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= require('eve'); // Copyright (c) 2017 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nvar mina = function (eve) {\n  var animations = {},\n      requestAnimFrame = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) {\n    setTimeout(callback, 16, new Date().getTime());\n    return true;\n  },\n      requestID,\n      isArray = Array.isArray || function (a) {\n    return a instanceof Array || Object.prototype.toString.call(a) == \"[object Array]\";\n  },\n      idgen = 0,\n      idprefix = \"M\" + (+new Date()).toString(36),\n      ID = function ID() {\n    return idprefix + (idgen++).toString(36);\n  },\n      diff = function diff(a, b, A, B) {\n    if (isArray(a)) {\n      res = [];\n\n      for (var i = 0, ii = a.length; i < ii; i++) {\n        res[i] = diff(a[i], b, A[i], B);\n      }\n\n      return res;\n    }\n\n    var dif = (A - a) / (B - b);\n    return function (bb) {\n      return a + dif * (bb - b);\n    };\n  },\n      timer = Date.now || function () {\n    return +new Date();\n  },\n      sta = function sta(val) {\n    var a = this;\n\n    if (val == null) {\n      return a.s;\n    }\n\n    var ds = a.s - val;\n    a.b += a.dur * ds;\n    a.B += a.dur * ds;\n    a.s = val;\n  },\n      speed = function speed(val) {\n    var a = this;\n\n    if (val == null) {\n      return a.spd;\n    }\n\n    a.spd = val;\n  },\n      duration = function duration(val) {\n    var a = this;\n\n    if (val == null) {\n      return a.dur;\n    }\n\n    a.s = a.s * val / a.dur;\n    a.dur = val;\n  },\n      stopit = function stopit() {\n    var a = this;\n    delete animations[a.id];\n    a.update();\n    eve(\"mina.stop.\" + a.id, a);\n  },\n      pause = function pause() {\n    var a = this;\n\n    if (a.pdif) {\n      return;\n    }\n\n    delete animations[a.id];\n    a.update();\n    a.pdif = a.get() - a.b;\n  },\n      resume = function resume() {\n    var a = this;\n\n    if (!a.pdif) {\n      return;\n    }\n\n    a.b = a.get() - a.pdif;\n    delete a.pdif;\n    animations[a.id] = a;\n    frame();\n  },\n      update = function update() {\n    var a = this,\n        res;\n\n    if (isArray(a.start)) {\n      res = [];\n\n      for (var j = 0, jj = a.start.length; j < jj; j++) {\n        res[j] = +a.start[j] + (a.end[j] - a.start[j]) * a.easing(a.s);\n      }\n    } else {\n      res = +a.start + (a.end - a.start) * a.easing(a.s);\n    }\n\n    a.set(res);\n  },\n      frame = function frame(timeStamp) {\n    // Manual invokation?\n    if (!timeStamp) {\n      // Frame loop stopped?\n      if (!requestID) {\n        // Start frame loop...\n        requestID = requestAnimFrame(frame);\n      }\n\n      return;\n    }\n\n    var len = 0;\n\n    for (var i in animations) {\n      if (animations.hasOwnProperty(i)) {\n        var a = animations[i],\n            b = a.get(),\n            res;\n        len++;\n        a.s = (b - a.b) / (a.dur / a.spd);\n\n        if (a.s >= 1) {\n          delete animations[i];\n          a.s = 1;\n          len--;\n\n          (function (a) {\n            setTimeout(function () {\n              eve(\"mina.finish.\" + a.id, a);\n            });\n          })(a);\n        }\n\n        a.update();\n      }\n    }\n\n    requestID = len ? requestAnimFrame(frame) : false;\n  },\n\n  /*\\\n   * mina\n   [ method ]\n   **\n   * Generic animation of numbers\n   **\n   - a (number) start _slave_ number\n   - A (number) end _slave_ number\n   - b (number) start _master_ number (start time in general case)\n   - B (number) end _master_ number (end time in general case)\n   - get (function) getter of _master_ number (see @mina.time)\n   - set (function) setter of _slave_ number\n   - easing (function) #optional easing function, default is @mina.linear\n   = (object) animation descriptor\n   o {\n   o         id (string) animation id,\n   o         start (number) start _slave_ number,\n   o         end (number) end _slave_ number,\n   o         b (number) start _master_ number,\n   o         s (number) animation status (0..1),\n   o         dur (number) animation duration,\n   o         spd (number) animation speed,\n   o         get (function) getter of _master_ number (see @mina.time),\n   o         set (function) setter of _slave_ number,\n   o         easing (function) easing function, default is @mina.linear,\n   o         status (function) status getter/setter,\n   o         speed (function) speed getter/setter,\n   o         duration (function) duration getter/setter,\n   o         stop (function) animation stopper\n   o         pause (function) pauses the animation\n   o         resume (function) resumes the animation\n   o         update (function) calles setter with the right value of the animation\n   o }\n  \\*/\n  mina = function mina(a, A, b, B, get, set, easing) {\n    var anim = {\n      id: ID(),\n      start: a,\n      end: A,\n      b: b,\n      s: 0,\n      dur: B - b,\n      spd: 1,\n      get: get,\n      set: set,\n      easing: easing || mina.linear,\n      status: sta,\n      speed: speed,\n      duration: duration,\n      stop: stopit,\n      pause: pause,\n      resume: resume,\n      update: update\n    };\n    animations[anim.id] = anim;\n    var len = 0,\n        i;\n\n    for (i in animations) {\n      if (animations.hasOwnProperty(i)) {\n        len++;\n\n        if (len == 2) {\n          break;\n        }\n      }\n    }\n\n    len == 1 && frame();\n    return anim;\n  };\n  /*\\\n   * mina.time\n   [ method ]\n   **\n   * Returns the current time. Equivalent to:\n   | function () {\n   |     return (new Date).getTime();\n   | }\n  \\*/\n\n\n  mina.time = timer;\n  /*\\\n   * mina.getById\n   [ method ]\n   **\n   * Returns an animation by its id\n   - id (string) animation's id\n   = (object) See @mina\n  \\*/\n\n  mina.getById = function (id) {\n    return animations[id] || null;\n  };\n  /*\\\n   * mina.linear\n   [ method ]\n   **\n   * Default linear easing\n   - n (number) input 0..1\n   = (number) output 0..1\n  \\*/\n\n\n  mina.linear = function (n) {\n    return n;\n  };\n  /*\\\n   * mina.easeout\n   [ method ]\n   **\n   * Easeout easing\n   - n (number) input 0..1\n   = (number) output 0..1\n  \\*/\n\n\n  mina.easeout = function (n) {\n    return Math.pow(n, 1.7);\n  };\n  /*\\\n   * mina.easein\n   [ method ]\n   **\n   * Easein easing\n   - n (number) input 0..1\n   = (number) output 0..1\n  \\*/\n\n\n  mina.easein = function (n) {\n    return Math.pow(n, .48);\n  };\n  /*\\\n   * mina.easeinout\n   [ method ]\n   **\n   * Easeinout easing\n   - n (number) input 0..1\n   = (number) output 0..1\n  \\*/\n\n\n  mina.easeinout = function (n) {\n    if (n == 1) {\n      return 1;\n    }\n\n    if (n == 0) {\n      return 0;\n    }\n\n    var q = .48 - n / 1.04,\n        Q = Math.sqrt(.1734 + q * q),\n        x = Q - q,\n        X = Math.pow(Math.abs(x), 1 / 3) * (x < 0 ? -1 : 1),\n        y = -Q - q,\n        Y = Math.pow(Math.abs(y), 1 / 3) * (y < 0 ? -1 : 1),\n        t = X + Y + .5;\n    return (1 - t) * 3 * t * t + t * t * t;\n  };\n  /*\\\n   * mina.backin\n   [ method ]\n   **\n   * Backin easing\n   - n (number) input 0..1\n   = (number) output 0..1\n  \\*/\n\n\n  mina.backin = function (n) {\n    if (n == 1) {\n      return 1;\n    }\n\n    var s = 1.70158;\n    return n * n * ((s + 1) * n - s);\n  };\n  /*\\\n   * mina.backout\n   [ method ]\n   **\n   * Backout easing\n   - n (number) input 0..1\n   = (number) output 0..1\n  \\*/\n\n\n  mina.backout = function (n) {\n    if (n == 0) {\n      return 0;\n    }\n\n    n = n - 1;\n    var s = 1.70158;\n    return n * n * ((s + 1) * n + s) + 1;\n  };\n  /*\\\n   * mina.elastic\n   [ method ]\n   **\n   * Elastic easing\n   - n (number) input 0..1\n   = (number) output 0..1\n  \\*/\n\n\n  mina.elastic = function (n) {\n    if (n == !!n) {\n      return n;\n    }\n\n    return Math.pow(2, -10 * n) * Math.sin((n - .075) * (2 * Math.PI) / .3) + 1;\n  };\n  /*\\\n   * mina.bounce\n   [ method ]\n   **\n   * Bounce easing\n   - n (number) input 0..1\n   = (number) output 0..1\n  \\*/\n\n\n  mina.bounce = function (n) {\n    var s = 7.5625,\n        p = 2.75,\n        l;\n\n    if (n < 1 / p) {\n      l = s * n * n;\n    } else {\n      if (n < 2 / p) {\n        n -= 1.5 / p;\n        l = s * n * n + .75;\n      } else {\n        if (n < 2.5 / p) {\n          n -= 2.25 / p;\n          l = s * n * n + .9375;\n        } else {\n          n -= 2.625 / p;\n          l = s * n * n + .984375;\n        }\n      }\n    }\n\n    return l;\n  };\n\n  window.mina = mina;\n  return mina;\n}(typeof eve == \"undefined\" ? function () {} : eve); // Copyright (c) 2013 - 2017 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\n\nvar Snap = function (root) {\n  Snap.version = \"0.5.1\";\n  /*\\\n   * Snap\n   [ method ]\n   **\n   * Creates a drawing surface or wraps existing SVG element.\n   **\n   - width (number|string) width of surface\n   - height (number|string) height of surface\n   * or\n   - DOM (SVGElement) element to be wrapped into Snap structure\n   * or\n   - array (array) array of elements (will return set of elements)\n   * or\n   - query (string) CSS query selector\n   = (object) @Element\n  \\*/\n\n  function Snap(w, h) {\n    if (w) {\n      if (w.nodeType) {\n        return wrap(w);\n      }\n\n      if (is(w, \"array\") && Snap.set) {\n        return Snap.set.apply(Snap, w);\n      }\n\n      if (w instanceof Element) {\n        return w;\n      }\n\n      if (h == null) {\n        try {\n          w = glob.doc.querySelector(String(w));\n          return wrap(w);\n        } catch (e) {\n          return null;\n        }\n      }\n    }\n\n    w = w == null ? \"100%\" : w;\n    h = h == null ? \"100%\" : h;\n    return new Paper(w, h);\n  }\n\n  Snap.toString = function () {\n    return \"Snap v\" + this.version;\n  };\n\n  Snap._ = {};\n  var glob = {\n    win: root.window,\n    doc: root.window.document\n  };\n  Snap._.glob = glob;\n\n  var has = \"hasOwnProperty\",\n      Str = String,\n      toFloat = parseFloat,\n      toInt = parseInt,\n      math = Math,\n      mmax = math.max,\n      mmin = math.min,\n      abs = math.abs,\n      pow = math.pow,\n      PI = math.PI,\n      round = math.round,\n      E = \"\",\n      S = \" \",\n      objectToString = Object.prototype.toString,\n      ISURL = /^url\\(['\"]?([^\\)]+?)['\"]?\\)$/i,\n      colourRegExp = /^\\s*((#[a-f\\d]{6})|(#[a-f\\d]{3})|rgba?\\(\\s*([\\d\\.]+%?\\s*,\\s*[\\d\\.]+%?\\s*,\\s*[\\d\\.]+%?(?:\\s*,\\s*[\\d\\.]+%?)?)\\s*\\)|hsba?\\(\\s*([\\d\\.]+(?:deg|\\xb0|%)?\\s*,\\s*[\\d\\.]+%?\\s*,\\s*[\\d\\.]+(?:%?\\s*,\\s*[\\d\\.]+)?%?)\\s*\\)|hsla?\\(\\s*([\\d\\.]+(?:deg|\\xb0|%)?\\s*,\\s*[\\d\\.]+%?\\s*,\\s*[\\d\\.]+(?:%?\\s*,\\s*[\\d\\.]+)?%?)\\s*\\))\\s*$/i,\n      bezierrg = /^(?:cubic-)?bezier\\(([^,]+),([^,]+),([^,]+),([^\\)]+)\\)/,\n      separator = Snap._.separator = /[,\\s]+/,\n      whitespace = /[\\s]/g,\n      commaSpaces = /[\\s]*,[\\s]*/,\n      hsrg = {\n    hs: 1,\n    rg: 1\n  },\n      pathCommand = /([a-z])[\\s,]*((-?\\d*\\.?\\d*(?:e[\\-+]?\\d+)?[\\s]*,?[\\s]*)+)/ig,\n      tCommand = /([rstm])[\\s,]*((-?\\d*\\.?\\d*(?:e[\\-+]?\\d+)?[\\s]*,?[\\s]*)+)/ig,\n      pathValues = /(-?\\d*\\.?\\d*(?:e[\\-+]?\\d+)?)[\\s]*,?[\\s]*/ig,\n      idgen = 0,\n      idprefix = \"S\" + (+new Date()).toString(36),\n      ID = function ID(el) {\n    return (el && el.type ? el.type : E) + idprefix + (idgen++).toString(36);\n  },\n      xlink = \"http://www.w3.org/1999/xlink\",\n      xmlns = \"http://www.w3.org/2000/svg\",\n      hub = {},\n\n  /*\\\n   * Snap.url\n   [ method ]\n   **\n   * Wraps path into `\"url('<path>')\"`.\n   - value (string) path\n   = (string) wrapped path\n  \\*/\n  URL = Snap.url = function (url) {\n    return \"url('#\" + url + \"')\";\n  };\n\n  function $(el, attr) {\n    if (attr) {\n      if (el == \"#text\") {\n        el = glob.doc.createTextNode(attr.text || attr[\"#text\"] || \"\");\n      }\n\n      if (el == \"#comment\") {\n        el = glob.doc.createComment(attr.text || attr[\"#text\"] || \"\");\n      }\n\n      if (typeof el == \"string\") {\n        el = $(el);\n      }\n\n      if (typeof attr == \"string\") {\n        if (el.nodeType == 1) {\n          if (attr.substring(0, 6) == \"xlink:\") {\n            return el.getAttributeNS(xlink, attr.substring(6));\n          }\n\n          if (attr.substring(0, 4) == \"xml:\") {\n            return el.getAttributeNS(xmlns, attr.substring(4));\n          }\n\n          return el.getAttribute(attr);\n        } else if (attr == \"text\") {\n          return el.nodeValue;\n        } else {\n          return null;\n        }\n      }\n\n      if (el.nodeType == 1) {\n        for (var key in attr) {\n          if (attr[has](key)) {\n            var val = Str(attr[key]);\n\n            if (val) {\n              if (key.substring(0, 6) == \"xlink:\") {\n                el.setAttributeNS(xlink, key.substring(6), val);\n              } else if (key.substring(0, 4) == \"xml:\") {\n                el.setAttributeNS(xmlns, key.substring(4), val);\n              } else {\n                el.setAttribute(key, val);\n              }\n            } else {\n              el.removeAttribute(key);\n            }\n          }\n        }\n      } else if (\"text\" in attr) {\n        el.nodeValue = attr.text;\n      }\n    } else {\n      el = glob.doc.createElementNS(xmlns, el);\n    }\n\n    return el;\n  }\n\n  Snap._.$ = $;\n  Snap._.id = ID;\n\n  function getAttrs(el) {\n    var attrs = el.attributes,\n        name,\n        out = {};\n\n    for (var i = 0; i < attrs.length; i++) {\n      if (attrs[i].namespaceURI == xlink) {\n        name = \"xlink:\";\n      } else {\n        name = \"\";\n      }\n\n      name += attrs[i].name;\n      out[name] = attrs[i].textContent;\n    }\n\n    return out;\n  }\n\n  function is(o, type) {\n    type = Str.prototype.toLowerCase.call(type);\n\n    if (type == \"finite\") {\n      return isFinite(o);\n    }\n\n    if (type == \"array\" && (o instanceof Array || Array.isArray && Array.isArray(o))) {\n      return true;\n    }\n\n    return type == \"null\" && o === null || type == typeof o && o !== null || type == \"object\" && o === Object(o) || objectToString.call(o).slice(8, -1).toLowerCase() == type;\n  }\n  /*\\\n   * Snap.format\n   [ method ]\n   **\n   * Replaces construction of type `{<name>}` to the corresponding argument\n   **\n   - token (string) string to format\n   - json (object) object which properties are used as a replacement\n   = (string) formatted string\n   > Usage\n   | // this draws a rectangular shape equivalent to \"M10,20h40v50h-40z\"\n   | paper.path(Snap.format(\"M{x},{y}h{dim.width}v{dim.height}h{dim['negative width']}z\", {\n   |     x: 10,\n   |     y: 20,\n   |     dim: {\n   |         width: 40,\n   |         height: 50,\n   |         \"negative width\": -40\n   |     }\n   | }));\n  \\*/\n\n\n  Snap.format = function () {\n    var tokenRegex = /\\{([^\\}]+)\\}/g,\n        objNotationRegex = /(?:(?:^|\\.)(.+?)(?=\\[|\\.|$|\\()|\\[('|\")(.+?)\\2\\])(\\(\\))?/g,\n        // matches .xxxxx or [\"xxxxx\"] to run over object properties\n    replacer = function replacer(all, key, obj) {\n      var res = obj;\n      key.replace(objNotationRegex, function (all, name, quote, quotedName, isFunc) {\n        name = name || quotedName;\n\n        if (res) {\n          if (name in res) {\n            res = res[name];\n          }\n\n          typeof res == \"function\" && isFunc && (res = res());\n        }\n      });\n      res = (res == null || res == obj ? all : res) + \"\";\n      return res;\n    };\n\n    return function (str, obj) {\n      return Str(str).replace(tokenRegex, function (all, key) {\n        return replacer(all, key, obj);\n      });\n    };\n  }();\n\n  function clone(obj) {\n    if (typeof obj == \"function\" || Object(obj) !== obj) {\n      return obj;\n    }\n\n    var res = new obj.constructor();\n\n    for (var key in obj) {\n      if (obj[has](key)) {\n        res[key] = clone(obj[key]);\n      }\n    }\n\n    return res;\n  }\n\n  Snap._.clone = clone;\n\n  function repush(array, item) {\n    for (var i = 0, ii = array.length; i < ii; i++) {\n      if (array[i] === item) {\n        return array.push(array.splice(i, 1)[0]);\n      }\n    }\n  }\n\n  function cacher(f, scope, postprocessor) {\n    function newf() {\n      var arg = Array.prototype.slice.call(arguments, 0),\n          args = arg.join(\"\\u2400\"),\n          cache = newf.cache = newf.cache || {},\n          count = newf.count = newf.count || [];\n\n      if (cache[has](args)) {\n        repush(count, args);\n        return postprocessor ? postprocessor(cache[args]) : cache[args];\n      }\n\n      count.length >= 1e3 && delete cache[count.shift()];\n      count.push(args);\n      cache[args] = f.apply(scope, arg);\n      return postprocessor ? postprocessor(cache[args]) : cache[args];\n    }\n\n    return newf;\n  }\n\n  Snap._.cacher = cacher;\n\n  function angle(x1, y1, x2, y2, x3, y3) {\n    if (x3 == null) {\n      var x = x1 - x2,\n          y = y1 - y2;\n\n      if (!x && !y) {\n        return 0;\n      }\n\n      return (180 + math.atan2(-y, -x) * 180 / PI + 360) % 360;\n    } else {\n      return angle(x1, y1, x3, y3) - angle(x2, y2, x3, y3);\n    }\n  }\n\n  function rad(deg) {\n    return deg % 360 * PI / 180;\n  }\n\n  function deg(rad) {\n    return rad * 180 / PI % 360;\n  }\n\n  function x_y() {\n    return this.x + S + this.y;\n  }\n\n  function x_y_w_h() {\n    return this.x + S + this.y + S + this.width + \" \\xd7 \" + this.height;\n  }\n  /*\\\n   * Snap.rad\n   [ method ]\n   **\n   * Transform angle to radians\n   - deg (number) angle in degrees\n   = (number) angle in radians\n  \\*/\n\n\n  Snap.rad = rad;\n  /*\\\n   * Snap.deg\n   [ method ]\n   **\n   * Transform angle to degrees\n   - rad (number) angle in radians\n   = (number) angle in degrees\n  \\*/\n\n  Snap.deg = deg;\n  /*\\\n   * Snap.sin\n   [ method ]\n   **\n   * Equivalent to `Math.sin()` only works with degrees, not radians.\n   - angle (number) angle in degrees\n   = (number) sin\n  \\*/\n\n  Snap.sin = function (angle) {\n    return math.sin(Snap.rad(angle));\n  };\n  /*\\\n   * Snap.tan\n   [ method ]\n   **\n   * Equivalent to `Math.tan()` only works with degrees, not radians.\n   - angle (number) angle in degrees\n   = (number) tan\n  \\*/\n\n\n  Snap.tan = function (angle) {\n    return math.tan(Snap.rad(angle));\n  };\n  /*\\\n   * Snap.cos\n   [ method ]\n   **\n   * Equivalent to `Math.cos()` only works with degrees, not radians.\n   - angle (number) angle in degrees\n   = (number) cos\n  \\*/\n\n\n  Snap.cos = function (angle) {\n    return math.cos(Snap.rad(angle));\n  };\n  /*\\\n   * Snap.asin\n   [ method ]\n   **\n   * Equivalent to `Math.asin()` only works with degrees, not radians.\n   - num (number) value\n   = (number) asin in degrees\n  \\*/\n\n\n  Snap.asin = function (num) {\n    return Snap.deg(math.asin(num));\n  };\n  /*\\\n   * Snap.acos\n   [ method ]\n   **\n   * Equivalent to `Math.acos()` only works with degrees, not radians.\n   - num (number) value\n   = (number) acos in degrees\n  \\*/\n\n\n  Snap.acos = function (num) {\n    return Snap.deg(math.acos(num));\n  };\n  /*\\\n   * Snap.atan\n   [ method ]\n   **\n   * Equivalent to `Math.atan()` only works with degrees, not radians.\n   - num (number) value\n   = (number) atan in degrees\n  \\*/\n\n\n  Snap.atan = function (num) {\n    return Snap.deg(math.atan(num));\n  };\n  /*\\\n   * Snap.atan2\n   [ method ]\n   **\n   * Equivalent to `Math.atan2()` only works with degrees, not radians.\n   - num (number) value\n   = (number) atan2 in degrees\n  \\*/\n\n\n  Snap.atan2 = function (num) {\n    return Snap.deg(math.atan2(num));\n  };\n  /*\\\n   * Snap.angle\n   [ method ]\n   **\n   * Returns an angle between two or three points\n   - x1 (number) x coord of first point\n   - y1 (number) y coord of first point\n   - x2 (number) x coord of second point\n   - y2 (number) y coord of second point\n   - x3 (number) #optional x coord of third point\n   - y3 (number) #optional y coord of third point\n   = (number) angle in degrees\n  \\*/\n\n\n  Snap.angle = angle;\n  /*\\\n   * Snap.len\n   [ method ]\n   **\n   * Returns distance between two points\n   - x1 (number) x coord of first point\n   - y1 (number) y coord of first point\n   - x2 (number) x coord of second point\n   - y2 (number) y coord of second point\n   = (number) distance\n  \\*/\n\n  Snap.len = function (x1, y1, x2, y2) {\n    return Math.sqrt(Snap.len2(x1, y1, x2, y2));\n  };\n  /*\\\n   * Snap.len2\n   [ method ]\n   **\n   * Returns squared distance between two points\n   - x1 (number) x coord of first point\n   - y1 (number) y coord of first point\n   - x2 (number) x coord of second point\n   - y2 (number) y coord of second point\n   = (number) distance\n  \\*/\n\n\n  Snap.len2 = function (x1, y1, x2, y2) {\n    return (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2);\n  };\n  /*\\\n   * Snap.closestPoint\n   [ method ]\n   **\n   * Returns closest point to a given one on a given path.\n   - path (Element) path element\n   - x (number) x coord of a point\n   - y (number) y coord of a point\n   = (object) in format\n   {\n      x (number) x coord of the point on the path\n      y (number) y coord of the point on the path\n      length (number) length of the path to the point\n      distance (number) distance from the given point to the path\n   }\n  \\*/\n  // Copied from http://bl.ocks.org/mbostock/8027637\n\n\n  Snap.closestPoint = function (path, x, y) {\n    function distance2(p) {\n      var dx = p.x - x,\n          dy = p.y - y;\n      return dx * dx + dy * dy;\n    }\n\n    var pathNode = path.node,\n        pathLength = pathNode.getTotalLength(),\n        precision = pathLength / pathNode.pathSegList.numberOfItems * .125,\n        best,\n        bestLength,\n        bestDistance = Infinity; // linear scan for coarse approximation\n\n    for (var scan, scanLength = 0, scanDistance; scanLength <= pathLength; scanLength += precision) {\n      if ((scanDistance = distance2(scan = pathNode.getPointAtLength(scanLength))) < bestDistance) {\n        best = scan;\n        bestLength = scanLength;\n        bestDistance = scanDistance;\n      }\n    } // binary search for precise estimate\n\n\n    precision *= .5;\n\n    while (precision > .5) {\n      var before, after, beforeLength, afterLength, beforeDistance, afterDistance;\n\n      if ((beforeLength = bestLength - precision) >= 0 && (beforeDistance = distance2(before = pathNode.getPointAtLength(beforeLength))) < bestDistance) {\n        best = before;\n        bestLength = beforeLength;\n        bestDistance = beforeDistance;\n      } else if ((afterLength = bestLength + precision) <= pathLength && (afterDistance = distance2(after = pathNode.getPointAtLength(afterLength))) < bestDistance) {\n        best = after;\n        bestLength = afterLength;\n        bestDistance = afterDistance;\n      } else {\n        precision *= .5;\n      }\n    }\n\n    best = {\n      x: best.x,\n      y: best.y,\n      length: bestLength,\n      distance: Math.sqrt(bestDistance)\n    };\n    return best;\n  };\n  /*\\\n   * Snap.is\n   [ method ]\n   **\n   * Handy replacement for the `typeof` operator\n   - o (…) any object or primitive\n   - type (string) name of the type, e.g., `string`, `function`, `number`, etc.\n   = (boolean) `true` if given value is of given type\n  \\*/\n\n\n  Snap.is = is;\n  /*\\\n   * Snap.snapTo\n   [ method ]\n   **\n   * Snaps given value to given grid\n   - values (array|number) given array of values or step of the grid\n   - value (number) value to adjust\n   - tolerance (number) #optional maximum distance to the target value that would trigger the snap. Default is `10`.\n   = (number) adjusted value\n  \\*/\n\n  Snap.snapTo = function (values, value, tolerance) {\n    tolerance = is(tolerance, \"finite\") ? tolerance : 10;\n\n    if (is(values, \"array\")) {\n      var i = values.length;\n\n      while (i--) {\n        if (abs(values[i] - value) <= tolerance) {\n          return values[i];\n        }\n      }\n    } else {\n      values = +values;\n      var rem = value % values;\n\n      if (rem < tolerance) {\n        return value - rem;\n      }\n\n      if (rem > values - tolerance) {\n        return value - rem + values;\n      }\n    }\n\n    return value;\n  }; // Colour\n\n  /*\\\n   * Snap.getRGB\n   [ method ]\n   **\n   * Parses color string as RGB object\n   - color (string) color string in one of the following formats:\n   # <ul>\n   #     <li>Color name (<code>red</code>, <code>green</code>, <code>cornflowerblue</code>, etc)</li>\n   #     <li>#••• — shortened HTML color: (<code>#000</code>, <code>#fc0</code>, etc.)</li>\n   #     <li>#•••••• — full length HTML color: (<code>#000000</code>, <code>#bd2300</code>)</li>\n   #     <li>rgb(•••, •••, •••) — red, green and blue channels values: (<code>rgb(200,&nbsp;100,&nbsp;0)</code>)</li>\n   #     <li>rgba(•••, •••, •••, •••) — also with opacity</li>\n   #     <li>rgb(•••%, •••%, •••%) — same as above, but in %: (<code>rgb(100%,&nbsp;175%,&nbsp;0%)</code>)</li>\n   #     <li>rgba(•••%, •••%, •••%, •••%) — also with opacity</li>\n   #     <li>hsb(•••, •••, •••) — hue, saturation and brightness values: (<code>hsb(0.5,&nbsp;0.25,&nbsp;1)</code>)</li>\n   #     <li>hsba(•••, •••, •••, •••) — also with opacity</li>\n   #     <li>hsb(•••%, •••%, •••%) — same as above, but in %</li>\n   #     <li>hsba(•••%, •••%, •••%, •••%) — also with opacity</li>\n   #     <li>hsl(•••, •••, •••) — hue, saturation and luminosity values: (<code>hsb(0.5,&nbsp;0.25,&nbsp;0.5)</code>)</li>\n   #     <li>hsla(•••, •••, •••, •••) — also with opacity</li>\n   #     <li>hsl(•••%, •••%, •••%) — same as above, but in %</li>\n   #     <li>hsla(•••%, •••%, •••%, •••%) — also with opacity</li>\n   # </ul>\n   * Note that `%` can be used any time: `rgb(20%, 255, 50%)`.\n   = (object) RGB object in the following format:\n   o {\n   o     r (number) red,\n   o     g (number) green,\n   o     b (number) blue,\n   o     hex (string) color in HTML/CSS format: #••••••,\n   o     error (boolean) true if string can't be parsed\n   o }\n  \\*/\n\n\n  Snap.getRGB = cacher(function (colour) {\n    if (!colour || !!((colour = Str(colour)).indexOf(\"-\") + 1)) {\n      return {\n        r: -1,\n        g: -1,\n        b: -1,\n        hex: \"none\",\n        error: 1,\n        toString: rgbtoString\n      };\n    }\n\n    if (colour == \"none\") {\n      return {\n        r: -1,\n        g: -1,\n        b: -1,\n        hex: \"none\",\n        toString: rgbtoString\n      };\n    }\n\n    !(hsrg[has](colour.toLowerCase().substring(0, 2)) || colour.charAt() == \"#\") && (colour = _toHex(colour));\n\n    if (!colour) {\n      return {\n        r: -1,\n        g: -1,\n        b: -1,\n        hex: \"none\",\n        error: 1,\n        toString: rgbtoString\n      };\n    }\n\n    var res,\n        red,\n        green,\n        blue,\n        opacity,\n        t,\n        values,\n        rgb = colour.match(colourRegExp);\n\n    if (rgb) {\n      if (rgb[2]) {\n        blue = toInt(rgb[2].substring(5), 16);\n        green = toInt(rgb[2].substring(3, 5), 16);\n        red = toInt(rgb[2].substring(1, 3), 16);\n      }\n\n      if (rgb[3]) {\n        blue = toInt((t = rgb[3].charAt(3)) + t, 16);\n        green = toInt((t = rgb[3].charAt(2)) + t, 16);\n        red = toInt((t = rgb[3].charAt(1)) + t, 16);\n      }\n\n      if (rgb[4]) {\n        values = rgb[4].split(commaSpaces);\n        red = toFloat(values[0]);\n        values[0].slice(-1) == \"%\" && (red *= 2.55);\n        green = toFloat(values[1]);\n        values[1].slice(-1) == \"%\" && (green *= 2.55);\n        blue = toFloat(values[2]);\n        values[2].slice(-1) == \"%\" && (blue *= 2.55);\n        rgb[1].toLowerCase().slice(0, 4) == \"rgba\" && (opacity = toFloat(values[3]));\n        values[3] && values[3].slice(-1) == \"%\" && (opacity /= 100);\n      }\n\n      if (rgb[5]) {\n        values = rgb[5].split(commaSpaces);\n        red = toFloat(values[0]);\n        values[0].slice(-1) == \"%\" && (red /= 100);\n        green = toFloat(values[1]);\n        values[1].slice(-1) == \"%\" && (green /= 100);\n        blue = toFloat(values[2]);\n        values[2].slice(-1) == \"%\" && (blue /= 100);\n        (values[0].slice(-3) == \"deg\" || values[0].slice(-1) == \"\\xb0\") && (red /= 360);\n        rgb[1].toLowerCase().slice(0, 4) == \"hsba\" && (opacity = toFloat(values[3]));\n        values[3] && values[3].slice(-1) == \"%\" && (opacity /= 100);\n        return Snap.hsb2rgb(red, green, blue, opacity);\n      }\n\n      if (rgb[6]) {\n        values = rgb[6].split(commaSpaces);\n        red = toFloat(values[0]);\n        values[0].slice(-1) == \"%\" && (red /= 100);\n        green = toFloat(values[1]);\n        values[1].slice(-1) == \"%\" && (green /= 100);\n        blue = toFloat(values[2]);\n        values[2].slice(-1) == \"%\" && (blue /= 100);\n        (values[0].slice(-3) == \"deg\" || values[0].slice(-1) == \"\\xb0\") && (red /= 360);\n        rgb[1].toLowerCase().slice(0, 4) == \"hsla\" && (opacity = toFloat(values[3]));\n        values[3] && values[3].slice(-1) == \"%\" && (opacity /= 100);\n        return Snap.hsl2rgb(red, green, blue, opacity);\n      }\n\n      red = mmin(math.round(red), 255);\n      green = mmin(math.round(green), 255);\n      blue = mmin(math.round(blue), 255);\n      opacity = mmin(mmax(opacity, 0), 1);\n      rgb = {\n        r: red,\n        g: green,\n        b: blue,\n        toString: rgbtoString\n      };\n      rgb.hex = \"#\" + (16777216 | blue | green << 8 | red << 16).toString(16).slice(1);\n      rgb.opacity = is(opacity, \"finite\") ? opacity : 1;\n      return rgb;\n    }\n\n    return {\n      r: -1,\n      g: -1,\n      b: -1,\n      hex: \"none\",\n      error: 1,\n      toString: rgbtoString\n    };\n  }, Snap);\n  /*\\\n   * Snap.hsb\n   [ method ]\n   **\n   * Converts HSB values to a hex representation of the color\n   - h (number) hue\n   - s (number) saturation\n   - b (number) value or brightness\n   = (string) hex representation of the color\n  \\*/\n\n  Snap.hsb = cacher(function (h, s, b) {\n    return Snap.hsb2rgb(h, s, b).hex;\n  });\n  /*\\\n   * Snap.hsl\n   [ method ]\n   **\n   * Converts HSL values to a hex representation of the color\n   - h (number) hue\n   - s (number) saturation\n   - l (number) luminosity\n   = (string) hex representation of the color\n  \\*/\n\n  Snap.hsl = cacher(function (h, s, l) {\n    return Snap.hsl2rgb(h, s, l).hex;\n  });\n  /*\\\n   * Snap.rgb\n   [ method ]\n   **\n   * Converts RGB values to a hex representation of the color\n   - r (number) red\n   - g (number) green\n   - b (number) blue\n   = (string) hex representation of the color\n  \\*/\n\n  Snap.rgb = cacher(function (r, g, b, o) {\n    if (is(o, \"finite\")) {\n      var round = math.round;\n      return \"rgba(\" + [round(r), round(g), round(b), +o.toFixed(2)] + \")\";\n    }\n\n    return \"#\" + (16777216 | b | g << 8 | r << 16).toString(16).slice(1);\n  });\n\n  var _toHex = function toHex(color) {\n    var i = glob.doc.getElementsByTagName(\"head\")[0] || glob.doc.getElementsByTagName(\"svg\")[0],\n        red = \"rgb(255, 0, 0)\";\n    _toHex = cacher(function (color) {\n      if (color.toLowerCase() == \"red\") {\n        return red;\n      }\n\n      i.style.color = red;\n      i.style.color = color;\n      var out = glob.doc.defaultView.getComputedStyle(i, E).getPropertyValue(\"color\");\n      return out == red ? null : out;\n    });\n    return _toHex(color);\n  },\n      hsbtoString = function hsbtoString() {\n    return \"hsb(\" + [this.h, this.s, this.b] + \")\";\n  },\n      hsltoString = function hsltoString() {\n    return \"hsl(\" + [this.h, this.s, this.l] + \")\";\n  },\n      rgbtoString = function rgbtoString() {\n    return this.opacity == 1 || this.opacity == null ? this.hex : \"rgba(\" + [this.r, this.g, this.b, this.opacity] + \")\";\n  },\n      prepareRGB = function prepareRGB(r, g, b) {\n    if (g == null && is(r, \"object\") && \"r\" in r && \"g\" in r && \"b\" in r) {\n      b = r.b;\n      g = r.g;\n      r = r.r;\n    }\n\n    if (g == null && is(r, string)) {\n      var clr = Snap.getRGB(r);\n      r = clr.r;\n      g = clr.g;\n      b = clr.b;\n    }\n\n    if (r > 1 || g > 1 || b > 1) {\n      r /= 255;\n      g /= 255;\n      b /= 255;\n    }\n\n    return [r, g, b];\n  },\n      packageRGB = function packageRGB(r, g, b, o) {\n    r = math.round(r * 255);\n    g = math.round(g * 255);\n    b = math.round(b * 255);\n    var rgb = {\n      r: r,\n      g: g,\n      b: b,\n      opacity: is(o, \"finite\") ? o : 1,\n      hex: Snap.rgb(r, g, b),\n      toString: rgbtoString\n    };\n    is(o, \"finite\") && (rgb.opacity = o);\n    return rgb;\n  };\n  /*\\\n   * Snap.color\n   [ method ]\n   **\n   * Parses the color string and returns an object featuring the color's component values\n   - clr (string) color string in one of the supported formats (see @Snap.getRGB)\n   = (object) Combined RGB/HSB object in the following format:\n   o {\n   o     r (number) red,\n   o     g (number) green,\n   o     b (number) blue,\n   o     hex (string) color in HTML/CSS format: #••••••,\n   o     error (boolean) `true` if string can't be parsed,\n   o     h (number) hue,\n   o     s (number) saturation,\n   o     v (number) value (brightness),\n   o     l (number) lightness\n   o }\n  \\*/\n\n\n  Snap.color = function (clr) {\n    var rgb;\n\n    if (is(clr, \"object\") && \"h\" in clr && \"s\" in clr && \"b\" in clr) {\n      rgb = Snap.hsb2rgb(clr);\n      clr.r = rgb.r;\n      clr.g = rgb.g;\n      clr.b = rgb.b;\n      clr.opacity = 1;\n      clr.hex = rgb.hex;\n    } else if (is(clr, \"object\") && \"h\" in clr && \"s\" in clr && \"l\" in clr) {\n      rgb = Snap.hsl2rgb(clr);\n      clr.r = rgb.r;\n      clr.g = rgb.g;\n      clr.b = rgb.b;\n      clr.opacity = 1;\n      clr.hex = rgb.hex;\n    } else {\n      if (is(clr, \"string\")) {\n        clr = Snap.getRGB(clr);\n      }\n\n      if (is(clr, \"object\") && \"r\" in clr && \"g\" in clr && \"b\" in clr && !(\"error\" in clr)) {\n        rgb = Snap.rgb2hsl(clr);\n        clr.h = rgb.h;\n        clr.s = rgb.s;\n        clr.l = rgb.l;\n        rgb = Snap.rgb2hsb(clr);\n        clr.v = rgb.b;\n      } else {\n        clr = {\n          hex: \"none\"\n        };\n        clr.r = clr.g = clr.b = clr.h = clr.s = clr.v = clr.l = -1;\n        clr.error = 1;\n      }\n    }\n\n    clr.toString = rgbtoString;\n    return clr;\n  };\n  /*\\\n   * Snap.hsb2rgb\n   [ method ]\n   **\n   * Converts HSB values to an RGB object\n   - h (number) hue\n   - s (number) saturation\n   - v (number) value or brightness\n   = (object) RGB object in the following format:\n   o {\n   o     r (number) red,\n   o     g (number) green,\n   o     b (number) blue,\n   o     hex (string) color in HTML/CSS format: #••••••\n   o }\n  \\*/\n\n\n  Snap.hsb2rgb = function (h, s, v, o) {\n    if (is(h, \"object\") && \"h\" in h && \"s\" in h && \"b\" in h) {\n      v = h.b;\n      s = h.s;\n      o = h.o;\n      h = h.h;\n    }\n\n    h *= 360;\n    var R, G, B, X, C;\n    h = h % 360 / 60;\n    C = v * s;\n    X = C * (1 - abs(h % 2 - 1));\n    R = G = B = v - C;\n    h = ~~h;\n    R += [C, X, 0, 0, X, C][h];\n    G += [X, C, C, X, 0, 0][h];\n    B += [0, 0, X, C, C, X][h];\n    return packageRGB(R, G, B, o);\n  };\n  /*\\\n   * Snap.hsl2rgb\n   [ method ]\n   **\n   * Converts HSL values to an RGB object\n   - h (number) hue\n   - s (number) saturation\n   - l (number) luminosity\n   = (object) RGB object in the following format:\n   o {\n   o     r (number) red,\n   o     g (number) green,\n   o     b (number) blue,\n   o     hex (string) color in HTML/CSS format: #••••••\n   o }\n  \\*/\n\n\n  Snap.hsl2rgb = function (h, s, l, o) {\n    if (is(h, \"object\") && \"h\" in h && \"s\" in h && \"l\" in h) {\n      l = h.l;\n      s = h.s;\n      h = h.h;\n    }\n\n    if (h > 1 || s > 1 || l > 1) {\n      h /= 360;\n      s /= 100;\n      l /= 100;\n    }\n\n    h *= 360;\n    var R, G, B, X, C;\n    h = h % 360 / 60;\n    C = 2 * s * (l < .5 ? l : 1 - l);\n    X = C * (1 - abs(h % 2 - 1));\n    R = G = B = l - C / 2;\n    h = ~~h;\n    R += [C, X, 0, 0, X, C][h];\n    G += [X, C, C, X, 0, 0][h];\n    B += [0, 0, X, C, C, X][h];\n    return packageRGB(R, G, B, o);\n  };\n  /*\\\n   * Snap.rgb2hsb\n   [ method ]\n   **\n   * Converts RGB values to an HSB object\n   - r (number) red\n   - g (number) green\n   - b (number) blue\n   = (object) HSB object in the following format:\n   o {\n   o     h (number) hue,\n   o     s (number) saturation,\n   o     b (number) brightness\n   o }\n  \\*/\n\n\n  Snap.rgb2hsb = function (r, g, b) {\n    b = prepareRGB(r, g, b);\n    r = b[0];\n    g = b[1];\n    b = b[2];\n    var H, S, V, C;\n    V = mmax(r, g, b);\n    C = V - mmin(r, g, b);\n    H = C == 0 ? null : V == r ? (g - b) / C : V == g ? (b - r) / C + 2 : (r - g) / C + 4;\n    H = (H + 360) % 6 * 60 / 360;\n    S = C == 0 ? 0 : C / V;\n    return {\n      h: H,\n      s: S,\n      b: V,\n      toString: hsbtoString\n    };\n  };\n  /*\\\n   * Snap.rgb2hsl\n   [ method ]\n   **\n   * Converts RGB values to an HSL object\n   - r (number) red\n   - g (number) green\n   - b (number) blue\n   = (object) HSL object in the following format:\n   o {\n   o     h (number) hue,\n   o     s (number) saturation,\n   o     l (number) luminosity\n   o }\n  \\*/\n\n\n  Snap.rgb2hsl = function (r, g, b) {\n    b = prepareRGB(r, g, b);\n    r = b[0];\n    g = b[1];\n    b = b[2];\n    var H, S, L, M, m, C;\n    M = mmax(r, g, b);\n    m = mmin(r, g, b);\n    C = M - m;\n    H = C == 0 ? null : M == r ? (g - b) / C : M == g ? (b - r) / C + 2 : (r - g) / C + 4;\n    H = (H + 360) % 6 * 60 / 360;\n    L = (M + m) / 2;\n    S = C == 0 ? 0 : L < .5 ? C / (2 * L) : C / (2 - 2 * L);\n    return {\n      h: H,\n      s: S,\n      l: L,\n      toString: hsltoString\n    };\n  }; // Transformations\n\n  /*\\\n   * Snap.parsePathString\n   [ method ]\n   **\n   * Utility method\n   **\n   * Parses given path string into an array of arrays of path segments\n   - pathString (string|array) path string or array of segments (in the last case it is returned straight away)\n   = (array) array of segments\n  \\*/\n\n\n  Snap.parsePathString = function (pathString) {\n    if (!pathString) {\n      return null;\n    }\n\n    var pth = Snap.path(pathString);\n\n    if (pth.arr) {\n      return Snap.path.clone(pth.arr);\n    }\n\n    var paramCounts = {\n      a: 7,\n      c: 6,\n      o: 2,\n      h: 1,\n      l: 2,\n      m: 2,\n      r: 4,\n      q: 4,\n      s: 4,\n      t: 2,\n      v: 1,\n      u: 3,\n      z: 0\n    },\n        data = [];\n\n    if (is(pathString, \"array\") && is(pathString[0], \"array\")) {\n      // rough assumption\n      data = Snap.path.clone(pathString);\n    }\n\n    if (!data.length) {\n      Str(pathString).replace(pathCommand, function (a, b, c) {\n        var params = [],\n            name = b.toLowerCase();\n        c.replace(pathValues, function (a, b) {\n          b && params.push(+b);\n        });\n\n        if (name == \"m\" && params.length > 2) {\n          data.push([b].concat(params.splice(0, 2)));\n          name = \"l\";\n          b = b == \"m\" ? \"l\" : \"L\";\n        }\n\n        if (name == \"o\" && params.length == 1) {\n          data.push([b, params[0]]);\n        }\n\n        if (name == \"r\") {\n          data.push([b].concat(params));\n        } else while (params.length >= paramCounts[name]) {\n          data.push([b].concat(params.splice(0, paramCounts[name])));\n\n          if (!paramCounts[name]) {\n            break;\n          }\n        }\n      });\n    }\n\n    data.toString = Snap.path.toString;\n    pth.arr = Snap.path.clone(data);\n    return data;\n  };\n  /*\\\n   * Snap.parseTransformString\n   [ method ]\n   **\n   * Utility method\n   **\n   * Parses given transform string into an array of transformations\n   - TString (string|array) transform string or array of transformations (in the last case it is returned straight away)\n   = (array) array of transformations\n  \\*/\n\n\n  var parseTransformString = Snap.parseTransformString = function (TString) {\n    if (!TString) {\n      return null;\n    }\n\n    var paramCounts = {\n      r: 3,\n      s: 4,\n      t: 2,\n      m: 6\n    },\n        data = [];\n\n    if (is(TString, \"array\") && is(TString[0], \"array\")) {\n      // rough assumption\n      data = Snap.path.clone(TString);\n    }\n\n    if (!data.length) {\n      Str(TString).replace(tCommand, function (a, b, c) {\n        var params = [],\n            name = b.toLowerCase();\n        c.replace(pathValues, function (a, b) {\n          b && params.push(+b);\n        });\n        data.push([b].concat(params));\n      });\n    }\n\n    data.toString = Snap.path.toString;\n    return data;\n  };\n\n  function svgTransform2string(tstr) {\n    var res = [];\n    tstr = tstr.replace(/(?:^|\\s)(\\w+)\\(([^)]+)\\)/g, function (all, name, params) {\n      params = params.split(/\\s*,\\s*|\\s+/);\n\n      if (name == \"rotate\" && params.length == 1) {\n        params.push(0, 0);\n      }\n\n      if (name == \"scale\") {\n        if (params.length > 2) {\n          params = params.slice(0, 2);\n        } else if (params.length == 2) {\n          params.push(0, 0);\n        }\n\n        if (params.length == 1) {\n          params.push(params[0], 0, 0);\n        }\n      }\n\n      if (name == \"skewX\") {\n        res.push([\"m\", 1, 0, math.tan(rad(params[0])), 1, 0, 0]);\n      } else if (name == \"skewY\") {\n        res.push([\"m\", 1, math.tan(rad(params[0])), 0, 1, 0, 0]);\n      } else {\n        res.push([name.charAt(0)].concat(params));\n      }\n\n      return all;\n    });\n    return res;\n  }\n\n  Snap._.svgTransform2string = svgTransform2string;\n  Snap._.rgTransform = /^[a-z][\\s]*-?\\.?\\d/i;\n\n  function transform2matrix(tstr, bbox) {\n    var tdata = parseTransformString(tstr),\n        m = new Snap.Matrix();\n\n    if (tdata) {\n      for (var i = 0, ii = tdata.length; i < ii; i++) {\n        var t = tdata[i],\n            tlen = t.length,\n            command = Str(t[0]).toLowerCase(),\n            absolute = t[0] != command,\n            inver = absolute ? m.invert() : 0,\n            x1,\n            y1,\n            x2,\n            y2,\n            bb;\n\n        if (command == \"t\" && tlen == 2) {\n          m.translate(t[1], 0);\n        } else if (command == \"t\" && tlen == 3) {\n          if (absolute) {\n            x1 = inver.x(0, 0);\n            y1 = inver.y(0, 0);\n            x2 = inver.x(t[1], t[2]);\n            y2 = inver.y(t[1], t[2]);\n            m.translate(x2 - x1, y2 - y1);\n          } else {\n            m.translate(t[1], t[2]);\n          }\n        } else if (command == \"r\") {\n          if (tlen == 2) {\n            bb = bb || bbox;\n            m.rotate(t[1], bb.x + bb.width / 2, bb.y + bb.height / 2);\n          } else if (tlen == 4) {\n            if (absolute) {\n              x2 = inver.x(t[2], t[3]);\n              y2 = inver.y(t[2], t[3]);\n              m.rotate(t[1], x2, y2);\n            } else {\n              m.rotate(t[1], t[2], t[3]);\n            }\n          }\n        } else if (command == \"s\") {\n          if (tlen == 2 || tlen == 3) {\n            bb = bb || bbox;\n            m.scale(t[1], t[tlen - 1], bb.x + bb.width / 2, bb.y + bb.height / 2);\n          } else if (tlen == 4) {\n            if (absolute) {\n              x2 = inver.x(t[2], t[3]);\n              y2 = inver.y(t[2], t[3]);\n              m.scale(t[1], t[1], x2, y2);\n            } else {\n              m.scale(t[1], t[1], t[2], t[3]);\n            }\n          } else if (tlen == 5) {\n            if (absolute) {\n              x2 = inver.x(t[3], t[4]);\n              y2 = inver.y(t[3], t[4]);\n              m.scale(t[1], t[2], x2, y2);\n            } else {\n              m.scale(t[1], t[2], t[3], t[4]);\n            }\n          }\n        } else if (command == \"m\" && tlen == 7) {\n          m.add(t[1], t[2], t[3], t[4], t[5], t[6]);\n        }\n      }\n    }\n\n    return m;\n  }\n\n  Snap._.transform2matrix = transform2matrix;\n  Snap._unit2px = unit2px;\n  var contains = glob.doc.contains || glob.doc.compareDocumentPosition ? function (a, b) {\n    var adown = a.nodeType == 9 ? a.documentElement : a,\n        bup = b && b.parentNode;\n    return a == bup || !!(bup && bup.nodeType == 1 && (adown.contains ? adown.contains(bup) : a.compareDocumentPosition && a.compareDocumentPosition(bup) & 16));\n  } : function (a, b) {\n    if (b) {\n      while (b) {\n        b = b.parentNode;\n\n        if (b == a) {\n          return true;\n        }\n      }\n    }\n\n    return false;\n  };\n\n  function getSomeDefs(el) {\n    var p = el.node.ownerSVGElement && wrap(el.node.ownerSVGElement) || el.node.parentNode && wrap(el.node.parentNode) || Snap.select(\"svg\") || Snap(0, 0),\n        pdefs = p.select(\"defs\"),\n        defs = pdefs == null ? false : pdefs.node;\n\n    if (!defs) {\n      defs = make(\"defs\", p.node).node;\n    }\n\n    return defs;\n  }\n\n  function getSomeSVG(el) {\n    return el.node.ownerSVGElement && wrap(el.node.ownerSVGElement) || Snap.select(\"svg\");\n  }\n\n  Snap._.getSomeDefs = getSomeDefs;\n  Snap._.getSomeSVG = getSomeSVG;\n\n  function unit2px(el, name, value) {\n    var svg = getSomeSVG(el).node,\n        out = {},\n        mgr = svg.querySelector(\".svg---mgr\");\n\n    if (!mgr) {\n      mgr = $(\"rect\");\n      $(mgr, {\n        x: -9e9,\n        y: -9e9,\n        width: 10,\n        height: 10,\n        \"class\": \"svg---mgr\",\n        fill: \"none\"\n      });\n      svg.appendChild(mgr);\n    }\n\n    function getW(val) {\n      if (val == null) {\n        return E;\n      }\n\n      if (val == +val) {\n        return val;\n      }\n\n      $(mgr, {\n        width: val\n      });\n\n      try {\n        return mgr.getBBox().width;\n      } catch (e) {\n        return 0;\n      }\n    }\n\n    function getH(val) {\n      if (val == null) {\n        return E;\n      }\n\n      if (val == +val) {\n        return val;\n      }\n\n      $(mgr, {\n        height: val\n      });\n\n      try {\n        return mgr.getBBox().height;\n      } catch (e) {\n        return 0;\n      }\n    }\n\n    function set(nam, f) {\n      if (name == null) {\n        out[nam] = f(el.attr(nam) || 0);\n      } else if (nam == name) {\n        out = f(value == null ? el.attr(nam) || 0 : value);\n      }\n    }\n\n    switch (el.type) {\n      case \"rect\":\n        set(\"rx\", getW);\n        set(\"ry\", getH);\n\n      case \"image\":\n        set(\"width\", getW);\n        set(\"height\", getH);\n\n      case \"text\":\n        set(\"x\", getW);\n        set(\"y\", getH);\n        break;\n\n      case \"circle\":\n        set(\"cx\", getW);\n        set(\"cy\", getH);\n        set(\"r\", getW);\n        break;\n\n      case \"ellipse\":\n        set(\"cx\", getW);\n        set(\"cy\", getH);\n        set(\"rx\", getW);\n        set(\"ry\", getH);\n        break;\n\n      case \"line\":\n        set(\"x1\", getW);\n        set(\"x2\", getW);\n        set(\"y1\", getH);\n        set(\"y2\", getH);\n        break;\n\n      case \"marker\":\n        set(\"refX\", getW);\n        set(\"markerWidth\", getW);\n        set(\"refY\", getH);\n        set(\"markerHeight\", getH);\n        break;\n\n      case \"radialGradient\":\n        set(\"fx\", getW);\n        set(\"fy\", getH);\n        break;\n\n      case \"tspan\":\n        set(\"dx\", getW);\n        set(\"dy\", getH);\n        break;\n\n      default:\n        set(name, getW);\n    }\n\n    svg.removeChild(mgr);\n    return out;\n  }\n  /*\\\n   * Snap.select\n   [ method ]\n   **\n   * Wraps a DOM element specified by CSS selector as @Element\n   - query (string) CSS selector of the element\n   = (Element) the current element\n  \\*/\n\n\n  Snap.select = function (query) {\n    query = Str(query).replace(/([^\\\\]):/g, \"$1\\\\:\");\n    return wrap(glob.doc.querySelector(query));\n  };\n  /*\\\n   * Snap.selectAll\n   [ method ]\n   **\n   * Wraps DOM elements specified by CSS selector as set or array of @Element\n   - query (string) CSS selector of the element\n   = (Element) the current element\n  \\*/\n\n\n  Snap.selectAll = function (query) {\n    var nodelist = glob.doc.querySelectorAll(query),\n        set = (Snap.set || Array)();\n\n    for (var i = 0; i < nodelist.length; i++) {\n      set.push(wrap(nodelist[i]));\n    }\n\n    return set;\n  };\n\n  function add2group(list) {\n    if (!is(list, \"array\")) {\n      list = Array.prototype.slice.call(arguments, 0);\n    }\n\n    var i = 0,\n        j = 0,\n        node = this.node;\n\n    while (this[i]) {\n      delete this[i++];\n    }\n\n    for (i = 0; i < list.length; i++) {\n      if (list[i].type == \"set\") {\n        list[i].forEach(function (el) {\n          node.appendChild(el.node);\n        });\n      } else {\n        node.appendChild(list[i].node);\n      }\n    }\n\n    var children = node.childNodes;\n\n    for (i = 0; i < children.length; i++) {\n      this[j++] = wrap(children[i]);\n    }\n\n    return this;\n  } // Hub garbage collector every 10s\n\n\n  setInterval(function () {\n    for (var key in hub) {\n      if (hub[has](key)) {\n        var el = hub[key],\n            node = el.node;\n\n        if (el.type != \"svg\" && !node.ownerSVGElement || el.type == \"svg\" && (!node.parentNode || \"ownerSVGElement\" in node.parentNode && !node.ownerSVGElement)) {\n          delete hub[key];\n        }\n      }\n    }\n  }, 1e4);\n\n  function Element(el) {\n    if (el.snap in hub) {\n      return hub[el.snap];\n    }\n\n    var svg;\n\n    try {\n      svg = el.ownerSVGElement;\n    } catch (e) {}\n    /*\\\n     * Element.node\n     [ property (object) ]\n     **\n     * Gives you a reference to the DOM object, so you can assign event handlers or just mess around.\n     > Usage\n     | // draw a circle at coordinate 10,10 with radius of 10\n     | var c = paper.circle(10, 10, 10);\n     | c.node.onclick = function () {\n     |     c.attr(\"fill\", \"red\");\n     | };\n    \\*/\n\n\n    this.node = el;\n\n    if (svg) {\n      this.paper = new Paper(svg);\n    }\n    /*\\\n     * Element.type\n     [ property (string) ]\n     **\n     * SVG tag name of the given element.\n    \\*/\n\n\n    this.type = el.tagName || el.nodeName;\n    var id = this.id = ID(this);\n    this.anims = {};\n    this._ = {\n      transform: []\n    };\n    el.snap = id;\n    hub[id] = this;\n\n    if (this.type == \"g\") {\n      this.add = add2group;\n    }\n\n    if (this.type in {\n      g: 1,\n      mask: 1,\n      pattern: 1,\n      symbol: 1\n    }) {\n      for (var method in Paper.prototype) {\n        if (Paper.prototype[has](method)) {\n          this[method] = Paper.prototype[method];\n        }\n      }\n    }\n  }\n  /*\\\n    * Element.attr\n    [ method ]\n    **\n    * Gets or sets given attributes of the element.\n    **\n    - params (object) contains key-value pairs of attributes you want to set\n    * or\n    - param (string) name of the attribute\n    = (Element) the current element\n    * or\n    = (string) value of attribute\n    > Usage\n    | el.attr({\n    |     fill: \"#fc0\",\n    |     stroke: \"#000\",\n    |     strokeWidth: 2, // CamelCase...\n    |     \"fill-opacity\": 0.5, // or dash-separated names\n    |     width: \"*=2\" // prefixed values\n    | });\n    | console.log(el.attr(\"fill\")); // #fc0\n    * Prefixed values in format `\"+=10\"` supported. All four operations\n    * (`+`, `-`, `*` and `/`) could be used. Optionally you can use units for `+`\n    * and `-`: `\"+=2em\"`.\n   \\*/\n\n\n  Element.prototype.attr = function (params, value) {\n    var el = this,\n        node = el.node;\n\n    if (!params) {\n      if (node.nodeType != 1) {\n        return {\n          text: node.nodeValue\n        };\n      }\n\n      var attr = node.attributes,\n          out = {};\n\n      for (var i = 0, ii = attr.length; i < ii; i++) {\n        out[attr[i].nodeName] = attr[i].nodeValue;\n      }\n\n      return out;\n    }\n\n    if (is(params, \"string\")) {\n      if (arguments.length > 1) {\n        var json = {};\n        json[params] = value;\n        params = json;\n      } else {\n        return eve(\"snap.util.getattr.\" + params, el).firstDefined();\n      }\n    }\n\n    for (var att in params) {\n      if (params[has](att)) {\n        eve(\"snap.util.attr.\" + att, el, params[att]);\n      }\n    }\n\n    return el;\n  };\n  /*\\\n   * Snap.parse\n   [ method ]\n   **\n   * Parses SVG fragment and converts it into a @Fragment\n   **\n   - svg (string) SVG string\n   = (Fragment) the @Fragment\n  \\*/\n\n\n  Snap.parse = function (svg) {\n    var f = glob.doc.createDocumentFragment(),\n        full = true,\n        div = glob.doc.createElement(\"div\");\n    svg = Str(svg);\n\n    if (!svg.match(/^\\s*<\\s*svg(?:\\s|>)/)) {\n      svg = \"<svg>\" + svg + \"</svg>\";\n      full = false;\n    }\n\n    div.innerHTML = svg;\n    svg = div.getElementsByTagName(\"svg\")[0];\n\n    if (svg) {\n      if (full) {\n        f = svg;\n      } else {\n        while (svg.firstChild) {\n          f.appendChild(svg.firstChild);\n        }\n      }\n    }\n\n    return new Fragment(f);\n  };\n\n  function Fragment(frag) {\n    this.node = frag;\n  }\n  /*\\\n   * Snap.fragment\n   [ method ]\n   **\n   * Creates a DOM fragment from a given list of elements or strings\n   **\n   - varargs (…) SVG string\n   = (Fragment) the @Fragment\n  \\*/\n\n\n  Snap.fragment = function () {\n    var args = Array.prototype.slice.call(arguments, 0),\n        f = glob.doc.createDocumentFragment();\n\n    for (var i = 0, ii = args.length; i < ii; i++) {\n      var item = args[i];\n\n      if (item.node && item.node.nodeType) {\n        f.appendChild(item.node);\n      }\n\n      if (item.nodeType) {\n        f.appendChild(item);\n      }\n\n      if (typeof item == \"string\") {\n        f.appendChild(Snap.parse(item).node);\n      }\n    }\n\n    return new Fragment(f);\n  };\n\n  function make(name, parent) {\n    var res = $(name);\n    parent.appendChild(res);\n    var el = wrap(res);\n    return el;\n  }\n\n  function Paper(w, h) {\n    var res,\n        desc,\n        defs,\n        proto = Paper.prototype;\n\n    if (w && w.tagName && w.tagName.toLowerCase() == \"svg\") {\n      if (w.snap in hub) {\n        return hub[w.snap];\n      }\n\n      var doc = w.ownerDocument;\n      res = new Element(w);\n      desc = w.getElementsByTagName(\"desc\")[0];\n      defs = w.getElementsByTagName(\"defs\")[0];\n\n      if (!desc) {\n        desc = $(\"desc\");\n        desc.appendChild(doc.createTextNode(\"Created with Snap\"));\n        res.node.appendChild(desc);\n      }\n\n      if (!defs) {\n        defs = $(\"defs\");\n        res.node.appendChild(defs);\n      }\n\n      res.defs = defs;\n\n      for (var key in proto) {\n        if (proto[has](key)) {\n          res[key] = proto[key];\n        }\n      }\n\n      res.paper = res.root = res;\n    } else {\n      res = make(\"svg\", glob.doc.body);\n      $(res.node, {\n        height: h,\n        version: 1.1,\n        width: w,\n        xmlns: xmlns\n      });\n    }\n\n    return res;\n  }\n\n  function wrap(dom) {\n    if (!dom) {\n      return dom;\n    }\n\n    if (dom instanceof Element || dom instanceof Fragment) {\n      return dom;\n    }\n\n    if (dom.tagName && dom.tagName.toLowerCase() == \"svg\") {\n      return new Paper(dom);\n    }\n\n    if (dom.tagName && dom.tagName.toLowerCase() == \"object\" && dom.type == \"image/svg+xml\") {\n      return new Paper(dom.contentDocument.getElementsByTagName(\"svg\")[0]);\n    }\n\n    return new Element(dom);\n  }\n\n  Snap._.make = make;\n  Snap._.wrap = wrap;\n  /*\\\n   * Paper.el\n   [ method ]\n   **\n   * Creates an element on paper with a given name and no attributes\n   **\n   - name (string) tag name\n   - attr (object) attributes\n   = (Element) the current element\n   > Usage\n   | var c = paper.circle(10, 10, 10); // is the same as...\n   | var c = paper.el(\"circle\").attr({\n   |     cx: 10,\n   |     cy: 10,\n   |     r: 10\n   | });\n   | // and the same as\n   | var c = paper.el(\"circle\", {\n   |     cx: 10,\n   |     cy: 10,\n   |     r: 10\n   | });\n  \\*/\n\n  Paper.prototype.el = function (name, attr) {\n    var el = make(name, this.node);\n    attr && el.attr(attr);\n    return el;\n  };\n  /*\\\n   * Element.children\n   [ method ]\n   **\n   * Returns array of all the children of the element.\n   = (array) array of Elements\n  \\*/\n\n\n  Element.prototype.children = function () {\n    var out = [],\n        ch = this.node.childNodes;\n\n    for (var i = 0, ii = ch.length; i < ii; i++) {\n      out[i] = Snap(ch[i]);\n    }\n\n    return out;\n  };\n\n  function jsonFiller(root, o) {\n    for (var i = 0, ii = root.length; i < ii; i++) {\n      var item = {\n        type: root[i].type,\n        attr: root[i].attr()\n      },\n          children = root[i].children();\n      o.push(item);\n\n      if (children.length) {\n        jsonFiller(children, item.childNodes = []);\n      }\n    }\n  }\n  /*\\\n   * Element.toJSON\n   [ method ]\n   **\n   * Returns object representation of the given element and all its children.\n   = (object) in format\n   o {\n   o     type (string) this.type,\n   o     attr (object) attributes map,\n   o     childNodes (array) optional array of children in the same format\n   o }\n  \\*/\n\n\n  Element.prototype.toJSON = function () {\n    var out = [];\n    jsonFiller([this], out);\n    return out[0];\n  }; // default\n\n\n  eve.on(\"snap.util.getattr\", function () {\n    var att = eve.nt();\n    att = att.substring(att.lastIndexOf(\".\") + 1);\n    var css = att.replace(/[A-Z]/g, function (letter) {\n      return \"-\" + letter.toLowerCase();\n    });\n\n    if (cssAttr[has](css)) {\n      return this.node.ownerDocument.defaultView.getComputedStyle(this.node, null).getPropertyValue(css);\n    } else {\n      return $(this.node, att);\n    }\n  });\n  var cssAttr = {\n    \"alignment-baseline\": 0,\n    \"baseline-shift\": 0,\n    \"clip\": 0,\n    \"clip-path\": 0,\n    \"clip-rule\": 0,\n    \"color\": 0,\n    \"color-interpolation\": 0,\n    \"color-interpolation-filters\": 0,\n    \"color-profile\": 0,\n    \"color-rendering\": 0,\n    \"cursor\": 0,\n    \"direction\": 0,\n    \"display\": 0,\n    \"dominant-baseline\": 0,\n    \"enable-background\": 0,\n    \"fill\": 0,\n    \"fill-opacity\": 0,\n    \"fill-rule\": 0,\n    \"filter\": 0,\n    \"flood-color\": 0,\n    \"flood-opacity\": 0,\n    \"font\": 0,\n    \"font-family\": 0,\n    \"font-size\": 0,\n    \"font-size-adjust\": 0,\n    \"font-stretch\": 0,\n    \"font-style\": 0,\n    \"font-variant\": 0,\n    \"font-weight\": 0,\n    \"glyph-orientation-horizontal\": 0,\n    \"glyph-orientation-vertical\": 0,\n    \"image-rendering\": 0,\n    \"kerning\": 0,\n    \"letter-spacing\": 0,\n    \"lighting-color\": 0,\n    \"marker\": 0,\n    \"marker-end\": 0,\n    \"marker-mid\": 0,\n    \"marker-start\": 0,\n    \"mask\": 0,\n    \"opacity\": 0,\n    \"overflow\": 0,\n    \"pointer-events\": 0,\n    \"shape-rendering\": 0,\n    \"stop-color\": 0,\n    \"stop-opacity\": 0,\n    \"stroke\": 0,\n    \"stroke-dasharray\": 0,\n    \"stroke-dashoffset\": 0,\n    \"stroke-linecap\": 0,\n    \"stroke-linejoin\": 0,\n    \"stroke-miterlimit\": 0,\n    \"stroke-opacity\": 0,\n    \"stroke-width\": 0,\n    \"text-anchor\": 0,\n    \"text-decoration\": 0,\n    \"text-rendering\": 0,\n    \"unicode-bidi\": 0,\n    \"visibility\": 0,\n    \"word-spacing\": 0,\n    \"writing-mode\": 0\n  };\n  eve.on(\"snap.util.attr\", function (value) {\n    var att = eve.nt(),\n        attr = {};\n    att = att.substring(att.lastIndexOf(\".\") + 1);\n    attr[att] = value;\n    var style = att.replace(/-(\\w)/gi, function (all, letter) {\n      return letter.toUpperCase();\n    }),\n        css = att.replace(/[A-Z]/g, function (letter) {\n      return \"-\" + letter.toLowerCase();\n    });\n\n    if (cssAttr[has](css)) {\n      this.node.style[style] = value == null ? E : value;\n    } else {\n      $(this.node, attr);\n    }\n  });\n\n  (function (proto) {})(Paper.prototype); // simple ajax\n\n  /*\\\n   * Snap.ajax\n   [ method ]\n   **\n   * Simple implementation of Ajax\n   **\n   - url (string) URL\n   - postData (object|string) data for post request\n   - callback (function) callback\n   - scope (object) #optional scope of callback\n   * or\n   - url (string) URL\n   - callback (function) callback\n   - scope (object) #optional scope of callback\n   = (XMLHttpRequest) the XMLHttpRequest object, just in case\n  \\*/\n\n\n  Snap.ajax = function (url, postData, callback, scope) {\n    var req = new XMLHttpRequest(),\n        id = ID();\n\n    if (req) {\n      if (is(postData, \"function\")) {\n        scope = callback;\n        callback = postData;\n        postData = null;\n      } else if (is(postData, \"object\")) {\n        var pd = [];\n\n        for (var key in postData) {\n          if (postData.hasOwnProperty(key)) {\n            pd.push(encodeURIComponent(key) + \"=\" + encodeURIComponent(postData[key]));\n          }\n        }\n\n        postData = pd.join(\"&\");\n      }\n\n      req.open(postData ? \"POST\" : \"GET\", url, true);\n\n      if (postData) {\n        req.setRequestHeader(\"X-Requested-With\", \"XMLHttpRequest\");\n        req.setRequestHeader(\"Content-type\", \"application/x-www-form-urlencoded\");\n      }\n\n      if (callback) {\n        eve.once(\"snap.ajax.\" + id + \".0\", callback);\n        eve.once(\"snap.ajax.\" + id + \".200\", callback);\n        eve.once(\"snap.ajax.\" + id + \".304\", callback);\n      }\n\n      req.onreadystatechange = function () {\n        if (req.readyState != 4) return;\n        eve(\"snap.ajax.\" + id + \".\" + req.status, scope, req);\n      };\n\n      if (req.readyState == 4) {\n        return req;\n      }\n\n      req.send(postData);\n      return req;\n    }\n  };\n  /*\\\n   * Snap.load\n   [ method ]\n   **\n   * Loads external SVG file as a @Fragment (see @Snap.ajax for more advanced AJAX)\n   **\n   - url (string) URL\n   - callback (function) callback\n   - scope (object) #optional scope of callback\n  \\*/\n\n\n  Snap.load = function (url, callback, scope) {\n    Snap.ajax(url, function (req) {\n      var f = Snap.parse(req.responseText);\n      scope ? callback.call(scope, f) : callback(f);\n    });\n  };\n\n  var getOffset = function getOffset(elem) {\n    var box = elem.getBoundingClientRect(),\n        doc = elem.ownerDocument,\n        body = doc.body,\n        docElem = doc.documentElement,\n        clientTop = docElem.clientTop || body.clientTop || 0,\n        clientLeft = docElem.clientLeft || body.clientLeft || 0,\n        top = box.top + (g.win.pageYOffset || docElem.scrollTop || body.scrollTop) - clientTop,\n        left = box.left + (g.win.pageXOffset || docElem.scrollLeft || body.scrollLeft) - clientLeft;\n    return {\n      y: top,\n      x: left\n    };\n  };\n  /*\\\n   * Snap.getElementByPoint\n   [ method ]\n   **\n   * Returns you topmost element under given point.\n   **\n   = (object) Snap element object\n   - x (number) x coordinate from the top left corner of the window\n   - y (number) y coordinate from the top left corner of the window\n   > Usage\n   | Snap.getElementByPoint(mouseX, mouseY).attr({stroke: \"#f00\"});\n  \\*/\n\n\n  Snap.getElementByPoint = function (x, y) {\n    var paper = this,\n        svg = paper.canvas,\n        target = glob.doc.elementFromPoint(x, y);\n\n    if (glob.win.opera && target.tagName == \"svg\") {\n      var so = getOffset(target),\n          sr = target.createSVGRect();\n      sr.x = x - so.x;\n      sr.y = y - so.y;\n      sr.width = sr.height = 1;\n      var hits = target.getIntersectionList(sr, null);\n\n      if (hits.length) {\n        target = hits[hits.length - 1];\n      }\n    }\n\n    if (!target) {\n      return null;\n    }\n\n    return wrap(target);\n  };\n  /*\\\n   * Snap.plugin\n   [ method ]\n   **\n   * Let you write plugins. You pass in a function with five arguments, like this:\n   | Snap.plugin(function (Snap, Element, Paper, global, Fragment) {\n   |     Snap.newmethod = function () {};\n   |     Element.prototype.newmethod = function () {};\n   |     Paper.prototype.newmethod = function () {};\n   | });\n   * Inside the function you have access to all main objects (and their\n   * prototypes). This allow you to extend anything you want.\n   **\n   - f (function) your plugin body\n  \\*/\n\n\n  Snap.plugin = function (f) {\n    f(Snap, Element, Paper, glob, Fragment);\n  };\n\n  glob.win.Snap = Snap;\n  return Snap;\n}(window || this); // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\n\nSnap.plugin(function (Snap, Element, Paper, glob, Fragment) {\n  var elproto = Element.prototype,\n      is = Snap.is,\n      Str = String,\n      unit2px = Snap._unit2px,\n      $ = Snap._.$,\n      make = Snap._.make,\n      getSomeDefs = Snap._.getSomeDefs,\n      has = \"hasOwnProperty\",\n      wrap = Snap._.wrap;\n  /*\\\n   * Element.getBBox\n   [ method ]\n   **\n   * Returns the bounding box descriptor for the given element\n   **\n   = (object) bounding box descriptor:\n   o {\n   o     cx: (number) x of the center,\n   o     cy: (number) x of the center,\n   o     h: (number) height,\n   o     height: (number) height,\n   o     path: (string) path command for the box,\n   o     r0: (number) radius of a circle that fully encloses the box,\n   o     r1: (number) radius of the smallest circle that can be enclosed,\n   o     r2: (number) radius of the largest circle that can be enclosed,\n   o     vb: (string) box as a viewbox command,\n   o     w: (number) width,\n   o     width: (number) width,\n   o     x2: (number) x of the right side,\n   o     x: (number) x of the left side,\n   o     y2: (number) y of the bottom edge,\n   o     y: (number) y of the top edge\n   o }\n  \\*/\n\n  elproto.getBBox = function (isWithoutTransform) {\n    if (this.type == \"tspan\") {\n      return Snap._.box(this.node.getClientRects().item(0));\n    }\n\n    if (!Snap.Matrix || !Snap.path) {\n      return this.node.getBBox();\n    }\n\n    var el = this,\n        m = new Snap.Matrix();\n\n    if (el.removed) {\n      return Snap._.box();\n    }\n\n    while (el.type == \"use\") {\n      if (!isWithoutTransform) {\n        m = m.add(el.transform().localMatrix.translate(el.attr(\"x\") || 0, el.attr(\"y\") || 0));\n      }\n\n      if (el.original) {\n        el = el.original;\n      } else {\n        var href = el.attr(\"xlink:href\");\n        el = el.original = el.node.ownerDocument.getElementById(href.substring(href.indexOf(\"#\") + 1));\n      }\n    }\n\n    var _ = el._,\n        pathfinder = Snap.path.get[el.type] || Snap.path.get.deflt;\n\n    try {\n      if (isWithoutTransform) {\n        _.bboxwt = pathfinder ? Snap.path.getBBox(el.realPath = pathfinder(el)) : Snap._.box(el.node.getBBox());\n        return Snap._.box(_.bboxwt);\n      } else {\n        el.realPath = pathfinder(el);\n        el.matrix = el.transform().localMatrix;\n        _.bbox = Snap.path.getBBox(Snap.path.map(el.realPath, m.add(el.matrix)));\n        return Snap._.box(_.bbox);\n      }\n    } catch (e) {\n      // Firefox doesn’t give you bbox of hidden element\n      return Snap._.box();\n    }\n  };\n\n  var propString = function propString() {\n    return this.string;\n  };\n\n  function extractTransform(el, tstr) {\n    if (tstr == null) {\n      var doReturn = true;\n\n      if (el.type == \"linearGradient\" || el.type == \"radialGradient\") {\n        tstr = el.node.getAttribute(\"gradientTransform\");\n      } else if (el.type == \"pattern\") {\n        tstr = el.node.getAttribute(\"patternTransform\");\n      } else {\n        tstr = el.node.getAttribute(\"transform\");\n      }\n\n      if (!tstr) {\n        return new Snap.Matrix();\n      }\n\n      tstr = Snap._.svgTransform2string(tstr);\n    } else {\n      if (!Snap._.rgTransform.test(tstr)) {\n        tstr = Snap._.svgTransform2string(tstr);\n      } else {\n        tstr = Str(tstr).replace(/\\.{3}|\\u2026/g, el._.transform || \"\");\n      }\n\n      if (is(tstr, \"array\")) {\n        tstr = Snap.path ? Snap.path.toString.call(tstr) : Str(tstr);\n      }\n\n      el._.transform = tstr;\n    }\n\n    var m = Snap._.transform2matrix(tstr, el.getBBox(1));\n\n    if (doReturn) {\n      return m;\n    } else {\n      el.matrix = m;\n    }\n  }\n  /*\\\n   * Element.transform\n   [ method ]\n   **\n   * Gets or sets transformation of the element\n   **\n   - tstr (string) transform string in Snap or SVG format\n   = (Element) the current element\n   * or\n   = (object) transformation descriptor:\n   o {\n   o     string (string) transform string,\n   o     globalMatrix (Matrix) matrix of all transformations applied to element or its parents,\n   o     localMatrix (Matrix) matrix of transformations applied only to the element,\n   o     diffMatrix (Matrix) matrix of difference between global and local transformations,\n   o     global (string) global transformation as string,\n   o     local (string) local transformation as string,\n   o     toString (function) returns `string` property\n   o }\n  \\*/\n\n\n  elproto.transform = function (tstr) {\n    var _ = this._;\n\n    if (tstr == null) {\n      var papa = this,\n          global = new Snap.Matrix(this.node.getCTM()),\n          local = extractTransform(this),\n          ms = [local],\n          m = new Snap.Matrix(),\n          i,\n          localString = local.toTransformString(),\n          string = Str(local) == Str(this.matrix) ? Str(_.transform) : localString;\n\n      while (papa.type != \"svg\" && (papa = papa.parent())) {\n        ms.push(extractTransform(papa));\n      }\n\n      i = ms.length;\n\n      while (i--) {\n        m.add(ms[i]);\n      }\n\n      return {\n        string: string,\n        globalMatrix: global,\n        totalMatrix: m,\n        localMatrix: local,\n        diffMatrix: global.clone().add(local.invert()),\n        global: global.toTransformString(),\n        total: m.toTransformString(),\n        local: localString,\n        toString: propString\n      };\n    }\n\n    if (tstr instanceof Snap.Matrix) {\n      this.matrix = tstr;\n      this._.transform = tstr.toTransformString();\n    } else {\n      extractTransform(this, tstr);\n    }\n\n    if (this.node) {\n      if (this.type == \"linearGradient\" || this.type == \"radialGradient\") {\n        $(this.node, {\n          gradientTransform: this.matrix\n        });\n      } else if (this.type == \"pattern\") {\n        $(this.node, {\n          patternTransform: this.matrix\n        });\n      } else {\n        $(this.node, {\n          transform: this.matrix\n        });\n      }\n    }\n\n    return this;\n  };\n  /*\\\n   * Element.parent\n   [ method ]\n   **\n   * Returns the element's parent\n   **\n   = (Element) the parent element\n  \\*/\n\n\n  elproto.parent = function () {\n    return wrap(this.node.parentNode);\n  };\n  /*\\\n   * Element.append\n   [ method ]\n   **\n   * Appends the given element to current one\n   **\n   - el (Element|Set) element to append\n   = (Element) the parent element\n  \\*/\n\n  /*\\\n   * Element.add\n   [ method ]\n   **\n   * See @Element.append\n  \\*/\n\n\n  elproto.append = elproto.add = function (el) {\n    if (el) {\n      if (el.type == \"set\") {\n        var it = this;\n        el.forEach(function (el) {\n          it.add(el);\n        });\n        return this;\n      }\n\n      el = wrap(el);\n      this.node.appendChild(el.node);\n      el.paper = this.paper;\n    }\n\n    return this;\n  };\n  /*\\\n   * Element.appendTo\n   [ method ]\n   **\n   * Appends the current element to the given one\n   **\n   - el (Element) parent element to append to\n   = (Element) the child element\n  \\*/\n\n\n  elproto.appendTo = function (el) {\n    if (el) {\n      el = wrap(el);\n      el.append(this);\n    }\n\n    return this;\n  };\n  /*\\\n   * Element.prepend\n   [ method ]\n   **\n   * Prepends the given element to the current one\n   **\n   - el (Element) element to prepend\n   = (Element) the parent element\n  \\*/\n\n\n  elproto.prepend = function (el) {\n    if (el) {\n      if (el.type == \"set\") {\n        var it = this,\n            first;\n        el.forEach(function (el) {\n          if (first) {\n            first.after(el);\n          } else {\n            it.prepend(el);\n          }\n\n          first = el;\n        });\n        return this;\n      }\n\n      el = wrap(el);\n      var parent = el.parent();\n      this.node.insertBefore(el.node, this.node.firstChild);\n      this.add && this.add();\n      el.paper = this.paper;\n      this.parent() && this.parent().add();\n      parent && parent.add();\n    }\n\n    return this;\n  };\n  /*\\\n   * Element.prependTo\n   [ method ]\n   **\n   * Prepends the current element to the given one\n   **\n   - el (Element) parent element to prepend to\n   = (Element) the child element\n  \\*/\n\n\n  elproto.prependTo = function (el) {\n    el = wrap(el);\n    el.prepend(this);\n    return this;\n  };\n  /*\\\n   * Element.before\n   [ method ]\n   **\n   * Inserts given element before the current one\n   **\n   - el (Element) element to insert\n   = (Element) the parent element\n  \\*/\n\n\n  elproto.before = function (el) {\n    if (el.type == \"set\") {\n      var it = this;\n      el.forEach(function (el) {\n        var parent = el.parent();\n        it.node.parentNode.insertBefore(el.node, it.node);\n        parent && parent.add();\n      });\n      this.parent().add();\n      return this;\n    }\n\n    el = wrap(el);\n    var parent = el.parent();\n    this.node.parentNode.insertBefore(el.node, this.node);\n    this.parent() && this.parent().add();\n    parent && parent.add();\n    el.paper = this.paper;\n    return this;\n  };\n  /*\\\n   * Element.after\n   [ method ]\n   **\n   * Inserts given element after the current one\n   **\n   - el (Element) element to insert\n   = (Element) the parent element\n  \\*/\n\n\n  elproto.after = function (el) {\n    el = wrap(el);\n    var parent = el.parent();\n\n    if (this.node.nextSibling) {\n      this.node.parentNode.insertBefore(el.node, this.node.nextSibling);\n    } else {\n      this.node.parentNode.appendChild(el.node);\n    }\n\n    this.parent() && this.parent().add();\n    parent && parent.add();\n    el.paper = this.paper;\n    return this;\n  };\n  /*\\\n   * Element.insertBefore\n   [ method ]\n   **\n   * Inserts the element after the given one\n   **\n   - el (Element) element next to whom insert to\n   = (Element) the parent element\n  \\*/\n\n\n  elproto.insertBefore = function (el) {\n    el = wrap(el);\n    var parent = this.parent();\n    el.node.parentNode.insertBefore(this.node, el.node);\n    this.paper = el.paper;\n    parent && parent.add();\n    el.parent() && el.parent().add();\n    return this;\n  };\n  /*\\\n   * Element.insertAfter\n   [ method ]\n   **\n   * Inserts the element after the given one\n   **\n   - el (Element) element next to whom insert to\n   = (Element) the parent element\n  \\*/\n\n\n  elproto.insertAfter = function (el) {\n    el = wrap(el);\n    var parent = this.parent();\n    el.node.parentNode.insertBefore(this.node, el.node.nextSibling);\n    this.paper = el.paper;\n    parent && parent.add();\n    el.parent() && el.parent().add();\n    return this;\n  };\n  /*\\\n   * Element.remove\n   [ method ]\n   **\n   * Removes element from the DOM\n   = (Element) the detached element\n  \\*/\n\n\n  elproto.remove = function () {\n    var parent = this.parent();\n    this.node.parentNode && this.node.parentNode.removeChild(this.node);\n    delete this.paper;\n    this.removed = true;\n    parent && parent.add();\n    return this;\n  };\n  /*\\\n   * Element.select\n   [ method ]\n   **\n   * Gathers the nested @Element matching the given set of CSS selectors\n   **\n   - query (string) CSS selector\n   = (Element) result of query selection\n  \\*/\n\n\n  elproto.select = function (query) {\n    return wrap(this.node.querySelector(query));\n  };\n  /*\\\n   * Element.selectAll\n   [ method ]\n   **\n   * Gathers nested @Element objects matching the given set of CSS selectors\n   **\n   - query (string) CSS selector\n   = (Set|array) result of query selection\n  \\*/\n\n\n  elproto.selectAll = function (query) {\n    var nodelist = this.node.querySelectorAll(query),\n        set = (Snap.set || Array)();\n\n    for (var i = 0; i < nodelist.length; i++) {\n      set.push(wrap(nodelist[i]));\n    }\n\n    return set;\n  };\n  /*\\\n   * Element.asPX\n   [ method ]\n   **\n   * Returns given attribute of the element as a `px` value (not %, em, etc.)\n   **\n   - attr (string) attribute name\n   - value (string) #optional attribute value\n   = (Element) result of query selection\n  \\*/\n\n\n  elproto.asPX = function (attr, value) {\n    if (value == null) {\n      value = this.attr(attr);\n    }\n\n    return +unit2px(this, attr, value);\n  }; // SIERRA Element.use(): I suggest adding a note about how to access the original element the returned <use> instantiates. It's a part of SVG with which ordinary web developers may be least familiar.\n\n  /*\\\n   * Element.use\n   [ method ]\n   **\n   * Creates a `<use>` element linked to the current element\n   **\n   = (Element) the `<use>` element\n  \\*/\n\n\n  elproto.use = function () {\n    var use,\n        id = this.node.id;\n\n    if (!id) {\n      id = this.id;\n      $(this.node, {\n        id: id\n      });\n    }\n\n    if (this.type == \"linearGradient\" || this.type == \"radialGradient\" || this.type == \"pattern\") {\n      use = make(this.type, this.node.parentNode);\n    } else {\n      use = make(\"use\", this.node.parentNode);\n    }\n\n    $(use.node, {\n      \"xlink:href\": \"#\" + id\n    });\n    use.original = this;\n    return use;\n  };\n\n  function fixids(el) {\n    var els = el.selectAll(\"*\"),\n        it,\n        url = /^\\s*url\\((\"|'|)(.*)\\1\\)\\s*$/,\n        ids = [],\n        uses = {};\n\n    function urltest(it, name) {\n      var val = $(it.node, name);\n      val = val && val.match(url);\n      val = val && val[2];\n\n      if (val && val.charAt() == \"#\") {\n        val = val.substring(1);\n      } else {\n        return;\n      }\n\n      if (val) {\n        uses[val] = (uses[val] || []).concat(function (id) {\n          var attr = {};\n          attr[name] = Snap.url(id);\n          $(it.node, attr);\n        });\n      }\n    }\n\n    function linktest(it) {\n      var val = $(it.node, \"xlink:href\");\n\n      if (val && val.charAt() == \"#\") {\n        val = val.substring(1);\n      } else {\n        return;\n      }\n\n      if (val) {\n        uses[val] = (uses[val] || []).concat(function (id) {\n          it.attr(\"xlink:href\", \"#\" + id);\n        });\n      }\n    }\n\n    for (var i = 0, ii = els.length; i < ii; i++) {\n      it = els[i];\n      urltest(it, \"fill\");\n      urltest(it, \"stroke\");\n      urltest(it, \"filter\");\n      urltest(it, \"mask\");\n      urltest(it, \"clip-path\");\n      linktest(it);\n      var oldid = $(it.node, \"id\");\n\n      if (oldid) {\n        $(it.node, {\n          id: it.id\n        });\n        ids.push({\n          old: oldid,\n          id: it.id\n        });\n      }\n    }\n\n    for (i = 0, ii = ids.length; i < ii; i++) {\n      var fs = uses[ids[i].old];\n\n      if (fs) {\n        for (var j = 0, jj = fs.length; j < jj; j++) {\n          fs[j](ids[i].id);\n        }\n      }\n    }\n  }\n  /*\\\n   * Element.clone\n   [ method ]\n   **\n   * Creates a clone of the element and inserts it after the element\n   **\n   = (Element) the clone\n  \\*/\n\n\n  elproto.clone = function () {\n    var clone = wrap(this.node.cloneNode(true));\n\n    if ($(clone.node, \"id\")) {\n      $(clone.node, {\n        id: clone.id\n      });\n    }\n\n    fixids(clone);\n    clone.insertAfter(this);\n    return clone;\n  };\n  /*\\\n   * Element.toDefs\n   [ method ]\n   **\n   * Moves element to the shared `<defs>` area\n   **\n   = (Element) the element\n  \\*/\n\n\n  elproto.toDefs = function () {\n    var defs = getSomeDefs(this);\n    defs.appendChild(this.node);\n    return this;\n  };\n  /*\\\n   * Element.toPattern\n   [ method ]\n   **\n   * Creates a `<pattern>` element from the current element\n   **\n   * To create a pattern you have to specify the pattern rect:\n   - x (string|number)\n   - y (string|number)\n   - width (string|number)\n   - height (string|number)\n   = (Element) the `<pattern>` element\n   * You can use pattern later on as an argument for `fill` attribute:\n   | var p = paper.path(\"M10-5-10,15M15,0,0,15M0-5-20,15\").attr({\n   |         fill: \"none\",\n   |         stroke: \"#bada55\",\n   |         strokeWidth: 5\n   |     }).pattern(0, 0, 10, 10),\n   |     c = paper.circle(200, 200, 100);\n   | c.attr({\n   |     fill: p\n   | });\n  \\*/\n\n\n  elproto.pattern = elproto.toPattern = function (x, y, width, height) {\n    var p = make(\"pattern\", getSomeDefs(this));\n\n    if (x == null) {\n      x = this.getBBox();\n    }\n\n    if (is(x, \"object\") && \"x\" in x) {\n      y = x.y;\n      width = x.width;\n      height = x.height;\n      x = x.x;\n    }\n\n    $(p.node, {\n      x: x,\n      y: y,\n      width: width,\n      height: height,\n      patternUnits: \"userSpaceOnUse\",\n      id: p.id,\n      viewBox: [x, y, width, height].join(\" \")\n    });\n    p.node.appendChild(this.node);\n    return p;\n  }; // SIERRA Element.marker(): clarify what a reference point is. E.g., helps you offset the object from its edge such as when centering it over a path.\n  // SIERRA Element.marker(): I suggest the method should accept default reference point values.  Perhaps centered with (refX = width/2) and (refY = height/2)? Also, couldn't it assume the element's current _width_ and _height_? And please specify what _x_ and _y_ mean: offsets? If so, from where?  Couldn't they also be assigned default values?\n\n  /*\\\n   * Element.marker\n   [ method ]\n   **\n   * Creates a `<marker>` element from the current element\n   **\n   * To create a marker you have to specify the bounding rect and reference point:\n   - x (number)\n   - y (number)\n   - width (number)\n   - height (number)\n   - refX (number)\n   - refY (number)\n   = (Element) the `<marker>` element\n   * You can specify the marker later as an argument for `marker-start`, `marker-end`, `marker-mid`, and `marker` attributes. The `marker` attribute places the marker at every point along the path, and `marker-mid` places them at every point except the start and end.\n  \\*/\n  // TODO add usage for markers\n\n\n  elproto.marker = function (x, y, width, height, refX, refY) {\n    var p = make(\"marker\", getSomeDefs(this));\n\n    if (x == null) {\n      x = this.getBBox();\n    }\n\n    if (is(x, \"object\") && \"x\" in x) {\n      y = x.y;\n      width = x.width;\n      height = x.height;\n      refX = x.refX || x.cx;\n      refY = x.refY || x.cy;\n      x = x.x;\n    }\n\n    $(p.node, {\n      viewBox: [x, y, width, height].join(\" \"),\n      markerWidth: width,\n      markerHeight: height,\n      orient: \"auto\",\n      refX: refX || 0,\n      refY: refY || 0,\n      id: p.id\n    });\n    p.node.appendChild(this.node);\n    return p;\n  };\n\n  var eldata = {};\n  /*\\\n   * Element.data\n   [ method ]\n   **\n   * Adds or retrieves given value associated with given key. (Don’t confuse\n   * with `data-` attributes)\n   *\n   * See also @Element.removeData\n   - key (string) key to store data\n   - value (any) #optional value to store\n   = (object) @Element\n   * or, if value is not specified:\n   = (any) value\n   > Usage\n   | for (var i = 0, i < 5, i++) {\n   |     paper.circle(10 + 15 * i, 10, 10)\n   |          .attr({fill: \"#000\"})\n   |          .data(\"i\", i)\n   |          .click(function () {\n   |             alert(this.data(\"i\"));\n   |          });\n   | }\n  \\*/\n\n  elproto.data = function (key, value) {\n    var data = eldata[this.id] = eldata[this.id] || {};\n\n    if (arguments.length == 0) {\n      eve(\"snap.data.get.\" + this.id, this, data, null);\n      return data;\n    }\n\n    if (arguments.length == 1) {\n      if (Snap.is(key, \"object\")) {\n        for (var i in key) {\n          if (key[has](i)) {\n            this.data(i, key[i]);\n          }\n        }\n\n        return this;\n      }\n\n      eve(\"snap.data.get.\" + this.id, this, data[key], key);\n      return data[key];\n    }\n\n    data[key] = value;\n    eve(\"snap.data.set.\" + this.id, this, value, key);\n    return this;\n  };\n  /*\\\n   * Element.removeData\n   [ method ]\n   **\n   * Removes value associated with an element by given key.\n   * If key is not provided, removes all the data of the element.\n   - key (string) #optional key\n   = (object) @Element\n  \\*/\n\n\n  elproto.removeData = function (key) {\n    if (key == null) {\n      eldata[this.id] = {};\n    } else {\n      eldata[this.id] && delete eldata[this.id][key];\n    }\n\n    return this;\n  };\n  /*\\\n   * Element.outerSVG\n   [ method ]\n   **\n   * Returns SVG code for the element, equivalent to HTML's `outerHTML`.\n   *\n   * See also @Element.innerSVG\n   = (string) SVG code for the element\n  \\*/\n\n  /*\\\n   * Element.toString\n   [ method ]\n   **\n   * See @Element.outerSVG\n  \\*/\n\n\n  elproto.outerSVG = elproto.toString = toString(1);\n  /*\\\n   * Element.innerSVG\n   [ method ]\n   **\n   * Returns SVG code for the element's contents, equivalent to HTML's `innerHTML`\n   = (string) SVG code for the element\n  \\*/\n\n  elproto.innerSVG = toString();\n\n  function toString(type) {\n    return function () {\n      var res = type ? \"<\" + this.type : \"\",\n          attr = this.node.attributes,\n          chld = this.node.childNodes;\n\n      if (type) {\n        for (var i = 0, ii = attr.length; i < ii; i++) {\n          res += \" \" + attr[i].name + '=\"' + attr[i].value.replace(/\"/g, '\\\\\"') + '\"';\n        }\n      }\n\n      if (chld.length) {\n        type && (res += \">\");\n\n        for (i = 0, ii = chld.length; i < ii; i++) {\n          if (chld[i].nodeType == 3) {\n            res += chld[i].nodeValue;\n          } else if (chld[i].nodeType == 1) {\n            res += wrap(chld[i]).toString();\n          }\n        }\n\n        type && (res += \"</\" + this.type + \">\");\n      } else {\n        type && (res += \"/>\");\n      }\n\n      return res;\n    };\n  }\n\n  elproto.toDataURL = function () {\n    if (window && window.btoa) {\n      var bb = this.getBBox(),\n          svg = Snap.format('<svg version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"{width}\" height=\"{height}\" viewBox=\"{x} {y} {width} {height}\">{contents}</svg>', {\n        x: +bb.x.toFixed(3),\n        y: +bb.y.toFixed(3),\n        width: +bb.width.toFixed(3),\n        height: +bb.height.toFixed(3),\n        contents: this.outerSVG()\n      });\n      return \"data:image/svg+xml;base64,\" + btoa(unescape(encodeURIComponent(svg)));\n    }\n  };\n  /*\\\n   * Fragment.select\n   [ method ]\n   **\n   * See @Element.select\n  \\*/\n\n\n  Fragment.prototype.select = elproto.select;\n  /*\\\n   * Fragment.selectAll\n   [ method ]\n   **\n   * See @Element.selectAll\n  \\*/\n\n  Fragment.prototype.selectAll = elproto.selectAll;\n}); // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nSnap.plugin(function (Snap, Element, Paper, glob, Fragment) {\n  var objectToString = Object.prototype.toString,\n      Str = String,\n      math = Math,\n      E = \"\";\n\n  function Matrix(a, b, c, d, e, f) {\n    if (b == null && objectToString.call(a) == \"[object SVGMatrix]\") {\n      this.a = a.a;\n      this.b = a.b;\n      this.c = a.c;\n      this.d = a.d;\n      this.e = a.e;\n      this.f = a.f;\n      return;\n    }\n\n    if (a != null) {\n      this.a = +a;\n      this.b = +b;\n      this.c = +c;\n      this.d = +d;\n      this.e = +e;\n      this.f = +f;\n    } else {\n      this.a = 1;\n      this.b = 0;\n      this.c = 0;\n      this.d = 1;\n      this.e = 0;\n      this.f = 0;\n    }\n  }\n\n  (function (matrixproto) {\n    /*\\\n     * Matrix.add\n     [ method ]\n     **\n     * Adds the given matrix to existing one\n     - a (number)\n     - b (number)\n     - c (number)\n     - d (number)\n     - e (number)\n     - f (number)\n     * or\n     - matrix (object) @Matrix\n    \\*/\n    matrixproto.add = function (a, b, c, d, e, f) {\n      if (a && a instanceof Matrix) {\n        return this.add(a.a, a.b, a.c, a.d, a.e, a.f);\n      }\n\n      var aNew = a * this.a + b * this.c,\n          bNew = a * this.b + b * this.d;\n      this.e += e * this.a + f * this.c;\n      this.f += e * this.b + f * this.d;\n      this.c = c * this.a + d * this.c;\n      this.d = c * this.b + d * this.d;\n      this.a = aNew;\n      this.b = bNew;\n      return this;\n    };\n    /*\\\n     * Matrix.multLeft\n     [ method ]\n     **\n     * Multiplies a passed affine transform to the left: M * this.\n     - a (number)\n     - b (number)\n     - c (number)\n     - d (number)\n     - e (number)\n     - f (number)\n     * or\n     - matrix (object) @Matrix\n    \\*/\n\n\n    Matrix.prototype.multLeft = function (a, b, c, d, e, f) {\n      if (a && a instanceof Matrix) {\n        return this.multLeft(a.a, a.b, a.c, a.d, a.e, a.f);\n      }\n\n      var aNew = a * this.a + c * this.b,\n          cNew = a * this.c + c * this.d,\n          eNew = a * this.e + c * this.f + e;\n      this.b = b * this.a + d * this.b;\n      this.d = b * this.c + d * this.d;\n      this.f = b * this.e + d * this.f + f;\n      this.a = aNew;\n      this.c = cNew;\n      this.e = eNew;\n      return this;\n    };\n    /*\\\n     * Matrix.invert\n     [ method ]\n     **\n     * Returns an inverted version of the matrix\n     = (object) @Matrix\n    \\*/\n\n\n    matrixproto.invert = function () {\n      var me = this,\n          x = me.a * me.d - me.b * me.c;\n      return new Matrix(me.d / x, -me.b / x, -me.c / x, me.a / x, (me.c * me.f - me.d * me.e) / x, (me.b * me.e - me.a * me.f) / x);\n    };\n    /*\\\n     * Matrix.clone\n     [ method ]\n     **\n     * Returns a copy of the matrix\n     = (object) @Matrix\n    \\*/\n\n\n    matrixproto.clone = function () {\n      return new Matrix(this.a, this.b, this.c, this.d, this.e, this.f);\n    };\n    /*\\\n     * Matrix.translate\n     [ method ]\n     **\n     * Translate the matrix\n     - x (number) horizontal offset distance\n     - y (number) vertical offset distance\n    \\*/\n\n\n    matrixproto.translate = function (x, y) {\n      this.e += x * this.a + y * this.c;\n      this.f += x * this.b + y * this.d;\n      return this;\n    };\n    /*\\\n     * Matrix.scale\n     [ method ]\n     **\n     * Scales the matrix\n     - x (number) amount to be scaled, with `1` resulting in no change\n     - y (number) #optional amount to scale along the vertical axis. (Otherwise `x` applies to both axes.)\n     - cx (number) #optional horizontal origin point from which to scale\n     - cy (number) #optional vertical origin point from which to scale\n     * Default cx, cy is the middle point of the element.\n    \\*/\n\n\n    matrixproto.scale = function (x, y, cx, cy) {\n      y == null && (y = x);\n      (cx || cy) && this.translate(cx, cy);\n      this.a *= x;\n      this.b *= x;\n      this.c *= y;\n      this.d *= y;\n      (cx || cy) && this.translate(-cx, -cy);\n      return this;\n    };\n    /*\\\n     * Matrix.rotate\n     [ method ]\n     **\n     * Rotates the matrix\n     - a (number) angle of rotation, in degrees\n     - x (number) horizontal origin point from which to rotate\n     - y (number) vertical origin point from which to rotate\n    \\*/\n\n\n    matrixproto.rotate = function (a, x, y) {\n      a = Snap.rad(a);\n      x = x || 0;\n      y = y || 0;\n      var cos = +math.cos(a).toFixed(9),\n          sin = +math.sin(a).toFixed(9);\n      this.add(cos, sin, -sin, cos, x, y);\n      return this.add(1, 0, 0, 1, -x, -y);\n    };\n    /*\\\n     * Matrix.skewX\n     [ method ]\n     **\n     * Skews the matrix along the x-axis\n     - x (number) Angle to skew along the x-axis (in degrees).\n    \\*/\n\n\n    matrixproto.skewX = function (x) {\n      return this.skew(x, 0);\n    };\n    /*\\\n     * Matrix.skewY\n     [ method ]\n     **\n     * Skews the matrix along the y-axis\n     - y (number) Angle to skew along the y-axis (in degrees).\n    \\*/\n\n\n    matrixproto.skewY = function (y) {\n      return this.skew(0, y);\n    };\n    /*\\\n     * Matrix.skew\n     [ method ]\n     **\n     * Skews the matrix\n     - y (number) Angle to skew along the y-axis (in degrees).\n     - x (number) Angle to skew along the x-axis (in degrees).\n    \\*/\n\n\n    matrixproto.skew = function (x, y) {\n      x = x || 0;\n      y = y || 0;\n      x = Snap.rad(x);\n      y = Snap.rad(y);\n      var c = math.tan(x).toFixed(9);\n      var b = math.tan(y).toFixed(9);\n      return this.add(1, b, c, 1, 0, 0);\n    };\n    /*\\\n     * Matrix.x\n     [ method ]\n     **\n     * Returns x coordinate for given point after transformation described by the matrix. See also @Matrix.y\n     - x (number)\n     - y (number)\n     = (number) x\n    \\*/\n\n\n    matrixproto.x = function (x, y) {\n      return x * this.a + y * this.c + this.e;\n    };\n    /*\\\n     * Matrix.y\n     [ method ]\n     **\n     * Returns y coordinate for given point after transformation described by the matrix. See also @Matrix.x\n     - x (number)\n     - y (number)\n     = (number) y\n    \\*/\n\n\n    matrixproto.y = function (x, y) {\n      return x * this.b + y * this.d + this.f;\n    };\n\n    matrixproto.get = function (i) {\n      return +this[Str.fromCharCode(97 + i)].toFixed(4);\n    };\n\n    matrixproto.toString = function () {\n      return \"matrix(\" + [this.get(0), this.get(1), this.get(2), this.get(3), this.get(4), this.get(5)].join() + \")\";\n    };\n\n    matrixproto.offset = function () {\n      return [this.e.toFixed(4), this.f.toFixed(4)];\n    };\n\n    function norm(a) {\n      return a[0] * a[0] + a[1] * a[1];\n    }\n\n    function normalize(a) {\n      var mag = math.sqrt(norm(a));\n      a[0] && (a[0] /= mag);\n      a[1] && (a[1] /= mag);\n    }\n    /*\\\n     * Matrix.determinant\n     [ method ]\n     **\n     * Finds determinant of the given matrix.\n     = (number) determinant\n    \\*/\n\n\n    matrixproto.determinant = function () {\n      return this.a * this.d - this.b * this.c;\n    };\n    /*\\\n     * Matrix.split\n     [ method ]\n     **\n     * Splits matrix into primitive transformations\n     = (object) in format:\n     o dx (number) translation by x\n     o dy (number) translation by y\n     o scalex (number) scale by x\n     o scaley (number) scale by y\n     o shear (number) shear\n     o rotate (number) rotation in deg\n     o isSimple (boolean) could it be represented via simple transformations\n    \\*/\n\n\n    matrixproto.split = function () {\n      var out = {}; // translation\n\n      out.dx = this.e;\n      out.dy = this.f; // scale and shear\n\n      var row = [[this.a, this.b], [this.c, this.d]];\n      out.scalex = math.sqrt(norm(row[0]));\n      normalize(row[0]);\n      out.shear = row[0][0] * row[1][0] + row[0][1] * row[1][1];\n      row[1] = [row[1][0] - row[0][0] * out.shear, row[1][1] - row[0][1] * out.shear];\n      out.scaley = math.sqrt(norm(row[1]));\n      normalize(row[1]);\n      out.shear /= out.scaley;\n\n      if (this.determinant() < 0) {\n        out.scalex = -out.scalex;\n      } // rotation\n\n\n      var sin = row[0][1],\n          cos = row[1][1];\n\n      if (cos < 0) {\n        out.rotate = Snap.deg(math.acos(cos));\n\n        if (sin < 0) {\n          out.rotate = 360 - out.rotate;\n        }\n      } else {\n        out.rotate = Snap.deg(math.asin(sin));\n      }\n\n      out.isSimple = !+out.shear.toFixed(9) && (out.scalex.toFixed(9) == out.scaley.toFixed(9) || !out.rotate);\n      out.isSuperSimple = !+out.shear.toFixed(9) && out.scalex.toFixed(9) == out.scaley.toFixed(9) && !out.rotate;\n      out.noRotation = !+out.shear.toFixed(9) && !out.rotate;\n      return out;\n    };\n    /*\\\n     * Matrix.toTransformString\n     [ method ]\n     **\n     * Returns transform string that represents given matrix\n     = (string) transform string\n    \\*/\n\n\n    matrixproto.toTransformString = function (shorter) {\n      var s = shorter || this.split();\n\n      if (!+s.shear.toFixed(9)) {\n        s.scalex = +s.scalex.toFixed(4);\n        s.scaley = +s.scaley.toFixed(4);\n        s.rotate = +s.rotate.toFixed(4);\n        return (s.dx || s.dy ? \"t\" + [+s.dx.toFixed(4), +s.dy.toFixed(4)] : E) + (s.rotate ? \"r\" + [+s.rotate.toFixed(4), 0, 0] : E) + (s.scalex != 1 || s.scaley != 1 ? \"s\" + [s.scalex, s.scaley, 0, 0] : E);\n      } else {\n        return \"m\" + [this.get(0), this.get(1), this.get(2), this.get(3), this.get(4), this.get(5)];\n      }\n    };\n  })(Matrix.prototype);\n  /*\\\n   * Snap.Matrix\n   [ method ]\n   **\n   * Matrix constructor, extend on your own risk.\n   * To create matrices use @Snap.matrix.\n  \\*/\n\n\n  Snap.Matrix = Matrix;\n  /*\\\n   * Snap.matrix\n   [ method ]\n   **\n   * Utility method\n   **\n   * Returns a matrix based on the given parameters\n   - a (number)\n   - b (number)\n   - c (number)\n   - d (number)\n   - e (number)\n   - f (number)\n   * or\n   - svgMatrix (SVGMatrix)\n   = (object) @Matrix\n  \\*/\n\n  Snap.matrix = function (a, b, c, d, e, f) {\n    return new Matrix(a, b, c, d, e, f);\n  };\n}); // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nSnap.plugin(function (Snap, Element, Paper, glob, Fragment) {\n  var has = \"hasOwnProperty\",\n      make = Snap._.make,\n      wrap = Snap._.wrap,\n      is = Snap.is,\n      getSomeDefs = Snap._.getSomeDefs,\n      reURLValue = /^url\\((['\"]?)([^)]+)\\1\\)$/,\n      $ = Snap._.$,\n      URL = Snap.url,\n      Str = String,\n      separator = Snap._.separator,\n      E = \"\";\n  /*\\\n   * Snap.deurl\n   [ method ]\n   **\n   * Unwraps path from `\"url(<path>)\"`.\n   - value (string) url path\n   = (string) unwrapped path\n  \\*/\n\n  Snap.deurl = function (value) {\n    var res = String(value).match(reURLValue);\n    return res ? res[2] : value;\n  }; // Attributes event handlers\n\n\n  eve.on(\"snap.util.attr.mask\", function (value) {\n    if (value instanceof Element || value instanceof Fragment) {\n      eve.stop();\n\n      if (value instanceof Fragment && value.node.childNodes.length == 1) {\n        value = value.node.firstChild;\n        getSomeDefs(this).appendChild(value);\n        value = wrap(value);\n      }\n\n      if (value.type == \"mask\") {\n        var mask = value;\n      } else {\n        mask = make(\"mask\", getSomeDefs(this));\n        mask.node.appendChild(value.node);\n      }\n\n      !mask.node.id && $(mask.node, {\n        id: mask.id\n      });\n      $(this.node, {\n        mask: URL(mask.id)\n      });\n    }\n  });\n\n  (function (clipIt) {\n    eve.on(\"snap.util.attr.clip\", clipIt);\n    eve.on(\"snap.util.attr.clip-path\", clipIt);\n    eve.on(\"snap.util.attr.clipPath\", clipIt);\n  })(function (value) {\n    if (value instanceof Element || value instanceof Fragment) {\n      eve.stop();\n      var clip,\n          node = value.node;\n\n      while (node) {\n        if (node.nodeName === \"clipPath\") {\n          clip = new Element(node);\n          break;\n        }\n\n        if (node.nodeName === \"svg\") {\n          clip = undefined;\n          break;\n        }\n\n        node = node.parentNode;\n      }\n\n      if (!clip) {\n        clip = make(\"clipPath\", getSomeDefs(this));\n        clip.node.appendChild(value.node);\n        !clip.node.id && $(clip.node, {\n          id: clip.id\n        });\n      }\n\n      $(this.node, {\n        \"clip-path\": URL(clip.node.id || clip.id)\n      });\n    }\n  });\n\n  function fillStroke(name) {\n    return function (value) {\n      eve.stop();\n\n      if (value instanceof Fragment && value.node.childNodes.length == 1 && (value.node.firstChild.tagName == \"radialGradient\" || value.node.firstChild.tagName == \"linearGradient\" || value.node.firstChild.tagName == \"pattern\")) {\n        value = value.node.firstChild;\n        getSomeDefs(this).appendChild(value);\n        value = wrap(value);\n      }\n\n      if (value instanceof Element) {\n        if (value.type == \"radialGradient\" || value.type == \"linearGradient\" || value.type == \"pattern\") {\n          if (!value.node.id) {\n            $(value.node, {\n              id: value.id\n            });\n          }\n\n          var fill = URL(value.node.id);\n        } else {\n          fill = value.attr(name);\n        }\n      } else {\n        fill = Snap.color(value);\n\n        if (fill.error) {\n          var grad = Snap(getSomeDefs(this).ownerSVGElement).gradient(value);\n\n          if (grad) {\n            if (!grad.node.id) {\n              $(grad.node, {\n                id: grad.id\n              });\n            }\n\n            fill = URL(grad.node.id);\n          } else {\n            fill = value;\n          }\n        } else {\n          fill = Str(fill);\n        }\n      }\n\n      var attrs = {};\n      attrs[name] = fill;\n      $(this.node, attrs);\n      this.node.style[name] = E;\n    };\n  }\n\n  eve.on(\"snap.util.attr.fill\", fillStroke(\"fill\"));\n  eve.on(\"snap.util.attr.stroke\", fillStroke(\"stroke\"));\n  var gradrg = /^([lr])(?:\\(([^)]*)\\))?(.*)$/i;\n  eve.on(\"snap.util.grad.parse\", function parseGrad(string) {\n    string = Str(string);\n    var tokens = string.match(gradrg);\n\n    if (!tokens) {\n      return null;\n    }\n\n    var type = tokens[1],\n        params = tokens[2],\n        stops = tokens[3];\n    params = params.split(/\\s*,\\s*/).map(function (el) {\n      return +el == el ? +el : el;\n    });\n\n    if (params.length == 1 && params[0] == 0) {\n      params = [];\n    }\n\n    stops = stops.split(\"-\");\n    stops = stops.map(function (el) {\n      el = el.split(\":\");\n      var out = {\n        color: el[0]\n      };\n\n      if (el[1]) {\n        out.offset = parseFloat(el[1]);\n      }\n\n      return out;\n    });\n    var len = stops.length,\n        start = 0,\n        j = 0;\n\n    function seed(i, end) {\n      var step = (end - start) / (i - j);\n\n      for (var k = j; k < i; k++) {\n        stops[k].offset = +(+start + step * (k - j)).toFixed(2);\n      }\n\n      j = i;\n      start = end;\n    }\n\n    len--;\n\n    for (var i = 0; i < len; i++) {\n      if (\"offset\" in stops[i]) {\n        seed(i, stops[i].offset);\n      }\n    }\n\n    stops[len].offset = stops[len].offset || 100;\n    seed(len, stops[len].offset);\n    return {\n      type: type,\n      params: params,\n      stops: stops\n    };\n  });\n  eve.on(\"snap.util.attr.d\", function (value) {\n    eve.stop();\n\n    if (is(value, \"array\") && is(value[0], \"array\")) {\n      value = Snap.path.toString.call(value);\n    }\n\n    value = Str(value);\n\n    if (value.match(/[ruo]/i)) {\n      value = Snap.path.toAbsolute(value);\n    }\n\n    $(this.node, {\n      d: value\n    });\n  })(-1);\n  eve.on(\"snap.util.attr.#text\", function (value) {\n    eve.stop();\n    value = Str(value);\n    var txt = glob.doc.createTextNode(value);\n\n    while (this.node.firstChild) {\n      this.node.removeChild(this.node.firstChild);\n    }\n\n    this.node.appendChild(txt);\n  })(-1);\n  eve.on(\"snap.util.attr.path\", function (value) {\n    eve.stop();\n    this.attr({\n      d: value\n    });\n  })(-1);\n  eve.on(\"snap.util.attr.class\", function (value) {\n    eve.stop();\n    this.node.className.baseVal = value;\n  })(-1);\n  eve.on(\"snap.util.attr.viewBox\", function (value) {\n    var vb;\n\n    if (is(value, \"object\") && \"x\" in value) {\n      vb = [value.x, value.y, value.width, value.height].join(\" \");\n    } else if (is(value, \"array\")) {\n      vb = value.join(\" \");\n    } else {\n      vb = value;\n    }\n\n    $(this.node, {\n      viewBox: vb\n    });\n    eve.stop();\n  })(-1);\n  eve.on(\"snap.util.attr.transform\", function (value) {\n    this.transform(value);\n    eve.stop();\n  })(-1);\n  eve.on(\"snap.util.attr.r\", function (value) {\n    if (this.type == \"rect\") {\n      eve.stop();\n      $(this.node, {\n        rx: value,\n        ry: value\n      });\n    }\n  })(-1);\n  eve.on(\"snap.util.attr.textpath\", function (value) {\n    eve.stop();\n\n    if (this.type == \"text\") {\n      var id, tp, node;\n\n      if (!value && this.textPath) {\n        tp = this.textPath;\n\n        while (tp.node.firstChild) {\n          this.node.appendChild(tp.node.firstChild);\n        }\n\n        tp.remove();\n        delete this.textPath;\n        return;\n      }\n\n      if (is(value, \"string\")) {\n        var defs = getSomeDefs(this),\n            path = wrap(defs.parentNode).path(value);\n        defs.appendChild(path.node);\n        id = path.id;\n        path.attr({\n          id: id\n        });\n      } else {\n        value = wrap(value);\n\n        if (value instanceof Element) {\n          id = value.attr(\"id\");\n\n          if (!id) {\n            id = value.id;\n            value.attr({\n              id: id\n            });\n          }\n        }\n      }\n\n      if (id) {\n        tp = this.textPath;\n        node = this.node;\n\n        if (tp) {\n          tp.attr({\n            \"xlink:href\": \"#\" + id\n          });\n        } else {\n          tp = $(\"textPath\", {\n            \"xlink:href\": \"#\" + id\n          });\n\n          while (node.firstChild) {\n            tp.appendChild(node.firstChild);\n          }\n\n          node.appendChild(tp);\n          this.textPath = wrap(tp);\n        }\n      }\n    }\n  })(-1);\n  eve.on(\"snap.util.attr.text\", function (value) {\n    if (this.type == \"text\") {\n      var i = 0,\n          node = this.node,\n          tuner = function tuner(chunk) {\n        var out = $(\"tspan\");\n\n        if (is(chunk, \"array\")) {\n          for (var i = 0; i < chunk.length; i++) {\n            out.appendChild(tuner(chunk[i]));\n          }\n        } else {\n          out.appendChild(glob.doc.createTextNode(chunk));\n        }\n\n        out.normalize && out.normalize();\n        return out;\n      };\n\n      while (node.firstChild) {\n        node.removeChild(node.firstChild);\n      }\n\n      var tuned = tuner(value);\n\n      while (tuned.firstChild) {\n        node.appendChild(tuned.firstChild);\n      }\n    }\n\n    eve.stop();\n  })(-1);\n\n  function setFontSize(value) {\n    eve.stop();\n\n    if (value == +value) {\n      value += \"px\";\n    }\n\n    this.node.style.fontSize = value;\n  }\n\n  eve.on(\"snap.util.attr.fontSize\", setFontSize)(-1);\n  eve.on(\"snap.util.attr.font-size\", setFontSize)(-1);\n  eve.on(\"snap.util.getattr.transform\", function () {\n    eve.stop();\n    return this.transform();\n  })(-1);\n  eve.on(\"snap.util.getattr.textpath\", function () {\n    eve.stop();\n    return this.textPath;\n  })(-1); // Markers\n\n  (function () {\n    function getter(end) {\n      return function () {\n        eve.stop();\n        var style = glob.doc.defaultView.getComputedStyle(this.node, null).getPropertyValue(\"marker-\" + end);\n\n        if (style == \"none\") {\n          return style;\n        } else {\n          return Snap(glob.doc.getElementById(style.match(reURLValue)[1]));\n        }\n      };\n    }\n\n    function setter(end) {\n      return function (value) {\n        eve.stop();\n        var name = \"marker\" + end.charAt(0).toUpperCase() + end.substring(1);\n\n        if (value == \"\" || !value) {\n          this.node.style[name] = \"none\";\n          return;\n        }\n\n        if (value.type == \"marker\") {\n          var id = value.node.id;\n\n          if (!id) {\n            $(value.node, {\n              id: value.id\n            });\n          }\n\n          this.node.style[name] = URL(id);\n          return;\n        }\n      };\n    }\n\n    eve.on(\"snap.util.getattr.marker-end\", getter(\"end\"))(-1);\n    eve.on(\"snap.util.getattr.markerEnd\", getter(\"end\"))(-1);\n    eve.on(\"snap.util.getattr.marker-start\", getter(\"start\"))(-1);\n    eve.on(\"snap.util.getattr.markerStart\", getter(\"start\"))(-1);\n    eve.on(\"snap.util.getattr.marker-mid\", getter(\"mid\"))(-1);\n    eve.on(\"snap.util.getattr.markerMid\", getter(\"mid\"))(-1);\n    eve.on(\"snap.util.attr.marker-end\", setter(\"end\"))(-1);\n    eve.on(\"snap.util.attr.markerEnd\", setter(\"end\"))(-1);\n    eve.on(\"snap.util.attr.marker-start\", setter(\"start\"))(-1);\n    eve.on(\"snap.util.attr.markerStart\", setter(\"start\"))(-1);\n    eve.on(\"snap.util.attr.marker-mid\", setter(\"mid\"))(-1);\n    eve.on(\"snap.util.attr.markerMid\", setter(\"mid\"))(-1);\n  })();\n\n  eve.on(\"snap.util.getattr.r\", function () {\n    if (this.type == \"rect\" && $(this.node, \"rx\") == $(this.node, \"ry\")) {\n      eve.stop();\n      return $(this.node, \"rx\");\n    }\n  })(-1);\n\n  function textExtract(node) {\n    var out = [];\n    var children = node.childNodes;\n\n    for (var i = 0, ii = children.length; i < ii; i++) {\n      var chi = children[i];\n\n      if (chi.nodeType == 3) {\n        out.push(chi.nodeValue);\n      }\n\n      if (chi.tagName == \"tspan\") {\n        if (chi.childNodes.length == 1 && chi.firstChild.nodeType == 3) {\n          out.push(chi.firstChild.nodeValue);\n        } else {\n          out.push(textExtract(chi));\n        }\n      }\n    }\n\n    return out;\n  }\n\n  eve.on(\"snap.util.getattr.text\", function () {\n    if (this.type == \"text\" || this.type == \"tspan\") {\n      eve.stop();\n      var out = textExtract(this.node);\n      return out.length == 1 ? out[0] : out;\n    }\n  })(-1);\n  eve.on(\"snap.util.getattr.#text\", function () {\n    return this.node.textContent;\n  })(-1);\n  eve.on(\"snap.util.getattr.fill\", function (internal) {\n    if (internal) {\n      return;\n    }\n\n    eve.stop();\n    var value = eve(\"snap.util.getattr.fill\", this, true).firstDefined();\n    return Snap(Snap.deurl(value)) || value;\n  })(-1);\n  eve.on(\"snap.util.getattr.stroke\", function (internal) {\n    if (internal) {\n      return;\n    }\n\n    eve.stop();\n    var value = eve(\"snap.util.getattr.stroke\", this, true).firstDefined();\n    return Snap(Snap.deurl(value)) || value;\n  })(-1);\n  eve.on(\"snap.util.getattr.viewBox\", function () {\n    eve.stop();\n    var vb = $(this.node, \"viewBox\");\n\n    if (vb) {\n      vb = vb.split(separator);\n      return Snap._.box(+vb[0], +vb[1], +vb[2], +vb[3]);\n    } else {\n      return;\n    }\n  })(-1);\n  eve.on(\"snap.util.getattr.points\", function () {\n    var p = $(this.node, \"points\");\n    eve.stop();\n\n    if (p) {\n      return p.split(separator);\n    } else {\n      return;\n    }\n  })(-1);\n  eve.on(\"snap.util.getattr.path\", function () {\n    var p = $(this.node, \"d\");\n    eve.stop();\n    return p;\n  })(-1);\n  eve.on(\"snap.util.getattr.class\", function () {\n    return this.node.className.baseVal;\n  })(-1);\n\n  function getFontSize() {\n    eve.stop();\n    return this.node.style.fontSize;\n  }\n\n  eve.on(\"snap.util.getattr.fontSize\", getFontSize)(-1);\n  eve.on(\"snap.util.getattr.font-size\", getFontSize)(-1);\n}); // Copyright (c) 2014 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nSnap.plugin(function (Snap, Element, Paper, glob, Fragment) {\n  var rgNotSpace = /\\S+/g,\n      rgBadSpace = /[\\t\\r\\n\\f]/g,\n      rgTrim = /(^\\s+|\\s+$)/g,\n      Str = String,\n      elproto = Element.prototype;\n  /*\\\n   * Element.addClass\n   [ method ]\n   **\n   * Adds given class name or list of class names to the element.\n   - value (string) class name or space separated list of class names\n   **\n   = (Element) original element.\n  \\*/\n\n  elproto.addClass = function (value) {\n    var classes = Str(value || \"\").match(rgNotSpace) || [],\n        elem = this.node,\n        className = elem.className.baseVal,\n        curClasses = className.match(rgNotSpace) || [],\n        j,\n        pos,\n        clazz,\n        finalValue;\n\n    if (classes.length) {\n      j = 0;\n\n      while (clazz = classes[j++]) {\n        pos = curClasses.indexOf(clazz);\n\n        if (!~pos) {\n          curClasses.push(clazz);\n        }\n      }\n\n      finalValue = curClasses.join(\" \");\n\n      if (className != finalValue) {\n        elem.className.baseVal = finalValue;\n      }\n    }\n\n    return this;\n  };\n  /*\\\n   * Element.removeClass\n   [ method ]\n   **\n   * Removes given class name or list of class names from the element.\n   - value (string) class name or space separated list of class names\n   **\n   = (Element) original element.\n  \\*/\n\n\n  elproto.removeClass = function (value) {\n    var classes = Str(value || \"\").match(rgNotSpace) || [],\n        elem = this.node,\n        className = elem.className.baseVal,\n        curClasses = className.match(rgNotSpace) || [],\n        j,\n        pos,\n        clazz,\n        finalValue;\n\n    if (curClasses.length) {\n      j = 0;\n\n      while (clazz = classes[j++]) {\n        pos = curClasses.indexOf(clazz);\n\n        if (~pos) {\n          curClasses.splice(pos, 1);\n        }\n      }\n\n      finalValue = curClasses.join(\" \");\n\n      if (className != finalValue) {\n        elem.className.baseVal = finalValue;\n      }\n    }\n\n    return this;\n  };\n  /*\\\n   * Element.hasClass\n   [ method ]\n   **\n   * Checks if the element has a given class name in the list of class names applied to it.\n   - value (string) class name\n   **\n   = (boolean) `true` if the element has given class\n  \\*/\n\n\n  elproto.hasClass = function (value) {\n    var elem = this.node,\n        className = elem.className.baseVal,\n        curClasses = className.match(rgNotSpace) || [];\n    return !!~curClasses.indexOf(value);\n  };\n  /*\\\n   * Element.toggleClass\n   [ method ]\n   **\n   * Add or remove one or more classes from the element, depending on either\n   * the class’s presence or the value of the `flag` argument.\n   - value (string) class name or space separated list of class names\n   - flag (boolean) value to determine whether the class should be added or removed\n   **\n   = (Element) original element.\n  \\*/\n\n\n  elproto.toggleClass = function (value, flag) {\n    if (flag != null) {\n      if (flag) {\n        return this.addClass(value);\n      } else {\n        return this.removeClass(value);\n      }\n    }\n\n    var classes = (value || \"\").match(rgNotSpace) || [],\n        elem = this.node,\n        className = elem.className.baseVal,\n        curClasses = className.match(rgNotSpace) || [],\n        j,\n        pos,\n        clazz,\n        finalValue;\n    j = 0;\n\n    while (clazz = classes[j++]) {\n      pos = curClasses.indexOf(clazz);\n\n      if (~pos) {\n        curClasses.splice(pos, 1);\n      } else {\n        curClasses.push(clazz);\n      }\n    }\n\n    finalValue = curClasses.join(\" \");\n\n    if (className != finalValue) {\n      elem.className.baseVal = finalValue;\n    }\n\n    return this;\n  };\n}); // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nSnap.plugin(function (Snap, Element, Paper, glob, Fragment) {\n  var operators = {\n    \"+\": function _(x, y) {\n      return x + y;\n    },\n    \"-\": function _(x, y) {\n      return x - y;\n    },\n    \"/\": function _(x, y) {\n      return x / y;\n    },\n    \"*\": function _(x, y) {\n      return x * y;\n    }\n  },\n      Str = String,\n      reUnit = /[a-z]+$/i,\n      reAddon = /^\\s*([+\\-\\/*])\\s*=\\s*([\\d.eE+\\-]+)\\s*([^\\d\\s]+)?\\s*$/;\n\n  function getNumber(val) {\n    return val;\n  }\n\n  function getUnit(unit) {\n    return function (val) {\n      return +val.toFixed(3) + unit;\n    };\n  }\n\n  eve.on(\"snap.util.attr\", function (val) {\n    var plus = Str(val).match(reAddon);\n\n    if (plus) {\n      var evnt = eve.nt(),\n          name = evnt.substring(evnt.lastIndexOf(\".\") + 1),\n          a = this.attr(name),\n          atr = {};\n      eve.stop();\n      var unit = plus[3] || \"\",\n          aUnit = a.match(reUnit),\n          op = operators[plus[1]];\n\n      if (aUnit && aUnit == unit) {\n        val = op(parseFloat(a), +plus[2]);\n      } else {\n        a = this.asPX(name);\n        val = op(this.asPX(name), this.asPX(name, plus[2] + unit));\n      }\n\n      if (isNaN(a) || isNaN(val)) {\n        return;\n      }\n\n      atr[name] = val;\n      this.attr(atr);\n    }\n  })(-10);\n  eve.on(\"snap.util.equal\", function (name, b) {\n    var A,\n        B,\n        a = Str(this.attr(name) || \"\"),\n        el = this,\n        bplus = Str(b).match(reAddon);\n\n    if (bplus) {\n      eve.stop();\n      var unit = bplus[3] || \"\",\n          aUnit = a.match(reUnit),\n          op = operators[bplus[1]];\n\n      if (aUnit && aUnit == unit) {\n        return {\n          from: parseFloat(a),\n          to: op(parseFloat(a), +bplus[2]),\n          f: getUnit(aUnit)\n        };\n      } else {\n        a = this.asPX(name);\n        return {\n          from: a,\n          to: op(a, this.asPX(name, bplus[2] + unit)),\n          f: getNumber\n        };\n      }\n    }\n  })(-10);\n}); // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nSnap.plugin(function (Snap, Element, Paper, glob, Fragment) {\n  var proto = Paper.prototype,\n      is = Snap.is;\n  /*\\\n   * Paper.rect\n   [ method ]\n   *\n   * Draws a rectangle\n   **\n   - x (number) x coordinate of the top left corner\n   - y (number) y coordinate of the top left corner\n   - width (number) width\n   - height (number) height\n   - rx (number) #optional horizontal radius for rounded corners, default is 0\n   - ry (number) #optional vertical radius for rounded corners, default is rx or 0\n   = (object) the `rect` element\n   **\n   > Usage\n   | // regular rectangle\n   | var c = paper.rect(10, 10, 50, 50);\n   | // rectangle with rounded corners\n   | var c = paper.rect(40, 40, 50, 50, 10);\n  \\*/\n\n  proto.rect = function (x, y, w, h, rx, ry) {\n    var attr;\n\n    if (ry == null) {\n      ry = rx;\n    }\n\n    if (is(x, \"object\") && x == \"[object Object]\") {\n      attr = x;\n    } else if (x != null) {\n      attr = {\n        x: x,\n        y: y,\n        width: w,\n        height: h\n      };\n\n      if (rx != null) {\n        attr.rx = rx;\n        attr.ry = ry;\n      }\n    }\n\n    return this.el(\"rect\", attr);\n  };\n  /*\\\n   * Paper.circle\n   [ method ]\n   **\n   * Draws a circle\n   **\n   - x (number) x coordinate of the centre\n   - y (number) y coordinate of the centre\n   - r (number) radius\n   = (object) the `circle` element\n   **\n   > Usage\n   | var c = paper.circle(50, 50, 40);\n  \\*/\n\n\n  proto.circle = function (cx, cy, r) {\n    var attr;\n\n    if (is(cx, \"object\") && cx == \"[object Object]\") {\n      attr = cx;\n    } else if (cx != null) {\n      attr = {\n        cx: cx,\n        cy: cy,\n        r: r\n      };\n    }\n\n    return this.el(\"circle\", attr);\n  };\n\n  var preload = function () {\n    function onerror() {\n      this.parentNode.removeChild(this);\n    }\n\n    return function (src, f) {\n      var img = glob.doc.createElement(\"img\"),\n          body = glob.doc.body;\n      img.style.cssText = \"position:absolute;left:-9999em;top:-9999em\";\n\n      img.onload = function () {\n        f.call(img);\n        img.onload = img.onerror = null;\n        body.removeChild(img);\n      };\n\n      img.onerror = onerror;\n      body.appendChild(img);\n      img.src = src;\n    };\n  }();\n  /*\\\n   * Paper.image\n   [ method ]\n   **\n   * Places an image on the surface\n   **\n   - src (string) URI of the source image\n   - x (number) x offset position\n   - y (number) y offset position\n   - width (number) width of the image\n   - height (number) height of the image\n   = (object) the `image` element\n   * or\n   = (object) Snap element object with type `image`\n   **\n   > Usage\n   | var c = paper.image(\"apple.png\", 10, 10, 80, 80);\n  \\*/\n\n\n  proto.image = function (src, x, y, width, height) {\n    var el = this.el(\"image\");\n\n    if (is(src, \"object\") && \"src\" in src) {\n      el.attr(src);\n    } else if (src != null) {\n      var set = {\n        \"xlink:href\": src,\n        preserveAspectRatio: \"none\"\n      };\n\n      if (x != null && y != null) {\n        set.x = x;\n        set.y = y;\n      }\n\n      if (width != null && height != null) {\n        set.width = width;\n        set.height = height;\n      } else {\n        preload(src, function () {\n          Snap._.$(el.node, {\n            width: this.offsetWidth,\n            height: this.offsetHeight\n          });\n        });\n      }\n\n      Snap._.$(el.node, set);\n    }\n\n    return el;\n  };\n  /*\\\n   * Paper.ellipse\n   [ method ]\n   **\n   * Draws an ellipse\n   **\n   - x (number) x coordinate of the centre\n   - y (number) y coordinate of the centre\n   - rx (number) horizontal radius\n   - ry (number) vertical radius\n   = (object) the `ellipse` element\n   **\n   > Usage\n   | var c = paper.ellipse(50, 50, 40, 20);\n  \\*/\n\n\n  proto.ellipse = function (cx, cy, rx, ry) {\n    var attr;\n\n    if (is(cx, \"object\") && cx == \"[object Object]\") {\n      attr = cx;\n    } else if (cx != null) {\n      attr = {\n        cx: cx,\n        cy: cy,\n        rx: rx,\n        ry: ry\n      };\n    }\n\n    return this.el(\"ellipse\", attr);\n  }; // SIERRA Paper.path(): Unclear from the link what a Catmull-Rom curveto is, and why it would make life any easier.\n\n  /*\\\n   * Paper.path\n   [ method ]\n   **\n   * Creates a `<path>` element using the given string as the path's definition\n   - pathString (string) #optional path string in SVG format\n   * Path string consists of one-letter commands, followed by comma seprarated arguments in numerical form. Example:\n   | \"M10,20L30,40\"\n   * This example features two commands: `M`, with arguments `(10, 20)` and `L` with arguments `(30, 40)`. Uppercase letter commands express coordinates in absolute terms, while lowercase commands express them in relative terms from the most recently declared coordinates.\n   *\n   # <p>Here is short list of commands available, for more details see <a href=\"http://www.w3.org/TR/SVG/paths.html#PathData\" title=\"Details of a path's data attribute's format are described in the SVG specification.\">SVG path string format</a> or <a href=\"https://developer.mozilla.org/en/SVG/Tutorial/Paths\">article about path strings at MDN</a>.</p>\n   # <table><thead><tr><th>Command</th><th>Name</th><th>Parameters</th></tr></thead><tbody>\n   # <tr><td>M</td><td>moveto</td><td>(x y)+</td></tr>\n   # <tr><td>Z</td><td>closepath</td><td>(none)</td></tr>\n   # <tr><td>L</td><td>lineto</td><td>(x y)+</td></tr>\n   # <tr><td>H</td><td>horizontal lineto</td><td>x+</td></tr>\n   # <tr><td>V</td><td>vertical lineto</td><td>y+</td></tr>\n   # <tr><td>C</td><td>curveto</td><td>(x1 y1 x2 y2 x y)+</td></tr>\n   # <tr><td>S</td><td>smooth curveto</td><td>(x2 y2 x y)+</td></tr>\n   # <tr><td>Q</td><td>quadratic Bézier curveto</td><td>(x1 y1 x y)+</td></tr>\n   # <tr><td>T</td><td>smooth quadratic Bézier curveto</td><td>(x y)+</td></tr>\n   # <tr><td>A</td><td>elliptical arc</td><td>(rx ry x-axis-rotation large-arc-flag sweep-flag x y)+</td></tr>\n   # <tr><td>R</td><td><a href=\"http://en.wikipedia.org/wiki/Catmull–Rom_spline#Catmull.E2.80.93Rom_spline\">Catmull-Rom curveto</a>*</td><td>x1 y1 (x y)+</td></tr></tbody></table>\n   * * _Catmull-Rom curveto_ is a not standard SVG command and added to make life easier.\n   * Note: there is a special case when a path consists of only three commands: `M10,10R…z`. In this case the path connects back to its starting point.\n   > Usage\n   | var c = paper.path(\"M10 10L90 90\");\n   | // draw a diagonal line:\n   | // move to 10,10, line to 90,90\n  \\*/\n\n\n  proto.path = function (d) {\n    var attr;\n\n    if (is(d, \"object\") && !is(d, \"array\")) {\n      attr = d;\n    } else if (d) {\n      attr = {\n        d: d\n      };\n    }\n\n    return this.el(\"path\", attr);\n  };\n  /*\\\n   * Paper.g\n   [ method ]\n   **\n   * Creates a group element\n   **\n   - varargs (…) #optional elements to nest within the group\n   = (object) the `g` element\n   **\n   > Usage\n   | var c1 = paper.circle(),\n   |     c2 = paper.rect(),\n   |     g = paper.g(c2, c1); // note that the order of elements is different\n   * or\n   | var c1 = paper.circle(),\n   |     c2 = paper.rect(),\n   |     g = paper.g();\n   | g.add(c2, c1);\n  \\*/\n\n  /*\\\n   * Paper.group\n   [ method ]\n   **\n   * See @Paper.g\n  \\*/\n\n\n  proto.group = proto.g = function (first) {\n    var attr,\n        el = this.el(\"g\");\n\n    if (arguments.length == 1 && first && !first.type) {\n      el.attr(first);\n    } else if (arguments.length) {\n      el.add(Array.prototype.slice.call(arguments, 0));\n    }\n\n    return el;\n  };\n  /*\\\n   * Paper.svg\n   [ method ]\n   **\n   * Creates a nested SVG element.\n   - x (number) @optional X of the element\n   - y (number) @optional Y of the element\n   - width (number) @optional width of the element\n   - height (number) @optional height of the element\n   - vbx (number) @optional viewbox X\n   - vby (number) @optional viewbox Y\n   - vbw (number) @optional viewbox width\n   - vbh (number) @optional viewbox height\n   **\n   = (object) the `svg` element\n   **\n  \\*/\n\n\n  proto.svg = function (x, y, width, height, vbx, vby, vbw, vbh) {\n    var attrs = {};\n\n    if (is(x, \"object\") && y == null) {\n      attrs = x;\n    } else {\n      if (x != null) {\n        attrs.x = x;\n      }\n\n      if (y != null) {\n        attrs.y = y;\n      }\n\n      if (width != null) {\n        attrs.width = width;\n      }\n\n      if (height != null) {\n        attrs.height = height;\n      }\n\n      if (vbx != null && vby != null && vbw != null && vbh != null) {\n        attrs.viewBox = [vbx, vby, vbw, vbh];\n      }\n    }\n\n    return this.el(\"svg\", attrs);\n  };\n  /*\\\n   * Paper.mask\n   [ method ]\n   **\n   * Equivalent in behaviour to @Paper.g, except it’s a mask.\n   **\n   = (object) the `mask` element\n   **\n  \\*/\n\n\n  proto.mask = function (first) {\n    var attr,\n        el = this.el(\"mask\");\n\n    if (arguments.length == 1 && first && !first.type) {\n      el.attr(first);\n    } else if (arguments.length) {\n      el.add(Array.prototype.slice.call(arguments, 0));\n    }\n\n    return el;\n  };\n  /*\\\n   * Paper.ptrn\n   [ method ]\n   **\n   * Equivalent in behaviour to @Paper.g, except it’s a pattern.\n   - x (number) @optional X of the element\n   - y (number) @optional Y of the element\n   - width (number) @optional width of the element\n   - height (number) @optional height of the element\n   - vbx (number) @optional viewbox X\n   - vby (number) @optional viewbox Y\n   - vbw (number) @optional viewbox width\n   - vbh (number) @optional viewbox height\n   **\n   = (object) the `pattern` element\n   **\n  \\*/\n\n\n  proto.ptrn = function (x, y, width, height, vx, vy, vw, vh) {\n    if (is(x, \"object\")) {\n      var attr = x;\n    } else {\n      attr = {\n        patternUnits: \"userSpaceOnUse\"\n      };\n\n      if (x) {\n        attr.x = x;\n      }\n\n      if (y) {\n        attr.y = y;\n      }\n\n      if (width != null) {\n        attr.width = width;\n      }\n\n      if (height != null) {\n        attr.height = height;\n      }\n\n      if (vx != null && vy != null && vw != null && vh != null) {\n        attr.viewBox = [vx, vy, vw, vh];\n      } else {\n        attr.viewBox = [x || 0, y || 0, width || 0, height || 0];\n      }\n    }\n\n    return this.el(\"pattern\", attr);\n  };\n  /*\\\n   * Paper.use\n   [ method ]\n   **\n   * Creates a <use> element.\n   - id (string) @optional id of element to link\n   * or\n   - id (Element) @optional element to link\n   **\n   = (object) the `use` element\n   **\n  \\*/\n\n\n  proto.use = function (id) {\n    if (id != null) {\n      if (id instanceof Element) {\n        if (!id.attr(\"id\")) {\n          id.attr({\n            id: Snap._.id(id)\n          });\n        }\n\n        id = id.attr(\"id\");\n      }\n\n      if (String(id).charAt() == \"#\") {\n        id = id.substring(1);\n      }\n\n      return this.el(\"use\", {\n        \"xlink:href\": \"#\" + id\n      });\n    } else {\n      return Element.prototype.use.call(this);\n    }\n  };\n  /*\\\n   * Paper.symbol\n   [ method ]\n   **\n   * Creates a <symbol> element.\n   - vbx (number) @optional viewbox X\n   - vby (number) @optional viewbox Y\n   - vbw (number) @optional viewbox width\n   - vbh (number) @optional viewbox height\n   = (object) the `symbol` element\n   **\n  \\*/\n\n\n  proto.symbol = function (vx, vy, vw, vh) {\n    var attr = {};\n\n    if (vx != null && vy != null && vw != null && vh != null) {\n      attr.viewBox = [vx, vy, vw, vh];\n    }\n\n    return this.el(\"symbol\", attr);\n  };\n  /*\\\n   * Paper.text\n   [ method ]\n   **\n   * Draws a text string\n   **\n   - x (number) x coordinate position\n   - y (number) y coordinate position\n   - text (string|array) The text string to draw or array of strings to nest within separate `<tspan>` elements\n   = (object) the `text` element\n   **\n   > Usage\n   | var t1 = paper.text(50, 50, \"Snap\");\n   | var t2 = paper.text(50, 50, [\"S\",\"n\",\"a\",\"p\"]);\n   | // Text path usage\n   | t1.attr({textpath: \"M10,10L100,100\"});\n   | // or\n   | var pth = paper.path(\"M10,10L100,100\");\n   | t1.attr({textpath: pth});\n  \\*/\n\n\n  proto.text = function (x, y, text) {\n    var attr = {};\n\n    if (is(x, \"object\")) {\n      attr = x;\n    } else if (x != null) {\n      attr = {\n        x: x,\n        y: y,\n        text: text || \"\"\n      };\n    }\n\n    return this.el(\"text\", attr);\n  };\n  /*\\\n   * Paper.line\n   [ method ]\n   **\n   * Draws a line\n   **\n   - x1 (number) x coordinate position of the start\n   - y1 (number) y coordinate position of the start\n   - x2 (number) x coordinate position of the end\n   - y2 (number) y coordinate position of the end\n   = (object) the `line` element\n   **\n   > Usage\n   | var t1 = paper.line(50, 50, 100, 100);\n  \\*/\n\n\n  proto.line = function (x1, y1, x2, y2) {\n    var attr = {};\n\n    if (is(x1, \"object\")) {\n      attr = x1;\n    } else if (x1 != null) {\n      attr = {\n        x1: x1,\n        x2: x2,\n        y1: y1,\n        y2: y2\n      };\n    }\n\n    return this.el(\"line\", attr);\n  };\n  /*\\\n   * Paper.polyline\n   [ method ]\n   **\n   * Draws a polyline\n   **\n   - points (array) array of points\n   * or\n   - varargs (…) points\n   = (object) the `polyline` element\n   **\n   > Usage\n   | var p1 = paper.polyline([10, 10, 100, 100]);\n   | var p2 = paper.polyline(10, 10, 100, 100);\n  \\*/\n\n\n  proto.polyline = function (points) {\n    if (arguments.length > 1) {\n      points = Array.prototype.slice.call(arguments, 0);\n    }\n\n    var attr = {};\n\n    if (is(points, \"object\") && !is(points, \"array\")) {\n      attr = points;\n    } else if (points != null) {\n      attr = {\n        points: points\n      };\n    }\n\n    return this.el(\"polyline\", attr);\n  };\n  /*\\\n   * Paper.polygon\n   [ method ]\n   **\n   * Draws a polygon. See @Paper.polyline\n  \\*/\n\n\n  proto.polygon = function (points) {\n    if (arguments.length > 1) {\n      points = Array.prototype.slice.call(arguments, 0);\n    }\n\n    var attr = {};\n\n    if (is(points, \"object\") && !is(points, \"array\")) {\n      attr = points;\n    } else if (points != null) {\n      attr = {\n        points: points\n      };\n    }\n\n    return this.el(\"polygon\", attr);\n  }; // gradients\n\n\n  (function () {\n    var $ = Snap._.$; // gradients' helpers\n\n    /*\\\n     * Element.stops\n     [ method ]\n     **\n     * Only for gradients!\n     * Returns array of gradient stops elements.\n     = (array) the stops array.\n    \\*/\n\n    function Gstops() {\n      return this.selectAll(\"stop\");\n    }\n    /*\\\n     * Element.addStop\n     [ method ]\n     **\n     * Only for gradients!\n     * Adds another stop to the gradient.\n     - color (string) stops color\n     - offset (number) stops offset 0..100\n     = (object) gradient element\n    \\*/\n\n\n    function GaddStop(color, offset) {\n      var stop = $(\"stop\"),\n          attr = {\n        offset: +offset + \"%\"\n      };\n      color = Snap.color(color);\n      attr[\"stop-color\"] = color.hex;\n\n      if (color.opacity < 1) {\n        attr[\"stop-opacity\"] = color.opacity;\n      }\n\n      $(stop, attr);\n      var stops = this.stops(),\n          inserted;\n\n      for (var i = 0; i < stops.length; i++) {\n        var stopOffset = parseFloat(stops[i].attr(\"offset\"));\n\n        if (stopOffset > offset) {\n          this.node.insertBefore(stop, stops[i].node);\n          inserted = true;\n          break;\n        }\n      }\n\n      if (!inserted) {\n        this.node.appendChild(stop);\n      }\n\n      return this;\n    }\n\n    function GgetBBox() {\n      if (this.type == \"linearGradient\") {\n        var x1 = $(this.node, \"x1\") || 0,\n            x2 = $(this.node, \"x2\") || 1,\n            y1 = $(this.node, \"y1\") || 0,\n            y2 = $(this.node, \"y2\") || 0;\n        return Snap._.box(x1, y1, math.abs(x2 - x1), math.abs(y2 - y1));\n      } else {\n        var cx = this.node.cx || .5,\n            cy = this.node.cy || .5,\n            r = this.node.r || 0;\n        return Snap._.box(cx - r, cy - r, r * 2, r * 2);\n      }\n    }\n    /*\\\n     * Element.setStops\n     [ method ]\n     **\n     * Only for gradients!\n     * Updates stops of the gradient based on passed gradient descriptor. See @Ppaer.gradient\n     - str (string) gradient descriptor part after `()`.\n     = (object) gradient element\n     | var g = paper.gradient(\"l(0, 0, 1, 1)#000-#f00-#fff\");\n     | g.setStops(\"#fff-#000-#f00-#fc0\");\n    \\*/\n\n\n    function GsetStops(str) {\n      var grad = str,\n          stops = this.stops();\n\n      if (typeof str == \"string\") {\n        grad = eve(\"snap.util.grad.parse\", null, \"l(0,0,0,1)\" + str).firstDefined().stops;\n      }\n\n      if (!Snap.is(grad, \"array\")) {\n        return;\n      }\n\n      for (var i = 0; i < stops.length; i++) {\n        if (grad[i]) {\n          var color = Snap.color(grad[i].color),\n              attr = {\n            \"offset\": grad[i].offset + \"%\"\n          };\n          attr[\"stop-color\"] = color.hex;\n\n          if (color.opacity < 1) {\n            attr[\"stop-opacity\"] = color.opacity;\n          }\n\n          stops[i].attr(attr);\n        } else {\n          stops[i].remove();\n        }\n      }\n\n      for (i = stops.length; i < grad.length; i++) {\n        this.addStop(grad[i].color, grad[i].offset);\n      }\n\n      return this;\n    }\n\n    function gradient(defs, str) {\n      var grad = eve(\"snap.util.grad.parse\", null, str).firstDefined(),\n          el;\n\n      if (!grad) {\n        return null;\n      }\n\n      grad.params.unshift(defs);\n\n      if (grad.type.toLowerCase() == \"l\") {\n        el = gradientLinear.apply(0, grad.params);\n      } else {\n        el = gradientRadial.apply(0, grad.params);\n      }\n\n      if (grad.type != grad.type.toLowerCase()) {\n        $(el.node, {\n          gradientUnits: \"userSpaceOnUse\"\n        });\n      }\n\n      var stops = grad.stops,\n          len = stops.length;\n\n      for (var i = 0; i < len; i++) {\n        var stop = stops[i];\n        el.addStop(stop.color, stop.offset);\n      }\n\n      return el;\n    }\n\n    function gradientLinear(defs, x1, y1, x2, y2) {\n      var el = Snap._.make(\"linearGradient\", defs);\n\n      el.stops = Gstops;\n      el.addStop = GaddStop;\n      el.getBBox = GgetBBox;\n      el.setStops = GsetStops;\n\n      if (x1 != null) {\n        $(el.node, {\n          x1: x1,\n          y1: y1,\n          x2: x2,\n          y2: y2\n        });\n      }\n\n      return el;\n    }\n\n    function gradientRadial(defs, cx, cy, r, fx, fy) {\n      var el = Snap._.make(\"radialGradient\", defs);\n\n      el.stops = Gstops;\n      el.addStop = GaddStop;\n      el.getBBox = GgetBBox;\n\n      if (cx != null) {\n        $(el.node, {\n          cx: cx,\n          cy: cy,\n          r: r\n        });\n      }\n\n      if (fx != null && fy != null) {\n        $(el.node, {\n          fx: fx,\n          fy: fy\n        });\n      }\n\n      return el;\n    }\n    /*\\\n     * Paper.gradient\n     [ method ]\n     **\n     * Creates a gradient element\n     **\n     - gradient (string) gradient descriptor\n     > Gradient Descriptor\n     * The gradient descriptor is an expression formatted as\n     * follows: `<type>(<coords>)<colors>`.  The `<type>` can be\n     * either linear or radial.  The uppercase `L` or `R` letters\n     * indicate absolute coordinates offset from the SVG surface.\n     * Lowercase `l` or `r` letters indicate coordinates\n     * calculated relative to the element to which the gradient is\n     * applied.  Coordinates specify a linear gradient vector as\n     * `x1`, `y1`, `x2`, `y2`, or a radial gradient as `cx`, `cy`,\n     * `r` and optional `fx`, `fy` specifying a focal point away\n     * from the center of the circle. Specify `<colors>` as a list\n     * of dash-separated CSS color values.  Each color may be\n     * followed by a custom offset value, separated with a colon\n     * character.\n     > Examples\n     * Linear gradient, relative from top-left corner to bottom-right\n     * corner, from black through red to white:\n     | var g = paper.gradient(\"l(0, 0, 1, 1)#000-#f00-#fff\");\n     * Linear gradient, absolute from (0, 0) to (100, 100), from black\n     * through red at 25% to white:\n     | var g = paper.gradient(\"L(0, 0, 100, 100)#000-#f00:25-#fff\");\n     * Radial gradient, relative from the center of the element with radius\n     * half the width, from black to white:\n     | var g = paper.gradient(\"r(0.5, 0.5, 0.5)#000-#fff\");\n     * To apply the gradient:\n     | paper.circle(50, 50, 40).attr({\n     |     fill: g\n     | });\n     = (object) the `gradient` element\n    \\*/\n\n\n    proto.gradient = function (str) {\n      return gradient(this.defs, str);\n    };\n\n    proto.gradientLinear = function (x1, y1, x2, y2) {\n      return gradientLinear(this.defs, x1, y1, x2, y2);\n    };\n\n    proto.gradientRadial = function (cx, cy, r, fx, fy) {\n      return gradientRadial(this.defs, cx, cy, r, fx, fy);\n    };\n    /*\\\n     * Paper.toString\n     [ method ]\n     **\n     * Returns SVG code for the @Paper\n     = (string) SVG code for the @Paper\n    \\*/\n\n\n    proto.toString = function () {\n      var doc = this.node.ownerDocument,\n          f = doc.createDocumentFragment(),\n          d = doc.createElement(\"div\"),\n          svg = this.node.cloneNode(true),\n          res;\n      f.appendChild(d);\n      d.appendChild(svg);\n\n      Snap._.$(svg, {\n        xmlns: \"http://www.w3.org/2000/svg\"\n      });\n\n      res = d.innerHTML;\n      f.removeChild(f.firstChild);\n      return res;\n    };\n    /*\\\n     * Paper.toDataURL\n     [ method ]\n     **\n     * Returns SVG code for the @Paper as Data URI string.\n     = (string) Data URI string\n    \\*/\n\n\n    proto.toDataURL = function () {\n      if (window && window.btoa) {\n        return \"data:image/svg+xml;base64,\" + btoa(unescape(encodeURIComponent(this)));\n      }\n    };\n    /*\\\n     * Paper.clear\n     [ method ]\n     **\n     * Removes all child nodes of the paper, except <defs>.\n    \\*/\n\n\n    proto.clear = function () {\n      var node = this.node.firstChild,\n          next;\n\n      while (node) {\n        next = node.nextSibling;\n\n        if (node.tagName != \"defs\") {\n          node.parentNode.removeChild(node);\n        } else {\n          proto.clear.call({\n            node: node\n          });\n        }\n\n        node = next;\n      }\n    };\n  })();\n}); // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nSnap.plugin(function (Snap, Element, Paper, glob) {\n  var elproto = Element.prototype,\n      is = Snap.is,\n      clone = Snap._.clone,\n      has = \"hasOwnProperty\",\n      p2s = /,?([a-z]),?/gi,\n      toFloat = parseFloat,\n      math = Math,\n      PI = math.PI,\n      mmin = math.min,\n      mmax = math.max,\n      pow = math.pow,\n      abs = math.abs;\n\n  function paths(ps) {\n    var p = paths.ps = paths.ps || {};\n\n    if (p[ps]) {\n      p[ps].sleep = 100;\n    } else {\n      p[ps] = {\n        sleep: 100\n      };\n    }\n\n    setTimeout(function () {\n      for (var key in p) {\n        if (p[has](key) && key != ps) {\n          p[key].sleep--;\n          !p[key].sleep && delete p[key];\n        }\n      }\n    });\n    return p[ps];\n  }\n\n  function box(x, y, width, height) {\n    if (x == null) {\n      x = y = width = height = 0;\n    }\n\n    if (y == null) {\n      y = x.y;\n      width = x.width;\n      height = x.height;\n      x = x.x;\n    }\n\n    return {\n      x: x,\n      y: y,\n      width: width,\n      w: width,\n      height: height,\n      h: height,\n      x2: x + width,\n      y2: y + height,\n      cx: x + width / 2,\n      cy: y + height / 2,\n      r1: math.min(width, height) / 2,\n      r2: math.max(width, height) / 2,\n      r0: math.sqrt(width * width + height * height) / 2,\n      path: rectPath(x, y, width, height),\n      vb: [x, y, width, height].join(\" \")\n    };\n  }\n\n  function toString() {\n    return this.join(\",\").replace(p2s, \"$1\");\n  }\n\n  function pathClone(pathArray) {\n    var res = clone(pathArray);\n    res.toString = toString;\n    return res;\n  }\n\n  function getPointAtSegmentLength(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, length) {\n    if (length == null) {\n      return bezlen(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y);\n    } else {\n      return findDotsAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, getTotLen(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, length));\n    }\n  }\n\n  function getLengthFactory(istotal, subpath) {\n    function O(val) {\n      return +(+val).toFixed(3);\n    }\n\n    return Snap._.cacher(function (path, length, onlystart) {\n      if (path instanceof Element) {\n        path = path.attr(\"d\");\n      }\n\n      path = path2curve(path);\n      var x,\n          y,\n          p,\n          l,\n          sp = \"\",\n          subpaths = {},\n          point,\n          len = 0;\n\n      for (var i = 0, ii = path.length; i < ii; i++) {\n        p = path[i];\n\n        if (p[0] == \"M\") {\n          x = +p[1];\n          y = +p[2];\n        } else {\n          l = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6]);\n\n          if (len + l > length) {\n            if (subpath && !subpaths.start) {\n              point = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6], length - len);\n              sp += [\"C\" + O(point.start.x), O(point.start.y), O(point.m.x), O(point.m.y), O(point.x), O(point.y)];\n\n              if (onlystart) {\n                return sp;\n              }\n\n              subpaths.start = sp;\n              sp = [\"M\" + O(point.x), O(point.y) + \"C\" + O(point.n.x), O(point.n.y), O(point.end.x), O(point.end.y), O(p[5]), O(p[6])].join();\n              len += l;\n              x = +p[5];\n              y = +p[6];\n              continue;\n            }\n\n            if (!istotal && !subpath) {\n              point = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6], length - len);\n              return point;\n            }\n          }\n\n          len += l;\n          x = +p[5];\n          y = +p[6];\n        }\n\n        sp += p.shift() + p;\n      }\n\n      subpaths.end = sp;\n      point = istotal ? len : subpath ? subpaths : findDotsAtSegment(x, y, p[0], p[1], p[2], p[3], p[4], p[5], 1);\n      return point;\n    }, null, Snap._.clone);\n  }\n\n  var getTotalLength = getLengthFactory(1),\n      getPointAtLength = getLengthFactory(),\n      getSubpathsAtLength = getLengthFactory(0, 1);\n\n  function findDotsAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, t) {\n    var t1 = 1 - t,\n        t13 = pow(t1, 3),\n        t12 = pow(t1, 2),\n        t2 = t * t,\n        t3 = t2 * t,\n        x = t13 * p1x + t12 * 3 * t * c1x + t1 * 3 * t * t * c2x + t3 * p2x,\n        y = t13 * p1y + t12 * 3 * t * c1y + t1 * 3 * t * t * c2y + t3 * p2y,\n        mx = p1x + 2 * t * (c1x - p1x) + t2 * (c2x - 2 * c1x + p1x),\n        my = p1y + 2 * t * (c1y - p1y) + t2 * (c2y - 2 * c1y + p1y),\n        nx = c1x + 2 * t * (c2x - c1x) + t2 * (p2x - 2 * c2x + c1x),\n        ny = c1y + 2 * t * (c2y - c1y) + t2 * (p2y - 2 * c2y + c1y),\n        ax = t1 * p1x + t * c1x,\n        ay = t1 * p1y + t * c1y,\n        cx = t1 * c2x + t * p2x,\n        cy = t1 * c2y + t * p2y,\n        alpha = 90 - math.atan2(mx - nx, my - ny) * 180 / PI; // (mx > nx || my < ny) && (alpha += 180);\n\n    return {\n      x: x,\n      y: y,\n      m: {\n        x: mx,\n        y: my\n      },\n      n: {\n        x: nx,\n        y: ny\n      },\n      start: {\n        x: ax,\n        y: ay\n      },\n      end: {\n        x: cx,\n        y: cy\n      },\n      alpha: alpha\n    };\n  }\n\n  function bezierBBox(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y) {\n    if (!Snap.is(p1x, \"array\")) {\n      p1x = [p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y];\n    }\n\n    var bbox = curveDim.apply(null, p1x);\n    return box(bbox.min.x, bbox.min.y, bbox.max.x - bbox.min.x, bbox.max.y - bbox.min.y);\n  }\n\n  function isPointInsideBBox(bbox, x, y) {\n    return x >= bbox.x && x <= bbox.x + bbox.width && y >= bbox.y && y <= bbox.y + bbox.height;\n  }\n\n  function isBBoxIntersect(bbox1, bbox2) {\n    bbox1 = box(bbox1);\n    bbox2 = box(bbox2);\n    return isPointInsideBBox(bbox2, bbox1.x, bbox1.y) || isPointInsideBBox(bbox2, bbox1.x2, bbox1.y) || isPointInsideBBox(bbox2, bbox1.x, bbox1.y2) || isPointInsideBBox(bbox2, bbox1.x2, bbox1.y2) || isPointInsideBBox(bbox1, bbox2.x, bbox2.y) || isPointInsideBBox(bbox1, bbox2.x2, bbox2.y) || isPointInsideBBox(bbox1, bbox2.x, bbox2.y2) || isPointInsideBBox(bbox1, bbox2.x2, bbox2.y2) || (bbox1.x < bbox2.x2 && bbox1.x > bbox2.x || bbox2.x < bbox1.x2 && bbox2.x > bbox1.x) && (bbox1.y < bbox2.y2 && bbox1.y > bbox2.y || bbox2.y < bbox1.y2 && bbox2.y > bbox1.y);\n  }\n\n  function base3(t, p1, p2, p3, p4) {\n    var t1 = -3 * p1 + 9 * p2 - 9 * p3 + 3 * p4,\n        t2 = t * t1 + 6 * p1 - 12 * p2 + 6 * p3;\n    return t * t2 - 3 * p1 + 3 * p2;\n  }\n\n  function bezlen(x1, y1, x2, y2, x3, y3, x4, y4, z) {\n    if (z == null) {\n      z = 1;\n    }\n\n    z = z > 1 ? 1 : z < 0 ? 0 : z;\n    var z2 = z / 2,\n        n = 12,\n        Tvalues = [-.1252, .1252, -.3678, .3678, -.5873, .5873, -.7699, .7699, -.9041, .9041, -.9816, .9816],\n        Cvalues = [0.2491, 0.2491, 0.2335, 0.2335, 0.2032, 0.2032, 0.1601, 0.1601, 0.1069, 0.1069, 0.0472, 0.0472],\n        sum = 0;\n\n    for (var i = 0; i < n; i++) {\n      var ct = z2 * Tvalues[i] + z2,\n          xbase = base3(ct, x1, x2, x3, x4),\n          ybase = base3(ct, y1, y2, y3, y4),\n          comb = xbase * xbase + ybase * ybase;\n      sum += Cvalues[i] * math.sqrt(comb);\n    }\n\n    return z2 * sum;\n  }\n\n  function getTotLen(x1, y1, x2, y2, x3, y3, x4, y4, ll) {\n    if (ll < 0 || bezlen(x1, y1, x2, y2, x3, y3, x4, y4) < ll) {\n      return;\n    }\n\n    var t = 1,\n        step = t / 2,\n        t2 = t - step,\n        l,\n        e = .01;\n    l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);\n\n    while (abs(l - ll) > e) {\n      step /= 2;\n      t2 += (l < ll ? 1 : -1) * step;\n      l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);\n    }\n\n    return t2;\n  }\n\n  function intersect(x1, y1, x2, y2, x3, y3, x4, y4) {\n    if (mmax(x1, x2) < mmin(x3, x4) || mmin(x1, x2) > mmax(x3, x4) || mmax(y1, y2) < mmin(y3, y4) || mmin(y1, y2) > mmax(y3, y4)) {\n      return;\n    }\n\n    var nx = (x1 * y2 - y1 * x2) * (x3 - x4) - (x1 - x2) * (x3 * y4 - y3 * x4),\n        ny = (x1 * y2 - y1 * x2) * (y3 - y4) - (y1 - y2) * (x3 * y4 - y3 * x4),\n        denominator = (x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4);\n\n    if (!denominator) {\n      return;\n    }\n\n    var px = nx / denominator,\n        py = ny / denominator,\n        px2 = +px.toFixed(2),\n        py2 = +py.toFixed(2);\n\n    if (px2 < +mmin(x1, x2).toFixed(2) || px2 > +mmax(x1, x2).toFixed(2) || px2 < +mmin(x3, x4).toFixed(2) || px2 > +mmax(x3, x4).toFixed(2) || py2 < +mmin(y1, y2).toFixed(2) || py2 > +mmax(y1, y2).toFixed(2) || py2 < +mmin(y3, y4).toFixed(2) || py2 > +mmax(y3, y4).toFixed(2)) {\n      return;\n    }\n\n    return {\n      x: px,\n      y: py\n    };\n  }\n\n  function inter(bez1, bez2) {\n    return interHelper(bez1, bez2);\n  }\n\n  function interCount(bez1, bez2) {\n    return interHelper(bez1, bez2, 1);\n  }\n\n  function interHelper(bez1, bez2, justCount) {\n    var bbox1 = bezierBBox(bez1),\n        bbox2 = bezierBBox(bez2);\n\n    if (!isBBoxIntersect(bbox1, bbox2)) {\n      return justCount ? 0 : [];\n    }\n\n    var l1 = bezlen.apply(0, bez1),\n        l2 = bezlen.apply(0, bez2),\n        n1 = ~~(l1 / 8),\n        n2 = ~~(l2 / 8),\n        dots1 = [],\n        dots2 = [],\n        xy = {},\n        res = justCount ? 0 : [];\n\n    for (var i = 0; i < n1 + 1; i++) {\n      var p = findDotsAtSegment.apply(0, bez1.concat(i / n1));\n      dots1.push({\n        x: p.x,\n        y: p.y,\n        t: i / n1\n      });\n    }\n\n    for (i = 0; i < n2 + 1; i++) {\n      p = findDotsAtSegment.apply(0, bez2.concat(i / n2));\n      dots2.push({\n        x: p.x,\n        y: p.y,\n        t: i / n2\n      });\n    }\n\n    for (i = 0; i < n1; i++) {\n      for (var j = 0; j < n2; j++) {\n        var di = dots1[i],\n            di1 = dots1[i + 1],\n            dj = dots2[j],\n            dj1 = dots2[j + 1],\n            ci = abs(di1.x - di.x) < .001 ? \"y\" : \"x\",\n            cj = abs(dj1.x - dj.x) < .001 ? \"y\" : \"x\",\n            is = intersect(di.x, di.y, di1.x, di1.y, dj.x, dj.y, dj1.x, dj1.y);\n\n        if (is) {\n          if (xy[is.x.toFixed(4)] == is.y.toFixed(4)) {\n            continue;\n          }\n\n          xy[is.x.toFixed(4)] = is.y.toFixed(4);\n          var t1 = di.t + abs((is[ci] - di[ci]) / (di1[ci] - di[ci])) * (di1.t - di.t),\n              t2 = dj.t + abs((is[cj] - dj[cj]) / (dj1[cj] - dj[cj])) * (dj1.t - dj.t);\n\n          if (t1 >= 0 && t1 <= 1 && t2 >= 0 && t2 <= 1) {\n            if (justCount) {\n              res++;\n            } else {\n              res.push({\n                x: is.x,\n                y: is.y,\n                t1: t1,\n                t2: t2\n              });\n            }\n          }\n        }\n      }\n    }\n\n    return res;\n  }\n\n  function pathIntersection(path1, path2) {\n    return interPathHelper(path1, path2);\n  }\n\n  function pathIntersectionNumber(path1, path2) {\n    return interPathHelper(path1, path2, 1);\n  }\n\n  function interPathHelper(path1, path2, justCount) {\n    path1 = path2curve(path1);\n    path2 = path2curve(path2);\n    var x1,\n        y1,\n        x2,\n        y2,\n        x1m,\n        y1m,\n        x2m,\n        y2m,\n        bez1,\n        bez2,\n        res = justCount ? 0 : [];\n\n    for (var i = 0, ii = path1.length; i < ii; i++) {\n      var pi = path1[i];\n\n      if (pi[0] == \"M\") {\n        x1 = x1m = pi[1];\n        y1 = y1m = pi[2];\n      } else {\n        if (pi[0] == \"C\") {\n          bez1 = [x1, y1].concat(pi.slice(1));\n          x1 = bez1[6];\n          y1 = bez1[7];\n        } else {\n          bez1 = [x1, y1, x1, y1, x1m, y1m, x1m, y1m];\n          x1 = x1m;\n          y1 = y1m;\n        }\n\n        for (var j = 0, jj = path2.length; j < jj; j++) {\n          var pj = path2[j];\n\n          if (pj[0] == \"M\") {\n            x2 = x2m = pj[1];\n            y2 = y2m = pj[2];\n          } else {\n            if (pj[0] == \"C\") {\n              bez2 = [x2, y2].concat(pj.slice(1));\n              x2 = bez2[6];\n              y2 = bez2[7];\n            } else {\n              bez2 = [x2, y2, x2, y2, x2m, y2m, x2m, y2m];\n              x2 = x2m;\n              y2 = y2m;\n            }\n\n            var intr = interHelper(bez1, bez2, justCount);\n\n            if (justCount) {\n              res += intr;\n            } else {\n              for (var k = 0, kk = intr.length; k < kk; k++) {\n                intr[k].segment1 = i;\n                intr[k].segment2 = j;\n                intr[k].bez1 = bez1;\n                intr[k].bez2 = bez2;\n              }\n\n              res = res.concat(intr);\n            }\n          }\n        }\n      }\n    }\n\n    return res;\n  }\n\n  function isPointInsidePath(path, x, y) {\n    var bbox = pathBBox(path);\n    return isPointInsideBBox(bbox, x, y) && interPathHelper(path, [[\"M\", x, y], [\"H\", bbox.x2 + 10]], 1) % 2 == 1;\n  }\n\n  function pathBBox(path) {\n    var pth = paths(path);\n\n    if (pth.bbox) {\n      return clone(pth.bbox);\n    }\n\n    if (!path) {\n      return box();\n    }\n\n    path = path2curve(path);\n    var x = 0,\n        y = 0,\n        X = [],\n        Y = [],\n        p;\n\n    for (var i = 0, ii = path.length; i < ii; i++) {\n      p = path[i];\n\n      if (p[0] == \"M\") {\n        x = p[1];\n        y = p[2];\n        X.push(x);\n        Y.push(y);\n      } else {\n        var dim = curveDim(x, y, p[1], p[2], p[3], p[4], p[5], p[6]);\n        X = X.concat(dim.min.x, dim.max.x);\n        Y = Y.concat(dim.min.y, dim.max.y);\n        x = p[5];\n        y = p[6];\n      }\n    }\n\n    var xmin = mmin.apply(0, X),\n        ymin = mmin.apply(0, Y),\n        xmax = mmax.apply(0, X),\n        ymax = mmax.apply(0, Y),\n        bb = box(xmin, ymin, xmax - xmin, ymax - ymin);\n    pth.bbox = clone(bb);\n    return bb;\n  }\n\n  function rectPath(x, y, w, h, r) {\n    if (r) {\n      return [[\"M\", +x + +r, y], [\"l\", w - r * 2, 0], [\"a\", r, r, 0, 0, 1, r, r], [\"l\", 0, h - r * 2], [\"a\", r, r, 0, 0, 1, -r, r], [\"l\", r * 2 - w, 0], [\"a\", r, r, 0, 0, 1, -r, -r], [\"l\", 0, r * 2 - h], [\"a\", r, r, 0, 0, 1, r, -r], [\"z\"]];\n    }\n\n    var res = [[\"M\", x, y], [\"l\", w, 0], [\"l\", 0, h], [\"l\", -w, 0], [\"z\"]];\n    res.toString = toString;\n    return res;\n  }\n\n  function ellipsePath(x, y, rx, ry, a) {\n    if (a == null && ry == null) {\n      ry = rx;\n    }\n\n    x = +x;\n    y = +y;\n    rx = +rx;\n    ry = +ry;\n\n    if (a != null) {\n      var rad = Math.PI / 180,\n          x1 = x + rx * Math.cos(-ry * rad),\n          x2 = x + rx * Math.cos(-a * rad),\n          y1 = y + rx * Math.sin(-ry * rad),\n          y2 = y + rx * Math.sin(-a * rad),\n          res = [[\"M\", x1, y1], [\"A\", rx, rx, 0, +(a - ry > 180), 0, x2, y2]];\n    } else {\n      res = [[\"M\", x, y], [\"m\", 0, -ry], [\"a\", rx, ry, 0, 1, 1, 0, 2 * ry], [\"a\", rx, ry, 0, 1, 1, 0, -2 * ry], [\"z\"]];\n    }\n\n    res.toString = toString;\n    return res;\n  }\n\n  var unit2px = Snap._unit2px,\n      getPath = {\n    path: function path(el) {\n      return el.attr(\"path\");\n    },\n    circle: function circle(el) {\n      var attr = unit2px(el);\n      return ellipsePath(attr.cx, attr.cy, attr.r);\n    },\n    ellipse: function ellipse(el) {\n      var attr = unit2px(el);\n      return ellipsePath(attr.cx || 0, attr.cy || 0, attr.rx, attr.ry);\n    },\n    rect: function rect(el) {\n      var attr = unit2px(el);\n      return rectPath(attr.x || 0, attr.y || 0, attr.width, attr.height, attr.rx, attr.ry);\n    },\n    image: function image(el) {\n      var attr = unit2px(el);\n      return rectPath(attr.x || 0, attr.y || 0, attr.width, attr.height);\n    },\n    line: function line(el) {\n      return \"M\" + [el.attr(\"x1\") || 0, el.attr(\"y1\") || 0, el.attr(\"x2\"), el.attr(\"y2\")];\n    },\n    polyline: function polyline(el) {\n      return \"M\" + el.attr(\"points\");\n    },\n    polygon: function polygon(el) {\n      return \"M\" + el.attr(\"points\") + \"z\";\n    },\n    deflt: function deflt(el) {\n      var bbox = el.node.getBBox();\n      return rectPath(bbox.x, bbox.y, bbox.width, bbox.height);\n    }\n  };\n\n  function pathToRelative(pathArray) {\n    var pth = paths(pathArray),\n        lowerCase = String.prototype.toLowerCase;\n\n    if (pth.rel) {\n      return pathClone(pth.rel);\n    }\n\n    if (!Snap.is(pathArray, \"array\") || !Snap.is(pathArray && pathArray[0], \"array\")) {\n      pathArray = Snap.parsePathString(pathArray);\n    }\n\n    var res = [],\n        x = 0,\n        y = 0,\n        mx = 0,\n        my = 0,\n        start = 0;\n\n    if (pathArray[0][0] == \"M\") {\n      x = pathArray[0][1];\n      y = pathArray[0][2];\n      mx = x;\n      my = y;\n      start++;\n      res.push([\"M\", x, y]);\n    }\n\n    for (var i = start, ii = pathArray.length; i < ii; i++) {\n      var r = res[i] = [],\n          pa = pathArray[i];\n\n      if (pa[0] != lowerCase.call(pa[0])) {\n        r[0] = lowerCase.call(pa[0]);\n\n        switch (r[0]) {\n          case \"a\":\n            r[1] = pa[1];\n            r[2] = pa[2];\n            r[3] = pa[3];\n            r[4] = pa[4];\n            r[5] = pa[5];\n            r[6] = +(pa[6] - x).toFixed(3);\n            r[7] = +(pa[7] - y).toFixed(3);\n            break;\n\n          case \"v\":\n            r[1] = +(pa[1] - y).toFixed(3);\n            break;\n\n          case \"m\":\n            mx = pa[1];\n            my = pa[2];\n\n          default:\n            for (var j = 1, jj = pa.length; j < jj; j++) {\n              r[j] = +(pa[j] - (j % 2 ? x : y)).toFixed(3);\n            }\n\n        }\n      } else {\n        r = res[i] = [];\n\n        if (pa[0] == \"m\") {\n          mx = pa[1] + x;\n          my = pa[2] + y;\n        }\n\n        for (var k = 0, kk = pa.length; k < kk; k++) {\n          res[i][k] = pa[k];\n        }\n      }\n\n      var len = res[i].length;\n\n      switch (res[i][0]) {\n        case \"z\":\n          x = mx;\n          y = my;\n          break;\n\n        case \"h\":\n          x += +res[i][len - 1];\n          break;\n\n        case \"v\":\n          y += +res[i][len - 1];\n          break;\n\n        default:\n          x += +res[i][len - 2];\n          y += +res[i][len - 1];\n      }\n    }\n\n    res.toString = toString;\n    pth.rel = pathClone(res);\n    return res;\n  }\n\n  function pathToAbsolute(pathArray) {\n    var pth = paths(pathArray);\n\n    if (pth.abs) {\n      return pathClone(pth.abs);\n    }\n\n    if (!is(pathArray, \"array\") || !is(pathArray && pathArray[0], \"array\")) {\n      // rough assumption\n      pathArray = Snap.parsePathString(pathArray);\n    }\n\n    if (!pathArray || !pathArray.length) {\n      return [[\"M\", 0, 0]];\n    }\n\n    var res = [],\n        x = 0,\n        y = 0,\n        mx = 0,\n        my = 0,\n        start = 0,\n        pa0;\n\n    if (pathArray[0][0] == \"M\") {\n      x = +pathArray[0][1];\n      y = +pathArray[0][2];\n      mx = x;\n      my = y;\n      start++;\n      res[0] = [\"M\", x, y];\n    }\n\n    var crz = pathArray.length == 3 && pathArray[0][0] == \"M\" && pathArray[1][0].toUpperCase() == \"R\" && pathArray[2][0].toUpperCase() == \"Z\";\n\n    for (var r, pa, i = start, ii = pathArray.length; i < ii; i++) {\n      res.push(r = []);\n      pa = pathArray[i];\n      pa0 = pa[0];\n\n      if (pa0 != pa0.toUpperCase()) {\n        r[0] = pa0.toUpperCase();\n\n        switch (r[0]) {\n          case \"A\":\n            r[1] = pa[1];\n            r[2] = pa[2];\n            r[3] = pa[3];\n            r[4] = pa[4];\n            r[5] = pa[5];\n            r[6] = +pa[6] + x;\n            r[7] = +pa[7] + y;\n            break;\n\n          case \"V\":\n            r[1] = +pa[1] + y;\n            break;\n\n          case \"H\":\n            r[1] = +pa[1] + x;\n            break;\n\n          case \"R\":\n            var dots = [x, y].concat(pa.slice(1));\n\n            for (var j = 2, jj = dots.length; j < jj; j++) {\n              dots[j] = +dots[j] + x;\n              dots[++j] = +dots[j] + y;\n            }\n\n            res.pop();\n            res = res.concat(catmullRom2bezier(dots, crz));\n            break;\n\n          case \"O\":\n            res.pop();\n            dots = ellipsePath(x, y, pa[1], pa[2]);\n            dots.push(dots[0]);\n            res = res.concat(dots);\n            break;\n\n          case \"U\":\n            res.pop();\n            res = res.concat(ellipsePath(x, y, pa[1], pa[2], pa[3]));\n            r = [\"U\"].concat(res[res.length - 1].slice(-2));\n            break;\n\n          case \"M\":\n            mx = +pa[1] + x;\n            my = +pa[2] + y;\n\n          default:\n            for (j = 1, jj = pa.length; j < jj; j++) {\n              r[j] = +pa[j] + (j % 2 ? x : y);\n            }\n\n        }\n      } else if (pa0 == \"R\") {\n        dots = [x, y].concat(pa.slice(1));\n        res.pop();\n        res = res.concat(catmullRom2bezier(dots, crz));\n        r = [\"R\"].concat(pa.slice(-2));\n      } else if (pa0 == \"O\") {\n        res.pop();\n        dots = ellipsePath(x, y, pa[1], pa[2]);\n        dots.push(dots[0]);\n        res = res.concat(dots);\n      } else if (pa0 == \"U\") {\n        res.pop();\n        res = res.concat(ellipsePath(x, y, pa[1], pa[2], pa[3]));\n        r = [\"U\"].concat(res[res.length - 1].slice(-2));\n      } else {\n        for (var k = 0, kk = pa.length; k < kk; k++) {\n          r[k] = pa[k];\n        }\n      }\n\n      pa0 = pa0.toUpperCase();\n\n      if (pa0 != \"O\") {\n        switch (r[0]) {\n          case \"Z\":\n            x = +mx;\n            y = +my;\n            break;\n\n          case \"H\":\n            x = r[1];\n            break;\n\n          case \"V\":\n            y = r[1];\n            break;\n\n          case \"M\":\n            mx = r[r.length - 2];\n            my = r[r.length - 1];\n\n          default:\n            x = r[r.length - 2];\n            y = r[r.length - 1];\n        }\n      }\n    }\n\n    res.toString = toString;\n    pth.abs = pathClone(res);\n    return res;\n  }\n\n  function l2c(x1, y1, x2, y2) {\n    return [x1, y1, x2, y2, x2, y2];\n  }\n\n  function q2c(x1, y1, ax, ay, x2, y2) {\n    var _13 = 1 / 3,\n        _23 = 2 / 3;\n\n    return [_13 * x1 + _23 * ax, _13 * y1 + _23 * ay, _13 * x2 + _23 * ax, _13 * y2 + _23 * ay, x2, y2];\n  }\n\n  function a2c(x1, y1, rx, ry, angle, large_arc_flag, sweep_flag, x2, y2, recursive) {\n    // for more information of where this math came from visit:\n    // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes\n    var _120 = PI * 120 / 180,\n        rad = PI / 180 * (+angle || 0),\n        res = [],\n        xy,\n        rotate = Snap._.cacher(function (x, y, rad) {\n      var X = x * math.cos(rad) - y * math.sin(rad),\n          Y = x * math.sin(rad) + y * math.cos(rad);\n      return {\n        x: X,\n        y: Y\n      };\n    });\n\n    if (!rx || !ry) {\n      return [x1, y1, x2, y2, x2, y2];\n    }\n\n    if (!recursive) {\n      xy = rotate(x1, y1, -rad);\n      x1 = xy.x;\n      y1 = xy.y;\n      xy = rotate(x2, y2, -rad);\n      x2 = xy.x;\n      y2 = xy.y;\n      var cos = math.cos(PI / 180 * angle),\n          sin = math.sin(PI / 180 * angle),\n          x = (x1 - x2) / 2,\n          y = (y1 - y2) / 2;\n      var h = x * x / (rx * rx) + y * y / (ry * ry);\n\n      if (h > 1) {\n        h = math.sqrt(h);\n        rx = h * rx;\n        ry = h * ry;\n      }\n\n      var rx2 = rx * rx,\n          ry2 = ry * ry,\n          k = (large_arc_flag == sweep_flag ? -1 : 1) * math.sqrt(abs((rx2 * ry2 - rx2 * y * y - ry2 * x * x) / (rx2 * y * y + ry2 * x * x))),\n          cx = k * rx * y / ry + (x1 + x2) / 2,\n          cy = k * -ry * x / rx + (y1 + y2) / 2,\n          f1 = math.asin(((y1 - cy) / ry).toFixed(9)),\n          f2 = math.asin(((y2 - cy) / ry).toFixed(9));\n      f1 = x1 < cx ? PI - f1 : f1;\n      f2 = x2 < cx ? PI - f2 : f2;\n      f1 < 0 && (f1 = PI * 2 + f1);\n      f2 < 0 && (f2 = PI * 2 + f2);\n\n      if (sweep_flag && f1 > f2) {\n        f1 = f1 - PI * 2;\n      }\n\n      if (!sweep_flag && f2 > f1) {\n        f2 = f2 - PI * 2;\n      }\n    } else {\n      f1 = recursive[0];\n      f2 = recursive[1];\n      cx = recursive[2];\n      cy = recursive[3];\n    }\n\n    var df = f2 - f1;\n\n    if (abs(df) > _120) {\n      var f2old = f2,\n          x2old = x2,\n          y2old = y2;\n      f2 = f1 + _120 * (sweep_flag && f2 > f1 ? 1 : -1);\n      x2 = cx + rx * math.cos(f2);\n      y2 = cy + ry * math.sin(f2);\n      res = a2c(x2, y2, rx, ry, angle, 0, sweep_flag, x2old, y2old, [f2, f2old, cx, cy]);\n    }\n\n    df = f2 - f1;\n    var c1 = math.cos(f1),\n        s1 = math.sin(f1),\n        c2 = math.cos(f2),\n        s2 = math.sin(f2),\n        t = math.tan(df / 4),\n        hx = 4 / 3 * rx * t,\n        hy = 4 / 3 * ry * t,\n        m1 = [x1, y1],\n        m2 = [x1 + hx * s1, y1 - hy * c1],\n        m3 = [x2 + hx * s2, y2 - hy * c2],\n        m4 = [x2, y2];\n    m2[0] = 2 * m1[0] - m2[0];\n    m2[1] = 2 * m1[1] - m2[1];\n\n    if (recursive) {\n      return [m2, m3, m4].concat(res);\n    } else {\n      res = [m2, m3, m4].concat(res).join().split(\",\");\n      var newres = [];\n\n      for (var i = 0, ii = res.length; i < ii; i++) {\n        newres[i] = i % 2 ? rotate(res[i - 1], res[i], rad).y : rotate(res[i], res[i + 1], rad).x;\n      }\n\n      return newres;\n    }\n  }\n\n  function findDotAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, t) {\n    var t1 = 1 - t;\n    return {\n      x: pow(t1, 3) * p1x + pow(t1, 2) * 3 * t * c1x + t1 * 3 * t * t * c2x + pow(t, 3) * p2x,\n      y: pow(t1, 3) * p1y + pow(t1, 2) * 3 * t * c1y + t1 * 3 * t * t * c2y + pow(t, 3) * p2y\n    };\n  } // Returns bounding box of cubic bezier curve.\n  // Source: http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html\n  // Original version: NISHIO Hirokazu\n  // Modifications: https://github.com/timo22345\n\n\n  function curveDim(x0, y0, x1, y1, x2, y2, x3, y3) {\n    var tvalues = [],\n        bounds = [[], []],\n        a,\n        b,\n        c,\n        t,\n        t1,\n        t2,\n        b2ac,\n        sqrtb2ac;\n\n    for (var i = 0; i < 2; ++i) {\n      if (i == 0) {\n        b = 6 * x0 - 12 * x1 + 6 * x2;\n        a = -3 * x0 + 9 * x1 - 9 * x2 + 3 * x3;\n        c = 3 * x1 - 3 * x0;\n      } else {\n        b = 6 * y0 - 12 * y1 + 6 * y2;\n        a = -3 * y0 + 9 * y1 - 9 * y2 + 3 * y3;\n        c = 3 * y1 - 3 * y0;\n      }\n\n      if (abs(a) < 1e-12) {\n        if (abs(b) < 1e-12) {\n          continue;\n        }\n\n        t = -c / b;\n\n        if (0 < t && t < 1) {\n          tvalues.push(t);\n        }\n\n        continue;\n      }\n\n      b2ac = b * b - 4 * c * a;\n      sqrtb2ac = math.sqrt(b2ac);\n\n      if (b2ac < 0) {\n        continue;\n      }\n\n      t1 = (-b + sqrtb2ac) / (2 * a);\n\n      if (0 < t1 && t1 < 1) {\n        tvalues.push(t1);\n      }\n\n      t2 = (-b - sqrtb2ac) / (2 * a);\n\n      if (0 < t2 && t2 < 1) {\n        tvalues.push(t2);\n      }\n    }\n\n    var x,\n        y,\n        j = tvalues.length,\n        jlen = j,\n        mt;\n\n    while (j--) {\n      t = tvalues[j];\n      mt = 1 - t;\n      bounds[0][j] = mt * mt * mt * x0 + 3 * mt * mt * t * x1 + 3 * mt * t * t * x2 + t * t * t * x3;\n      bounds[1][j] = mt * mt * mt * y0 + 3 * mt * mt * t * y1 + 3 * mt * t * t * y2 + t * t * t * y3;\n    }\n\n    bounds[0][jlen] = x0;\n    bounds[1][jlen] = y0;\n    bounds[0][jlen + 1] = x3;\n    bounds[1][jlen + 1] = y3;\n    bounds[0].length = bounds[1].length = jlen + 2;\n    return {\n      min: {\n        x: mmin.apply(0, bounds[0]),\n        y: mmin.apply(0, bounds[1])\n      },\n      max: {\n        x: mmax.apply(0, bounds[0]),\n        y: mmax.apply(0, bounds[1])\n      }\n    };\n  }\n\n  function path2curve(path, path2) {\n    var pth = !path2 && paths(path);\n\n    if (!path2 && pth.curve) {\n      return pathClone(pth.curve);\n    }\n\n    var p = pathToAbsolute(path),\n        p2 = path2 && pathToAbsolute(path2),\n        attrs = {\n      x: 0,\n      y: 0,\n      bx: 0,\n      by: 0,\n      X: 0,\n      Y: 0,\n      qx: null,\n      qy: null\n    },\n        attrs2 = {\n      x: 0,\n      y: 0,\n      bx: 0,\n      by: 0,\n      X: 0,\n      Y: 0,\n      qx: null,\n      qy: null\n    },\n        processPath = function processPath(path, d, pcom) {\n      var nx, ny;\n\n      if (!path) {\n        return [\"C\", d.x, d.y, d.x, d.y, d.x, d.y];\n      }\n\n      !(path[0] in {\n        T: 1,\n        Q: 1\n      }) && (d.qx = d.qy = null);\n\n      switch (path[0]) {\n        case \"M\":\n          d.X = path[1];\n          d.Y = path[2];\n          break;\n\n        case \"A\":\n          path = [\"C\"].concat(a2c.apply(0, [d.x, d.y].concat(path.slice(1))));\n          break;\n\n        case \"S\":\n          if (pcom == \"C\" || pcom == \"S\") {\n            // In \"S\" case we have to take into account, if the previous command is C/S.\n            nx = d.x * 2 - d.bx; // And reflect the previous\n\n            ny = d.y * 2 - d.by; // command's control point relative to the current point.\n          } else {\n            // or some else or nothing\n            nx = d.x;\n            ny = d.y;\n          }\n\n          path = [\"C\", nx, ny].concat(path.slice(1));\n          break;\n\n        case \"T\":\n          if (pcom == \"Q\" || pcom == \"T\") {\n            // In \"T\" case we have to take into account, if the previous command is Q/T.\n            d.qx = d.x * 2 - d.qx; // And make a reflection similar\n\n            d.qy = d.y * 2 - d.qy; // to case \"S\".\n          } else {\n            // or something else or nothing\n            d.qx = d.x;\n            d.qy = d.y;\n          }\n\n          path = [\"C\"].concat(q2c(d.x, d.y, d.qx, d.qy, path[1], path[2]));\n          break;\n\n        case \"Q\":\n          d.qx = path[1];\n          d.qy = path[2];\n          path = [\"C\"].concat(q2c(d.x, d.y, path[1], path[2], path[3], path[4]));\n          break;\n\n        case \"L\":\n          path = [\"C\"].concat(l2c(d.x, d.y, path[1], path[2]));\n          break;\n\n        case \"H\":\n          path = [\"C\"].concat(l2c(d.x, d.y, path[1], d.y));\n          break;\n\n        case \"V\":\n          path = [\"C\"].concat(l2c(d.x, d.y, d.x, path[1]));\n          break;\n\n        case \"Z\":\n          path = [\"C\"].concat(l2c(d.x, d.y, d.X, d.Y));\n          break;\n      }\n\n      return path;\n    },\n        fixArc = function fixArc(pp, i) {\n      if (pp[i].length > 7) {\n        pp[i].shift();\n        var pi = pp[i];\n\n        while (pi.length) {\n          pcoms1[i] = \"A\"; // if created multiple C:s, their original seg is saved\n\n          p2 && (pcoms2[i] = \"A\"); // the same as above\n\n          pp.splice(i++, 0, [\"C\"].concat(pi.splice(0, 6)));\n        }\n\n        pp.splice(i, 1);\n        ii = mmax(p.length, p2 && p2.length || 0);\n      }\n    },\n        fixM = function fixM(path1, path2, a1, a2, i) {\n      if (path1 && path2 && path1[i][0] == \"M\" && path2[i][0] != \"M\") {\n        path2.splice(i, 0, [\"M\", a2.x, a2.y]);\n        a1.bx = 0;\n        a1.by = 0;\n        a1.x = path1[i][1];\n        a1.y = path1[i][2];\n        ii = mmax(p.length, p2 && p2.length || 0);\n      }\n    },\n        pcoms1 = [],\n        // path commands of original path p\n    pcoms2 = [],\n        // path commands of original path p2\n    pfirst = \"\",\n        // temporary holder for original path command\n    pcom = \"\"; // holder for previous path command of original path\n\n\n    for (var i = 0, ii = mmax(p.length, p2 && p2.length || 0); i < ii; i++) {\n      p[i] && (pfirst = p[i][0]); // save current path command\n\n      if (pfirst != \"C\") // C is not saved yet, because it may be result of conversion\n        {\n          pcoms1[i] = pfirst; // Save current path command\n\n          i && (pcom = pcoms1[i - 1]); // Get previous path command pcom\n        }\n\n      p[i] = processPath(p[i], attrs, pcom); // Previous path command is inputted to processPath\n\n      if (pcoms1[i] != \"A\" && pfirst == \"C\") pcoms1[i] = \"C\"; // A is the only command\n      // which may produce multiple C:s\n      // so we have to make sure that C is also C in original path\n\n      fixArc(p, i); // fixArc adds also the right amount of A:s to pcoms1\n\n      if (p2) {\n        // the same procedures is done to p2\n        p2[i] && (pfirst = p2[i][0]);\n\n        if (pfirst != \"C\") {\n          pcoms2[i] = pfirst;\n          i && (pcom = pcoms2[i - 1]);\n        }\n\n        p2[i] = processPath(p2[i], attrs2, pcom);\n\n        if (pcoms2[i] != \"A\" && pfirst == \"C\") {\n          pcoms2[i] = \"C\";\n        }\n\n        fixArc(p2, i);\n      }\n\n      fixM(p, p2, attrs, attrs2, i);\n      fixM(p2, p, attrs2, attrs, i);\n      var seg = p[i],\n          seg2 = p2 && p2[i],\n          seglen = seg.length,\n          seg2len = p2 && seg2.length;\n      attrs.x = seg[seglen - 2];\n      attrs.y = seg[seglen - 1];\n      attrs.bx = toFloat(seg[seglen - 4]) || attrs.x;\n      attrs.by = toFloat(seg[seglen - 3]) || attrs.y;\n      attrs2.bx = p2 && (toFloat(seg2[seg2len - 4]) || attrs2.x);\n      attrs2.by = p2 && (toFloat(seg2[seg2len - 3]) || attrs2.y);\n      attrs2.x = p2 && seg2[seg2len - 2];\n      attrs2.y = p2 && seg2[seg2len - 1];\n    }\n\n    if (!p2) {\n      pth.curve = pathClone(p);\n    }\n\n    return p2 ? [p, p2] : p;\n  }\n\n  function mapPath(path, matrix) {\n    if (!matrix) {\n      return path;\n    }\n\n    var x, y, i, j, ii, jj, pathi;\n    path = path2curve(path);\n\n    for (i = 0, ii = path.length; i < ii; i++) {\n      pathi = path[i];\n\n      for (j = 1, jj = pathi.length; j < jj; j += 2) {\n        x = matrix.x(pathi[j], pathi[j + 1]);\n        y = matrix.y(pathi[j], pathi[j + 1]);\n        pathi[j] = x;\n        pathi[j + 1] = y;\n      }\n    }\n\n    return path;\n  } // http://schepers.cc/getting-to-the-point\n\n\n  function catmullRom2bezier(crp, z) {\n    var d = [];\n\n    for (var i = 0, iLen = crp.length; iLen - 2 * !z > i; i += 2) {\n      var p = [{\n        x: +crp[i - 2],\n        y: +crp[i - 1]\n      }, {\n        x: +crp[i],\n        y: +crp[i + 1]\n      }, {\n        x: +crp[i + 2],\n        y: +crp[i + 3]\n      }, {\n        x: +crp[i + 4],\n        y: +crp[i + 5]\n      }];\n\n      if (z) {\n        if (!i) {\n          p[0] = {\n            x: +crp[iLen - 2],\n            y: +crp[iLen - 1]\n          };\n        } else if (iLen - 4 == i) {\n          p[3] = {\n            x: +crp[0],\n            y: +crp[1]\n          };\n        } else if (iLen - 2 == i) {\n          p[2] = {\n            x: +crp[0],\n            y: +crp[1]\n          };\n          p[3] = {\n            x: +crp[2],\n            y: +crp[3]\n          };\n        }\n      } else {\n        if (iLen - 4 == i) {\n          p[3] = p[2];\n        } else if (!i) {\n          p[0] = {\n            x: +crp[i],\n            y: +crp[i + 1]\n          };\n        }\n      }\n\n      d.push([\"C\", (-p[0].x + 6 * p[1].x + p[2].x) / 6, (-p[0].y + 6 * p[1].y + p[2].y) / 6, (p[1].x + 6 * p[2].x - p[3].x) / 6, (p[1].y + 6 * p[2].y - p[3].y) / 6, p[2].x, p[2].y]);\n    }\n\n    return d;\n  } // export\n\n\n  Snap.path = paths;\n  /*\\\n   * Snap.path.getTotalLength\n   [ method ]\n   **\n   * Returns the length of the given path in pixels\n   **\n   - path (string) SVG path string\n   **\n   = (number) length\n  \\*/\n\n  Snap.path.getTotalLength = getTotalLength;\n  /*\\\n   * Snap.path.getPointAtLength\n   [ method ]\n   **\n   * Returns the coordinates of the point located at the given length along the given path\n   **\n   - path (string) SVG path string\n   - length (number) length, in pixels, from the start of the path, excluding non-rendering jumps\n   **\n   = (object) representation of the point:\n   o {\n   o     x: (number) x coordinate,\n   o     y: (number) y coordinate,\n   o     alpha: (number) angle of derivative\n   o }\n  \\*/\n\n  Snap.path.getPointAtLength = getPointAtLength;\n  /*\\\n   * Snap.path.getSubpath\n   [ method ]\n   **\n   * Returns the subpath of a given path between given start and end lengths\n   **\n   - path (string) SVG path string\n   - from (number) length, in pixels, from the start of the path to the start of the segment\n   - to (number) length, in pixels, from the start of the path to the end of the segment\n   **\n   = (string) path string definition for the segment\n  \\*/\n\n  Snap.path.getSubpath = function (path, from, to) {\n    if (this.getTotalLength(path) - to < 1e-6) {\n      return getSubpathsAtLength(path, from).end;\n    }\n\n    var a = getSubpathsAtLength(path, to, 1);\n    return from ? getSubpathsAtLength(a, from).end : a;\n  };\n  /*\\\n   * Element.getTotalLength\n   [ method ]\n   **\n   * Returns the length of the path in pixels (only works for `path` elements)\n   = (number) length\n  \\*/\n\n\n  elproto.getTotalLength = function () {\n    if (this.node.getTotalLength) {\n      return this.node.getTotalLength();\n    }\n  }; // SIERRA Element.getPointAtLength()/Element.getTotalLength(): If a <path> is broken into different segments, is the jump distance to the new coordinates set by the _M_ or _m_ commands calculated as part of the path's total length?\n\n  /*\\\n   * Element.getPointAtLength\n   [ method ]\n   **\n   * Returns coordinates of the point located at the given length on the given path (only works for `path` elements)\n   **\n   - length (number) length, in pixels, from the start of the path, excluding non-rendering jumps\n   **\n   = (object) representation of the point:\n   o {\n   o     x: (number) x coordinate,\n   o     y: (number) y coordinate,\n   o     alpha: (number) angle of derivative\n   o }\n  \\*/\n\n\n  elproto.getPointAtLength = function (length) {\n    return getPointAtLength(this.attr(\"d\"), length);\n  }; // SIERRA Element.getSubpath(): Similar to the problem for Element.getPointAtLength(). Unclear how this would work for a segmented path. Overall, the concept of _subpath_ and what I'm calling a _segment_ (series of non-_M_ or _Z_ commands) is unclear.\n\n  /*\\\n   * Element.getSubpath\n   [ method ]\n   **\n   * Returns subpath of a given element from given start and end lengths (only works for `path` elements)\n   **\n   - from (number) length, in pixels, from the start of the path to the start of the segment\n   - to (number) length, in pixels, from the start of the path to the end of the segment\n   **\n   = (string) path string definition for the segment\n  \\*/\n\n\n  elproto.getSubpath = function (from, to) {\n    return Snap.path.getSubpath(this.attr(\"d\"), from, to);\n  };\n\n  Snap._.box = box;\n  /*\\\n   * Snap.path.findDotsAtSegment\n   [ method ]\n   **\n   * Utility method\n   **\n   * Finds dot coordinates on the given cubic beziér curve at the given t\n   - p1x (number) x of the first point of the curve\n   - p1y (number) y of the first point of the curve\n   - c1x (number) x of the first anchor of the curve\n   - c1y (number) y of the first anchor of the curve\n   - c2x (number) x of the second anchor of the curve\n   - c2y (number) y of the second anchor of the curve\n   - p2x (number) x of the second point of the curve\n   - p2y (number) y of the second point of the curve\n   - t (number) position on the curve (0..1)\n   = (object) point information in format:\n   o {\n   o     x: (number) x coordinate of the point,\n   o     y: (number) y coordinate of the point,\n   o     m: {\n   o         x: (number) x coordinate of the left anchor,\n   o         y: (number) y coordinate of the left anchor\n   o     },\n   o     n: {\n   o         x: (number) x coordinate of the right anchor,\n   o         y: (number) y coordinate of the right anchor\n   o     },\n   o     start: {\n   o         x: (number) x coordinate of the start of the curve,\n   o         y: (number) y coordinate of the start of the curve\n   o     },\n   o     end: {\n   o         x: (number) x coordinate of the end of the curve,\n   o         y: (number) y coordinate of the end of the curve\n   o     },\n   o     alpha: (number) angle of the curve derivative at the point\n   o }\n  \\*/\n\n  Snap.path.findDotsAtSegment = findDotsAtSegment;\n  /*\\\n   * Snap.path.bezierBBox\n   [ method ]\n   **\n   * Utility method\n   **\n   * Returns the bounding box of a given cubic beziér curve\n   - p1x (number) x of the first point of the curve\n   - p1y (number) y of the first point of the curve\n   - c1x (number) x of the first anchor of the curve\n   - c1y (number) y of the first anchor of the curve\n   - c2x (number) x of the second anchor of the curve\n   - c2y (number) y of the second anchor of the curve\n   - p2x (number) x of the second point of the curve\n   - p2y (number) y of the second point of the curve\n   * or\n   - bez (array) array of six points for beziér curve\n   = (object) bounding box\n   o {\n   o     x: (number) x coordinate of the left top point of the box,\n   o     y: (number) y coordinate of the left top point of the box,\n   o     x2: (number) x coordinate of the right bottom point of the box,\n   o     y2: (number) y coordinate of the right bottom point of the box,\n   o     width: (number) width of the box,\n   o     height: (number) height of the box\n   o }\n  \\*/\n\n  Snap.path.bezierBBox = bezierBBox;\n  /*\\\n   * Snap.path.isPointInsideBBox\n   [ method ]\n   **\n   * Utility method\n   **\n   * Returns `true` if given point is inside bounding box\n   - bbox (string) bounding box\n   - x (string) x coordinate of the point\n   - y (string) y coordinate of the point\n   = (boolean) `true` if point is inside\n  \\*/\n\n  Snap.path.isPointInsideBBox = isPointInsideBBox;\n\n  Snap.closest = function (x, y, X, Y) {\n    var r = 100,\n        b = box(x - r / 2, y - r / 2, r, r),\n        inside = [],\n        getter = X[0].hasOwnProperty(\"x\") ? function (i) {\n      return {\n        x: X[i].x,\n        y: X[i].y\n      };\n    } : function (i) {\n      return {\n        x: X[i],\n        y: Y[i]\n      };\n    },\n        found = 0;\n\n    while (r <= 1e6 && !found) {\n      for (var i = 0, ii = X.length; i < ii; i++) {\n        var xy = getter(i);\n\n        if (isPointInsideBBox(b, xy.x, xy.y)) {\n          found++;\n          inside.push(xy);\n          break;\n        }\n      }\n\n      if (!found) {\n        r *= 2;\n        b = box(x - r / 2, y - r / 2, r, r);\n      }\n    }\n\n    if (r == 1e6) {\n      return;\n    }\n\n    var len = Infinity,\n        res;\n\n    for (i = 0, ii = inside.length; i < ii; i++) {\n      var l = Snap.len(x, y, inside[i].x, inside[i].y);\n\n      if (len > l) {\n        len = l;\n        inside[i].len = l;\n        res = inside[i];\n      }\n    }\n\n    return res;\n  };\n  /*\\\n   * Snap.path.isBBoxIntersect\n   [ method ]\n   **\n   * Utility method\n   **\n   * Returns `true` if two bounding boxes intersect\n   - bbox1 (string) first bounding box\n   - bbox2 (string) second bounding box\n   = (boolean) `true` if bounding boxes intersect\n  \\*/\n\n\n  Snap.path.isBBoxIntersect = isBBoxIntersect;\n  /*\\\n   * Snap.path.intersection\n   [ method ]\n   **\n   * Utility method\n   **\n   * Finds intersections of two paths\n   - path1 (string) path string\n   - path2 (string) path string\n   = (array) dots of intersection\n   o [\n   o     {\n   o         x: (number) x coordinate of the point,\n   o         y: (number) y coordinate of the point,\n   o         t1: (number) t value for segment of path1,\n   o         t2: (number) t value for segment of path2,\n   o         segment1: (number) order number for segment of path1,\n   o         segment2: (number) order number for segment of path2,\n   o         bez1: (array) eight coordinates representing beziér curve for the segment of path1,\n   o         bez2: (array) eight coordinates representing beziér curve for the segment of path2\n   o     }\n   o ]\n  \\*/\n\n  Snap.path.intersection = pathIntersection;\n  Snap.path.intersectionNumber = pathIntersectionNumber;\n  /*\\\n   * Snap.path.isPointInside\n   [ method ]\n   **\n   * Utility method\n   **\n   * Returns `true` if given point is inside a given closed path.\n   *\n   * Note: fill mode doesn’t affect the result of this method.\n   - path (string) path string\n   - x (number) x of the point\n   - y (number) y of the point\n   = (boolean) `true` if point is inside the path\n  \\*/\n\n  Snap.path.isPointInside = isPointInsidePath;\n  /*\\\n   * Snap.path.getBBox\n   [ method ]\n   **\n   * Utility method\n   **\n   * Returns the bounding box of a given path\n   - path (string) path string\n   = (object) bounding box\n   o {\n   o     x: (number) x coordinate of the left top point of the box,\n   o     y: (number) y coordinate of the left top point of the box,\n   o     x2: (number) x coordinate of the right bottom point of the box,\n   o     y2: (number) y coordinate of the right bottom point of the box,\n   o     width: (number) width of the box,\n   o     height: (number) height of the box\n   o }\n  \\*/\n\n  Snap.path.getBBox = pathBBox;\n  Snap.path.get = getPath;\n  /*\\\n   * Snap.path.toRelative\n   [ method ]\n   **\n   * Utility method\n   **\n   * Converts path coordinates into relative values\n   - path (string) path string\n   = (array) path string\n  \\*/\n\n  Snap.path.toRelative = pathToRelative;\n  /*\\\n   * Snap.path.toAbsolute\n   [ method ]\n   **\n   * Utility method\n   **\n   * Converts path coordinates into absolute values\n   - path (string) path string\n   = (array) path string\n  \\*/\n\n  Snap.path.toAbsolute = pathToAbsolute;\n  /*\\\n   * Snap.path.toCubic\n   [ method ]\n   **\n   * Utility method\n   **\n   * Converts path to a new path where all segments are cubic beziér curves\n   - pathString (string|array) path string or array of segments\n   = (array) array of segments\n  \\*/\n\n  Snap.path.toCubic = path2curve;\n  /*\\\n   * Snap.path.map\n   [ method ]\n   **\n   * Transform the path string with the given matrix\n   - path (string) path string\n   - matrix (object) see @Matrix\n   = (string) transformed path string\n  \\*/\n\n  Snap.path.map = mapPath;\n  Snap.path.toString = toString;\n  Snap.path.clone = pathClone;\n}); // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nSnap.plugin(function (Snap, Element, Paper, glob) {\n  var mmax = Math.max,\n      mmin = Math.min; // Set\n\n  var Set = function Set(items) {\n    this.items = [];\n    this.bindings = {};\n    this.length = 0;\n    this.type = \"set\";\n\n    if (items) {\n      for (var i = 0, ii = items.length; i < ii; i++) {\n        if (items[i]) {\n          this[this.items.length] = this.items[this.items.length] = items[i];\n          this.length++;\n        }\n      }\n    }\n  },\n      setproto = Set.prototype;\n  /*\\\n   * Set.push\n   [ method ]\n   **\n   * Adds each argument to the current set\n   = (object) original element\n  \\*/\n\n\n  setproto.push = function () {\n    var item, len;\n\n    for (var i = 0, ii = arguments.length; i < ii; i++) {\n      item = arguments[i];\n\n      if (item) {\n        len = this.items.length;\n        this[len] = this.items[len] = item;\n        this.length++;\n      }\n    }\n\n    return this;\n  };\n  /*\\\n   * Set.pop\n   [ method ]\n   **\n   * Removes last element and returns it\n   = (object) element\n  \\*/\n\n\n  setproto.pop = function () {\n    this.length && delete this[this.length--];\n    return this.items.pop();\n  };\n  /*\\\n   * Set.forEach\n   [ method ]\n   **\n   * Executes given function for each element in the set\n   *\n   * If the function returns `false`, the loop stops running.\n   **\n   - callback (function) function to run\n   - thisArg (object) context object for the callback\n   = (object) Set object\n  \\*/\n\n\n  setproto.forEach = function (callback, thisArg) {\n    for (var i = 0, ii = this.items.length; i < ii; i++) {\n      if (callback.call(thisArg, this.items[i], i) === false) {\n        return this;\n      }\n    }\n\n    return this;\n  };\n  /*\\\n   * Set.animate\n   [ method ]\n   **\n   * Animates each element in set in sync.\n   *\n   **\n   - attrs (object) key-value pairs of destination attributes\n   - duration (number) duration of the animation in milliseconds\n   - easing (function) #optional easing function from @mina or custom\n   - callback (function) #optional callback function that executes when the animation ends\n   * or\n   - animation (array) array of animation parameter for each element in set in format `[attrs, duration, easing, callback]`\n   > Usage\n   | // animate all elements in set to radius 10\n   | set.animate({r: 10}, 500, mina.easein);\n   | // or\n   | // animate first element to radius 10, but second to radius 20 and in different time\n   | set.animate([{r: 10}, 500, mina.easein], [{r: 20}, 1500, mina.easein]);\n   = (Element) the current element\n  \\*/\n\n\n  setproto.animate = function (attrs, ms, easing, callback) {\n    if (typeof easing == \"function\" && !easing.length) {\n      callback = easing;\n      easing = mina.linear;\n    }\n\n    if (attrs instanceof Snap._.Animation) {\n      callback = attrs.callback;\n      easing = attrs.easing;\n      ms = easing.dur;\n      attrs = attrs.attr;\n    }\n\n    var args = arguments;\n\n    if (Snap.is(attrs, \"array\") && Snap.is(args[args.length - 1], \"array\")) {\n      var each = true;\n    }\n\n    var begin,\n        handler = function handler() {\n      if (begin) {\n        this.b = begin;\n      } else {\n        begin = this.b;\n      }\n    },\n        cb = 0,\n        set = this,\n        callbacker = callback && function () {\n      if (++cb == set.length) {\n        callback.call(this);\n      }\n    };\n\n    return this.forEach(function (el, i) {\n      eve.once(\"snap.animcreated.\" + el.id, handler);\n\n      if (each) {\n        args[i] && el.animate.apply(el, args[i]);\n      } else {\n        el.animate(attrs, ms, easing, callbacker);\n      }\n    });\n  };\n  /*\\\n   * Set.remove\n   [ method ]\n   **\n   * Removes all children of the set.\n   *\n   = (object) Set object\n  \\*/\n\n\n  setproto.remove = function () {\n    while (this.length) {\n      this.pop().remove();\n    }\n\n    return this;\n  };\n  /*\\\n   * Set.bind\n   [ method ]\n   **\n   * Specifies how to handle a specific attribute when applied\n   * to a set.\n   *\n   **\n   - attr (string) attribute name\n   - callback (function) function to run\n   * or\n   - attr (string) attribute name\n   - element (Element) specific element in the set to apply the attribute to\n   * or\n   - attr (string) attribute name\n   - element (Element) specific element in the set to apply the attribute to\n   - eattr (string) attribute on the element to bind the attribute to\n   = (object) Set object\n  \\*/\n\n\n  setproto.bind = function (attr, a, b) {\n    var data = {};\n\n    if (typeof a == \"function\") {\n      this.bindings[attr] = a;\n    } else {\n      var aname = b || attr;\n\n      this.bindings[attr] = function (v) {\n        data[aname] = v;\n        a.attr(data);\n      };\n    }\n\n    return this;\n  };\n  /*\\\n   * Set.attr\n   [ method ]\n   **\n   * Equivalent of @Element.attr.\n   = (object) Set object\n  \\*/\n\n\n  setproto.attr = function (value) {\n    var unbound = {};\n\n    for (var k in value) {\n      if (this.bindings[k]) {\n        this.bindings[k](value[k]);\n      } else {\n        unbound[k] = value[k];\n      }\n    }\n\n    for (var i = 0, ii = this.items.length; i < ii; i++) {\n      this.items[i].attr(unbound);\n    }\n\n    return this;\n  };\n  /*\\\n   * Set.clear\n   [ method ]\n   **\n   * Removes all elements from the set\n  \\*/\n\n\n  setproto.clear = function () {\n    while (this.length) {\n      this.pop();\n    }\n  };\n  /*\\\n   * Set.splice\n   [ method ]\n   **\n   * Removes range of elements from the set\n   **\n   - index (number) position of the deletion\n   - count (number) number of element to remove\n   - insertion… (object) #optional elements to insert\n   = (object) set elements that were deleted\n  \\*/\n\n\n  setproto.splice = function (index, count, insertion) {\n    index = index < 0 ? mmax(this.length + index, 0) : index;\n    count = mmax(0, mmin(this.length - index, count));\n    var tail = [],\n        todel = [],\n        args = [],\n        i;\n\n    for (i = 2; i < arguments.length; i++) {\n      args.push(arguments[i]);\n    }\n\n    for (i = 0; i < count; i++) {\n      todel.push(this[index + i]);\n    }\n\n    for (; i < this.length - index; i++) {\n      tail.push(this[index + i]);\n    }\n\n    var arglen = args.length;\n\n    for (i = 0; i < arglen + tail.length; i++) {\n      this.items[index + i] = this[index + i] = i < arglen ? args[i] : tail[i - arglen];\n    }\n\n    i = this.items.length = this.length -= count - arglen;\n\n    while (this[i]) {\n      delete this[i++];\n    }\n\n    return new Set(todel);\n  };\n  /*\\\n   * Set.exclude\n   [ method ]\n   **\n   * Removes given element from the set\n   **\n   - element (object) element to remove\n   = (boolean) `true` if object was found and removed from the set\n  \\*/\n\n\n  setproto.exclude = function (el) {\n    for (var i = 0, ii = this.length; i < ii; i++) {\n      if (this[i] == el) {\n        this.splice(i, 1);\n        return true;\n      }\n    }\n\n    return false;\n  };\n  /*\\\n   * Set.insertAfter\n   [ method ]\n   **\n   * Inserts set elements after given element.\n   **\n   - element (object) set will be inserted after this element\n   = (object) Set object\n  \\*/\n\n\n  setproto.insertAfter = function (el) {\n    var i = this.items.length;\n\n    while (i--) {\n      this.items[i].insertAfter(el);\n    }\n\n    return this;\n  };\n  /*\\\n   * Set.getBBox\n   [ method ]\n   **\n   * Union of all bboxes of the set. See @Element.getBBox.\n   = (object) bounding box descriptor. See @Element.getBBox.\n  \\*/\n\n\n  setproto.getBBox = function () {\n    var x = [],\n        y = [],\n        x2 = [],\n        y2 = [];\n\n    for (var i = this.items.length; i--;) {\n      if (!this.items[i].removed) {\n        var box = this.items[i].getBBox();\n        x.push(box.x);\n        y.push(box.y);\n        x2.push(box.x + box.width);\n        y2.push(box.y + box.height);\n      }\n    }\n\n    x = mmin.apply(0, x);\n    y = mmin.apply(0, y);\n    x2 = mmax.apply(0, x2);\n    y2 = mmax.apply(0, y2);\n    return {\n      x: x,\n      y: y,\n      x2: x2,\n      y2: y2,\n      width: x2 - x,\n      height: y2 - y,\n      cx: x + (x2 - x) / 2,\n      cy: y + (y2 - y) / 2\n    };\n  };\n  /*\\\n   * Set.insertAfter\n   [ method ]\n   **\n   * Creates a clone of the set.\n   **\n   = (object) New Set object\n  \\*/\n\n\n  setproto.clone = function (s) {\n    s = new Set();\n\n    for (var i = 0, ii = this.items.length; i < ii; i++) {\n      s.push(this.items[i].clone());\n    }\n\n    return s;\n  };\n\n  setproto.toString = function () {\n    return \"Snap\\u2018s set\";\n  };\n\n  setproto.type = \"set\"; // export\n\n  /*\\\n   * Snap.Set\n   [ property ]\n   **\n   * Set constructor.\n  \\*/\n\n  Snap.Set = Set;\n  /*\\\n   * Snap.set\n   [ method ]\n   **\n   * Creates a set and fills it with list of arguments.\n   **\n   = (object) New Set object\n   | var r = paper.rect(0, 0, 10, 10),\n   |     s1 = Snap.set(), // empty set\n   |     s2 = Snap.set(r, paper.circle(100, 100, 20)); // prefilled set\n  \\*/\n\n  Snap.set = function () {\n    var set = new Set();\n\n    if (arguments.length) {\n      set.push.apply(set, Array.prototype.slice.call(arguments, 0));\n    }\n\n    return set;\n  };\n}); // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nSnap.plugin(function (Snap, Element, Paper, glob) {\n  var names = {},\n      reUnit = /[%a-z]+$/i,\n      Str = String;\n  names.stroke = names.fill = \"colour\";\n\n  function getEmpty(item) {\n    var l = item[0];\n\n    switch (l.toLowerCase()) {\n      case \"t\":\n        return [l, 0, 0];\n\n      case \"m\":\n        return [l, 1, 0, 0, 1, 0, 0];\n\n      case \"r\":\n        if (item.length == 4) {\n          return [l, 0, item[2], item[3]];\n        } else {\n          return [l, 0];\n        }\n\n      case \"s\":\n        if (item.length == 5) {\n          return [l, 1, 1, item[3], item[4]];\n        } else if (item.length == 3) {\n          return [l, 1, 1];\n        } else {\n          return [l, 1];\n        }\n\n    }\n  }\n\n  function equaliseTransform(t1, t2, getBBox) {\n    t1 = t1 || new Snap.Matrix();\n    t2 = t2 || new Snap.Matrix();\n    t1 = Snap.parseTransformString(t1.toTransformString()) || [];\n    t2 = Snap.parseTransformString(t2.toTransformString()) || [];\n    var maxlength = Math.max(t1.length, t2.length),\n        from = [],\n        to = [],\n        i = 0,\n        j,\n        jj,\n        tt1,\n        tt2;\n\n    for (; i < maxlength; i++) {\n      tt1 = t1[i] || getEmpty(t2[i]);\n      tt2 = t2[i] || getEmpty(tt1);\n\n      if (tt1[0] != tt2[0] || tt1[0].toLowerCase() == \"r\" && (tt1[2] != tt2[2] || tt1[3] != tt2[3]) || tt1[0].toLowerCase() == \"s\" && (tt1[3] != tt2[3] || tt1[4] != tt2[4])) {\n        t1 = Snap._.transform2matrix(t1, getBBox());\n        t2 = Snap._.transform2matrix(t2, getBBox());\n        from = [[\"m\", t1.a, t1.b, t1.c, t1.d, t1.e, t1.f]];\n        to = [[\"m\", t2.a, t2.b, t2.c, t2.d, t2.e, t2.f]];\n        break;\n      }\n\n      from[i] = [];\n      to[i] = [];\n\n      for (j = 0, jj = Math.max(tt1.length, tt2.length); j < jj; j++) {\n        j in tt1 && (from[i][j] = tt1[j]);\n        j in tt2 && (to[i][j] = tt2[j]);\n      }\n    }\n\n    return {\n      from: path2array(from),\n      to: path2array(to),\n      f: getPath(from)\n    };\n  }\n\n  function getNumber(val) {\n    return val;\n  }\n\n  function getUnit(unit) {\n    return function (val) {\n      return +val.toFixed(3) + unit;\n    };\n  }\n\n  function getViewBox(val) {\n    return val.join(\" \");\n  }\n\n  function getColour(clr) {\n    return Snap.rgb(clr[0], clr[1], clr[2], clr[3]);\n  }\n\n  function getPath(path) {\n    var k = 0,\n        i,\n        ii,\n        j,\n        jj,\n        out,\n        a,\n        b = [];\n\n    for (i = 0, ii = path.length; i < ii; i++) {\n      out = \"[\";\n      a = ['\"' + path[i][0] + '\"'];\n\n      for (j = 1, jj = path[i].length; j < jj; j++) {\n        a[j] = \"val[\" + k++ + \"]\";\n      }\n\n      out += a + \"]\";\n      b[i] = out;\n    }\n\n    return Function(\"val\", \"return Snap.path.toString.call([\" + b + \"])\");\n  }\n\n  function path2array(path) {\n    var out = [];\n\n    for (var i = 0, ii = path.length; i < ii; i++) {\n      for (var j = 1, jj = path[i].length; j < jj; j++) {\n        out.push(path[i][j]);\n      }\n    }\n\n    return out;\n  }\n\n  function isNumeric(obj) {\n    return isFinite(obj);\n  }\n\n  function arrayEqual(arr1, arr2) {\n    if (!Snap.is(arr1, \"array\") || !Snap.is(arr2, \"array\")) {\n      return false;\n    }\n\n    return arr1.toString() == arr2.toString();\n  }\n\n  Element.prototype.equal = function (name, b) {\n    return eve(\"snap.util.equal\", this, name, b).firstDefined();\n  };\n\n  eve.on(\"snap.util.equal\", function (name, b) {\n    var A,\n        B,\n        a = Str(this.attr(name) || \"\"),\n        el = this;\n\n    if (names[name] == \"colour\") {\n      A = Snap.color(a);\n      B = Snap.color(b);\n      return {\n        from: [A.r, A.g, A.b, A.opacity],\n        to: [B.r, B.g, B.b, B.opacity],\n        f: getColour\n      };\n    }\n\n    if (name == \"viewBox\") {\n      A = this.attr(name).vb.split(\" \").map(Number);\n      B = b.split(\" \").map(Number);\n      return {\n        from: A,\n        to: B,\n        f: getViewBox\n      };\n    }\n\n    if (name == \"transform\" || name == \"gradientTransform\" || name == \"patternTransform\") {\n      if (typeof b == \"string\") {\n        b = Str(b).replace(/\\.{3}|\\u2026/g, a);\n      }\n\n      a = this.matrix;\n\n      if (!Snap._.rgTransform.test(b)) {\n        b = Snap._.transform2matrix(Snap._.svgTransform2string(b), this.getBBox());\n      } else {\n        b = Snap._.transform2matrix(b, this.getBBox());\n      }\n\n      return equaliseTransform(a, b, function () {\n        return el.getBBox(1);\n      });\n    }\n\n    if (name == \"d\" || name == \"path\") {\n      A = Snap.path.toCubic(a, b);\n      return {\n        from: path2array(A[0]),\n        to: path2array(A[1]),\n        f: getPath(A[0])\n      };\n    }\n\n    if (name == \"points\") {\n      A = Str(a).split(Snap._.separator);\n      B = Str(b).split(Snap._.separator);\n      return {\n        from: A,\n        to: B,\n        f: function f(val) {\n          return val;\n        }\n      };\n    }\n\n    if (isNumeric(a) && isNumeric(b)) {\n      return {\n        from: parseFloat(a),\n        to: parseFloat(b),\n        f: getNumber\n      };\n    }\n\n    var aUnit = a.match(reUnit),\n        bUnit = Str(b).match(reUnit);\n\n    if (aUnit && arrayEqual(aUnit, bUnit)) {\n      return {\n        from: parseFloat(a),\n        to: parseFloat(b),\n        f: getUnit(aUnit)\n      };\n    } else {\n      return {\n        from: this.asPX(name),\n        to: this.asPX(name, b),\n        f: getNumber\n      };\n    }\n  });\n}); // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.\n// \n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n// \n// http://www.apache.org/licenses/LICENSE-2.0\n// \n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nSnap.plugin(function (Snap, Element, Paper, glob) {\n  var elproto = Element.prototype,\n      has = \"hasOwnProperty\",\n      supportsTouch = (\"createTouch\" in glob.doc),\n      events = [\"click\", \"dblclick\", \"mousedown\", \"mousemove\", \"mouseout\", \"mouseover\", \"mouseup\", \"touchstart\", \"touchmove\", \"touchend\", \"touchcancel\"],\n      touchMap = {\n    mousedown: \"touchstart\",\n    mousemove: \"touchmove\",\n    mouseup: \"touchend\"\n  },\n      getScroll = function getScroll(xy, el) {\n    var name = xy == \"y\" ? \"scrollTop\" : \"scrollLeft\",\n        doc = el && el.node ? el.node.ownerDocument : glob.doc;\n    return doc[name in doc.documentElement ? \"documentElement\" : \"body\"][name];\n  },\n      preventDefault = function preventDefault() {\n    this.returnValue = false;\n  },\n      preventTouch = function preventTouch() {\n    return this.originalEvent.preventDefault();\n  },\n      stopPropagation = function stopPropagation() {\n    this.cancelBubble = true;\n  },\n      stopTouch = function stopTouch() {\n    return this.originalEvent.stopPropagation();\n  },\n      addEvent = function addEvent(obj, type, fn, element) {\n    var realName = supportsTouch && touchMap[type] ? touchMap[type] : type,\n        f = function f(e) {\n      var scrollY = getScroll(\"y\", element),\n          scrollX = getScroll(\"x\", element);\n\n      if (supportsTouch && touchMap[has](type)) {\n        for (var i = 0, ii = e.targetTouches && e.targetTouches.length; i < ii; i++) {\n          if (e.targetTouches[i].target == obj || obj.contains(e.targetTouches[i].target)) {\n            var olde = e;\n            e = e.targetTouches[i];\n            e.originalEvent = olde;\n            e.preventDefault = preventTouch;\n            e.stopPropagation = stopTouch;\n            break;\n          }\n        }\n      }\n\n      var x = e.clientX + scrollX,\n          y = e.clientY + scrollY;\n      return fn.call(element, e, x, y);\n    };\n\n    if (type !== realName) {\n      obj.addEventListener(type, f, false);\n    }\n\n    obj.addEventListener(realName, f, false);\n    return function () {\n      if (type !== realName) {\n        obj.removeEventListener(type, f, false);\n      }\n\n      obj.removeEventListener(realName, f, false);\n      return true;\n    };\n  },\n      drag = [],\n      dragMove = function dragMove(e) {\n    var x = e.clientX,\n        y = e.clientY,\n        scrollY = getScroll(\"y\"),\n        scrollX = getScroll(\"x\"),\n        dragi,\n        j = drag.length;\n\n    while (j--) {\n      dragi = drag[j];\n\n      if (supportsTouch) {\n        var i = e.touches && e.touches.length,\n            touch;\n\n        while (i--) {\n          touch = e.touches[i];\n\n          if (touch.identifier == dragi.el._drag.id || dragi.el.node.contains(touch.target)) {\n            x = touch.clientX;\n            y = touch.clientY;\n            (e.originalEvent ? e.originalEvent : e).preventDefault();\n            break;\n          }\n        }\n      } else {\n        e.preventDefault();\n      }\n\n      var node = dragi.el.node,\n          o,\n          next = node.nextSibling,\n          parent = node.parentNode,\n          display = node.style.display; // glob.win.opera && parent.removeChild(node);\n      // node.style.display = \"none\";\n      // o = dragi.el.paper.getElementByPoint(x, y);\n      // node.style.display = display;\n      // glob.win.opera && (next ? parent.insertBefore(node, next) : parent.appendChild(node));\n      // o && eve(\"snap.drag.over.\" + dragi.el.id, dragi.el, o);\n\n      x += scrollX;\n      y += scrollY;\n      eve(\"snap.drag.move.\" + dragi.el.id, dragi.move_scope || dragi.el, x - dragi.el._drag.x, y - dragi.el._drag.y, x, y, e);\n    }\n  },\n      dragUp = function dragUp(e) {\n    Snap.unmousemove(dragMove).unmouseup(dragUp);\n    var i = drag.length,\n        dragi;\n\n    while (i--) {\n      dragi = drag[i];\n      dragi.el._drag = {};\n      eve(\"snap.drag.end.\" + dragi.el.id, dragi.end_scope || dragi.start_scope || dragi.move_scope || dragi.el, e);\n      eve.off(\"snap.drag.*.\" + dragi.el.id);\n    }\n\n    drag = [];\n  };\n  /*\\\n   * Element.click\n   [ method ]\n   **\n   * Adds a click event handler to the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.unclick\n   [ method ]\n   **\n   * Removes a click event handler from the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.dblclick\n   [ method ]\n   **\n   * Adds a double click event handler to the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.undblclick\n   [ method ]\n   **\n   * Removes a double click event handler from the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.mousedown\n   [ method ]\n   **\n   * Adds a mousedown event handler to the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.unmousedown\n   [ method ]\n   **\n   * Removes a mousedown event handler from the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.mousemove\n   [ method ]\n   **\n   * Adds a mousemove event handler to the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.unmousemove\n   [ method ]\n   **\n   * Removes a mousemove event handler from the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.mouseout\n   [ method ]\n   **\n   * Adds a mouseout event handler to the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.unmouseout\n   [ method ]\n   **\n   * Removes a mouseout event handler from the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.mouseover\n   [ method ]\n   **\n   * Adds a mouseover event handler to the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.unmouseover\n   [ method ]\n   **\n   * Removes a mouseover event handler from the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.mouseup\n   [ method ]\n   **\n   * Adds a mouseup event handler to the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.unmouseup\n   [ method ]\n   **\n   * Removes a mouseup event handler from the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.touchstart\n   [ method ]\n   **\n   * Adds a touchstart event handler to the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.untouchstart\n   [ method ]\n   **\n   * Removes a touchstart event handler from the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.touchmove\n   [ method ]\n   **\n   * Adds a touchmove event handler to the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.untouchmove\n   [ method ]\n   **\n   * Removes a touchmove event handler from the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.touchend\n   [ method ]\n   **\n   * Adds a touchend event handler to the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.untouchend\n   [ method ]\n   **\n   * Removes a touchend event handler from the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.touchcancel\n   [ method ]\n   **\n   * Adds a touchcancel event handler to the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n  /*\\\n   * Element.untouchcancel\n   [ method ]\n   **\n   * Removes a touchcancel event handler from the element\n   - handler (function) handler for the event\n   = (object) @Element\n  \\*/\n\n\n  for (var i = events.length; i--;) {\n    (function (eventName) {\n      Snap[eventName] = elproto[eventName] = function (fn, scope) {\n        if (Snap.is(fn, \"function\")) {\n          this.events = this.events || [];\n          this.events.push({\n            name: eventName,\n            f: fn,\n            unbind: addEvent(this.node || document, eventName, fn, scope || this)\n          });\n        } else {\n          for (var i = 0, ii = this.events.length; i < ii; i++) {\n            if (this.events[i].name == eventName) {\n              try {\n                this.events[i].f.call(this);\n              } catch (e) {}\n            }\n          }\n        }\n\n        return this;\n      };\n\n      Snap[\"un\" + eventName] = elproto[\"un\" + eventName] = function (fn) {\n        var events = this.events || [],\n            l = events.length;\n\n        while (l--) {\n          if (events[l].name == eventName && (events[l].f == fn || !fn)) {\n            events[l].unbind();\n            events.splice(l, 1);\n            !events.length && delete this.events;\n            return this;\n          }\n        }\n\n        return this;\n      };\n    })(events[i]);\n  }\n  /*\\\n   * Element.hover\n   [ method ]\n   **\n   * Adds hover event handlers to the element\n   - f_in (function) handler for hover in\n   - f_out (function) handler for hover out\n   - icontext (object) #optional context for hover in handler\n   - ocontext (object) #optional context for hover out handler\n   = (object) @Element\n  \\*/\n\n\n  elproto.hover = function (f_in, f_out, scope_in, scope_out) {\n    return this.mouseover(f_in, scope_in).mouseout(f_out, scope_out || scope_in);\n  };\n  /*\\\n   * Element.unhover\n   [ method ]\n   **\n   * Removes hover event handlers from the element\n   - f_in (function) handler for hover in\n   - f_out (function) handler for hover out\n   = (object) @Element\n  \\*/\n\n\n  elproto.unhover = function (f_in, f_out) {\n    return this.unmouseover(f_in).unmouseout(f_out);\n  };\n\n  var draggable = []; // SIERRA unclear what _context_ refers to for starting, ending, moving the drag gesture.\n  // SIERRA Element.drag(): _x position of the mouse_: Where are the x/y values offset from?\n  // SIERRA Element.drag(): much of this member's doc appears to be duplicated for some reason.\n  // SIERRA Unclear about this sentence: _Additionally following drag events will be triggered: drag.start.<id> on start, drag.end.<id> on end and drag.move.<id> on every move._ Is there a global _drag_ object to which you can assign handlers keyed by an element's ID?\n\n  /*\\\n   * Element.drag\n   [ method ]\n   **\n   * Adds event handlers for an element's drag gesture\n   **\n   - onmove (function) handler for moving\n   - onstart (function) handler for drag start\n   - onend (function) handler for drag end\n   - mcontext (object) #optional context for moving handler\n   - scontext (object) #optional context for drag start handler\n   - econtext (object) #optional context for drag end handler\n   * Additionaly following `drag` events are triggered: `drag.start.<id>` on start, \n   * `drag.end.<id>` on end and `drag.move.<id>` on every move. When element is dragged over another element \n   * `drag.over.<id>` fires as well.\n   *\n   * Start event and start handler are called in specified context or in context of the element with following parameters:\n   o x (number) x position of the mouse\n   o y (number) y position of the mouse\n   o event (object) DOM event object\n   * Move event and move handler are called in specified context or in context of the element with following parameters:\n   o dx (number) shift by x from the start point\n   o dy (number) shift by y from the start point\n   o x (number) x position of the mouse\n   o y (number) y position of the mouse\n   o event (object) DOM event object\n   * End event and end handler are called in specified context or in context of the element with following parameters:\n   o event (object) DOM event object\n   = (object) @Element\n  \\*/\n\n  elproto.drag = function (onmove, onstart, onend, move_scope, start_scope, end_scope) {\n    var el = this;\n\n    if (!arguments.length) {\n      var origTransform;\n      return el.drag(function (dx, dy) {\n        this.attr({\n          transform: origTransform + (origTransform ? \"T\" : \"t\") + [dx, dy]\n        });\n      }, function () {\n        origTransform = this.transform().local;\n      });\n    }\n\n    function start(e, x, y) {\n      (e.originalEvent || e).preventDefault();\n      el._drag.x = x;\n      el._drag.y = y;\n      el._drag.id = e.identifier;\n      !drag.length && Snap.mousemove(dragMove).mouseup(dragUp);\n      drag.push({\n        el: el,\n        move_scope: move_scope,\n        start_scope: start_scope,\n        end_scope: end_scope\n      });\n      onstart && eve.on(\"snap.drag.start.\" + el.id, onstart);\n      onmove && eve.on(\"snap.drag.move.\" + el.id, onmove);\n      onend && eve.on(\"snap.drag.end.\" + el.id, onend);\n      eve(\"snap.drag.start.\" + el.id, start_scope || move_scope || el, x, y, e);\n    }\n\n    function init(e, x, y) {\n      eve(\"snap.draginit.\" + el.id, el, e, x, y);\n    }\n\n    eve.on(\"snap.draginit.\" + el.id, start);\n    el._drag = {};\n    draggable.push({\n      el: el,\n      start: start,\n      init: init\n    });\n    el.mousedown(init);\n    return el;\n  };\n  /*\n   * Element.onDragOver\n   [ method ]\n   **\n   * Shortcut to assign event handler for `drag.over.<id>` event, where `id` is the element's `id` (see @Element.id)\n   - f (function) handler for event, first argument would be the element you are dragging over\n  \\*/\n  // elproto.onDragOver = function (f) {\n  //     f ? eve.on(\"snap.drag.over.\" + this.id, f) : eve.unbind(\"snap.drag.over.\" + this.id);\n  // };\n\n  /*\\\n   * Element.undrag\n   [ method ]\n   **\n   * Removes all drag event handlers from the given element\n  \\*/\n\n\n  elproto.undrag = function () {\n    var i = draggable.length;\n\n    while (i--) {\n      if (draggable[i].el == this) {\n        this.unmousedown(draggable[i].init);\n        draggable.splice(i, 1);\n        eve.unbind(\"snap.drag.*.\" + this.id);\n        eve.unbind(\"snap.draginit.\" + this.id);\n      }\n    }\n\n    !draggable.length && Snap.unmousemove(dragMove).unmouseup(dragUp);\n    return this;\n  };\n}); // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nSnap.plugin(function (Snap, Element, Paper, glob) {\n  var elproto = Element.prototype,\n      pproto = Paper.prototype,\n      rgurl = /^\\s*url\\((.+)\\)/,\n      Str = String,\n      $ = Snap._.$;\n  Snap.filter = {};\n  /*\\\n   * Paper.filter\n   [ method ]\n   **\n   * Creates a `<filter>` element\n   **\n   - filstr (string) SVG fragment of filter provided as a string\n   = (object) @Element\n   * Note: It is recommended to use filters embedded into the page inside an empty SVG element.\n   > Usage\n   | var f = paper.filter('<feGaussianBlur stdDeviation=\"2\"/>'),\n   |     c = paper.circle(10, 10, 10).attr({\n   |         filter: f\n   |     });\n  \\*/\n\n  pproto.filter = function (filstr) {\n    var paper = this;\n\n    if (paper.type != \"svg\") {\n      paper = paper.paper;\n    }\n\n    var f = Snap.parse(Str(filstr)),\n        id = Snap._.id(),\n        width = paper.node.offsetWidth,\n        height = paper.node.offsetHeight,\n        filter = $(\"filter\");\n\n    $(filter, {\n      id: id,\n      filterUnits: \"userSpaceOnUse\"\n    });\n    filter.appendChild(f.node);\n    paper.defs.appendChild(filter);\n    return new Element(filter);\n  };\n\n  eve.on(\"snap.util.getattr.filter\", function () {\n    eve.stop();\n    var p = $(this.node, \"filter\");\n\n    if (p) {\n      var match = Str(p).match(rgurl);\n      return match && Snap.select(match[1]);\n    }\n  });\n  eve.on(\"snap.util.attr.filter\", function (value) {\n    if (value instanceof Element && value.type == \"filter\") {\n      eve.stop();\n      var id = value.node.id;\n\n      if (!id) {\n        $(value.node, {\n          id: value.id\n        });\n        id = value.id;\n      }\n\n      $(this.node, {\n        filter: Snap.url(id)\n      });\n    }\n\n    if (!value || value == \"none\") {\n      eve.stop();\n      this.node.removeAttribute(\"filter\");\n    }\n  });\n  /*\\\n   * Snap.filter.blur\n   [ method ]\n   **\n   * Returns an SVG markup string for the blur filter\n   **\n   - x (number) amount of horizontal blur, in pixels\n   - y (number) #optional amount of vertical blur, in pixels\n   = (string) filter representation\n   > Usage\n   | var f = paper.filter(Snap.filter.blur(5, 10)),\n   |     c = paper.circle(10, 10, 10).attr({\n   |         filter: f\n   |     });\n  \\*/\n\n  Snap.filter.blur = function (x, y) {\n    if (x == null) {\n      x = 2;\n    }\n\n    var def = y == null ? x : [x, y];\n    return Snap.format('\\<feGaussianBlur stdDeviation=\"{def}\"/>', {\n      def: def\n    });\n  };\n\n  Snap.filter.blur.toString = function () {\n    return this();\n  };\n  /*\\\n   * Snap.filter.shadow\n   [ method ]\n   **\n   * Returns an SVG markup string for the shadow filter\n   **\n   - dx (number) #optional horizontal shift of the shadow, in pixels\n   - dy (number) #optional vertical shift of the shadow, in pixels\n   - blur (number) #optional amount of blur\n   - color (string) #optional color of the shadow\n   - opacity (number) #optional `0..1` opacity of the shadow\n   * or\n   - dx (number) #optional horizontal shift of the shadow, in pixels\n   - dy (number) #optional vertical shift of the shadow, in pixels\n   - color (string) #optional color of the shadow\n   - opacity (number) #optional `0..1` opacity of the shadow\n   * which makes blur default to `4`. Or\n   - dx (number) #optional horizontal shift of the shadow, in pixels\n   - dy (number) #optional vertical shift of the shadow, in pixels\n   - opacity (number) #optional `0..1` opacity of the shadow\n   = (string) filter representation\n   > Usage\n   | var f = paper.filter(Snap.filter.shadow(0, 2, .3)),\n   |     c = paper.circle(10, 10, 10).attr({\n   |         filter: f\n   |     });\n  \\*/\n\n\n  Snap.filter.shadow = function (dx, dy, blur, color, opacity) {\n    if (opacity == null) {\n      if (color == null) {\n        opacity = blur;\n        blur = 4;\n        color = \"#000\";\n      } else {\n        opacity = color;\n        color = blur;\n        blur = 4;\n      }\n    }\n\n    if (blur == null) {\n      blur = 4;\n    }\n\n    if (opacity == null) {\n      opacity = 1;\n    }\n\n    if (dx == null) {\n      dx = 0;\n      dy = 2;\n    }\n\n    if (dy == null) {\n      dy = dx;\n    }\n\n    color = Snap.color(color);\n    return Snap.format('<feGaussianBlur in=\"SourceAlpha\" stdDeviation=\"{blur}\"/><feOffset dx=\"{dx}\" dy=\"{dy}\" result=\"offsetblur\"/><feFlood flood-color=\"{color}\"/><feComposite in2=\"offsetblur\" operator=\"in\"/><feComponentTransfer><feFuncA type=\"linear\" slope=\"{opacity}\"/></feComponentTransfer><feMerge><feMergeNode/><feMergeNode in=\"SourceGraphic\"/></feMerge>', {\n      color: color,\n      dx: dx,\n      dy: dy,\n      blur: blur,\n      opacity: opacity\n    });\n  };\n\n  Snap.filter.shadow.toString = function () {\n    return this();\n  };\n  /*\\\n   * Snap.filter.grayscale\n   [ method ]\n   **\n   * Returns an SVG markup string for the grayscale filter\n   **\n   - amount (number) amount of filter (`0..1`)\n   = (string) filter representation\n  \\*/\n\n\n  Snap.filter.grayscale = function (amount) {\n    if (amount == null) {\n      amount = 1;\n    }\n\n    return Snap.format('<feColorMatrix type=\"matrix\" values=\"{a} {b} {c} 0 0 {d} {e} {f} 0 0 {g} {b} {h} 0 0 0 0 0 1 0\"/>', {\n      a: 0.2126 + 0.7874 * (1 - amount),\n      b: 0.7152 - 0.7152 * (1 - amount),\n      c: 0.0722 - 0.0722 * (1 - amount),\n      d: 0.2126 - 0.2126 * (1 - amount),\n      e: 0.7152 + 0.2848 * (1 - amount),\n      f: 0.0722 - 0.0722 * (1 - amount),\n      g: 0.2126 - 0.2126 * (1 - amount),\n      h: 0.0722 + 0.9278 * (1 - amount)\n    });\n  };\n\n  Snap.filter.grayscale.toString = function () {\n    return this();\n  };\n  /*\\\n   * Snap.filter.sepia\n   [ method ]\n   **\n   * Returns an SVG markup string for the sepia filter\n   **\n   - amount (number) amount of filter (`0..1`)\n   = (string) filter representation\n  \\*/\n\n\n  Snap.filter.sepia = function (amount) {\n    if (amount == null) {\n      amount = 1;\n    }\n\n    return Snap.format('<feColorMatrix type=\"matrix\" values=\"{a} {b} {c} 0 0 {d} {e} {f} 0 0 {g} {h} {i} 0 0 0 0 0 1 0\"/>', {\n      a: 0.393 + 0.607 * (1 - amount),\n      b: 0.769 - 0.769 * (1 - amount),\n      c: 0.189 - 0.189 * (1 - amount),\n      d: 0.349 - 0.349 * (1 - amount),\n      e: 0.686 + 0.314 * (1 - amount),\n      f: 0.168 - 0.168 * (1 - amount),\n      g: 0.272 - 0.272 * (1 - amount),\n      h: 0.534 - 0.534 * (1 - amount),\n      i: 0.131 + 0.869 * (1 - amount)\n    });\n  };\n\n  Snap.filter.sepia.toString = function () {\n    return this();\n  };\n  /*\\\n   * Snap.filter.saturate\n   [ method ]\n   **\n   * Returns an SVG markup string for the saturate filter\n   **\n   - amount (number) amount of filter (`0..1`)\n   = (string) filter representation\n  \\*/\n\n\n  Snap.filter.saturate = function (amount) {\n    if (amount == null) {\n      amount = 1;\n    }\n\n    return Snap.format('<feColorMatrix type=\"saturate\" values=\"{amount}\"/>', {\n      amount: 1 - amount\n    });\n  };\n\n  Snap.filter.saturate.toString = function () {\n    return this();\n  };\n  /*\\\n   * Snap.filter.hueRotate\n   [ method ]\n   **\n   * Returns an SVG markup string for the hue-rotate filter\n   **\n   - angle (number) angle of rotation\n   = (string) filter representation\n  \\*/\n\n\n  Snap.filter.hueRotate = function (angle) {\n    angle = angle || 0;\n    return Snap.format('<feColorMatrix type=\"hueRotate\" values=\"{angle}\"/>', {\n      angle: angle\n    });\n  };\n\n  Snap.filter.hueRotate.toString = function () {\n    return this();\n  };\n  /*\\\n   * Snap.filter.invert\n   [ method ]\n   **\n   * Returns an SVG markup string for the invert filter\n   **\n   - amount (number) amount of filter (`0..1`)\n   = (string) filter representation\n  \\*/\n\n\n  Snap.filter.invert = function (amount) {\n    if (amount == null) {\n      amount = 1;\n    } //        <feColorMatrix type=\"matrix\" values=\"-1 0 0 0 1  0 -1 0 0 1  0 0 -1 0 1  0 0 0 1 0\" color-interpolation-filters=\"sRGB\"/>\n\n\n    return Snap.format('<feComponentTransfer><feFuncR type=\"table\" tableValues=\"{amount} {amount2}\"/><feFuncG type=\"table\" tableValues=\"{amount} {amount2}\"/><feFuncB type=\"table\" tableValues=\"{amount} {amount2}\"/></feComponentTransfer>', {\n      amount: amount,\n      amount2: 1 - amount\n    });\n  };\n\n  Snap.filter.invert.toString = function () {\n    return this();\n  };\n  /*\\\n   * Snap.filter.brightness\n   [ method ]\n   **\n   * Returns an SVG markup string for the brightness filter\n   **\n   - amount (number) amount of filter (`0..1`)\n   = (string) filter representation\n  \\*/\n\n\n  Snap.filter.brightness = function (amount) {\n    if (amount == null) {\n      amount = 1;\n    }\n\n    return Snap.format('<feComponentTransfer><feFuncR type=\"linear\" slope=\"{amount}\"/><feFuncG type=\"linear\" slope=\"{amount}\"/><feFuncB type=\"linear\" slope=\"{amount}\"/></feComponentTransfer>', {\n      amount: amount\n    });\n  };\n\n  Snap.filter.brightness.toString = function () {\n    return this();\n  };\n  /*\\\n   * Snap.filter.contrast\n   [ method ]\n   **\n   * Returns an SVG markup string for the contrast filter\n   **\n   - amount (number) amount of filter (`0..1`)\n   = (string) filter representation\n  \\*/\n\n\n  Snap.filter.contrast = function (amount) {\n    if (amount == null) {\n      amount = 1;\n    }\n\n    return Snap.format('<feComponentTransfer><feFuncR type=\"linear\" slope=\"{amount}\" intercept=\"{amount2}\"/><feFuncG type=\"linear\" slope=\"{amount}\" intercept=\"{amount2}\"/><feFuncB type=\"linear\" slope=\"{amount}\" intercept=\"{amount2}\"/></feComponentTransfer>', {\n      amount: amount,\n      amount2: .5 - amount / 2\n    });\n  };\n\n  Snap.filter.contrast.toString = function () {\n    return this();\n  };\n}); // Copyright (c) 2014 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nSnap.plugin(function (Snap, Element, Paper, glob, Fragment) {\n  var box = Snap._.box,\n      is = Snap.is,\n      firstLetter = /^[^a-z]*([tbmlrc])/i,\n      toString = function toString() {\n    return \"T\" + this.dx + \",\" + this.dy;\n  };\n  /*\\\n   * Element.getAlign\n   [ method ]\n   **\n   * Returns shift needed to align the element relatively to given element.\n   * If no elements specified, parent `<svg>` container will be used.\n   - el (object) @optional alignment element\n   - way (string) one of six values: `\"top\"`, `\"middle\"`, `\"bottom\"`, `\"left\"`, `\"center\"`, `\"right\"`\n   = (object|string) Object in format `{dx: , dy: }` also has a string representation as a transformation string\n   > Usage\n   | el.transform(el.getAlign(el2, \"top\"));\n   * or\n   | var dy = el.getAlign(el2, \"top\").dy;\n  \\*/\n\n\n  Element.prototype.getAlign = function (el, way) {\n    if (way == null && is(el, \"string\")) {\n      way = el;\n      el = null;\n    }\n\n    el = el || this.paper;\n    var bx = el.getBBox ? el.getBBox() : box(el),\n        bb = this.getBBox(),\n        out = {};\n    way = way && way.match(firstLetter);\n    way = way ? way[1].toLowerCase() : \"c\";\n\n    switch (way) {\n      case \"t\":\n        out.dx = 0;\n        out.dy = bx.y - bb.y;\n        break;\n\n      case \"b\":\n        out.dx = 0;\n        out.dy = bx.y2 - bb.y2;\n        break;\n\n      case \"m\":\n        out.dx = 0;\n        out.dy = bx.cy - bb.cy;\n        break;\n\n      case \"l\":\n        out.dx = bx.x - bb.x;\n        out.dy = 0;\n        break;\n\n      case \"r\":\n        out.dx = bx.x2 - bb.x2;\n        out.dy = 0;\n        break;\n\n      default:\n        out.dx = bx.cx - bb.cx;\n        out.dy = 0;\n        break;\n    }\n\n    out.toString = toString;\n    return out;\n  };\n  /*\\\n   * Element.align\n   [ method ]\n   **\n   * Aligns the element relatively to given one via transformation.\n   * If no elements specified, parent `<svg>` container will be used.\n   - el (object) @optional alignment element\n   - way (string) one of six values: `\"top\"`, `\"middle\"`, `\"bottom\"`, `\"left\"`, `\"center\"`, `\"right\"`\n   = (object) this element\n   > Usage\n   | el.align(el2, \"top\");\n   * or\n   | el.align(\"middle\");\n  \\*/\n\n\n  Element.prototype.align = function (el, way) {\n    return this.transform(\"...\" + this.getAlign(el, way));\n  };\n}); // Copyright (c) 2016 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nSnap.plugin(function (Snap, Element, Paper, glob, Fragment) {\n  var elproto = Element.prototype,\n      is = Snap.is,\n      Str = String,\n      has = \"hasOwnProperty\";\n\n  function slice(from, to, f) {\n    return function (arr) {\n      var res = arr.slice(from, to);\n\n      if (res.length == 1) {\n        res = res[0];\n      }\n\n      return f ? f(res) : res;\n    };\n  }\n\n  var Animation = function Animation(attr, ms, easing, callback) {\n    if (typeof easing == \"function\" && !easing.length) {\n      callback = easing;\n      easing = mina.linear;\n    }\n\n    this.attr = attr;\n    this.dur = ms;\n    easing && (this.easing = easing);\n    callback && (this.callback = callback);\n  };\n\n  Snap._.Animation = Animation;\n  /*\\\n   * Snap.animation\n   [ method ]\n   **\n   * Creates an animation object\n   **\n   - attr (object) attributes of final destination\n   - duration (number) duration of the animation, in milliseconds\n   - easing (function) #optional one of easing functions of @mina or custom one\n   - callback (function) #optional callback function that fires when animation ends\n   = (object) animation object\n  \\*/\n\n  Snap.animation = function (attr, ms, easing, callback) {\n    return new Animation(attr, ms, easing, callback);\n  };\n  /*\\\n   * Element.inAnim\n   [ method ]\n   **\n   * Returns a set of animations that may be able to manipulate the current element\n   **\n   = (object) in format:\n   o {\n   o     anim (object) animation object,\n   o     mina (object) @mina object,\n   o     curStatus (number) 0..1 — status of the animation: 0 — just started, 1 — just finished,\n   o     status (function) gets or sets the status of the animation,\n   o     stop (function) stops the animation\n   o }\n  \\*/\n\n\n  elproto.inAnim = function () {\n    var el = this,\n        res = [];\n\n    for (var id in el.anims) {\n      if (el.anims[has](id)) {\n        (function (a) {\n          res.push({\n            anim: new Animation(a._attrs, a.dur, a.easing, a._callback),\n            mina: a,\n            curStatus: a.status(),\n            status: function status(val) {\n              return a.status(val);\n            },\n            stop: function stop() {\n              a.stop();\n            }\n          });\n        })(el.anims[id]);\n      }\n    }\n\n    return res;\n  };\n  /*\\\n   * Snap.animate\n   [ method ]\n   **\n   * Runs generic animation of one number into another with a caring function\n   **\n   - from (number|array) number or array of numbers\n   - to (number|array) number or array of numbers\n   - setter (function) caring function that accepts one number argument\n   - duration (number) duration, in milliseconds\n   - easing (function) #optional easing function from @mina or custom\n   - callback (function) #optional callback function to execute when animation ends\n   = (object) animation object in @mina format\n   o {\n   o     id (string) animation id, consider it read-only,\n   o     duration (function) gets or sets the duration of the animation,\n   o     easing (function) easing,\n   o     speed (function) gets or sets the speed of the animation,\n   o     status (function) gets or sets the status of the animation,\n   o     stop (function) stops the animation\n   o }\n   | var rect = Snap().rect(0, 0, 10, 10);\n   | Snap.animate(0, 10, function (val) {\n   |     rect.attr({\n   |         x: val\n   |     });\n   | }, 1000);\n   | // in given context is equivalent to\n   | rect.animate({x: 10}, 1000);\n  \\*/\n\n\n  Snap.animate = function (from, to, setter, ms, easing, callback) {\n    if (typeof easing == \"function\" && !easing.length) {\n      callback = easing;\n      easing = mina.linear;\n    }\n\n    var now = mina.time(),\n        anim = mina(from, to, now, now + ms, mina.time, setter, easing);\n    callback && eve.once(\"mina.finish.\" + anim.id, callback);\n    return anim;\n  };\n  /*\\\n   * Element.stop\n   [ method ]\n   **\n   * Stops all the animations for the current element\n   **\n   = (Element) the current element\n  \\*/\n\n\n  elproto.stop = function () {\n    var anims = this.inAnim();\n\n    for (var i = 0, ii = anims.length; i < ii; i++) {\n      anims[i].stop();\n    }\n\n    return this;\n  };\n  /*\\\n   * Element.animate\n   [ method ]\n   **\n   * Animates the given attributes of the element\n   **\n   - attrs (object) key-value pairs of destination attributes\n   - duration (number) duration of the animation in milliseconds\n   - easing (function) #optional easing function from @mina or custom\n   - callback (function) #optional callback function that executes when the animation ends\n   = (Element) the current element\n  \\*/\n\n\n  elproto.animate = function (attrs, ms, easing, callback) {\n    if (typeof easing == \"function\" && !easing.length) {\n      callback = easing;\n      easing = mina.linear;\n    }\n\n    if (attrs instanceof Animation) {\n      callback = attrs.callback;\n      easing = attrs.easing;\n      ms = attrs.dur;\n      attrs = attrs.attr;\n    }\n\n    var fkeys = [],\n        tkeys = [],\n        keys = {},\n        from,\n        to,\n        f,\n        eq,\n        el = this;\n\n    for (var key in attrs) {\n      if (attrs[has](key)) {\n        if (el.equal) {\n          eq = el.equal(key, Str(attrs[key]));\n          from = eq.from;\n          to = eq.to;\n          f = eq.f;\n        } else {\n          from = +el.attr(key);\n          to = +attrs[key];\n        }\n\n        var len = is(from, \"array\") ? from.length : 1;\n        keys[key] = slice(fkeys.length, fkeys.length + len, f);\n        fkeys = fkeys.concat(from);\n        tkeys = tkeys.concat(to);\n      }\n    }\n\n    var now = mina.time(),\n        anim = mina(fkeys, tkeys, now, now + ms, mina.time, function (val) {\n      var attr = {};\n\n      for (var key in keys) {\n        if (keys[has](key)) {\n          attr[key] = keys[key](val);\n        }\n      }\n\n      el.attr(attr);\n    }, easing);\n    el.anims[anim.id] = anim;\n    anim._attrs = attrs;\n    anim._callback = callback;\n    eve(\"snap.animcreated.\" + el.id, anim);\n    eve.once(\"mina.finish.\" + anim.id, function () {\n      eve.off(\"mina.*.\" + anim.id);\n      delete el.anims[anim.id];\n      callback && callback.call(el);\n    });\n    eve.once(\"mina.stop.\" + anim.id, function () {\n      eve.off(\"mina.*.\" + anim.id);\n      delete el.anims[anim.id];\n    });\n    return el;\n  };\n}); // Copyright (c) 2017 Adobe Systems Incorporated. All rights reserved.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nSnap.plugin(function (Snap, Element, Paper, glob) {\n  // Colours are from https://www.materialui.co\n  var red = \"#ffebee#ffcdd2#ef9a9a#e57373#ef5350#f44336#e53935#d32f2f#c62828#b71c1c#ff8a80#ff5252#ff1744#d50000\",\n      pink = \"#FCE4EC#F8BBD0#F48FB1#F06292#EC407A#E91E63#D81B60#C2185B#AD1457#880E4F#FF80AB#FF4081#F50057#C51162\",\n      purple = \"#F3E5F5#E1BEE7#CE93D8#BA68C8#AB47BC#9C27B0#8E24AA#7B1FA2#6A1B9A#4A148C#EA80FC#E040FB#D500F9#AA00FF\",\n      deeppurple = \"#EDE7F6#D1C4E9#B39DDB#9575CD#7E57C2#673AB7#5E35B1#512DA8#4527A0#311B92#B388FF#7C4DFF#651FFF#6200EA\",\n      indigo = \"#E8EAF6#C5CAE9#9FA8DA#7986CB#5C6BC0#3F51B5#3949AB#303F9F#283593#1A237E#8C9EFF#536DFE#3D5AFE#304FFE\",\n      blue = \"#E3F2FD#BBDEFB#90CAF9#64B5F6#64B5F6#2196F3#1E88E5#1976D2#1565C0#0D47A1#82B1FF#448AFF#2979FF#2962FF\",\n      lightblue = \"#E1F5FE#B3E5FC#81D4FA#4FC3F7#29B6F6#03A9F4#039BE5#0288D1#0277BD#01579B#80D8FF#40C4FF#00B0FF#0091EA\",\n      cyan = \"#E0F7FA#B2EBF2#80DEEA#4DD0E1#26C6DA#00BCD4#00ACC1#0097A7#00838F#006064#84FFFF#18FFFF#00E5FF#00B8D4\",\n      teal = \"#E0F2F1#B2DFDB#80CBC4#4DB6AC#26A69A#009688#00897B#00796B#00695C#004D40#A7FFEB#64FFDA#1DE9B6#00BFA5\",\n      green = \"#E8F5E9#C8E6C9#A5D6A7#81C784#66BB6A#4CAF50#43A047#388E3C#2E7D32#1B5E20#B9F6CA#69F0AE#00E676#00C853\",\n      lightgreen = \"#F1F8E9#DCEDC8#C5E1A5#AED581#9CCC65#8BC34A#7CB342#689F38#558B2F#33691E#CCFF90#B2FF59#76FF03#64DD17\",\n      lime = \"#F9FBE7#F0F4C3#E6EE9C#DCE775#D4E157#CDDC39#C0CA33#AFB42B#9E9D24#827717#F4FF81#EEFF41#C6FF00#AEEA00\",\n      yellow = \"#FFFDE7#FFF9C4#FFF59D#FFF176#FFEE58#FFEB3B#FDD835#FBC02D#F9A825#F57F17#FFFF8D#FFFF00#FFEA00#FFD600\",\n      amber = \"#FFF8E1#FFECB3#FFE082#FFD54F#FFCA28#FFC107#FFB300#FFA000#FF8F00#FF6F00#FFE57F#FFD740#FFC400#FFAB00\",\n      orange = \"#FFF3E0#FFE0B2#FFCC80#FFB74D#FFA726#FF9800#FB8C00#F57C00#EF6C00#E65100#FFD180#FFAB40#FF9100#FF6D00\",\n      deeporange = \"#FBE9E7#FFCCBC#FFAB91#FF8A65#FF7043#FF5722#F4511E#E64A19#D84315#BF360C#FF9E80#FF6E40#FF3D00#DD2C00\",\n      brown = \"#EFEBE9#D7CCC8#BCAAA4#A1887F#8D6E63#795548#6D4C41#5D4037#4E342E#3E2723\",\n      grey = \"#FAFAFA#F5F5F5#EEEEEE#E0E0E0#BDBDBD#9E9E9E#757575#616161#424242#212121\",\n      bluegrey = \"#ECEFF1#CFD8DC#B0BEC5#90A4AE#78909C#607D8B#546E7A#455A64#37474F#263238\";\n  /*\\\n   * Snap.mui\n   [ property ]\n   **\n   * Contain Material UI colours.\n   | Snap().rect(0, 0, 10, 10).attr({fill: Snap.mui.deeppurple, stroke: Snap.mui.amber[600]});\n   # For colour reference: <a href=\"https://www.materialui.co\">https://www.materialui.co</a>.\n  \\*/\n\n  Snap.mui = {};\n  /*\\\n   * Snap.flat\n   [ property ]\n   **\n   * Contain Flat UI colours.\n   | Snap().rect(0, 0, 10, 10).attr({fill: Snap.flat.carrot, stroke: Snap.flat.wetasphalt});\n   # For colour reference: <a href=\"https://www.materialui.co\">https://www.materialui.co</a>.\n  \\*/\n\n  Snap.flat = {};\n\n  function saveColor(colors) {\n    colors = colors.split(/(?=#)/);\n    var color = new String(colors[5]);\n    color[50] = colors[0];\n    color[100] = colors[1];\n    color[200] = colors[2];\n    color[300] = colors[3];\n    color[400] = colors[4];\n    color[500] = colors[5];\n    color[600] = colors[6];\n    color[700] = colors[7];\n    color[800] = colors[8];\n    color[900] = colors[9];\n\n    if (colors[10]) {\n      color.A100 = colors[10];\n      color.A200 = colors[11];\n      color.A400 = colors[12];\n      color.A700 = colors[13];\n    }\n\n    return color;\n  }\n\n  Snap.mui.red = saveColor(red);\n  Snap.mui.pink = saveColor(pink);\n  Snap.mui.purple = saveColor(purple);\n  Snap.mui.deeppurple = saveColor(deeppurple);\n  Snap.mui.indigo = saveColor(indigo);\n  Snap.mui.blue = saveColor(blue);\n  Snap.mui.lightblue = saveColor(lightblue);\n  Snap.mui.cyan = saveColor(cyan);\n  Snap.mui.teal = saveColor(teal);\n  Snap.mui.green = saveColor(green);\n  Snap.mui.lightgreen = saveColor(lightgreen);\n  Snap.mui.lime = saveColor(lime);\n  Snap.mui.yellow = saveColor(yellow);\n  Snap.mui.amber = saveColor(amber);\n  Snap.mui.orange = saveColor(orange);\n  Snap.mui.deeporange = saveColor(deeporange);\n  Snap.mui.brown = saveColor(brown);\n  Snap.mui.grey = saveColor(grey);\n  Snap.mui.bluegrey = saveColor(bluegrey);\n  Snap.flat.turquoise = \"#1abc9c\";\n  Snap.flat.greensea = \"#16a085\";\n  Snap.flat.sunflower = \"#f1c40f\";\n  Snap.flat.orange = \"#f39c12\";\n  Snap.flat.emerland = \"#2ecc71\";\n  Snap.flat.nephritis = \"#27ae60\";\n  Snap.flat.carrot = \"#e67e22\";\n  Snap.flat.pumpkin = \"#d35400\";\n  Snap.flat.peterriver = \"#3498db\";\n  Snap.flat.belizehole = \"#2980b9\";\n  Snap.flat.alizarin = \"#e74c3c\";\n  Snap.flat.pomegranate = \"#c0392b\";\n  Snap.flat.amethyst = \"#9b59b6\";\n  Snap.flat.wisteria = \"#8e44ad\";\n  Snap.flat.clouds = \"#ecf0f1\";\n  Snap.flat.silver = \"#bdc3c7\";\n  Snap.flat.wetasphalt = \"#34495e\";\n  Snap.flat.midnightblue = \"#2c3e50\";\n  Snap.flat.concrete = \"#95a5a6\";\n  Snap.flat.asbestos = \"#7f8c8d\";\n  /*\\\n   * Snap.importMUIColors\n   [ method ]\n   **\n   * Imports Material UI colours into global object.\n   | Snap.importMUIColors();\n   | Snap().rect(0, 0, 10, 10).attr({fill: deeppurple, stroke: amber[600]});\n   # For colour reference: <a href=\"https://www.materialui.co\">https://www.materialui.co</a>.\n  \\*/\n\n  Snap.importMUIColors = function () {\n    for (var color in Snap.mui) {\n      if (Snap.mui.hasOwnProperty(color)) {\n        window[color] = Snap.mui[color];\n      }\n    }\n  };\n});\nmodule.exports = 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