoint = hawaii.translate([ x - .205 * k, y + .212 * k ]).clipExtent([ [ x - .214 * k + ε, y + .166 * k + ε ], [ x - .115 * k - ε, y + .234 * k - ε ] ]).stream(pointStream).point;
paulo@89:       return albersUsa;
paulo@89:     };
paulo@89:     return albersUsa.scale(1070);
paulo@89:   };
paulo@89:   var d3_geo_pathAreaSum, d3_geo_pathAreaPolygon, d3_geo_pathArea = {
paulo@89:     point: d3_noop,
paulo@89:     lineStart: d3_noop,
paulo@89:     lineEnd: d3_noop,
paulo@89:     polygonStart: function() {
paulo@89:       d3_geo_pathAreaPolygon = 0;
paulo@89:       d3_geo_pathArea.lineStart = d3_geo_pathAreaRingStart;
paulo@89:     },
paulo@89:     polygonEnd: function() {
paulo@89:       d3_geo_pathArea.lineStart = d3_geo_pathArea.lineEnd = d3_geo_pathArea.point = d3_noop;
paulo@89:       d3_geo_pathAreaSum += abs(d3_geo_pathAreaPolygon / 2);
paulo@89:     }
paulo@89:   };
paulo@89:   function d3_geo_pathAreaRingStart() {
paulo@89:     var x00, y00, x0, y0;
paulo@89:     d3_geo_pathArea.point = function(x, y) {
paulo@89:       d3_geo_pathArea.point = nextPoint;
paulo@89:       x00 = x0 = x, y00 = y0 = y;
paulo@89:     };
paulo@89:     function nextPoint(x, y) {
paulo@89:       d3_geo_pathAreaPolygon += y0 * x - x0 * y;
paulo@89:       x0 = x, y0 = y;
paulo@89:     }
paulo@89:     d3_geo_pathArea.lineEnd = function() {
paulo@89:       nextPoint(x00, y00);
paulo@89:     };
paulo@89:   }
paulo@89:   var d3_geo_pathBoundsX0, d3_geo_pathBoundsY0, d3_geo_pathBoundsX1, d3_geo_pathBoundsY1;
paulo@89:   var d3_geo_pathBounds = {
paulo@89:     point: d3_geo_pathBoundsPoint,
paulo@89:     lineStart: d3_noop,
paulo@89:     lineEnd: d3_noop,
paulo@89:     polygonStart: d3_noop,
paulo@89:     polygonEnd: d3_noop
paulo@89:   };
paulo@89:   function d3_geo_pathBoundsPoint(x, y) {
paulo@89:     if (x < d3_geo_pathBoundsX0) d3_geo_pathBoundsX0 = x;
paulo@89:     if (x > d3_geo_pathBoundsX1) d3_geo_pathBoundsX1 = x;
paulo@89:     if (y < d3_geo_pathBoundsY0) d3_geo_pathBoundsY0 = y;
paulo@89:     if (y > d3_geo_pathBoundsY1) d3_geo_pathBoundsY1 = y;
paulo@89:   }
paulo@89:   function d3_geo_pathBuffer() {
paulo@89:     var pointCircle = d3_geo_pathBufferCircle(4.5), buffer = [];
paulo@89:     var stream = {
paulo@89:       point: point,
paulo@89:       lineStart: function() {
paulo@89:         stream.point = pointLineStart;
paulo@89:       },
paulo@89:       lineEnd: lineEnd,
paulo@89:       polygonStart: function() {
paulo@89:         stream.lineEnd = lineEndPolygon;
paulo@89:       },
paulo@89:       polygonEnd: function() {
paulo@89:         stream.lineEnd = lineEnd;
paulo@89:         stream.point = point;
paulo@89:       },
paulo@89:       pointRadius: function(_) {
paulo@89:         pointCircle = d3_geo_pathBufferCircle(_);
paulo@89:         return stream;
paulo@89:       },
paulo@89:       result: function() {
paulo@89:         if (buffer.length) {
paulo@89:           var result = buffer.join("");
paulo@89:           buffer = [];
paulo@89:           return result;
paulo@89:         }
paulo@89:       }
paulo@89:     };
paulo@89:     function point(x, y) {
paulo@89:       buffer.push("M", x, ",", y, pointCircle);
paulo@89:     }
paulo@89:     function pointLineStart(x, y) {
paulo@89:       buffer.push("M", x, ",", y);
paulo@89:       stream.point = pointLine;
paulo@89:     }
paulo@89:     function pointLine(x, y) {
paulo@89:       buffer.push("L", x, ",", y);
paulo@89:     }
paulo@89:     function lineEnd() {
paulo@89:       stream.point = point;
paulo@89:     }
paulo@89:     function lineEndPolygon() {
paulo@89:       buffer.push("Z");
paulo@89:     }
paulo@89:     return stream;
paulo@89:   }
paulo@89:   function d3_geo_pathBufferCircle(radius) {
paulo@89:     return "m0," + radius + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius + "z";
paulo@89:   }
paulo@89:   var d3_geo_pathCentroid = {
paulo@89:     point: d3_geo_pathCentroidPoint,
paulo@89:     lineStart: d3_geo_pathCentroidLineStart,
paulo@89:     lineEnd: d3_geo_pathCentroidLineEnd,
paulo@89:     polygonStart: function() {
paulo@89:       d3_geo_pathCentroid.lineStart = d3_geo_pathCentroidRingStart;
paulo@89:     },
paulo@89:     polygonEnd: function() {
paulo@89:       d3_geo_pathCentroid.point = d3_geo_pathCentroidPoint;
paulo@89:       d3_geo_pathCentroid.lineStart = d3_geo_pathCentroidLineStart;
paulo@89:       d3_geo_pathCentroid.lineEnd = d3_geo_pathCentroidLineEnd;
paulo@89:     }
paulo@89:   };
paulo@89:   function d3_geo_pathCentroidPoint(x, y) {
paulo@89:     d3_geo_centroidX0 += x;
paulo@89:     d3_geo_centroidY0 += y;
paulo@89:     ++d3_geo_centroidZ0;
paulo@89:   }
paulo@89:   function d3_geo_pathCentroidLineStart() {
paulo@89:     var x0, y0;
paulo@89:     d3_geo_pathCentroid.point = function(x, y) {
paulo@89:       d3_geo_pathCentroid.point = nextPoint;
paulo@89:       d3_geo_pathCentroidPoint(x0 = x, y0 = y);
paulo@89:     };
paulo@89:     function nextPoint(x, y) {
paulo@89:       var dx = x - x0, dy = y - y0, z = Math.sqrt(dx * dx + dy * dy);
paulo@89:       d3_geo_centroidX1 += z * (x0 + x) / 2;
paulo@89:       d3_geo_centroidY1 += z * (y0 + y) / 2;
paulo@89:       d3_geo_centroidZ1 += z;
paulo@89:       d3_geo_pathCentroidPoint(x0 = x, y0 = y);
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_geo_pathCentroidLineEnd() {
paulo@89:     d3_geo_pathCentroid.point = d3_geo_pathCentroidPoint;
paulo@89:   }
paulo@89:   function d3_geo_pathCentroidRingStart() {
paulo@89:     var x00, y00, x0, y0;
paulo@89:     d3_geo_pathCentroid.point = function(x, y) {
paulo@89:       d3_geo_pathCentroid.point = nextPoint;
paulo@89:       d3_geo_pathCentroidPoint(x00 = x0 = x, y00 = y0 = y);
paulo@89:     };
paulo@89:     function nextPoint(x, y) {
paulo@89:       var dx = x - x0, dy = y - y0, z = Math.sqrt(dx * dx + dy * dy);
paulo@89:       d3_geo_centroidX1 += z * (x0 + x) / 2;
paulo@89:       d3_geo_centroidY1 += z * (y0 + y) / 2;
paulo@89:       d3_geo_centroidZ1 += z;
paulo@89:       z = y0 * x - x0 * y;
paulo@89:       d3_geo_centroidX2 += z * (x0 + x);
paulo@89:       d3_geo_centroidY2 += z * (y0 + y);
paulo@89:       d3_geo_centroidZ2 += z * 3;
paulo@89:       d3_geo_pathCentroidPoint(x0 = x, y0 = y);
paulo@89:     }
paulo@89:     d3_geo_pathCentroid.lineEnd = function() {
paulo@89:       nextPoint(x00, y00);
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_geo_pathContext(context) {
paulo@89:     var pointRadius = 4.5;
paulo@89:     var stream = {
paulo@89:       point: point,
paulo@89:       lineStart: function() {
paulo@89:         stream.point = pointLineStart;
paulo@89:       },
paulo@89:       lineEnd: lineEnd,
paulo@89:       polygonStart: function() {
paulo@89:         stream.lineEnd = lineEndPolygon;
paulo@89:       },
paulo@89:       polygonEnd: function() {
paulo@89:         stream.lineEnd = lineEnd;
paulo@89:         stream.point = point;
paulo@89:       },
paulo@89:       pointRadius: function(_) {
paulo@89:         pointRadius = _;
paulo@89:         return stream;
paulo@89:       },
paulo@89:       result: d3_noop
paulo@89:     };
paulo@89:     function point(x, y) {
paulo@89:       context.moveTo(x + pointRadius, y);
paulo@89:       context.arc(x, y, pointRadius, 0, τ);
paulo@89:     }
paulo@89:     function pointLineStart(x, y) {
paulo@89:       context.moveTo(x, y);
paulo@89:       stream.point = pointLine;
paulo@89:     }
paulo@89:     function pointLine(x, y) {
paulo@89:       context.lineTo(x, y);
paulo@89:     }
paulo@89:     function lineEnd() {
paulo@89:       stream.point = point;
paulo@89:     }
paulo@89:     function lineEndPolygon() {
paulo@89:       context.closePath();
paulo@89:     }
paulo@89:     return stream;
paulo@89:   }
paulo@89:   function d3_geo_resample(project) {
paulo@89:     var δ2 = .5, cosMinDistance = Math.cos(30 * d3_radians), maxDepth = 16;
paulo@89:     function resample(stream) {
paulo@89:       return (maxDepth ? resampleRecursive : resampleNone)(stream);
paulo@89:     }
paulo@89:     function resampleNone(stream) {
paulo@89:       return d3_geo_transformPoint(stream, function(x, y) {
paulo@89:         x = project(x, y);
paulo@89:         stream.point(x[0], x[1]);
paulo@89:       });
paulo@89:     }
paulo@89:     function resampleRecursive(stream) {
paulo@89:       var λ00, φ00, x00, y00, a00, b00, c00, λ0, x0, y0, a0, b0, c0;
paulo@89:       var resample = {
paulo@89:         point: point,
paulo@89:         lineStart: lineStart,
paulo@89:         lineEnd: lineEnd,
paulo@89:         polygonStart: function() {
paulo@89:           stream.polygonStart();
paulo@89:           resample.lineStart = ringStart;
paulo@89:         },
paulo@89:         polygonEnd: function() {
paulo@89:           stream.polygonEnd();
paulo@89:           resample.lineStart = lineStart;
paulo@89:         }
paulo@89:       };
paulo@89:       function point(x, y) {
paulo@89:         x = project(x, y);
paulo@89:         stream.point(x[0], x[1]);
paulo@89:       }
paulo@89:       function lineStart() {
paulo@89:         x0 = NaN;
paulo@89:         resample.point = linePoint;
paulo@89:         stream.lineStart();
paulo@89:       }
paulo@89:       function linePoint(λ, φ) {
paulo@89:         var c = d3_geo_cartesian([ λ, φ ]), p = project(λ, φ);
paulo@89:         resampleLineTo(x0, y0, λ0, a0, b0, c0, x0 = p[0], y0 = p[1], λ0 = λ, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
paulo@89:         stream.point(x0, y0);
paulo@89:       }
paulo@89:       function lineEnd() {
paulo@89:         resample.point = point;
paulo@89:         stream.lineEnd();
paulo@89:       }
paulo@89:       function ringStart() {
paulo@89:         lineStart();
paulo@89:         resample.point = ringPoint;
paulo@89:         resample.lineEnd = ringEnd;
paulo@89:       }
paulo@89:       function ringPoint(λ, φ) {
paulo@89:         linePoint(λ00 = λ, φ00 = φ), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
paulo@89:         resample.point = linePoint;
paulo@89:       }
paulo@89:       function ringEnd() {
paulo@89:         resampleLineTo(x0, y0, λ0, a0, b0, c0, x00, y00, λ00, a00, b00, c00, maxDepth, stream);
paulo@89:         resample.lineEnd = lineEnd;
paulo@89:         lineEnd();
paulo@89:       }
paulo@89:       return resample;
paulo@89:     }
paulo@89:     function resampleLineTo(x0, y0, λ0, a0, b0, c0, x1, y1, λ1, a1, b1, c1, depth, stream) {
paulo@89:       var dx = x1 - x0, dy = y1 - y0, d2 = dx * dx + dy * dy;
paulo@89:       if (d2 > 4 * δ2 && depth--) {
paulo@89:         var a = a0 + a1, b = b0 + b1, c = c0 + c1, m = Math.sqrt(a * a + b * b + c * c), φ2 = Math.asin(c /= m), λ2 = abs(abs(c) - 1) < ε || abs(λ0 - λ1) < ε ? (λ0 + λ1) / 2 : Math.atan2(b, a), p = project(λ2, φ2), x2 = p[0], y2 = p[1], dx2 = x2 - x0, dy2 = y2 - y0, dz = dy * dx2 - dx * dy2;
paulo@89:         if (dz * dz / d2 > δ2 || abs((dx * dx2 + dy * dy2) / d2 - .5) > .3 || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) {
paulo@89:           resampleLineTo(x0, y0, λ0, a0, b0, c0, x2, y2, λ2, a /= m, b /= m, c, depth, stream);
paulo@89:           stream.point(x2, y2);
paulo@89:           resampleLineTo(x2, y2, λ2, a, b, c, x1, y1, λ1, a1, b1, c1, depth, stream);
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     resample.precision = function(_) {
paulo@89:       if (!arguments.length) return Math.sqrt(δ2);
paulo@89:       maxDepth = (δ2 = _ * _) > 0 && 16;
paulo@89:       return resample;
paulo@89:     };
paulo@89:     return resample;
paulo@89:   }
paulo@89:   d3.geo.path = function() {
paulo@89:     var pointRadius = 4.5, projection, context, projectStream, contextStream, cacheStream;
paulo@89:     function path(object) {
paulo@89:       if (object) {
paulo@89:         if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
paulo@89:         if (!cacheStream || !cacheStream.valid) cacheStream = projectStream(contextStream);
paulo@89:         d3.geo.stream(object, cacheStream);
paulo@89:       }
paulo@89:       return contextStream.result();
paulo@89:     }
paulo@89:     path.area = function(object) {
paulo@89:       d3_geo_pathAreaSum = 0;
paulo@89:       d3.geo.stream(object, projectStream(d3_geo_pathArea));
paulo@89:       return d3_geo_pathAreaSum;
paulo@89:     };
paulo@89:     path.centroid = function(object) {
paulo@89:       d3_geo_centroidX0 = d3_geo_centroidY0 = d3_geo_centroidZ0 = d3_geo_centroidX1 = d3_geo_centroidY1 = d3_geo_centroidZ1 = d3_geo_centroidX2 = d3_geo_centroidY2 = d3_geo_centroidZ2 = 0;
paulo@89:       d3.geo.stream(object, projectStream(d3_geo_pathCentroid));
paulo@89:       return d3_geo_centroidZ2 ? [ d3_geo_centroidX2 / d3_geo_centroidZ2, d3_geo_centroidY2 / d3_geo_centroidZ2 ] : d3_geo_centroidZ1 ? [ d3_geo_centroidX1 / d3_geo_centroidZ1, d3_geo_centroidY1 / d3_geo_centroidZ1 ] : d3_geo_centroidZ0 ? [ d3_geo_centroidX0 / d3_geo_centroidZ0, d3_geo_centroidY0 / d3_geo_centroidZ0 ] : [ NaN, NaN ];
paulo@89:     };
paulo@89:     path.bounds = function(object) {
paulo@89:       d3_geo_pathBoundsX1 = d3_geo_pathBoundsY1 = -(d3_geo_pathBoundsX0 = d3_geo_pathBoundsY0 = Infinity);
paulo@89:       d3.geo.stream(object, projectStream(d3_geo_pathBounds));
paulo@89:       return [ [ d3_geo_pathBoundsX0, d3_geo_pathBoundsY0 ], [ d3_geo_pathBoundsX1, d3_geo_pathBoundsY1 ] ];
paulo@89:     };
paulo@89:     path.projection = function(_) {
paulo@89:       if (!arguments.length) return projection;
paulo@89:       projectStream = (projection = _) ? _.stream || d3_geo_pathProjectStream(_) : d3_identity;
paulo@89:       return reset();
paulo@89:     };
paulo@89:     path.context = function(_) {
paulo@89:       if (!arguments.length) return context;
paulo@89:       contextStream = (context = _) == null ? new d3_geo_pathBuffer() : new d3_geo_pathContext(_);
paulo@89:       if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
paulo@89:       return reset();
paulo@89:     };
paulo@89:     path.pointRadius = function(_) {
paulo@89:       if (!arguments.length) return pointRadius;
paulo@89:       pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
paulo@89:       return path;
paulo@89:     };
paulo@89:     function reset() {
paulo@89:       cacheStream = null;
paulo@89:       return path;
paulo@89:     }
paulo@89:     return path.projection(d3.geo.albersUsa()).context(null);
paulo@89:   };
paulo@89:   function d3_geo_pathProjectStream(project) {
paulo@89:     var resample = d3_geo_resample(function(x, y) {
paulo@89:       return project([ x * d3_degrees, y * d3_degrees ]);
paulo@89:     });
paulo@89:     return function(stream) {
paulo@89:       return d3_geo_projectionRadians(resample(stream));
paulo@89:     };
paulo@89:   }
paulo@89:   d3.geo.transform = function(methods) {
paulo@89:     return {
paulo@89:       stream: function(stream) {
paulo@89:         var transform = new d3_geo_transform(stream);
paulo@89:         for (var k in methods) transform[k] = methods[k];
paulo@89:         return transform;
paulo@89:       }
paulo@89:     };
paulo@89:   };
paulo@89:   function d3_geo_transform(stream) {
paulo@89:     this.stream = stream;
paulo@89:   }
paulo@89:   d3_geo_transform.prototype = {
paulo@89:     point: function(x, y) {
paulo@89:       this.stream.point(x, y);
paulo@89:     },
paulo@89:     sphere: function() {
paulo@89:       this.stream.sphere();
paulo@89:     },
paulo@89:     lineStart: function() {
paulo@89:       this.stream.lineStart();
paulo@89:     },
paulo@89:     lineEnd: function() {
paulo@89:       this.stream.lineEnd();
paulo@89:     },
paulo@89:     polygonStart: function() {
paulo@89:       this.stream.polygonStart();
paulo@89:     },
paulo@89:     polygonEnd: function() {
paulo@89:       this.stream.polygonEnd();
paulo@89:     }
paulo@89:   };
paulo@89:   function d3_geo_transformPoint(stream, point) {
paulo@89:     return {
paulo@89:       point: point,
paulo@89:       sphere: function() {
paulo@89:         stream.sphere();
paulo@89:       },
paulo@89:       lineStart: function() {
paulo@89:         stream.lineStart();
paulo@89:       },
paulo@89:       lineEnd: function() {
paulo@89:         stream.lineEnd();
paulo@89:       },
paulo@89:       polygonStart: function() {
paulo@89:         stream.polygonStart();
paulo@89:       },
paulo@89:       polygonEnd: function() {
paulo@89:         stream.polygonEnd();
paulo@89:       }
paulo@89:     };
paulo@89:   }
paulo@89:   d3.geo.projection = d3_geo_projection;
paulo@89:   d3.geo.projectionMutator = d3_geo_projectionMutator;
paulo@89:   function d3_geo_projection(project) {
paulo@89:     return d3_geo_projectionMutator(function() {
paulo@89:       return project;
paulo@89:     })();
paulo@89:   }
paulo@89:   function d3_geo_projectionMutator(projectAt) {
paulo@89:     var project, rotate, projectRotate, projectResample = d3_geo_resample(function(x, y) {
paulo@89:       x = project(x, y);
paulo@89:       return [ x[0] * k + δx, δy - x[1] * k ];
paulo@89:     }), k = 150, x = 480, y = 250, λ = 0, φ = 0, δλ = 0, δφ = 0, δγ = 0, δx, δy, preclip = d3_geo_clipAntimeridian, postclip = d3_identity, clipAngle = null, clipExtent = null, stream;
paulo@89:     function projection(point) {
paulo@89:       point = projectRotate(point[0] * d3_radians, point[1] * d3_radians);
paulo@89:       return [ point[0] * k + δx, δy - point[1] * k ];
paulo@89:     }
paulo@89:     function invert(point) {
paulo@89:       point = projectRotate.invert((point[0] - δx) / k, (δy - point[1]) / k);
paulo@89:       return point && [ point[0] * d3_degrees, point[1] * d3_degrees ];
paulo@89:     }
paulo@89:     projection.stream = function(output) {
paulo@89:       if (stream) stream.valid = false;
paulo@89:       stream = d3_geo_projectionRadians(preclip(rotate, projectResample(postclip(output))));
paulo@89:       stream.valid = true;
paulo@89:       return stream;
paulo@89:     };
paulo@89:     projection.clipAngle = function(_) {
paulo@89:       if (!arguments.length) return clipAngle;
paulo@89:       preclip = _ == null ? (clipAngle = _, d3_geo_clipAntimeridian) : d3_geo_clipCircle((clipAngle = +_) * d3_radians);
paulo@89:       return invalidate();
paulo@89:     };
paulo@89:     projection.clipExtent = function(_) {
paulo@89:       if (!arguments.length) return clipExtent;
paulo@89:       clipExtent = _;
paulo@89:       postclip = _ ? d3_geo_clipExtent(_[0][0], _[0][1], _[1][0], _[1][1]) : d3_identity;
paulo@89:       return invalidate();
paulo@89:     };
paulo@89:     projection.scale = function(_) {
paulo@89:       if (!arguments.length) return k;
paulo@89:       k = +_;
paulo@89:       return reset();
paulo@89:     };
paulo@89:     projection.translate = function(_) {
paulo@89:       if (!arguments.length) return [ x, y ];
paulo@89:       x = +_[0];
paulo@89:       y = +_[1];
paulo@89:       return reset();
paulo@89:     };
paulo@89:     projection.center = function(_) {
paulo@89:       if (!arguments.length) return [ λ * d3_degrees, φ * d3_degrees ];
paulo@89:       λ = _[0] % 360 * d3_radians;
paulo@89:       φ = _[1] % 360 * d3_radians;
paulo@89:       return reset();
paulo@89:     };
paulo@89:     projection.rotate = function(_) {
paulo@89:       if (!arguments.length) return [ δλ * d3_degrees, δφ * d3_degrees, δγ * d3_degrees ];
paulo@89:       δλ = _[0] % 360 * d3_radians;
paulo@89:       δφ = _[1] % 360 * d3_radians;
paulo@89:       δγ = _.length > 2 ? _[2] % 360 * d3_radians : 0;
paulo@89:       return reset();
paulo@89:     };
paulo@89:     d3.rebind(projection, projectResample, "precision");
paulo@89:     function reset() {
paulo@89:       projectRotate = d3_geo_compose(rotate = d3_geo_rotation(δλ, δφ, δγ), project);
paulo@89:       var center = project(λ, φ);
paulo@89:       δx = x - center[0] * k;
paulo@89:       δy = y + center[1] * k;
paulo@89:       return invalidate();
paulo@89:     }
paulo@89:     function invalidate() {
paulo@89:       if (stream) stream.valid = false, stream = null;
paulo@89:       return projection;
paulo@89:     }
paulo@89:     return function() {
paulo@89:       project = projectAt.apply(this, arguments);
paulo@89:       projection.invert = project.invert && invert;
paulo@89:       return reset();
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_geo_projectionRadians(stream) {
paulo@89:     return d3_geo_transformPoint(stream, function(x, y) {
paulo@89:       stream.point(x * d3_radians, y * d3_radians);
paulo@89:     });
paulo@89:   }
paulo@89:   function d3_geo_equirectangular(λ, φ) {
paulo@89:     return [ λ, φ ];
paulo@89:   }
paulo@89:   (d3.geo.equirectangular = function() {
paulo@89:     return d3_geo_projection(d3_geo_equirectangular);
paulo@89:   }).raw = d3_geo_equirectangular.invert = d3_geo_equirectangular;
paulo@89:   d3.geo.rotation = function(rotate) {
paulo@89:     rotate = d3_geo_rotation(rotate[0] % 360 * d3_radians, rotate[1] * d3_radians, rotate.length > 2 ? rotate[2] * d3_radians : 0);
paulo@89:     function forward(coordinates) {
paulo@89:       coordinates = rotate(coordinates[0] * d3_radians, coordinates[1] * d3_radians);
paulo@89:       return coordinates[0] *= d3_degrees, coordinates[1] *= d3_degrees, coordinates;
paulo@89:     }
paulo@89:     forward.invert = function(coordinates) {
paulo@89:       coordinates = rotate.invert(coordinates[0] * d3_radians, coordinates[1] * d3_radians);
paulo@89:       return coordinates[0] *= d3_degrees, coordinates[1] *= d3_degrees, coordinates;
paulo@89:     };
paulo@89:     return forward;
paulo@89:   };
paulo@89:   function d3_geo_identityRotation(λ, φ) {
paulo@89:     return [ λ > π ? λ - τ : λ < -π ? λ + τ : λ, φ ];
paulo@89:   }
paulo@89:   d3_geo_identityRotation.invert = d3_geo_equirectangular;
paulo@89:   function d3_geo_rotation(δλ, δφ, δγ) {
paulo@89:     return δλ ? δφ || δγ ? d3_geo_compose(d3_geo_rotationλ(δλ), d3_geo_rotationφγ(δφ, δγ)) : d3_geo_rotationλ(δλ) : δφ || δγ ? d3_geo_rotationφγ(δφ, δγ) : d3_geo_identityRotation;
paulo@89:   }
paulo@89:   function d3_geo_forwardRotationλ(δλ) {
paulo@89:     return function(λ, φ) {
paulo@89:       return λ += δλ, [ λ > π ? λ - τ : λ < -π ? λ + τ : λ, φ ];
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_geo_rotationλ(δλ) {
paulo@89:     var rotation = d3_geo_forwardRotationλ(δλ);
paulo@89:     rotation.invert = d3_geo_forwardRotationλ(-δλ);
paulo@89:     return rotation;
paulo@89:   }
paulo@89:   function d3_geo_rotationφγ(δφ, δγ) {
paulo@89:     var cosδφ = Math.cos(δφ), sinδφ = Math.sin(δφ), cosδγ = Math.cos(δγ), sinδγ = Math.sin(δγ);
paulo@89:     function rotation(λ, φ) {
paulo@89:       var cosφ = Math.cos(φ), x = Math.cos(λ) * cosφ, y = Math.sin(λ) * cosφ, z = Math.sin(φ), k = z * cosδφ + x * sinδφ;
paulo@89:       return [ Math.atan2(y * cosδγ - k * sinδγ, x * cosδφ - z * sinδφ), d3_asin(k * cosδγ + y * sinδγ) ];
paulo@89:     }
paulo@89:     rotation.invert = function(λ, φ) {
paulo@89:       var cosφ = Math.cos(φ), x = Math.cos(λ) * cosφ, y = Math.sin(λ) * cosφ, z = Math.sin(φ), k = z * cosδγ - y * sinδγ;
paulo@89:       return [ Math.atan2(y * cosδγ + z * sinδγ, x * cosδφ + k * sinδφ), d3_asin(k * cosδφ - x * sinδφ) ];
paulo@89:     };
paulo@89:     return rotation;
paulo@89:   }
paulo@89:   d3.geo.circle = function() {
paulo@89:     var origin = [ 0, 0 ], angle, precision = 6, interpolate;
paulo@89:     function circle() {
paulo@89:       var center = typeof origin === "function" ? origin.apply(this, arguments) : origin, rotate = d3_geo_rotation(-center[0] * d3_radians, -center[1] * d3_radians, 0).invert, ring = [];
paulo@89:       interpolate(null, null, 1, {
paulo@89:         point: function(x, y) {
paulo@89:           ring.push(x = rotate(x, y));
paulo@89:           x[0] *= d3_degrees, x[1] *= d3_degrees;
paulo@89:         }
paulo@89:       });
paulo@89:       return {
paulo@89:         type: "Polygon",
paulo@89:         coordinates: [ ring ]
paulo@89:       };
paulo@89:     }
paulo@89:     circle.origin = function(x) {
paulo@89:       if (!arguments.length) return origin;
paulo@89:       origin = x;
paulo@89:       return circle;
paulo@89:     };
paulo@89:     circle.angle = function(x) {
paulo@89:       if (!arguments.length) return angle;
paulo@89:       interpolate = d3_geo_circleInterpolate((angle = +x) * d3_radians, precision * d3_radians);
paulo@89:       return circle;
paulo@89:     };
paulo@89:     circle.precision = function(_) {
paulo@89:       if (!arguments.length) return precision;
paulo@89:       interpolate = d3_geo_circleInterpolate(angle * d3_radians, (precision = +_) * d3_radians);
paulo@89:       return circle;
paulo@89:     };
paulo@89:     return circle.angle(90);
paulo@89:   };
paulo@89:   function d3_geo_circleInterpolate(radius, precision) {
paulo@89:     var cr = Math.cos(radius), sr = Math.sin(radius);
paulo@89:     return function(from, to, direction, listener) {
paulo@89:       var step = direction * precision;
paulo@89:       if (from != null) {
paulo@89:         from = d3_geo_circleAngle(cr, from);
paulo@89:         to = d3_geo_circleAngle(cr, to);
paulo@89:         if (direction > 0 ? from < to : from > to) from += direction * τ;
paulo@89:       } else {
paulo@89:         from = radius + direction * τ;
paulo@89:         to = radius - .5 * step;
paulo@89:       }
paulo@89:       for (var point, t = from; direction > 0 ? t > to : t < to; t -= step) {
paulo@89:         listener.point((point = d3_geo_spherical([ cr, -sr * Math.cos(t), -sr * Math.sin(t) ]))[0], point[1]);
paulo@89:       }
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_geo_circleAngle(cr, point) {
paulo@89:     var a = d3_geo_cartesian(point);
paulo@89:     a[0] -= cr;
paulo@89:     d3_geo_cartesianNormalize(a);
paulo@89:     var angle = d3_acos(-a[1]);
paulo@89:     return ((-a[2] < 0 ? -angle : angle) + 2 * Math.PI - ε) % (2 * Math.PI);
paulo@89:   }
paulo@89:   d3.geo.distance = function(a, b) {
paulo@89:     var Δλ = (b[0] - a[0]) * d3_radians, φ0 = a[1] * d3_radians, φ1 = b[1] * d3_radians, sinΔλ = Math.sin(Δλ), cosΔλ = Math.cos(Δλ), sinφ0 = Math.sin(φ0), cosφ0 = Math.cos(φ0), sinφ1 = Math.sin(φ1), cosφ1 = Math.cos(φ1), t;
paulo@89:     return Math.atan2(Math.sqrt((t = cosφ1 * sinΔλ) * t + (t = cosφ0 * sinφ1 - sinφ0 * cosφ1 * cosΔλ) * t), sinφ0 * sinφ1 + cosφ0 * cosφ1 * cosΔλ);
paulo@89:   };
paulo@89:   d3.geo.graticule = function() {
paulo@89:     var x1, x0, X1, X0, y1, y0, Y1, Y0, dx = 10, dy = dx, DX = 90, DY = 360, x, y, X, Y, precision = 2.5;
paulo@89:     function graticule() {
paulo@89:       return {
paulo@89:         type: "MultiLineString",
paulo@89:         coordinates: lines()
paulo@89:       };
paulo@89:     }
paulo@89:     function lines() {
paulo@89:       return d3.range(Math.ceil(X0 / DX) * DX, X1, DX).map(X).concat(d3.range(Math.ceil(Y0 / DY) * DY, Y1, DY).map(Y)).concat(d3.range(Math.ceil(x0 / dx) * dx, x1, dx).filter(function(x) {
paulo@89:         return abs(x % DX) > ε;
paulo@89:       }).map(x)).concat(d3.range(Math.ceil(y0 / dy) * dy, y1, dy).filter(function(y) {
paulo@89:         return abs(y % DY) > ε;
paulo@89:       }).map(y));
paulo@89:     }
paulo@89:     graticule.lines = function() {
paulo@89:       return lines().map(function(coordinates) {
paulo@89:         return {
paulo@89:           type: "LineString",
paulo@89:           coordinates: coordinates
paulo@89:         };
paulo@89:       });
paulo@89:     };
paulo@89:     graticule.outline = function() {
paulo@89:       return {
paulo@89:         type: "Polygon",
paulo@89:         coordinates: [ X(X0).concat(Y(Y1).slice(1), X(X1).reverse().slice(1), Y(Y0).reverse().slice(1)) ]
paulo@89:       };
paulo@89:     };
paulo@89:     graticule.extent = function(_) {
paulo@89:       if (!arguments.length) return graticule.minorExtent();
paulo@89:       return graticule.majorExtent(_).minorExtent(_);
paulo@89:     };
paulo@89:     graticule.majorExtent = function(_) {
paulo@89:       if (!arguments.length) return [ [ X0, Y0 ], [ X1, Y1 ] ];
paulo@89:       X0 = +_[0][0], X1 = +_[1][0];
paulo@89:       Y0 = +_[0][1], Y1 = +_[1][1];
paulo@89:       if (X0 > X1) _ = X0, X0 = X1, X1 = _;
paulo@89:       if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;
paulo@89:       return graticule.precision(precision);
paulo@89:     };
paulo@89:     graticule.minorExtent = function(_) {
paulo@89:       if (!arguments.length) return [ [ x0, y0 ], [ x1, y1 ] ];
paulo@89:       x0 = +_[0][0], x1 = +_[1][0];
paulo@89:       y0 = +_[0][1], y1 = +_[1][1];
paulo@89:       if (x0 > x1) _ = x0, x0 = x1, x1 = _;
paulo@89:       if (y0 > y1) _ = y0, y0 = y1, y1 = _;
paulo@89:       return graticule.precision(precision);
paulo@89:     };
paulo@89:     graticule.step = function(_) {
paulo@89:       if (!arguments.length) return graticule.minorStep();
paulo@89:       return graticule.majorStep(_).minorStep(_);
paulo@89:     };
paulo@89:     graticule.majorStep = function(_) {
paulo@89:       if (!arguments.length) return [ DX, DY ];
paulo@89:       DX = +_[0], DY = +_[1];
paulo@89:       return graticule;
paulo@89:     };
paulo@89:     graticule.minorStep = function(_) {
paulo@89:       if (!arguments.length) return [ dx, dy ];
paulo@89:       dx = +_[0], dy = +_[1];
paulo@89:       return graticule;
paulo@89:     };
paulo@89:     graticule.precision = function(_) {
paulo@89:       if (!arguments.length) return precision;
paulo@89:       precision = +_;
paulo@89:       x = d3_geo_graticuleX(y0, y1, 90);
paulo@89:       y = d3_geo_graticuleY(x0, x1, precision);
paulo@89:       X = d3_geo_graticuleX(Y0, Y1, 90);
paulo@89:       Y = d3_geo_graticuleY(X0, X1, precision);
paulo@89:       return graticule;
paulo@89:     };
paulo@89:     return graticule.majorExtent([ [ -180, -90 + ε ], [ 180, 90 - ε ] ]).minorExtent([ [ -180, -80 - ε ], [ 180, 80 + ε ] ]);
paulo@89:   };
paulo@89:   function d3_geo_graticuleX(y0, y1, dy) {
paulo@89:     var y = d3.range(y0, y1 - ε, dy).concat(y1);
paulo@89:     return function(x) {
paulo@89:       return y.map(function(y) {
paulo@89:         return [ x, y ];
paulo@89:       });
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_geo_graticuleY(x0, x1, dx) {
paulo@89:     var x = d3.range(x0, x1 - ε, dx).concat(x1);
paulo@89:     return function(y) {
paulo@89:       return x.map(function(x) {
paulo@89:         return [ x, y ];
paulo@89:       });
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_source(d) {
paulo@89:     return d.source;
paulo@89:   }
paulo@89:   function d3_target(d) {
paulo@89:     return d.target;
paulo@89:   }
paulo@89:   d3.geo.greatArc = function() {
paulo@89:     var source = d3_source, source_, target = d3_target, target_;
paulo@89:     function greatArc() {
paulo@89:       return {
paulo@89:         type: "LineString",
paulo@89:         coordinates: [ source_ || source.apply(this, arguments), target_ || target.apply(this, arguments) ]
paulo@89:       };
paulo@89:     }
paulo@89:     greatArc.distance = function() {
paulo@89:       return d3.geo.distance(source_ || source.apply(this, arguments), target_ || target.apply(this, arguments));
paulo@89:     };
paulo@89:     greatArc.source = function(_) {
paulo@89:       if (!arguments.length) return source;
paulo@89:       source = _, source_ = typeof _ === "function" ? null : _;
paulo@89:       return greatArc;
paulo@89:     };
paulo@89:     greatArc.target = function(_) {
paulo@89:       if (!arguments.length) return target;
paulo@89:       target = _, target_ = typeof _ === "function" ? null : _;
paulo@89:       return greatArc;
paulo@89:     };
paulo@89:     greatArc.precision = function() {
paulo@89:       return arguments.length ? greatArc : 0;
paulo@89:     };
paulo@89:     return greatArc;
paulo@89:   };
paulo@89:   d3.geo.interpolate = function(source, target) {
paulo@89:     return d3_geo_interpolate(source[0] * d3_radians, source[1] * d3_radians, target[0] * d3_radians, target[1] * d3_radians);
paulo@89:   };
paulo@89:   function d3_geo_interpolate(x0, y0, x1, y1) {
paulo@89:     var cy0 = Math.cos(y0), sy0 = Math.sin(y0), cy1 = Math.cos(y1), sy1 = Math.sin(y1), kx0 = cy0 * Math.cos(x0), ky0 = cy0 * Math.sin(x0), kx1 = cy1 * Math.cos(x1), ky1 = cy1 * Math.sin(x1), d = 2 * Math.asin(Math.sqrt(d3_haversin(y1 - y0) + cy0 * cy1 * d3_haversin(x1 - x0))), k = 1 / Math.sin(d);
paulo@89:     var interpolate = d ? function(t) {
paulo@89:       var B = Math.sin(t *= d) * k, A = Math.sin(d - t) * k, x = A * kx0 + B * kx1, y = A * ky0 + B * ky1, z = A * sy0 + B * sy1;
paulo@89:       return [ Math.atan2(y, x) * d3_degrees, Math.atan2(z, Math.sqrt(x * x + y * y)) * d3_degrees ];
paulo@89:     } : function() {
paulo@89:       return [ x0 * d3_degrees, y0 * d3_degrees ];
paulo@89:     };
paulo@89:     interpolate.distance = d;
paulo@89:     return interpolate;
paulo@89:   }
paulo@89:   d3.geo.length = function(object) {
paulo@89:     d3_geo_lengthSum = 0;
paulo@89:     d3.geo.stream(object, d3_geo_length);
paulo@89:     return d3_geo_lengthSum;
paulo@89:   };
paulo@89:   var d3_geo_lengthSum;
paulo@89:   var d3_geo_length = {
paulo@89:     sphere: d3_noop,
paulo@89:     point: d3_noop,
paulo@89:     lineStart: d3_geo_lengthLineStart,
paulo@89:     lineEnd: d3_noop,
paulo@89:     polygonStart: d3_noop,
paulo@89:     polygonEnd: d3_noop
paulo@89:   };
paulo@89:   function d3_geo_lengthLineStart() {
paulo@89:     var λ0, sinφ0, cosφ0;
paulo@89:     d3_geo_length.point = function(λ, φ) {
paulo@89:       λ0 = λ * d3_radians, sinφ0 = Math.sin(φ *= d3_radians), cosφ0 = Math.cos(φ);
paulo@89:       d3_geo_length.point = nextPoint;
paulo@89:     };
paulo@89:     d3_geo_length.lineEnd = function() {
paulo@89:       d3_geo_length.point = d3_geo_length.lineEnd = d3_noop;
paulo@89:     };
paulo@89:     function nextPoint(λ, φ) {
paulo@89:       var sinφ = Math.sin(φ *= d3_radians), cosφ = Math.cos(φ), t = abs((λ *= d3_radians) - λ0), cosΔλ = Math.cos(t);
paulo@89:       d3_geo_lengthSum += Math.atan2(Math.sqrt((t = cosφ * Math.sin(t)) * t + (t = cosφ0 * sinφ - sinφ0 * cosφ * cosΔλ) * t), sinφ0 * sinφ + cosφ0 * cosφ * cosΔλ);
paulo@89:       λ0 = λ, sinφ0 = sinφ, cosφ0 = cosφ;
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_geo_azimuthal(scale, angle) {
paulo@89:     function azimuthal(λ, φ) {
paulo@89:       var cosλ = Math.cos(λ), cosφ = Math.cos(φ), k = scale(cosλ * cosφ);
paulo@89:       return [ k * cosφ * Math.sin(λ), k * Math.sin(φ) ];
paulo@89:     }
paulo@89:     azimuthal.invert = function(x, y) {
paulo@89:       var ρ = Math.sqrt(x * x + y * y), c = angle(ρ), sinc = Math.sin(c), cosc = Math.cos(c);
paulo@89:       return [ Math.atan2(x * sinc, ρ * cosc), Math.asin(ρ && y * sinc / ρ) ];
paulo@89:     };
paulo@89:     return azimuthal;
paulo@89:   }
paulo@89:   var d3_geo_azimuthalEqualArea = d3_geo_azimuthal(function(cosλcosφ) {
paulo@89:     return Math.sqrt(2 / (1 + cosλcosφ));
paulo@89:   }, function(ρ) {
paulo@89:     return 2 * Math.asin(ρ / 2);
paulo@89:   });
paulo@89:   (d3.geo.azimuthalEqualArea = function() {
paulo@89:     return d3_geo_projection(d3_geo_azimuthalEqualArea);
paulo@89:   }).raw = d3_geo_azimuthalEqualArea;
paulo@89:   var d3_geo_azimuthalEquidistant = d3_geo_azimuthal(function(cosλcosφ) {
paulo@89:     var c = Math.acos(cosλcosφ);
paulo@89:     return c && c / Math.sin(c);
paulo@89:   }, d3_identity);
paulo@89:   (d3.geo.azimuthalEquidistant = function() {
paulo@89:     return d3_geo_projection(d3_geo_azimuthalEquidistant);
paulo@89:   }).raw = d3_geo_azimuthalEquidistant;
paulo@89:   function d3_geo_conicConformal(φ0, φ1) {
paulo@89:     var cosφ0 = Math.cos(φ0), t = function(φ) {
paulo@89:       return Math.tan(π / 4 + φ / 2);
paulo@89:     }, n = φ0 === φ1 ? Math.sin(φ0) : Math.log(cosφ0 / Math.cos(φ1)) / Math.log(t(φ1) / t(φ0)), F = cosφ0 * Math.pow(t(φ0), n) / n;
paulo@89:     if (!n) return d3_geo_mercator;
paulo@89:     function forward(λ, φ) {
paulo@89:       if (F > 0) {
paulo@89:         if (φ < -halfπ + ε) φ = -halfπ + ε;
paulo@89:       } else {
paulo@89:         if (φ > halfπ - ε) φ = halfπ - ε;
paulo@89:       }
paulo@89:       var ρ = F / Math.pow(t(φ), n);
paulo@89:       return [ ρ * Math.sin(n * λ), F - ρ * Math.cos(n * λ) ];
paulo@89:     }
paulo@89:     forward.invert = function(x, y) {
paulo@89:       var ρ0_y = F - y, ρ = d3_sgn(n) * Math.sqrt(x * x + ρ0_y * ρ0_y);
paulo@89:       return [ Math.atan2(x, ρ0_y) / n, 2 * Math.atan(Math.pow(F / ρ, 1 / n)) - halfπ ];
paulo@89:     };
paulo@89:     return forward;
paulo@89:   }
paulo@89:   (d3.geo.conicConformal = function() {
paulo@89:     return d3_geo_conic(d3_geo_conicConformal);
paulo@89:   }).raw = d3_geo_conicConformal;
paulo@89:   function d3_geo_conicEquidistant(φ0, φ1) {
paulo@89:     var cosφ0 = Math.cos(φ0), n = φ0 === φ1 ? Math.sin(φ0) : (cosφ0 - Math.cos(φ1)) / (φ1 - φ0), G = cosφ0 / n + φ0;
paulo@89:     if (abs(n) < ε) return d3_geo_equirectangular;
paulo@89:     function forward(λ, φ) {
paulo@89:       var ρ = G - φ;
paulo@89:       return [ ρ * Math.sin(n * λ), G - ρ * Math.cos(n * λ) ];
paulo@89:     }
paulo@89:     forward.invert = function(x, y) {
paulo@89:       var ρ0_y = G - y;
paulo@89:       return [ Math.atan2(x, ρ0_y) / n, G - d3_sgn(n) * Math.sqrt(x * x + ρ0_y * ρ0_y) ];
paulo@89:     };
paulo@89:     return forward;
paulo@89:   }
paulo@89:   (d3.geo.conicEquidistant = function() {
paulo@89:     return d3_geo_conic(d3_geo_conicEquidistant);
paulo@89:   }).raw = d3_geo_conicEquidistant;
paulo@89:   var d3_geo_gnomonic = d3_geo_azimuthal(function(cosλcosφ) {
paulo@89:     return 1 / cosλcosφ;
paulo@89:   }, Math.atan);
paulo@89:   (d3.geo.gnomonic = function() {
paulo@89:     return d3_geo_projection(d3_geo_gnomonic);
paulo@89:   }).raw = d3_geo_gnomonic;
paulo@89:   function d3_geo_mercator(λ, φ) {
paulo@89:     return [ λ, Math.log(Math.tan(π / 4 + φ / 2)) ];
paulo@89:   }
paulo@89:   d3_geo_mercator.invert = function(x, y) {
paulo@89:     return [ x, 2 * Math.atan(Math.exp(y)) - halfπ ];
paulo@89:   };
paulo@89:   function d3_geo_mercatorProjection(project) {
paulo@89:     var m = d3_geo_projection(project), scale = m.scale, translate = m.translate, clipExtent = m.clipExtent, clipAuto;
paulo@89:     m.scale = function() {
paulo@89:       var v = scale.apply(m, arguments);
paulo@89:       return v === m ? clipAuto ? m.clipExtent(null) : m : v;
paulo@89:     };
paulo@89:     m.translate = function() {
paulo@89:       var v = translate.apply(m, arguments);
paulo@89:       return v === m ? clipAuto ? m.clipExtent(null) : m : v;
paulo@89:     };
paulo@89:     m.clipExtent = function(_) {
paulo@89:       var v = clipExtent.apply(m, arguments);
paulo@89:       if (v === m) {
paulo@89:         if (clipAuto = _ == null) {
paulo@89:           var k = π * scale(), t = translate();
paulo@89:           clipExtent([ [ t[0] - k, t[1] - k ], [ t[0] + k, t[1] + k ] ]);
paulo@89:         }
paulo@89:       } else if (clipAuto) {
paulo@89:         v = null;
paulo@89:       }
paulo@89:       return v;
paulo@89:     };
paulo@89:     return m.clipExtent(null);
paulo@89:   }
paulo@89:   (d3.geo.mercator = function() {
paulo@89:     return d3_geo_mercatorProjection(d3_geo_mercator);
paulo@89:   }).raw = d3_geo_mercator;
paulo@89:   var d3_geo_orthographic = d3_geo_azimuthal(function() {
paulo@89:     return 1;
paulo@89:   }, Math.asin);
paulo@89:   (d3.geo.orthographic = function() {
paulo@89:     return d3_geo_projection(d3_geo_orthographic);
paulo@89:   }).raw = d3_geo_orthographic;
paulo@89:   var d3_geo_stereographic = d3_geo_azimuthal(function(cosλcosφ) {
paulo@89:     return 1 / (1 + cosλcosφ);
paulo@89:   }, function(ρ) {
paulo@89:     return 2 * Math.atan(ρ);
paulo@89:   });
paulo@89:   (d3.geo.stereographic = function() {
paulo@89:     return d3_geo_projection(d3_geo_stereographic);
paulo@89:   }).raw = d3_geo_stereographic;
paulo@89:   function d3_geo_transverseMercator(λ, φ) {
paulo@89:     return [ Math.log(Math.tan(π / 4 + φ / 2)), -λ ];
paulo@89:   }
paulo@89:   d3_geo_transverseMercator.invert = function(x, y) {
paulo@89:     return [ -y, 2 * Math.atan(Math.exp(x)) - halfπ ];
paulo@89:   };
paulo@89:   (d3.geo.transverseMercator = function() {
paulo@89:     var projection = d3_geo_mercatorProjection(d3_geo_transverseMercator), center = projection.center, rotate = projection.rotate;
paulo@89:     projection.center = function(_) {
paulo@89:       return _ ? center([ -_[1], _[0] ]) : (_ = center(), [ _[1], -_[0] ]);
paulo@89:     };
paulo@89:     projection.rotate = function(_) {
paulo@89:       return _ ? rotate([ _[0], _[1], _.length > 2 ? _[2] + 90 : 90 ]) : (_ = rotate(), 
paulo@89:       [ _[0], _[1], _[2] - 90 ]);
paulo@89:     };
paulo@89:     return rotate([ 0, 0, 90 ]);
paulo@89:   }).raw = d3_geo_transverseMercator;
paulo@89:   d3.geom = {};
paulo@89:   function d3_geom_pointX(d) {
paulo@89:     return d[0];
paulo@89:   }
paulo@89:   function d3_geom_pointY(d) {
paulo@89:     return d[1];
paulo@89:   }
paulo@89:   d3.geom.hull = function(vertices) {
paulo@89:     var x = d3_geom_pointX, y = d3_geom_pointY;
paulo@89:     if (arguments.length) return hull(vertices);
paulo@89:     function hull(data) {
paulo@89:       if (data.length < 3) return [];
paulo@89:       var fx = d3_functor(x), fy = d3_functor(y), i, n = data.length, points = [], flippedPoints = [];
paulo@89:       for (i = 0; i < n; i++) {
paulo@89:         points.push([ +fx.call(this, data[i], i), +fy.call(this, data[i], i), i ]);
paulo@89:       }
paulo@89:       points.sort(d3_geom_hullOrder);
paulo@89:       for (i = 0; i < n; i++) flippedPoints.push([ points[i][0], -points[i][1] ]);
paulo@89:       var upper = d3_geom_hullUpper(points), lower = d3_geom_hullUpper(flippedPoints);
paulo@89:       var skipLeft = lower[0] === upper[0], skipRight = lower[lower.length - 1] === upper[upper.length - 1], polygon = [];
paulo@89:       for (i = upper.length - 1; i >= 0; --i) polygon.push(data[points[upper[i]][2]]);
paulo@89:       for (i = +skipLeft; i < lower.length - skipRight; ++i) polygon.push(data[points[lower[i]][2]]);
paulo@89:       return polygon;
paulo@89:     }
paulo@89:     hull.x = function(_) {
paulo@89:       return arguments.length ? (x = _, hull) : x;
paulo@89:     };
paulo@89:     hull.y = function(_) {
paulo@89:       return arguments.length ? (y = _, hull) : y;
paulo@89:     };
paulo@89:     return hull;
paulo@89:   };
paulo@89:   function d3_geom_hullUpper(points) {
paulo@89:     var n = points.length, hull = [ 0, 1 ], hs = 2;
paulo@89:     for (var i = 2; i < n; i++) {
paulo@89:       while (hs > 1 && d3_cross2d(points[hull[hs - 2]], points[hull[hs - 1]], points[i]) <= 0) --hs;
paulo@89:       hull[hs++] = i;
paulo@89:     }
paulo@89:     return hull.slice(0, hs);
paulo@89:   }
paulo@89:   function d3_geom_hullOrder(a, b) {
paulo@89:     return a[0] - b[0] || a[1] - b[1];
paulo@89:   }
paulo@89:   d3.geom.polygon = function(coordinates) {
paulo@89:     d3_subclass(coordinates, d3_geom_polygonPrototype);
paulo@89:     return coordinates;
paulo@89:   };
paulo@89:   var d3_geom_polygonPrototype = d3.geom.polygon.prototype = [];
paulo@89:   d3_geom_polygonPrototype.area = function() {
paulo@89:     var i = -1, n = this.length, a, b = this[n - 1], area = 0;
paulo@89:     while (++i < n) {
paulo@89:       a = b;
paulo@89:       b = this[i];
paulo@89:       area += a[1] * b[0] - a[0] * b[1];
paulo@89:     }
paulo@89:     return area * .5;
paulo@89:   };
paulo@89:   d3_geom_polygonPrototype.centroid = function(k) {
paulo@89:     var i = -1, n = this.length, x = 0, y = 0, a, b = this[n - 1], c;
paulo@89:     if (!arguments.length) k = -1 / (6 * this.area());
paulo@89:     while (++i < n) {
paulo@89:       a = b;
paulo@89:       b = this[i];
paulo@89:       c = a[0] * b[1] - b[0] * a[1];
paulo@89:       x += (a[0] + b[0]) * c;
paulo@89:       y += (a[1] + b[1]) * c;
paulo@89:     }
paulo@89:     return [ x * k, y * k ];
paulo@89:   };
paulo@89:   d3_geom_polygonPrototype.clip = function(subject) {
paulo@89:     var input, closed = d3_geom_polygonClosed(subject), i = -1, n = this.length - d3_geom_polygonClosed(this), j, m, a = this[n - 1], b, c, d;
paulo@89:     while (++i < n) {
paulo@89:       input = subject.slice();
paulo@89:       subject.length = 0;
paulo@89:       b = this[i];
paulo@89:       c = input[(m = input.length - closed) - 1];
paulo@89:       j = -1;
paulo@89:       while (++j < m) {
paulo@89:         d = input[j];
paulo@89:         if (d3_geom_polygonInside(d, a, b)) {
paulo@89:           if (!d3_geom_polygonInside(c, a, b)) {
paulo@89:             subject.push(d3_geom_polygonIntersect(c, d, a, b));
paulo@89:           }
paulo@89:           subject.push(d);
paulo@89:         } else if (d3_geom_polygonInside(c, a, b)) {
paulo@89:           subject.push(d3_geom_polygonIntersect(c, d, a, b));
paulo@89:         }
paulo@89:         c = d;
paulo@89:       }
paulo@89:       if (closed) subject.push(subject[0]);
paulo@89:       a = b;
paulo@89:     }
paulo@89:     return subject;
paulo@89:   };
paulo@89:   function d3_geom_polygonInside(p, a, b) {
paulo@89:     return (b[0] - a[0]) * (p[1] - a[1]) < (b[1] - a[1]) * (p[0] - a[0]);
paulo@89:   }
paulo@89:   function d3_geom_polygonIntersect(c, d, a, b) {
paulo@89:     var x1 = c[0], x3 = a[0], x21 = d[0] - x1, x43 = b[0] - x3, y1 = c[1], y3 = a[1], y21 = d[1] - y1, y43 = b[1] - y3, ua = (x43 * (y1 - y3) - y43 * (x1 - x3)) / (y43 * x21 - x43 * y21);
paulo@89:     return [ x1 + ua * x21, y1 + ua * y21 ];
paulo@89:   }
paulo@89:   function d3_geom_polygonClosed(coordinates) {
paulo@89:     var a = coordinates[0], b = coordinates[coordinates.length - 1];
paulo@89:     return !(a[0] - b[0] || a[1] - b[1]);
paulo@89:   }
paulo@89:   var d3_geom_voronoiEdges, d3_geom_voronoiCells, d3_geom_voronoiBeaches, d3_geom_voronoiBeachPool = [], d3_geom_voronoiFirstCircle, d3_geom_voronoiCircles, d3_geom_voronoiCirclePool = [];
paulo@89:   function d3_geom_voronoiBeach() {
paulo@89:     d3_geom_voronoiRedBlackNode(this);
paulo@89:     this.edge = this.site = this.circle = null;
paulo@89:   }
paulo@89:   function d3_geom_voronoiCreateBeach(site) {
paulo@89:     var beach = d3_geom_voronoiBeachPool.pop() || new d3_geom_voronoiBeach();
paulo@89:     beach.site = site;
paulo@89:     return beach;
paulo@89:   }
paulo@89:   function d3_geom_voronoiDetachBeach(beach) {
paulo@89:     d3_geom_voronoiDetachCircle(beach);
paulo@89:     d3_geom_voronoiBeaches.remove(beach);
paulo@89:     d3_geom_voronoiBeachPool.push(beach);
paulo@89:     d3_geom_voronoiRedBlackNode(beach);
paulo@89:   }
paulo@89:   function d3_geom_voronoiRemoveBeach(beach) {
paulo@89:     var circle = beach.circle, x = circle.x, y = circle.cy, vertex = {
paulo@89:       x: x,
paulo@89:       y: y
paulo@89:     }, previous = beach.P, next = beach.N, disappearing = [ beach ];
paulo@89:     d3_geom_voronoiDetachBeach(beach);
paulo@89:     var lArc = previous;
paulo@89:     while (lArc.circle && abs(x - lArc.circle.x) < ε && abs(y - lArc.circle.cy) < ε) {
paulo@89:       previous = lArc.P;
paulo@89:       disappearing.unshift(lArc);
paulo@89:       d3_geom_voronoiDetachBeach(lArc);
paulo@89:       lArc = previous;
paulo@89:     }
paulo@89:     disappearing.unshift(lArc);
paulo@89:     d3_geom_voronoiDetachCircle(lArc);
paulo@89:     var rArc = next;
paulo@89:     while (rArc.circle && abs(x - rArc.circle.x) < ε && abs(y - rArc.circle.cy) < ε) {
paulo@89:       next = rArc.N;
paulo@89:       disappearing.push(rArc);
paulo@89:       d3_geom_voronoiDetachBeach(rArc);
paulo@89:       rArc = next;
paulo@89:     }
paulo@89:     disappearing.push(rArc);
paulo@89:     d3_geom_voronoiDetachCircle(rArc);
paulo@89:     var nArcs = disappearing.length, iArc;
paulo@89:     for (iArc = 1; iArc < nArcs; ++iArc) {
paulo@89:       rArc = disappearing[iArc];
paulo@89:       lArc = disappearing[iArc - 1];
paulo@89:       d3_geom_voronoiSetEdgeEnd(rArc.edge, lArc.site, rArc.site, vertex);
paulo@89:     }
paulo@89:     lArc = disappearing[0];
paulo@89:     rArc = disappearing[nArcs - 1];
paulo@89:     rArc.edge = d3_geom_voronoiCreateEdge(lArc.site, rArc.site, null, vertex);
paulo@89:     d3_geom_voronoiAttachCircle(lArc);
paulo@89:     d3_geom_voronoiAttachCircle(rArc);
paulo@89:   }
paulo@89:   function d3_geom_voronoiAddBeach(site) {
paulo@89:     var x = site.x, directrix = site.y, lArc, rArc, dxl, dxr, node = d3_geom_voronoiBeaches._;
paulo@89:     while (node) {
paulo@89:       dxl = d3_geom_voronoiLeftBreakPoint(node, directrix) - x;
paulo@89:       if (dxl > ε) node = node.L; else {
paulo@89:         dxr = x - d3_geom_voronoiRightBreakPoint(node, directrix);
paulo@89:         if (dxr > ε) {
paulo@89:           if (!node.R) {
paulo@89:             lArc = node;
paulo@89:             break;
paulo@89:           }
paulo@89:           node = node.R;
paulo@89:         } else {
paulo@89:           if (dxl > -ε) {
paulo@89:             lArc = node.P;
paulo@89:             rArc = node;
paulo@89:           } else if (dxr > -ε) {
paulo@89:             lArc = node;
paulo@89:             rArc = node.N;
paulo@89:           } else {
paulo@89:             lArc = rArc = node;
paulo@89:           }
paulo@89:           break;
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     var newArc = d3_geom_voronoiCreateBeach(site);
paulo@89:     d3_geom_voronoiBeaches.insert(lArc, newArc);
paulo@89:     if (!lArc && !rArc) return;
paulo@89:     if (lArc === rArc) {
paulo@89:       d3_geom_voronoiDetachCircle(lArc);
paulo@89:       rArc = d3_geom_voronoiCreateBeach(lArc.site);
paulo@89:       d3_geom_voronoiBeaches.insert(newArc, rArc);
paulo@89:       newArc.edge = rArc.edge = d3_geom_voronoiCreateEdge(lArc.site, newArc.site);
paulo@89:       d3_geom_voronoiAttachCircle(lArc);
paulo@89:       d3_geom_voronoiAttachCircle(rArc);
paulo@89:       return;
paulo@89:     }
paulo@89:     if (!rArc) {
paulo@89:       newArc.edge = d3_geom_voronoiCreateEdge(lArc.site, newArc.site);
paulo@89:       return;
paulo@89:     }
paulo@89:     d3_geom_voronoiDetachCircle(lArc);
paulo@89:     d3_geom_voronoiDetachCircle(rArc);
paulo@89:     var lSite = lArc.site, ax = lSite.x, ay = lSite.y, bx = site.x - ax, by = site.y - ay, rSite = rArc.site, cx = rSite.x - ax, cy = rSite.y - ay, d = 2 * (bx * cy - by * cx), hb = bx * bx + by * by, hc = cx * cx + cy * cy, vertex = {
paulo@89:       x: (cy * hb - by * hc) / d + ax,
paulo@89:       y: (bx * hc - cx * hb) / d + ay
paulo@89:     };
paulo@89:     d3_geom_voronoiSetEdgeEnd(rArc.edge, lSite, rSite, vertex);
paulo@89:     newArc.edge = d3_geom_voronoiCreateEdge(lSite, site, null, vertex);
paulo@89:     rArc.edge = d3_geom_voronoiCreateEdge(site, rSite, null, vertex);
paulo@89:     d3_geom_voronoiAttachCircle(lArc);
paulo@89:     d3_geom_voronoiAttachCircle(rArc);
paulo@89:   }
paulo@89:   function d3_geom_voronoiLeftBreakPoint(arc, directrix) {
paulo@89:     var site = arc.site, rfocx = site.x, rfocy = site.y, pby2 = rfocy - directrix;
paulo@89:     if (!pby2) return rfocx;
paulo@89:     var lArc = arc.P;
paulo@89:     if (!lArc) return -Infinity;
paulo@89:     site = lArc.site;
paulo@89:     var lfocx = site.x, lfocy = site.y, plby2 = lfocy - directrix;
paulo@89:     if (!plby2) return lfocx;
paulo@89:     var hl = lfocx - rfocx, aby2 = 1 / pby2 - 1 / plby2, b = hl / plby2;
paulo@89:     if (aby2) return (-b + Math.sqrt(b * b - 2 * aby2 * (hl * hl / (-2 * plby2) - lfocy + plby2 / 2 + rfocy - pby2 / 2))) / aby2 + rfocx;
paulo@89:     return (rfocx + lfocx) / 2;
paulo@89:   }
paulo@89:   function d3_geom_voronoiRightBreakPoint(arc, directrix) {
paulo@89:     var rArc = arc.N;
paulo@89:     if (rArc) return d3_geom_voronoiLeftBreakPoint(rArc, directrix);
paulo@89:     var site = arc.site;
paulo@89:     return site.y === directrix ? site.x : Infinity;
paulo@89:   }
paulo@89:   function d3_geom_voronoiCell(site) {
paulo@89:     this.site = site;
paulo@89:     this.edges = [];
paulo@89:   }
paulo@89:   d3_geom_voronoiCell.prototype.prepare = function() {
paulo@89:     var halfEdges = this.edges, iHalfEdge = halfEdges.length, edge;
paulo@89:     while (iHalfEdge--) {
paulo@89:       edge = halfEdges[iHalfEdge].edge;
paulo@89:       if (!edge.b || !edge.a) halfEdges.splice(iHalfEdge, 1);
paulo@89:     }
paulo@89:     halfEdges.sort(d3_geom_voronoiHalfEdgeOrder);
paulo@89:     return halfEdges.length;
paulo@89:   };
paulo@89:   function d3_geom_voronoiCloseCells(extent) {
paulo@89:     var x0 = extent[0][0], x1 = extent[1][0], y0 = extent[0][1], y1 = extent[1][1], x2, y2, x3, y3, cells = d3_geom_voronoiCells, iCell = cells.length, cell, iHalfEdge, halfEdges, nHalfEdges, start, end;
paulo@89:     while (iCell--) {
paulo@89:       cell = cells[iCell];
paulo@89:       if (!cell || !cell.prepare()) continue;
paulo@89:       halfEdges = cell.edges;
paulo@89:       nHalfEdges = halfEdges.length;
paulo@89:       iHalfEdge = 0;
paulo@89:       while (iHalfEdge < nHalfEdges) {
paulo@89:         end = halfEdges[iHalfEdge].end(), x3 = end.x, y3 = end.y;
paulo@89:         start = halfEdges[++iHalfEdge % nHalfEdges].start(), x2 = start.x, y2 = start.y;
paulo@89:         if (abs(x3 - x2) > ε || abs(y3 - y2) > ε) {
paulo@89:           halfEdges.splice(iHalfEdge, 0, new d3_geom_voronoiHalfEdge(d3_geom_voronoiCreateBorderEdge(cell.site, end, abs(x3 - x0) < ε && y1 - y3 > ε ? {
paulo@89:             x: x0,
paulo@89:             y: abs(x2 - x0) < ε ? y2 : y1
paulo@89:           } : abs(y3 - y1) < ε && x1 - x3 > ε ? {
paulo@89:             x: abs(y2 - y1) < ε ? x2 : x1,
paulo@89:             y: y1
paulo@89:           } : abs(x3 - x1) < ε && y3 - y0 > ε ? {
paulo@89:             x: x1,
paulo@89:             y: abs(x2 - x1) < ε ? y2 : y0
paulo@89:           } : abs(y3 - y0) < ε && x3 - x0 > ε ? {
paulo@89:             x: abs(y2 - y0) < ε ? x2 : x0,
paulo@89:             y: y0
paulo@89:           } : null), cell.site, null));
paulo@89:           ++nHalfEdges;
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_geom_voronoiHalfEdgeOrder(a, b) {
paulo@89:     return b.angle - a.angle;
paulo@89:   }
paulo@89:   function d3_geom_voronoiCircle() {
paulo@89:     d3_geom_voronoiRedBlackNode(this);
paulo@89:     this.x = this.y = this.arc = this.site = this.cy = null;
paulo@89:   }
paulo@89:   function d3_geom_voronoiAttachCircle(arc) {
paulo@89:     var lArc = arc.P, rArc = arc.N;
paulo@89:     if (!lArc || !rArc) return;
paulo@89:     var lSite = lArc.site, cSite = arc.site, rSite = rArc.site;
paulo@89:     if (lSite === rSite) return;
paulo@89:     var bx = cSite.x, by = cSite.y, ax = lSite.x - bx, ay = lSite.y - by, cx = rSite.x - bx, cy = rSite.y - by;
paulo@89:     var d = 2 * (ax * cy - ay * cx);
paulo@89:     if (d >= -ε2) return;
paulo@89:     var ha = ax * ax + ay * ay, hc = cx * cx + cy * cy, x = (cy * ha - ay * hc) / d, y = (ax * hc - cx * ha) / d, cy = y + by;
paulo@89:     var circle = d3_geom_voronoiCirclePool.pop() || new d3_geom_voronoiCircle();
paulo@89:     circle.arc = arc;
paulo@89:     circle.site = cSite;
paulo@89:     circle.x = x + bx;
paulo@89:     circle.y = cy + Math.sqrt(x * x + y * y);
paulo@89:     circle.cy = cy;
paulo@89:     arc.circle = circle;
paulo@89:     var before = null, node = d3_geom_voronoiCircles._;
paulo@89:     while (node) {
paulo@89:       if (circle.y < node.y || circle.y === node.y && circle.x <= node.x) {
paulo@89:         if (node.L) node = node.L; else {
paulo@89:           before = node.P;
paulo@89:           break;
paulo@89:         }
paulo@89:       } else {
paulo@89:         if (node.R) node = node.R; else {
paulo@89:           before = node;
paulo@89:           break;
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     d3_geom_voronoiCircles.insert(before, circle);
paulo@89:     if (!before) d3_geom_voronoiFirstCircle = circle;
paulo@89:   }
paulo@89:   function d3_geom_voronoiDetachCircle(arc) {
paulo@89:     var circle = arc.circle;
paulo@89:     if (circle) {
paulo@89:       if (!circle.P) d3_geom_voronoiFirstCircle = circle.N;
paulo@89:       d3_geom_voronoiCircles.remove(circle);
paulo@89:       d3_geom_voronoiCirclePool.push(circle);
paulo@89:       d3_geom_voronoiRedBlackNode(circle);
paulo@89:       arc.circle = null;
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_geom_voronoiClipEdges(extent) {
paulo@89:     var edges = d3_geom_voronoiEdges, clip = d3_geom_clipLine(extent[0][0], extent[0][1], extent[1][0], extent[1][1]), i = edges.length, e;
paulo@89:     while (i--) {
paulo@89:       e = edges[i];
paulo@89:       if (!d3_geom_voronoiConnectEdge(e, extent) || !clip(e) || abs(e.a.x - e.b.x) < ε && abs(e.a.y - e.b.y) < ε) {
paulo@89:         e.a = e.b = null;
paulo@89:         edges.splice(i, 1);
paulo@89:       }
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_geom_voronoiConnectEdge(edge, extent) {
paulo@89:     var vb = edge.b;
paulo@89:     if (vb) return true;
paulo@89:     var va = edge.a, x0 = extent[0][0], x1 = extent[1][0], y0 = extent[0][1], y1 = extent[1][1], lSite = edge.l, rSite = edge.r, lx = lSite.x, ly = lSite.y, rx = rSite.x, ry = rSite.y, fx = (lx + rx) / 2, fy = (ly + ry) / 2, fm, fb;
paulo@89:     if (ry === ly) {
paulo@89:       if (fx < x0 || fx >= x1) return;
paulo@89:       if (lx > rx) {
paulo@89:         if (!va) va = {
paulo@89:           x: fx,
paulo@89:           y: y0
paulo@89:         }; else if (va.y >= y1) return;
paulo@89:         vb = {
paulo@89:           x: fx,
paulo@89:           y: y1
paulo@89:         };
paulo@89:       } else {
paulo@89:         if (!va) va = {
paulo@89:           x: fx,
paulo@89:           y: y1
paulo@89:         }; else if (va.y < y0) return;
paulo@89:         vb = {
paulo@89:           x: fx,
paulo@89:           y: y0
paulo@89:         };
paulo@89:       }
paulo@89:     } else {
paulo@89:       fm = (lx - rx) / (ry - ly);
paulo@89:       fb = fy - fm * fx;
paulo@89:       if (fm < -1 || fm > 1) {
paulo@89:         if (lx > rx) {
paulo@89:           if (!va) va = {
paulo@89:             x: (y0 - fb) / fm,
paulo@89:             y: y0
paulo@89:           }; else if (va.y >= y1) return;
paulo@89:           vb = {
paulo@89:             x: (y1 - fb) / fm,
paulo@89:             y: y1
paulo@89:           };
paulo@89:         } else {
paulo@89:           if (!va) va = {
paulo@89:             x: (y1 - fb) / fm,
paulo@89:             y: y1
paulo@89:           }; else if (va.y < y0) return;
paulo@89:           vb = {
paulo@89:             x: (y0 - fb) / fm,
paulo@89:             y: y0
paulo@89:           };
paulo@89:         }
paulo@89:       } else {
paulo@89:         if (ly < ry) {
paulo@89:           if (!va) va = {
paulo@89:             x: x0,
paulo@89:             y: fm * x0 + fb
paulo@89:           }; else if (va.x >= x1) return;
paulo@89:           vb = {
paulo@89:             x: x1,
paulo@89:             y: fm * x1 + fb
paulo@89:           };
paulo@89:         } else {
paulo@89:           if (!va) va = {
paulo@89:             x: x1,
paulo@89:             y: fm * x1 + fb
paulo@89:           }; else if (va.x < x0) return;
paulo@89:           vb = {
paulo@89:             x: x0,
paulo@89:             y: fm * x0 + fb
paulo@89:           };
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     edge.a = va;
paulo@89:     edge.b = vb;
paulo@89:     return true;
paulo@89:   }
paulo@89:   function d3_geom_voronoiEdge(lSite, rSite) {
paulo@89:     this.l = lSite;
paulo@89:     this.r = rSite;
paulo@89:     this.a = this.b = null;
paulo@89:   }
paulo@89:   function d3_geom_voronoiCreateEdge(lSite, rSite, va, vb) {
paulo@89:     var edge = new d3_geom_voronoiEdge(lSite, rSite);
paulo@89:     d3_geom_voronoiEdges.push(edge);
paulo@89:     if (va) d3_geom_voronoiSetEdgeEnd(edge, lSite, rSite, va);
paulo@89:     if (vb) d3_geom_voronoiSetEdgeEnd(edge, rSite, lSite, vb);
paulo@89:     d3_geom_voronoiCells[lSite.i].edges.push(new d3_geom_voronoiHalfEdge(edge, lSite, rSite));
paulo@89:     d3_geom_voronoiCells[rSite.i].edges.push(new d3_geom_voronoiHalfEdge(edge, rSite, lSite));
paulo@89:     return edge;
paulo@89:   }
paulo@89:   function d3_geom_voronoiCreateBorderEdge(lSite, va, vb) {
paulo@89:     var edge = new d3_geom_voronoiEdge(lSite, null);
paulo@89:     edge.a = va;
paulo@89:     edge.b = vb;
paulo@89:     d3_geom_voronoiEdges.push(edge);
paulo@89:     return edge;
paulo@89:   }
paulo@89:   function d3_geom_voronoiSetEdgeEnd(edge, lSite, rSite, vertex) {
paulo@89:     if (!edge.a && !edge.b) {
paulo@89:       edge.a = vertex;
paulo@89:       edge.l = lSite;
paulo@89:       edge.r = rSite;
paulo@89:     } else if (edge.l === rSite) {
paulo@89:       edge.b = vertex;
paulo@89:     } else {
paulo@89:       edge.a = vertex;
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_geom_voronoiHalfEdge(edge, lSite, rSite) {
paulo@89:     var va = edge.a, vb = edge.b;
paulo@89:     this.edge = edge;
paulo@89:     this.site = lSite;
paulo@89:     this.angle = rSite ? Math.atan2(rSite.y - lSite.y, rSite.x - lSite.x) : edge.l === lSite ? Math.atan2(vb.x - va.x, va.y - vb.y) : Math.atan2(va.x - vb.x, vb.y - va.y);
paulo@89:   }
paulo@89:   d3_geom_voronoiHalfEdge.prototype = {
paulo@89:     start: function() {
paulo@89:       return this.edge.l === this.site ? this.edge.a : this.edge.b;
paulo@89:     },
paulo@89:     end: function() {
paulo@89:       return this.edge.l === this.site ? this.edge.b : this.edge.a;
paulo@89:     }
paulo@89:   };
paulo@89:   function d3_geom_voronoiRedBlackTree() {
paulo@89:     this._ = null;
paulo@89:   }
paulo@89:   function d3_geom_voronoiRedBlackNode(node) {
paulo@89:     node.U = node.C = node.L = node.R = node.P = node.N = null;
paulo@89:   }
paulo@89:   d3_geom_voronoiRedBlackTree.prototype = {
paulo@89:     insert: function(after, node) {
paulo@89:       var parent, grandpa, uncle;
paulo@89:       if (after) {
paulo@89:         node.P = after;
paulo@89:         node.N = after.N;
paulo@89:         if (after.N) after.N.P = node;
paulo@89:         after.N = node;
paulo@89:         if (after.R) {
paulo@89:           after = after.R;
paulo@89:           while (after.L) after = after.L;
paulo@89:           after.L = node;
paulo@89:         } else {
paulo@89:           after.R = node;
paulo@89:         }
paulo@89:         parent = after;
paulo@89:       } else if (this._) {
paulo@89:         after = d3_geom_voronoiRedBlackFirst(this._);
paulo@89:         node.P = null;
paulo@89:         node.N = after;
paulo@89:         after.P = after.L = node;
paulo@89:         parent = after;
paulo@89:       } else {
paulo@89:         node.P = node.N = null;
paulo@89:         this._ = node;
paulo@89:         parent = null;
paulo@89:       }
paulo@89:       node.L = node.R = null;
paulo@89:       node.U = parent;
paulo@89:       node.C = true;
paulo@89:       after = node;
paulo@89:       while (parent && parent.C) {
paulo@89:         grandpa = parent.U;
paulo@89:         if (parent === grandpa.L) {
paulo@89:           uncle = grandpa.R;
paulo@89:           if (uncle && uncle.C) {
paulo@89:             parent.C = uncle.C = false;
paulo@89:             grandpa.C = true;
paulo@89:             after = grandpa;
paulo@89:           } else {
paulo@89:             if (after === parent.R) {
paulo@89:               d3_geom_voronoiRedBlackRotateLeft(this, parent);
paulo@89:               after = parent;
paulo@89:               parent = after.U;
paulo@89:             }
paulo@89:             parent.C = false;
paulo@89:             grandpa.C = true;
paulo@89:             d3_geom_voronoiRedBlackRotateRight(this, grandpa);
paulo@89:           }
paulo@89:         } else {
paulo@89:           uncle = grandpa.L;
paulo@89:           if (uncle && uncle.C) {
paulo@89:             parent.C = uncle.C = false;
paulo@89:             grandpa.C = true;
paulo@89:             after = grandpa;
paulo@89:           } else {
paulo@89:             if (after === parent.L) {
paulo@89:               d3_geom_voronoiRedBlackRotateRight(this, parent);
paulo@89:               after = parent;
paulo@89:               parent = after.U;
paulo@89:             }
paulo@89:             parent.C = false;
paulo@89:             grandpa.C = true;
paulo@89:             d3_geom_voronoiRedBlackRotateLeft(this, grandpa);
paulo@89:           }
paulo@89:         }
paulo@89:         parent = after.U;
paulo@89:       }
paulo@89:       this._.C = false;
paulo@89:     },
paulo@89:     remove: function(node) {
paulo@89:       if (node.N) node.N.P = node.P;
paulo@89:       if (node.P) node.P.N = node.N;
paulo@89:       node.N = node.P = null;
paulo@89:       var parent = node.U, sibling, left = node.L, right = node.R, next, red;
paulo@89:       if (!left) next = right; else if (!right) next = left; else next = d3_geom_voronoiRedBlackFirst(right);
paulo@89:       if (parent) {
paulo@89:         if (parent.L === node) parent.L = next; else parent.R = next;
paulo@89:       } else {
paulo@89:         this._ = next;
paulo@89:       }
paulo@89:       if (left && right) {
paulo@89:         red = next.C;
paulo@89:         next.C = node.C;
paulo@89:         next.L = left;
paulo@89:         left.U = next;
paulo@89:         if (next !== right) {
paulo@89:           parent = next.U;
paulo@89:           next.U = node.U;
paulo@89:           node = next.R;
paulo@89:           parent.L = node;
paulo@89:           next.R = right;
paulo@89:           right.U = next;
paulo@89:         } else {
paulo@89:           next.U = parent;
paulo@89:           parent = next;
paulo@89:           node = next.R;
paulo@89:         }
paulo@89:       } else {
paulo@89:         red = node.C;
paulo@89:         node = next;
paulo@89:       }
paulo@89:       if (node) node.U = parent;
paulo@89:       if (red) return;
paulo@89:       if (node && node.C) {
paulo@89:         node.C = false;
paulo@89:         return;
paulo@89:       }
paulo@89:       do {
paulo@89:         if (node === this._) break;
paulo@89:         if (node === parent.L) {
paulo@89:           sibling = parent.R;
paulo@89:           if (sibling.C) {
paulo@89:             sibling.C = false;
paulo@89:             parent.C = true;
paulo@89:             d3_geom_voronoiRedBlackRotateLeft(this, parent);
paulo@89:             sibling = parent.R;
paulo@89:           }
paulo@89:           if (sibling.L && sibling.L.C || sibling.R && sibling.R.C) {
paulo@89:             if (!sibling.R || !sibling.R.C) {
paulo@89:               sibling.L.C = false;
paulo@89:               sibling.C = true;
paulo@89:               d3_geom_voronoiRedBlackRotateRight(this, sibling);
paulo@89:               sibling = parent.R;
paulo@89:             }
paulo@89:             sibling.C = parent.C;
paulo@89:             parent.C = sibling.R.C = false;
paulo@89:             d3_geom_voronoiRedBlackRotateLeft(this, parent);
paulo@89:             node = this._;
paulo@89:             break;
paulo@89:           }
paulo@89:         } else {
paulo@89:           sibling = parent.L;
paulo@89:           if (sibling.C) {
paulo@89:             sibling.C = false;
paulo@89:             parent.C = true;
paulo@89:             d3_geom_voronoiRedBlackRotateRight(this, parent);
paulo@89:             sibling = parent.L;
paulo@89:           }
paulo@89:           if (sibling.L && sibling.L.C || sibling.R && sibling.R.C) {
paulo@89:             if (!sibling.L || !sibling.L.C) {
paulo@89:               sibling.R.C = false;
paulo@89:               sibling.C = true;
paulo@89:               d3_geom_voronoiRedBlackRotateLeft(this, sibling);
paulo@89:               sibling = parent.L;
paulo@89:             }
paulo@89:             sibling.C = parent.C;
paulo@89:             parent.C = sibling.L.C = false;
paulo@89:             d3_geom_voronoiRedBlackRotateRight(this, parent);
paulo@89:             node = this._;
paulo@89:             break;
paulo@89:           }
paulo@89:         }
paulo@89:         sibling.C = true;
paulo@89:         node = parent;
paulo@89:         parent = parent.U;
paulo@89:       } while (!node.C);
paulo@89:       if (node) node.C = false;
paulo@89:     }
paulo@89:   };
paulo@89:   function d3_geom_voronoiRedBlackRotateLeft(tree, node) {
paulo@89:     var p = node, q = node.R, parent = p.U;
paulo@89:     if (parent) {
paulo@89:       if (parent.L === p) parent.L = q; else parent.R = q;
paulo@89:     } else {
paulo@89:       tree._ = q;
paulo@89:     }
paulo@89:     q.U = parent;
paulo@89:     p.U = q;
paulo@89:     p.R = q.L;
paulo@89:     if (p.R) p.R.U = p;
paulo@89:     q.L = p;
paulo@89:   }
paulo@89:   function d3_geom_voronoiRedBlackRotateRight(tree, node) {
paulo@89:     var p = node, q = node.L, parent = p.U;
paulo@89:     if (parent) {
paulo@89:       if (parent.L === p) parent.L = q; else parent.R = q;
paulo@89:     } else {
paulo@89:       tree._ = q;
paulo@89:     }
paulo@89:     q.U = parent;
paulo@89:     p.U = q;
paulo@89:     p.L = q.R;
paulo@89:     if (p.L) p.L.U = p;
paulo@89:     q.R = p;
paulo@89:   }
paulo@89:   function d3_geom_voronoiRedBlackFirst(node) {
paulo@89:     while (node.L) node = node.L;
paulo@89:     return node;
paulo@89:   }
paulo@89:   function d3_geom_voronoi(sites, bbox) {
paulo@89:     var site = sites.sort(d3_geom_voronoiVertexOrder).pop(), x0, y0, circle;
paulo@89:     d3_geom_voronoiEdges = [];
paulo@89:     d3_geom_voronoiCells = new Array(sites.length);
paulo@89:     d3_geom_voronoiBeaches = new d3_geom_voronoiRedBlackTree();
paulo@89:     d3_geom_voronoiCircles = new d3_geom_voronoiRedBlackTree();
paulo@89:     while (true) {
paulo@89:       circle = d3_geom_voronoiFirstCircle;
paulo@89:       if (site && (!circle || site.y < circle.y || site.y === circle.y && site.x < circle.x)) {
paulo@89:         if (site.x !== x0 || site.y !== y0) {
paulo@89:           d3_geom_voronoiCells[site.i] = new d3_geom_voronoiCell(site);
paulo@89:           d3_geom_voronoiAddBeach(site);
paulo@89:           x0 = site.x, y0 = site.y;
paulo@89:         }
paulo@89:         site = sites.pop();
paulo@89:       } else if (circle) {
paulo@89:         d3_geom_voronoiRemoveBeach(circle.arc);
paulo@89:       } else {
paulo@89:         break;
paulo@89:       }
paulo@89:     }
paulo@89:     if (bbox) d3_geom_voronoiClipEdges(bbox), d3_geom_voronoiCloseCells(bbox);
paulo@89:     var diagram = {
paulo@89:       cells: d3_geom_voronoiCells,
paulo@89:       edges: d3_geom_voronoiEdges
paulo@89:     };
paulo@89:     d3_geom_voronoiBeaches = d3_geom_voronoiCircles = d3_geom_voronoiEdges = d3_geom_voronoiCells = null;
paulo@89:     return diagram;
paulo@89:   }
paulo@89:   function d3_geom_voronoiVertexOrder(a, b) {
paulo@89:     return b.y - a.y || b.x - a.x;
paulo@89:   }
paulo@89:   d3.geom.voronoi = function(points) {
paulo@89:     var x = d3_geom_pointX, y = d3_geom_pointY, fx = x, fy = y, clipExtent = d3_geom_voronoiClipExtent;
paulo@89:     if (points) return voronoi(points);
paulo@89:     function voronoi(data) {
paulo@89:       var polygons = new Array(data.length), x0 = clipExtent[0][0], y0 = clipExtent[0][1], x1 = clipExtent[1][0], y1 = clipExtent[1][1];
paulo@89:       d3_geom_voronoi(sites(data), clipExtent).cells.forEach(function(cell, i) {
paulo@89:         var edges = cell.edges, site = cell.site, polygon = polygons[i] = edges.length ? edges.map(function(e) {
paulo@89:           var s = e.start();
paulo@89:           return [ s.x, s.y ];
paulo@89:         }) : site.x >= x0 && site.x <= x1 && site.y >= y0 && site.y <= y1 ? [ [ x0, y1 ], [ x1, y1 ], [ x1, y0 ], [ x0, y0 ] ] : [];
paulo@89:         polygon.point = data[i];
paulo@89:       });
paulo@89:       return polygons;
paulo@89:     }
paulo@89:     function sites(data) {
paulo@89:       return data.map(function(d, i) {
paulo@89:         return {
paulo@89:           x: Math.round(fx(d, i) / ε) * ε,
paulo@89:           y: Math.round(fy(d, i) / ε) * ε,
paulo@89:           i: i
paulo@89:         };
paulo@89:       });
paulo@89:     }
paulo@89:     voronoi.links = function(data) {
paulo@89:       return d3_geom_voronoi(sites(data)).edges.filter(function(edge) {
paulo@89:         return edge.l && edge.r;
paulo@89:       }).map(function(edge) {
paulo@89:         return {
paulo@89:           source: data[edge.l.i],
paulo@89:           target: data[edge.r.i]
paulo@89:         };
paulo@89:       });
paulo@89:     };
paulo@89:     voronoi.triangles = function(data) {
paulo@89:       var triangles = [];
paulo@89:       d3_geom_voronoi(sites(data)).cells.forEach(function(cell, i) {
paulo@89:         var site = cell.site, edges = cell.edges.sort(d3_geom_voronoiHalfEdgeOrder), j = -1, m = edges.length, e0, s0, e1 = edges[m - 1].edge, s1 = e1.l === site ? e1.r : e1.l;
paulo@89:         while (++j < m) {
paulo@89:           e0 = e1;
paulo@89:           s0 = s1;
paulo@89:           e1 = edges[j].edge;
paulo@89:           s1 = e1.l === site ? e1.r : e1.l;
paulo@89:           if (i < s0.i && i < s1.i && d3_geom_voronoiTriangleArea(site, s0, s1) < 0) {
paulo@89:             triangles.push([ data[i], data[s0.i], data[s1.i] ]);
paulo@89:           }
paulo@89:         }
paulo@89:       });
paulo@89:       return triangles;
paulo@89:     };
paulo@89:     voronoi.x = function(_) {
paulo@89:       return arguments.length ? (fx = d3_functor(x = _), voronoi) : x;
paulo@89:     };
paulo@89:     voronoi.y = function(_) {
paulo@89:       return arguments.length ? (fy = d3_functor(y = _), voronoi) : y;
paulo@89:     };
paulo@89:     voronoi.clipExtent = function(_) {
paulo@89:       if (!arguments.length) return clipExtent === d3_geom_voronoiClipExtent ? null : clipExtent;
paulo@89:       clipExtent = _ == null ? d3_geom_voronoiClipExtent : _;
paulo@89:       return voronoi;
paulo@89:     };
paulo@89:     voronoi.size = function(_) {
paulo@89:       if (!arguments.length) return clipExtent === d3_geom_voronoiClipExtent ? null : clipExtent && clipExtent[1];
paulo@89:       return voronoi.clipExtent(_ && [ [ 0, 0 ], _ ]);
paulo@89:     };
paulo@89:     return voronoi;
paulo@89:   };
paulo@89:   var d3_geom_voronoiClipExtent = [ [ -1e6, -1e6 ], [ 1e6, 1e6 ] ];
paulo@89:   function d3_geom_voronoiTriangleArea(a, b, c) {
paulo@89:     return (a.x - c.x) * (b.y - a.y) - (a.x - b.x) * (c.y - a.y);
paulo@89:   }
paulo@89:   d3.geom.delaunay = function(vertices) {
paulo@89:     return d3.geom.voronoi().triangles(vertices);
paulo@89:   };
paulo@89:   d3.geom.quadtree = function(points, x1, y1, x2, y2) {
paulo@89:     var x = d3_geom_pointX, y = d3_geom_pointY, compat;
paulo@89:     if (compat = arguments.length) {
paulo@89:       x = d3_geom_quadtreeCompatX;
paulo@89:       y = d3_geom_quadtreeCompatY;
paulo@89:       if (compat === 3) {
paulo@89:         y2 = y1;
paulo@89:         x2 = x1;
paulo@89:         y1 = x1 = 0;
paulo@89:       }
paulo@89:       return quadtree(points);
paulo@89:     }
paulo@89:     function quadtree(data) {
paulo@89:       var d, fx = d3_functor(x), fy = d3_functor(y), xs, ys, i, n, x1_, y1_, x2_, y2_;
paulo@89:       if (x1 != null) {
paulo@89:         x1_ = x1, y1_ = y1, x2_ = x2, y2_ = y2;
paulo@89:       } else {
paulo@89:         x2_ = y2_ = -(x1_ = y1_ = Infinity);
paulo@89:         xs = [], ys = [];
paulo@89:         n = data.length;
paulo@89:         if (compat) for (i = 0; i < n; ++i) {
paulo@89:           d = data[i];
paulo@89:           if (d.x < x1_) x1_ = d.x;
paulo@89:           if (d.y < y1_) y1_ = d.y;
paulo@89:           if (d.x > x2_) x2_ = d.x;
paulo@89:           if (d.y > y2_) y2_ = d.y;
paulo@89:           xs.push(d.x);
paulo@89:           ys.push(d.y);
paulo@89:         } else for (i = 0; i < n; ++i) {
paulo@89:           var x_ = +fx(d = data[i], i), y_ = +fy(d, i);
paulo@89:           if (x_ < x1_) x1_ = x_;
paulo@89:           if (y_ < y1_) y1_ = y_;
paulo@89:           if (x_ > x2_) x2_ = x_;
paulo@89:           if (y_ > y2_) y2_ = y_;
paulo@89:           xs.push(x_);
paulo@89:           ys.push(y_);
paulo@89:         }
paulo@89:       }
paulo@89:       var dx = x2_ - x1_, dy = y2_ - y1_;
paulo@89:       if (dx > dy) y2_ = y1_ + dx; else x2_ = x1_ + dy;
paulo@89:       function insert(n, d, x, y, x1, y1, x2, y2) {
paulo@89:         if (isNaN(x) || isNaN(y)) return;
paulo@89:         if (n.leaf) {
paulo@89:           var nx = n.x, ny = n.y;
paulo@89:           if (nx != null) {
paulo@89:             if (abs(nx - x) + abs(ny - y) < .01) {
paulo@89:               insertChild(n, d, x, y, x1, y1, x2, y2);
paulo@89:             } else {
paulo@89:               var nPoint = n.point;
paulo@89:               n.x = n.y = n.point = null;
paulo@89:               insertChild(n, nPoint, nx, ny, x1, y1, x2, y2);
paulo@89:               insertChild(n, d, x, y, x1, y1, x2, y2);
paulo@89:             }
paulo@89:           } else {
paulo@89:             n.x = x, n.y = y, n.point = d;
paulo@89:           }
paulo@89:         } else {
paulo@89:           insertChild(n, d, x, y, x1, y1, x2, y2);
paulo@89:         }
paulo@89:       }
paulo@89:       function insertChild(n, d, x, y, x1, y1, x2, y2) {
paulo@89:         var xm = (x1 + x2) * .5, ym = (y1 + y2) * .5, right = x >= xm, below = y >= ym, i = below << 1 | right;
paulo@89:         n.leaf = false;
paulo@89:         n = n.nodes[i] || (n.nodes[i] = d3_geom_quadtreeNode());
paulo@89:         if (right) x1 = xm; else x2 = xm;
paulo@89:         if (below) y1 = ym; else y2 = ym;
paulo@89:         insert(n, d, x, y, x1, y1, x2, y2);
paulo@89:       }
paulo@89:       var root = d3_geom_quadtreeNode();
paulo@89:       root.add = function(d) {
paulo@89:         insert(root, d, +fx(d, ++i), +fy(d, i), x1_, y1_, x2_, y2_);
paulo@89:       };
paulo@89:       root.visit = function(f) {
paulo@89:         d3_geom_quadtreeVisit(f, root, x1_, y1_, x2_, y2_);
paulo@89:       };
paulo@89:       root.find = function(point) {
paulo@89:         return d3_geom_quadtreeFind(root, point[0], point[1], x1_, y1_, x2_, y2_);
paulo@89:       };
paulo@89:       i = -1;
paulo@89:       if (x1 == null) {
paulo@89:         while (++i < n) {
paulo@89:           insert(root, data[i], xs[i], ys[i], x1_, y1_, x2_, y2_);
paulo@89:         }
paulo@89:         --i;
paulo@89:       } else data.forEach(root.add);
paulo@89:       xs = ys = data = d = null;
paulo@89:       return root;
paulo@89:     }
paulo@89:     quadtree.x = function(_) {
paulo@89:       return arguments.length ? (x = _, quadtree) : x;
paulo@89:     };
paulo@89:     quadtree.y = function(_) {
paulo@89:       return arguments.length ? (y = _, quadtree) : y;
paulo@89:     };
paulo@89:     quadtree.extent = function(_) {
paulo@89:       if (!arguments.length) return x1 == null ? null : [ [ x1, y1 ], [ x2, y2 ] ];
paulo@89:       if (_ == null) x1 = y1 = x2 = y2 = null; else x1 = +_[0][0], y1 = +_[0][1], x2 = +_[1][0], 
paulo@89:       y2 = +_[1][1];
paulo@89:       return quadtree;
paulo@89:     };
paulo@89:     quadtree.size = function(_) {
paulo@89:       if (!arguments.length) return x1 == null ? null : [ x2 - x1, y2 - y1 ];
paulo@89:       if (_ == null) x1 = y1 = x2 = y2 = null; else x1 = y1 = 0, x2 = +_[0], y2 = +_[1];
paulo@89:       return quadtree;
paulo@89:     };
paulo@89:     return quadtree;
paulo@89:   };
paulo@89:   function d3_geom_quadtreeCompatX(d) {
paulo@89:     return d.x;
paulo@89:   }
paulo@89:   function d3_geom_quadtreeCompatY(d) {
paulo@89:     return d.y;
paulo@89:   }
paulo@89:   function d3_geom_quadtreeNode() {
paulo@89:     return {
paulo@89:       leaf: true,
paulo@89:       nodes: [],
paulo@89:       point: null,
paulo@89:       x: null,
paulo@89:       y: null
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_geom_quadtreeVisit(f, node, x1, y1, x2, y2) {
paulo@89:     if (!f(node, x1, y1, x2, y2)) {
paulo@89:       var sx = (x1 + x2) * .5, sy = (y1 + y2) * .5, children = node.nodes;
paulo@89:       if (children[0]) d3_geom_quadtreeVisit(f, children[0], x1, y1, sx, sy);
paulo@89:       if (children[1]) d3_geom_quadtreeVisit(f, children[1], sx, y1, x2, sy);
paulo@89:       if (children[2]) d3_geom_quadtreeVisit(f, children[2], x1, sy, sx, y2);
paulo@89:       if (children[3]) d3_geom_quadtreeVisit(f, children[3], sx, sy, x2, y2);
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_geom_quadtreeFind(root, x, y, x0, y0, x3, y3) {
paulo@89:     var minDistance2 = Infinity, closestPoint;
paulo@89:     (function find(node, x1, y1, x2, y2) {
paulo@89:       if (x1 > x3 || y1 > y3 || x2 < x0 || y2 < y0) return;
paulo@89:       if (point = node.point) {
paulo@89:         var point, dx = x - node.x, dy = y - node.y, distance2 = dx * dx + dy * dy;
paulo@89:         if (distance2 < minDistance2) {
paulo@89:           var distance = Math.sqrt(minDistance2 = distance2);
paulo@89:           x0 = x - distance, y0 = y - distance;
paulo@89:           x3 = x + distance, y3 = y + distance;
paulo@89:           closestPoint = point;
paulo@89:         }
paulo@89:       }
paulo@89:       var children = node.nodes, xm = (x1 + x2) * .5, ym = (y1 + y2) * .5, right = x >= xm, below = y >= ym;
paulo@89:       for (var i = below << 1 | right, j = i + 4; i < j; ++i) {
paulo@89:         if (node = children[i & 3]) switch (i & 3) {
paulo@89:          case 0:
paulo@89:           find(node, x1, y1, xm, ym);
paulo@89:           break;
paulo@89: 
paulo@89:          case 1:
paulo@89:           find(node, xm, y1, x2, ym);
paulo@89:           break;
paulo@89: 
paulo@89:          case 2:
paulo@89:           find(node, x1, ym, xm, y2);
paulo@89:           break;
paulo@89: 
paulo@89:          case 3:
paulo@89:           find(node, xm, ym, x2, y2);
paulo@89:           break;
paulo@89:         }
paulo@89:       }
paulo@89:     })(root, x0, y0, x3, y3);
paulo@89:     return closestPoint;
paulo@89:   }
paulo@89:   d3.interpolateRgb = d3_interpolateRgb;
paulo@89:   function d3_interpolateRgb(a, b) {
paulo@89:     a = d3.rgb(a);
paulo@89:     b = d3.rgb(b);
paulo@89:     var ar = a.r, ag = a.g, ab = a.b, br = b.r - ar, bg = b.g - ag, bb = b.b - ab;
paulo@89:     return function(t) {
paulo@89:       return "#" + d3_rgb_hex(Math.round(ar + br * t)) + d3_rgb_hex(Math.round(ag + bg * t)) + d3_rgb_hex(Math.round(ab + bb * t));
paulo@89:     };
paulo@89:   }
paulo@89:   d3.interpolateObject = d3_interpolateObject;
paulo@89:   function d3_interpolateObject(a, b) {
paulo@89:     var i = {}, c = {}, k;
paulo@89:     for (k in a) {
paulo@89:       if (k in b) {
paulo@89:         i[k] = d3_interpolate(a[k], b[k]);
paulo@89:       } else {
paulo@89:         c[k] = a[k];
paulo@89:       }
paulo@89:     }
paulo@89:     for (k in b) {
paulo@89:       if (!(k in a)) {
paulo@89:         c[k] = b[k];
paulo@89:       }
paulo@89:     }
paulo@89:     return function(t) {
paulo@89:       for (k in i) c[k] = i[k](t);
paulo@89:       return c;
paulo@89:     };
paulo@89:   }
paulo@89:   d3.interpolateNumber = d3_interpolateNumber;
paulo@89:   function d3_interpolateNumber(a, b) {
paulo@89:     a = +a, b = +b;
paulo@89:     return function(t) {
paulo@89:       return a * (1 - t) + b * t;
paulo@89:     };
paulo@89:   }
paulo@89:   d3.interpolateString = d3_interpolateString;
paulo@89:   function d3_interpolateString(a, b) {
paulo@89:     var bi = d3_interpolate_numberA.lastIndex = d3_interpolate_numberB.lastIndex = 0, am, bm, bs, i = -1, s = [], q = [];
paulo@89:     a = a + "", b = b + "";
paulo@89:     while ((am = d3_interpolate_numberA.exec(a)) && (bm = d3_interpolate_numberB.exec(b))) {
paulo@89:       if ((bs = bm.index) > bi) {
paulo@89:         bs = b.slice(bi, bs);
paulo@89:         if (s[i]) s[i] += bs; else s[++i] = bs;
paulo@89:       }
paulo@89:       if ((am = am[0]) === (bm = bm[0])) {
paulo@89:         if (s[i]) s[i] += bm; else s[++i] = bm;
paulo@89:       } else {
paulo@89:         s[++i] = null;
paulo@89:         q.push({
paulo@89:           i: i,
paulo@89:           x: d3_interpolateNumber(am, bm)
paulo@89:         });
paulo@89:       }
paulo@89:       bi = d3_interpolate_numberB.lastIndex;
paulo@89:     }
paulo@89:     if (bi < b.length) {
paulo@89:       bs = b.slice(bi);
paulo@89:       if (s[i]) s[i] += bs; else s[++i] = bs;
paulo@89:     }
paulo@89:     return s.length < 2 ? q[0] ? (b = q[0].x, function(t) {
paulo@89:       return b(t) + "";
paulo@89:     }) : function() {
paulo@89:       return b;
paulo@89:     } : (b = q.length, function(t) {
paulo@89:       for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
paulo@89:       return s.join("");
paulo@89:     });
paulo@89:   }
paulo@89:   var d3_interpolate_numberA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g, d3_interpolate_numberB = new RegExp(d3_interpolate_numberA.source, "g");
paulo@89:   d3.interpolate = d3_interpolate;
paulo@89:   function d3_interpolate(a, b) {
paulo@89:     var i = d3.interpolators.length, f;
paulo@89:     while (--i >= 0 && !(f = d3.interpolators[i](a, b))) ;
paulo@89:     return f;
paulo@89:   }
paulo@89:   d3.interpolators = [ function(a, b) {
paulo@89:     var t = typeof b;
paulo@89:     return (t === "string" ? d3_rgb_names.has(b.toLowerCase()) || /^(#|rgb\(|hsl\()/i.test(b) ? d3_interpolateRgb : d3_interpolateString : b instanceof d3_color ? d3_interpolateRgb : Array.isArray(b) ? d3_interpolateArray : t === "object" && isNaN(b) ? d3_interpolateObject : d3_interpolateNumber)(a, b);
paulo@89:   } ];
paulo@89:   d3.interpolateArray = d3_interpolateArray;
paulo@89:   function d3_interpolateArray(a, b) {
paulo@89:     var x = [], c = [], na = a.length, nb = b.length, n0 = Math.min(a.length, b.length), i;
paulo@89:     for (i = 0; i < n0; ++i) x.push(d3_interpolate(a[i], b[i]));
paulo@89:     for (;i < na; ++i) c[i] = a[i];
paulo@89:     for (;i < nb; ++i) c[i] = b[i];
paulo@89:     return function(t) {
paulo@89:       for (i = 0; i < n0; ++i) c[i] = x[i](t);
paulo@89:       return c;
paulo@89:     };
paulo@89:   }
paulo@89:   var d3_ease_default = function() {
paulo@89:     return d3_identity;
paulo@89:   };
paulo@89:   var d3_ease = d3.map({
paulo@89:     linear: d3_ease_default,
paulo@89:     poly: d3_ease_poly,
paulo@89:     quad: function() {
paulo@89:       return d3_ease_quad;
paulo@89:     },
paulo@89:     cubic: function() {
paulo@89:       return d3_ease_cubic;
paulo@89:     },
paulo@89:     sin: function() {
paulo@89:       return d3_ease_sin;
paulo@89:     },
paulo@89:     exp: function() {
paulo@89:       return d3_ease_exp;
paulo@89:     },
paulo@89:     circle: function() {
paulo@89:       return d3_ease_circle;
paulo@89:     },
paulo@89:     elastic: d3_ease_elastic,
paulo@89:     back: d3_ease_back,
paulo@89:     bounce: function() {
paulo@89:       return d3_ease_bounce;
paulo@89:     }
paulo@89:   });
paulo@89:   var d3_ease_mode = d3.map({
paulo@89:     "in": d3_identity,
paulo@89:     out: d3_ease_reverse,
paulo@89:     "in-out": d3_ease_reflect,
paulo@89:     "out-in": function(f) {
paulo@89:       return d3_ease_reflect(d3_ease_reverse(f));
paulo@89:     }
paulo@89:   });
paulo@89:   d3.ease = function(name) {
paulo@89:     var i = name.indexOf("-"), t = i >= 0 ? name.slice(0, i) : name, m = i >= 0 ? name.slice(i + 1) : "in";
paulo@89:     t = d3_ease.get(t) || d3_ease_default;
paulo@89:     m = d3_ease_mode.get(m) || d3_identity;
paulo@89:     return d3_ease_clamp(m(t.apply(null, d3_arraySlice.call(arguments, 1))));
paulo@89:   };
paulo@89:   function d3_ease_clamp(f) {
paulo@89:     return function(t) {
paulo@89:       return t <= 0 ? 0 : t >= 1 ? 1 : f(t);
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_ease_reverse(f) {
paulo@89:     return function(t) {
paulo@89:       return 1 - f(1 - t);
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_ease_reflect(f) {
paulo@89:     return function(t) {
paulo@89:       return .5 * (t < .5 ? f(2 * t) : 2 - f(2 - 2 * t));
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_ease_quad(t) {
paulo@89:     return t * t;
paulo@89:   }
paulo@89:   function d3_ease_cubic(t) {
paulo@89:     return t * t * t;
paulo@89:   }
paulo@89:   function d3_ease_cubicInOut(t) {
paulo@89:     if (t <= 0) return 0;
paulo@89:     if (t >= 1) return 1;
paulo@89:     var t2 = t * t, t3 = t2 * t;
paulo@89:     return 4 * (t < .5 ? t3 : 3 * (t - t2) + t3 - .75);
paulo@89:   }
paulo@89:   function d3_ease_poly(e) {
paulo@89:     return function(t) {
paulo@89:       return Math.pow(t, e);
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_ease_sin(t) {
paulo@89:     return 1 - Math.cos(t * halfπ);
paulo@89:   }
paulo@89:   function d3_ease_exp(t) {
paulo@89:     return Math.pow(2, 10 * (t - 1));
paulo@89:   }
paulo@89:   function d3_ease_circle(t) {
paulo@89:     return 1 - Math.sqrt(1 - t * t);
paulo@89:   }
paulo@89:   function d3_ease_elastic(a, p) {
paulo@89:     var s;
paulo@89:     if (arguments.length < 2) p = .45;
paulo@89:     if (arguments.length) s = p / τ * Math.asin(1 / a); else a = 1, s = p / 4;
paulo@89:     return function(t) {
paulo@89:       return 1 + a * Math.pow(2, -10 * t) * Math.sin((t - s) * τ / p);
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_ease_back(s) {
paulo@89:     if (!s) s = 1.70158;
paulo@89:     return function(t) {
paulo@89:       return t * t * ((s + 1) * t - s);
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_ease_bounce(t) {
paulo@89:     return t < 1 / 2.75 ? 7.5625 * t * t : t < 2 / 2.75 ? 7.5625 * (t -= 1.5 / 2.75) * t + .75 : t < 2.5 / 2.75 ? 7.5625 * (t -= 2.25 / 2.75) * t + .9375 : 7.5625 * (t -= 2.625 / 2.75) * t + .984375;
paulo@89:   }
paulo@89:   d3.interpolateHcl = d3_interpolateHcl;
paulo@89:   function d3_interpolateHcl(a, b) {
paulo@89:     a = d3.hcl(a);
paulo@89:     b = d3.hcl(b);
paulo@89:     var ah = a.h, ac = a.c, al = a.l, bh = b.h - ah, bc = b.c - ac, bl = b.l - al;
paulo@89:     if (isNaN(bc)) bc = 0, ac = isNaN(ac) ? b.c : ac;
paulo@89:     if (isNaN(bh)) bh = 0, ah = isNaN(ah) ? b.h : ah; else if (bh > 180) bh -= 360; else if (bh < -180) bh += 360;
paulo@89:     return function(t) {
paulo@89:       return d3_hcl_lab(ah + bh * t, ac + bc * t, al + bl * t) + "";
paulo@89:     };
paulo@89:   }
paulo@89:   d3.interpolateHsl = d3_interpolateHsl;
paulo@89:   function d3_interpolateHsl(a, b) {
paulo@89:     a = d3.hsl(a);
paulo@89:     b = d3.hsl(b);
paulo@89:     var ah = a.h, as = a.s, al = a.l, bh = b.h - ah, bs = b.s - as, bl = b.l - al;
paulo@89:     if (isNaN(bs)) bs = 0, as = isNaN(as) ? b.s : as;
paulo@89:     if (isNaN(bh)) bh = 0, ah = isNaN(ah) ? b.h : ah; else if (bh > 180) bh -= 360; else if (bh < -180) bh += 360;
paulo@89:     return function(t) {
paulo@89:       return d3_hsl_rgb(ah + bh * t, as + bs * t, al + bl * t) + "";
paulo@89:     };
paulo@89:   }
paulo@89:   d3.interpolateLab = d3_interpolateLab;
paulo@89:   function d3_interpolateLab(a, b) {
paulo@89:     a = d3.lab(a);
paulo@89:     b = d3.lab(b);
paulo@89:     var al = a.l, aa = a.a, ab = a.b, bl = b.l - al, ba = b.a - aa, bb = b.b - ab;
paulo@89:     return function(t) {
paulo@89:       return d3_lab_rgb(al + bl * t, aa + ba * t, ab + bb * t) + "";
paulo@89:     };
paulo@89:   }
paulo@89:   d3.interpolateRound = d3_interpolateRound;
paulo@89:   function d3_interpolateRound(a, b) {
paulo@89:     b -= a;
paulo@89:     return function(t) {
paulo@89:       return Math.round(a + b * t);
paulo@89:     };
paulo@89:   }
paulo@89:   d3.transform = function(string) {
paulo@89:     var g = d3_document.createElementNS(d3.ns.prefix.svg, "g");
paulo@89:     return (d3.transform = function(string) {
paulo@89:       if (string != null) {
paulo@89:         g.setAttribute("transform", string);
paulo@89:         var t = g.transform.baseVal.consolidate();
paulo@89:       }
paulo@89:       return new d3_transform(t ? t.matrix : d3_transformIdentity);
paulo@89:     })(string);
paulo@89:   };
paulo@89:   function d3_transform(m) {
paulo@89:     var r0 = [ m.a, m.b ], r1 = [ m.c, m.d ], kx = d3_transformNormalize(r0), kz = d3_transformDot(r0, r1), ky = d3_transformNormalize(d3_transformCombine(r1, r0, -kz)) || 0;
paulo@89:     if (r0[0] * r1[1] < r1[0] * r0[1]) {
paulo@89:       r0[0] *= -1;
paulo@89:       r0[1] *= -1;
paulo@89:       kx *= -1;
paulo@89:       kz *= -1;
paulo@89:     }
paulo@89:     this.rotate = (kx ? Math.atan2(r0[1], r0[0]) : Math.atan2(-r1[0], r1[1])) * d3_degrees;
paulo@89:     this.translate = [ m.e, m.f ];
paulo@89:     this.scale = [ kx, ky ];
paulo@89:     this.skew = ky ? Math.atan2(kz, ky) * d3_degrees : 0;
paulo@89:   }
paulo@89:   d3_transform.prototype.toString = function() {
paulo@89:     return "translate(" + this.translate + ")rotate(" + this.rotate + ")skewX(" + this.skew + ")scale(" + this.scale + ")";
paulo@89:   };
paulo@89:   function d3_transformDot(a, b) {
paulo@89:     return a[0] * b[0] + a[1] * b[1];
paulo@89:   }
paulo@89:   function d3_transformNormalize(a) {
paulo@89:     var k = Math.sqrt(d3_transformDot(a, a));
paulo@89:     if (k) {
paulo@89:       a[0] /= k;
paulo@89:       a[1] /= k;
paulo@89:     }
paulo@89:     return k;
paulo@89:   }
paulo@89:   function d3_transformCombine(a, b, k) {
paulo@89:     a[0] += k * b[0];
paulo@89:     a[1] += k * b[1];
paulo@89:     return a;
paulo@89:   }
paulo@89:   var d3_transformIdentity = {
paulo@89:     a: 1,
paulo@89:     b: 0,
paulo@89:     c: 0,
paulo@89:     d: 1,
paulo@89:     e: 0,
paulo@89:     f: 0
paulo@89:   };
paulo@89:   d3.interpolateTransform = d3_interpolateTransform;
paulo@89:   function d3_interpolateTransformPop(s) {
paulo@89:     return s.length ? s.pop() + "," : "";
paulo@89:   }
paulo@89:   function d3_interpolateTranslate(ta, tb, s, q) {
paulo@89:     if (ta[0] !== tb[0] || ta[1] !== tb[1]) {
paulo@89:       var i = s.push("translate(", null, ",", null, ")");
paulo@89:       q.push({
paulo@89:         i: i - 4,
paulo@89:         x: d3_interpolateNumber(ta[0], tb[0])
paulo@89:       }, {
paulo@89:         i: i - 2,
paulo@89:         x: d3_interpolateNumber(ta[1], tb[1])
paulo@89:       });
paulo@89:     } else if (tb[0] || tb[1]) {
paulo@89:       s.push("translate(" + tb + ")");
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_interpolateRotate(ra, rb, s, q) {
paulo@89:     if (ra !== rb) {
paulo@89:       if (ra - rb > 180) rb += 360; else if (rb - ra > 180) ra += 360;
paulo@89:       q.push({
paulo@89:         i: s.push(d3_interpolateTransformPop(s) + "rotate(", null, ")") - 2,
paulo@89:         x: d3_interpolateNumber(ra, rb)
paulo@89:       });
paulo@89:     } else if (rb) {
paulo@89:       s.push(d3_interpolateTransformPop(s) + "rotate(" + rb + ")");
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_interpolateSkew(wa, wb, s, q) {
paulo@89:     if (wa !== wb) {
paulo@89:       q.push({
paulo@89:         i: s.push(d3_interpolateTransformPop(s) + "skewX(", null, ")") - 2,
paulo@89:         x: d3_interpolateNumber(wa, wb)
paulo@89:       });
paulo@89:     } else if (wb) {
paulo@89:       s.push(d3_interpolateTransformPop(s) + "skewX(" + wb + ")");
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_interpolateScale(ka, kb, s, q) {
paulo@89:     if (ka[0] !== kb[0] || ka[1] !== kb[1]) {
paulo@89:       var i = s.push(d3_interpolateTransformPop(s) + "scale(", null, ",", null, ")");
paulo@89:       q.push({
paulo@89:         i: i - 4,
paulo@89:         x: d3_interpolateNumber(ka[0], kb[0])
paulo@89:       }, {
paulo@89:         i: i - 2,
paulo@89:         x: d3_interpolateNumber(ka[1], kb[1])
paulo@89:       });
paulo@89:     } else if (kb[0] !== 1 || kb[1] !== 1) {
paulo@89:       s.push(d3_interpolateTransformPop(s) + "scale(" + kb + ")");
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_interpolateTransform(a, b) {
paulo@89:     var s = [], q = [];
paulo@89:     a = d3.transform(a), b = d3.transform(b);
paulo@89:     d3_interpolateTranslate(a.translate, b.translate, s, q);
paulo@89:     d3_interpolateRotate(a.rotate, b.rotate, s, q);
paulo@89:     d3_interpolateSkew(a.skew, b.skew, s, q);
paulo@89:     d3_interpolateScale(a.scale, b.scale, s, q);
paulo@89:     a = b = null;
paulo@89:     return function(t) {
paulo@89:       var i = -1, n = q.length, o;
paulo@89:       while (++i < n) s[(o = q[i]).i] = o.x(t);
paulo@89:       return s.join("");
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_uninterpolateNumber(a, b) {
paulo@89:     b = (b -= a = +a) || 1 / b;
paulo@89:     return function(x) {
paulo@89:       return (x - a) / b;
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_uninterpolateClamp(a, b) {
paulo@89:     b = (b -= a = +a) || 1 / b;
paulo@89:     return function(x) {
paulo@89:       return Math.max(0, Math.min(1, (x - a) / b));
paulo@89:     };
paulo@89:   }
paulo@89:   d3.layout = {};
paulo@89:   d3.layout.bundle = function() {
paulo@89:     return function(links) {
paulo@89:       var paths = [], i = -1, n = links.length;
paulo@89:       while (++i < n) paths.push(d3_layout_bundlePath(links[i]));
paulo@89:       return paths;
paulo@89:     };
paulo@89:   };
paulo@89:   function d3_layout_bundlePath(link) {
paulo@89:     var start = link.source, end = link.target, lca = d3_layout_bundleLeastCommonAncestor(start, end), points = [ start ];
paulo@89:     while (start !== lca) {
paulo@89:       start = start.parent;
paulo@89:       points.push(start);
paulo@89:     }
paulo@89:     var k = points.length;
paulo@89:     while (end !== lca) {
paulo@89:       points.splice(k, 0, end);
paulo@89:       end = end.parent;
paulo@89:     }
paulo@89:     return points;
paulo@89:   }
paulo@89:   function d3_layout_bundleAncestors(node) {
paulo@89:     var ancestors = [], parent = node.parent;
paulo@89:     while (parent != null) {
paulo@89:       ancestors.push(node);
paulo@89:       node = parent;
paulo@89:       parent = parent.parent;
paulo@89:     }
paulo@89:     ancestors.push(node);
paulo@89:     return ancestors;
paulo@89:   }
paulo@89:   function d3_layout_bundleLeastCommonAncestor(a, b) {
paulo@89:     if (a === b) return a;
paulo@89:     var aNodes = d3_layout_bundleAncestors(a), bNodes = d3_layout_bundleAncestors(b), aNode = aNodes.pop(), bNode = bNodes.pop(), sharedNode = null;
paulo@89:     while (aNode === bNode) {
paulo@89:       sharedNode = aNode;
paulo@89:       aNode = aNodes.pop();
paulo@89:       bNode = bNodes.pop();
paulo@89:     }
paulo@89:     return sharedNode;
paulo@89:   }
paulo@89:   d3.layout.chord = function() {
paulo@89:     var chord = {}, chords, groups, matrix, n, padding = 0, sortGroups, sortSubgroups, sortChords;
paulo@89:     function relayout() {
paulo@89:       var subgroups = {}, groupSums = [], groupIndex = d3.range(n), subgroupIndex = [], k, x, x0, i, j;
paulo@89:       chords = [];
paulo@89:       groups = [];
paulo@89:       k = 0, i = -1;
paulo@89:       while (++i < n) {
paulo@89:         x = 0, j = -1;
paulo@89:         while (++j < n) {
paulo@89:           x += matrix[i][j];
paulo@89:         }
paulo@89:         groupSums.push(x);
paulo@89:         subgroupIndex.push(d3.range(n));
paulo@89:         k += x;
paulo@89:       }
paulo@89:       if (sortGroups) {
paulo@89:         groupIndex.sort(function(a, b) {
paulo@89:           return sortGroups(groupSums[a], groupSums[b]);
paulo@89:         });
paulo@89:       }
paulo@89:       if (sortSubgroups) {
paulo@89:         subgroupIndex.forEach(function(d, i) {
paulo@89:           d.sort(function(a, b) {
paulo@89:             return sortSubgroups(matrix[i][a], matrix[i][b]);
paulo@89:           });
paulo@89:         });
paulo@89:       }
paulo@89:       k = (τ - padding * n) / k;
paulo@89:       x = 0, i = -1;
paulo@89:       while (++i < n) {
paulo@89:         x0 = x, j = -1;
paulo@89:         while (++j < n) {
paulo@89:           var di = groupIndex[i], dj = subgroupIndex[di][j], v = matrix[di][dj], a0 = x, a1 = x += v * k;
paulo@89:           subgroups[di + "-" + dj] = {
paulo@89:             index: di,
paulo@89:             subindex: dj,
paulo@89:             startAngle: a0,
paulo@89:             endAngle: a1,
paulo@89:             value: v
paulo@89:           };
paulo@89:         }
paulo@89:         groups[di] = {
paulo@89:           index: di,
paulo@89:           startAngle: x0,
paulo@89:           endAngle: x,
paulo@89:           value: groupSums[di]
paulo@89:         };
paulo@89:         x += padding;
paulo@89:       }
paulo@89:       i = -1;
paulo@89:       while (++i < n) {
paulo@89:         j = i - 1;
paulo@89:         while (++j < n) {
paulo@89:           var source = subgroups[i + "-" + j], target = subgroups[j + "-" + i];
paulo@89:           if (source.value || target.value) {
paulo@89:             chords.push(source.value < target.value ? {
paulo@89:               source: target,
paulo@89:               target: source
paulo@89:             } : {
paulo@89:               source: source,
paulo@89:               target: target
paulo@89:             });
paulo@89:           }
paulo@89:         }
paulo@89:       }
paulo@89:       if (sortChords) resort();
paulo@89:     }
paulo@89:     function resort() {
paulo@89:       chords.sort(function(a, b) {
paulo@89:         return sortChords((a.source.value + a.target.value) / 2, (b.source.value + b.target.value) / 2);
paulo@89:       });
paulo@89:     }
paulo@89:     chord.matrix = function(x) {
paulo@89:       if (!arguments.length) return matrix;
paulo@89:       n = (matrix = x) && matrix.length;
paulo@89:       chords = groups = null;
paulo@89:       return chord;
paulo@89:     };
paulo@89:     chord.padding = function(x) {
paulo@89:       if (!arguments.length) return padding;
paulo@89:       padding = x;
paulo@89:       chords = groups = null;
paulo@89:       return chord;
paulo@89:     };
paulo@89:     chord.sortGroups = function(x) {
paulo@89:       if (!arguments.length) return sortGroups;
paulo@89:       sortGroups = x;
paulo@89:       chords = groups = null;
paulo@89:       return chord;
paulo@89:     };
paulo@89:     chord.sortSubgroups = function(x) {
paulo@89:       if (!arguments.length) return sortSubgroups;
paulo@89:       sortSubgroups = x;
paulo@89:       chords = null;
paulo@89:       return chord;
paulo@89:     };
paulo@89:     chord.sortChords = function(x) {
paulo@89:       if (!arguments.length) return sortChords;
paulo@89:       sortChords = x;
paulo@89:       if (chords) resort();
paulo@89:       return chord;
paulo@89:     };
paulo@89:     chord.chords = function() {
paulo@89:       if (!chords) relayout();
paulo@89:       return chords;
paulo@89:     };
paulo@89:     chord.groups = function() {
paulo@89:       if (!groups) relayout();
paulo@89:       return groups;
paulo@89:     };
paulo@89:     return chord;
paulo@89:   };
paulo@89:   d3.layout.force = function() {
paulo@89:     var force = {}, event = d3.dispatch("start", "tick", "end"), timer, size = [ 1, 1 ], drag, alpha, friction = .9, linkDistance = d3_layout_forceLinkDistance, linkStrength = d3_layout_forceLinkStrength, charge = -30, chargeDistance2 = d3_layout_forceChargeDistance2, gravity = .1, theta2 = .64, nodes = [], links = [], distances, strengths, charges;
paulo@89:     function repulse(node) {
paulo@89:       return function(quad, x1, _, x2) {
paulo@89:         if (quad.point !== node) {
paulo@89:           var dx = quad.cx - node.x, dy = quad.cy - node.y, dw = x2 - x1, dn = dx * dx + dy * dy;
paulo@89:           if (dw * dw / theta2 < dn) {
paulo@89:             if (dn < chargeDistance2) {
paulo@89:               var k = quad.charge / dn;
paulo@89:               node.px -= dx * k;
paulo@89:               node.py -= dy * k;
paulo@89:             }
paulo@89:             return true;
paulo@89:           }
paulo@89:           if (quad.point && dn && dn < chargeDistance2) {
paulo@89:             var k = quad.pointCharge / dn;
paulo@89:             node.px -= dx * k;
paulo@89:             node.py -= dy * k;
paulo@89:           }
paulo@89:         }
paulo@89:         return !quad.charge;
paulo@89:       };
paulo@89:     }
paulo@89:     force.tick = function() {
paulo@89:       if ((alpha *= .99) < .005) {
paulo@89:         timer = null;
paulo@89:         event.end({
paulo@89:           type: "end",
paulo@89:           alpha: alpha = 0
paulo@89:         });
paulo@89:         return true;
paulo@89:       }
paulo@89:       var n = nodes.length, m = links.length, q, i, o, s, t, l, k, x, y;
paulo@89:       for (i = 0; i < m; ++i) {
paulo@89:         o = links[i];
paulo@89:         s = o.source;
paulo@89:         t = o.target;
paulo@89:         x = t.x - s.x;
paulo@89:         y = t.y - s.y;
paulo@89:         if (l = x * x + y * y) {
paulo@89:           l = alpha * strengths[i] * ((l = Math.sqrt(l)) - distances[i]) / l;
paulo@89:           x *= l;
paulo@89:           y *= l;
paulo@89:           t.x -= x * (k = s.weight + t.weight ? s.weight / (s.weight + t.weight) : .5);
paulo@89:           t.y -= y * k;
paulo@89:           s.x += x * (k = 1 - k);
paulo@89:           s.y += y * k;
paulo@89:         }
paulo@89:       }
paulo@89:       if (k = alpha * gravity) {
paulo@89:         x = size[0] / 2;
paulo@89:         y = size[1] / 2;
paulo@89:         i = -1;
paulo@89:         if (k) while (++i < n) {
paulo@89:           o = nodes[i];
paulo@89:           o.x += (x - o.x) * k;
paulo@89:           o.y += (y - o.y) * k;
paulo@89:         }
paulo@89:       }
paulo@89:       if (charge) {
paulo@89:         d3_layout_forceAccumulate(q = d3.geom.quadtree(nodes), alpha, charges);
paulo@89:         i = -1;
paulo@89:         while (++i < n) {
paulo@89:           if (!(o = nodes[i]).fixed) {
paulo@89:             q.visit(repulse(o));
paulo@89:           }
paulo@89:         }
paulo@89:       }
paulo@89:       i = -1;
paulo@89:       while (++i < n) {
paulo@89:         o = nodes[i];
paulo@89:         if (o.fixed) {
paulo@89:           o.x = o.px;
paulo@89:           o.y = o.py;
paulo@89:         } else {
paulo@89:           o.x -= (o.px - (o.px = o.x)) * friction;
paulo@89:           o.y -= (o.py - (o.py = o.y)) * friction;
paulo@89:         }
paulo@89:       }
paulo@89:       event.tick({
paulo@89:         type: "tick",
paulo@89:         alpha: alpha
paulo@89:       });
paulo@89:     };
paulo@89:     force.nodes = function(x) {
paulo@89:       if (!arguments.length) return nodes;
paulo@89:       nodes = x;
paulo@89:       return force;
paulo@89:     };
paulo@89:     force.links = function(x) {
paulo@89:       if (!arguments.length) return links;
paulo@89:       links = x;
paulo@89:       return force;
paulo@89:     };
paulo@89:     force.size = function(x) {
paulo@89:       if (!arguments.length) return size;
paulo@89:       size = x;
paulo@89:       return force;
paulo@89:     };
paulo@89:     force.linkDistance = function(x) {
paulo@89:       if (!arguments.length) return linkDistance;
paulo@89:       linkDistance = typeof x === "function" ? x : +x;
paulo@89:       return force;
paulo@89:     };
paulo@89:     force.distance = force.linkDistance;
paulo@89:     force.linkStrength = function(x) {
paulo@89:       if (!arguments.length) return linkStrength;
paulo@89:       linkStrength = typeof x === "function" ? x : +x;
paulo@89:       return force;
paulo@89:     };
paulo@89:     force.friction = function(x) {
paulo@89:       if (!arguments.length) return friction;
paulo@89:       friction = +x;
paulo@89:       return force;
paulo@89:     };
paulo@89:     force.charge = function(x) {
paulo@89:       if (!arguments.length) return charge;
paulo@89:       charge = typeof x === "function" ? x : +x;
paulo@89:       return force;
paulo@89:     };
paulo@89:     force.chargeDistance = function(x) {
paulo@89:       if (!arguments.length) return Math.sqrt(chargeDistance2);
paulo@89:       chargeDistance2 = x * x;
paulo@89:       return force;
paulo@89:     };
paulo@89:     force.gravity = function(x) {
paulo@89:       if (!arguments.length) return gravity;
paulo@89:       gravity = +x;
paulo@89:       return force;
paulo@89:     };
paulo@89:     force.theta = function(x) {
paulo@89:       if (!arguments.length) return Math.sqrt(theta2);
paulo@89:       theta2 = x * x;
paulo@89:       return force;
paulo@89:     };
paulo@89:     force.alpha = function(x) {
paulo@89:       if (!arguments.length) return alpha;
paulo@89:       x = +x;
paulo@89:       if (alpha) {
paulo@89:         if (x > 0) {
paulo@89:           alpha = x;
paulo@89:         } else {
paulo@89:           timer.c = null, timer.t = NaN, timer = null;
paulo@89:           event.end({
paulo@89:             type: "end",
paulo@89:             alpha: alpha = 0
paulo@89:           });
paulo@89:         }
paulo@89:       } else if (x > 0) {
paulo@89:         event.start({
paulo@89:           type: "start",
paulo@89:           alpha: alpha = x
paulo@89:         });
paulo@89:         timer = d3_timer(force.tick);
paulo@89:       }
paulo@89:       return force;
paulo@89:     };
paulo@89:     force.start = function() {
paulo@89:       var i, n = nodes.length, m = links.length, w = size[0], h = size[1], neighbors, o;
paulo@89:       for (i = 0; i < n; ++i) {
paulo@89:         (o = nodes[i]).index = i;
paulo@89:         o.weight = 0;
paulo@89:       }
paulo@89:       for (i = 0; i < m; ++i) {
paulo@89:         o = links[i];
paulo@89:         if (typeof o.source == "number") o.source = nodes[o.source];
paulo@89:         if (typeof o.target == "number") o.target = nodes[o.target];
paulo@89:         ++o.source.weight;
paulo@89:         ++o.target.weight;
paulo@89:       }
paulo@89:       for (i = 0; i < n; ++i) {
paulo@89:         o = nodes[i];
paulo@89:         if (isNaN(o.x)) o.x = position("x", w);
paulo@89:         if (isNaN(o.y)) o.y = position("y", h);
paulo@89:         if (isNaN(o.px)) o.px = o.x;
paulo@89:         if (isNaN(o.py)) o.py = o.y;
paulo@89:       }
paulo@89:       distances = [];
paulo@89:       if (typeof linkDistance === "function") for (i = 0; i < m; ++i) distances[i] = +linkDistance.call(this, links[i], i); else for (i = 0; i < m; ++i) distances[i] = linkDistance;
paulo@89:       strengths = [];
paulo@89:       if (typeof linkStrength === "function") for (i = 0; i < m; ++i) strengths[i] = +linkStrength.call(this, links[i], i); else for (i = 0; i < m; ++i) strengths[i] = linkStrength;
paulo@89:       charges = [];
paulo@89:       if (typeof charge === "function") for (i = 0; i < n; ++i) charges[i] = +charge.call(this, nodes[i], i); else for (i = 0; i < n; ++i) charges[i] = charge;
paulo@89:       function position(dimension, size) {
paulo@89:         if (!neighbors) {
paulo@89:           neighbors = new Array(n);
paulo@89:           for (j = 0; j < n; ++j) {
paulo@89:             neighbors[j] = [];
paulo@89:           }
paulo@89:           for (j = 0; j < m; ++j) {
paulo@89:             var o = links[j];
paulo@89:             neighbors[o.source.index].push(o.target);
paulo@89:             neighbors[o.target.index].push(o.source);
paulo@89:           }
paulo@89:         }
paulo@89:         var candidates = neighbors[i], j = -1, l = candidates.length, x;
paulo@89:         while (++j < l) if (!isNaN(x = candidates[j][dimension])) return x;
paulo@89:         return Math.random() * size;
paulo@89:       }
paulo@89:       return force.resume();
paulo@89:     };
paulo@89:     force.resume = function() {
paulo@89:       return force.alpha(.1);
paulo@89:     };
paulo@89:     force.stop = function() {
paulo@89:       return force.alpha(0);
paulo@89:     };
paulo@89:     force.drag = function() {
paulo@89:       if (!drag) drag = d3.behavior.drag().origin(d3_identity).on("dragstart.force", d3_layout_forceDragstart).on("drag.force", dragmove).on("dragend.force", d3_layout_forceDragend);
paulo@89:       if (!arguments.length) return drag;
paulo@89:       this.on("mouseover.force", d3_layout_forceMouseover).on("mouseout.force", d3_layout_forceMouseout).call(drag);
paulo@89:     };
paulo@89:     function dragmove(d) {
paulo@89:       d.px = d3.event.x, d.py = d3.event.y;
paulo@89:       force.resume();
paulo@89:     }
paulo@89:     return d3.rebind(force, event, "on");
paulo@89:   };
paulo@89:   function d3_layout_forceDragstart(d) {
paulo@89:     d.fixed |= 2;
paulo@89:   }
paulo@89:   function d3_layout_forceDragend(d) {
paulo@89:     d.fixed &= ~6;
paulo@89:   }
paulo@89:   function d3_layout_forceMouseover(d) {
paulo@89:     d.fixed |= 4;
paulo@89:     d.px = d.x, d.py = d.y;
paulo@89:   }
paulo@89:   function d3_layout_forceMouseout(d) {
paulo@89:     d.fixed &= ~4;
paulo@89:   }
paulo@89:   function d3_layout_forceAccumulate(quad, alpha, charges) {
paulo@89:     var cx = 0, cy = 0;
paulo@89:     quad.charge = 0;
paulo@89:     if (!quad.leaf) {
paulo@89:       var nodes = quad.nodes, n = nodes.length, i = -1, c;
paulo@89:       while (++i < n) {
paulo@89:         c = nodes[i];
paulo@89:         if (c == null) continue;
paulo@89:         d3_layout_forceAccumulate(c, alpha, charges);
paulo@89:         quad.charge += c.charge;
paulo@89:         cx += c.charge * c.cx;
paulo@89:         cy += c.charge * c.cy;
paulo@89:       }
paulo@89:     }
paulo@89:     if (quad.point) {
paulo@89:       if (!quad.leaf) {
paulo@89:         quad.point.x += Math.random() - .5;
paulo@89:         quad.point.y += Math.random() - .5;
paulo@89:       }
paulo@89:       var k = alpha * charges[quad.point.index];
paulo@89:       quad.charge += quad.pointCharge = k;
paulo@89:       cx += k * quad.point.x;
paulo@89:       cy += k * quad.point.y;
paulo@89:     }
paulo@89:     quad.cx = cx / quad.charge;
paulo@89:     quad.cy = cy / quad.charge;
paulo@89:   }
paulo@89:   var d3_layout_forceLinkDistance = 20, d3_layout_forceLinkStrength = 1, d3_layout_forceChargeDistance2 = Infinity;
paulo@89:   d3.layout.hierarchy = function() {
paulo@89:     var sort = d3_layout_hierarchySort, children = d3_layout_hierarchyChildren, value = d3_layout_hierarchyValue;
paulo@89:     function hierarchy(root) {
paulo@89:       var stack = [ root ], nodes = [], node;
paulo@89:       root.depth = 0;
paulo@89:       while ((node = stack.pop()) != null) {
paulo@89:         nodes.push(node);
paulo@89:         if ((childs = children.call(hierarchy, node, node.depth)) && (n = childs.length)) {
paulo@89:           var n, childs, child;
paulo@89:           while (--n >= 0) {
paulo@89:             stack.push(child = childs[n]);
paulo@89:             child.parent = node;
paulo@89:             child.depth = node.depth + 1;
paulo@89:           }
paulo@89:           if (value) node.value = 0;
paulo@89:           node.children = childs;
paulo@89:         } else {
paulo@89:           if (value) node.value = +value.call(hierarchy, node, node.depth) || 0;
paulo@89:           delete node.children;
paulo@89:         }
paulo@89:       }
paulo@89:       d3_layout_hierarchyVisitAfter(root, function(node) {
paulo@89:         var childs, parent;
paulo@89:         if (sort && (childs = node.children)) childs.sort(sort);
paulo@89:         if (value && (parent = node.parent)) parent.value += node.value;
paulo@89:       });
paulo@89:       return nodes;
paulo@89:     }
paulo@89:     hierarchy.sort = function(x) {
paulo@89:       if (!arguments.length) return sort;
paulo@89:       sort = x;
paulo@89:       return hierarchy;
paulo@89:     };
paulo@89:     hierarchy.children = function(x) {
paulo@89:       if (!arguments.length) return children;
paulo@89:       children = x;
paulo@89:       return hierarchy;
paulo@89:     };
paulo@89:     hierarchy.value = function(x) {
paulo@89:       if (!arguments.length) return value;
paulo@89:       value = x;
paulo@89:       return hierarchy;
paulo@89:     };
paulo@89:     hierarchy.revalue = function(root) {
paulo@89:       if (value) {
paulo@89:         d3_layout_hierarchyVisitBefore(root, function(node) {
paulo@89:           if (node.children) node.value = 0;
paulo@89:         });
paulo@89:         d3_layout_hierarchyVisitAfter(root, function(node) {
paulo@89:           var parent;
paulo@89:           if (!node.children) node.value = +value.call(hierarchy, node, node.depth) || 0;
paulo@89:           if (parent = node.parent) parent.value += node.value;
paulo@89:         });
paulo@89:       }
paulo@89:       return root;
paulo@89:     };
paulo@89:     return hierarchy;
paulo@89:   };
paulo@89:   function d3_layout_hierarchyRebind(object, hierarchy) {
paulo@89:     d3.rebind(object, hierarchy, "sort", "children", "value");
paulo@89:     object.nodes = object;
paulo@89:     object.links = d3_layout_hierarchyLinks;
paulo@89:     return object;
paulo@89:   }
paulo@89:   function d3_layout_hierarchyVisitBefore(node, callback) {
paulo@89:     var nodes = [ node ];
paulo@89:     while ((node = nodes.pop()) != null) {
paulo@89:       callback(node);
paulo@89:       if ((children = node.children) && (n = children.length)) {
paulo@89:         var n, children;
paulo@89:         while (--n >= 0) nodes.push(children[n]);
paulo@89:       }
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_layout_hierarchyVisitAfter(node, callback) {
paulo@89:     var nodes = [ node ], nodes2 = [];
paulo@89:     while ((node = nodes.pop()) != null) {
paulo@89:       nodes2.push(node);
paulo@89:       if ((children = node.children) && (n = children.length)) {
paulo@89:         var i = -1, n, children;
paulo@89:         while (++i < n) nodes.push(children[i]);
paulo@89:       }
paulo@89:     }
paulo@89:     while ((node = nodes2.pop()) != null) {
paulo@89:       callback(node);
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_layout_hierarchyChildren(d) {
paulo@89:     return d.children;
paulo@89:   }
paulo@89:   function d3_layout_hierarchyValue(d) {
paulo@89:     return d.value;
paulo@89:   }
paulo@89:   function d3_layout_hierarchySort(a, b) {
paulo@89:     return b.value - a.value;
paulo@89:   }
paulo@89:   function d3_layout_hierarchyLinks(nodes) {
paulo@89:     return d3.merge(nodes.map(function(parent) {
paulo@89:       return (parent.children || []).map(function(child) {
paulo@89:         return {
paulo@89:           source: parent,
paulo@89:           target: child
paulo@89:         };
paulo@89:       });
paulo@89:     }));
paulo@89:   }
paulo@89:   d3.layout.partition = function() {
paulo@89:     var hierarchy = d3.layout.hierarchy(), size = [ 1, 1 ];
paulo@89:     function position(node, x, dx, dy) {
paulo@89:       var children = node.children;
paulo@89:       node.x = x;
paulo@89:       node.y = node.depth * dy;
paulo@89:       node.dx = dx;
paulo@89:       node.dy = dy;
paulo@89:       if (children && (n = children.length)) {
paulo@89:         var i = -1, n, c, d;
paulo@89:         dx = node.value ? dx / node.value : 0;
paulo@89:         while (++i < n) {
paulo@89:           position(c = children[i], x, d = c.value * dx, dy);
paulo@89:           x += d;
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     function depth(node) {
paulo@89:       var children = node.children, d = 0;
paulo@89:       if (children && (n = children.length)) {
paulo@89:         var i = -1, n;
paulo@89:         while (++i < n) d = Math.max(d, depth(children[i]));
paulo@89:       }
paulo@89:       return 1 + d;
paulo@89:     }
paulo@89:     function partition(d, i) {
paulo@89:       var nodes = hierarchy.call(this, d, i);
paulo@89:       position(nodes[0], 0, size[0], size[1] / depth(nodes[0]));
paulo@89:       return nodes;
paulo@89:     }
paulo@89:     partition.size = function(x) {
paulo@89:       if (!arguments.length) return size;
paulo@89:       size = x;
paulo@89:       return partition;
paulo@89:     };
paulo@89:     return d3_layout_hierarchyRebind(partition, hierarchy);
paulo@89:   };
paulo@89:   d3.layout.pie = function() {
paulo@89:     var value = Number, sort = d3_layout_pieSortByValue, startAngle = 0, endAngle = τ, padAngle = 0;
paulo@89:     function pie(data) {
paulo@89:       var n = data.length, values = data.map(function(d, i) {
paulo@89:         return +value.call(pie, d, i);
paulo@89:       }), a = +(typeof startAngle === "function" ? startAngle.apply(this, arguments) : startAngle), da = (typeof endAngle === "function" ? endAngle.apply(this, arguments) : endAngle) - a, p = Math.min(Math.abs(da) / n, +(typeof padAngle === "function" ? padAngle.apply(this, arguments) : padAngle)), pa = p * (da < 0 ? -1 : 1), sum = d3.sum(values), k = sum ? (da - n * pa) / sum : 0, index = d3.range(n), arcs = [], v;
paulo@89:       if (sort != null) index.sort(sort === d3_layout_pieSortByValue ? function(i, j) {
paulo@89:         return values[j] - values[i];
paulo@89:       } : function(i, j) {
paulo@89:         return sort(data[i], data[j]);
paulo@89:       });
paulo@89:       index.forEach(function(i) {
paulo@89:         arcs[i] = {
paulo@89:           data: data[i],
paulo@89:           value: v = values[i],
paulo@89:           startAngle: a,
paulo@89:           endAngle: a += v * k + pa,
paulo@89:           padAngle: p
paulo@89:         };
paulo@89:       });
paulo@89:       return arcs;
paulo@89:     }
paulo@89:     pie.value = function(_) {
paulo@89:       if (!arguments.length) return value;
paulo@89:       value = _;
paulo@89:       return pie;
paulo@89:     };
paulo@89:     pie.sort = function(_) {
paulo@89:       if (!arguments.length) return sort;
paulo@89:       sort = _;
paulo@89:       return pie;
paulo@89:     };
paulo@89:     pie.startAngle = function(_) {
paulo@89:       if (!arguments.length) return startAngle;
paulo@89:       startAngle = _;
paulo@89:       return pie;
paulo@89:     };
paulo@89:     pie.endAngle = function(_) {
paulo@89:       if (!arguments.length) return endAngle;
paulo@89:       endAngle = _;
paulo@89:       return pie;
paulo@89:     };
paulo@89:     pie.padAngle = function(_) {
paulo@89:       if (!arguments.length) return padAngle;
paulo@89:       padAngle = _;
paulo@89:       return pie;
paulo@89:     };
paulo@89:     return pie;
paulo@89:   };
paulo@89:   var d3_layout_pieSortByValue = {};
paulo@89:   d3.layout.stack = function() {
paulo@89:     var values = d3_identity, order = d3_layout_stackOrderDefault, offset = d3_layout_stackOffsetZero, out = d3_layout_stackOut, x = d3_layout_stackX, y = d3_layout_stackY;
paulo@89:     function stack(data, index) {
paulo@89:       if (!(n = data.length)) return data;
paulo@89:       var series = data.map(function(d, i) {
paulo@89:         return values.call(stack, d, i);
paulo@89:       });
paulo@89:       var points = series.map(function(d) {
paulo@89:         return d.map(function(v, i) {
paulo@89:           return [ x.call(stack, v, i), y.call(stack, v, i) ];
paulo@89:         });
paulo@89:       });
paulo@89:       var orders = order.call(stack, points, index);
paulo@89:       series = d3.permute(series, orders);
paulo@89:       points = d3.permute(points, orders);
paulo@89:       var offsets = offset.call(stack, points, index);
paulo@89:       var m = series[0].length, n, i, j, o;
paulo@89:       for (j = 0; j < m; ++j) {
paulo@89:         out.call(stack, series[0][j], o = offsets[j], points[0][j][1]);
paulo@89:         for (i = 1; i < n; ++i) {
paulo@89:           out.call(stack, series[i][j], o += points[i - 1][j][1], points[i][j][1]);
paulo@89:         }
paulo@89:       }
paulo@89:       return data;
paulo@89:     }
paulo@89:     stack.values = function(x) {
paulo@89:       if (!arguments.length) return values;
paulo@89:       values = x;
paulo@89:       return stack;
paulo@89:     };
paulo@89:     stack.order = function(x) {
paulo@89:       if (!arguments.length) return order;
paulo@89:       order = typeof x === "function" ? x : d3_layout_stackOrders.get(x) || d3_layout_stackOrderDefault;
paulo@89:       return stack;
paulo@89:     };
paulo@89:     stack.offset = function(x) {
paulo@89:       if (!arguments.length) return offset;
paulo@89:       offset = typeof x === "function" ? x : d3_layout_stackOffsets.get(x) || d3_layout_stackOffsetZero;
paulo@89:       return stack;
paulo@89:     };
paulo@89:     stack.x = function(z) {
paulo@89:       if (!arguments.length) return x;
paulo@89:       x = z;
paulo@89:       return stack;
paulo@89:     };
paulo@89:     stack.y = function(z) {
paulo@89:       if (!arguments.length) return y;
paulo@89:       y = z;
paulo@89:       return stack;
paulo@89:     };
paulo@89:     stack.out = function(z) {
paulo@89:       if (!arguments.length) return out;
paulo@89:       out = z;
paulo@89:       return stack;
paulo@89:     };
paulo@89:     return stack;
paulo@89:   };
paulo@89:   function d3_layout_stackX(d) {
paulo@89:     return d.x;
paulo@89:   }
paulo@89:   function d3_layout_stackY(d) {
paulo@89:     return d.y;
paulo@89:   }
paulo@89:   function d3_layout_stackOut(d, y0, y) {
paulo@89:     d.y0 = y0;
paulo@89:     d.y = y;
paulo@89:   }
paulo@89:   var d3_layout_stackOrders = d3.map({
paulo@89:     "inside-out": function(data) {
paulo@89:       var n = data.length, i, j, max = data.map(d3_layout_stackMaxIndex), sums = data.map(d3_layout_stackReduceSum), index = d3.range(n).sort(function(a, b) {
paulo@89:         return max[a] - max[b];
paulo@89:       }), top = 0, bottom = 0, tops = [], bottoms = [];
paulo@89:       for (i = 0; i < n; ++i) {
paulo@89:         j = index[i];
paulo@89:         if (top < bottom) {
paulo@89:           top += sums[j];
paulo@89:           tops.push(j);
paulo@89:         } else {
paulo@89:           bottom += sums[j];
paulo@89:           bottoms.push(j);
paulo@89:         }
paulo@89:       }
paulo@89:       return bottoms.reverse().concat(tops);
paulo@89:     },
paulo@89:     reverse: function(data) {
paulo@89:       return d3.range(data.length).reverse();
paulo@89:     },
paulo@89:     "default": d3_layout_stackOrderDefault
paulo@89:   });
paulo@89:   var d3_layout_stackOffsets = d3.map({
paulo@89:     silhouette: function(data) {
paulo@89:       var n = data.length, m = data[0].length, sums = [], max = 0, i, j, o, y0 = [];
paulo@89:       for (j = 0; j < m; ++j) {
paulo@89:         for (i = 0, o = 0; i < n; i++) o += data[i][j][1];
paulo@89:         if (o > max) max = o;
paulo@89:         sums.push(o);
paulo@89:       }
paulo@89:       for (j = 0; j < m; ++j) {
paulo@89:         y0[j] = (max - sums[j]) / 2;
paulo@89:       }
paulo@89:       return y0;
paulo@89:     },
paulo@89:     wiggle: function(data) {
paulo@89:       var n = data.length, x = data[0], m = x.length, i, j, k, s1, s2, s3, dx, o, o0, y0 = [];
paulo@89:       y0[0] = o = o0 = 0;
paulo@89:       for (j = 1; j < m; ++j) {
paulo@89:         for (i = 0, s1 = 0; i < n; ++i) s1 += data[i][j][1];
paulo@89:         for (i = 0, s2 = 0, dx = x[j][0] - x[j - 1][0]; i < n; ++i) {
paulo@89:           for (k = 0, s3 = (data[i][j][1] - data[i][j - 1][1]) / (2 * dx); k < i; ++k) {
paulo@89:             s3 += (data[k][j][1] - data[k][j - 1][1]) / dx;
paulo@89:           }
paulo@89:           s2 += s3 * data[i][j][1];
paulo@89:         }
paulo@89:         y0[j] = o -= s1 ? s2 / s1 * dx : 0;
paulo@89:         if (o < o0) o0 = o;
paulo@89:       }
paulo@89:       for (j = 0; j < m; ++j) y0[j] -= o0;
paulo@89:       return y0;
paulo@89:     },
paulo@89:     expand: function(data) {
paulo@89:       var n = data.length, m = data[0].length, k = 1 / n, i, j, o, y0 = [];
paulo@89:       for (j = 0; j < m; ++j) {
paulo@89:         for (i = 0, o = 0; i < n; i++) o += data[i][j][1];
paulo@89:         if (o) for (i = 0; i < n; i++) data[i][j][1] /= o; else for (i = 0; i < n; i++) data[i][j][1] = k;
paulo@89:       }
paulo@89:       for (j = 0; j < m; ++j) y0[j] = 0;
paulo@89:       return y0;
paulo@89:     },
paulo@89:     zero: d3_layout_stackOffsetZero
paulo@89:   });
paulo@89:   function d3_layout_stackOrderDefault(data) {
paulo@89:     return d3.range(data.length);
paulo@89:   }
paulo@89:   function d3_layout_stackOffsetZero(data) {
paulo@89:     var j = -1, m = data[0].length, y0 = [];
paulo@89:     while (++j < m) y0[j] = 0;
paulo@89:     return y0;
paulo@89:   }
paulo@89:   function d3_layout_stackMaxIndex(array) {
paulo@89:     var i = 1, j = 0, v = array[0][1], k, n = array.length;
paulo@89:     for (;i < n; ++i) {
paulo@89:       if ((k = array[i][1]) > v) {
paulo@89:         j = i;
paulo@89:         v = k;
paulo@89:       }
paulo@89:     }
paulo@89:     return j;
paulo@89:   }
paulo@89:   function d3_layout_stackReduceSum(d) {
paulo@89:     return d.reduce(d3_layout_stackSum, 0);
paulo@89:   }
paulo@89:   function d3_layout_stackSum(p, d) {
paulo@89:     return p + d[1];
paulo@89:   }
paulo@89:   d3.layout.histogram = function() {
paulo@89:     var frequency = true, valuer = Number, ranger = d3_layout_histogramRange, binner = d3_layout_histogramBinSturges;
paulo@89:     function histogram(data, i) {
paulo@89:       var bins = [], values = data.map(valuer, this), range = ranger.call(this, values, i), thresholds = binner.call(this, range, values, i), bin, i = -1, n = values.length, m = thresholds.length - 1, k = frequency ? 1 : 1 / n, x;
paulo@89:       while (++i < m) {
paulo@89:         bin = bins[i] = [];
paulo@89:         bin.dx = thresholds[i + 1] - (bin.x = thresholds[i]);
paulo@89:         bin.y = 0;
paulo@89:       }
paulo@89:       if (m > 0) {
paulo@89:         i = -1;
paulo@89:         while (++i < n) {
paulo@89:           x = values[i];
paulo@89:           if (x >= range[0] && x <= range[1]) {
paulo@89:             bin = bins[d3.bisect(thresholds, x, 1, m) - 1];
paulo@89:             bin.y += k;
paulo@89:             bin.push(data[i]);
paulo@89:           }
paulo@89:         }
paulo@89:       }
paulo@89:       return bins;
paulo@89:     }
paulo@89:     histogram.value = function(x) {
paulo@89:       if (!arguments.length) return valuer;
paulo@89:       valuer = x;
paulo@89:       return histogram;
paulo@89:     };
paulo@89:     histogram.range = function(x) {
paulo@89:       if (!arguments.length) return ranger;
paulo@89:       ranger = d3_functor(x);
paulo@89:       return histogram;
paulo@89:     };
paulo@89:     histogram.bins = function(x) {
paulo@89:       if (!arguments.length) return binner;
paulo@89:       binner = typeof x === "number" ? function(range) {
paulo@89:         return d3_layout_histogramBinFixed(range, x);
paulo@89:       } : d3_functor(x);
paulo@89:       return histogram;
paulo@89:     };
paulo@89:     histogram.frequency = function(x) {
paulo@89:       if (!arguments.length) return frequency;
paulo@89:       frequency = !!x;
paulo@89:       return histogram;
paulo@89:     };
paulo@89:     return histogram;
paulo@89:   };
paulo@89:   function d3_layout_histogramBinSturges(range, values) {
paulo@89:     return d3_layout_histogramBinFixed(range, Math.ceil(Math.log(values.length) / Math.LN2 + 1));
paulo@89:   }
paulo@89:   function d3_layout_histogramBinFixed(range, n) {
paulo@89:     var x = -1, b = +range[0], m = (range[1] - b) / n, f = [];
paulo@89:     while (++x <= n) f[x] = m * x + b;
paulo@89:     return f;
paulo@89:   }
paulo@89:   function d3_layout_histogramRange(values) {
paulo@89:     return [ d3.min(values), d3.max(values) ];
paulo@89:   }
paulo@89:   d3.layout.pack = function() {
paulo@89:     var hierarchy = d3.layout.hierarchy().sort(d3_layout_packSort), padding = 0, size = [ 1, 1 ], radius;
paulo@89:     function pack(d, i) {
paulo@89:       var nodes = hierarchy.call(this, d, i), root = nodes[0], w = size[0], h = size[1], r = radius == null ? Math.sqrt : typeof radius === "function" ? radius : function() {
paulo@89:         return radius;
paulo@89:       };
paulo@89:       root.x = root.y = 0;
paulo@89:       d3_layout_hierarchyVisitAfter(root, function(d) {
paulo@89:         d.r = +r(d.value);
paulo@89:       });
paulo@89:       d3_layout_hierarchyVisitAfter(root, d3_layout_packSiblings);
paulo@89:       if (padding) {
paulo@89:         var dr = padding * (radius ? 1 : Math.max(2 * root.r / w, 2 * root.r / h)) / 2;
paulo@89:         d3_layout_hierarchyVisitAfter(root, function(d) {
paulo@89:           d.r += dr;
paulo@89:         });
paulo@89:         d3_layout_hierarchyVisitAfter(root, d3_layout_packSiblings);
paulo@89:         d3_layout_hierarchyVisitAfter(root, function(d) {
paulo@89:           d.r -= dr;
paulo@89:         });
paulo@89:       }
paulo@89:       d3_layout_packTransform(root, w / 2, h / 2, radius ? 1 : 1 / Math.max(2 * root.r / w, 2 * root.r / h));
paulo@89:       return nodes;
paulo@89:     }
paulo@89:     pack.size = function(_) {
paulo@89:       if (!arguments.length) return size;
paulo@89:       size = _;
paulo@89:       return pack;
paulo@89:     };
paulo@89:     pack.radius = function(_) {
paulo@89:       if (!arguments.length) return radius;
paulo@89:       radius = _ == null || typeof _ === "function" ? _ : +_;
paulo@89:       return pack;
paulo@89:     };
paulo@89:     pack.padding = function(_) {
paulo@89:       if (!arguments.length) return padding;
paulo@89:       padding = +_;
paulo@89:       return pack;
paulo@89:     };
paulo@89:     return d3_layout_hierarchyRebind(pack, hierarchy);
paulo@89:   };
paulo@89:   function d3_layout_packSort(a, b) {
paulo@89:     return a.value - b.value;
paulo@89:   }
paulo@89:   function d3_layout_packInsert(a, b) {
paulo@89:     var c = a._pack_next;
paulo@89:     a._pack_next = b;
paulo@89:     b._pack_prev = a;
paulo@89:     b._pack_next = c;
paulo@89:     c._pack_prev = b;
paulo@89:   }
paulo@89:   function d3_layout_packSplice(a, b) {
paulo@89:     a._pack_next = b;
paulo@89:     b._pack_prev = a;
paulo@89:   }
paulo@89:   function d3_layout_packIntersects(a, b) {
paulo@89:     var dx = b.x - a.x, dy = b.y - a.y, dr = a.r + b.r;
paulo@89:     return .999 * dr * dr > dx * dx + dy * dy;
paulo@89:   }
paulo@89:   function d3_layout_packSiblings(node) {
paulo@89:     if (!(nodes = node.children) || !(n = nodes.length)) return;
paulo@89:     var nodes, xMin = Infinity, xMax = -Infinity, yMin = Infinity, yMax = -Infinity, a, b, c, i, j, k, n;
paulo@89:     function bound(node) {
paulo@89:       xMin = Math.min(node.x - node.r, xMin);
paulo@89:       xMax = Math.max(node.x + node.r, xMax);
paulo@89:       yMin = Math.min(node.y - node.r, yMin);
paulo@89:       yMax = Math.max(node.y + node.r, yMax);
paulo@89:     }
paulo@89:     nodes.forEach(d3_layout_packLink);
paulo@89:     a = nodes[0];
paulo@89:     a.x = -a.r;
paulo@89:     a.y = 0;
paulo@89:     bound(a);
paulo@89:     if (n > 1) {
paulo@89:       b = nodes[1];
paulo@89:       b.x = b.r;
paulo@89:       b.y = 0;
paulo@89:       bound(b);
paulo@89:       if (n > 2) {
paulo@89:         c = nodes[2];
paulo@89:         d3_layout_packPlace(a, b, c);
paulo@89:         bound(c);
paulo@89:         d3_layout_packInsert(a, c);
paulo@89:         a._pack_prev = c;
paulo@89:         d3_layout_packInsert(c, b);
paulo@89:         b = a._pack_next;
paulo@89:         for (i = 3; i < n; i++) {
paulo@89:           d3_layout_packPlace(a, b, c = nodes[i]);
paulo@89:           var isect = 0, s1 = 1, s2 = 1;
paulo@89:           for (j = b._pack_next; j !== b; j = j._pack_next, s1++) {
paulo@89:             if (d3_layout_packIntersects(j, c)) {
paulo@89:               isect = 1;
paulo@89:               break;
paulo@89:             }
paulo@89:           }
paulo@89:           if (isect == 1) {
paulo@89:             for (k = a._pack_prev; k !== j._pack_prev; k = k._pack_prev, s2++) {
paulo@89:               if (d3_layout_packIntersects(k, c)) {
paulo@89:                 break;
paulo@89:               }
paulo@89:             }
paulo@89:           }
paulo@89:           if (isect) {
paulo@89:             if (s1 < s2 || s1 == s2 && b.r < a.r) d3_layout_packSplice(a, b = j); else d3_layout_packSplice(a = k, b);
paulo@89:             i--;
paulo@89:           } else {
paulo@89:             d3_layout_packInsert(a, c);
paulo@89:             b = c;
paulo@89:             bound(c);
paulo@89:           }
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     var cx = (xMin + xMax) / 2, cy = (yMin + yMax) / 2, cr = 0;
paulo@89:     for (i = 0; i < n; i++) {
paulo@89:       c = nodes[i];
paulo@89:       c.x -= cx;
paulo@89:       c.y -= cy;
paulo@89:       cr = Math.max(cr, c.r + Math.sqrt(c.x * c.x + c.y * c.y));
paulo@89:     }
paulo@89:     node.r = cr;
paulo@89:     nodes.forEach(d3_layout_packUnlink);
paulo@89:   }
paulo@89:   function d3_layout_packLink(node) {
paulo@89:     node._pack_next = node._pack_prev = node;
paulo@89:   }
paulo@89:   function d3_layout_packUnlink(node) {
paulo@89:     delete node._pack_next;
paulo@89:     delete node._pack_prev;
paulo@89:   }
paulo@89:   function d3_layout_packTransform(node, x, y, k) {
paulo@89:     var children = node.children;
paulo@89:     node.x = x += k * node.x;
paulo@89:     node.y = y += k * node.y;
paulo@89:     node.r *= k;
paulo@89:     if (children) {
paulo@89:       var i = -1, n = children.length;
paulo@89:       while (++i < n) d3_layout_packTransform(children[i], x, y, k);
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_layout_packPlace(a, b, c) {
paulo@89:     var db = a.r + c.r, dx = b.x - a.x, dy = b.y - a.y;
paulo@89:     if (db && (dx || dy)) {
paulo@89:       var da = b.r + c.r, dc = dx * dx + dy * dy;
paulo@89:       da *= da;
paulo@89:       db *= db;
paulo@89:       var x = .5 + (db - da) / (2 * dc), y = Math.sqrt(Math.max(0, 2 * da * (db + dc) - (db -= dc) * db - da * da)) / (2 * dc);
paulo@89:       c.x = a.x + x * dx + y * dy;
paulo@89:       c.y = a.y + x * dy - y * dx;
paulo@89:     } else {
paulo@89:       c.x = a.x + db;
paulo@89:       c.y = a.y;
paulo@89:     }
paulo@89:   }
paulo@89:   d3.layout.tree = function() {
paulo@89:     var hierarchy = d3.layout.hierarchy().sort(null).value(null), separation = d3_layout_treeSeparation, size = [ 1, 1 ], nodeSize = null;
paulo@89:     function tree(d, i) {
paulo@89:       var nodes = hierarchy.call(this, d, i), root0 = nodes[0], root1 = wrapTree(root0);
paulo@89:       d3_layout_hierarchyVisitAfter(root1, firstWalk), root1.parent.m = -root1.z;
paulo@89:       d3_layout_hierarchyVisitBefore(root1, secondWalk);
paulo@89:       if (nodeSize) d3_layout_hierarchyVisitBefore(root0, sizeNode); else {
paulo@89:         var left = root0, right = root0, bottom = root0;
paulo@89:         d3_layout_hierarchyVisitBefore(root0, function(node) {
paulo@89:           if (node.x < left.x) left = node;
paulo@89:           if (node.x > right.x) right = node;
paulo@89:           if (node.depth > bottom.depth) bottom = node;
paulo@89:         });
paulo@89:         var tx = separation(left, right) / 2 - left.x, kx = size[0] / (right.x + separation(right, left) / 2 + tx), ky = size[1] / (bottom.depth || 1);
paulo@89:         d3_layout_hierarchyVisitBefore(root0, function(node) {
paulo@89:           node.x = (node.x + tx) * kx;
paulo@89:           node.y = node.depth * ky;
paulo@89:         });
paulo@89:       }
paulo@89:       return nodes;
paulo@89:     }
paulo@89:     function wrapTree(root0) {
paulo@89:       var root1 = {
paulo@89:         A: null,
paulo@89:         children: [ root0 ]
paulo@89:       }, queue = [ root1 ], node1;
paulo@89:       while ((node1 = queue.pop()) != null) {
paulo@89:         for (var children = node1.children, child, i = 0, n = children.length; i < n; ++i) {
paulo@89:           queue.push((children[i] = child = {
paulo@89:             _: children[i],
paulo@89:             parent: node1,
paulo@89:             children: (child = children[i].children) && child.slice() || [],
paulo@89:             A: null,
paulo@89:             a: null,
paulo@89:             z: 0,
paulo@89:             m: 0,
paulo@89:             c: 0,
paulo@89:             s: 0,
paulo@89:             t: null,
paulo@89:             i: i
paulo@89:           }).a = child);
paulo@89:         }
paulo@89:       }
paulo@89:       return root1.children[0];
paulo@89:     }
paulo@89:     function firstWalk(v) {
paulo@89:       var children = v.children, siblings = v.parent.children, w = v.i ? siblings[v.i - 1] : null;
paulo@89:       if (children.length) {
paulo@89:         d3_layout_treeShift(v);
paulo@89:         var midpoint = (children[0].z + children[children.length - 1].z) / 2;
paulo@89:         if (w) {
paulo@89:           v.z = w.z + separation(v._, w._);
paulo@89:           v.m = v.z - midpoint;
paulo@89:         } else {
paulo@89:           v.z = midpoint;
paulo@89:         }
paulo@89:       } else if (w) {
paulo@89:         v.z = w.z + separation(v._, w._);
paulo@89:       }
paulo@89:       v.parent.A = apportion(v, w, v.parent.A || siblings[0]);
paulo@89:     }
paulo@89:     function secondWalk(v) {
paulo@89:       v._.x = v.z + v.parent.m;
paulo@89:       v.m += v.parent.m;
paulo@89:     }
paulo@89:     function apportion(v, w, ancestor) {
paulo@89:       if (w) {
paulo@89:         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;
paulo@89:         while (vim = d3_layout_treeRight(vim), vip = d3_layout_treeLeft(vip), vim && vip) {
paulo@89:           vom = d3_layout_treeLeft(vom);
paulo@89:           vop = d3_layout_treeRight(vop);
paulo@89:           vop.a = v;
paulo@89:           shift = vim.z + sim - vip.z - sip + separation(vim._, vip._);
paulo@89:           if (shift > 0) {
paulo@89:             d3_layout_treeMove(d3_layout_treeAncestor(vim, v, ancestor), v, shift);
paulo@89:             sip += shift;
paulo@89:             sop += shift;
paulo@89:           }
paulo@89:           sim += vim.m;
paulo@89:           sip += vip.m;
paulo@89:           som += vom.m;
paulo@89:           sop += vop.m;
paulo@89:         }
paulo@89:         if (vim && !d3_layout_treeRight(vop)) {
paulo@89:           vop.t = vim;
paulo@89:           vop.m += sim - sop;
paulo@89:         }
paulo@89:         if (vip && !d3_layout_treeLeft(vom)) {
paulo@89:           vom.t = vip;
paulo@89:           vom.m += sip - som;
paulo@89:           ancestor = v;
paulo@89:         }
paulo@89:       }
paulo@89:       return ancestor;
paulo@89:     }
paulo@89:     function sizeNode(node) {
paulo@89:       node.x *= size[0];
paulo@89:       node.y = node.depth * size[1];
paulo@89:     }
paulo@89:     tree.separation = function(x) {
paulo@89:       if (!arguments.length) return separation;
paulo@89:       separation = x;
paulo@89:       return tree;
paulo@89:     };
paulo@89:     tree.size = function(x) {
paulo@89:       if (!arguments.length) return nodeSize ? null : size;
paulo@89:       nodeSize = (size = x) == null ? sizeNode : null;
paulo@89:       return tree;
paulo@89:     };
paulo@89:     tree.nodeSize = function(x) {
paulo@89:       if (!arguments.length) return nodeSize ? size : null;
paulo@89:       nodeSize = (size = x) == null ? null : sizeNode;
paulo@89:       return tree;
paulo@89:     };
paulo@89:     return d3_layout_hierarchyRebind(tree, hierarchy);
paulo@89:   };
paulo@89:   function d3_layout_treeSeparation(a, b) {
paulo@89:     return a.parent == b.parent ? 1 : 2;
paulo@89:   }
paulo@89:   function d3_layout_treeLeft(v) {
paulo@89:     var children = v.children;
paulo@89:     return children.length ? children[0] : v.t;
paulo@89:   }
paulo@89:   function d3_layout_treeRight(v) {
paulo@89:     var children = v.children, n;
paulo@89:     return (n = children.length) ? children[n - 1] : v.t;
paulo@89:   }
paulo@89:   function d3_layout_treeMove(wm, wp, shift) {
paulo@89:     var change = shift / (wp.i - wm.i);
paulo@89:     wp.c -= change;
paulo@89:     wp.s += shift;
paulo@89:     wm.c += change;
paulo@89:     wp.z += shift;
paulo@89:     wp.m += shift;
paulo@89:   }
paulo@89:   function d3_layout_treeShift(v) {
paulo@89:     var shift = 0, change = 0, children = v.children, i = children.length, w;
paulo@89:     while (--i >= 0) {
paulo@89:       w = children[i];
paulo@89:       w.z += shift;
paulo@89:       w.m += shift;
paulo@89:       shift += w.s + (change += w.c);
paulo@89:     }
paulo@89:   }
paulo@89:   function d3_layout_treeAncestor(vim, v, ancestor) {
paulo@89:     return vim.a.parent === v.parent ? vim.a : ancestor;
paulo@89:   }
paulo@89:   d3.layout.cluster = function() {
paulo@89:     var hierarchy = d3.layout.hierarchy().sort(null).value(null), separation = d3_layout_treeSeparation, size = [ 1, 1 ], nodeSize = false;
paulo@89:     function cluster(d, i) {
paulo@89:       var nodes = hierarchy.call(this, d, i), root = nodes[0], previousNode, x = 0;
paulo@89:       d3_layout_hierarchyVisitAfter(root, function(node) {
paulo@89:         var children = node.children;
paulo@89:         if (children && children.length) {
paulo@89:           node.x = d3_layout_clusterX(children);
paulo@89:           node.y = d3_layout_clusterY(children);
paulo@89:         } else {
paulo@89:           node.x = previousNode ? x += separation(node, previousNode) : 0;
paulo@89:           node.y = 0;
paulo@89:           previousNode = node;
paulo@89:         }
paulo@89:       });
paulo@89:       var left = d3_layout_clusterLeft(root), right = d3_layout_clusterRight(root), x0 = left.x - separation(left, right) / 2, x1 = right.x + separation(right, left) / 2;
paulo@89:       d3_layout_hierarchyVisitAfter(root, nodeSize ? function(node) {
paulo@89:         node.x = (node.x - root.x) * size[0];
paulo@89:         node.y = (root.y - node.y) * size[1];
paulo@89:       } : function(node) {
paulo@89:         node.x = (node.x - x0) / (x1 - x0) * size[0];
paulo@89:         node.y = (1 - (root.y ? node.y / root.y : 1)) * size[1];
paulo@89:       });
paulo@89:       return nodes;
paulo@89:     }
paulo@89:     cluster.separation = function(x) {
paulo@89:       if (!arguments.length) return separation;
paulo@89:       separation = x;
paulo@89:       return cluster;
paulo@89:     };
paulo@89:     cluster.size = function(x) {
paulo@89:       if (!arguments.length) return nodeSize ? null : size;
paulo@89:       nodeSize = (size = x) == null;
paulo@89:       return cluster;
paulo@89:     };
paulo@89:     cluster.nodeSize = function(x) {
paulo@89:       if (!arguments.length) return nodeSize ? size : null;
paulo@89:       nodeSize = (size = x) != null;
paulo@89:       return cluster;
paulo@89:     };
paulo@89:     return d3_layout_hierarchyRebind(cluster, hierarchy);
paulo@89:   };
paulo@89:   function d3_layout_clusterY(children) {
paulo@89:     return 1 + d3.max(children, function(child) {
paulo@89:       return child.y;
paulo@89:     });
paulo@89:   }
paulo@89:   function d3_layout_clusterX(children) {
paulo@89:     return children.reduce(function(x, child) {
paulo@89:       return x + child.x;
paulo@89:     }, 0) / children.length;
paulo@89:   }
paulo@89:   function d3_layout_clusterLeft(node) {
paulo@89:     var children = node.children;
paulo@89:     return children && children.length ? d3_layout_clusterLeft(children[0]) : node;
paulo@89:   }
paulo@89:   function d3_layout_clusterRight(node) {
paulo@89:     var children = node.children, n;
paulo@89:     return children && (n = children.length) ? d3_layout_clusterRight(children[n - 1]) : node;
paulo@89:   }
paulo@89:   d3.layout.treemap = function() {
paulo@89:     var hierarchy = d3.layout.hierarchy(), round = Math.round, size = [ 1, 1 ], padding = null, pad = d3_layout_treemapPadNull, sticky = false, stickies, mode = "squarify", ratio = .5 * (1 + Math.sqrt(5));
paulo@89:     function scale(children, k) {
paulo@89:       var i = -1, n = children.length, child, area;
paulo@89:       while (++i < n) {
paulo@89:         area = (child = children[i]).value * (k < 0 ? 0 : k);
paulo@89:         child.area = isNaN(area) || area <= 0 ? 0 : area;
paulo@89:       }
paulo@89:     }
paulo@89:     function squarify(node) {
paulo@89:       var children = node.children;
paulo@89:       if (children && children.length) {
paulo@89:         var rect = pad(node), row = [], remaining = children.slice(), child, best = Infinity, score, u = mode === "slice" ? rect.dx : mode === "dice" ? rect.dy : mode === "slice-dice" ? node.depth & 1 ? rect.dy : rect.dx : Math.min(rect.dx, rect.dy), n;
paulo@89:         scale(remaining, rect.dx * rect.dy / node.value);
paulo@89:         row.area = 0;
paulo@89:         while ((n = remaining.length) > 0) {
paulo@89:           row.push(child = remaining[n - 1]);
paulo@89:           row.area += child.area;
paulo@89:           if (mode !== "squarify" || (score = worst(row, u)) <= best) {
paulo@89:             remaining.pop();
paulo@89:             best = score;
paulo@89:           } else {
paulo@89:             row.area -= row.pop().area;
paulo@89:             position(row, u, rect, false);
paulo@89:             u = Math.min(rect.dx, rect.dy);
paulo@89:             row.length = row.area = 0;
paulo@89:             best = Infinity;
paulo@89:           }
paulo@89:         }
paulo@89:         if (row.length) {
paulo@89:           position(row, u, rect, true);
paulo@89:           row.length = row.area = 0;
paulo@89:         }
paulo@89:         children.forEach(squarify);
paulo@89:       }
paulo@89:     }
paulo@89:     function stickify(node) {
paulo@89:       var children = node.children;
paulo@89:       if (children && children.length) {
paulo@89:         var rect = pad(node), remaining = children.slice(), child, row = [];
paulo@89:         scale(remaining, rect.dx * rect.dy / node.value);
paulo@89:         row.area = 0;
paulo@89:         while (child = remaining.pop()) {
paulo@89:           row.push(child);
paulo@89:           row.area += child.area;
paulo@89:           if (child.z != null) {
paulo@89:             position(row, child.z ? rect.dx : rect.dy, rect, !remaining.length);
paulo@89:             row.length = row.area = 0;
paulo@89:           }
paulo@89:         }
paulo@89:         children.forEach(stickify);
paulo@89:       }
paulo@89:     }
paulo@89:     function worst(row, u) {
paulo@89:       var s = row.area, r, rmax = 0, rmin = Infinity, i = -1, n = row.length;
paulo@89:       while (++i < n) {
paulo@89:         if (!(r = row[i].area)) continue;
paulo@89:         if (r < rmin) rmin = r;
paulo@89:         if (r > rmax) rmax = r;
paulo@89:       }
paulo@89:       s *= s;
paulo@89:       u *= u;
paulo@89:       return s ? Math.max(u * rmax * ratio / s, s / (u * rmin * ratio)) : Infinity;
paulo@89:     }
paulo@89:     function position(row, u, rect, flush) {
paulo@89:       var i = -1, n = row.length, x = rect.x, y = rect.y, v = u ? round(row.area / u) : 0, o;
paulo@89:       if (u == rect.dx) {
paulo@89:         if (flush || v > rect.dy) v = rect.dy;
paulo@89:         while (++i < n) {
paulo@89:           o = row[i];
paulo@89:           o.x = x;
paulo@89:           o.y = y;
paulo@89:           o.dy = v;
paulo@89:           x += o.dx = Math.min(rect.x + rect.dx - x, v ? round(o.area / v) : 0);
paulo@89:         }
paulo@89:         o.z = true;
paulo@89:         o.dx += rect.x + rect.dx - x;
paulo@89:         rect.y += v;
paulo@89:         rect.dy -= v;
paulo@89:       } else {
paulo@89:         if (flush || v > rect.dx) v = rect.dx;
paulo@89:         while (++i < n) {
paulo@89:           o = row[i];
paulo@89:           o.x = x;
paulo@89:           o.y = y;
paulo@89:           o.dx = v;
paulo@89:           y += o.dy = Math.min(rect.y + rect.dy - y, v ? round(o.area / v) : 0);
paulo@89:         }
paulo@89:         o.z = false;
paulo@89:         o.dy += rect.y + rect.dy - y;
paulo@89:         rect.x += v;
paulo@89:         rect.dx -= v;
paulo@89:       }
paulo@89:     }
paulo@89:     function treemap(d) {
paulo@89:       var nodes = stickies || hierarchy(d), root = nodes[0];
paulo@89:       root.x = root.y = 0;
paulo@89:       if (root.value) root.dx = size[0], root.dy = size[1]; else root.dx = root.dy = 0;
paulo@89:       if (stickies) hierarchy.revalue(root);
paulo@89:       scale([ root ], root.dx * root.dy / root.value);
paulo@89:       (stickies ? stickify : squarify)(root);
paulo@89:       if (sticky) stickies = nodes;
paulo@89:       return nodes;
paulo@89:     }
paulo@89:     treemap.size = function(x) {
paulo@89:       if (!arguments.length) return size;
paulo@89:       size = x;
paulo@89:       return treemap;
paulo@89:     };
paulo@89:     treemap.padding = function(x) {
paulo@89:       if (!arguments.length) return padding;
paulo@89:       function padFunction(node) {
paulo@89:         var p = x.call(treemap, node, node.depth);
paulo@89:         return p == null ? d3_layout_treemapPadNull(node) : d3_layout_treemapPad(node, typeof p === "number" ? [ p, p, p, p ] : p);
paulo@89:       }
paulo@89:       function padConstant(node) {
paulo@89:         return d3_layout_treemapPad(node, x);
paulo@89:       }
paulo@89:       var type;
paulo@89:       pad = (padding = x) == null ? d3_layout_treemapPadNull : (type = typeof x) === "function" ? padFunction : type === "number" ? (x = [ x, x, x, x ], 
paulo@89:       padConstant) : padConstant;
paulo@89:       return treemap;
paulo@89:     };
paulo@89:     treemap.round = function(x) {
paulo@89:       if (!arguments.length) return round != Number;
paulo@89:       round = x ? Math.round : Number;
paulo@89:       return treemap;
paulo@89:     };
paulo@89:     treemap.sticky = function(x) {
paulo@89:       if (!arguments.length) return sticky;
paulo@89:       sticky = x;
paulo@89:       stickies = null;
paulo@89:       return treemap;
paulo@89:     };
paulo@89:     treemap.ratio = function(x) {
paulo@89:       if (!arguments.length) return ratio;
paulo@89:       ratio = x;
paulo@89:       return treemap;
paulo@89:     };
paulo@89:     treemap.mode = function(x) {
paulo@89:       if (!arguments.length) return mode;
paulo@89:       mode = x + "";
paulo@89:       return treemap;
paulo@89:     };
paulo@89:     return d3_layout_hierarchyRebind(treemap, hierarchy);
paulo@89:   };
paulo@89:   function d3_layout_treemapPadNull(node) {
paulo@89:     return {
paulo@89:       x: node.x,
paulo@89:       y: node.y,
paulo@89:       dx: node.dx,
paulo@89:       dy: node.dy
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_layout_treemapPad(node, padding) {
paulo@89:     var x = node.x + padding[3], y = node.y + padding[0], dx = node.dx - padding[1] - padding[3], dy = node.dy - padding[0] - padding[2];
paulo@89:     if (dx < 0) {
paulo@89:       x += dx / 2;
paulo@89:       dx = 0;
paulo@89:     }
paulo@89:     if (dy < 0) {
paulo@89:       y += dy / 2;
paulo@89:       dy = 0;
paulo@89:     }
paulo@89:     return {
paulo@89:       x: x,
paulo@89:       y: y,
paulo@89:       dx: dx,
paulo@89:       dy: dy
paulo@89:     };
paulo@89:   }
paulo@89:   d3.random = {
paulo@89:     normal: function(µ, σ) {
paulo@89:       var n = arguments.length;
paulo@89:       if (n < 2) σ = 1;
paulo@89:       if (n < 1) µ = 0;
paulo@89:       return function() {
paulo@89:         var x, y, r;
paulo@89:         do {
paulo@89:           x = Math.random() * 2 - 1;
paulo@89:           y = Math.random() * 2 - 1;
paulo@89:           r = x * x + y * y;
paulo@89:         } while (!r || r > 1);
paulo@89:         return µ + σ * x * Math.sqrt(-2 * Math.log(r) / r);
paulo@89:       };
paulo@89:     },
paulo@89:     logNormal: function() {
paulo@89:       var random = d3.random.normal.apply(d3, arguments);
paulo@89:       return function() {
paulo@89:         return Math.exp(random());
paulo@89:       };
paulo@89:     },
paulo@89:     bates: function(m) {
paulo@89:       var random = d3.random.irwinHall(m);
paulo@89:       return function() {
paulo@89:         return random() / m;
paulo@89:       };
paulo@89:     },
paulo@89:     irwinHall: function(m) {
paulo@89:       return function() {
paulo@89:         for (var s = 0, j = 0; j < m; j++) s += Math.random();
paulo@89:         return s;
paulo@89:       };
paulo@89:     }
paulo@89:   };
paulo@89:   d3.scale = {};
paulo@89:   function d3_scaleExtent(domain) {
paulo@89:     var start = domain[0], stop = domain[domain.length - 1];
paulo@89:     return start < stop ? [ start, stop ] : [ stop, start ];
paulo@89:   }
paulo@89:   function d3_scaleRange(scale) {
paulo@89:     return scale.rangeExtent ? scale.rangeExtent() : d3_scaleExtent(scale.range());
paulo@89:   }
paulo@89:   function d3_scale_bilinear(domain, range, uninterpolate, interpolate) {
paulo@89:     var u = uninterpolate(domain[0], domain[1]), i = interpolate(range[0], range[1]);
paulo@89:     return function(x) {
paulo@89:       return i(u(x));
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_scale_nice(domain, nice) {
paulo@89:     var i0 = 0, i1 = domain.length - 1, x0 = domain[i0], x1 = domain[i1], dx;
paulo@89:     if (x1 < x0) {
paulo@89:       dx = i0, i0 = i1, i1 = dx;
paulo@89:       dx = x0, x0 = x1, x1 = dx;
paulo@89:     }
paulo@89:     domain[i0] = nice.floor(x0);
paulo@89:     domain[i1] = nice.ceil(x1);
paulo@89:     return domain;
paulo@89:   }
paulo@89:   function d3_scale_niceStep(step) {
paulo@89:     return step ? {
paulo@89:       floor: function(x) {
paulo@89:         return Math.floor(x / step) * step;
paulo@89:       },
paulo@89:       ceil: function(x) {
paulo@89:         return Math.ceil(x / step) * step;
paulo@89:       }
paulo@89:     } : d3_scale_niceIdentity;
paulo@89:   }
paulo@89:   var d3_scale_niceIdentity = {
paulo@89:     floor: d3_identity,
paulo@89:     ceil: d3_identity
paulo@89:   };
paulo@89:   function d3_scale_polylinear(domain, range, uninterpolate, interpolate) {
paulo@89:     var u = [], i = [], j = 0, k = Math.min(domain.length, range.length) - 1;
paulo@89:     if (domain[k] < domain[0]) {
paulo@89:       domain = domain.slice().reverse();
paulo@89:       range = range.slice().reverse();
paulo@89:     }
paulo@89:     while (++j <= k) {
paulo@89:       u.push(uninterpolate(domain[j - 1], domain[j]));
paulo@89:       i.push(interpolate(range[j - 1], range[j]));
paulo@89:     }
paulo@89:     return function(x) {
paulo@89:       var j = d3.bisect(domain, x, 1, k) - 1;
paulo@89:       return i[j](u[j](x));
paulo@89:     };
paulo@89:   }
paulo@89:   d3.scale.linear = function() {
paulo@89:     return d3_scale_linear([ 0, 1 ], [ 0, 1 ], d3_interpolate, false);
paulo@89:   };
paulo@89:   function d3_scale_linear(domain, range, interpolate, clamp) {
paulo@89:     var output, input;
paulo@89:     function rescale() {
paulo@89:       var linear = Math.min(domain.length, range.length) > 2 ? d3_scale_polylinear : d3_scale_bilinear, uninterpolate = clamp ? d3_uninterpolateClamp : d3_uninterpolateNumber;
paulo@89:       output = linear(domain, range, uninterpolate, interpolate);
paulo@89:       input = linear(range, domain, uninterpolate, d3_interpolate);
paulo@89:       return scale;
paulo@89:     }
paulo@89:     function scale(x) {
paulo@89:       return output(x);
paulo@89:     }
paulo@89:     scale.invert = function(y) {
paulo@89:       return input(y);
paulo@89:     };
paulo@89:     scale.domain = function(x) {
paulo@89:       if (!arguments.length) return domain;
paulo@89:       domain = x.map(Number);
paulo@89:       return rescale();
paulo@89:     };
paulo@89:     scale.range = function(x) {
paulo@89:       if (!arguments.length) return range;
paulo@89:       range = x;
paulo@89:       return rescale();
paulo@89:     };
paulo@89:     scale.rangeRound = function(x) {
paulo@89:       return scale.range(x).interpolate(d3_interpolateRound);
paulo@89:     };
paulo@89:     scale.clamp = function(x) {
paulo@89:       if (!arguments.length) return clamp;
paulo@89:       clamp = x;
paulo@89:       return rescale();
paulo@89:     };
paulo@89:     scale.interpolate = function(x) {
paulo@89:       if (!arguments.length) return interpolate;
paulo@89:       interpolate = x;
paulo@89:       return rescale();
paulo@89:     };
paulo@89:     scale.ticks = function(m) {
paulo@89:       return d3_scale_linearTicks(domain, m);
paulo@89:     };
paulo@89:     scale.tickFormat = function(m, format) {
paulo@89:       return d3_scale_linearTickFormat(domain, m, format);
paulo@89:     };
paulo@89:     scale.nice = function(m) {
paulo@89:       d3_scale_linearNice(domain, m);
paulo@89:       return rescale();
paulo@89:     };
paulo@89:     scale.copy = function() {
paulo@89:       return d3_scale_linear(domain, range, interpolate, clamp);
paulo@89:     };
paulo@89:     return rescale();
paulo@89:   }
paulo@89:   function d3_scale_linearRebind(scale, linear) {
paulo@89:     return d3.rebind(scale, linear, "range", "rangeRound", "interpolate", "clamp");
paulo@89:   }
paulo@89:   function d3_scale_linearNice(domain, m) {
paulo@89:     d3_scale_nice(domain, d3_scale_niceStep(d3_scale_linearTickRange(domain, m)[2]));
paulo@89:     d3_scale_nice(domain, d3_scale_niceStep(d3_scale_linearTickRange(domain, m)[2]));
paulo@89:     return domain;
paulo@89:   }
paulo@89:   function d3_scale_linearTickRange(domain, m) {
paulo@89:     if (m == null) m = 10;
paulo@89:     var extent = d3_scaleExtent(domain), span = extent[1] - extent[0], step = Math.pow(10, Math.floor(Math.log(span / m) / Math.LN10)), err = m / span * step;
paulo@89:     if (err <= .15) step *= 10; else if (err <= .35) step *= 5; else if (err <= .75) step *= 2;
paulo@89:     extent[0] = Math.ceil(extent[0] / step) * step;
paulo@89:     extent[1] = Math.floor(extent[1] / step) * step + step * .5;
paulo@89:     extent[2] = step;
paulo@89:     return extent;
paulo@89:   }
paulo@89:   function d3_scale_linearTicks(domain, m) {
paulo@89:     return d3.range.apply(d3, d3_scale_linearTickRange(domain, m));
paulo@89:   }
paulo@89:   function d3_scale_linearTickFormat(domain, m, format) {
paulo@89:     var range = d3_scale_linearTickRange(domain, m);
paulo@89:     if (format) {
paulo@89:       var match = d3_format_re.exec(format);
paulo@89:       match.shift();
paulo@89:       if (match[8] === "s") {
paulo@89:         var prefix = d3.formatPrefix(Math.max(abs(range[0]), abs(range[1])));
paulo@89:         if (!match[7]) match[7] = "." + d3_scale_linearPrecision(prefix.scale(range[2]));
paulo@89:         match[8] = "f";
paulo@89:         format = d3.format(match.join(""));
paulo@89:         return function(d) {
paulo@89:           return format(prefix.scale(d)) + prefix.symbol;
paulo@89:         };
paulo@89:       }
paulo@89:       if (!match[7]) match[7] = "." + d3_scale_linearFormatPrecision(match[8], range);
paulo@89:       format = match.join("");
paulo@89:     } else {
paulo@89:       format = ",." + d3_scale_linearPrecision(range[2]) + "f";
paulo@89:     }
paulo@89:     return d3.format(format);
paulo@89:   }
paulo@89:   var d3_scale_linearFormatSignificant = {
paulo@89:     s: 1,
paulo@89:     g: 1,
paulo@89:     p: 1,
paulo@89:     r: 1,
paulo@89:     e: 1
paulo@89:   };
paulo@89:   function d3_scale_linearPrecision(value) {
paulo@89:     return -Math.floor(Math.log(value) / Math.LN10 + .01);
paulo@89:   }
paulo@89:   function d3_scale_linearFormatPrecision(type, range) {
paulo@89:     var p = d3_scale_linearPrecision(range[2]);
paulo@89:     return type in d3_scale_linearFormatSignificant ? Math.abs(p - d3_scale_linearPrecision(Math.max(abs(range[0]), abs(range[1])))) + +(type !== "e") : p - (type === "%") * 2;
paulo@89:   }
paulo@89:   d3.scale.log = function() {
paulo@89:     return d3_scale_log(d3.scale.linear().domain([ 0, 1 ]), 10, true, [ 1, 10 ]);
paulo@89:   };
paulo@89:   function d3_scale_log(linear, base, positive, domain) {
paulo@89:     function log(x) {
paulo@89:       return (positive ? Math.log(x < 0 ? 0 : x) : -Math.log(x > 0 ? 0 : -x)) / Math.log(base);
paulo@89:     }
paulo@89:     function pow(x) {
paulo@89:       return positive ? Math.pow(base, x) : -Math.pow(base, -x);
paulo@89:     }
paulo@89:     function scale(x) {
paulo@89:       return linear(log(x));
paulo@89:     }
paulo@89:     scale.invert = function(x) {
paulo@89:       return pow(linear.invert(x));
paulo@89:     };
paulo@89:     scale.domain = function(x) {
paulo@89:       if (!arguments.length) return domain;
paulo@89:       positive = x[0] >= 0;
paulo@89:       linear.domain((domain = x.map(Number)).map(log));
paulo@89:       return scale;
paulo@89:     };
paulo@89:     scale.base = function(_) {
paulo@89:       if (!arguments.length) return base;
paulo@89:       base = +_;
paulo@89:       linear.domain(domain.map(log));
paulo@89:       return scale;
paulo@89:     };
paulo@89:     scale.nice = function() {
paulo@89:       var niced = d3_scale_nice(domain.map(log), positive ? Math : d3_scale_logNiceNegative);
paulo@89:       linear.domain(niced);
paulo@89:       domain = niced.map(pow);
paulo@89:       return scale;
paulo@89:     };
paulo@89:     scale.ticks = function() {
paulo@89:       var extent = d3_scaleExtent(domain), ticks = [], u = extent[0], v = extent[1], i = Math.floor(log(u)), j = Math.ceil(log(v)), n = base % 1 ? 2 : base;
paulo@89:       if (isFinite(j - i)) {
paulo@89:         if (positive) {
paulo@89:           for (;i < j; i++) for (var k = 1; k < n; k++) ticks.push(pow(i) * k);
paulo@89:           ticks.push(pow(i));
paulo@89:         } else {
paulo@89:           ticks.push(pow(i));
paulo@89:           for (;i++ < j; ) for (var k = n - 1; k > 0; k--) ticks.push(pow(i) * k);
paulo@89:         }
paulo@89:         for (i = 0; ticks[i] < u; i++) {}
paulo@89:         for (j = ticks.length; ticks[j - 1] > v; j--) {}
paulo@89:         ticks = ticks.slice(i, j);
paulo@89:       }
paulo@89:       return ticks;
paulo@89:     };
paulo@89:     scale.tickFormat = function(n, format) {
paulo@89:       if (!arguments.length) return d3_scale_logFormat;
paulo@89:       if (arguments.length < 2) format = d3_scale_logFormat; else if (typeof format !== "function") format = d3.format(format);
paulo@89:       var k = Math.max(1, base * n / scale.ticks().length);
paulo@89:       return function(d) {
paulo@89:         var i = d / pow(Math.round(log(d)));
paulo@89:         if (i * base < base - .5) i *= base;
paulo@89:         return i <= k ? format(d) : "";
paulo@89:       };
paulo@89:     };
paulo@89:     scale.copy = function() {
paulo@89:       return d3_scale_log(linear.copy(), base, positive, domain);
paulo@89:     };
paulo@89:     return d3_scale_linearRebind(scale, linear);
paulo@89:   }
paulo@89:   var d3_scale_logFormat = d3.format(".0e"), d3_scale_logNiceNegative = {
paulo@89:     floor: function(x) {
paulo@89:       return -Math.ceil(-x);
paulo@89:     },
paulo@89:     ceil: function(x) {
paulo@89:       return -Math.floor(-x);
paulo@89:     }
paulo@89:   };
paulo@89:   d3.scale.pow = function() {
paulo@89:     return d3_scale_pow(d3.scale.linear(), 1, [ 0, 1 ]);
paulo@89:   };
paulo@89:   function d3_scale_pow(linear, exponent, domain) {
paulo@89:     var powp = d3_scale_powPow(exponent), powb = d3_scale_powPow(1 / exponent);
paulo@89:     function scale(x) {
paulo@89:       return linear(powp(x));
paulo@89:     }
paulo@89:     scale.invert = function(x) {
paulo@89:       return powb(linear.invert(x));
paulo@89:     };
paulo@89:     scale.domain = function(x) {
paulo@89:       if (!arguments.length) return domain;
paulo@89:       linear.domain((domain = x.map(Number)).map(powp));
paulo@89:       return scale;
paulo@89:     };
paulo@89:     scale.ticks = function(m) {
paulo@89:       return d3_scale_linearTicks(domain, m);
paulo@89:     };
paulo@89:     scale.tickFormat = function(m, format) {
paulo@89:       return d3_scale_linearTickFormat(domain, m, format);
paulo@89:     };
paulo@89:     scale.nice = function(m) {
paulo@89:       return scale.domain(d3_scale_linearNice(domain, m));
paulo@89:     };
paulo@89:     scale.exponent = function(x) {
paulo@89:       if (!arguments.length) return exponent;
paulo@89:       powp = d3_scale_powPow(exponent = x);
paulo@89:       powb = d3_scale_powPow(1 / exponent);
paulo@89:       linear.domain(domain.map(powp));
paulo@89:       return scale;
paulo@89:     };
paulo@89:     scale.copy = function() {
paulo@89:       return d3_scale_pow(linear.copy(), exponent, domain);
paulo@89:     };
paulo@89:     return d3_scale_linearRebind(scale, linear);
paulo@89:   }
paulo@89:   function d3_scale_powPow(e) {
paulo@89:     return function(x) {
paulo@89:       return x < 0 ? -Math.pow(-x, e) : Math.pow(x, e);
paulo@89:     };
paulo@89:   }
paulo@89:   d3.scale.sqrt = function() {
paulo@89:     return d3.scale.pow().exponent(.5);
paulo@89:   };
paulo@89:   d3.scale.ordinal = function() {
paulo@89:     return d3_scale_ordinal([], {
paulo@89:       t: "range",
paulo@89:       a: [ [] ]
paulo@89:     });
paulo@89:   };
paulo@89:   function d3_scale_ordinal(domain, ranger) {
paulo@89:     var index, range, rangeBand;
paulo@89:     function scale(x) {
paulo@89:       return range[((index.get(x) || (ranger.t === "range" ? index.set(x, domain.push(x)) : NaN)) - 1) % range.length];
paulo@89:     }
paulo@89:     function steps(start, step) {
paulo@89:       return d3.range(domain.length).map(function(i) {
paulo@89:         return start + step * i;
paulo@89:       });
paulo@89:     }
paulo@89:     scale.domain = function(x) {
paulo@89:       if (!arguments.length) return domain;
paulo@89:       domain = [];
paulo@89:       index = new d3_Map();
paulo@89:       var i = -1, n = x.length, xi;
paulo@89:       while (++i < n) if (!index.has(xi = x[i])) index.set(xi, domain.push(xi));
paulo@89:       return scale[ranger.t].apply(scale, ranger.a);
paulo@89:     };
paulo@89:     scale.range = function(x) {
paulo@89:       if (!arguments.length) return range;
paulo@89:       range = x;
paulo@89:       rangeBand = 0;
paulo@89:       ranger = {
paulo@89:         t: "range",
paulo@89:         a: arguments
paulo@89:       };
paulo@89:       return scale;
paulo@89:     };
paulo@89:     scale.rangePoints = function(x, padding) {
paulo@89:       if (arguments.length < 2) padding = 0;
paulo@89:       var start = x[0], stop = x[1], step = domain.length < 2 ? (start = (start + stop) / 2, 
paulo@89:       0) : (stop - start) / (domain.length - 1 + padding);
paulo@89:       range = steps(start + step * padding / 2, step);
paulo@89:       rangeBand = 0;
paulo@89:       ranger = {
paulo@89:         t: "rangePoints",
paulo@89:         a: arguments
paulo@89:       };
paulo@89:       return scale;
paulo@89:     };
paulo@89:     scale.rangeRoundPoints = function(x, padding) {
paulo@89:       if (arguments.length < 2) padding = 0;
paulo@89:       var start = x[0], stop = x[1], step = domain.length < 2 ? (start = stop = Math.round((start + stop) / 2), 
paulo@89:       0) : (stop - start) / (domain.length - 1 + padding) | 0;
paulo@89:       range = steps(start + Math.round(step * padding / 2 + (stop - start - (domain.length - 1 + padding) * step) / 2), step);
paulo@89:       rangeBand = 0;
paulo@89:       ranger = {
paulo@89:         t: "rangeRoundPoints",
paulo@89:         a: arguments
paulo@89:       };
paulo@89:       return scale;
paulo@89:     };
paulo@89:     scale.rangeBands = function(x, padding, outerPadding) {
paulo@89:       if (arguments.length < 2) padding = 0;
paulo@89:       if (arguments.length < 3) outerPadding = padding;
paulo@89:       var reverse = x[1] < x[0], start = x[reverse - 0], stop = x[1 - reverse], step = (stop - start) / (domain.length - padding + 2 * outerPadding);
paulo@89:       range = steps(start + step * outerPadding, step);
paulo@89:       if (reverse) range.reverse();
paulo@89:       rangeBand = step * (1 - padding);
paulo@89:       ranger = {
paulo@89:         t: "rangeBands",
paulo@89:         a: arguments
paulo@89:       };
paulo@89:       return scale;
paulo@89:     };
paulo@89:     scale.rangeRoundBands = function(x, padding, outerPadding) {
paulo@89:       if (arguments.length < 2) padding = 0;
paulo@89:       if (arguments.length < 3) outerPadding = padding;
paulo@89:       var reverse = x[1] < x[0], start = x[reverse - 0], stop = x[1 - reverse], step = Math.floor((stop - start) / (domain.length - padding + 2 * outerPadding));
paulo@89:       range = steps(start + Math.round((stop - start - (domain.length - padding) * step) / 2), step);
paulo@89:       if (reverse) range.reverse();
paulo@89:       rangeBand = Math.round(step * (1 - padding));
paulo@89:       ranger = {
paulo@89:         t: "rangeRoundBands",
paulo@89:         a: arguments
paulo@89:       };
paulo@89:       return scale;
paulo@89:     };
paulo@89:     scale.rangeBand = function() {
paulo@89:       return rangeBand;
paulo@89:     };
paulo@89:     scale.rangeExtent = function() {
paulo@89:       return d3_scaleExtent(ranger.a[0]);
paulo@89:     };
paulo@89:     scale.copy = function() {
paulo@89:       return d3_scale_ordinal(domain, ranger);
paulo@89:     };
paulo@89:     return scale.domain(domain);
paulo@89:   }
paulo@89:   d3.scale.category10 = function() {
paulo@89:     return d3.scale.ordinal().range(d3_category10);
paulo@89:   };
paulo@89:   d3.scale.category20 = function() {
paulo@89:     return d3.scale.ordinal().range(d3_category20);
paulo@89:   };
paulo@89:   d3.scale.category20b = function() {
paulo@89:     return d3.scale.ordinal().range(d3_category20b);
paulo@89:   };
paulo@89:   d3.scale.category20c = function() {
paulo@89:     return d3.scale.ordinal().range(d3_category20c);
paulo@89:   };
paulo@89:   var d3_category10 = [ 2062260, 16744206, 2924588, 14034728, 9725885, 9197131, 14907330, 8355711, 12369186, 1556175 ].map(d3_rgbString);
paulo@89:   var d3_category20 = [ 2062260, 11454440, 16744206, 16759672, 2924588, 10018698, 14034728, 16750742, 9725885, 12955861, 9197131, 12885140, 14907330, 16234194, 8355711, 13092807, 12369186, 14408589, 1556175, 10410725 ].map(d3_rgbString);
paulo@89:   var d3_category20b = [ 3750777, 5395619, 7040719, 10264286, 6519097, 9216594, 11915115, 13556636, 9202993, 12426809, 15186514, 15190932, 8666169, 11356490, 14049643, 15177372, 8077683, 10834324, 13528509, 14589654 ].map(d3_rgbString);
paulo@89:   var d3_category20c = [ 3244733, 7057110, 10406625, 13032431, 15095053, 16616764, 16625259, 16634018, 3253076, 7652470, 10607003, 13101504, 7695281, 10394312, 12369372, 14342891, 6513507, 9868950, 12434877, 14277081 ].map(d3_rgbString);
paulo@89:   d3.scale.quantile = function() {
paulo@89:     return d3_scale_quantile([], []);
paulo@89:   };
paulo@89:   function d3_scale_quantile(domain, range) {
paulo@89:     var thresholds;
paulo@89:     function rescale() {
paulo@89:       var k = 0, q = range.length;
paulo@89:       thresholds = [];
paulo@89:       while (++k < q) thresholds[k - 1] = d3.quantile(domain, k / q);
paulo@89:       return scale;
paulo@89:     }
paulo@89:     function scale(x) {
paulo@89:       if (!isNaN(x = +x)) return range[d3.bisect(thresholds, x)];
paulo@89:     }
paulo@89:     scale.domain = function(x) {
paulo@89:       if (!arguments.length) return domain;
paulo@89:       domain = x.map(d3_number).filter(d3_numeric).sort(d3_ascending);
paulo@89:       return rescale();
paulo@89:     };
paulo@89:     scale.range = function(x) {
paulo@89:       if (!arguments.length) return range;
paulo@89:       range = x;
paulo@89:       return rescale();
paulo@89:     };
paulo@89:     scale.quantiles = function() {
paulo@89:       return thresholds;
paulo@89:     };
paulo@89:     scale.invertExtent = function(y) {
paulo@89:       y = range.indexOf(y);
paulo@89:       return y < 0 ? [ NaN, NaN ] : [ y > 0 ? thresholds[y - 1] : domain[0], y < thresholds.length ? thresholds[y] : domain[domain.length - 1] ];
paulo@89:     };
paulo@89:     scale.copy = function() {
paulo@89:       return d3_scale_quantile(domain, range);
paulo@89:     };
paulo@89:     return rescale();
paulo@89:   }
paulo@89:   d3.scale.quantize = function() {
paulo@89:     return d3_scale_quantize(0, 1, [ 0, 1 ]);
paulo@89:   };
paulo@89:   function d3_scale_quantize(x0, x1, range) {
paulo@89:     var kx, i;
paulo@89:     function scale(x) {
paulo@89:       return range[Math.max(0, Math.min(i, Math.floor(kx * (x - x0))))];
paulo@89:     }
paulo@89:     function rescale() {
paulo@89:       kx = range.length / (x1 - x0);
paulo@89:       i = range.length - 1;
paulo@89:       return scale;
paulo@89:     }
paulo@89:     scale.domain = function(x) {
paulo@89:       if (!arguments.length) return [ x0, x1 ];
paulo@89:       x0 = +x[0];
paulo@89:       x1 = +x[x.length - 1];
paulo@89:       return rescale();
paulo@89:     };
paulo@89:     scale.range = function(x) {
paulo@89:       if (!arguments.length) return range;
paulo@89:       range = x;
paulo@89:       return rescale();
paulo@89:     };
paulo@89:     scale.invertExtent = function(y) {
paulo@89:       y = range.indexOf(y);
paulo@89:       y = y < 0 ? NaN : y / kx + x0;
paulo@89:       return [ y, y + 1 / kx ];
paulo@89:     };
paulo@89:     scale.copy = function() {
paulo@89:       return d3_scale_quantize(x0, x1, range);
paulo@89:     };
paulo@89:     return rescale();
paulo@89:   }
paulo@89:   d3.scale.threshold = function() {
paulo@89:     return d3_scale_threshold([ .5 ], [ 0, 1 ]);
paulo@89:   };
paulo@89:   function d3_scale_threshold(domain, range) {
paulo@89:     function scale(x) {
paulo@89:       if (x <= x) return range[d3.bisect(domain, x)];
paulo@89:     }
paulo@89:     scale.domain = function(_) {
paulo@89:       if (!arguments.length) return domain;
paulo@89:       domain = _;
paulo@89:       return scale;
paulo@89:     };
paulo@89:     scale.range = function(_) {
paulo@89:       if (!arguments.length) return range;
paulo@89:       range = _;
paulo@89:       return scale;
paulo@89:     };
paulo@89:     scale.invertExtent = function(y) {
paulo@89:       y = range.indexOf(y);
paulo@89:       return [ domain[y - 1], domain[y] ];
paulo@89:     };
paulo@89:     scale.copy = function() {
paulo@89:       return d3_scale_threshold(domain, range);
paulo@89:     };
paulo@89:     return scale;
paulo@89:   }
paulo@89:   d3.scale.identity = function() {
paulo@89:     return d3_scale_identity([ 0, 1 ]);
paulo@89:   };
paulo@89:   function d3_scale_identity(domain) {
paulo@89:     function identity(x) {
paulo@89:       return +x;
paulo@89:     }
paulo@89:     identity.invert = identity;
paulo@89:     identity.domain = identity.range = function(x) {
paulo@89:       if (!arguments.length) return domain;
paulo@89:       domain = x.map(identity);
paulo@89:       return identity;
paulo@89:     };
paulo@89:     identity.ticks = function(m) {
paulo@89:       return d3_scale_linearTicks(domain, m);
paulo@89:     };
paulo@89:     identity.tickFormat = function(m, format) {
paulo@89:       return d3_scale_linearTickFormat(domain, m, format);
paulo@89:     };
paulo@89:     identity.copy = function() {
paulo@89:       return d3_scale_identity(domain);
paulo@89:     };
paulo@89:     return identity;
paulo@89:   }
paulo@89:   d3.svg = {};
paulo@89:   function d3_zero() {
paulo@89:     return 0;
paulo@89:   }
paulo@89:   d3.svg.arc = function() {
paulo@89:     var innerRadius = d3_svg_arcInnerRadius, outerRadius = d3_svg_arcOuterRadius, cornerRadius = d3_zero, padRadius = d3_svg_arcAuto, startAngle = d3_svg_arcStartAngle, endAngle = d3_svg_arcEndAngle, padAngle = d3_svg_arcPadAngle;
paulo@89:     function arc() {
paulo@89:       var r0 = Math.max(0, +innerRadius.apply(this, arguments)), r1 = Math.max(0, +outerRadius.apply(this, arguments)), a0 = startAngle.apply(this, arguments) - halfπ, a1 = endAngle.apply(this, arguments) - halfπ, da = Math.abs(a1 - a0), cw = a0 > a1 ? 0 : 1;
paulo@89:       if (r1 < r0) rc = r1, r1 = r0, r0 = rc;
paulo@89:       if (da >= τε) return circleSegment(r1, cw) + (r0 ? circleSegment(r0, 1 - cw) : "") + "Z";
paulo@89:       var rc, cr, rp, ap, p0 = 0, p1 = 0, x0, y0, x1, y1, x2, y2, x3, y3, path = [];
paulo@89:       if (ap = (+padAngle.apply(this, arguments) || 0) / 2) {
paulo@89:         rp = padRadius === d3_svg_arcAuto ? Math.sqrt(r0 * r0 + r1 * r1) : +padRadius.apply(this, arguments);
paulo@89:         if (!cw) p1 *= -1;
paulo@89:         if (r1) p1 = d3_asin(rp / r1 * Math.sin(ap));
paulo@89:         if (r0) p0 = d3_asin(rp / r0 * Math.sin(ap));
paulo@89:       }
paulo@89:       if (r1) {
paulo@89:         x0 = r1 * Math.cos(a0 + p1);
paulo@89:         y0 = r1 * Math.sin(a0 + p1);
paulo@89:         x1 = r1 * Math.cos(a1 - p1);
paulo@89:         y1 = r1 * Math.sin(a1 - p1);
paulo@89:         var l1 = Math.abs(a1 - a0 - 2 * p1) <= π ? 0 : 1;
paulo@89:         if (p1 && d3_svg_arcSweep(x0, y0, x1, y1) === cw ^ l1) {
paulo@89:           var h1 = (a0 + a1) / 2;
paulo@89:           x0 = r1 * Math.cos(h1);
paulo@89:           y0 = r1 * Math.sin(h1);
paulo@89:           x1 = y1 = null;
paulo@89:         }
paulo@89:       } else {
paulo@89:         x0 = y0 = 0;
paulo@89:       }
paulo@89:       if (r0) {
paulo@89:         x2 = r0 * Math.cos(a1 - p0);
paulo@89:         y2 = r0 * Math.sin(a1 - p0);
paulo@89:         x3 = r0 * Math.cos(a0 + p0);
paulo@89:         y3 = r0 * Math.sin(a0 + p0);
paulo@89:         var l0 = Math.abs(a0 - a1 + 2 * p0) <= π ? 0 : 1;
paulo@89:         if (p0 && d3_svg_arcSweep(x2, y2, x3, y3) === 1 - cw ^ l0) {
paulo@89:           var h0 = (a0 + a1) / 2;
paulo@89:           x2 = r0 * Math.cos(h0);
paulo@89:           y2 = r0 * Math.sin(h0);
paulo@89:           x3 = y3 = null;
paulo@89:         }
paulo@89:       } else {
paulo@89:         x2 = y2 = 0;
paulo@89:       }
paulo@89:       if (da > ε && (rc = Math.min(Math.abs(r1 - r0) / 2, +cornerRadius.apply(this, arguments))) > .001) {
paulo@89:         cr = r0 < r1 ^ cw ? 0 : 1;
paulo@89:         var rc1 = rc, rc0 = rc;
paulo@89:         if (da < π) {
paulo@89:           var oc = x3 == null ? [ x2, y2 ] : x1 == null ? [ x0, y0 ] : d3_geom_polygonIntersect([ x0, y0 ], [ x3, y3 ], [ x1, y1 ], [ x2, y2 ]), ax = x0 - oc[0], ay = y0 - oc[1], bx = x1 - oc[0], by = y1 - oc[1], kc = 1 / Math.sin(Math.acos((ax * bx + ay * by) / (Math.sqrt(ax * ax + ay * ay) * Math.sqrt(bx * bx + by * by))) / 2), lc = Math.sqrt(oc[0] * oc[0] + oc[1] * oc[1]);
paulo@89:           rc0 = Math.min(rc, (r0 - lc) / (kc - 1));
paulo@89:           rc1 = Math.min(rc, (r1 - lc) / (kc + 1));
paulo@89:         }
paulo@89:         if (x1 != null) {
paulo@89:           var t30 = d3_svg_arcCornerTangents(x3 == null ? [ x2, y2 ] : [ x3, y3 ], [ x0, y0 ], r1, rc1, cw), t12 = d3_svg_arcCornerTangents([ x1, y1 ], [ x2, y2 ], r1, rc1, cw);
paulo@89:           if (rc === rc1) {
paulo@89:             path.push("M", t30[0], "A", rc1, ",", rc1, " 0 0,", cr, " ", t30[1], "A", r1, ",", r1, " 0 ", 1 - cw ^ d3_svg_arcSweep(t30[1][0], t30[1][1], t12[1][0], t12[1][1]), ",", cw, " ", t12[1], "A", rc1, ",", rc1, " 0 0,", cr, " ", t12[0]);
paulo@89:           } else {
paulo@89:             path.push("M", t30[0], "A", rc1, ",", rc1, " 0 1,", cr, " ", t12[0]);
paulo@89:           }
paulo@89:         } else {
paulo@89:           path.push("M", x0, ",", y0);
paulo@89:         }
paulo@89:         if (x3 != null) {
paulo@89:           var t03 = d3_svg_arcCornerTangents([ x0, y0 ], [ x3, y3 ], r0, -rc0, cw), t21 = d3_svg_arcCornerTangents([ x2, y2 ], x1 == null ? [ x0, y0 ] : [ x1, y1 ], r0, -rc0, cw);
paulo@89:           if (rc === rc0) {
paulo@89:             path.push("L", t21[0], "A", rc0, ",", rc0, " 0 0,", cr, " ", t21[1], "A", r0, ",", r0, " 0 ", cw ^ d3_svg_arcSweep(t21[1][0], t21[1][1], t03[1][0], t03[1][1]), ",", 1 - cw, " ", t03[1], "A", rc0, ",", rc0, " 0 0,", cr, " ", t03[0]);
paulo@89:           } else {
paulo@89:             path.push("L", t21[0], "A", rc0, ",", rc0, " 0 0,", cr, " ", t03[0]);
paulo@89:           }
paulo@89:         } else {
paulo@89:           path.push("L", x2, ",", y2);
paulo@89:         }
paulo@89:       } else {
paulo@89:         path.push("M", x0, ",", y0);
paulo@89:         if (x1 != null) path.push("A", r1, ",", r1, " 0 ", l1, ",", cw, " ", x1, ",", y1);
paulo@89:         path.push("L", x2, ",", y2);
paulo@89:         if (x3 != null) path.push("A", r0, ",", r0, " 0 ", l0, ",", 1 - cw, " ", x3, ",", y3);
paulo@89:       }
paulo@89:       path.push("Z");
paulo@89:       return path.join("");
paulo@89:     }
paulo@89:     function circleSegment(r1, cw) {
paulo@89:       return "M0," + r1 + "A" + r1 + "," + r1 + " 0 1," + cw + " 0," + -r1 + "A" + r1 + "," + r1 + " 0 1," + cw + " 0," + r1;
paulo@89:     }
paulo@89:     arc.innerRadius = function(v) {
paulo@89:       if (!arguments.length) return innerRadius;
paulo@89:       innerRadius = d3_functor(v);
paulo@89:       return arc;
paulo@89:     };
paulo@89:     arc.outerRadius = function(v) {
paulo@89:       if (!arguments.length) return outerRadius;
paulo@89:       outerRadius = d3_functor(v);
paulo@89:       return arc;
paulo@89:     };
paulo@89:     arc.cornerRadius = function(v) {
paulo@89:       if (!arguments.length) return cornerRadius;
paulo@89:       cornerRadius = d3_functor(v);
paulo@89:       return arc;
paulo@89:     };
paulo@89:     arc.padRadius = function(v) {
paulo@89:       if (!arguments.length) return padRadius;
paulo@89:       padRadius = v == d3_svg_arcAuto ? d3_svg_arcAuto : d3_functor(v);
paulo@89:       return arc;
paulo@89:     };
paulo@89:     arc.startAngle = function(v) {
paulo@89:       if (!arguments.length) return startAngle;
paulo@89:       startAngle = d3_functor(v);
paulo@89:       return arc;
paulo@89:     };
paulo@89:     arc.endAngle = function(v) {
paulo@89:       if (!arguments.length) return endAngle;
paulo@89:       endAngle = d3_functor(v);
paulo@89:       return arc;
paulo@89:     };
paulo@89:     arc.padAngle = function(v) {
paulo@89:       if (!arguments.length) return padAngle;
paulo@89:       padAngle = d3_functor(v);
paulo@89:       return arc;
paulo@89:     };
paulo@89:     arc.centroid = function() {
paulo@89:       var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2, a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - halfπ;
paulo@89:       return [ Math.cos(a) * r, Math.sin(a) * r ];
paulo@89:     };
paulo@89:     return arc;
paulo@89:   };
paulo@89:   var d3_svg_arcAuto = "auto";
paulo@89:   function d3_svg_arcInnerRadius(d) {
paulo@89:     return d.innerRadius;
paulo@89:   }
paulo@89:   function d3_svg_arcOuterRadius(d) {
paulo@89:     return d.outerRadius;
paulo@89:   }
paulo@89:   function d3_svg_arcStartAngle(d) {
paulo@89:     return d.startAngle;
paulo@89:   }
paulo@89:   function d3_svg_arcEndAngle(d) {
paulo@89:     return d.endAngle;
paulo@89:   }
paulo@89:   function d3_svg_arcPadAngle(d) {
paulo@89:     return d && d.padAngle;
paulo@89:   }
paulo@89:   function d3_svg_arcSweep(x0, y0, x1, y1) {
paulo@89:     return (x0 - x1) * y0 - (y0 - y1) * x0 > 0 ? 0 : 1;
paulo@89:   }
paulo@89:   function d3_svg_arcCornerTangents(p0, p1, r1, rc, cw) {
paulo@89:     var x01 = p0[0] - p1[0], y01 = p0[1] - p1[1], lo = (cw ? rc : -rc) / Math.sqrt(x01 * x01 + y01 * y01), ox = lo * y01, oy = -lo * x01, x1 = p0[0] + ox, y1 = p0[1] + oy, x2 = p1[0] + ox, y2 = p1[1] + oy, x3 = (x1 + x2) / 2, y3 = (y1 + y2) / 2, dx = x2 - x1, dy = y2 - y1, d2 = dx * dx + dy * dy, r = r1 - rc, D = x1 * y2 - x2 * y1, d = (dy < 0 ? -1 : 1) * Math.sqrt(Math.max(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 - x3, dy0 = cy0 - y3, dx1 = cx1 - x3, dy1 = cy1 - y3;
paulo@89:     if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;
paulo@89:     return [ [ cx0 - ox, cy0 - oy ], [ cx0 * r1 / r, cy0 * r1 / r ] ];
paulo@89:   }
paulo@89:   function d3_svg_line(projection) {
paulo@89:     var x = d3_geom_pointX, y = d3_geom_pointY, defined = d3_true, interpolate = d3_svg_lineLinear, interpolateKey = interpolate.key, tension = .7;
paulo@89:     function line(data) {
paulo@89:       var segments = [], points = [], i = -1, n = data.length, d, fx = d3_functor(x), fy = d3_functor(y);
paulo@89:       function segment() {
paulo@89:         segments.push("M", interpolate(projection(points), tension));
paulo@89:       }
paulo@89:       while (++i < n) {
paulo@89:         if (defined.call(this, d = data[i], i)) {
paulo@89:           points.push([ +fx.call(this, d, i), +fy.call(this, d, i) ]);
paulo@89:         } else if (points.length) {
paulo@89:           segment();
paulo@89:           points = [];
paulo@89:         }
paulo@89:       }
paulo@89:       if (points.length) segment();
paulo@89:       return segments.length ? segments.join("") : null;
paulo@89:     }
paulo@89:     line.x = function(_) {
paulo@89:       if (!arguments.length) return x;
paulo@89:       x = _;
paulo@89:       return line;
paulo@89:     };
paulo@89:     line.y = function(_) {
paulo@89:       if (!arguments.length) return y;
paulo@89:       y = _;
paulo@89:       return line;
paulo@89:     };
paulo@89:     line.defined = function(_) {
paulo@89:       if (!arguments.length) return defined;
paulo@89:       defined = _;
paulo@89:       return line;
paulo@89:     };
paulo@89:     line.interpolate = function(_) {
paulo@89:       if (!arguments.length) return interpolateKey;
paulo@89:       if (typeof _ === "function") interpolateKey = interpolate = _; else interpolateKey = (interpolate = d3_svg_lineInterpolators.get(_) || d3_svg_lineLinear).key;
paulo@89:       return line;
paulo@89:     };
paulo@89:     line.tension = function(_) {
paulo@89:       if (!arguments.length) return tension;
paulo@89:       tension = _;
paulo@89:       return line;
paulo@89:     };
paulo@89:     return line;
paulo@89:   }
paulo@89:   d3.svg.line = function() {
paulo@89:     return d3_svg_line(d3_identity);
paulo@89:   };
paulo@89:   var d3_svg_lineInterpolators = d3.map({
paulo@89:     linear: d3_svg_lineLinear,
paulo@89:     "linear-closed": d3_svg_lineLinearClosed,
paulo@89:     step: d3_svg_lineStep,
paulo@89:     "step-before": d3_svg_lineStepBefore,
paulo@89:     "step-after": d3_svg_lineStepAfter,
paulo@89:     basis: d3_svg_lineBasis,
paulo@89:     "basis-open": d3_svg_lineBasisOpen,
paulo@89:     "basis-closed": d3_svg_lineBasisClosed,
paulo@89:     bundle: d3_svg_lineBundle,
paulo@89:     cardinal: d3_svg_lineCardinal,
paulo@89:     "cardinal-open": d3_svg_lineCardinalOpen,
paulo@89:     "cardinal-closed": d3_svg_lineCardinalClosed,
paulo@89:     monotone: d3_svg_lineMonotone
paulo@89:   });
paulo@89:   d3_svg_lineInterpolators.forEach(function(key, value) {
paulo@89:     value.key = key;
paulo@89:     value.closed = /-closed$/.test(key);
paulo@89:   });
paulo@89:   function d3_svg_lineLinear(points) {
paulo@89:     return points.length > 1 ? points.join("L") : points + "Z";
paulo@89:   }
paulo@89:   function d3_svg_lineLinearClosed(points) {
paulo@89:     return points.join("L") + "Z";
paulo@89:   }
paulo@89:   function d3_svg_lineStep(points) {
paulo@89:     var i = 0, n = points.length, p = points[0], path = [ p[0], ",", p[1] ];
paulo@89:     while (++i < n) path.push("H", (p[0] + (p = points[i])[0]) / 2, "V", p[1]);
paulo@89:     if (n > 1) path.push("H", p[0]);
paulo@89:     return path.join("");
paulo@89:   }
paulo@89:   function d3_svg_lineStepBefore(points) {
paulo@89:     var i = 0, n = points.length, p = points[0], path = [ p[0], ",", p[1] ];
paulo@89:     while (++i < n) path.push("V", (p = points[i])[1], "H", p[0]);
paulo@89:     return path.join("");
paulo@89:   }
paulo@89:   function d3_svg_lineStepAfter(points) {
paulo@89:     var i = 0, n = points.length, p = points[0], path = [ p[0], ",", p[1] ];
paulo@89:     while (++i < n) path.push("H", (p = points[i])[0], "V", p[1]);
paulo@89:     return path.join("");
paulo@89:   }
paulo@89:   function d3_svg_lineCardinalOpen(points, tension) {
paulo@89:     return points.length < 4 ? d3_svg_lineLinear(points) : points[1] + d3_svg_lineHermite(points.slice(1, -1), d3_svg_lineCardinalTangents(points, tension));
paulo@89:   }
paulo@89:   function d3_svg_lineCardinalClosed(points, tension) {
paulo@89:     return points.length < 3 ? d3_svg_lineLinearClosed(points) : points[0] + d3_svg_lineHermite((points.push(points[0]), 
paulo@89:     points), d3_svg_lineCardinalTangents([ points[points.length - 2] ].concat(points, [ points[1] ]), tension));
paulo@89:   }
paulo@89:   function d3_svg_lineCardinal(points, tension) {
paulo@89:     return points.length < 3 ? d3_svg_lineLinear(points) : points[0] + d3_svg_lineHermite(points, d3_svg_lineCardinalTangents(points, tension));
paulo@89:   }
paulo@89:   function d3_svg_lineHermite(points, tangents) {
paulo@89:     if (tangents.length < 1 || points.length != tangents.length && points.length != tangents.length + 2) {
paulo@89:       return d3_svg_lineLinear(points);
paulo@89:     }
paulo@89:     var quad = points.length != tangents.length, path = "", p0 = points[0], p = points[1], t0 = tangents[0], t = t0, pi = 1;
paulo@89:     if (quad) {
paulo@89:       path += "Q" + (p[0] - t0[0] * 2 / 3) + "," + (p[1] - t0[1] * 2 / 3) + "," + p[0] + "," + p[1];
paulo@89:       p0 = points[1];
paulo@89:       pi = 2;
paulo@89:     }
paulo@89:     if (tangents.length > 1) {
paulo@89:       t = tangents[1];
paulo@89:       p = points[pi];
paulo@89:       pi++;
paulo@89:       path += "C" + (p0[0] + t0[0]) + "," + (p0[1] + t0[1]) + "," + (p[0] - t[0]) + "," + (p[1] - t[1]) + "," + p[0] + "," + p[1];
paulo@89:       for (var i = 2; i < tangents.length; i++, pi++) {
paulo@89:         p = points[pi];
paulo@89:         t = tangents[i];
paulo@89:         path += "S" + (p[0] - t[0]) + "," + (p[1] - t[1]) + "," + p[0] + "," + p[1];
paulo@89:       }
paulo@89:     }
paulo@89:     if (quad) {
paulo@89:       var lp = points[pi];
paulo@89:       path += "Q" + (p[0] + t[0] * 2 / 3) + "," + (p[1] + t[1] * 2 / 3) + "," + lp[0] + "," + lp[1];
paulo@89:     }
paulo@89:     return path;
paulo@89:   }
paulo@89:   function d3_svg_lineCardinalTangents(points, tension) {
paulo@89:     var tangents = [], a = (1 - tension) / 2, p0, p1 = points[0], p2 = points[1], i = 1, n = points.length;
paulo@89:     while (++i < n) {
paulo@89:       p0 = p1;
paulo@89:       p1 = p2;
paulo@89:       p2 = points[i];
paulo@89:       tangents.push([ a * (p2[0] - p0[0]), a * (p2[1] - p0[1]) ]);
paulo@89:     }
paulo@89:     return tangents;
paulo@89:   }
paulo@89:   function d3_svg_lineBasis(points) {
paulo@89:     if (points.length < 3) return d3_svg_lineLinear(points);
paulo@89:     var i = 1, n = points.length, pi = points[0], x0 = pi[0], y0 = pi[1], px = [ x0, x0, x0, (pi = points[1])[0] ], py = [ y0, y0, y0, pi[1] ], path = [ x0, ",", y0, "L", d3_svg_lineDot4(d3_svg_lineBasisBezier3, px), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, py) ];
paulo@89:     points.push(points[n - 1]);
paulo@89:     while (++i <= n) {
paulo@89:       pi = points[i];
paulo@89:       px.shift();
paulo@89:       px.push(pi[0]);
paulo@89:       py.shift();
paulo@89:       py.push(pi[1]);
paulo@89:       d3_svg_lineBasisBezier(path, px, py);
paulo@89:     }
paulo@89:     points.pop();
paulo@89:     path.push("L", pi);
paulo@89:     return path.join("");
paulo@89:   }
paulo@89:   function d3_svg_lineBasisOpen(points) {
paulo@89:     if (points.length < 4) return d3_svg_lineLinear(points);
paulo@89:     var path = [], i = -1, n = points.length, pi, px = [ 0 ], py = [ 0 ];
paulo@89:     while (++i < 3) {
paulo@89:       pi = points[i];
paulo@89:       px.push(pi[0]);
paulo@89:       py.push(pi[1]);
paulo@89:     }
paulo@89:     path.push(d3_svg_lineDot4(d3_svg_lineBasisBezier3, px) + "," + d3_svg_lineDot4(d3_svg_lineBasisBezier3, py));
paulo@89:     --i;
paulo@89:     while (++i < n) {
paulo@89:       pi = points[i];
paulo@89:       px.shift();
paulo@89:       px.push(pi[0]);
paulo@89:       py.shift();
paulo@89:       py.push(pi[1]);
paulo@89:       d3_svg_lineBasisBezier(path, px, py);
paulo@89:     }
paulo@89:     return path.join("");
paulo@89:   }
paulo@89:   function d3_svg_lineBasisClosed(points) {
paulo@89:     var path, i = -1, n = points.length, m = n + 4, pi, px = [], py = [];
paulo@89:     while (++i < 4) {
paulo@89:       pi = points[i % n];
paulo@89:       px.push(pi[0]);
paulo@89:       py.push(pi[1]);
paulo@89:     }
paulo@89:     path = [ d3_svg_lineDot4(d3_svg_lineBasisBezier3, px), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, py) ];
paulo@89:     --i;
paulo@89:     while (++i < m) {
paulo@89:       pi = points[i % n];
paulo@89:       px.shift();
paulo@89:       px.push(pi[0]);
paulo@89:       py.shift();
paulo@89:       py.push(pi[1]);
paulo@89:       d3_svg_lineBasisBezier(path, px, py);
paulo@89:     }
paulo@89:     return path.join("");
paulo@89:   }
paulo@89:   function d3_svg_lineBundle(points, tension) {
paulo@89:     var n = points.length - 1;
paulo@89:     if (n) {
paulo@89:       var x0 = points[0][0], y0 = points[0][1], dx = points[n][0] - x0, dy = points[n][1] - y0, i = -1, p, t;
paulo@89:       while (++i <= n) {
paulo@89:         p = points[i];
paulo@89:         t = i / n;
paulo@89:         p[0] = tension * p[0] + (1 - tension) * (x0 + t * dx);
paulo@89:         p[1] = tension * p[1] + (1 - tension) * (y0 + t * dy);
paulo@89:       }
paulo@89:     }
paulo@89:     return d3_svg_lineBasis(points);
paulo@89:   }
paulo@89:   function d3_svg_lineDot4(a, b) {
paulo@89:     return a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + a[3] * b[3];
paulo@89:   }
paulo@89:   var d3_svg_lineBasisBezier1 = [ 0, 2 / 3, 1 / 3, 0 ], d3_svg_lineBasisBezier2 = [ 0, 1 / 3, 2 / 3, 0 ], d3_svg_lineBasisBezier3 = [ 0, 1 / 6, 2 / 3, 1 / 6 ];
paulo@89:   function d3_svg_lineBasisBezier(path, x, y) {
paulo@89:     path.push("C", d3_svg_lineDot4(d3_svg_lineBasisBezier1, x), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier1, y), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier2, x), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier2, y), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, x), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, y));
paulo@89:   }
paulo@89:   function d3_svg_lineSlope(p0, p1) {
paulo@89:     return (p1[1] - p0[1]) / (p1[0] - p0[0]);
paulo@89:   }
paulo@89:   function d3_svg_lineFiniteDifferences(points) {
paulo@89:     var i = 0, j = points.length - 1, m = [], p0 = points[0], p1 = points[1], d = m[0] = d3_svg_lineSlope(p0, p1);
paulo@89:     while (++i < j) {
paulo@89:       m[i] = (d + (d = d3_svg_lineSlope(p0 = p1, p1 = points[i + 1]))) / 2;
paulo@89:     }
paulo@89:     m[i] = d;
paulo@89:     return m;
paulo@89:   }
paulo@89:   function d3_svg_lineMonotoneTangents(points) {
paulo@89:     var tangents = [], d, a, b, s, m = d3_svg_lineFiniteDifferences(points), i = -1, j = points.length - 1;
paulo@89:     while (++i < j) {
paulo@89:       d = d3_svg_lineSlope(points[i], points[i + 1]);
paulo@89:       if (abs(d) < ε) {
paulo@89:         m[i] = m[i + 1] = 0;
paulo@89:       } else {
paulo@89:         a = m[i] / d;
paulo@89:         b = m[i + 1] / d;
paulo@89:         s = a * a + b * b;
paulo@89:         if (s > 9) {
paulo@89:           s = d * 3 / Math.sqrt(s);
paulo@89:           m[i] = s * a;
paulo@89:           m[i + 1] = s * b;
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     i = -1;
paulo@89:     while (++i <= j) {
paulo@89:       s = (points[Math.min(j, i + 1)][0] - points[Math.max(0, i - 1)][0]) / (6 * (1 + m[i] * m[i]));
paulo@89:       tangents.push([ s || 0, m[i] * s || 0 ]);
paulo@89:     }
paulo@89:     return tangents;
paulo@89:   }
paulo@89:   function d3_svg_lineMonotone(points) {
paulo@89:     return points.length < 3 ? d3_svg_lineLinear(points) : points[0] + d3_svg_lineHermite(points, d3_svg_lineMonotoneTangents(points));
paulo@89:   }
paulo@89:   d3.svg.line.radial = function() {
paulo@89:     var line = d3_svg_line(d3_svg_lineRadial);
paulo@89:     line.radius = line.x, delete line.x;
paulo@89:     line.angle = line.y, delete line.y;
paulo@89:     return line;
paulo@89:   };
paulo@89:   function d3_svg_lineRadial(points) {
paulo@89:     var point, i = -1, n = points.length, r, a;
paulo@89:     while (++i < n) {
paulo@89:       point = points[i];
paulo@89:       r = point[0];
paulo@89:       a = point[1] - halfπ;
paulo@89:       point[0] = r * Math.cos(a);
paulo@89:       point[1] = r * Math.sin(a);
paulo@89:     }
paulo@89:     return points;
paulo@89:   }
paulo@89:   function d3_svg_area(projection) {
paulo@89:     var x0 = d3_geom_pointX, x1 = d3_geom_pointX, y0 = 0, y1 = d3_geom_pointY, defined = d3_true, interpolate = d3_svg_lineLinear, interpolateKey = interpolate.key, interpolateReverse = interpolate, L = "L", tension = .7;
paulo@89:     function area(data) {
paulo@89:       var segments = [], points0 = [], points1 = [], i = -1, n = data.length, d, fx0 = d3_functor(x0), fy0 = d3_functor(y0), fx1 = x0 === x1 ? function() {
paulo@89:         return x;
paulo@89:       } : d3_functor(x1), fy1 = y0 === y1 ? function() {
paulo@89:         return y;
paulo@89:       } : d3_functor(y1), x, y;
paulo@89:       function segment() {
paulo@89:         segments.push("M", interpolate(projection(points1), tension), L, interpolateReverse(projection(points0.reverse()), tension), "Z");
paulo@89:       }
paulo@89:       while (++i < n) {
paulo@89:         if (defined.call(this, d = data[i], i)) {
paulo@89:           points0.push([ x = +fx0.call(this, d, i), y = +fy0.call(this, d, i) ]);
paulo@89:           points1.push([ +fx1.call(this, d, i), +fy1.call(this, d, i) ]);
paulo@89:         } else if (points0.length) {
paulo@89:           segment();
paulo@89:           points0 = [];
paulo@89:           points1 = [];
paulo@89:         }
paulo@89:       }
paulo@89:       if (points0.length) segment();
paulo@89:       return segments.length ? segments.join("") : null;
paulo@89:     }
paulo@89:     area.x = function(_) {
paulo@89:       if (!arguments.length) return x1;
paulo@89:       x0 = x1 = _;
paulo@89:       return area;
paulo@89:     };
paulo@89:     area.x0 = function(_) {
paulo@89:       if (!arguments.length) return x0;
paulo@89:       x0 = _;
paulo@89:       return area;
paulo@89:     };
paulo@89:     area.x1 = function(_) {
paulo@89:       if (!arguments.length) return x1;
paulo@89:       x1 = _;
paulo@89:       return area;
paulo@89:     };
paulo@89:     area.y = function(_) {
paulo@89:       if (!arguments.length) return y1;
paulo@89:       y0 = y1 = _;
paulo@89:       return area;
paulo@89:     };
paulo@89:     area.y0 = function(_) {
paulo@89:       if (!arguments.length) return y0;
paulo@89:       y0 = _;
paulo@89:       return area;
paulo@89:     };
paulo@89:     area.y1 = function(_) {
paulo@89:       if (!arguments.length) return y1;
paulo@89:       y1 = _;
paulo@89:       return area;
paulo@89:     };
paulo@89:     area.defined = function(_) {
paulo@89:       if (!arguments.length) return defined;
paulo@89:       defined = _;
paulo@89:       return area;
paulo@89:     };
paulo@89:     area.interpolate = function(_) {
paulo@89:       if (!arguments.length) return interpolateKey;
paulo@89:       if (typeof _ === "function") interpolateKey = interpolate = _; else interpolateKey = (interpolate = d3_svg_lineInterpolators.get(_) || d3_svg_lineLinear).key;
paulo@89:       interpolateReverse = interpolate.reverse || interpolate;
paulo@89:       L = interpolate.closed ? "M" : "L";
paulo@89:       return area;
paulo@89:     };
paulo@89:     area.tension = function(_) {
paulo@89:       if (!arguments.length) return tension;
paulo@89:       tension = _;
paulo@89:       return area;
paulo@89:     };
paulo@89:     return area;
paulo@89:   }
paulo@89:   d3_svg_lineStepBefore.reverse = d3_svg_lineStepAfter;
paulo@89:   d3_svg_lineStepAfter.reverse = d3_svg_lineStepBefore;
paulo@89:   d3.svg.area = function() {
paulo@89:     return d3_svg_area(d3_identity);
paulo@89:   };
paulo@89:   d3.svg.area.radial = function() {
paulo@89:     var area = d3_svg_area(d3_svg_lineRadial);
paulo@89:     area.radius = area.x, delete area.x;
paulo@89:     area.innerRadius = area.x0, delete area.x0;
paulo@89:     area.outerRadius = area.x1, delete area.x1;
paulo@89:     area.angle = area.y, delete area.y;
paulo@89:     area.startAngle = area.y0, delete area.y0;
paulo@89:     area.endAngle = area.y1, delete area.y1;
paulo@89:     return area;
paulo@89:   };
paulo@89:   d3.svg.chord = function() {
paulo@89:     var source = d3_source, target = d3_target, radius = d3_svg_chordRadius, startAngle = d3_svg_arcStartAngle, endAngle = d3_svg_arcEndAngle;
paulo@89:     function chord(d, i) {
paulo@89:       var s = subgroup(this, source, d, i), t = subgroup(this, target, d, i);
paulo@89:       return "M" + s.p0 + arc(s.r, s.p1, s.a1 - s.a0) + (equals(s, t) ? curve(s.r, s.p1, s.r, s.p0) : curve(s.r, s.p1, t.r, t.p0) + arc(t.r, t.p1, t.a1 - t.a0) + curve(t.r, t.p1, s.r, s.p0)) + "Z";
paulo@89:     }
paulo@89:     function subgroup(self, f, d, i) {
paulo@89:       var subgroup = f.call(self, d, i), r = radius.call(self, subgroup, i), a0 = startAngle.call(self, subgroup, i) - halfπ, a1 = endAngle.call(self, subgroup, i) - halfπ;
paulo@89:       return {
paulo@89:         r: r,
paulo@89:         a0: a0,
paulo@89:         a1: a1,
paulo@89:         p0: [ r * Math.cos(a0), r * Math.sin(a0) ],
paulo@89:         p1: [ r * Math.cos(a1), r * Math.sin(a1) ]
paulo@89:       };
paulo@89:     }
paulo@89:     function equals(a, b) {
paulo@89:       return a.a0 == b.a0 && a.a1 == b.a1;
paulo@89:     }
paulo@89:     function arc(r, p, a) {
paulo@89:       return "A" + r + "," + r + " 0 " + +(a > π) + ",1 " + p;
paulo@89:     }
paulo@89:     function curve(r0, p0, r1, p1) {
paulo@89:       return "Q 0,0 " + p1;
paulo@89:     }
paulo@89:     chord.radius = function(v) {
paulo@89:       if (!arguments.length) return radius;
paulo@89:       radius = d3_functor(v);
paulo@89:       return chord;
paulo@89:     };
paulo@89:     chord.source = function(v) {
paulo@89:       if (!arguments.length) return source;
paulo@89:       source = d3_functor(v);
paulo@89:       return chord;
paulo@89:     };
paulo@89:     chord.target = function(v) {
paulo@89:       if (!arguments.length) return target;
paulo@89:       target = d3_functor(v);
paulo@89:       return chord;
paulo@89:     };
paulo@89:     chord.startAngle = function(v) {
paulo@89:       if (!arguments.length) return startAngle;
paulo@89:       startAngle = d3_functor(v);
paulo@89:       return chord;
paulo@89:     };
paulo@89:     chord.endAngle = function(v) {
paulo@89:       if (!arguments.length) return endAngle;
paulo@89:       endAngle = d3_functor(v);
paulo@89:       return chord;
paulo@89:     };
paulo@89:     return chord;
paulo@89:   };
paulo@89:   function d3_svg_chordRadius(d) {
paulo@89:     return d.radius;
paulo@89:   }
paulo@89:   d3.svg.diagonal = function() {
paulo@89:     var source = d3_source, target = d3_target, projection = d3_svg_diagonalProjection;
paulo@89:     function diagonal(d, i) {
paulo@89:       var p0 = source.call(this, d, i), p3 = target.call(this, d, i), m = (p0.y + p3.y) / 2, p = [ p0, {
paulo@89:         x: p0.x,
paulo@89:         y: m
paulo@89:       }, {
paulo@89:         x: p3.x,
paulo@89:         y: m
paulo@89:       }, p3 ];
paulo@89:       p = p.map(projection);
paulo@89:       return "M" + p[0] + "C" + p[1] + " " + p[2] + " " + p[3];
paulo@89:     }
paulo@89:     diagonal.source = function(x) {
paulo@89:       if (!arguments.length) return source;
paulo@89:       source = d3_functor(x);
paulo@89:       return diagonal;
paulo@89:     };
paulo@89:     diagonal.target = function(x) {
paulo@89:       if (!arguments.length) return target;
paulo@89:       target = d3_functor(x);
paulo@89:       return diagonal;
paulo@89:     };
paulo@89:     diagonal.projection = function(x) {
paulo@89:       if (!arguments.length) return projection;
paulo@89:       projection = x;
paulo@89:       return diagonal;
paulo@89:     };
paulo@89:     return diagonal;
paulo@89:   };
paulo@89:   function d3_svg_diagonalProjection(d) {
paulo@89:     return [ d.x, d.y ];
paulo@89:   }
paulo@89:   d3.svg.diagonal.radial = function() {
paulo@89:     var diagonal = d3.svg.diagonal(), projection = d3_svg_diagonalProjection, projection_ = diagonal.projection;
paulo@89:     diagonal.projection = function(x) {
paulo@89:       return arguments.length ? projection_(d3_svg_diagonalRadialProjection(projection = x)) : projection;
paulo@89:     };
paulo@89:     return diagonal;
paulo@89:   };
paulo@89:   function d3_svg_diagonalRadialProjection(projection) {
paulo@89:     return function() {
paulo@89:       var d = projection.apply(this, arguments), r = d[0], a = d[1] - halfπ;
paulo@89:       return [ r * Math.cos(a), r * Math.sin(a) ];
paulo@89:     };
paulo@89:   }
paulo@89:   d3.svg.symbol = function() {
paulo@89:     var type = d3_svg_symbolType, size = d3_svg_symbolSize;
paulo@89:     function symbol(d, i) {
paulo@89:       return (d3_svg_symbols.get(type.call(this, d, i)) || d3_svg_symbolCircle)(size.call(this, d, i));
paulo@89:     }
paulo@89:     symbol.type = function(x) {
paulo@89:       if (!arguments.length) return type;
paulo@89:       type = d3_functor(x);
paulo@89:       return symbol;
paulo@89:     };
paulo@89:     symbol.size = function(x) {
paulo@89:       if (!arguments.length) return size;
paulo@89:       size = d3_functor(x);
paulo@89:       return symbol;
paulo@89:     };
paulo@89:     return symbol;
paulo@89:   };
paulo@89:   function d3_svg_symbolSize() {
paulo@89:     return 64;
paulo@89:   }
paulo@89:   function d3_svg_symbolType() {
paulo@89:     return "circle";
paulo@89:   }
paulo@89:   function d3_svg_symbolCircle(size) {
paulo@89:     var r = Math.sqrt(size / π);
paulo@89:     return "M0," + r + "A" + r + "," + r + " 0 1,1 0," + -r + "A" + r + "," + r + " 0 1,1 0," + r + "Z";
paulo@89:   }
paulo@89:   var d3_svg_symbols = d3.map({
paulo@89:     circle: d3_svg_symbolCircle,
paulo@89:     cross: function(size) {
paulo@89:       var r = Math.sqrt(size / 5) / 2;
paulo@89:       return "M" + -3 * r + "," + -r + "H" + -r + "V" + -3 * r + "H" + r + "V" + -r + "H" + 3 * r + "V" + r + "H" + r + "V" + 3 * r + "H" + -r + "V" + r + "H" + -3 * r + "Z";
paulo@89:     },
paulo@89:     diamond: function(size) {
paulo@89:       var ry = Math.sqrt(size / (2 * d3_svg_symbolTan30)), rx = ry * d3_svg_symbolTan30;
paulo@89:       return "M0," + -ry + "L" + rx + ",0" + " 0," + ry + " " + -rx + ",0" + "Z";
paulo@89:     },
paulo@89:     square: function(size) {
paulo@89:       var r = Math.sqrt(size) / 2;
paulo@89:       return "M" + -r + "," + -r + "L" + r + "," + -r + " " + r + "," + r + " " + -r + "," + r + "Z";
paulo@89:     },
paulo@89:     "triangle-down": function(size) {
paulo@89:       var rx = Math.sqrt(size / d3_svg_symbolSqrt3), ry = rx * d3_svg_symbolSqrt3 / 2;
paulo@89:       return "M0," + ry + "L" + rx + "," + -ry + " " + -rx + "," + -ry + "Z";
paulo@89:     },
paulo@89:     "triangle-up": function(size) {
paulo@89:       var rx = Math.sqrt(size / d3_svg_symbolSqrt3), ry = rx * d3_svg_symbolSqrt3 / 2;
paulo@89:       return "M0," + -ry + "L" + rx + "," + ry + " " + -rx + "," + ry + "Z";
paulo@89:     }
paulo@89:   });
paulo@89:   d3.svg.symbolTypes = d3_svg_symbols.keys();
paulo@89:   var d3_svg_symbolSqrt3 = Math.sqrt(3), d3_svg_symbolTan30 = Math.tan(30 * d3_radians);
paulo@89:   d3_selectionPrototype.transition = function(name) {
paulo@89:     var id = d3_transitionInheritId || ++d3_transitionId, ns = d3_transitionNamespace(name), subgroups = [], subgroup, node, transition = d3_transitionInherit || {
paulo@89:       time: Date.now(),
paulo@89:       ease: d3_ease_cubicInOut,
paulo@89:       delay: 0,
paulo@89:       duration: 250
paulo@89:     };
paulo@89:     for (var j = -1, m = this.length; ++j < m; ) {
paulo@89:       subgroups.push(subgroup = []);
paulo@89:       for (var group = this[j], i = -1, n = group.length; ++i < n; ) {
paulo@89:         if (node = group[i]) d3_transitionNode(node, i, ns, id, transition);
paulo@89:         subgroup.push(node);
paulo@89:       }
paulo@89:     }
paulo@89:     return d3_transition(subgroups, ns, id);
paulo@89:   };
paulo@89:   d3_selectionPrototype.interrupt = function(name) {
paulo@89:     return this.each(name == null ? d3_selection_interrupt : d3_selection_interruptNS(d3_transitionNamespace(name)));
paulo@89:   };
paulo@89:   var d3_selection_interrupt = d3_selection_interruptNS(d3_transitionNamespace());
paulo@89:   function d3_selection_interruptNS(ns) {
paulo@89:     return function() {
paulo@89:       var lock, activeId, active;
paulo@89:       if ((lock = this[ns]) && (active = lock[activeId = lock.active])) {
paulo@89:         active.timer.c = null;
paulo@89:         active.timer.t = NaN;
paulo@89:         if (--lock.count) delete lock[activeId]; else delete this[ns];
paulo@89:         lock.active += .5;
paulo@89:         active.event && active.event.interrupt.call(this, this.__data__, active.index);
paulo@89:       }
paulo@89:     };
paulo@89:   }
paulo@89:   function d3_transition(groups, ns, id) {
paulo@89:     d3_subclass(groups, d3_transitionPrototype);
paulo@89:     groups.namespace = ns;
paulo@89:     groups.id = id;
paulo@89:     return groups;
paulo@89:   }
paulo@89:   var d3_transitionPrototype = [], d3_transitionId = 0, d3_transitionInheritId, d3_transitionInherit;
paulo@89:   d3_transitionPrototype.call = d3_selectionPrototype.call;
paulo@89:   d3_transitionPrototype.empty = d3_selectionPrototype.empty;
paulo@89:   d3_transitionPrototype.node = d3_selectionPrototype.node;
paulo@89:   d3_transitionPrototype.size = d3_selectionPrototype.size;
paulo@89:   d3.transition = function(selection, name) {
paulo@89:     return selection && selection.transition ? d3_transitionInheritId ? selection.transition(name) : selection : d3.selection().transition(selection);
paulo@89:   };
paulo@89:   d3.transition.prototype = d3_transitionPrototype;
paulo@89:   d3_transitionPrototype.select = function(selector) {
paulo@89:     var id = this.id, ns = this.namespace, subgroups = [], subgroup, subnode, node;
paulo@89:     selector = d3_selection_selector(selector);
paulo@89:     for (var j = -1, m = this.length; ++j < m; ) {
paulo@89:       subgroups.push(subgroup = []);
paulo@89:       for (var group = this[j], i = -1, n = group.length; ++i < n; ) {
paulo@89:         if ((node = group[i]) && (subnode = selector.call(node, node.__data__, i, j))) {
paulo@89:           if ("__data__" in node) subnode.__data__ = node.__data__;
paulo@89:           d3_transitionNode(subnode, i, ns, id, node[ns][id]);
paulo@89:           subgroup.push(subnode);
paulo@89:         } else {
paulo@89:           subgroup.push(null);
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     return d3_transition(subgroups, ns, id);
paulo@89:   };
paulo@89:   d3_transitionPrototype.selectAll = function(selector) {
paulo@89:     var id = this.id, ns = this.namespace, subgroups = [], subgroup, subnodes, node, subnode, transition;
paulo@89:     selector = d3_selection_selectorAll(selector);
paulo@89:     for (var j = -1, m = this.length; ++j < m; ) {
paulo@89:       for (var group = this[j], i = -1, n = group.length; ++i < n; ) {
paulo@89:         if (node = group[i]) {
paulo@89:           transition = node[ns][id];
paulo@89:           subnodes = selector.call(node, node.__data__, i, j);
paulo@89:           subgroups.push(subgroup = []);
paulo@89:           for (var k = -1, o = subnodes.length; ++k < o; ) {
paulo@89:             if (subnode = subnodes[k]) d3_transitionNode(subnode, k, ns, id, transition);
paulo@89:             subgroup.push(subnode);
paulo@89:           }
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     return d3_transition(subgroups, ns, id);
paulo@89:   };
paulo@89:   d3_transitionPrototype.filter = function(filter) {
paulo@89:     var subgroups = [], subgroup, group, node;
paulo@89:     if (typeof filter !== "function") filter = d3_selection_filter(filter);
paulo@89:     for (var j = 0, m = this.length; j < m; j++) {
paulo@89:       subgroups.push(subgroup = []);
paulo@89:       for (var group = this[j], i = 0, n = group.length; i < n; i++) {
paulo@89:         if ((node = group[i]) && filter.call(node, node.__data__, i, j)) {
paulo@89:           subgroup.push(node);
paulo@89:         }
paulo@89:       }
paulo@89:     }
paulo@89:     return d3_transition(subgroups, this.namespace, this.id);
paulo@89:   };
paulo@89:   d3_transitionPrototype.tween = function(name, tween) {
paulo@89:     var id = this.id, ns = this.namespace;
paulo@89:     if (arguments.length < 2) return this.node()[ns][id].tween.get(name);
paulo@89:     return d3_selection_each(this, tween == null ? function(node) {
paulo@89:       node[ns][id].tween.remove(name);
paulo@89:     } : function(node) {
paulo@89:       node[ns][id].tween.set(name, tween);
paulo@89:     });
paulo@89:   };
paulo@89:   function d3_transition_tween(groups, name, value, tween) {
paulo@89:     var id = groups.id, ns = groups.namespace;
paulo@89:     return d3_selection_each(groups, typeof value === "function" ? function(node, i, j) {
paulo@89:       node[ns][id].tween.set(name, tween(value.call(node, node.__data__, i, j)));
paulo@89:     } : (value = tween(value), function(node) {
paulo@89:       node[ns][id].tween.set(name, value);
paulo@89:     }));
paulo@89:   }
paulo@89:   d3_transitionPrototype.attr = function(nameNS, value) {
paulo@89:     if (arguments.length < 2) {
paulo@89:       for (value in nameNS) this.attr(value, nameNS[value]);
paulo@89:       return this;
paulo@89:     }
paulo@89:     var interpolate = nameNS == "transform" ? d3_interpolateTransform : d3_interpolate, name = d3.ns.qualify(nameNS);
paulo@89:     function attrNull() {
paulo@89:       this.removeAttribute(name);
paulo@89:     }
paulo@89:     function attrNullNS() {
paulo@89:       this.removeAttributeNS(name.space, name.local);
paulo@89:     }
paulo@89:     function attrTween(b) {
paulo@89:       return b == null ? attrNull : (b += "", function() {
paulo@89:         var a = this.getAttribute(name), i;
paulo@89:         return a !== b && (i = interpolate(a, b), function(t) {
paulo@89:           this.setAttribute(name, i(t));
paulo@89:         });
paulo@89:       });
paulo@89:     }
paulo@89:     function attrTweenNS(b) {
paulo@89:       return b == null ? attrNullNS : (b += "", function() {
paulo@89:         var a = this.getAttributeNS(name.space, name.local), i;
paulo@89:         return a !== b && (i = interpolate(a, b), function(t) {
paulo@89:           this.setAttributeNS(name.space, name.local, i(t));
paulo@89:         });
paulo@89:       });
paulo@89:     }
paulo@89:     return d3_transition_tween(this, "attr." + nameNS, value, name.local ? attrTweenNS : attrTween);
paulo@89:   };
paulo@89:   d3_transitionPrototype.attrTween = function(nameNS, tween) {
paulo@89:     var name = d3.ns.qualify(nameNS);
paulo@89:     function attrTween(d, i) {
paulo@89:       var f = tween.call(this, d, i, this.getAttribute(name));
paulo@89:       return f && function(t) {
paulo@89:         this.setAttribute(name, f(t));
paulo@89:       };
paulo@89:     }
paulo@89:     function attrTweenNS(d, i) {
paulo@89:       var f = tween.call(this, d, i, this.getAttributeNS(name.space, name.local));
paulo@89:       return f && function(t) {
paulo@89:         this.setAttributeNS(name.space, name.local, f(t));
paulo@89:       };
paulo@89:     }
paulo@89:     return this.tween("attr." + nameNS, name.local ? attrTweenNS : attrTween);
paulo@89:   };
paulo@89:   d3_transitionPrototype.style = function(name, value, priority) {
paulo@89:     var n = arguments.length;
paulo@89:     if (n < 3) {
paulo@89:       if (typeof name !== "string") {
paulo@89:         if (n < 2) value = "";
paulo@89:         for (priority in name) this.style(priority, name[priority], value);
paulo@89:         return this;
paulo@89:       }
paulo@89:       priority = "";
paulo@89:     }
paulo@89:     function styleNull() {
paulo@89:       this.style.removeProperty(name);
paulo@89:     }
paulo@89:     function styleString(b) {
paulo@89:       return b == null ? styleNull : (b += "", function() {
paulo@89:         var a = d3_window(this).getComputedStyle(this, null).getPropertyValue(name), i;
paulo@89:         return a !== b && (i = d3_interpolate(a, b), function(t) {
paulo@89:           this.style.setProperty(name, i(t), priority);
paulo@89:         });
paulo@89:       });
paulo@89:     }
paulo@89:     return d3_transition_tween(this, "style." + name, value, styleString);
paulo@89:   };
paulo@89:   d3_transitionPrototype.styleTween = function(name, tween, priority) {
paulo@89:     if (arguments.length < 3) priority = "";
paulo@89:     function styleTween(d, i) {
paulo@89:       var f = tween.call(this, d, i, d3_window(this).getComputedStyle(this, null).getPropertyValue(name));
paulo@89:       return f && function(t) {
paulo@89:         this.style.setProperty(name, f(t), priority);
paulo@89:       };
paulo@89:     }
paulo@89:     return this.tween("style." + name, styleTween);
paulo@89:   };
paulo@89:   d3_transitionPrototype.text = function(value) {
paulo@89:     return d3_transition_tween(this, "text", value, d3_transition_text);
paulo@89:   };
paulo@89:   function d3_transition_text(b) {
paulo@89:     if (b == null) b = "";
paulo@89:     return function() {
paulo@89:       this.textContent = b;
paulo@89:     };
paulo@89:   }
paulo@89:   d3_transitionPrototype.remove = function() {
paulo@89:     var ns = this.namespace;
paulo@89:     return this.each("end.transition", function() {
paulo@89:       var p;
paulo@89:       if (this[ns].count < 2 && (p = this.parentNode)) p.removeChild(this);
paulo@89:     });
paulo@89:   };
paulo@89:   d3_transitionPrototype.ease = function(value) {
paulo@89:     var id = this.id, ns = this.namespace;
paulo@89:     if (arguments.length < 1) return this.node()[ns][id].ease;
paulo@89:     if (typeof value !== "function") value = d3.ease.apply(d3, arguments);
paulo@89:     return d3_selection_each(this, function(node) {
paulo@89:       node[ns][id].ease = value;
paulo@89:     });
paulo@89:   };
paulo@89:   d3_transitionPrototype.delay = function(value) {
paulo@89:     var id = this.id, ns = this.namespace;
paulo@89:     if (arguments.length < 1) return this.node()[ns][id].delay;
paulo@89:     return d3_selection_each(this, typeof value === "function" ? function(node, i, j) {
paulo@89:       node[ns][id].delay = +value.call(node, node.__data__, i, j);
paulo@89:     } : (value = +value, function(node) {
paulo@89:       node[ns][id].delay = value;
paulo@89:     }));
paulo@89:   };
paulo@89:   d3_transitionPrototype.duration = function(value) {
paulo@89:     var id = this.id, ns = this.namespace;
paulo@89:     if (arguments.length < 1) return this.node()[ns][id].duration;
paulo@89:     return d3_selection_each(this, typeof value === "function" ? function(node, i, j) {
paulo@89:       node[ns][id].duration = Math.max(1, value.call(node, node.__data__, i, j));
paulo@89:     } : (value = Math.max(1, value), function(node) {
paulo@89:       node[ns][id].duration = value;
paulo@89:     }));
paulo@89:   };
paulo@89:   d3_transitionPrototype.each = function(type, listener) {
paulo@89:     var id = this.id, ns = this.namespace;
paulo@89:     if (arguments.length < 2) {
paulo@89:       var inherit = d3_transitionInherit, inheritId = d3_transitionInheritId;
paulo@89:       try {
paulo@89:         d3_transitionInheritId = id;
paulo@89:         d3_selection_each(this, function(node, i, j) {
paulo@89:           d3_transitionInherit = node[ns][id];
paulo@89:           type.call(node, node.__data__, i, j);
paulo@89:         });
paulo@89:       } finally {
paulo@89:         d3_transitionInherit = inherit;
paulo@89:         d3_transitionInheritId = inheritId;
paulo@89:       }
paulo@89:     } else {
paulo@89:       d3_selection_each(this, function(node) {
paulo@89:         var transition = node[ns][id];
paulo@89:         (transition.event || (transition.event = d3.dispatch("start", "end", "interrupt"))).on(type, listener);
paulo@89:       });
paulo@89:     }
paulo@89:     return this;
paulo@89:   };
paulo@89:   d3_transitionPrototype.transition = function() {
paulo@89:     var id0 = this.id, id1 = ++d3_transitionId, ns = this.namespace, subgroups = [], subgroup, group, node, transition;
paulo@89:     for (var j = 0, m = this.length; j < m; j++) {
paulo@89:       subgroups.push(subgroup = []);
paulo@89:       for (var group = this[j], i = 0, n = group.length; i < n; i++) {
paulo@89:         if (node = group[i]) {
paulo@89:           transition = node[ns][id0];
paulo@89:           d3_transitionNode(node, i, ns, id1, {
paulo@89:             time: transition.time,
paulo@89:             ease: transition.ease,
paulo@89:             delay: transition.delay + transition.duration,
paulo@89:             duration: transition.duration
paulo@89:           });
paulo@89:         }
paulo@89:         subgroup.push(node);
paulo@89:       }
paulo@89:     }
paulo@89:     return d3_transition(subgroups, ns, id1);
paulo@89:   };
paulo@89:   function d3_transitionNamespace(name) {
paulo@89:     return name == null ? "__transition__" : "__transition_" + name + "__";
paulo@89:   }
paulo@89:   function d3_transitionNode(node, i, ns, id, inherit) {
paulo@89:     var lock = node[ns] || (node[ns] = {
paulo@89:       active: 0,
paulo@89:       count: 0
paulo@89:     }), transition = lock[id], time, timer, duration, ease, tweens;
paulo@89:     function schedule(elapsed) {
paulo@89:       var delay = transition.delay;
paulo@89:       timer.t = delay + time;
paulo@89:       if (delay <= elapsed) return start(elapsed - delay);
paulo@89:       timer.c = start;
paulo@89:     }
paulo@89:     function start(elapsed) {
paulo@89:       var activeId = lock.active, active = lock[activeId];
paulo@89:       if (active) {
paulo@89:         active.timer.c = null;
paulo@89:         active.timer.t = NaN;
paulo@89:         --lock.count;
paulo@89:         delete lock[activeId];
paulo@89:         active.event && active.event.interrupt.call(node, node.__data__, active.index);
paulo@89:       }
paulo@89:       for (var cancelId in lock) {
paulo@89:         if (+cancelId < id) {
paulo@89:           var cancel = lock[cancelId];
paulo@89:           cancel.timer.c = null;
paulo@89:           cancel.timer.t = NaN;
paulo@89:           --lock.count;
paulo@89:           delete lock[cancelId];
paulo@89:         }
paulo@89:       }
paulo@89:       timer.c = tick;
paulo@89:       d3_timer(function() {
paulo@89:         if (timer.c && tick(elapsed || 1)) {
paulo@89:           timer.c = null;
paulo@89:           timer.t = NaN;
paulo@89:         }
paulo@89:         return 1;
paulo@89:       }, 0, time);
paulo@89:       lock.active = id;
paulo@89:       transition.event && transition.event.start.call(node, node.__data__, i);
paulo@89:       tweens = [];
paulo@89:       transition.tween.forEach(function(key, value) {
paulo@89:         if (value = value.call(node, node.__data__, i)) {
paulo@89:           tweens.push(value);
paulo@89:         }
paulo@89:       });
paulo@89:       ease = transition.ease;
paulo@89:       duration = transition.duration;
paulo@89:     }
paulo@89:     function tick(elapsed) {
paulo@89:       var t = elapsed / duration, e = ease(t), n = tweens.length;
paulo@89:       while (n > 0) {
paulo@89:         tweens[--n].call(node, e);
paulo@89:       }
paulo@89:       if (t >= 1) {
paulo@89:         transition.event && transition.event.end.call(node, node.__data__, i);
paulo@89:         if (--lock.count) delete lock[id]; else delete node[ns];
paulo@89:         return 1;
paulo@89:       }
paulo@89:     }
paulo@89:     if (!transition) {
paulo@89:       time = inherit.time;
paulo@89:       timer = d3_timer(schedule, 0, time);
paulo@89:       transition = lock[id] = {
paulo@89:         tween: new d3_Map(),
paulo@89:         time: time,
paulo@89:         timer: timer,
paulo@89:         delay: inherit.delay,
paulo@89:         duration: inherit.duration,
paulo@89:         ease: inherit.ease,
paulo@89:         index: i
paulo@89:       };
paulo@89:       inherit = null;
paulo@89:       ++lock.count;
paulo@89:     }
paulo@89:   }
paulo@89:   d3.svg.axis = function() {
paulo@89:     var scale = d3.scale.linear(), orient = d3_svg_axisDefaultOrient, innerTickSize = 6, outerTickSize = 6, tickPadding = 3, tickArguments_ = [ 10 ], tickValues = null, tickFormat_;
paulo@89:     function axis(g) {
paulo@89:       g.each(function() {
paulo@89:         var g = d3.select(this);
paulo@89:         var scale0 = this.__chart__ || scale, scale1 = this.__chart__ = scale.copy();
paulo@89:         var ticks = tickValues == null ? scale1.ticks ? scale1.ticks.apply(scale1, tickArguments_) : scale1.domain() : tickValues, tickFormat = tickFormat_ == null ? scale1.tickFormat ? scale1.tickFormat.apply(scale1, tickArguments_) : d3_identity : tickFormat_, tick = g.selectAll(".tick").data(ticks, scale1), tickEnter = tick.enter().insert("g", ".domain").attr("class", "tick").style("opacity", ε), tickExit = d3.transition(tick.exit()).style("opacity", ε).remove(), tickUpdate = d3.transition(tick.order()).style("opacity", 1), tickSpacing = Math.max(innerTickSize, 0) + tickPadding, tickTransform;
paulo@89:         var range = d3_scaleRange(scale1), path = g.selectAll(".domain").data([ 0 ]), pathUpdate = (path.enter().append("path").attr("class", "domain"), 
paulo@89:         d3.transition(path));
paulo@89:         tickEnter.append("line");
paulo@89:         tickEnter.append("text");
paulo@89:         var lineEnter = tickEnter.select("line"), lineUpdate = tickUpdate.select("line"), text = tick.select("text").text(tickFormat), textEnter = tickEnter.select("text"), textUpdate = tickUpdate.select("text"), sign = orient === "top" || orient === "left" ? -1 : 1, x1, x2, y1, y2;
paulo@89:         if (orient === "bottom" || orient === "top") {
paulo@89:           tickTransform = d3_svg_axisX, x1 = "x", y1 = "y", x2 = "x2", y2 = "y2";
paulo@89:           text.attr("dy", sign < 0 ? "0em" : ".71em").style("text-anchor", "middle");
paulo@89:           pathUpdate.attr("d", "M" + range[0] + "," + sign * outerTickSize + "V0H" + range[1] + "V" + sign * outerTickSize);
paulo@89:         } else {
paulo@89:           tickTransform = d3_svg_axisY, x1 = "y", y1 = "x", x2 = "y2", y2 = "x2";
paulo@89:           text.attr("dy", ".32em").style("text-anchor", sign < 0 ? "end" : "start");
paulo@89:           pathUpdate.attr("d", "M" + sign * outerTickSize + "," + range[0] + "H0V" + range[1] + "H" + sign * outerTickSize);
paulo@89:         }
paulo@89:         lineEnter.attr(y2, sign * innerTickSize);
paulo@89:         textEnter.attr(y1, sign * tickSpacing);
paulo@89:         lineUpdate.attr(x2, 0).attr(y2, sign * innerTickSize);
paulo@89:         textUpdate.attr(x1, 0).attr(y1, sign * tickSpacing);
paulo@89:         if (scale1.rangeBand) {
paulo@89:           var x = scale1, dx = x.rangeBand() / 2;
paulo@89:           scale0 = scale1 = function(d) {
paulo@89:             return x(d) + dx;
paulo@89:           };
paulo@89:         } else if (scale0.rangeBand) {
paulo@89:           scale0 = scale1;
paulo@89:         } else {
paulo@89:           tickExit.call(tickTransform, scale1, scale0);
paulo@89:         }
paulo@89:         tickEnter.call(tickTransform, scale0, scale1);
paulo@89:         tickUpdate.call(tickTransform, scale1, scale1);
paulo@89:       });
paulo@89:     }
paulo@89:     axis.scale = function(x) {
paulo@89:       if (!arguments.length) return scale;
paulo@89:       scale = x;
paulo@89:       return axis;
paulo@89:     };
paulo@89:     axis.orient = function(x) {
paulo@89:       if (!arguments.length) return orient;
paulo@89:       orient = x in d3_svg_axisOrients ? x + "" : d3_svg_axisDefaultOrient;
paulo@89:       return axis;
paulo@89:     };
paulo@89:     axis.ticks = function() {
paulo@89:       if (!arguments.length) return tickArguments_;
paulo@89:       tickArguments_ = d3_array(arguments);
paulo@89:       return axis;
paulo@89:     };
paulo@89:     axis.tickValues = function(x) {
paulo@89:       if (!arguments.length) return tickValues;
paulo@89:       tickValues = x;
paulo@89:       return axis;
paulo@89:     };
paulo@89:     axis.tickFormat = function(x) {
paulo@89:       if (!arguments.length) return tickFormat_;
paulo@89:       tickFormat_ = x;
paulo@89:       return axis;
paulo@89:     };
paulo@89:     axis.tickSize = function(x) {
paulo@89:       var n = arguments.length;
paulo@89:       if (!n) return innerTickSize;
paulo@89:       innerTickSize = +x;
paulo@89:       outerTickSize = +arguments[n - 1];
paulo@89:       return axis;
paulo@89:     };
paulo@89:     axis.innerTickSize = function(x) {
paulo@89:       if (!arguments.length) return innerTickSize;
paulo@89:       innerTickSize = +x;
paulo@89:       return axis;
paulo@89:     };
paulo@89:     axis.outerTickSize = function(x) {
paulo@89:       if (!arguments.length) return outerTickSize;
paulo@89:       outerTickSize = +x;
paulo@89:       return axis;
paulo@89:     };
paulo@89:     axis.tickPadding = function(x) {
paulo@89:       if (!arguments.length) return tickPadding;
paulo@89:       tickPadding = +x;
paulo@89:       return axis;
paulo@89:     };
paulo@89:     axis.tickSubdivide = function() {
paulo@89:       return arguments.length && axis;
paulo@89:     };
paulo@89:     return axis;
paulo@89:   };
paulo@89:   var d3_svg_axisDefaultOrient = "bottom", d3_svg_axisOrients = {
paulo@89:     top: 1,
paulo@89:     right: 1,
paulo@89:     bottom: 1,
paulo@89:     left: 1
paulo@89:   };
paulo@89:   function d3_svg_axisX(selection, x0, x1) {
paulo@89:     selection.attr("transform", function(d) {
paulo@89:       var v0 = x0(d);
paulo@89:       return "translate(" + (isFinite(v0) ? v0 : x1(d)) + ",0)";
paulo@89:     });
paulo@89:   }
paulo@89:   function d3_svg_axisY(selection, y0, y1) {
paulo@89:     selection.attr("transform", function(d) {
paulo@89:       var v0 = y0(d);
paulo@89:       return "translate(0," + (isFinite(v0) ? v0 : y1(d)) + ")";
paulo@89:     });
paulo@89:   }
paulo@89:   d3.svg.brush = function() {
paulo@89:     var event = d3_eventDispatch(brush, "brushstart", "brush", "brushend"), x = null, y = null, xExtent = [ 0, 0 ], yExtent = [ 0, 0 ], xExtentDomain, yExtentDomain, xClamp = true, yClamp = true, resizes = d3_svg_brushResizes[0];
paulo@89:     function brush(g) {
paulo@89:       g.each(function() {
paulo@89:         var g = d3.select(this).style("pointer-events", "all").style("-webkit-tap-highlight-color", "rgba(0,0,0,0)").on("mousedown.brush", brushstart).on("touchstart.brush", brushstart);
paulo@89:         var background = g.selectAll(".background").data([ 0 ]);
paulo@89:         background.enter().append("rect").attr("class", "background").style("visibility", "hidden").style("cursor", "crosshair");
paulo@89:         g.selectAll(".extent").data([ 0 ]).enter().append("rect").attr("class", "extent").style("cursor", "move");
paulo@89:         var resize = g.selectAll(".resize").data(resizes, d3_identity);
paulo@89:         resize.exit().remove();
paulo@89:         resize.enter().append("g").attr("class", function(d) {
paulo@89:           return "resize " + d;
paulo@89:         }).style("cursor", function(d) {
paulo@89:           return d3_svg_brushCursor[d];
paulo@89:         }).append("rect").attr("x", function(d) {
paulo@89:           return /[ew]$/.test(d) ? -3 : null;
paulo@89:         }).attr("y", function(d) {
paulo@89:           return /^[ns]/.test(d) ? -3 : null;
paulo@89:         }).attr("width", 6).attr("height", 6).style("visibility", "hidden");
paulo@89:         resize.style("display", brush.empty() ? "none" : null);
paulo@89:         var gUpdate = d3.transition(g), backgroundUpdate = d3.transition(background), range;
paulo@89:         if (x) {
paulo@89:           range = d3_scaleRange(x);
paulo@89:           backgroundUpdate.attr("x", range[0]).attr("width", range[1] - range[0]);
paulo@89:           redrawX(gUpdate);
paulo@89:         }
paulo@89:         if (y) {
paulo@89:           range = d3_scaleRange(y);
paulo@89:           backgroundUpdate.attr("y", range[0]).attr("height", range[1] - range[0]);
paulo@89:           redrawY(gUpdate);
paulo@89:         }
paulo@89:         redraw(gUpdate);
paulo@89:       });
paulo@89:     }
paulo@89:     brush.event = function(g) {
paulo@89:       g.each(function() {
paulo@89:         var event_ = event.of(this, arguments), extent1 = {
paulo@89:           x: xExtent,
paulo@89:           y: yExtent,
paulo@89:           i: xExtentDomain,
paulo@89:           j: yExtentDomain
paulo@89:         }, extent0 = this.__chart__ || extent1;
paulo@89:         this.__chart__ = extent1;
paulo@89:         if (d3_transitionInheritId) {
paulo@89:           d3.select(this).transition().each("start.brush", function() {
paulo@89:             xExtentDomain = extent0.i;
paulo@89:             yExtentDomain = extent0.j;
paulo@89:             xExtent = extent0.x;
paulo@89:             yExtent = extent0.y;
paulo@89:             event_({
paulo@89:               type: "brushstart"
paulo@89:             });
paulo@89:           }).tween("brush:brush", function() {
paulo@89:             var xi = d3_interpolateArray(xExtent, extent1.x), yi = d3_interpolateArray(yExtent, extent1.y);
paulo@89:             xExtentDomain = yExtentDomain = null;
paulo@89:             return function(t) {
paulo@89:               xExtent = extent1.x = xi(t);
paulo@89:               yExtent = extent1.y = yi(t);
paulo@89:               event_({
paulo@89:                 type: "brush",
paulo@89:                 mode: "resize"
paulo@89:               });
paulo@89:             };
paulo@89:           }).each("end.brush", function() {
paulo@89:             xExtentDomain = extent1.i;
paulo@89:             yExtentDomain = extent1.j;
paulo@89:             event_({
paulo@89:               type: "brush",
paulo@89:               mode: "resize"
paulo@89:             });
paulo@89:             event_({
paulo@89:               type: "brushend"
paulo@89:             });
paulo@89:           });
paulo@89:         } else {
paulo@89:           event_({
paulo@89:             type: "brushstart"
paulo@89:           });
paulo@89:           event_({
paulo@89:             type: "brush",
paulo@89:             mode: "resize"
paulo@89:           });
paulo@89:           event_({
paulo@89:             type: "brushend"
paulo@89:           });
paulo@89:         }
paulo@89:       });
paulo@89:     };
paulo@89:     function redraw(g) {
paulo@89:       g.selectAll(".resize").attr("transform", function(d) {
paulo@89:         return "translate(" + xExtent[+/e$/.test(d)] + "," + yExtent[+/^s/.test(d)] + ")";
paulo@89:       });
paulo@89:     }
paulo@89:     function redrawX(g) {
paulo@89:       g.select(".extent").attr("x", xExtent[0]);
paulo@89:       g.selectAll(".extent,.n>rect,.s>rect").attr("width", xExtent[1] - xExtent[0]);
paulo@89:     }
paulo@89:     function redrawY(g) {
paulo@89:       g.select(".extent").attr("y", yExtent[0]);
paulo@89:       g.selectAll(".extent,.e>rect,.w>rect").attr("height", yExtent[1] - yExtent[0]);
paulo@89:     }
paulo@89:     function brushstart() {
paulo@89:       var target = this, eventTarget = d3.select(d3.event.target), event_ = event.of(target, arguments), g = d3.select(target), resizing = eventTarget.datum(), resizingX = !/^(n|s)$/.test(resizing) && x, resizingY = !/^(e|w)$/.test(resizing) && y, dragging = eventTarget.classed("extent"), dragRestore = d3_event_dragSuppress(target), center, origin = d3.mouse(target), offset;
paulo@89:       var w = d3.select(d3_window(target)).on("keydown.brush", keydown).on("keyup.brush", keyup);
paulo@89:       if (d3.event.changedTouches) {
paulo@89:         w.on("touchmove.brush", brushmove).on("touchend.brush", brushend);
paulo@89:       } else {
paulo@89:         w.on("mousemove.brush", brushmove).on("mouseup.brush", brushend);
paulo@89:       }
paulo@89:       g.interrupt().selectAll("*").interrupt();
paulo@89:       if (dragging) {
paulo@89:         origin[0] = xExtent[0] - origin[0];
paulo@89:         origin[1] = yExtent[0] - origin[1];
paulo@89:       } else if (resizing) {
paulo@89:         var ex = +/w$/.test(resizing), ey = +/^n/.test(resizing);
paulo@89:         offset = [ xExtent[1 - ex] - origin[0], yExtent[1 - ey] - origin[1] ];
paulo@89:         origin[0] = xExtent[ex];
paulo@89:         origin[1] = yExtent[ey];
paulo@89:       } else if (d3.event.altKey) center = origin.slice();
paulo@89:       g.style("pointer-events", "none").selectAll(".resize").style("display", null);
paulo@89:       d3.select("body").style("cursor", eventTarget.style("cursor"));
paulo@89:       event_({
paulo@89:         type: "brushstart"
paulo@89:       });
paulo@89:       brushmove();
paulo@89:       function keydown() {
paulo@89:         if (d3.event.keyCode == 32) {
paulo@89:           if (!dragging) {
paulo@89:             center = null;
paulo@89:             origin[0] -= xExtent[1];
paulo@89:             origin[1] -= yExtent[1];
paulo@89:             dragging = 2;
paulo@89:           }
paulo@89:           d3_eventPreventDefault();
paulo@89:         }
paulo@89:       }
paulo@89:       function keyup() {
paulo@89:         if (d3.event.keyCode == 32 && dragging == 2) {
paulo@89:           origin[0] += xExtent[1];
paulo@89:           origin[1] += yExtent[1];
paulo@89:           dragging = 0;
paulo@89:           d3_eventPreventDefault();
paulo@89:         }
paulo@89:       }
paulo@89:       function brushmove() {
paulo@89:         var point = d3.mouse(target), moved = false;
paulo@89:         if (offset) {
paulo@89:           point[0] += offset[0];
paulo@89:           point[1] += offset[1];
paulo@89:         }
paulo@89:         if (!dragging) {
paulo@89:           if (d3.event.altKey) {
paulo@89:             if (!center) center = [ (xExtent[0] + xExtent[1]) / 2, (yExtent[0] + yExtent[1]) / 2 ];
paulo@89:             origin[0] = xExtent[+(point[0] < center[0])];
paulo@89:             origin[1] = yExtent[+(point[1] < center[1])];
paulo@89:           } else center = null;
paulo@89:         }
paulo@89:         if (resizingX && move1(point, x, 0)) {
paulo@89:           redrawX(g);
paulo@89:           moved = true;
paulo@89:         }
paulo@89:         if (resizingY && move1(point, y, 1)) {
paulo@89:           redrawY(g);
paulo@89:           moved = true;
paulo@89:         }
paulo@89:         if (moved) {
paulo@89:           redraw(g);
paulo@89:           event_({
paulo@89:             type: "brush",
paulo@89:             mode: dragging ? "move" : "resize"
paulo@89:           });
paulo@89:         }
paulo@89:       }
paulo@89:       function move1(point, scale, i) {
paulo@89:         var range = d3_scaleRange(scale), r0 = range[0], r1 = range[1], position = origin[i], extent = i ? yExtent : xExtent, size = extent[1] - extent[0], min, max;
paulo@89:         if (dragging) {
paulo@89:           r0 -= position;
paulo@89:           r1 -= size + position;
paulo@89:         }
paulo@89:         min = (i ? yClamp : xClamp) ? Math.max(r0, Math.min(r1, point[i])) : point[i];
paulo@89:         if (dragging) {
paulo@89:           max = (min += position) + size;
paulo@89:         } else {
paulo@89:           if (center) position = Math.max(r0, Math.min(r1, 2 * center[i] - min));
paulo@89:           if (position < min) {
paulo@89:             max = min;
paulo@89:             min = position;
paulo@89:           } else {
paulo@89:             max = position;
paulo@89:           }
paulo@89:         }
paulo@89:         if (extent[0] != min || extent[1] != max) {
paulo@89:           if (i) yExtentDomain = null; else xExtentDomain = null;
paulo@89:           extent[0] = min;
paulo@89:           extent[1] = max;
paulo@89:           return true;
paulo@89:         }
paulo@89:       }
paulo@89:       function brushend() {
paulo@89:         brushmove();
paulo@89:         g.style("pointer-events", "all").selectAll(".resize").style("display", brush.empty() ? "none" : null);
paulo@89:         d3.select("body").style("cursor", null);
paulo@89:         w.on("mousemove.brush", null).on("mouseup.brush", null).on("touchmove.brush", null).on("touchend.brush", null).on("keydown.brush", null).on("keyup.brush", null);
paulo@89:         dragRestore();
paulo@89:         event_({
paulo@89:           type: "brushend"
paulo@89:         });
paulo@89:       }
paulo@89:     }
paulo@89:     brush.x = function(z) {
paulo@89:       if (!arguments.length) return x;
paulo@89:       x = z;
paulo@89:       resizes = d3_svg_brushResizes[!x << 1 | !y];
paulo@89:       return brush;
paulo@89:     };
paulo@89:     brush.y = function(z) {
paulo@89:       if (!arguments.length) return y;
paulo@89:       y = z;
paulo@89:       resizes = d3_svg_brushResizes[!x << 1 | !y];
paulo@89:       return brush;
paulo@89:     };
paulo@89:     brush.clamp = function(z) {
paulo@89:       if (!arguments.length) return x && y ? [ xClamp, yClamp ] : x ? xClamp : y ? yClamp : null;
paulo@89:       if (x && y) xClamp = !!z[0], yClamp = !!z[1]; else if (x) xClamp = !!z; else if (y) yClamp = !!z;
paulo@89:       return brush;
paulo@89:     };
paulo@89:     brush.extent = function(z) {
paulo@89:       var x0, x1, y0, y1, t;
paulo@89:       if (!arguments.length) {
paulo@89:         if (x) {
paulo@89:           if (xExtentDomain) {
paulo@89:             x0 = xExtentDomain[0], x1 = xExtentDomain[1];
paulo@89:           } else {
paulo@89:             x0 = xExtent[0], x1 = xExtent[1];
paulo@89:             if (x.invert) x0 = x.invert(x0), x1 = x.invert(x1);
paulo@89:             if (x1 < x0) t = x0, x0 = x1, x1 = t;
paulo@89:           }
paulo@89:         }
paulo@89:         if (y) {
paulo@89:           if (yExtentDomain) {
paulo@89:             y0 = yExtentDomain[0], y1 = yExtentDomain[1];
paulo@89:           } else {
paulo@89:             y0 = yExtent[0], y1 = yExtent[1];
paulo@89:             if (y.invert) y0 = y.invert(y0), y1 = y.invert(y1);
paulo@89:             if (y1 < y0) t = y0, y0 = y1, y1 = t;
paulo@89:           }
paulo@89:         }
paulo@89:         return x && y ? [ [ x0, y0 ], [ x1, y1 ] ] : x ? [ x0, x1 ] : y && [ y0, y1 ];
paulo@89:       }
paulo@89:       if (x) {
paulo@89:         x0 = z[0], x1 = z[1];
paulo@89:         if (y) x0 = x0[0], x1 = x1[0];
paulo@89:         xExtentDomain = [ x0, x1 ];
paulo@89:         if (x.invert) x0 = x(x0), x1 = x(x1);
paulo@89:         if (x1 < x0) t = x0, x0 = x1, x1 = t;
paulo@89:         if (x0 != xExtent[0] || x1 != xExtent[1]) xExtent = [ x0, x1 ];
paulo@89:       }
paulo@89:       if (y) {
paulo@89:         y0 = z[0], y1 = z[1];
paulo@89:         if (x) y0 = y0[1], y1 = y1[1];
paulo@89:         yExtentDomain = [ y0, y1 ];
paulo@89:         if (y.invert) y0 = y(y0), y1 = y(y1);
paulo@89:         if (y1 < y0) t = y0, y0 = y1, y1 = t;
paulo@89:         if (y0 != yExtent[0] || y1 != yExtent[1]) yExtent = [ y0, y1 ];
paulo@89:       }
paulo@89:       return brush;
paulo@89:     };
paulo@89:     brush.clear = function() {
paulo@89:       if (!brush.empty()) {
paulo@89:         xExtent = [ 0, 0 ], yExtent = [ 0, 0 ];
paulo@89:         xExtentDomain = yExtentDomain = null;
paulo@89:       }
paulo@89:       return brush;
paulo@89:     };
paulo@89:     brush.empty = function() {
paulo@89:       return !!x && xExtent[0] == xExtent[1] || !!y && yExtent[0] == yExtent[1];
paulo@89:     };
paulo@89:     return d3.rebind(brush, event, "on");
paulo@89:   };
paulo@89:   var d3_svg_brushCursor = {
paulo@89:     n: "ns-resize",
paulo@89:     e: "ew-resize",
paulo@89:     s: "ns-resize",
paulo@89:     w: "ew-resize",
paulo@89:     nw: "nwse-resize",
paulo@89:     ne: "nesw-resize",
paulo@89:     se: "nwse-resize",
paulo@89:     sw: "nesw-resize"
paulo@89:   };
paulo@89:   var d3_svg_brushResizes = [ [ "n", "e", "s", "w", "nw", "ne", "se", "sw" ], [ "e", "w" ], [ "n", "s" ], [] ];
paulo@89:   var d3_time_format = d3_time.format = d3_locale_enUS.timeFormat;
paulo@89:   var d3_time_formatUtc = d3_time_format.utc;
paulo@89:   var d3_time_formatIso = d3_time_formatUtc("%Y-%m-%dT%H:%M:%S.%LZ");
paulo@89:   d3_time_format.iso = Date.prototype.toISOString && +new Date("2000-01-01T00:00:00.000Z") ? d3_time_formatIsoNative : d3_time_formatIso;
paulo@89:   function d3_time_formatIsoNative(date) {
paulo@89:     return date.toISOString();
paulo@89:   }
paulo@89:   d3_time_formatIsoNative.parse = function(string) {
paulo@89:     var date = new Date(string);
paulo@89:     return isNaN(date) ? null : date;
paulo@89:   };
paulo@89:   d3_time_formatIsoNative.toString = d3_time_formatIso.toString;
paulo@89:   d3_time.second = d3_time_interval(function(date) {
paulo@89:     return new d3_date(Math.floor(date / 1e3) * 1e3);
paulo@89:   }, function(date, offset) {
paulo@89:     date.setTime(date.getTime() + Math.floor(offset) * 1e3);
paulo@89:   }, function(date) {
paulo@89:     return date.getSeconds();
paulo@89:   });
paulo@89:   d3_time.seconds = d3_time.second.range;
paulo@89:   d3_time.seconds.utc = d3_time.second.utc.range;
paulo@89:   d3_time.minute = d3_time_interval(function(date) {
paulo@89:     return new d3_date(Math.floor(date / 6e4) * 6e4);
paulo@89:   }, function(date, offset) {
paulo@89:     date.setTime(date.getTime() + Math.floor(offset) * 6e4);
paulo@89:   }, function(date) {
paulo@89:     return date.getMinutes();
paulo@89:   });
paulo@89:   d3_time.minutes = d3_time.minute.range;
paulo@89:   d3_time.minutes.utc = d3_time.minute.utc.range;
paulo@89:   d3_time.hour = d3_time_interval(function(date) {
paulo@89:     var timezone = date.getTimezoneOffset() / 60;
paulo@89:     return new d3_date((Math.floor(date / 36e5 - timezone) + timezone) * 36e5);
paulo@89:   }, function(date, offset) {
paulo@89:     date.setTime(date.getTime() + Math.floor(offset) * 36e5);
paulo@89:   }, function(date) {
paulo@89:     return date.getHours();
paulo@89:   });
paulo@89:   d3_time.hours = d3_time.hour.range;
paulo@89:   d3_time.hours.utc = d3_time.hour.utc.range;
paulo@89:   d3_time.month = d3_time_interval(function(date) {
paulo@89:     date = d3_time.day(date);
paulo@89:     date.setDate(1);
paulo@89:     return date;
paulo@89:   }, function(date, offset) {
paulo@89:     date.setMonth(date.getMonth() + offset);
paulo@89:   }, function(date) {
paulo@89:     return date.getMonth();
paulo@89:   });
paulo@89:   d3_time.months = d3_time.month.range;
paulo@89:   d3_time.months.utc = d3_time.month.utc.range;
paulo@89:   function d3_time_scale(linear, methods, format) {
paulo@89:     function scale(x) {
paulo@89:       return linear(x);
paulo@89:     }
paulo@89:     scale.invert = function(x) {
paulo@89:       return d3_time_scaleDate(linear.invert(x));
paulo@89:     };
paulo@89:     scale.domain = function(x) {
paulo@89:       if (!arguments.length) return linear.domain().map(d3_time_scaleDate);
paulo@89:       linear.domain(x);
paulo@89:       return scale;
paulo@89:     };
paulo@89:     function tickMethod(extent, count) {
paulo@89:       var span = extent[1] - extent[0], target = span / count, i = d3.bisect(d3_time_scaleSteps, target);
paulo@89:       return i == d3_time_scaleSteps.length ? [ methods.year, d3_scale_linearTickRange(extent.map(function(d) {
paulo@89:         return d / 31536e6;
paulo@89:       }), count)[2] ] : !i ? [ d3_time_scaleMilliseconds, d3_scale_linearTickRange(extent, count)[2] ] : methods[target / d3_time_scaleSteps[i - 1] < d3_time_scaleSteps[i] / target ? i - 1 : i];
paulo@89:     }
paulo@89:     scale.nice = function(interval, skip) {
paulo@89:       var domain = scale.domain(), extent = d3_scaleExtent(domain), method = interval == null ? tickMethod(extent, 10) : typeof interval === "number" && tickMethod(extent, interval);
paulo@89:       if (method) interval = method[0], skip = method[1];
paulo@89:       function skipped(date) {
paulo@89:         return !isNaN(date) && !interval.range(date, d3_time_scaleDate(+date + 1), skip).length;
paulo@89:       }
paulo@89:       return scale.domain(d3_scale_nice(domain, skip > 1 ? {
paulo@89:         floor: function(date) {
paulo@89:           while (skipped(date = interval.floor(date))) date = d3_time_scaleDate(date - 1);
paulo@89:           return date;
paulo@89:         },
paulo@89:         ceil: function(date) {
paulo@89:           while (skipped(date = interval.ceil(date))) date = d3_time_scaleDate(+date + 1);
paulo@89:           return date;
paulo@89:         }
paulo@89:       } : interval));
paulo@89:     };
paulo@89:     scale.ticks = function(interval, skip) {
paulo@89:       var extent = d3_scaleExtent(scale.domain()), method = interval == null ? tickMethod(extent, 10) : typeof interval === "number" ? tickMethod(extent, interval) : !interval.range && [ {
paulo@89:         range: interval
paulo@89:       }, skip ];
paulo@89:       if (method) interval = method[0], skip = method[1];
paulo@89:       return interval.range(extent[0], d3_time_scaleDate(+extent[1] + 1), skip < 1 ? 1 : skip);
paulo@89:     };
paulo@89:     scale.tickFormat = function() {
paulo@89:       return format;
paulo@89:     };
paulo@89:     scale.copy = function() {
paulo@89:       return d3_time_scale(linear.copy(), methods, format);
paulo@89:     };
paulo@89:     return d3_scale_linearRebind(scale, linear);
paulo@89:   }
paulo@89:   function d3_time_scaleDate(t) {
paulo@89:     return new Date(t);
paulo@89:   }
paulo@89:   var d3_time_scaleSteps = [ 1e3, 5e3, 15e3, 3e4, 6e4, 3e5, 9e5, 18e5, 36e5, 108e5, 216e5, 432e5, 864e5, 1728e5, 6048e5, 2592e6, 7776e6, 31536e6 ];
paulo@89:   var d3_time_scaleLocalMethods = [ [ d3_time.second, 1 ], [ d3_time.second, 5 ], [ d3_time.second, 15 ], [ d3_time.second, 30 ], [ d3_time.minute, 1 ], [ d3_time.minute, 5 ], [ d3_time.minute, 15 ], [ d3_time.minute, 30 ], [ d3_time.hour, 1 ], [ d3_time.hour, 3 ], [ d3_time.hour, 6 ], [ d3_time.hour, 12 ], [ d3_time.day, 1 ], [ d3_time.day, 2 ], [ d3_time.week, 1 ], [ d3_time.month, 1 ], [ d3_time.month, 3 ], [ d3_time.year, 1 ] ];
paulo@89:   var d3_time_scaleLocalFormat = d3_time_format.multi([ [ ".%L", function(d) {
paulo@89:     return d.getMilliseconds();
paulo@89:   } ], [ ":%S", function(d) {
paulo@89:     return d.getSeconds();
paulo@89:   } ], [ "%I:%M", function(d) {
paulo@89:     return d.getMinutes();
paulo@89:   } ], [ "%I %p", function(d) {
paulo@89:     return d.getHours();
paulo@89:   } ], [ "%a %d", function(d) {
paulo@89:     return d.getDay() && d.getDate() != 1;
paulo@89:   } ], [ "%b %d", function(d) {
paulo@89:     return d.getDate() != 1;
paulo@89:   } ], [ "%B", function(d) {
paulo@89:     return d.getMonth();
paulo@89:   } ], [ "%Y", d3_true ] ]);
paulo@89:   var d3_time_scaleMilliseconds = {
paulo@89:     range: function(start, stop, step) {
paulo@89:       return d3.range(Math.ceil(start / step) * step, +stop, step).map(d3_time_scaleDate);
paulo@89:     },
paulo@89:     floor: d3_identity,
paulo@89:     ceil: d3_identity
paulo@89:   };
paulo@89:   d3_time_scaleLocalMethods.year = d3_time.year;
paulo@89:   d3_time.scale = function() {
paulo@89:     return d3_time_scale(d3.scale.linear(), d3_time_scaleLocalMethods, d3_time_scaleLocalFormat);
paulo@89:   };
paulo@89:   var d3_time_scaleUtcMethods = d3_time_scaleLocalMethods.map(function(m) {
paulo@89:     return [ m[0].utc, m[1] ];
paulo@89:   });
paulo@89:   var d3_time_scaleUtcFormat = d3_time_formatUtc.multi([ [ ".%L", function(d) {
paulo@89:     return d.getUTCMilliseconds();
paulo@89:   } ], [ ":%S", function(d) {
paulo@89:     return d.getUTCSeconds();
paulo@89:   } ], [ "%I:%M", function(d) {
paulo@89:     return d.getUTCMinutes();
paulo@89:   } ], [ "%I %p", function(d) {
paulo@89:     return d.getUTCHours();
paulo@89:   } ], [ "%a %d", function(d) {
paulo@89:     return d.getUTCDay() && d.getUTCDate() != 1;
paulo@89:   } ], [ "%b %d", function(d) {
paulo@89:     return d.getUTCDate() != 1;
paulo@89:   } ], [ "%B", function(d) {
paulo@89:     return d.getUTCMonth();
paulo@89:   } ], [ "%Y", d3_true ] ]);
paulo@89:   d3_time_scaleUtcMethods.year = d3_time.year.utc;
paulo@89:   d3_time.scale.utc = function() {
paulo@89:     return d3_time_scale(d3.scale.linear(), d3_time_scaleUtcMethods, d3_time_scaleUtcFormat);
paulo@89:   };
paulo@89:   d3.text = d3_xhrType(function(request) {
paulo@89:     return request.responseText;
paulo@89:   });
paulo@89:   d3.json = function(url, callback) {
paulo@89:     return d3_xhr(url, "application/json", d3_json, callback);
paulo@89:   };
paulo@89:   function d3_json(request) {
paulo@89:     return JSON.parse(request.responseText);
paulo@89:   }
paulo@89:   d3.html = function(url, callback) {
paulo@89:     return d3_xhr(url, "text/html", d3_html, callback);
paulo@89:   };
paulo@89:   function d3_html(request) {
paulo@89:     var range = d3_document.createRange();
paulo@89:     range.selectNode(d3_document.body);
paulo@89:     return range.createContextualFragment(request.responseText);
paulo@89:   }
paulo@89:   d3.xml = d3_xhrType(function(request) {
paulo@89:     return request.responseXML;
paulo@89:   });
paulo@89:   if (typeof define === "function" && define.amd) this.d3 = d3, define(d3); else if (typeof module === "object" && module.exports) module.exports = d3; else this.d3 = d3;
paulo@89: }();