text: // Snap.svg 0.4.0
  // 
  // Copyright (c) 2013 – 2015 Adobe Systems Incorporated. All rights reserved.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // 
  // http://www.apache.org/licenses/LICENSE-2.0
  // 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  // 
  // build: 2015-04-07
  
  // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // 
  // http://www.apache.org/licenses/LICENSE-2.0
  // 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  // ┌────────────────────────────────────────────────────────────┐ \\
  // │ Eve 0.4.2 - JavaScript Events Library                      │ \\
  // ├────────────────────────────────────────────────────────────┤ \\
  // │ Author Dmitry Baranovskiy (http://dmitry.baranovskiy.com/) │ \\
  // └────────────────────────────────────────────────────────────┘ \\
  
  (function (glob) {
      var version = "0.4.2",
          has = "hasOwnProperty",
          separator = /[\.\/]/,
          comaseparator = /\s*,\s*/,
          wildcard = "*",
          fun = function () {},
          numsort = function (a, b) {
              return a - b;
          },
          current_event,
          stop,
          events = {n: {}},
          firstDefined = function () {
              for (var i = 0, ii = this.length; i < ii; i++) {
                  if (typeof this[i] != "undefined") {
                      return this[i];
                  }
              }
          },
          lastDefined = function () {
              var i = this.length;
              while (--i) {
                  if (typeof this[i] != "undefined") {
                      return this[i];
                  }
              }
          },
      /*\
       * eve
       [ method ]
  
       * Fires event with given `name`, given scope and other parameters.
  
       > Arguments
  
       - name (string) name of the *event*, dot (`.`) or slash (`/`) separated
       - scope (object) context for the event handlers
       - varargs (...) the rest of arguments will be sent to event handlers
  
       = (object) array of returned values from the listeners. Array has two methods `.firstDefined()` and `.lastDefined()` to get first or last not `undefined` value.
      \*/
          eve = function (name, scope) {
              name = String(name);
              var e = events,
                  oldstop = stop,
                  args = Array.prototype.slice.call(arguments, 2),
                  listeners = eve.listeners(name),
                  z = 0,
                  f = false,
                  l,
                  indexed = [],
                  queue = {},
                  out = [],
                  ce = current_event,
                  errors = [];
              out.firstDefined = firstDefined;
              out.lastDefined = lastDefined;
              current_event = name;
              stop = 0;
              for (var i = 0, ii = listeners.length; i < ii; i++) if ("zIndex" in listeners[i]) {
                  indexed.push(listeners[i].zIndex);
                  if (listeners[i].zIndex < 0) {
                      queue[listeners[i].zIndex] = listeners[i];
                  }
              }
              indexed.sort(numsort);
              while (indexed[z] < 0) {
                  l = queue[indexed[z++]];
                  out.push(l.apply(scope, args));
                  if (stop) {
                      stop = oldstop;
                      return out;
                  }
              }
              for (i = 0; i < ii; i++) {
                  l = listeners[i];
                  if ("zIndex" in l) {
                      if (l.zIndex == indexed[z]) {
                          out.push(l.apply(scope, args));
                          if (stop) {
                              break;
                          }
                          do {
                              z++;
                              l = queue[indexed[z]];
                              l && out.push(l.apply(scope, args));
                              if (stop) {
                                  break;
                              }
                          } while (l)
                      } else {
                          queue[l.zIndex] = l;
                      }
                  } else {
                      out.push(l.apply(scope, args));
                      if (stop) {
                          break;
                      }
                  }
              }
              stop = oldstop;
              current_event = ce;
              return out;
          };
          // Undocumented. Debug only.
          eve._events = events;
      /*\
       * eve.listeners
       [ method ]
  
       * Internal method which gives you array of all event handlers that will be triggered by the given `name`.
  
       > Arguments
  
       - name (string) name of the event, dot (`.`) or slash (`/`) separated
  
       = (array) array of event handlers
      \*/
      eve.listeners = function (name) {
          var names = name.split(separator),
              e = events,
              item,
              items,
              k,
              i,
              ii,
              j,
              jj,
              nes,
              es = [e],
              out = [];
          for (i = 0, ii = names.length; i < ii; i++) {
              nes = [];
              for (j = 0, jj = es.length; j < jj; j++) {
                  e = es[j].n;
                  items = [e[names[i]], e[wildcard]];
                  k = 2;
                  while (k--) {
                      item = items[k];
                      if (item) {
                          nes.push(item);
                          out = out.concat(item.f || []);
                      }
                  }
              }
              es = nes;
          }
          return out;
      };
      
      /*\
       * eve.on
       [ method ]
       **
       * Binds given event handler with a given name. You can use wildcards “`*`” for the names:
       | eve.on("*.under.*", f);
       | eve("mouse.under.floor"); // triggers f
       * Use @eve to trigger the listener.
       **
       > Arguments
       **
       - name (string) name of the event, dot (`.`) or slash (`/`) separated, with optional wildcards
       - f (function) event handler function
       **
       = (function) returned function accepts a single numeric parameter that represents z-index of the handler. It is an optional feature and only used when you need to ensure that some subset of handlers will be invoked in a given order, despite of the order of assignment. 
       > Example:
       | eve.on("mouse", eatIt)(2);
       | eve.on("mouse", scream);
       | eve.on("mouse", catchIt)(1);
       * This will ensure that `catchIt` function will be called before `eatIt`.
       *
       * If you want to put your handler before non-indexed handlers, specify a negative value.
       * Note: I assume most of the time you don’t need to worry about z-index, but it’s nice to have this feature “just in case”.
      \*/
      eve.on = function (name, f) {
          name = String(name);
          if (typeof f != "function") {
              return function () {};
          }
          var names = name.split(comaseparator);
          for (var i = 0, ii = names.length; i < ii; i++) {
              (function (name) {
                  var names = name.split(separator),
                      e = events,
                      exist;
                  for (var i = 0, ii = names.length; i < ii; i++) {
                      e = e.n;
                      e = e.hasOwnProperty(names[i]) && e[names[i]] || (e[names[i]] = {n: {}});
                  }
                  e.f = e.f || [];
                  for (i = 0, ii = e.f.length; i < ii; i++) if (e.f[i] == f) {
                      exist = true;
                      break;
                  }
                  !exist && e.f.push(f);
              }(names[i]));
          }
          return function (zIndex) {
              if (+zIndex == +zIndex) {
                  f.zIndex = +zIndex;
              }
          };
      };
      /*\
       * eve.f
       [ method ]
       **
       * Returns function that will fire given event with optional arguments.
       * Arguments that will be passed to the result function will be also
       * concated to the list of final arguments.
       | el.onclick = eve.f("click", 1, 2);
       | eve.on("click", function (a, b, c) {
       |     console.log(a, b, c); // 1, 2, [event object]
       | });
       > Arguments
       - event (string) event name
       - varargs (…) and any other arguments
       = (function) possible event handler function
      \*/
      eve.f = function (event) {
          var attrs = [].slice.call(arguments, 1);
          return function () {
              eve.apply(null, [event, null].concat(attrs).concat([].slice.call(arguments, 0)));
          };
      };
      /*\
       * eve.stop
       [ method ]
       **
       * Is used inside an event handler to stop the event, preventing any subsequent listeners from firing.
      \*/
      eve.stop = function () {
          stop = 1;
      };
      /*\
       * eve.nt
       [ method ]
       **
       * Could be used inside event handler to figure out actual name of the event.
       **
       > Arguments
       **
       - subname (string) #optional subname of the event
       **
       = (string) name of the event, if `subname` is not specified
       * or
       = (boolean) `true`, if current event’s name contains `subname`
      \*/
      eve.nt = function (subname) {
          if (subname) {
              return new RegExp("(?:\\.|\\/|^)" + subname + "(?:\\.|\\/|$)").test(current_event);
          }
          return current_event;
      };
      /*\
       * eve.nts
       [ method ]
       **
       * Could be used inside event handler to figure out actual name of the event.
       **
       **
       = (array) names of the event
      \*/
      eve.nts = function () {
          return current_event.split(separator);
      };
      /*\
       * eve.off
       [ method ]
       **
       * Removes given function from the list of event listeners assigned to given name.
       * If no arguments specified all the events will be cleared.
       **
       > Arguments
       **
       - name (string) name of the event, dot (`.`) or slash (`/`) separated, with optional wildcards
       - f (function) event handler function
      \*/
      /*\
       * eve.unbind
       [ method ]
       **
       * See @eve.off
      \*/
      eve.off = eve.unbind = function (name, f) {
          if (!name) {
              eve._events = events = {n: {}};
              return;
          }
          var names = name.split(comaseparator);
          if (names.length > 1) {
              for (var i = 0, ii = names.length; i < ii; i++) {
                  eve.off(names[i], f);
              }
              return;
          }
          names = name.split(separator);
          var e,
              key,
              splice,
              i, ii, j, jj,
              cur = [events];
          for (i = 0, ii = names.length; i < ii; i++) {
              for (j = 0; j < cur.length; j += splice.length - 2) {
                  splice = [j, 1];
                  e = cur[j].n;
                  if (names[i] != wildcard) {
                      if (e[names[i]]) {
                          splice.push(e[names[i]]);
                      }
                  } else {
                      for (key in e) if (e[has](key)) {
                          splice.push(e[key]);
                      }
                  }
                  cur.splice.apply(cur, splice);
              }
          }
          for (i = 0, ii = cur.length; i < ii; i++) {
              e = cur[i];
              while (e.n) {
                  if (f) {
                      if (e.f) {
                          for (j = 0, jj = e.f.length; j < jj; j++) if (e.f[j] == f) {
                              e.f.splice(j, 1);
                              break;
                          }
                          !e.f.length && delete e.f;
                      }
                      for (key in e.n) if (e.n[has](key) && e.n[key].f) {
                          var funcs = e.n[key].f;
                          for (j = 0, jj = funcs.length; j < jj; j++) if (funcs[j] == f) {
                              funcs.splice(j, 1);
                              break;
                          }
                          !funcs.length && delete e.n[key].f;
                      }
                  } else {
                      delete e.f;
                      for (key in e.n) if (e.n[has](key) && e.n[key].f) {
                          delete e.n[key].f;
                      }
                  }
                  e = e.n;
              }
          }
      };
      /*\
       * eve.once
       [ method ]
       **
       * Binds given event handler with a given name to only run once then unbind itself.
       | eve.once("login", f);
       | eve("login"); // triggers f
       | eve("login"); // no listeners
       * Use @eve to trigger the listener.
       **
       > Arguments
       **
       - name (string) name of the event, dot (`.`) or slash (`/`) separated, with optional wildcards
       - f (function) event handler function
       **
       = (function) same return function as @eve.on
      \*/
      eve.once = function (name, f) {
          var f2 = function () {
              eve.unbind(name, f2);
              return f.apply(this, arguments);
          };
          return eve.on(name, f2);
      };
      /*\
       * eve.version
       [ property (string) ]
       **
       * Current version of the library.
      \*/
      eve.version = version;
      eve.toString = function () {
          return "You are running Eve " + version;
      };
      (typeof module != "undefined" && module.exports) ? (module.exports = eve) : (typeof define === "function" && define.amd ? (define("eve", [], function() { return eve; })) : (glob.eve = eve));
  })(this);
  
  (function (glob, factory) {
      // AMD support
      if (typeof define == "function" && define.amd) {
          // Define as an anonymous module
          define(["eve"], function (eve) {
              return factory(glob, eve);
          });
      } else if (typeof exports != 'undefined') {
          // Next for Node.js or CommonJS
          var eve = require('eve');
          module.exports = factory(glob, eve);
      } else {
          // Browser globals (glob is window)
          // Snap adds itself to window
          factory(glob, glob.eve);
      }
  }(window || this, function (window, eve) {
  
  // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // 
  // http://www.apache.org/licenses/LICENSE-2.0
  // 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  var mina = (function (eve) {
      var animations = {},
      requestAnimFrame = window.requestAnimationFrame       ||
                         window.webkitRequestAnimationFrame ||
                         window.mozRequestAnimationFrame    ||
                         window.oRequestAnimationFrame      ||
                         window.msRequestAnimationFrame     ||
                         function (callback) {
                             setTimeout(callback, 16);
                         },
      isArray = Array.isArray || function (a) {
          return a instanceof Array ||
              Object.prototype.toString.call(a) == "[object Array]";
      },
      idgen = 0,
      idprefix = "M" + (+new Date).toString(36),
      ID = function () {
          return idprefix + (idgen++).toString(36);
      },
      diff = function (a, b, A, B) {
          if (isArray(a)) {
              res = [];
              for (var i = 0, ii = a.length; i < ii; i++) {
                  res[i] = diff(a[i], b, A[i], B);
              }
              return res;
          }
          var dif = (A - a) / (B - b);
          return function (bb) {
              return a + dif * (bb - b);
          };
      },
      timer = Date.now || function () {
          return +new Date;
      },
      sta = function (val) {
          var a = this;
          if (val == null) {
              return a.s;
          }
          var ds = a.s - val;
          a.b += a.dur * ds;
          a.B += a.dur * ds;
          a.s = val;
      },
      speed = function (val) {
          var a = this;
          if (val == null) {
              return a.spd;
          }
          a.spd = val;
      },
      duration = function (val) {
          var a = this;
          if (val == null) {
              return a.dur;
          }
          a.s = a.s * val / a.dur;
          a.dur = val;
      },
      stopit = function () {
          var a = this;
          delete animations[a.id];
          a.update();
          eve("mina.stop." + a.id, a);
      },
      pause = function () {
          var a = this;
          if (a.pdif) {
              return;
          }
          delete animations[a.id];
          a.update();
          a.pdif = a.get() - a.b;
      },
      resume = function () {
          var a = this;
          if (!a.pdif) {
              return;
          }
          a.b = a.get() - a.pdif;
          delete a.pdif;
          animations[a.id] = a;
      },
      update = function () {
          var a = this,
              res;
          if (isArray(a.start)) {
              res = [];
              for (var j = 0, jj = a.start.length; j < jj; j++) {
                  res[j] = +a.start[j] +
                      (a.end[j] - a.start[j]) * a.easing(a.s);
              }
          } else {
              res = +a.start + (a.end - a.start) * a.easing(a.s);
          }
          a.set(res);
      },
      frame = function () {
          var len = 0;
          for (var i in animations) if (animations.hasOwnProperty(i)) {
              var a = animations[i],
                  b = a.get(),
                  res;
              len++;
              a.s = (b - a.b) / (a.dur / a.spd);
              if (a.s >= 1) {
                  delete animations[i];
                  a.s = 1;
                  len--;
                  (function (a) {
                      setTimeout(function () {
                          eve("mina.finish." + a.id, a);
                      });
                  }(a));
              }
              a.update();
          }
          len && requestAnimFrame(frame);
      },
      /*\
       * mina
       [ method ]
       **
       * Generic animation of numbers
       **
       - a (number) start _slave_ number
       - A (number) end _slave_ number
       - b (number) start _master_ number (start time in general case)
       - B (number) end _master_ number (end time in gereal case)
       - get (function) getter of _master_ number (see @mina.time)
       - set (function) setter of _slave_ number
       - easing (function) #optional easing function, default is @mina.linear
       = (object) animation descriptor
       o {
       o         id (string) animation id,
       o         start (number) start _slave_ number,
       o         end (number) end _slave_ number,
       o         b (number) start _master_ number,
       o         s (number) animation status (0..1),
       o         dur (number) animation duration,
       o         spd (number) animation speed,
       o         get (function) getter of _master_ number (see @mina.time),
       o         set (function) setter of _slave_ number,
       o         easing (function) easing function, default is @mina.linear,
       o         status (function) status getter/setter,
       o         speed (function) speed getter/setter,
       o         duration (function) duration getter/setter,
       o         stop (function) animation stopper
       o         pause (function) pauses the animation
       o         resume (function) resumes the animation
       o         update (function) calles setter with the right value of the animation
       o }
      \*/
      mina = function (a, A, b, B, get, set, easing) {
          var anim = {
              id: ID(),
              start: a,
              end: A,
              b: b,
              s: 0,
              dur: B - b,
              spd: 1,
              get: get,
              set: set,
              easing: easing || mina.linear,
              status: sta,
              speed: speed,
              duration: duration,
              stop: stopit,
              pause: pause,
              resume: resume,
              update: update
          };
          animations[anim.id] = anim;
          var len = 0, i;
          for (i in animations) if (animations.hasOwnProperty(i)) {
              len++;
              if (len == 2) {
                  break;
              }
          }
          len == 1 && requestAnimFrame(frame);
          return anim;
      };
      /*\
       * mina.time
       [ method ]
       **
       * Returns the current time. Equivalent to:
       | function () {
       |     return (new Date).getTime();
       | }
      \*/
      mina.time = timer;
      /*\
       * mina.getById
       [ method ]
       **
       * Returns an animation by its id
       - id (string) animation's id
       = (object) See @mina
      \*/
      mina.getById = function (id) {
          return animations[id] || null;
      };
  
      /*\
       * mina.linear
       [ method ]
       **
       * Default linear easing
       - n (number) input 0..1
       = (number) output 0..1
      \*/
      mina.linear = function (n) {
          return n;
      };
      /*\
       * mina.easeout
       [ method ]
       **
       * Easeout easing
       - n (number) input 0..1
       = (number) output 0..1
      \*/
      mina.easeout = function (n) {
          return Math.pow(n, 1.7);
      };
      /*\
       * mina.easein
       [ method ]
       **
       * Easein easing
       - n (number) input 0..1
       = (number) output 0..1
      \*/
      mina.easein = function (n) {
          return Math.pow(n, .48);
      };
      /*\
       * mina.easeinout
       [ method ]
       **
       * Easeinout easing
       - n (number) input 0..1
       = (number) output 0..1
      \*/
      mina.easeinout = function (n) {
          if (n == 1) {
              return 1;
          }
          if (n == 0) {
              return 0;
          }
          var q = .48 - n / 1.04,
              Q = Math.sqrt(.1734 + q * q),
              x = Q - q,
              X = Math.pow(Math.abs(x), 1 / 3) * (x < 0 ? -1 : 1),
              y = -Q - q,
              Y = Math.pow(Math.abs(y), 1 / 3) * (y < 0 ? -1 : 1),
              t = X + Y + .5;
          return (1 - t) * 3 * t * t + t * t * t;
      };
      /*\
       * mina.backin
       [ method ]
       **
       * Backin easing
       - n (number) input 0..1
       = (number) output 0..1
      \*/
      mina.backin = function (n) {
          if (n == 1) {
              return 1;
          }
          var s = 1.70158;
          return n * n * ((s + 1) * n - s);
      };
      /*\
       * mina.backout
       [ method ]
       **
       * Backout easing
       - n (number) input 0..1
       = (number) output 0..1
      \*/
      mina.backout = function (n) {
          if (n == 0) {
              return 0;
          }
          n = n - 1;
          var s = 1.70158;
          return n * n * ((s + 1) * n + s) + 1;
      };
      /*\
       * mina.elastic
       [ method ]
       **
       * Elastic easing
       - n (number) input 0..1
       = (number) output 0..1
      \*/
      mina.elastic = function (n) {
          if (n == !!n) {
              return n;
          }
          return Math.pow(2, -10 * n) * Math.sin((n - .075) *
              (2 * Math.PI) / .3) + 1;
      };
      /*\
       * mina.bounce
       [ method ]
       **
       * Bounce easing
       - n (number) input 0..1
       = (number) output 0..1
      \*/
      mina.bounce = function (n) {
          var s = 7.5625,
              p = 2.75,
              l;
          if (n < (1 / p)) {
              l = s * n * n;
          } else {
              if (n < (2 / p)) {
                  n -= (1.5 / p);
                  l = s * n * n + .75;
              } else {
                  if (n < (2.5 / p)) {
                      n -= (2.25 / p);
                      l = s * n * n + .9375;
                  } else {
                      n -= (2.625 / p);
                      l = s * n * n + .984375;
                  }
              }
          }
          return l;
      };
      window.mina = mina;
      return mina;
  })(typeof eve == "undefined" ? function () {} : eve);
  // Copyright (c) 2013 - 2015 Adobe Systems Incorporated. All rights reserved.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // 
  // http://www.apache.org/licenses/LICENSE-2.0
  // 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  var Snap = (function(root) {
  Snap.version = "0.4.0";
  /*\
   * Snap
   [ method ]
   **
   * Creates a drawing surface or wraps existing SVG element.
   **
   - width (number|string) width of surface
   - height (number|string) height of surface
   * or
   - DOM (SVGElement) element to be wrapped into Snap structure
   * or
   - array (array) array of elements (will return set of elements)
   * or
   - query (string) CSS query selector
   = (object) @Element
  \*/
  function Snap(w, h) {
      if (w) {
          if (w.nodeType) {
              return wrap(w);
          }
          if (is(w, "array") && Snap.set) {
              return Snap.set.apply(Snap, w);
          }
          if (w instanceof Element) {
              return w;
          }
          if (h == null) {
              w = glob.doc.querySelector(String(w));
              return wrap(w);
          }
      }
      w = w == null ? "100%" : w;
      h = h == null ? "100%" : h;
      return new Paper(w, h);
  }
  Snap.toString = function () {
      return "Snap v" + this.version;
  };
  Snap._ = {};
  var glob = {
      win: root.window,
      doc: root.window.document
  };
  Snap._.glob = glob;
  var has = "hasOwnProperty",
      Str = String,
      toFloat = parseFloat,
      toInt = parseInt,
      math = Math,
      mmax = math.max,
      mmin = math.min,
      abs = math.abs,
      pow = math.pow,
      PI = math.PI,
      round = math.round,
      E = "",
      S = " ",
      objectToString = Object.prototype.toString,
      ISURL = /^url\(['"]?([^\)]+?)['"]?\)$/i,
      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,
      bezierrg = /^(?:cubic-)?bezier\(([^,]+),([^,]+),([^,]+),([^\)]+)\)/,
      reURLValue = /^url\(#?([^)]+)\)$/,
      separator = Snap._.separator = /[,\s]+/,
      whitespace = /[\s]/g,
      commaSpaces = /[\s]*,[\s]*/,
      hsrg = {hs: 1, rg: 1},
      pathCommand = /([a-z])[\s,]*((-?\d*\.?\d*(?:e[\-+]?\d+)?[\s]*,?[\s]*)+)/ig,
      tCommand = /([rstm])[\s,]*((-?\d*\.?\d*(?:e[\-+]?\d+)?[\s]*,?[\s]*)+)/ig,
      pathValues = /(-?\d*\.?\d*(?:e[\-+]?\\d+)?)[\s]*,?[\s]*/ig,
      idgen = 0,
      idprefix = "S" + (+new Date).toString(36),
      ID = function (el) {
          return (el && el.type ? el.type : E) + idprefix + (idgen++).toString(36);
      },
      xlink = "http://www.w3.org/1999/xlink",
      xmlns = "http://www.w3.org/2000/svg",
      hub = {},
      URL = Snap.url = function (url) {
          return "url('#" + url + "')";
      };
  
  function $(el, attr) {
      if (attr) {
          if (el == "#text") {
              el = glob.doc.createTextNode(attr.text || attr["#text"] || "");
          }
          if (el == "#comment") {
              el = glob.doc.createComment(attr.text || attr["#text"] || "");
          }
          if (typeof el == "string") {
              el = $(el);
          }
          if (typeof attr == "string") {
              if (el.nodeType == 1) {
                  if (attr.substring(0, 6) == "xlink:") {
                      return el.getAttributeNS(xlink, attr.substring(6));
                  }
                  if (attr.substring(0, 4) == "xml:") {
                      return el.getAttributeNS(xmlns, attr.substring(4));
                  }
                  return el.getAttribute(attr);
              } else if (attr == "text") {
                  return el.nodeValue;
              } else {
                  return null;
              }
          }
          if (el.nodeType == 1) {
              for (var key in attr) if (attr[has](key)) {
                  var val = Str(attr[key]);
                  if (val) {
                      if (key.substring(0, 6) == "xlink:") {
                          el.setAttributeNS(xlink, key.substring(6), val);
                      } else if (key.substring(0, 4) == "xml:") {
                          el.setAttributeNS(xmlns, key.substring(4), val);
                      } else {
                          el.setAttribute(key, val);
                      }
                  } else {
                      el.removeAttribute(key);
                  }
              }
          } else if ("text" in attr) {
              el.nodeValue = attr.text;
          }
      } else {
          el = glob.doc.createElementNS(xmlns, el);
      }
      return el;
  }
  Snap._.$ = $;
  Snap._.id = ID;
  function getAttrs(el) {
      var attrs = el.attributes,
          name,
          out = {};
      for (var i = 0; i < attrs.length; i++) {
          if (attrs[i].namespaceURI == xlink) {
              name = "xlink:";
          } else {
              name = "";
          }
          name += attrs[i].name;
          out[name] = attrs[i].textContent;
      }
      return out;
  }
  function is(o, type) {
      type = Str.prototype.toLowerCase.call(type);
      if (type == "finite") {
          return isFinite(o);
      }
      if (type == "array" &&
          (o instanceof Array || Array.isArray && Array.isArray(o))) {
          return true;
      }
      return  (type == "null" && o === null) ||
              (type == typeof o && o !== null) ||
              (type == "object" && o === Object(o)) ||
              objectToString.call(o).slice(8, -1).toLowerCase() == type;
  }
  /*\
   * Snap.format
   [ method ]
   **
   * Replaces construction of type `{<name>}` to the corresponding argument
   **
   - token (string) string to format
   - json (object) object which properties are used as a replacement
   = (string) formatted string
   > Usage
   | // this draws a rectangular shape equivalent to "M10,20h40v50h-40z"
   | paper.path(Snap.format("M{x},{y}h{dim.width}v{dim.height}h{dim['negative width']}z", {
   |     x: 10,
   |     y: 20,
   |     dim: {
   |         width: 40,
   |         height: 50,
   |         "negative width": -40
   |     }
   | }));
  \*/
  Snap.format = (function () {
      var tokenRegex = /\{([^\}]+)\}/g,
          objNotationRegex = /(?:(?:^|\.)(.+?)(?=\[|\.|$|\()|\[('|")(.+?)\2\])(\(\))?/g, // matches .xxxxx or ["xxxxx"] to run over object properties
          replacer = function (all, key, obj) {
              var res = obj;
              key.replace(objNotationRegex, function (all, name, quote, quotedName, isFunc) {
                  name = name || quotedName;
                  if (res) {
                      if (name in res) {
                          res = res[name];
                      }
                      typeof res == "function" && isFunc && (res = res());
                  }
              });
              res = (res == null || res == obj ? all : res) + "";
              return res;
          };
      return function (str, obj) {
          return Str(str).replace(tokenRegex, function (all, key) {
              return replacer(all, key, obj);
          });
      };
  })();
  function clone(obj) {
      if (typeof obj == "function" || Object(obj) !== obj) {
          return obj;
      }
      var res = new obj.constructor;
      for (var key in obj) if (obj[has](key)) {
          res[key] = clone(obj[key]);
      }
      return res;
  }
  Snap._.clone = clone;
  function repush(array, item) {
      for (var i = 0, ii = array.length; i < ii; i++) if (array[i] === item) {
          return array.push(array.splice(i, 1)[0]);
      }
  }
  function cacher(f, scope, postprocessor) {
      function newf() {
          var arg = Array.prototype.slice.call(arguments, 0),
              args = arg.join("\u2400"),
              cache = newf.cache = newf.cache || {},
              count = newf.count = newf.count || [];
          if (cache[has](args)) {
              repush(count, args);
              return postprocessor ? postprocessor(cache[args]) : cache[args];
          }
          count.length >= 1e3 && delete cache[count.shift()];
          count.push(args);
          cache[args] = f.apply(scope, arg);
          return postprocessor ? postprocessor(cache[args]) : cache[args];
      }
      return newf;
  }
  Snap._.cacher = cacher;
  function angle(x1, y1, x2, y2, x3, y3) {
      if (x3 == null) {
          var x = x1 - x2,
              y = y1 - y2;
          if (!x && !y) {
              return 0;
          }
          return (180 + math.atan2(-y, -x) * 180 / PI + 360) % 360;
      } else {
          return angle(x1, y1, x3, y3) - angle(x2, y2, x3, y3);
      }
  }
  function rad(deg) {
      return deg % 360 * PI / 180;
  }
  function deg(rad) {
      return rad * 180 / PI % 360;
  }
  function x_y() {
      return this.x + S + this.y;
  }
  function x_y_w_h() {
      return this.x + S + this.y + S + this.width + " \xd7 " + this.height;
  }
  
  /*\
   * Snap.rad
   [ method ]
   **
   * Transform angle to radians
   - deg (number) angle in degrees
   = (number) angle in radians
  \*/
  Snap.rad = rad;
  /*\
   * Snap.deg
   [ method ]
   **
   * Transform angle to degrees
   - rad (number) angle in radians
   = (number) angle in degrees
  \*/
  Snap.deg = deg;
  /*\
   * Snap.sin
   [ method ]
   **
   * Equivalent to `Math.sin()` only works with degrees, not radians.
   - angle (number) angle in degrees
   = (number) sin
  \*/
  Snap.sin = function (angle) {
      return math.sin(Snap.rad(angle));
  };
  /*\
   * Snap.tan
   [ method ]
   **
   * Equivalent to `Math.tan()` only works with degrees, not radians.
   - angle (number) angle in degrees
   = (number) tan
  \*/
  Snap.tan = function (angle) {
      return math.tan(Snap.rad(angle));
  };
  /*\
   * Snap.cos
   [ method ]
   **
   * Equivalent to `Math.cos()` only works with degrees, not radians.
   - angle (number) angle in degrees
   = (number) cos
  \*/
  Snap.cos = function (angle) {
      return math.cos(Snap.rad(angle));
  };
  /*\
   * Snap.asin
   [ method ]
   **
   * Equivalent to `Math.asin()` only works with degrees, not radians.
   - num (number) value
   = (number) asin in degrees
  \*/
  Snap.asin = function (num) {
      return Snap.deg(math.asin(num));
  };
  /*\
   * Snap.acos
   [ method ]
   **
   * Equivalent to `Math.acos()` only works with degrees, not radians.
   - num (number) value
   = (number) acos in degrees
  \*/
  Snap.acos = function (num) {
      return Snap.deg(math.acos(num));
  };
  /*\
   * Snap.atan
   [ method ]
   **
   * Equivalent to `Math.atan()` only works with degrees, not radians.
   - num (number) value
   = (number) atan in degrees
  \*/
  Snap.atan = function (num) {
      return Snap.deg(math.atan(num));
  };
  /*\
   * Snap.atan2
   [ method ]
   **
   * Equivalent to `Math.atan2()` only works with degrees, not radians.
   - num (number) value
   = (number) atan2 in degrees
  \*/
  Snap.atan2 = function (num) {
      return Snap.deg(math.atan2(num));
  };
  /*\
   * Snap.angle
   [ method ]
   **
   * Returns an angle between two or three points
   > Parameters
   - x1 (number) x coord of first point
   - y1 (number) y coord of first point
   - x2 (number) x coord of second point
   - y2 (number) y coord of second point
   - x3 (number) #optional x coord of third point
   - y3 (number) #optional y coord of third point
   = (number) angle in degrees
  \*/
  Snap.angle = angle;
  /*\
   * Snap.len
   [ method ]
   **
   * Returns distance between two points
   > Parameters
   - x1 (number) x coord of first point
   - y1 (number) y coord of first point
   - x2 (number) x coord of second point
   - y2 (number) y coord of second point
   = (number) distance
  \*/
  Snap.len = function (x1, y1, x2, y2) {
      return Math.sqrt(Snap.len2(x1, y1, x2, y2));
  };
  /*\
   * Snap.len2
   [ method ]
   **
   * Returns squared distance between two points
   > Parameters
   - x1 (number) x coord of first point
   - y1 (number) y coord of first point
   - x2 (number) x coord of second point
   - y2 (number) y coord of second point
   = (number) distance
  \*/
  Snap.len2 = function (x1, y1, x2, y2) {
      return (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2);
  };
  /*\
   * Snap.closestPoint
   [ method ]
   **
   * Returns closest point to a given one on a given path.
   > Parameters
   - path (Element) path element
   - x (number) x coord of a point
   - y (number) y coord of a point
   = (object) in format
   {
      x (number) x coord of the point on the path
      y (number) y coord of the point on the path
      length (number) length of the path to the point
      distance (number) distance from the given point to the path
   }
  \*/
  // Copied from http://bl.ocks.org/mbostock/8027637
  Snap.closestPoint = function (path, x, y) {
      function distance2(p) {
          var dx = p.x - x,
              dy = p.y - y;
          return dx * dx + dy * dy;
      }
      var pathNode = path.node,
          pathLength = pathNode.getTotalLength(),
          precision = pathLength / pathNode.pathSegList.numberOfItems * .125,
          best,
          bestLength,
          bestDistance = Infinity;
  
      // linear scan for coarse approximation
      for (var scan, scanLength = 0, scanDistance; scanLength <= pathLength; scanLength += precision) {
          if ((scanDistance = distance2(scan = pathNode.getPointAtLength(scanLength))) < bestDistance) {
              best = scan, bestLength = scanLength, bestDistance = scanDistance;
          }
      }
  
      // binary search for precise estimate
      precision *= .5;
      while (precision > .5) {
          var before,
              after,
              beforeLength,
              afterLength,
              beforeDistance,
              afterDistance;
          if ((beforeLength = bestLength - precision) >= 0 && (beforeDistance = distance2(before = pathNode.getPointAtLength(beforeLength))) < bestDistance) {
              best = before, bestLength = beforeLength, bestDistance = beforeDistance;
          } else if ((afterLength = bestLength + precision) <= pathLength && (afterDistance = distance2(after = pathNode.getPointAtLength(afterLength))) < bestDistance) {
              best = after, bestLength = afterLength, bestDistance = afterDistance;
          } else {
              precision *= .5;
          }
      }
  
      best = {
          x: best.x,
          y: best.y,
          length: bestLength,
          distance: Math.sqrt(bestDistance)
      };
      return best;
  }
  /*\
   * Snap.is
   [ method ]
   **
   * Handy replacement for the `typeof` operator
   - o (…) any object or primitive
   - type (string) name of the type, e.g., `string`, `function`, `number`, etc.
   = (boolean) `true` if given value is of given type
  \*/
  Snap.is = is;
  /*\
   * Snap.snapTo
   [ method ]
   **
   * Snaps given value to given grid
   - values (array|number) given array of values or step of the grid
   - value (number) value to adjust
   - tolerance (number) #optional maximum distance to the target value that would trigger the snap. Default is `10`.
   = (number) adjusted value
  \*/
  Snap.snapTo = function (values, value, tolerance) {
      tolerance = is(tolerance, "finite") ? tolerance : 10;
      if (is(values, "array")) {
          var i = values.length;
          while (i--) if (abs(values[i] - value) <= tolerance) {
              return values[i];
          }
      } else {
          values = +values;
          var rem = value % values;
          if (rem < tolerance) {
              return value - rem;
          }
          if (rem > values - tolerance) {
              return value - rem + values;
          }
      }
      return value;
  };
  // Colour
  /*\
   * Snap.getRGB
   [ method ]
   **
   * Parses color string as RGB object
   - color (string) color string in one of the following formats:
   # <ul>
   #     <li>Color name (<code>red</code>, <code>green</code>, <code>cornflowerblue</code>, etc)</li>
   #     <li>#••• — shortened HTML color: (<code>#000</code>, <code>#fc0</code>, etc.)</li>
   #     <li>#•••••• — full length HTML color: (<code>#000000</code>, <code>#bd2300</code>)</li>
   #     <li>rgb(•••, •••, •••) — red, green and blue channels values: (<code>rgb(200,&nbsp;100,&nbsp;0)</code>)</li>
   #     <li>rgba(•••, •••, •••, •••) — also with opacity</li>
   #     <li>rgb(•••%, •••%, •••%) — same as above, but in %: (<code>rgb(100%,&nbsp;175%,&nbsp;0%)</code>)</li>
   #     <li>rgba(•••%, •••%, •••%, •••%) — also with opacity</li>
   #     <li>hsb(•••, •••, •••) — hue, saturation and brightness values: (<code>hsb(0.5,&nbsp;0.25,&nbsp;1)</code>)</li>
   #     <li>hsba(•••, •••, •••, •••) — also with opacity</li>
   #     <li>hsb(•••%, •••%, •••%) — same as above, but in %</li>
   #     <li>hsba(•••%, •••%, •••%, •••%) — also with opacity</li>
   #     <li>hsl(•••, •••, •••) — hue, saturation and luminosity values: (<code>hsb(0.5,&nbsp;0.25,&nbsp;0.5)</code>)</li>
   #     <li>hsla(•••, •••, •••, •••) — also with opacity</li>
   #     <li>hsl(•••%, •••%, •••%) — same as above, but in %</li>
   #     <li>hsla(•••%, •••%, •••%, •••%) — also with opacity</li>
   # </ul>
   * Note that `%` can be used any time: `rgb(20%, 255, 50%)`.
   = (object) RGB object in the following format:
   o {
   o     r (number) red,
   o     g (number) green,
   o     b (number) blue,
   o     hex (string) color in HTML/CSS format: #••••••,
   o     error (boolean) true if string can't be parsed
   o }
  \*/
  Snap.getRGB = cacher(function (colour) {
      if (!colour || !!((colour = Str(colour)).indexOf("-") + 1)) {
          return {r: -1, g: -1, b: -1, hex: "none", error: 1, toString: rgbtoString};
      }
      if (colour == "none") {
          return {r: -1, g: -1, b: -1, hex: "none", toString: rgbtoString};
      }
      !(hsrg[has](colour.toLowerCase().substring(0, 2)) || colour.charAt() == "#") && (colour = toHex(colour));
      if (!colour) {
          return {r: -1, g: -1, b: -1, hex: "none", error: 1, toString: rgbtoString};
      }
      var res,
          red,
          green,
          blue,
          opacity,
          t,
          values,
          rgb = colour.match(colourRegExp);
      if (rgb) {
          if (rgb[2]) {
              blue = toInt(rgb[2].substring(5), 16);
              green = toInt(rgb[2].substring(3, 5), 16);
              red = toInt(rgb[2].substring(1, 3), 16);
          }
          if (rgb[3]) {
              blue = toInt((t = rgb[3].charAt(3)) + t, 16);
              green = toInt((t = rgb[3].charAt(2)) + t, 16);
              red = toInt((t = rgb[3].charAt(1)) + t, 16);
          }
          if (rgb[4]) {
              values = rgb[4].split(commaSpaces);
              red = toFloat(values[0]);
              values[0].slice(-1) == "%" && (red *= 2.55);
              green = toFloat(values[1]);
              values[1].slice(-1) == "%" && (green *= 2.55);
              blue = toFloat(values[2]);
              values[2].slice(-1) == "%" && (blue *= 2.55);
              rgb[1].toLowerCase().slice(0, 4) == "rgba" && (opacity = toFloat(values[3]));
              values[3] && values[3].slice(-1) == "%" && (opacity /= 100);
          }
          if (rgb[5]) {
              values = rgb[5].split(commaSpaces);
              red = toFloat(values[0]);
              values[0].slice(-1) == "%" && (red /= 100);
              green = toFloat(values[1]);
              values[1].slice(-1) == "%" && (green /= 100);
              blue = toFloat(values[2]);
              values[2].slice(-1) == "%" && (blue /= 100);
              (values[0].slice(-3) == "deg" || values[0].slice(-1) == "\xb0") && (red /= 360);
              rgb[1].toLowerCase().slice(0, 4) == "hsba" && (opacity = toFloat(values[3]));
              values[3] && values[3].slice(-1) == "%" && (opacity /= 100);
              return Snap.hsb2rgb(red, green, blue, opacity);
          }
          if (rgb[6]) {
              values = rgb[6].split(commaSpaces);
              red = toFloat(values[0]);
              values[0].slice(-1) == "%" && (red /= 100);
              green = toFloat(values[1]);
              values[1].slice(-1) == "%" && (green /= 100);
              blue = toFloat(values[2]);
              values[2].slice(-1) == "%" && (blue /= 100);
              (values[0].slice(-3) == "deg" || values[0].slice(-1) == "\xb0") && (red /= 360);
              rgb[1].toLowerCase().slice(0, 4) == "hsla" && (opacity = toFloat(values[3]));
              values[3] && values[3].slice(-1) == "%" && (opacity /= 100);
              return Snap.hsl2rgb(red, green, blue, opacity);
          }
          red = mmin(math.round(red), 255);
          green = mmin(math.round(green), 255);
          blue = mmin(math.round(blue), 255);
          opacity = mmin(mmax(opacity, 0), 1);
          rgb = {r: red, g: green, b: blue, toString: rgbtoString};
          rgb.hex = "#" + (16777216 | blue | (green << 8) | (red << 16)).toString(16).slice(1);
          rgb.opacity = is(opacity, "finite") ? opacity : 1;
          return rgb;
      }
      return {r: -1, g: -1, b: -1, hex: "none", error: 1, toString: rgbtoString};
  }, Snap);
  /*\
   * Snap.hsb
   [ method ]
   **
   * Converts HSB values to a hex representation of the color
   - h (number) hue
   - s (number) saturation
   - b (number) value or brightness
   = (string) hex representation of the color
  \*/
  Snap.hsb = cacher(function (h, s, b) {
      return Snap.hsb2rgb(h, s, b).hex;
  });
  /*\
   * Snap.hsl
   [ method ]
   **
   * Converts HSL values to a hex representation of the color
   - h (number) hue
   - s (number) saturation
   - l (number) luminosity
   = (string) hex representation of the color
  \*/
  Snap.hsl = cacher(function (h, s, l) {
      return Snap.hsl2rgb(h, s, l).hex;
  });
  /*\
   * Snap.rgb
   [ method ]
   **
   * Converts RGB values to a hex representation of the color
   - r (number) red
   - g (number) green
   - b (number) blue
   = (string) hex representation of the color
  \*/
  Snap.rgb = cacher(function (r, g, b, o) {
      if (is(o, "finite")) {
          var round = math.round;
          return "rgba(" + [round(r), round(g), round(b), +o.toFixed(2)] + ")";
      }
      return "#" + (16777216 | b | (g << 8) | (r << 16)).toString(16).slice(1);
  });
  var toHex = function (color) {
      var i = glob.doc.getElementsByTagName("head")[0] || glob.doc.getElementsByTagName("svg")[0],
          red = "rgb(255, 0, 0)";
      toHex = cacher(function (color) {
          if (color.toLowerCase() == "red") {
              return red;
          }
          i.style.color = red;
          i.style.color = color;
          var out = glob.doc.defaultView.getComputedStyle(i, E).getPropertyValue("color");
          return out == red ? null : out;
      });
      return toHex(color);
  },
  hsbtoString = function () {
      return "hsb(" + [this.h, this.s, this.b] + ")";
  },
  hsltoString = function () {
      return "hsl(" + [this.h, this.s, this.l] + ")";
  },
  rgbtoString = function () {
      return this.opacity == 1 || this.opacity == null ?
              this.hex :
              "rgba(" + [this.r, this.g, this.b, this.opacity] + ")";
  },
  prepareRGB = function (r, g, b) {
      if (g == null && is(r, "object") && "r" in r && "g" in r && "b" in r) {
          b = r.b;
          g = r.g;
          r = r.r;
      }
      if (g == null && is(r, string)) {
          var clr = Snap.getRGB(r);
          r = clr.r;
          g = clr.g;
          b = clr.b;
      }
      if (r > 1 || g > 1 || b > 1) {
          r /= 255;
          g /= 255;
          b /= 255;
      }
      
      return [r, g, b];
  },
  packageRGB = function (r, g, b, o) {
      r = math.round(r * 255);
      g = math.round(g * 255);
      b = math.round(b * 255);
      var rgb = {
          r: r,
          g: g,
          b: b,
          opacity: is(o, "finite") ? o : 1,
          hex: Snap.rgb(r, g, b),
          toString: rgbtoString
      };
      is(o, "finite") && (rgb.opacity = o);
      return rgb;
  };
  /*\
   * Snap.color
   [ method ]
   **
   * Parses the color string and returns an object featuring the color's component values
   - clr (string) color string in one of the supported formats (see @Snap.getRGB)
   = (object) Combined RGB/HSB object in the following format:
   o {
   o     r (number) red,
   o     g (number) green,
   o     b (number) blue,
   o     hex (string) color in HTML/CSS format: #••••••,
   o     error (boolean) `true` if string can't be parsed,
   o     h (number) hue,
   o     s (number) saturation,
   o     v (number) value (brightness),
   o     l (number) lightness
   o }
  \*/
  Snap.color = function (clr) {
      var rgb;
      if (is(clr, "object") && "h" in clr && "s" in clr && "b" in clr) {
          rgb = Snap.hsb2rgb(clr);
          clr.r = rgb.r;
          clr.g = rgb.g;
          clr.b = rgb.b;
          clr.opacity = 1;
          clr.hex = rgb.hex;
      } else if (is(clr, "object") && "h" in clr && "s" in clr && "l" in clr) {
          rgb = Snap.hsl2rgb(clr);
          clr.r = rgb.r;
          clr.g = rgb.g;
          clr.b = rgb.b;
          clr.opacity = 1;
          clr.hex = rgb.hex;
      } else {
          if (is(clr, "string")) {
              clr = Snap.getRGB(clr);
          }
          if (is(clr, "object") && "r" in clr && "g" in clr && "b" in clr && !("error" in clr)) {
              rgb = Snap.rgb2hsl(clr);
              clr.h = rgb.h;
              clr.s = rgb.s;
              clr.l = rgb.l;
              rgb = Snap.rgb2hsb(clr);
              clr.v = rgb.b;
          } else {
              clr = {hex: "none"};
              clr.r = clr.g = clr.b = clr.h = clr.s = clr.v = clr.l = -1;
              clr.error = 1;
          }
      }
      clr.toString = rgbtoString;
      return clr;
  };
  /*\
   * Snap.hsb2rgb
   [ method ]
   **
   * Converts HSB values to an RGB object
   - h (number) hue
   - s (number) saturation
   - v (number) value or brightness
   = (object) RGB object in the following format:
   o {
   o     r (number) red,
   o     g (number) green,
   o     b (number) blue,
   o     hex (string) color in HTML/CSS format: #••••••
   o }
  \*/
  Snap.hsb2rgb = function (h, s, v, o) {
      if (is(h, "object") && "h" in h && "s" in h && "b" in h) {
          v = h.b;
          s = h.s;
          o = h.o;
          h = h.h;
      }
      h *= 360;
      var R, G, B, X, C;
      h = (h % 360) / 60;
      C = v * s;
      X = C * (1 - abs(h % 2 - 1));
      R = G = B = v - C;
  
      h = ~~h;
      R += [C, X, 0, 0, X, C][h];
      G += [X, C, C, X, 0, 0][h];
      B += [0, 0, X, C, C, X][h];
      return packageRGB(R, G, B, o);
  };
  /*\
   * Snap.hsl2rgb
   [ method ]
   **
   * Converts HSL values to an RGB object
   - h (number) hue
   - s (number) saturation
   - l (number) luminosity
   = (object) RGB object in the following format:
   o {
   o     r (number) red,
   o     g (number) green,
   o     b (number) blue,
   o     hex (string) color in HTML/CSS format: #••••••
   o }
  \*/
  Snap.hsl2rgb = function (h, s, l, o) {
      if (is(h, "object") && "h" in h && "s" in h && "l" in h) {
          l = h.l;
          s = h.s;
          h = h.h;
      }
      if (h > 1 || s > 1 || l > 1) {
          h /= 360;
          s /= 100;
          l /= 100;
      }
      h *= 360;
      var R, G, B, X, C;
      h = (h % 360) / 60;
      C = 2 * s * (l < .5 ? l : 1 - l);
      X = C * (1 - abs(h % 2 - 1));
      R = G = B = l - C / 2;
  
      h = ~~h;
      R += [C, X, 0, 0, X, C][h];
      G += [X, C, C, X, 0, 0][h];
      B += [0, 0, X, C, C, X][h];
      return packageRGB(R, G, B, o);
  };
  /*\
   * Snap.rgb2hsb
   [ method ]
   **
   * Converts RGB values to an HSB object
   - r (number) red
   - g (number) green
   - b (number) blue
   = (object) HSB object in the following format:
   o {
   o     h (number) hue,
   o     s (number) saturation,
   o     b (number) brightness
   o }
  \*/
  Snap.rgb2hsb = function (r, g, b) {
      b = prepareRGB(r, g, b);
      r = b[0];
      g = b[1];
      b = b[2];
  
      var H, S, V, C;
      V = mmax(r, g, b);
      C = V - mmin(r, g, b);
      H = (C == 0 ? null :
           V == r ? (g - b) / C :
           V == g ? (b - r) / C + 2 :
                    (r - g) / C + 4
          );
      H = ((H + 360) % 6) * 60 / 360;
      S = C == 0 ? 0 : C / V;
      return {h: H, s: S, b: V, toString: hsbtoString};
  };
  /*\
   * Snap.rgb2hsl
   [ method ]
   **
   * Converts RGB values to an HSL object
   - r (number) red
   - g (number) green
   - b (number) blue
   = (object) HSL object in the following format:
   o {
   o     h (number) hue,
   o     s (number) saturation,
   o     l (number) luminosity
   o }
  \*/
  Snap.rgb2hsl = function (r, g, b) {
      b = prepareRGB(r, g, b);
      r = b[0];
      g = b[1];
      b = b[2];
  
      var H, S, L, M, m, C;
      M = mmax(r, g, b);
      m = mmin(r, g, b);
      C = M - m;
      H = (C == 0 ? null :
           M == r ? (g - b) / C :
           M == g ? (b - r) / C + 2 :
                    (r - g) / C + 4);
      H = ((H + 360) % 6) * 60 / 360;
      L = (M + m) / 2;
      S = (C == 0 ? 0 :
           L < .5 ? C / (2 * L) :
                    C / (2 - 2 * L));
      return {h: H, s: S, l: L, toString: hsltoString};
  };
  
  // Transformations
  /*\
   * Snap.parsePathString
   [ method ]
   **
   * Utility method
   **
   * Parses given path string into an array of arrays of path segments
   - pathString (string|array) path string or array of segments (in the last case it is returned straight away)
   = (array) array of segments
  \*/
  Snap.parsePathString = function (pathString) {
      if (!pathString) {
          return null;
      }
      var pth = Snap.path(pathString);
      if (pth.arr) {
          return Snap.path.clone(pth.arr);
      }
      
      var paramCounts = {a: 7, c: 6, o: 2, h: 1, l: 2, m: 2, r: 4, q: 4, s: 4, t: 2, v: 1, u: 3, z: 0},
          data = [];
      if (is(pathString, "array") && is(pathString[0], "array")) { // rough assumption
          data = Snap.path.clone(pathString);
      }
      if (!data.length) {
          Str(pathString).replace(pathCommand, function (a, b, c) {
              var params = [],
                  name = b.toLowerCase();
              c.replace(pathValues, function (a, b) {
                  b && params.push(+b);
              });
              if (name == "m" && params.length > 2) {
                  data.push([b].concat(params.splice(0, 2)));
                  name = "l";
                  b = b == "m" ? "l" : "L";
              }
              if (name == "o" && params.length == 1) {
                  data.push([b, params[0]]);
              }
              if (name == "r") {
                  data.push([b].concat(params));
              } else while (params.length >= paramCounts[name]) {
                  data.push([b].concat(params.splice(0, paramCounts[name])));
                  if (!paramCounts[name]) {
                      break;
                  }
              }
          });
      }
      data.toString = Snap.path.toString;
      pth.arr = Snap.path.clone(data);
      return data;
  };
  /*\
   * Snap.parseTransformString
   [ method ]
   **
   * Utility method
   **
   * Parses given transform string into an array of transformations
   - TString (string|array) transform string or array of transformations (in the last case it is returned straight away)
   = (array) array of transformations
  \*/
  var parseTransformString = Snap.parseTransformString = function (TString) {
      if (!TString) {
          return null;
      }
      var paramCounts = {r: 3, s: 4, t: 2, m: 6},
          data = [];
      if (is(TString, "array") && is(TString[0], "array")) { // rough assumption
          data = Snap.path.clone(TString);
      }
      if (!data.length) {
          Str(TString).replace(tCommand, function (a, b, c) {
              var params = [],
                  name = b.toLowerCase();
              c.replace(pathValues, function (a, b) {
                  b && params.push(+b);
              });
              data.push([b].concat(params));
          });
      }
      data.toString = Snap.path.toString;
      return data;
  };
  function svgTransform2string(tstr) {
      var res = [];
      tstr = tstr.replace(/(?:^|\s)(\w+)\(([^)]+)\)/g, function (all, name, params) {
          params = params.split(/\s*,\s*|\s+/);
          if (name == "rotate" && params.length == 1) {
              params.push(0, 0);
          }
          if (name == "scale") {
              if (params.length > 2) {
                  params = params.slice(0, 2);
              } else if (params.length == 2) {
                  params.push(0, 0);
              }
              if (params.length == 1) {
                  params.push(params[0], 0, 0);
              }
          }
          if (name == "skewX") {
              res.push(["m", 1, 0, math.tan(rad(params[0])), 1, 0, 0]);
          } else if (name == "skewY") {
              res.push(["m", 1, math.tan(rad(params[0])), 0, 1, 0, 0]);
          } else {
              res.push([name.charAt(0)].concat(params));
          }
          return all;
      });
      return res;
  }
  Snap._.svgTransform2string = svgTransform2string;
  Snap._.rgTransform = /^[a-z][\s]*-?\.?\d/i;
  function transform2matrix(tstr, bbox) {
      var tdata = parseTransformString(tstr),
          m = new Snap.Matrix;
      if (tdata) {
          for (var i = 0, ii = tdata.length; i < ii; i++) {
              var t = tdata[i],
                  tlen = t.length,
                  command = Str(t[0]).toLowerCase(),
                  absolute = t[0] != command,
                  inver = absolute ? m.invert() : 0,
                  x1,
                  y1,
                  x2,
                  y2,
                  bb;
              if (command == "t" && tlen == 2){
                  m.translate(t[1], 0);
              } else if (command == "t" && tlen == 3) {
                  if (absolute) {
                      x1 = inver.x(0, 0);
                      y1 = inver.y(0, 0);
                      x2 = inver.x(t[1], t[2]);
                      y2 = inver.y(t[1], t[2]);
                      m.translate(x2 - x1, y2 - y1);
                  } else {
                      m.translate(t[1], t[2]);
                  }
              } else if (command == "r") {
                  if (tlen == 2) {
                      bb = bb || bbox;
                      m.rotate(t[1], bb.x + bb.width / 2, bb.y + bb.height / 2);
                  } else if (tlen == 4) {
                      if (absolute) {
                          x2 = inver.x(t[2], t[3]);
                          y2 = inver.y(t[2], t[3]);
                          m.rotate(t[1], x2, y2);
                      } else {
                          m.rotate(t[1], t[2], t[3]);
                      }
                  }
              } else if (command == "s") {
                  if (tlen == 2 || tlen == 3) {
                      bb = bb || bbox;
                      m.scale(t[1], t[tlen - 1], bb.x + bb.width / 2, bb.y + bb.height / 2);
                  } else if (tlen == 4) {
                      if (absolute) {
                          x2 = inver.x(t[2], t[3]);
                          y2 = inver.y(t[2], t[3]);
                          m.scale(t[1], t[1], x2, y2);
                      } else {
                          m.scale(t[1], t[1], t[2], t[3]);
                      }
                  } else if (tlen == 5) {
                      if (absolute) {
                          x2 = inver.x(t[3], t[4]);
                          y2 = inver.y(t[3], t[4]);
                          m.scale(t[1], t[2], x2, y2);
                      } else {
                          m.scale(t[1], t[2], t[3], t[4]);
                      }
                  }
              } else if (command == "m" && tlen == 7) {
                  m.add(t[1], t[2], t[3], t[4], t[5], t[6]);
              }
          }
      }
      return m;
  }
  Snap._.transform2matrix = transform2matrix;
  Snap._unit2px = unit2px;
  var contains = glob.doc.contains || glob.doc.compareDocumentPosition ?
      function (a, b) {
          var adown = a.nodeType == 9 ? a.documentElement : a,
              bup = b && b.parentNode;
              return a == bup || !!(bup && bup.nodeType == 1 && (
                  adown.contains ?
                      adown.contains(bup) :
                      a.compareDocumentPosition && a.compareDocumentPosition(bup) & 16
              ));
      } :
      function (a, b) {
          if (b) {
              while (b) {
                  b = b.parentNode;
                  if (b == a) {
                      return true;
                  }
              }
          }
          return false;
      };
  function getSomeDefs(el) {
      var p = (el.node.ownerSVGElement && wrap(el.node.ownerSVGElement)) ||
              (el.node.parentNode && wrap(el.node.parentNode)) ||
              Snap.select("svg") ||
              Snap(0, 0),
          pdefs = p.select("defs"),
          defs  = pdefs == null ? false : pdefs.node;
      if (!defs) {
          defs = make("defs", p.node).node;
      }
      return defs;
  }
  function getSomeSVG(el) {
      return el.node.ownerSVGElement && wrap(el.node.ownerSVGElement) || Snap.select("svg");
  }
  Snap._.getSomeDefs = getSomeDefs;
  Snap._.getSomeSVG = getSomeSVG;
  function unit2px(el, name, value) {
      var svg = getSomeSVG(el).node,
          out = {},
          mgr = svg.querySelector(".svg---mgr");
      if (!mgr) {
          mgr = $("rect");
          $(mgr, {x: -9e9, y: -9e9, width: 10, height: 10, "class": "svg---mgr", fill: "none"});
          svg.appendChild(mgr);
      }
      function getW(val) {
          if (val == null) {
              return E;
          }
          if (val == +val) {
              return val;
          }
          $(mgr, {width: val});
          try {
              return mgr.getBBox().width;
          } catch (e) {
              return 0;
          }
      }
      function getH(val) {
          if (val == null) {
              return E;
          }
          if (val == +val) {
              return val;
          }
          $(mgr, {height: val});
          try {
              return mgr.getBBox().height;
          } catch (e) {
              return 0;
          }
      }
      function set(nam, f) {
          if (name == null) {
              out[nam] = f(el.attr(nam) || 0);
          } else if (nam == name) {
              out = f(value == null ? el.attr(nam) || 0 : value);
          }
      }
      switch (el.type) {
          case "rect":
              set("rx", getW);
              set("ry", getH);
          case "image":
              set("width", getW);
              set("height", getH);
          case "text":
              set("x", getW);
              set("y", getH);
          break;
          case "circle":
              set("cx", getW);
              set("cy", getH);
              set("r", getW);
          break;
          case "ellipse":
              set("cx", getW);
              set("cy", getH);
              set("rx", getW);
              set("ry", getH);
          break;
          case "line":
              set("x1", getW);
              set("x2", getW);
              set("y1", getH);
              set("y2", getH);
          break;
          case "marker":
              set("refX", getW);
              set("markerWidth", getW);
              set("refY", getH);
              set("markerHeight", getH);
          break;
          case "radialGradient":
              set("fx", getW);
              set("fy", getH);
          break;
          case "tspan":
              set("dx", getW);
              set("dy", getH);
          break;
          default:
              set(name, getW);
      }
      svg.removeChild(mgr);
      return out;
  }
  /*\
   * Snap.select
   [ method ]
   **
   * Wraps a DOM element specified by CSS selector as @Element
   - query (string) CSS selector of the element
   = (Element) the current element
  \*/
  Snap.select = function (query) {
      query = Str(query).replace(/([^\\]):/g, "$1\\:");
      return wrap(glob.doc.querySelector(query));
  };
  /*\
   * Snap.selectAll
   [ method ]
   **
   * Wraps DOM elements specified by CSS selector as set or array of @Element
   - query (string) CSS selector of the element
   = (Element) the current element
  \*/
  Snap.selectAll = function (query) {
      var nodelist = glob.doc.querySelectorAll(query),
          set = (Snap.set || Array)();
      for (var i = 0; i < nodelist.length; i++) {
          set.push(wrap(nodelist[i]));
      }
      return set;
  };
  
  function add2group(list) {
      if (!is(list, "array")) {
          list = Array.prototype.slice.call(arguments, 0);
      }
      var i = 0,
          j = 0,
          node = this.node;
      while (this[i]) delete this[i++];
      for (i = 0; i < list.length; i++) {
          if (list[i].type == "set") {
              list[i].forEach(function (el) {
                  node.appendChild(el.node);
              });
          } else {
              node.appendChild(list[i].node);
          }
      }
      var children = node.childNodes;
      for (i = 0; i < children.length; i++) {
          this[j++] = wrap(children[i]);
      }
      return this;
  }
  // Hub garbage collector every 10s
  setInterval(function () {
      for (var key in hub) if (hub[has](key)) {
          var el = hub[key],
              node = el.node;
          if (el.type != "svg" && !node.ownerSVGElement || el.type == "svg" && (!node.parentNode || "ownerSVGElement" in node.parentNode && !node.ownerSVGElement)) {
              delete hub[key];
          }
      }
  }, 1e4);
  function Element(el) {
      if (el.snap in hub) {
          return hub[el.snap];
      }
      var svg;
      try {
          svg = el.ownerSVGElement;
      } catch(e) {}
      /*\
       * Element.node
       [ property (object) ]
       **
       * Gives you a reference to the DOM object, so you can assign event handlers or just mess around.
       > Usage
       | // draw a circle at coordinate 10,10 with radius of 10
       | var c = paper.circle(10, 10, 10);
       | c.node.onclick = function () {
       |     c.attr("fill", "red");
       | };
      \*/
      this.node = el;
      if (svg) {
          this.paper = new Paper(svg);
      }
      /*\
       * Element.type
       [ property (string) ]
       **
       * SVG tag name of the given element.
      \*/
      this.type = el.tagName || el.nodeName;
      var id = this.id = ID(this);
      this.anims = {};
      this._ = {
          transform: []
      };
      el.snap = id;
      hub[id] = this;
      if (this.type == "g") {
          this.add = add2group;
      }
      if (this.type in {g: 1, mask: 1, pattern: 1, symbol: 1}) {
          for (var method in Paper.prototype) if (Paper.prototype[has](method)) {
              this[method] = Paper.prototype[method];
          }
      }
  }
     /*\
       * Element.attr
       [ method ]
       **
       * Gets or sets given attributes of the element.
       **
       - params (object) contains key-value pairs of attributes you want to set
       * or
       - param (string) name of the attribute
       = (Element) the current element
       * or
       = (string) value of attribute
       > Usage
       | el.attr({
       |     fill: "#fc0",
       |     stroke: "#000",
       |     strokeWidth: 2, // CamelCase...
       |     "fill-opacity": 0.5, // or dash-separated names
       |     width: "*=2" // prefixed values
       | });
       | console.log(el.attr("fill")); // #fc0
       * Prefixed values in format `"+=10"` supported. All four operations
       * (`+`, `-`, `*` and `/`) could be used. Optionally you can use units for `+`
       * and `-`: `"+=2em"`.
      \*/
      Element.prototype.attr = function (params, value) {
          var el = this,
              node = el.node;
          if (!params) {
              if (node.nodeType != 1) {
                  return {
                      text: node.nodeValue
                  };
              }
              var attr = node.attributes,
                  out = {};
              for (var i = 0, ii = attr.length; i < ii; i++) {
                  out[attr[i].nodeName] = attr[i].nodeValue;
              }
              return out;
          }
          if (is(params, "string")) {
              if (arguments.length > 1) {
                  var json = {};
                  json[params] = value;
                  params = json;
              } else {
                  return eve("snap.util.getattr." + params, el).firstDefined();
              }
          }
          for (var att in params) {
              if (params[has](att)) {
                  eve("snap.util.attr." + att, el, params[att]);
              }
          }
          return el;
      };
  /*\
   * Snap.parse
   [ method ]
   **
   * Parses SVG fragment and converts it into a @Fragment
   **
   - svg (string) SVG string
   = (Fragment) the @Fragment
  \*/
  Snap.parse = function (svg) {
      var f = glob.doc.createDocumentFragment(),
          full = true,
          div = glob.doc.createElement("div");
      svg = Str(svg);
      if (!svg.match(/^\s*<\s*svg(?:\s|>)/)) {
          svg = "<svg>" + svg + "</svg>";
          full = false;
      }
      div.innerHTML = svg;
      svg = div.getElementsByTagName("svg")[0];
      if (svg) {
          if (full) {
              f = svg;
          } else {
              while (svg.firstChild) {
                  f.appendChild(svg.firstChild);
              }
          }
      }
      return new Fragment(f);
  };
  function Fragment(frag) {
      this.node = frag;
  }
  /*\
   * Snap.fragment
   [ method ]
   **
   * Creates a DOM fragment from a given list of elements or strings
   **
   - varargs (…) SVG string
   = (Fragment) the @Fragment
  \*/
  Snap.fragment = function () {
      var args = Array.prototype.slice.call(arguments, 0),
          f = glob.doc.createDocumentFragment();
      for (var i = 0, ii = args.length; i < ii; i++) {
          var item = args[i];
          if (item.node && item.node.nodeType) {
              f.appendChild(item.node);
          }
          if (item.nodeType) {
              f.appendChild(item);
          }
          if (typeof item == "string") {
              f.appendChild(Snap.parse(item).node);
          }
      }
      return new Fragment(f);
  };
  
  function make(name, parent) {
      var res = $(name);
      parent.appendChild(res);
      var el = wrap(res);
      return el;
  }
  function Paper(w, h) {
      var res,
          desc,
          defs,
          proto = Paper.prototype;
      if (w && w.tagName == "svg") {
          if (w.snap in hub) {
              return hub[w.snap];
          }
          var doc = w.ownerDocument;
          res = new Element(w);
          desc = w.getElementsByTagName("desc")[0];
          defs = w.getElementsByTagName("defs")[0];
          if (!desc) {
              desc = $("desc");
              desc.appendChild(doc.createTextNode("Created with Snap"));
              res.node.appendChild(desc);
          }
          if (!defs) {
              defs = $("defs");
              res.node.appendChild(defs);
          }
          res.defs = defs;
          for (var key in proto) if (proto[has](key)) {
              res[key] = proto[key];
          }
          res.paper = res.root = res;
      } else {
          res = make("svg", glob.doc.body);
          $(res.node, {
              height: h,
              version: 1.1,
              width: w,
              xmlns: xmlns
          });
      }
      return res;
  }
  function wrap(dom) {
      if (!dom) {
          return dom;
      }
      if (dom instanceof Element || dom instanceof Fragment) {
          return dom;
      }
      if (dom.tagName && dom.tagName.toLowerCase() == "svg") {
          return new Paper(dom);
      }
      if (dom.tagName && dom.tagName.toLowerCase() == "object" && dom.type == "image/svg+xml") {
          return new Paper(dom.contentDocument.getElementsByTagName("svg")[0]);
      }
      return new Element(dom);
  }
  
  Snap._.make = make;
  Snap._.wrap = wrap;
  /*\
   * Paper.el
   [ method ]
   **
   * Creates an element on paper with a given name and no attributes
   **
   - name (string) tag name
   - attr (object) attributes
   = (Element) the current element
   > Usage
   | var c = paper.circle(10, 10, 10); // is the same as...
   | var c = paper.el("circle").attr({
   |     cx: 10,
   |     cy: 10,
   |     r: 10
   | });
   | // and the same as
   | var c = paper.el("circle", {
   |     cx: 10,
   |     cy: 10,
   |     r: 10
   | });
  \*/
  Paper.prototype.el = function (name, attr) {
      var el = make(name, this.node);
      attr && el.attr(attr);
      return el;
  };
  /*\
   * Element.children
   [ method ]
   **
   * Returns array of all the children of the element.
   = (array) array of Elements
  \*/
  Element.prototype.children = function () {
      var out = [],
          ch = this.node.childNodes;
      for (var i = 0, ii = ch.length; i < ii; i++) {
          out[i] = Snap(ch[i]);
      }
      return out;
  };
  function jsonFiller(root, o) {
      for (var i = 0, ii = root.length; i < ii; i++) {
          var item = {
                  type: root[i].type,
                  attr: root[i].attr()
              },
              children = root[i].children();
          o.push(item);
          if (children.length) {
              jsonFiller(children, item.childNodes = []);
          }
      }
  }
  /*\
   * Element.toJSON
   [ method ]
   **
   * Returns object representation of the given element and all its children.
   = (object) in format
   o {
   o     type (string) this.type,
   o     attr (object) attributes map,
   o     childNodes (array) optional array of children in the same format
   o }
  \*/
  Element.prototype.toJSON = function () {
      var out = [];
      jsonFiller([this], out);
      return out[0];
  };
  // default
  eve.on("snap.util.getattr", function () {
      var att = eve.nt();
      att = att.substring(att.lastIndexOf(".") + 1);
      var css = att.replace(/[A-Z]/g, function (letter) {
          return "-" + letter.toLowerCase();
      });
      if (cssAttr[has](css)) {
          return this.node.ownerDocument.defaultView.getComputedStyle(this.node, null).getPropertyValue(css);
      } else {
          return $(this.node, att);
      }
  });
  var cssAttr = {
      "alignment-baseline": 0,
      "baseline-shift": 0,
      "clip": 0,
      "clip-path": 0,
      "clip-rule": 0,
      "color": 0,
      "color-interpolation": 0,
      "color-interpolation-filters": 0,
      "color-profile": 0,
      "color-rendering": 0,
      "cursor": 0,
      "direction": 0,
      "display": 0,
      "dominant-baseline": 0,
      "enable-background": 0,
      "fill": 0,
      "fill-opacity": 0,
      "fill-rule": 0,
      "filter": 0,
      "flood-color": 0,
      "flood-opacity": 0,
      "font": 0,
      "font-family": 0,
      "font-size": 0,
      "font-size-adjust": 0,
      "font-stretch": 0,
      "font-style": 0,
      "font-variant": 0,
      "font-weight": 0,
      "glyph-orientation-horizontal": 0,
      "glyph-orientation-vertical": 0,
      "image-rendering": 0,
      "kerning": 0,
      "letter-spacing": 0,
      "lighting-color": 0,
      "marker": 0,
      "marker-end": 0,
      "marker-mid": 0,
      "marker-start": 0,
      "mask": 0,
      "opacity": 0,
      "overflow": 0,
      "pointer-events": 0,
      "shape-rendering": 0,
      "stop-color": 0,
      "stop-opacity": 0,
      "stroke": 0,
      "stroke-dasharray": 0,
      "stroke-dashoffset": 0,
      "stroke-linecap": 0,
      "stroke-linejoin": 0,
      "stroke-miterlimit": 0,
      "stroke-opacity": 0,
      "stroke-width": 0,
      "text-anchor": 0,
      "text-decoration": 0,
      "text-rendering": 0,
      "unicode-bidi": 0,
      "visibility": 0,
      "word-spacing": 0,
      "writing-mode": 0
  };
  
  eve.on("snap.util.attr", function (value) {
      var att = eve.nt(),
          attr = {};
      att = att.substring(att.lastIndexOf(".") + 1);
      attr[att] = value;
      var style = att.replace(/-(\w)/gi, function (all, letter) {
              return letter.toUpperCase();
          }),
          css = att.replace(/[A-Z]/g, function (letter) {
              return "-" + letter.toLowerCase();
          });
      if (cssAttr[has](css)) {
          this.node.style[style] = value == null ? E : value;
      } else {
          $(this.node, attr);
      }
  });
  (function (proto) {}(Paper.prototype));
  
  // simple ajax
  /*\
   * Snap.ajax
   [ method ]
   **
   * Simple implementation of Ajax
   **
   - url (string) URL
   - postData (object|string) data for post request
   - callback (function) callback
   - scope (object) #optional scope of callback
   * or
   - url (string) URL
   - callback (function) callback
   - scope (object) #optional scope of callback
   = (XMLHttpRequest) the XMLHttpRequest object, just in case
  \*/
  Snap.ajax = function (url, postData, callback, scope){
      var req = new XMLHttpRequest,
          id = ID();
      if (req) {
          if (is(postData, "function")) {
              scope = callback;
              callback = postData;
              postData = null;
          } else if (is(postData, "object")) {
              var pd = [];
              for (var key in postData) if (postData.hasOwnProperty(key)) {
                  pd.push(encodeURIComponent(key) + "=" + encodeURIComponent(postData[key]));
              }
              postData = pd.join("&");
          }
          req.open((postData ? "POST" : "GET"), url, true);
          if (postData) {
              req.setRequestHeader("X-Requested-With", "XMLHttpRequest");
              req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
          }
          if (callback) {
              eve.once("snap.ajax." + id + ".0", callback);
              eve.once("snap.ajax." + id + ".200", callback);
              eve.once("snap.ajax." + id + ".304", callback);
          }
          req.onreadystatechange = function() {
              if (req.readyState != 4) return;
              eve("snap.ajax." + id + "." + req.status, scope, req);
          };
          if (req.readyState == 4) {
              return req;
          }
          req.send(postData);
          return req;
      }
  };
  /*\
   * Snap.load
   [ method ]
   **
   * Loads external SVG file as a @Fragment (see @Snap.ajax for more advanced AJAX)
   **
   - url (string) URL
   - callback (function) callback
   - scope (object) #optional scope of callback
  \*/
  Snap.load = function (url, callback, scope) {
      Snap.ajax(url, function (req) {
          var f = Snap.parse(req.responseText);
          scope ? callback.call(scope, f) : callback(f);
      });
  };
  var getOffset = function (elem) {
      var box = elem.getBoundingClientRect(),
          doc = elem.ownerDocument,
          body = doc.body,
          docElem = doc.documentElement,
          clientTop = docElem.clientTop || body.clientTop || 0, clientLeft = docElem.clientLeft || body.clientLeft || 0,
          top  = box.top  + (g.win.pageYOffset || docElem.scrollTop || body.scrollTop ) - clientTop,
          left = box.left + (g.win.pageXOffset || docElem.scrollLeft || body.scrollLeft) - clientLeft;
      return {
          y: top,
          x: left
      };
  };
  /*\
   * Snap.getElementByPoint
   [ method ]
   **
   * Returns you topmost element under given point.
   **
   = (object) Snap element object
   - x (number) x coordinate from the top left corner of the window
   - y (number) y coordinate from the top left corner of the window
   > Usage
   | Snap.getElementByPoint(mouseX, mouseY).attr({stroke: "#f00"});
  \*/
  Snap.getElementByPoint = function (x, y) {
      var paper = this,
          svg = paper.canvas,
          target = glob.doc.elementFromPoint(x, y);
      if (glob.win.opera && target.tagName == "svg") {
          var so = getOffset(target),
              sr = target.createSVGRect();
          sr.x = x - so.x;
          sr.y = y - so.y;
          sr.width = sr.height = 1;
          var hits = target.getIntersectionList(sr, null);
          if (hits.length) {
              target = hits[hits.length - 1];
          }
      }
      if (!target) {
          return null;
      }
      return wrap(target);
  };
  /*\
   * Snap.plugin
   [ method ]
   **
   * Let you write plugins. You pass in a function with five arguments, like this:
   | Snap.plugin(function (Snap, Element, Paper, global, Fragment) {
   |     Snap.newmethod = function () {};
   |     Element.prototype.newmethod = function () {};
   |     Paper.prototype.newmethod = function () {};
   | });
   * Inside the function you have access to all main objects (and their
   * prototypes). This allow you to extend anything you want.
   **
   - f (function) your plugin body
  \*/
  Snap.plugin = function (f) {
      f(Snap, Element, Paper, glob, Fragment);
  };
  glob.win.Snap = Snap;
  return Snap;
  }(window || this));
  
  // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  // http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
      var elproto = Element.prototype,
          is = Snap.is,
          Str = String,
          unit2px = Snap._unit2px,
          $ = Snap._.$,
          make = Snap._.make,
          getSomeDefs = Snap._.getSomeDefs,
          has = "hasOwnProperty",
          wrap = Snap._.wrap;
      /*\
       * Element.getBBox
       [ method ]
       **
       * Returns the bounding box descriptor for the given element
       **
       = (object) bounding box descriptor:
       o {
       o     cx: (number) x of the center,
       o     cy: (number) x of the center,
       o     h: (number) height,
       o     height: (number) height,
       o     path: (string) path command for the box,
       o     r0: (number) radius of a circle that fully encloses the box,
       o     r1: (number) radius of the smallest circle that can be enclosed,
       o     r2: (number) radius of the largest circle that can be enclosed,
       o     vb: (string) box as a viewbox command,
       o     w: (number) width,
       o     width: (number) width,
       o     x2: (number) x of the right side,
       o     x: (number) x of the left side,
       o     y2: (number) y of the bottom edge,
       o     y: (number) y of the top edge
       o }
      \*/
      elproto.getBBox = function (isWithoutTransform) {
          if (!Snap.Matrix || !Snap.path) {
              return this.node.getBBox();
          }
          var el = this,
              m = new Snap.Matrix;
          if (el.removed) {
              return Snap._.box();
          }
          while (el.type == "use") {
              if (!isWithoutTransform) {
                  m = m.add(el.transform().localMatrix.translate(el.attr("x") || 0, el.attr("y") || 0));
              }
              if (el.original) {
                  el = el.original;
              } else {
                  var href = el.attr("xlink:href");
                  el = el.original = el.node.ownerDocument.getElementById(href.substring(href.indexOf("#") + 1));
              }
          }
          var _ = el._,
              pathfinder = Snap.path.get[el.type] || Snap.path.get.deflt;
          try {
              if (isWithoutTransform) {
                  _.bboxwt = pathfinder ? Snap.path.getBBox(el.realPath = pathfinder(el)) : Snap._.box(el.node.getBBox());
                  return Snap._.box(_.bboxwt);
              } else {
                  el.realPath = pathfinder(el);
                  el.matrix = el.transform().localMatrix;
                  _.bbox = Snap.path.getBBox(Snap.path.map(el.realPath, m.add(el.matrix)));
                  return Snap._.box(_.bbox);
              }
          } catch (e) {
              // Firefox doesn’t give you bbox of hidden element
              return Snap._.box();
          }
      };
      var propString = function () {
          return this.string;
      };
      function extractTransform(el, tstr) {
          if (tstr == null) {
              var doReturn = true;
              if (el.type == "linearGradient" || el.type == "radialGradient") {
                  tstr = el.node.getAttribute("gradientTransform");
              } else if (el.type == "pattern") {
                  tstr = el.node.getAttribute("patternTransform");
              } else {
                  tstr = el.node.getAttribute("transform");
              }
              if (!tstr) {
                  return new Snap.Matrix;
              }
              tstr = Snap._.svgTransform2string(tstr);
          } else {
              if (!Snap._.rgTransform.test(tstr)) {
                  tstr = Snap._.svgTransform2string(tstr);
              } else {
                  tstr = Str(tstr).replace(/\.{3}|\u2026/g, el._.transform || E);
              }
              if (is(tstr, "array")) {
                  tstr = Snap.path ? Snap.path.toString.call(tstr) : Str(tstr);
              }
              el._.transform = tstr;
          }
          var m = Snap._.transform2matrix(tstr, el.getBBox(1));
          if (doReturn) {
              return m;
          } else {
              el.matrix = m;
          }
      }
      /*\
       * Element.transform
       [ method ]
       **
       * Gets or sets transformation of the element
       **
       - tstr (string) transform string in Snap or SVG format
       = (Element) the current element
       * or
       = (object) transformation descriptor:
       o {
       o     string (string) transform string,
       o     globalMatrix (Matrix) matrix of all transformations applied to element or its parents,
       o     localMatrix (Matrix) matrix of transformations applied only to the element,
       o     diffMatrix (Matrix) matrix of difference between global and local transformations,
       o     global (string) global transformation as string,
       o     local (string) local transformation as string,
       o     toString (function) returns `string` property
       o }
      \*/
      elproto.transform = function (tstr) {
          var _ = this._;
          if (tstr == null) {
              var papa = this,
                  global = new Snap.Matrix(this.node.getCTM()),
                  local = extractTransform(this),
                  ms = [local],
                  m = new Snap.Matrix,
                  i,
                  localString = local.toTransformString(),
                  string = Str(local) == Str(this.matrix) ?
                              Str(_.transform) : localString;
              while (papa.type != "svg" && (papa = papa.parent())) {
                  ms.push(extractTransform(papa));
              }
              i = ms.length;
              while (i--) {
                  m.add(ms[i]);
              }
              return {
                  string: string,
                  globalMatrix: global,
                  totalMatrix: m,
                  localMatrix: local,
                  diffMatrix: global.clone().add(local.invert()),
                  global: global.toTransformString(),
                  total: m.toTransformString(),
                  local: localString,
                  toString: propString
              };
          }
          if (tstr instanceof Snap.Matrix) {
              this.matrix = tstr;
              this._.transform = tstr.toTransformString();
          } else {
              extractTransform(this, tstr);
          }
  
          if (this.node) {
              if (this.type == "linearGradient" || this.type == "radialGradient") {
                  $(this.node, {gradientTransform: this.matrix});
              } else if (this.type == "pattern") {
                  $(this.node, {patternTransform: this.matrix});
              } else {
                  $(this.node, {transform: this.matrix});
              }
          }
  
          return this;
      };
      /*\
       * Element.parent
       [ method ]
       **
       * Returns the element's parent
       **
       = (Element) the parent element
      \*/
      elproto.parent = function () {
          return wrap(this.node.parentNode);
      };
      /*\
       * Element.append
       [ method ]
       **
       * Appends the given element to current one
       **
       - el (Element|Set) element to append
       = (Element) the parent element
      \*/
      /*\
       * Element.add
       [ method ]
       **
       * See @Element.append
      \*/
      elproto.append = elproto.add = function (el) {
          if (el) {
              if (el.type == "set") {
                  var it = this;
                  el.forEach(function (el) {
                      it.add(el);
                  });
                  return this;
              }
              el = wrap(el);
              this.node.appendChild(el.node);
              el.paper = this.paper;
          }
          return this;
      };
      /*\
       * Element.appendTo
       [ method ]
       **
       * Appends the current element to the given one
       **
       - el (Element) parent element to append to
       = (Element) the child element
      \*/
      elproto.appendTo = function (el) {
          if (el) {
              el = wrap(el);
              el.append(this);
          }
          return this;
      };
      /*\
       * Element.prepend
       [ method ]
       **
       * Prepends the given element to the current one
       **
       - el (Element) element to prepend
       = (Element) the parent element
      \*/
      elproto.prepend = function (el) {
          if (el) {
              if (el.type == "set") {
                  var it = this,
                      first;
                  el.forEach(function (el) {
                      if (first) {
                          first.after(el);
                      } else {
                          it.prepend(el);
                      }
                      first = el;
                  });
                  return this;
              }
              el = wrap(el);
              var parent = el.parent();
              this.node.insertBefore(el.node, this.node.firstChild);
              this.add && this.add();
              el.paper = this.paper;
              this.parent() && this.parent().add();
              parent && parent.add();
          }
          return this;
      };
      /*\
       * Element.prependTo
       [ method ]
       **
       * Prepends the current element to the given one
       **
       - el (Element) parent element to prepend to
       = (Element) the child element
      \*/
      elproto.prependTo = function (el) {
          el = wrap(el);
          el.prepend(this);
          return this;
      };
      /*\
       * Element.before
       [ method ]
       **
       * Inserts given element before the current one
       **
       - el (Element) element to insert
       = (Element) the parent element
      \*/
      elproto.before = function (el) {
          if (el.type == "set") {
              var it = this;
              el.forEach(function (el) {
                  var parent = el.parent();
                  it.node.parentNode.insertBefore(el.node, it.node);
                  parent && parent.add();
              });
              this.parent().add();
              return this;
          }
          el = wrap(el);
          var parent = el.parent();
          this.node.parentNode.insertBefore(el.node, this.node);
          this.parent() && this.parent().add();
          parent && parent.add();
          el.paper = this.paper;
          return this;
      };
      /*\
       * Element.after
       [ method ]
       **
       * Inserts given element after the current one
       **
       - el (Element) element to insert
       = (Element) the parent element
      \*/
      elproto.after = function (el) {
          el = wrap(el);
          var parent = el.parent();
          if (this.node.nextSibling) {
              this.node.parentNode.insertBefore(el.node, this.node.nextSibling);
          } else {
              this.node.parentNode.appendChild(el.node);
          }
          this.parent() && this.parent().add();
          parent && parent.add();
          el.paper = this.paper;
          return this;
      };
      /*\
       * Element.insertBefore
       [ method ]
       **
       * Inserts the element after the given one
       **
       - el (Element) element next to whom insert to
       = (Element) the parent element
      \*/
      elproto.insertBefore = function (el) {
          el = wrap(el);
          var parent = this.parent();
          el.node.parentNode.insertBefore(this.node, el.node);
          this.paper = el.paper;
          parent && parent.add();
          el.parent() && el.parent().add();
          return this;
      };
      /*\
       * Element.insertAfter
       [ method ]
       **
       * Inserts the element after the given one
       **
       - el (Element) element next to whom insert to
       = (Element) the parent element
      \*/
      elproto.insertAfter = function (el) {
          el = wrap(el);
          var parent = this.parent();
          el.node.parentNode.insertBefore(this.node, el.node.nextSibling);
          this.paper = el.paper;
          parent && parent.add();
          el.parent() && el.parent().add();
          return this;
      };
      /*\
       * Element.remove
       [ method ]
       **
       * Removes element from the DOM
       = (Element) the detached element
      \*/
      elproto.remove = function () {
          var parent = this.parent();
          this.node.parentNode && this.node.parentNode.removeChild(this.node);
          delete this.paper;
          this.removed = true;
          parent && parent.add();
          return this;
      };
      /*\
       * Element.select
       [ method ]
       **
       * Gathers the nested @Element matching the given set of CSS selectors
       **
       - query (string) CSS selector
       = (Element) result of query selection
      \*/
      elproto.select = function (query) {
          query = Str(query).replace(/([^\\]):/g, "$1\\:");
          return wrap(this.node.querySelector(query));
      };
      /*\
       * Element.selectAll
       [ method ]
       **
       * Gathers nested @Element objects matching the given set of CSS selectors
       **
       - query (string) CSS selector
       = (Set|array) result of query selection
      \*/
      elproto.selectAll = function (query) {
          var nodelist = this.node.querySelectorAll(query),
              set = (Snap.set || Array)();
          for (var i = 0; i < nodelist.length; i++) {
              set.push(wrap(nodelist[i]));
          }
          return set;
      };
      /*\
       * Element.asPX
       [ method ]
       **
       * Returns given attribute of the element as a `px` value (not %, em, etc.)
       **
       - attr (string) attribute name
       - value (string) #optional attribute value
       = (Element) result of query selection
      \*/
      elproto.asPX = function (attr, value) {
          if (value == null) {
              value = this.attr(attr);
          }
          return +unit2px(this, attr, value);
      };
      // 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.
      /*\
       * Element.use
       [ method ]
       **
       * Creates a `<use>` element linked to the current element
       **
       = (Element) the `<use>` element
      \*/
      elproto.use = function () {
          var use,
              id = this.node.id;
          if (!id) {
              id = this.id;
              $(this.node, {
                  id: id
              });
          }
          if (this.type == "linearGradient" || this.type == "radialGradient" ||
              this.type == "pattern") {
              use = make(this.type, this.node.parentNode);
          } else {
              use = make("use", this.node.parentNode);
          }
          $(use.node, {
              "xlink:href": "#" + id
          });
          use.original = this;
          return use;
      };
      function fixids(el) {
          var els = el.selectAll("*"),
              it,
              url = /^\s*url\(("|'|)(.*)\1\)\s*$/,
              ids = [],
              uses = {};
          function urltest(it, name) {
              var val = $(it.node, name);
              val = val && val.match(url);
              val = val && val[2];
              if (val && val.charAt() == "#") {
                  val = val.substring(1);
              } else {
                  return;
              }
              if (val) {
                  uses[val] = (uses[val] || []).concat(function (id) {
                      var attr = {};
                      attr[name] = URL(id);
                      $(it.node, attr);
                  });
              }
          }
          function linktest(it) {
              var val = $(it.node, "xlink:href");
              if (val && val.charAt() == "#") {
                  val = val.substring(1);
              } else {
                  return;
              }
              if (val) {
                  uses[val] = (uses[val] || []).concat(function (id) {
                      it.attr("xlink:href", "#" + id);
                  });
              }
          }
          for (var i = 0, ii = els.length; i < ii; i++) {
              it = els[i];
              urltest(it, "fill");
              urltest(it, "stroke");
              urltest(it, "filter");
              urltest(it, "mask");
              urltest(it, "clip-path");
              linktest(it);
              var oldid = $(it.node, "id");
              if (oldid) {
                  $(it.node, {id: it.id});
                  ids.push({
                      old: oldid,
                      id: it.id
                  });
              }
          }
          for (i = 0, ii = ids.length; i < ii; i++) {
              var fs = uses[ids[i].old];
              if (fs) {
                  for (var j = 0, jj = fs.length; j < jj; j++) {
                      fs[j](ids[i].id);
                  }
              }
          }
      }
      /*\
       * Element.clone
       [ method ]
       **
       * Creates a clone of the element and inserts it after the element
       **
       = (Element) the clone
      \*/
      elproto.clone = function () {
          var clone = wrap(this.node.cloneNode(true));
          if ($(clone.node, "id")) {
              $(clone.node, {id: clone.id});
          }
          fixids(clone);
          clone.insertAfter(this);
          return clone;
      };
      /*\
       * Element.toDefs
       [ method ]
       **
       * Moves element to the shared `<defs>` area
       **
       = (Element) the element
      \*/
      elproto.toDefs = function () {
          var defs = getSomeDefs(this);
          defs.appendChild(this.node);
          return this;
      };
      /*\
       * Element.toPattern
       [ method ]
       **
       * Creates a `<pattern>` element from the current element
       **
       * To create a pattern you have to specify the pattern rect:
       - x (string|number)
       - y (string|number)
       - width (string|number)
       - height (string|number)
       = (Element) the `<pattern>` element
       * You can use pattern later on as an argument for `fill` attribute:
       | var p = paper.path("M10-5-10,15M15,0,0,15M0-5-20,15").attr({
       |         fill: "none",
       |         stroke: "#bada55",
       |         strokeWidth: 5
       |     }).pattern(0, 0, 10, 10),
       |     c = paper.circle(200, 200, 100);
       | c.attr({
       |     fill: p
       | });
      \*/
      elproto.pattern = elproto.toPattern = function (x, y, width, height) {
          var p = make("pattern", getSomeDefs(this));
          if (x == null) {
              x = this.getBBox();
          }
          if (is(x, "object") && "x" in x) {
              y = x.y;
              width = x.width;
              height = x.height;
              x = x.x;
          }
          $(p.node, {
              x: x,
              y: y,
              width: width,
              height: height,
              patternUnits: "userSpaceOnUse",
              id: p.id,
              viewBox: [x, y, width, height].join(" ")
          });
          p.node.appendChild(this.node);
          return p;
      };
  // 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.
  // 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?
      /*\
       * Element.marker
       [ method ]
       **
       * Creates a `<marker>` element from the current element
       **
       * To create a marker you have to specify the bounding rect and reference point:
       - x (number)
       - y (number)
       - width (number)
       - height (number)
       - refX (number)
       - refY (number)
       = (Element) the `<marker>` element
       * 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.
      \*/
      // TODO add usage for markers
      elproto.marker = function (x, y, width, height, refX, refY) {
          var p = make("marker", getSomeDefs(this));
          if (x == null) {
              x = this.getBBox();
          }
          if (is(x, "object") && "x" in x) {
              y = x.y;
              width = x.width;
              height = x.height;
              refX = x.refX || x.cx;
              refY = x.refY || x.cy;
              x = x.x;
          }
          $(p.node, {
              viewBox: [x, y, width, height].join(" "),
              markerWidth: width,
              markerHeight: height,
              orient: "auto",
              refX: refX || 0,
              refY: refY || 0,
              id: p.id
          });
          p.node.appendChild(this.node);
          return p;
      };
      // animation
      function slice(from, to, f) {
          return function (arr) {
              var res = arr.slice(from, to);
              if (res.length == 1) {
                  res = res[0];
              }
              return f ? f(res) : res;
          };
      }
      var Animation = function (attr, ms, easing, callback) {
          if (typeof easing == "function" && !easing.length) {
              callback = easing;
              easing = mina.linear;
          }
          this.attr = attr;
          this.dur = ms;
          easing && (this.easing = easing);
          callback && (this.callback = callback);
      };
      Snap._.Animation = Animation;
      /*\
       * Snap.animation
       [ method ]
       **
       * Creates an animation object
       **
       - attr (object) attributes of final destination
       - duration (number) duration of the animation, in milliseconds
       - easing (function) #optional one of easing functions of @mina or custom one
       - callback (function) #optional callback function that fires when animation ends
       = (object) animation object
      \*/
      Snap.animation = function (attr, ms, easing, callback) {
          return new Animation(attr, ms, easing, callback);
      };
      /*\
       * Element.inAnim
       [ method ]
       **
       * Returns a set of animations that may be able to manipulate the current element
       **
       = (object) in format:
       o {
       o     anim (object) animation object,
       o     mina (object) @mina object,
       o     curStatus (number) 0..1 — status of the animation: 0 — just started, 1 — just finished,
       o     status (function) gets or sets the status of the animation,
       o     stop (function) stops the animation
       o }
      \*/
      elproto.inAnim = function () {
          var el = this,
              res = [];
          for (var id in el.anims) if (el.anims[has](id)) {
              (function (a) {
                  res.push({
                      anim: new Animation(a._attrs, a.dur, a.easing, a._callback),
                      mina: a,
                      curStatus: a.status(),
                      status: function (val) {
                          return a.status(val);
                      },
                      stop: function () {
                          a.stop();
                      }
                  });
              }(el.anims[id]));
          }
          return res;
      };
      /*\
       * Snap.animate
       [ method ]
       **
       * Runs generic animation of one number into another with a caring function
       **
       - from (number|array) number or array of numbers
       - to (number|array) number or array of numbers
       - setter (function) caring function that accepts one number argument
       - duration (number) duration, in milliseconds
       - easing (function) #optional easing function from @mina or custom
       - callback (function) #optional callback function to execute when animation ends
       = (object) animation object in @mina format
       - frameSkips (number) the number of frames to skip redrawing e.g 2 will redraw
         after every 2 frames.
       o {
       o     id (string) animation id, consider it read-only,
       o     duration (function) gets or sets the duration of the animation,
       o     easing (function) easing,
       o     speed (function) gets or sets the speed of the animation,
       o     status (function) gets or sets the status of the animation,
       o     stop (function) stops the animation
       o }
       | var rect = Snap().rect(0, 0, 10, 10);
       | Snap.animate(0, 10, function (val) {
       |     rect.attr({
       |         x: val
       |     });
       | }, 1000);
       | // in given context is equivalent to
       | rect.animate({x: 10}, 1000);
      \*/
      Snap.animate = function (from, to, setter, ms, easing, callback,frameSkips) {
          if (typeof easing == "function" && !easing.length) {
              callback = easing;
              easing = mina.linear;
          }
          
          var rate = 0
          frameSkips = frameSkips || 1 ;
          function wrappedSetter (val){
            if (rate % frameSkips == 0 ){
              setter(val)
              rate = 0
            }
            rate ++
          }
  
          var now = mina.time(),
              anim = mina(from, to, now, now + ms, mina.time, wrappedSetter, easing);
          callback && eve.once("mina.finish." + anim.id, callback);
          return anim;
      };
      /*\
       * Element.stop
       [ method ]
       **
       * Stops all the animations for the current element
       **
       = (Element) the current element
      \*/
      elproto.stop = function () {
          var anims = this.inAnim();
          for (var i = 0, ii = anims.length; i < ii; i++) {
              anims[i].stop();
          }
          return this;
      };
      /*\
       * Element.animate
       [ method ]
       **
       * Animates the given attributes of the element
       **
       - attrs (object) key-value pairs of destination attributes
       - duration (number) duration of the animation in milliseconds
       - easing (function) #optional easing function from @mina or custom
       - callback (function) #optional callback function that executes when the animation ends
       - frameSkips (number) #optional the interval to redraw frames. e.g 2 redraws every 2 frames
         setting it to 1 redraws on every frame.
       = (Element) the current element
      \*/
      elproto.animate = function (attrs, ms, easing, callback, frameSkips) {
          if (typeof easing == "function" && !easing.length) {
              callback = easing;
              easing = mina.linear;
          }
          if (attrs instanceof Animation) {
              callback = attrs.callback;
              easing = attrs.easing;
              ms = easing.dur;
              attrs = attrs.attr;
          }
          var fkeys = [], tkeys = [], keys = {}, from, to, f, eq,
              el = this;
          for (var key in attrs) if (attrs[has](key)) {
              if (el.equal) {
                  eq = el.equal(key, Str(attrs[key]));
                  from = eq.from;
                  to = eq.to;
                  f = eq.f;
              } else {
                  from = +el.attr(key);
                  to = +attrs[key];
              }
              var len = is(from, "array") ? from.length : 1;
              keys[key] = slice(fkeys.length, fkeys.length + len, f);
              fkeys = fkeys.concat(from);
              tkeys = tkeys.concat(to);
          }
  
          function setter (val) {
              var attr = {};
              for (var key in keys) if (keys[has](key)) {
                  attr[key] = keys[key](val);
              }
              el.attr(attr);
          }
  
          var rate = 0
          var frameSkips = frameSkips || 1;
          function wrappedSetter (val){
            if (rate % frameSkips == 0 ){
              setter(val)
              rate = 0
            }
            rate ++
          }
  
          var now = mina.time(),
              anim = mina(fkeys, tkeys, now, now + ms, mina.time, wrappedSetter, easing);
          el.anims[anim.id] = anim;
          anim._attrs = attrs;
          anim._callback = callback;
          eve("snap.animcreated." + el.id, anim);
          eve.once("mina.finish." + anim.id, function () {
              delete el.anims[anim.id];
              callback && callback.call(el);
          });
          eve.once("mina.stop." + anim.id, function () {
              delete el.anims[anim.id];
          });
          return el;
      };
      var eldata = {};
      /*\
       * Element.data
       [ method ]
       **
       * Adds or retrieves given value associated with given key. (Don’t confuse
       * with `data-` attributes)
       *
       * See also @Element.removeData
       - key (string) key to store data
       - value (any) #optional value to store
       = (object) @Element
       * or, if value is not specified:
       = (any) value
       > Usage
       | for (var i = 0, i < 5, i++) {
       |     paper.circle(10 + 15 * i, 10, 10)
       |          .attr({fill: "#000"})
       |          .data("i", i)
       |          .click(function () {
       |             alert(this.data("i"));
       |          });
       | }
      \*/
      elproto.data = function (key, value) {
          var data = eldata[this.id] = eldata[this.id] || {};
          if (arguments.length == 0){
              eve("snap.data.get." + this.id, this, data, null);
              return data;
          }
          if (arguments.length == 1) {
              if (Snap.is(key, "object")) {
                  for (var i in key) if (key[has](i)) {
                      this.data(i, key[i]);
                  }
                  return this;
              }
              eve("snap.data.get." + this.id, this, data[key], key);
              return data[key];
          }
          data[key] = value;
          eve("snap.data.set." + this.id, this, value, key);
          return this;
      };
      /*\
       * Element.removeData
       [ method ]
       **
       * Removes value associated with an element by given key.
       * If key is not provided, removes all the data of the element.
       - key (string) #optional key
       = (object) @Element
      \*/
      elproto.removeData = function (key) {
          if (key == null) {
              eldata[this.id] = {};
          } else {
              eldata[this.id] && delete eldata[this.id][key];
          }
          return this;
      };
      /*\
       * Element.outerSVG
       [ method ]
       **
       * Returns SVG code for the element, equivalent to HTML's `outerHTML`.
       *
       * See also @Element.innerSVG
       = (string) SVG code for the element
      \*/
      /*\
       * Element.toString
       [ method ]
       **
       * See @Element.outerSVG
      \*/
      elproto.outerSVG = elproto.toString = toString(1);
      /*\
       * Element.innerSVG
       [ method ]
       **
       * Returns SVG code for the element's contents, equivalent to HTML's `innerHTML`
       = (string) SVG code for the element
      \*/
      elproto.innerSVG = toString();
      function toString(type) {
          return function () {
              var res = type ? "<" + this.type : "",
                  attr = this.node.attributes,
                  chld = this.node.childNodes;
              if (type) {
                  for (var i = 0, ii = attr.length; i < ii; i++) {
                      res += " " + attr[i].name + '="' +
                              attr[i].value.replace(/"/g, '\\"') + '"';
                  }
              }
              if (chld.length) {
                  type && (res += ">");
                  for (i = 0, ii = chld.length; i < ii; i++) {
                      if (chld[i].nodeType == 3) {
                          res += chld[i].nodeValue;
                      } else if (chld[i].nodeType == 1) {
                          res += wrap(chld[i]).toString();
                      }
                  }
                  type && (res += "</" + this.type + ">");
              } else {
                  type && (res += "/>");
              }
              return res;
          };
      }
      elproto.toDataURL = function () {
          if (window && window.btoa) {
              var bb = this.getBBox(),
                  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>', {
                  x: +bb.x.toFixed(3),
                  y: +bb.y.toFixed(3),
                  width: +bb.width.toFixed(3),
                  height: +bb.height.toFixed(3),
                  contents: this.outerSVG()
              });
              return "data:image/svg+xml;base64," + btoa(unescape(encodeURIComponent(svg)));
          }
      };
      /*\
       * Fragment.select
       [ method ]
       **
       * See @Element.select
      \*/
      Fragment.prototype.select = elproto.select;
      /*\
       * Fragment.selectAll
       [ method ]
       **
       * See @Element.selectAll
      \*/
      Fragment.prototype.selectAll = elproto.selectAll;
  });
  
  // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // 
  // http://www.apache.org/licenses/LICENSE-2.0
  // 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
      var objectToString = Object.prototype.toString,
          Str = String,
          math = Math,
          E = "";
      function Matrix(a, b, c, d, e, f) {
          if (b == null && objectToString.call(a) == "[object SVGMatrix]") {
              this.a = a.a;
              this.b = a.b;
              this.c = a.c;
              this.d = a.d;
              this.e = a.e;
              this.f = a.f;
              return;
          }
          if (a != null) {
              this.a = +a;
              this.b = +b;
              this.c = +c;
              this.d = +d;
              this.e = +e;
              this.f = +f;
          } else {
              this.a = 1;
              this.b = 0;
              this.c = 0;
              this.d = 1;
              this.e = 0;
              this.f = 0;
          }
      }
      (function (matrixproto) {
          /*\
           * Matrix.add
           [ method ]
           **
           * Adds the given matrix to existing one
           - a (number)
           - b (number)
           - c (number)
           - d (number)
           - e (number)
           - f (number)
           * or
           - matrix (object) @Matrix
          \*/
          matrixproto.add = function (a, b, c, d, e, f) {
              var out = [[], [], []],
                  m = [[this.a, this.c, this.e], [this.b, this.d, this.f], [0, 0, 1]],
                  matrix = [[a, c, e], [b, d, f], [0, 0, 1]],
                  x, y, z, res;
  
              if (a && a instanceof Matrix) {
                  matrix = [[a.a, a.c, a.e], [a.b, a.d, a.f], [0, 0, 1]];
              }
  
              for (x = 0; x < 3; x++) {
                  for (y = 0; y < 3; y++) {
                      res = 0;
                      for (z = 0; z < 3; z++) {
                          res += m[x][z] * matrix[z][y];
                      }
                      out[x][y] = res;
                  }
              }
              this.a = out[0][0];
              this.b = out[1][0];
              this.c = out[0][1];
              this.d = out[1][1];
              this.e = out[0][2];
              this.f = out[1][2];
              return this;
          };
          /*\
           * Matrix.invert
           [ method ]
           **
           * Returns an inverted version of the matrix
           = (object) @Matrix
          \*/
          matrixproto.invert = function () {
              var me = this,
                  x = me.a * me.d - me.b * me.c;
              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);
          };
          /*\
           * Matrix.clone
           [ method ]
           **
           * Returns a copy of the matrix
           = (object) @Matrix
          \*/
          matrixproto.clone = function () {
              return new Matrix(this.a, this.b, this.c, this.d, this.e, this.f);
          };
          /*\
           * Matrix.translate
           [ method ]
           **
           * Translate the matrix
           - x (number) horizontal offset distance
           - y (number) vertical offset distance
          \*/
          matrixproto.translate = function (x, y) {
              return this.add(1, 0, 0, 1, x, y);
          };
          /*\
           * Matrix.scale
           [ method ]
           **
           * Scales the matrix
           - x (number) amount to be scaled, with `1` resulting in no change
           - y (number) #optional amount to scale along the vertical axis. (Otherwise `x` applies to both axes.)
           - cx (number) #optional horizontal origin point from which to scale
           - cy (number) #optional vertical origin point from which to scale
           * Default cx, cy is the middle point of the element.
          \*/
          matrixproto.scale = function (x, y, cx, cy) {
              y == null && (y = x);
              (cx || cy) && this.add(1, 0, 0, 1, cx, cy);
              this.add(x, 0, 0, y, 0, 0);
              (cx || cy) && this.add(1, 0, 0, 1, -cx, -cy);
              return this;
          };
          /*\
           * Matrix.rotate
           [ method ]
           **
           * Rotates the matrix
           - a (number) angle of rotation, in degrees
           - x (number) horizontal origin point from which to rotate
           - y (number) vertical origin point from which to rotate
          \*/
          matrixproto.rotate = function (a, x, y) {
              a = Snap.rad(a);
              x = x || 0;
              y = y || 0;
              var cos = +math.cos(a).toFixed(9),
                  sin = +math.sin(a).toFixed(9);
              this.add(cos, sin, -sin, cos, x, y);
              return this.add(1, 0, 0, 1, -x, -y);
          };
          /*\
           * Matrix.x
           [ method ]
           **
           * Returns x coordinate for given point after transformation described by the matrix. See also @Matrix.y
           - x (number)
           - y (number)
           = (number) x
          \*/
          matrixproto.x = function (x, y) {
              return x * this.a + y * this.c + this.e;
          };
          /*\
           * Matrix.y
           [ method ]
           **
           * Returns y coordinate for given point after transformation described by the matrix. See also @Matrix.x
           - x (number)
           - y (number)
           = (number) y
          \*/
          matrixproto.y = function (x, y) {
              return x * this.b + y * this.d + this.f;
          };
          matrixproto.get = function (i) {
              return +this[Str.fromCharCode(97 + i)].toFixed(4);
          };
          matrixproto.toString = function () {
              return "matrix(" + [this.get(0), this.get(1), this.get(2), this.get(3), this.get(4), this.get(5)].join() + ")";
          };
          matrixproto.offset = function () {
              return [this.e.toFixed(4), this.f.toFixed(4)];
          };
          function norm(a) {
              return a[0] * a[0] + a[1] * a[1];
          }
          function normalize(a) {
              var mag = math.sqrt(norm(a));
              a[0] && (a[0] /= mag);
              a[1] && (a[1] /= mag);
          }
          /*\
           * Matrix.determinant
           [ method ]
           **
           * Finds determinant of the given matrix.
           = (number) determinant
          \*/
          matrixproto.determinant = function () {
              return this.a * this.d - this.b * this.c;
          };
          /*\
           * Matrix.split
           [ method ]
           **
           * Splits matrix into primitive transformations
           = (object) in format:
           o dx (number) translation by x
           o dy (number) translation by y
           o scalex (number) scale by x
           o scaley (number) scale by y
           o shear (number) shear
           o rotate (number) rotation in deg
           o isSimple (boolean) could it be represented via simple transformations
          \*/
          matrixproto.split = function () {
              var out = {};
              // translation
              out.dx = this.e;
              out.dy = this.f;
  
              // scale and shear
              var row = [[this.a, this.c], [this.b, this.d]];
              out.scalex = math.sqrt(norm(row[0]));
              normalize(row[0]);
  
              out.shear = row[0][0] * row[1][0] + row[0][1] * row[1][1];
              row[1] = [row[1][0] - row[0][0] * out.shear, row[1][1] - row[0][1] * out.shear];
  
              out.scaley = math.sqrt(norm(row[1]));
              normalize(row[1]);
              out.shear /= out.scaley;
  
              if (this.determinant() < 0) {
                  out.scalex = -out.scalex;
              }
  
              // rotation
              var sin = -row[0][1],
                  cos = row[1][1];
              if (cos < 0) {
                  out.rotate = Snap.deg(math.acos(cos));
                  if (sin < 0) {
                      out.rotate = 360 - out.rotate;
                  }
              } else {
                  out.rotate = Snap.deg(math.asin(sin));
              }
  
              out.isSimple = !+out.shear.toFixed(9) && (out.scalex.toFixed(9) == out.scaley.toFixed(9) || !out.rotate);
              out.isSuperSimple = !+out.shear.toFixed(9) && out.scalex.toFixed(9) == out.scaley.toFixed(9) && !out.rotate;
              out.noRotation = !+out.shear.toFixed(9) && !out.rotate;
              return out;
          };
          /*\
           * Matrix.toTransformString
           [ method ]
           **
           * Returns transform string that represents given matrix
           = (string) transform string
          \*/
          matrixproto.toTransformString = function (shorter) {
              var s = shorter || this.split();
              if (!+s.shear.toFixed(9)) {
                  s.scalex = +s.scalex.toFixed(4);
                  s.scaley = +s.scaley.toFixed(4);
                  s.rotate = +s.rotate.toFixed(4);
                  return  (s.dx || s.dy ? "t" + [+s.dx.toFixed(4), +s.dy.toFixed(4)] : E) + 
                          (s.scalex != 1 || s.scaley != 1 ? "s" + [s.scalex, s.scaley, 0, 0] : E) +
                          (s.rotate ? "r" + [+s.rotate.toFixed(4), 0, 0] : E);
              } else {
                  return "m" + [this.get(0), this.get(1), this.get(2), this.get(3), this.get(4), this.get(5)];
              }
          };
      })(Matrix.prototype);
      /*\
       * Snap.Matrix
       [ method ]
       **
       * Matrix constructor, extend on your own risk.
       * To create matrices use @Snap.matrix.
      \*/
      Snap.Matrix = Matrix;
      /*\
       * Snap.matrix
       [ method ]
       **
       * Utility method
       **
       * Returns a matrix based on the given parameters
       - a (number)
       - b (number)
       - c (number)
       - d (number)
       - e (number)
       - f (number)
       * or
       - svgMatrix (SVGMatrix)
       = (object) @Matrix
      \*/
      Snap.matrix = function (a, b, c, d, e, f) {
          return new Matrix(a, b, c, d, e, f);
      };
  });
  // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // 
  // http://www.apache.org/licenses/LICENSE-2.0
  // 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
      var has = "hasOwnProperty",
          make = Snap._.make,
          wrap = Snap._.wrap,
          is = Snap.is,
          getSomeDefs = Snap._.getSomeDefs,
          reURLValue = /^url\(#?([^)]+)\)$/,
          $ = Snap._.$,
          URL = Snap.url,
          Str = String,
          separator = Snap._.separator,
          E = "";
      // Attributes event handlers
      eve.on("snap.util.attr.mask", function (value) {
          if (value instanceof Element || value instanceof Fragment) {
              eve.stop();
              if (value instanceof Fragment && value.node.childNodes.length == 1) {
                  value = value.node.firstChild;
                  getSomeDefs(this).appendChild(value);
                  value = wrap(value);
              }
              if (value.type == "mask") {
                  var mask = value;
              } else {
                  mask = make("mask", getSomeDefs(this));
                  mask.node.appendChild(value.node);
              }
              !mask.node.id && $(mask.node, {
                  id: mask.id
              });
              $(this.node, {
                  mask: URL(mask.id)
              });
          }
      });
      (function (clipIt) {
          eve.on("snap.util.attr.clip", clipIt);
          eve.on("snap.util.attr.clip-path", clipIt);
          eve.on("snap.util.attr.clipPath", clipIt);
      }(function (value) {
          if (value instanceof Element || value instanceof Fragment) {
              eve.stop();
              if (value.type == "clipPath") {
                  var clip = value;
              } else {
                  clip = make("clipPath", getSomeDefs(this));
                  clip.node.appendChild(value.node);
                  !clip.node.id && $(clip.node, {
                      id: clip.id
                  });
              }
              $(this.node, {
                  "clip-path": URL(clip.node.id || clip.id)
              });
          }
      }));
      function fillStroke(name) {
          return function (value) {
              eve.stop();
              if (value instanceof Fragment && value.node.childNodes.length == 1 &&
                  (value.node.firstChild.tagName == "radialGradient" ||
                  value.node.firstChild.tagName == "linearGradient" ||
                  value.node.firstChild.tagName == "pattern")) {
                  value = value.node.firstChild;
                  getSomeDefs(this).appendChild(value);
                  value = wrap(value);
              }
              if (value instanceof Element) {
                  if (value.type == "radialGradient" || value.type == "linearGradient"
                     || value.type == "pattern") {
                      if (!value.node.id) {
                          $(value.node, {
                              id: value.id
                          });
                      }
                      var fill = URL(value.node.id);
                  } else {
                      fill = value.attr(name);
                  }
              } else {
                  fill = Snap.color(value);
                  if (fill.error) {
                      var grad = Snap(getSomeDefs(this).ownerSVGElement).gradient(value);
                      if (grad) {
                          if (!grad.node.id) {
                              $(grad.node, {
                                  id: grad.id
                              });
                          }
                          fill = URL(grad.node.id);
                      } else {
                          fill = value;
                      }
                  } else {
                      fill = Str(fill);
                  }
              }
              var attrs = {};
              attrs[name] = fill;
              $(this.node, attrs);
              this.node.style[name] = E;
          };
      }
      eve.on("snap.util.attr.fill", fillStroke("fill"));
      eve.on("snap.util.attr.stroke", fillStroke("stroke"));
      var gradrg = /^([lr])(?:\(([^)]*)\))?(.*)$/i;
      eve.on("snap.util.grad.parse", function parseGrad(string) {
          string = Str(string);
          var tokens = string.match(gradrg);
          if (!tokens) {
              return null;
          }
          var type = tokens[1],
              params = tokens[2],
              stops = tokens[3];
          params = params.split(/\s*,\s*/).map(function (el) {
              return +el == el ? +el : el;
          });
          if (params.length == 1 && params[0] == 0) {
              params = [];
          }
          stops = stops.split("-");
          stops = stops.map(function (el) {
              el = el.split(":");
              var out = {
                  color: el[0]
              };
              if (el[1]) {
                  out.offset = parseFloat(el[1]);
              }
              return out;
          });
          return {
              type: type,
              params: params,
              stops: stops
          };
      });
  
      eve.on("snap.util.attr.d", function (value) {
          eve.stop();
          if (is(value, "array") && is(value[0], "array")) {
              value = Snap.path.toString.call(value);
          }
          value = Str(value);
          if (value.match(/[ruo]/i)) {
              value = Snap.path.toAbsolute(value);
          }
          $(this.node, {d: value});
      })(-1);
      eve.on("snap.util.attr.#text", function (value) {
          eve.stop();
          value = Str(value);
          var txt = glob.doc.createTextNode(value);
          while (this.node.firstChild) {
              this.node.removeChild(this.node.firstChild);
          }
          this.node.appendChild(txt);
      })(-1);
      eve.on("snap.util.attr.path", function (value) {
          eve.stop();
          this.attr({d: value});
      })(-1);
      eve.on("snap.util.attr.class", function (value) {
          eve.stop();
          this.node.className.baseVal = value;
      })(-1);
      eve.on("snap.util.attr.viewBox", function (value) {
          var vb;
          if (is(value, "object") && "x" in value) {
              vb = [value.x, value.y, value.width, value.height].join(" ");
          } else if (is(value, "array")) {
              vb = value.join(" ");
          } else {
              vb = value;
          }
          $(this.node, {
              viewBox: vb
          });
          eve.stop();
      })(-1);
      eve.on("snap.util.attr.transform", function (value) {
          this.transform(value);
          eve.stop();
      })(-1);
      eve.on("snap.util.attr.r", function (value) {
          if (this.type == "rect") {
              eve.stop();
              $(this.node, {
                  rx: value,
                  ry: value
              });
          }
      })(-1);
      eve.on("snap.util.attr.textpath", function (value) {
          eve.stop();
          if (this.type == "text") {
              var id, tp, node;
              if (!value && this.textPath) {
                  tp = this.textPath;
                  while (tp.node.firstChild) {
                      this.node.appendChild(tp.node.firstChild);
                  }
                  tp.remove();
                  delete this.textPath;
                  return;
              }
              if (is(value, "string")) {
                  var defs = getSomeDefs(this),
                      path = wrap(defs.parentNode).path(value);
                  defs.appendChild(path.node);
                  id = path.id;
                  path.attr({id: id});
              } else {
                  value = wrap(value);
                  if (value instanceof Element) {
                      id = value.attr("id");
                      if (!id) {
                          id = value.id;
                          value.attr({id: id});
                      }
                  }
              }
              if (id) {
                  tp = this.textPath;
                  node = this.node;
                  if (tp) {
                      tp.attr({"xlink:href": "#" + id});
                  } else {
                      tp = $("textPath", {
                          "xlink:href": "#" + id
                      });
                      while (node.firstChild) {
                          tp.appendChild(node.firstChild);
                      }
                      node.appendChild(tp);
                      this.textPath = wrap(tp);
                  }
              }
          }
      })(-1);
      eve.on("snap.util.attr.text", function (value) {
          if (this.type == "text") {
              var i = 0,
                  node = this.node,
                  tuner = function (chunk) {
                      var out = $("tspan");
                      if (is(chunk, "array")) {
                          for (var i = 0; i < chunk.length; i++) {
                              out.appendChild(tuner(chunk[i]));
                          }
                      } else {
                          out.appendChild(glob.doc.createTextNode(chunk));
                      }
                      out.normalize && out.normalize();
                      return out;
                  };
              while (node.firstChild) {
                  node.removeChild(node.firstChild);
              }
              var tuned = tuner(value);
              while (tuned.firstChild) {
                  node.appendChild(tuned.firstChild);
              }
          }
          eve.stop();
      })(-1);
      function setFontSize(value) {
          eve.stop();
          if (value == +value) {
              value += "px";
          }
          this.node.style.fontSize = value;
      }
      eve.on("snap.util.attr.fontSize", setFontSize)(-1);
      eve.on("snap.util.attr.font-size", setFontSize)(-1);
  
  
      eve.on("snap.util.getattr.transform", function () {
          eve.stop();
          return this.transform();
      })(-1);
      eve.on("snap.util.getattr.textpath", function () {
          eve.stop();
          return this.textPath;
      })(-1);
      // Markers
      (function () {
          function getter(end) {
              return function () {
                  eve.stop();
                  var style = glob.doc.defaultView.getComputedStyle(this.node, null).getPropertyValue("marker-" + end);
                  if (style == "none") {
                      return style;
                  } else {
                      return Snap(glob.doc.getElementById(style.match(reURLValue)[1]));
                  }
              };
          }
          function setter(end) {
              return function (value) {
                  eve.stop();
                  var name = "marker" + end.charAt(0).toUpperCase() + end.substring(1);
                  if (value == "" || !value) {
                      this.node.style[name] = "none";
                      return;
                  }
                  if (value.type == "marker") {
                      var id = value.node.id;
                      if (!id) {
                          $(value.node, {id: value.id});
                      }
                      this.node.style[name] = URL(id);
                      return;
                  }
              };
          }
          eve.on("snap.util.getattr.marker-end", getter("end"))(-1);
          eve.on("snap.util.getattr.markerEnd", getter("end"))(-1);
          eve.on("snap.util.getattr.marker-start", getter("start"))(-1);
          eve.on("snap.util.getattr.markerStart", getter("start"))(-1);
          eve.on("snap.util.getattr.marker-mid", getter("mid"))(-1);
          eve.on("snap.util.getattr.markerMid", getter("mid"))(-1);
          eve.on("snap.util.attr.marker-end", setter("end"))(-1);
          eve.on("snap.util.attr.markerEnd", setter("end"))(-1);
          eve.on("snap.util.attr.marker-start", setter("start"))(-1);
          eve.on("snap.util.attr.markerStart", setter("start"))(-1);
          eve.on("snap.util.attr.marker-mid", setter("mid"))(-1);
          eve.on("snap.util.attr.markerMid", setter("mid"))(-1);
      }());
      eve.on("snap.util.getattr.r", function () {
          if (this.type == "rect" && $(this.node, "rx") == $(this.node, "ry")) {
              eve.stop();
              return $(this.node, "rx");
          }
      })(-1);
      function textExtract(node) {
          var out = [];
          var children = node.childNodes;
          for (var i = 0, ii = children.length; i < ii; i++) {
              var chi = children[i];
              if (chi.nodeType == 3) {
                  out.push(chi.nodeValue);
              }
              if (chi.tagName == "tspan") {
                  if (chi.childNodes.length == 1 && chi.firstChild.nodeType == 3) {
                      out.push(chi.firstChild.nodeValue);
                  } else {
                      out.push(textExtract(chi));
                  }
              }
          }
          return out;
      }
      eve.on("snap.util.getattr.text", function () {
          if (this.type == "text" || this.type == "tspan") {
              eve.stop();
              var out = textExtract(this.node);
              return out.length == 1 ? out[0] : out;
          }
      })(-1);
      eve.on("snap.util.getattr.#text", function () {
          return this.node.textContent;
      })(-1);
      eve.on("snap.util.getattr.viewBox", function () {
          eve.stop();
          var vb = $(this.node, "viewBox");
          if (vb) {
              vb = vb.split(separator);
              return Snap._.box(+vb[0], +vb[1], +vb[2], +vb[3]);
          } else {
              return;
          }
      })(-1);
      eve.on("snap.util.getattr.points", function () {
          var p = $(this.node, "points");
          eve.stop();
          if (p) {
              return p.split(separator);
          } else {
              return;
          }
      })(-1);
      eve.on("snap.util.getattr.path", function () {
          var p = $(this.node, "d");
          eve.stop();
          return p;
      })(-1);
      eve.on("snap.util.getattr.class", function () {
          return this.node.className.baseVal;
      })(-1);
      function getFontSize() {
          eve.stop();
          return this.node.style.fontSize;
      }
      eve.on("snap.util.getattr.fontSize", getFontSize)(-1);
      eve.on("snap.util.getattr.font-size", getFontSize)(-1);
  });
  
  // Copyright (c) 2014 Adobe Systems Incorporated. All rights reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  // http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
      var rgNotSpace = /\S+/g,
          rgBadSpace = /[\t\r\n\f]/g,
          rgTrim = /(^\s+|\s+$)/g,
          Str = String,
          elproto = Element.prototype;
      /*\
       * Element.addClass
       [ method ]
       **
       * Adds given class name or list of class names to the element.
       - value (string) class name or space separated list of class names
       **
       = (Element) original element.
      \*/
      elproto.addClass = function (value) {
          var classes = Str(value || "").match(rgNotSpace) || [],
              elem = this.node,
              className = elem.className.baseVal,
              curClasses = className.match(rgNotSpace) || [],
              j,
              pos,
              clazz,
              finalValue;
  
          if (classes.length) {
              j = 0;
              while ((clazz = classes[j++])) {
                  pos = curClasses.indexOf(clazz);
                  if (!~pos) {
                      curClasses.push(clazz);
                  }
              }
  
              finalValue = curClasses.join(" ");
              if (className != finalValue) {
                  elem.className.baseVal = finalValue;
              }
          }
          return this;
      };
      /*\
       * Element.removeClass
       [ method ]
       **
       * Removes given class name or list of class names from the element.
       - value (string) class name or space separated list of class names
       **
       = (Element) original element.
      \*/
      elproto.removeClass = function (value) {
          var classes = Str(value || "").match(rgNotSpace) || [],
              elem = this.node,
              className = elem.className.baseVal,
              curClasses = className.match(rgNotSpace) || [],
              j,
              pos,
              clazz,
              finalValue;
          if (curClasses.length) {
              j = 0;
              while ((clazz = classes[j++])) {
                  pos = curClasses.indexOf(clazz);
                  if (~pos) {
                      curClasses.splice(pos, 1);
                  }
              }
  
              finalValue = curClasses.join(" ");
              if (className != finalValue) {
                  elem.className.baseVal = finalValue;
              }
          }
          return this;
      };
      /*\
       * Element.hasClass
       [ method ]
       **
       * Checks if the element has a given class name in the list of class names applied to it.
       - value (string) class name
       **
       = (boolean) `true` if the element has given class
      \*/
      elproto.hasClass = function (value) {
          var elem = this.node,
              className = elem.className.baseVal,
              curClasses = className.match(rgNotSpace) || [];
          return !!~curClasses.indexOf(value);
      };
      /*\
       * Element.toggleClass
       [ method ]
       **
       * Add or remove one or more classes from the element, depending on either
       * the class’s presence or the value of the `flag` argument.
       - value (string) class name or space separated list of class names
       - flag (boolean) value to determine whether the class should be added or removed
       **
       = (Element) original element.
      \*/
      elproto.toggleClass = function (value, flag) {
          if (flag != null) {
              if (flag) {
                  return this.addClass(value);
              } else {
                  return this.removeClass(value);
              }
          }
          var classes = (value || "").match(rgNotSpace) || [],
              elem = this.node,
              className = elem.className.baseVal,
              curClasses = className.match(rgNotSpace) || [],
              j,
              pos,
              clazz,
              finalValue;
          j = 0;
          while ((clazz = classes[j++])) {
              pos = curClasses.indexOf(clazz);
              if (~pos) {
                  curClasses.splice(pos, 1);
              } else {
                  curClasses.push(clazz);
              }
          }
  
          finalValue = curClasses.join(" ");
          if (className != finalValue) {
              elem.className.baseVal = finalValue;
          }
          return this;
      };
  });
  
  // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // 
  // http://www.apache.org/licenses/LICENSE-2.0
  // 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
      var operators = {
              "+": function (x, y) {
                      return x + y;
                  },
              "-": function (x, y) {
                      return x - y;
                  },
              "/": function (x, y) {
                      return x / y;
                  },
              "*": function (x, y) {
                      return x * y;
                  }
          },
          Str = String,
          reUnit = /[a-z]+$/i,
          reAddon = /^\s*([+\-\/*])\s*=\s*([\d.eE+\-]+)\s*([^\d\s]+)?\s*$/;
      function getNumber(val) {
          return val;
      }
      function getUnit(unit) {
          return function (val) {
              return +val.toFixed(3) + unit;
          };
      }
      eve.on("snap.util.attr", function (val) {
          var plus = Str(val).match(reAddon);
          if (plus) {
              var evnt = eve.nt(),
                  name = evnt.substring(evnt.lastIndexOf(".") + 1),
                  a = this.attr(name),
                  atr = {};
              eve.stop();
              var unit = plus[3] || "",
                  aUnit = a.match(reUnit),
                  op = operators[plus[1]];
              if (aUnit && aUnit == unit) {
                  val = op(parseFloat(a), +plus[2]);
              } else {
                  a = this.asPX(name);
                  val = op(this.asPX(name), this.asPX(name, plus[2] + unit));
              }
              if (isNaN(a) || isNaN(val)) {
                  return;
              }
              atr[name] = val;
              this.attr(atr);
          }
      })(-10);
      eve.on("snap.util.equal", function (name, b) {
          var A, B, a = Str(this.attr(name) || ""),
              el = this,
              bplus = Str(b).match(reAddon);
          if (bplus) {
              eve.stop();
              var unit = bplus[3] || "",
                  aUnit = a.match(reUnit),
                  op = operators[bplus[1]];
              if (aUnit && aUnit == unit) {
                  return {
                      from: parseFloat(a),
                      to: op(parseFloat(a), +bplus[2]),
                      f: getUnit(aUnit)
                  };
              } else {
                  a = this.asPX(name);
                  return {
                      from: a,
                      to: op(a, this.asPX(name, bplus[2] + unit)),
                      f: getNumber
                  };
              }
          }
      })(-10);
  });
  // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // 
  // http://www.apache.org/licenses/LICENSE-2.0
  // 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
      var proto = Paper.prototype,
          is = Snap.is;
      /*\
       * Paper.rect
       [ method ]
       *
       * Draws a rectangle
       **
       - x (number) x coordinate of the top left corner
       - y (number) y coordinate of the top left corner
       - width (number) width
       - height (number) height
       - rx (number) #optional horizontal radius for rounded corners, default is 0
       - ry (number) #optional vertical radius for rounded corners, default is rx or 0
       = (object) the `rect` element
       **
       > Usage
       | // regular rectangle
       | var c = paper.rect(10, 10, 50, 50);
       | // rectangle with rounded corners
       | var c = paper.rect(40, 40, 50, 50, 10);
      \*/
      proto.rect = function (x, y, w, h, rx, ry) {
          var attr;
          if (ry == null) {
              ry = rx;
          }
          if (is(x, "object") && x == "[object Object]") {
              attr = x;
          } else if (x != null) {
              attr = {
                  x: x,
                  y: y,
                  width: w,
                  height: h
              };
              if (rx != null) {
                  attr.rx = rx;
                  attr.ry = ry;
              }
          }
          return this.el("rect", attr);
      };
      /*\
       * Paper.circle
       [ method ]
       **
       * Draws a circle
       **
       - x (number) x coordinate of the centre
       - y (number) y coordinate of the centre
       - r (number) radius
       = (object) the `circle` element
       **
       > Usage
       | var c = paper.circle(50, 50, 40);
      \*/
      proto.circle = function (cx, cy, r) {
          var attr;
          if (is(cx, "object") && cx == "[object Object]") {
              attr = cx;
          } else if (cx != null) {
              attr = {
                  cx: cx,
                  cy: cy,
                  r: r
              };
          }
          return this.el("circle", attr);
      };
  
      var preload = (function () {
          function onerror() {
              this.parentNode.removeChild(this);
          }
          return function (src, f) {
              var img = glob.doc.createElement("img"),
                  body = glob.doc.body;
              img.style.cssText = "position:absolute;left:-9999em;top:-9999em";
              img.onload = function () {
                  f.call(img);
                  img.onload = img.onerror = null;
                  body.removeChild(img);
              };
              img.onerror = onerror;
              body.appendChild(img);
              img.src = src;
          };
      }());
  
      /*\
       * Paper.image
       [ method ]
       **
       * Places an image on the surface
       **
       - src (string) URI of the source image
       - x (number) x offset position
       - y (number) y offset position
       - width (number) width of the image
       - height (number) height of the image
       = (object) the `image` element
       * or
       = (object) Snap element object with type `image`
       **
       > Usage
       | var c = paper.image("apple.png", 10, 10, 80, 80);
      \*/
      proto.image = function (src, x, y, width, height) {
          var el = this.el("image");
          if (is(src, "object") && "src" in src) {
              el.attr(src);
          } else if (src != null) {
              var set = {
                  "xlink:href": src,
                  preserveAspectRatio: "none"
              };
              if (x != null && y != null) {
                  set.x = x;
                  set.y = y;
              }
              if (width != null && height != null) {
                  set.width = width;
                  set.height = height;
              } else {
                  preload(src, function () {
                      Snap._.$(el.node, {
                          width: this.offsetWidth,
                          height: this.offsetHeight
                      });
                  });
              }
              Snap._.$(el.node, set);
          }
          return el;
      };
      /*\
       * Paper.ellipse
       [ method ]
       **
       * Draws an ellipse
       **
       - x (number) x coordinate of the centre
       - y (number) y coordinate of the centre
       - rx (number) horizontal radius
       - ry (number) vertical radius
       = (object) the `ellipse` element
       **
       > Usage
       | var c = paper.ellipse(50, 50, 40, 20);
      \*/
      proto.ellipse = function (cx, cy, rx, ry) {
          var attr;
          if (is(cx, "object") && cx == "[object Object]") {
              attr = cx;
          } else if (cx != null) {
              attr ={
                  cx: cx,
                  cy: cy,
                  rx: rx,
                  ry: ry
              };
          }
          return this.el("ellipse", attr);
      };
      // SIERRA Paper.path(): Unclear from the link what a Catmull-Rom curveto is, and why it would make life any easier.
      /*\
       * Paper.path
       [ method ]
       **
       * Creates a `<path>` element using the given string as the path's definition
       - pathString (string) #optional path string in SVG format
       * Path string consists of one-letter commands, followed by comma seprarated arguments in numerical form. Example:
       | "M10,20L30,40"
       * 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.
       *
       # <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>
       # <table><thead><tr><th>Command</th><th>Name</th><th>Parameters</th></tr></thead><tbody>
       # <tr><td>M</td><td>moveto</td><td>(x y)+</td></tr>
       # <tr><td>Z</td><td>closepath</td><td>(none)</td></tr>
       # <tr><td>L</td><td>lineto</td><td>(x y)+</td></tr>
       # <tr><td>H</td><td>horizontal lineto</td><td>x+</td></tr>
       # <tr><td>V</td><td>vertical lineto</td><td>y+</td></tr>
       # <tr><td>C</td><td>curveto</td><td>(x1 y1 x2 y2 x y)+</td></tr>
       # <tr><td>S</td><td>smooth curveto</td><td>(x2 y2 x y)+</td></tr>
       # <tr><td>Q</td><td>quadratic Bézier curveto</td><td>(x1 y1 x y)+</td></tr>
       # <tr><td>T</td><td>smooth quadratic Bézier curveto</td><td>(x y)+</td></tr>
       # <tr><td>A</td><td>elliptical arc</td><td>(rx ry x-axis-rotation large-arc-flag sweep-flag x y)+</td></tr>
       # <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>
       * * _Catmull-Rom curveto_ is a not standard SVG command and added to make life easier.
       * 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.
       > Usage
       | var c = paper.path("M10 10L90 90");
       | // draw a diagonal line:
       | // move to 10,10, line to 90,90
      \*/
      proto.path = function (d) {
          var attr;
          if (is(d, "object") && !is(d, "array")) {
              attr = d;
          } else if (d) {
              attr = {d: d};
          }
          return this.el("path", attr);
      };
      /*\
       * Paper.g
       [ method ]
       **
       * Creates a group element
       **
       - varargs (…) #optional elements to nest within the group
       = (object) the `g` element
       **
       > Usage
       | var c1 = paper.circle(),
       |     c2 = paper.rect(),
       |     g = paper.g(c2, c1); // note that the order of elements is different
       * or
       | var c1 = paper.circle(),
       |     c2 = paper.rect(),
       |     g = paper.g();
       | g.add(c2, c1);
      \*/
      /*\
       * Paper.group
       [ method ]
       **
       * See @Paper.g
      \*/
      proto.group = proto.g = function (first) {
          var attr,
              el = this.el("g");
          if (arguments.length == 1 && first && !first.type) {
              el.attr(first);
          } else if (arguments.length) {
              el.add(Array.prototype.slice.call(arguments, 0));
          }
          return el;
      };
      /*\
       * Paper.svg
       [ method ]
       **
       * Creates a nested SVG element.
       - x (number) @optional X of the element
       - y (number) @optional Y of the element
       - width (number) @optional width of the element
       - height (number) @optional height of the element
       - vbx (number) @optional viewbox X
       - vby (number) @optional viewbox Y
       - vbw (number) @optional viewbox width
       - vbh (number) @optional viewbox height
       **
       = (object) the `svg` element
       **
      \*/
      proto.svg = function (x, y, width, height, vbx, vby, vbw, vbh) {
          var attrs = {};
          if (is(x, "object") && y == null) {
              attrs = x;
          } else {
              if (x != null) {
                  attrs.x = x;
              }
              if (y != null) {
                  attrs.y = y;
              }
              if (width != null) {
                  attrs.width = width;
              }
              if (height != null) {
                  attrs.height = height;
              }
              if (vbx != null && vby != null && vbw != null && vbh != null) {
                  attrs.viewBox = [vbx, vby, vbw, vbh];
              }
          }
          return this.el("svg", attrs);
      };
      /*\
       * Paper.mask
       [ method ]
       **
       * Equivalent in behaviour to @Paper.g, except it’s a mask.
       **
       = (object) the `mask` element
       **
      \*/
      proto.mask = function (first) {
          var attr,
              el = this.el("mask");
          if (arguments.length == 1 && first && !first.type) {
              el.attr(first);
          } else if (arguments.length) {
              el.add(Array.prototype.slice.call(arguments, 0));
          }
          return el;
      };
      /*\
       * Paper.ptrn
       [ method ]
       **
       * Equivalent in behaviour to @Paper.g, except it’s a pattern.
       - x (number) @optional X of the element
       - y (number) @optional Y of the element
       - width (number) @optional width of the element
       - height (number) @optional height of the element
       - vbx (number) @optional viewbox X
       - vby (number) @optional viewbox Y
       - vbw (number) @optional viewbox width
       - vbh (number) @optional viewbox height
       **
       = (object) the `pattern` element
       **
      \*/
      proto.ptrn = function (x, y, width, height, vx, vy, vw, vh) {
          if (is(x, "object")) {
              var attr = x;
          } else {
              attr = {patternUnits: "userSpaceOnUse"};
              if (x) {
                  attr.x = x;
              }
              if (y) {
                  attr.y = y;
              }
              if (width != null) {
                  attr.width = width;
              }
              if (height != null) {
                  attr.height = height;
              }
              if (vx != null && vy != null && vw != null && vh != null) {
                  attr.viewBox = [vx, vy, vw, vh];
              } else {
                  attr.viewBox = [x || 0, y || 0, width || 0, height || 0];
              }
          }
          return this.el("pattern", attr);
      };
      /*\
       * Paper.use
       [ method ]
       **
       * Creates a <use> element.
       - id (string) @optional id of element to link
       * or
       - id (Element) @optional element to link
       **
       = (object) the `use` element
       **
      \*/
      proto.use = function (id) {
          if (id != null) {
              if (id instanceof Element) {
                  if (!id.attr("id")) {
                      id.attr({id: Snap._.id(id)});
                  }
                  id = id.attr("id");
              }
              if (String(id).charAt() == "#") {
                  id = id.substring(1);
              }
              return this.el("use", {"xlink:href": "#" + id});
          } else {
              return Element.prototype.use.call(this);
          }
      };
      /*\
       * Paper.symbol
       [ method ]
       **
       * Creates a <symbol> element.
       - vbx (number) @optional viewbox X
       - vby (number) @optional viewbox Y
       - vbw (number) @optional viewbox width
       - vbh (number) @optional viewbox height
       = (object) the `symbol` element
       **
      \*/
      proto.symbol = function (vx, vy, vw, vh) {
          var attr = {};
          if (vx != null && vy != null && vw != null && vh != null) {
              attr.viewBox = [vx, vy, vw, vh];
          }
  
          return this.el("symbol", attr);
      };
      /*\
       * Paper.text
       [ method ]
       **
       * Draws a text string
       **
       - x (number) x coordinate position
       - y (number) y coordinate position
       - text (string|array) The text string to draw or array of strings to nest within separate `<tspan>` elements
       = (object) the `text` element
       **
       > Usage
       | var t1 = paper.text(50, 50, "Snap");
       | var t2 = paper.text(50, 50, ["S","n","a","p"]);
       | // Text path usage
       | t1.attr({textpath: "M10,10L100,100"});
       | // or
       | var pth = paper.path("M10,10L100,100");
       | t1.attr({textpath: pth});
      \*/
      proto.text = function (x, y, text) {
          var attr = {};
          if (is(x, "object")) {
              attr = x;
          } else if (x != null) {
              attr = {
                  x: x,
                  y: y,
                  text: text || ""
              };
          }
          return this.el("text", attr);
      };
      /*\
       * Paper.line
       [ method ]
       **
       * Draws a line
       **
       - x1 (number) x coordinate position of the start
       - y1 (number) y coordinate position of the start
       - x2 (number) x coordinate position of the end
       - y2 (number) y coordinate position of the end
       = (object) the `line` element
       **
       > Usage
       | var t1 = paper.line(50, 50, 100, 100);
      \*/
      proto.line = function (x1, y1, x2, y2) {
          var attr = {};
          if (is(x1, "object")) {
              attr = x1;
          } else if (x1 != null) {
              attr = {
                  x1: x1,
                  x2: x2,
                  y1: y1,
                  y2: y2
              };
          }
          return this.el("line", attr);
      };
      /*\
       * Paper.polyline
       [ method ]
       **
       * Draws a polyline
       **
       - points (array) array of points
       * or
       - varargs (…) points
       = (object) the `polyline` element
       **
       > Usage
       | var p1 = paper.polyline([10, 10, 100, 100]);
       | var p2 = paper.polyline(10, 10, 100, 100);
      \*/
      proto.polyline = function (points) {
          if (arguments.length > 1) {
              points = Array.prototype.slice.call(arguments, 0);
          }
          var attr = {};
          if (is(points, "object") && !is(points, "array")) {
              attr = points;
          } else if (points != null) {
              attr = {points: points};
          }
          return this.el("polyline", attr);
      };
      /*\
       * Paper.polygon
       [ method ]
       **
       * Draws a polygon. See @Paper.polyline
      \*/
      proto.polygon = function (points) {
          if (arguments.length > 1) {
              points = Array.prototype.slice.call(arguments, 0);
          }
          var attr = {};
          if (is(points, "object") && !is(points, "array")) {
              attr = points;
          } else if (points != null) {
              attr = {points: points};
          }
          return this.el("polygon", attr);
      };
      // gradients
      (function () {
          var $ = Snap._.$;
          // gradients' helpers
          function Gstops() {
              return this.selectAll("stop");
          }
          function GaddStop(color, offset) {
              var stop = $("stop"),
                  attr = {
                      offset: +offset + "%"
                  };
              color = Snap.color(color);
              attr["stop-color"] = color.hex;
              if (color.opacity < 1) {
                  attr["stop-opacity"] = color.opacity;
              }
              $(stop, attr);
              this.node.appendChild(stop);
              return this;
          }
          function GgetBBox() {
              if (this.type == "linearGradient") {
                  var x1 = $(this.node, "x1") || 0,
                      x2 = $(this.node, "x2") || 1,
                      y1 = $(this.node, "y1") || 0,
                      y2 = $(this.node, "y2") || 0;
                  return Snap._.box(x1, y1, math.abs(x2 - x1), math.abs(y2 - y1));
              } else {
                  var cx = this.node.cx || .5,
                      cy = this.node.cy || .5,
                      r = this.node.r || 0;
                  return Snap._.box(cx - r, cy - r, r * 2, r * 2);
              }
          }
          function gradient(defs, str) {
              var grad = eve("snap.util.grad.parse", null, str).firstDefined(),
                  el;
              if (!grad) {
                  return null;
              }
              grad.params.unshift(defs);
              if (grad.type.toLowerCase() == "l") {
                  el = gradientLinear.apply(0, grad.params);
              } else {
                  el = gradientRadial.apply(0, grad.params);
              }
              if (grad.type != grad.type.toLowerCase()) {
                  $(el.node, {
                      gradientUnits: "userSpaceOnUse"
                  });
              }
              var stops = grad.stops,
                  len = stops.length,
                  start = 0,
                  j = 0;
              function seed(i, end) {
                  var step = (end - start) / (i - j);
                  for (var k = j; k < i; k++) {
                      stops[k].offset = +(+start + step * (k - j)).toFixed(2);
                  }
                  j = i;
                  start = end;
              }
              len--;
              for (var i = 0; i < len; i++) if ("offset" in stops[i]) {
                  seed(i, stops[i].offset);
              }
              stops[len].offset = stops[len].offset || 100;
              seed(len, stops[len].offset);
              for (i = 0; i <= len; i++) {
                  var stop = stops[i];
                  el.addStop(stop.color, stop.offset);
              }
              return el;
          }
          function gradientLinear(defs, x1, y1, x2, y2) {
              var el = Snap._.make("linearGradient", defs);
              el.stops = Gstops;
              el.addStop = GaddStop;
              el.getBBox = GgetBBox;
              if (x1 != null) {
                  $(el.node, {
                      x1: x1,
                      y1: y1,
                      x2: x2,
                      y2: y2
                  });
              }
              return el;
          }
          function gradientRadial(defs, cx, cy, r, fx, fy) {
              var el = Snap._.make("radialGradient", defs);
              el.stops = Gstops;
              el.addStop = GaddStop;
              el.getBBox = GgetBBox;
              if (cx != null) {
                  $(el.node, {
                      cx: cx,
                      cy: cy,
                      r: r
                  });
              }
              if (fx != null && fy != null) {
                  $(el.node, {
                      fx: fx,
                      fy: fy
                  });
              }
              return el;
          }
          /*\
           * Paper.gradient
           [ method ]
           **
           * Creates a gradient element
           **
           - gradient (string) gradient descriptor
           > Gradient Descriptor
           * The gradient descriptor is an expression formatted as
           * follows: `<type>(<coords>)<colors>`.  The `<type>` can be
           * either linear or radial.  The uppercase `L` or `R` letters
           * indicate absolute coordinates offset from the SVG surface.
           * Lowercase `l` or `r` letters indicate coordinates
           * calculated relative to the element to which the gradient is
           * applied.  Coordinates specify a linear gradient vector as
           * `x1`, `y1`, `x2`, `y2`, or a radial gradient as `cx`, `cy`,
           * `r` and optional `fx`, `fy` specifying a focal point away
           * from the center of the circle. Specify `<colors>` as a list
           * of dash-separated CSS color values.  Each color may be
           * followed by a custom offset value, separated with a colon
           * character.
           > Examples
           * Linear gradient, relative from top-left corner to bottom-right
           * corner, from black through red to white:
           | var g = paper.gradient("l(0, 0, 1, 1)#000-#f00-#fff");
           * Linear gradient, absolute from (0, 0) to (100, 100), from black
           * through red at 25% to white:
           | var g = paper.gradient("L(0, 0, 100, 100)#000-#f00:25-#fff");
           * Radial gradient, relative from the center of the element with radius
           * half the width, from black to white:
           | var g = paper.gradient("r(0.5, 0.5, 0.5)#000-#fff");
           * To apply the gradient:
           | paper.circle(50, 50, 40).attr({
           |     fill: g
           | });
           = (object) the `gradient` element
          \*/
          proto.gradient = function (str) {
              return gradient(this.defs, str);
          };
          proto.gradientLinear = function (x1, y1, x2, y2) {
              return gradientLinear(this.defs, x1, y1, x2, y2);
          };
          proto.gradientRadial = function (cx, cy, r, fx, fy) {
              return gradientRadial(this.defs, cx, cy, r, fx, fy);
          };
          /*\
           * Paper.toString
           [ method ]
           **
           * Returns SVG code for the @Paper
           = (string) SVG code for the @Paper
          \*/
          proto.toString = function () {
              var doc = this.node.ownerDocument,
                  f = doc.createDocumentFragment(),
                  d = doc.createElement("div"),
                  svg = this.node.cloneNode(true),
                  res;
              f.appendChild(d);
              d.appendChild(svg);
              Snap._.$(svg, {xmlns: "http://www.w3.org/2000/svg"});
              res = d.innerHTML;
              f.removeChild(f.firstChild);
              return res;
          };
          /*\
           * Paper.toDataURL
           [ method ]
           **
           * Returns SVG code for the @Paper as Data URI string.
           = (string) Data URI string
          \*/
          proto.toDataURL = function () {
              if (window && window.btoa) {
                  return "data:image/svg+xml;base64," + btoa(unescape(encodeURIComponent(this)));
              }
          };
          /*\
           * Paper.clear
           [ method ]
           **
           * Removes all child nodes of the paper, except <defs>.
          \*/
          proto.clear = function () {
              var node = this.node.firstChild,
                  next;
              while (node) {
                  next = node.nextSibling;
                  if (node.tagName != "defs") {
                      node.parentNode.removeChild(node);
                  } else {
                      proto.clear.call({node: node});
                  }
                  node = next;
              }
          };
      }());
  });
  
  // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // 
  // http://www.apache.org/licenses/LICENSE-2.0
  // 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  Snap.plugin(function (Snap, Element, Paper, glob) {
      var elproto = Element.prototype,
          is = Snap.is,
          clone = Snap._.clone,
          has = "hasOwnProperty",
          p2s = /,?([a-z]),?/gi,
          toFloat = parseFloat,
          math = Math,
          PI = math.PI,
          mmin = math.min,
          mmax = math.max,
          pow = math.pow,
          abs = math.abs;
      function paths(ps) {
          var p = paths.ps = paths.ps || {};
          if (p[ps]) {
              p[ps].sleep = 100;
          } else {
              p[ps] = {
                  sleep: 100
              };
          }
          setTimeout(function () {
              for (var key in p) if (p[has](key) && key != ps) {
                  p[key].sleep--;
                  !p[key].sleep && delete p[key];
              }
          });
          return p[ps];
      }
      function box(x, y, width, height) {
          if (x == null) {
              x = y = width = height = 0;
          }
          if (y == null) {
              y = x.y;
              width = x.width;
              height = x.height;
              x = x.x;
          }
          return {
              x: x,
              y: y,
              width: width,
              w: width,
              height: height,
              h: height,
              x2: x + width,
              y2: y + height,
              cx: x + width / 2,
              cy: y + height / 2,
              r1: math.min(width, height) / 2,
              r2: math.max(width, height) / 2,
              r0: math.sqrt(width * width + height * height) / 2,
              path: rectPath(x, y, width, height),
              vb: [x, y, width, height].join(" ")
          };
      }
      function toString() {
          return this.join(",").replace(p2s, "$1");
      }
      function pathClone(pathArray) {
          var res = clone(pathArray);
          res.toString = toString;
          return res;
      }
      function getPointAtSegmentLength(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, length) {
          if (length == null) {
              return bezlen(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y);
          } else {
              return findDotsAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y,
                  getTotLen(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, length));
          }
      }
      function getLengthFactory(istotal, subpath) {
          function O(val) {
              return +(+val).toFixed(3);
          }
          return Snap._.cacher(function (path, length, onlystart) {
              if (path instanceof Element) {
                  path = path.attr("d");
              }
              path = path2curve(path);
              var x, y, p, l, sp = "", subpaths = {}, point,
                  len = 0;
              for (var i = 0, ii = path.length; i < ii; i++) {
                  p = path[i];
                  if (p[0] == "M") {
                      x = +p[1];
                      y = +p[2];
                  } else {
                      l = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6]);
                      if (len + l > length) {
                          if (subpath && !subpaths.start) {
                              point = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6], length - len);
                              sp += [
                                  "C" + O(point.start.x),
                                  O(point.start.y),
                                  O(point.m.x),
                                  O(point.m.y),
                                  O(point.x),
                                  O(point.y)
                              ];
                              if (onlystart) {return sp;}
                              subpaths.start = sp;
                              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();
                              len += l;
                              x = +p[5];
                              y = +p[6];
                              continue;
                          }
                          if (!istotal && !subpath) {
                              point = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6], length - len);
                              return point;
                          }
                      }
                      len += l;
                      x = +p[5];
                      y = +p[6];
                  }
                  sp += p.shift() + p;
              }
              subpaths.end = sp;
              point = istotal ? len : subpath ? subpaths : findDotsAtSegment(x, y, p[0], p[1], p[2], p[3], p[4], p[5], 1);
              return point;
          }, null, Snap._.clone);
      }
      var getTotalLength = getLengthFactory(1),
          getPointAtLength = getLengthFactory(),
          getSubpathsAtLength = getLengthFactory(0, 1);
      function findDotsAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, t) {
          var t1 = 1 - t,
              t13 = pow(t1, 3),
              t12 = pow(t1, 2),
              t2 = t * t,
              t3 = t2 * t,
              x = t13 * p1x + t12 * 3 * t * c1x + t1 * 3 * t * t * c2x + t3 * p2x,
              y = t13 * p1y + t12 * 3 * t * c1y + t1 * 3 * t * t * c2y + t3 * p2y,
              mx = p1x + 2 * t * (c1x - p1x) + t2 * (c2x - 2 * c1x + p1x),
              my = p1y + 2 * t * (c1y - p1y) + t2 * (c2y - 2 * c1y + p1y),
              nx = c1x + 2 * t * (c2x - c1x) + t2 * (p2x - 2 * c2x + c1x),
              ny = c1y + 2 * t * (c2y - c1y) + t2 * (p2y - 2 * c2y + c1y),
              ax = t1 * p1x + t * c1x,
              ay = t1 * p1y + t * c1y,
              cx = t1 * c2x + t * p2x,
              cy = t1 * c2y + t * p2y,
              alpha = (90 - math.atan2(mx - nx, my - ny) * 180 / PI);
          // (mx > nx || my < ny) && (alpha += 180);
          return {
              x: x,
              y: y,
              m: {x: mx, y: my},
              n: {x: nx, y: ny},
              start: {x: ax, y: ay},
              end: {x: cx, y: cy},
              alpha: alpha
          };
      }
      function bezierBBox(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y) {
          if (!Snap.is(p1x, "array")) {
              p1x = [p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y];
          }
          var bbox = curveDim.apply(null, p1x);
          return box(
              bbox.min.x,
              bbox.min.y,
              bbox.max.x - bbox.min.x,
              bbox.max.y - bbox.min.y
          );
      }
      function isPointInsideBBox(bbox, x, y) {
          return  x >= bbox.x &&
                  x <= bbox.x + bbox.width &&
                  y >= bbox.y &&
                  y <= bbox.y + bbox.height;
      }
      function isBBoxIntersect(bbox1, bbox2) {
          bbox1 = box(bbox1);
          bbox2 = box(bbox2);
          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);
      }
      function base3(t, p1, p2, p3, p4) {
          var t1 = -3 * p1 + 9 * p2 - 9 * p3 + 3 * p4,
              t2 = t * t1 + 6 * p1 - 12 * p2 + 6 * p3;
          return t * t2 - 3 * p1 + 3 * p2;
      }
      function bezlen(x1, y1, x2, y2, x3, y3, x4, y4, z) {
          if (z == null) {
              z = 1;
          }
          z = z > 1 ? 1 : z < 0 ? 0 : z;
          var z2 = z / 2,
              n = 12,
              Tvalues = [-.1252,.1252,-.3678,.3678,-.5873,.5873,-.7699,.7699,-.9041,.9041,-.9816,.9816],
              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],
              sum = 0;
          for (var i = 0; i < n; i++) {
              var ct = z2 * Tvalues[i] + z2,
                  xbase = base3(ct, x1, x2, x3, x4),
                  ybase = base3(ct, y1, y2, y3, y4),
                  comb = xbase * xbase + ybase * ybase;
              sum += Cvalues[i] * math.sqrt(comb);
          }
          return z2 * sum;
      }
      function getTotLen(x1, y1, x2, y2, x3, y3, x4, y4, ll) {
          if (ll < 0 || bezlen(x1, y1, x2, y2, x3, y3, x4, y4) < ll) {
              return;
          }
          var t = 1,
              step = t / 2,
              t2 = t - step,
              l,
              e = .01;
          l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);
          while (abs(l - ll) > e) {
              step /= 2;
              t2 += (l < ll ? 1 : -1) * step;
              l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);
          }
          return t2;
      }
      function intersect(x1, y1, x2, y2, x3, y3, x4, y4) {
          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)
          ) {
              return;
          }
          var nx = (x1 * y2 - y1 * x2) * (x3 - x4) - (x1 - x2) * (x3 * y4 - y3 * x4),
              ny = (x1 * y2 - y1 * x2) * (y3 - y4) - (y1 - y2) * (x3 * y4 - y3 * x4),
              denominator = (x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4);
  
          if (!denominator) {
              return;
          }
          var px = nx / denominator,
              py = ny / denominator,
              px2 = +px.toFixed(2),
              py2 = +py.toFixed(2);
          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)
          ) {
              return;
          }
          return {x: px, y: py};
      }
      function inter(bez1, bez2) {
          return interHelper(bez1, bez2);
      }
      function interCount(bez1, bez2) {
          return interHelper(bez1, bez2, 1);
      }
      function interHelper(bez1, bez2, justCount) {
          var bbox1 = bezierBBox(bez1),
              bbox2 = bezierBBox(bez2);
          if (!isBBoxIntersect(bbox1, bbox2)) {
              return justCount ? 0 : [];
          }
          var l1 = bezlen.apply(0, bez1),
              l2 = bezlen.apply(0, bez2),
              n1 = ~~(l1 / 8),
              n2 = ~~(l2 / 8),
              dots1 = [],
              dots2 = [],
              xy = {},
              res = justCount ? 0 : [];
          for (var i = 0; i < n1 + 1; i++) {
              var p = findDotsAtSegment.apply(0, bez1.concat(i / n1));
              dots1.push({x: p.x, y: p.y, t: i / n1});
          }
          for (i = 0; i < n2 + 1; i++) {
              p = findDotsAtSegment.apply(0, bez2.concat(i / n2));
              dots2.push({x: p.x, y: p.y, t: i / n2});
          }
          for (i = 0; i < n1; i++) {
              for (var j = 0; j < n2; j++) {
                  var di = dots1[i],
                      di1 = dots1[i + 1],
                      dj = dots2[j],
                      dj1 = dots2[j + 1],
                      ci = abs(di1.x - di.x) < .001 ? "y" : "x",
                      cj = abs(dj1.x - dj.x) < .001 ? "y" : "x",
                      is = intersect(di.x, di.y, di1.x, di1.y, dj.x, dj.y, dj1.x, dj1.y);
                  if (is) {
                      if (xy[is.x.toFixed(4)] == is.y.toFixed(4)) {
                          continue;
                      }
                      xy[is.x.toFixed(4)] = is.y.toFixed(4);
                      var t1 = di.t + abs((is[ci] - di[ci]) / (di1[ci] - di[ci])) * (di1.t - di.t),
                          t2 = dj.t + abs((is[cj] - dj[cj]) / (dj1[cj] - dj[cj])) * (dj1.t - dj.t);
                      if (t1 >= 0 && t1 <= 1 && t2 >= 0 && t2 <= 1) {
                          if (justCount) {
                              res++;
                          } else {
                              res.push({
                                  x: is.x,
                                  y: is.y,
                                  t1: t1,
                                  t2: t2
                              });
                          }
                      }
                  }
              }
          }
          return res;
      }
      function pathIntersection(path1, path2) {
          return interPathHelper(path1, path2);
      }
      function pathIntersectionNumber(path1, path2) {
          return interPathHelper(path1, path2, 1);
      }
      function interPathHelper(path1, path2, justCount) {
          path1 = path2curve(path1);
          path2 = path2curve(path2);
          var x1, y1, x2, y2, x1m, y1m, x2m, y2m, bez1, bez2,
              res = justCount ? 0 : [];
          for (var i = 0, ii = path1.length; i < ii; i++) {
              var pi = path1[i];
              if (pi[0] == "M") {
                  x1 = x1m = pi[1];
                  y1 = y1m = pi[2];
              } else {
                  if (pi[0] == "C") {
                      bez1 = [x1, y1].concat(pi.slice(1));
                      x1 = bez1[6];
                      y1 = bez1[7];
                  } else {
                      bez1 = [x1, y1, x1, y1, x1m, y1m, x1m, y1m];
                      x1 = x1m;
                      y1 = y1m;
                  }
                  for (var j = 0, jj = path2.length; j < jj; j++) {
                      var pj = path2[j];
                      if (pj[0] == "M") {
                          x2 = x2m = pj[1];
                          y2 = y2m = pj[2];
                      } else {
                          if (pj[0] == "C") {
                              bez2 = [x2, y2].concat(pj.slice(1));
                              x2 = bez2[6];
                              y2 = bez2[7];
                          } else {
                              bez2 = [x2, y2, x2, y2, x2m, y2m, x2m, y2m];
                              x2 = x2m;
                              y2 = y2m;
                          }
                          var intr = interHelper(bez1, bez2, justCount);
                          if (justCount) {
                              res += intr;
                          } else {
                              for (var k = 0, kk = intr.length; k < kk; k++) {
                                  intr[k].segment1 = i;
                                  intr[k].segment2 = j;
                                  intr[k].bez1 = bez1;
                                  intr[k].bez2 = bez2;
                              }
                              res = res.concat(intr);
                          }
                      }
                  }
              }
          }
          return res;
      }
      function isPointInsidePath(path, x, y) {
          var bbox = pathBBox(path);
          return isPointInsideBBox(bbox, x, y) &&
                 interPathHelper(path, [["M", x, y], ["H", bbox.x2 + 10]], 1) % 2 == 1;
      }
      function pathBBox(path) {
          var pth = paths(path);
          if (pth.bbox) {
              return clone(pth.bbox);
          }
          if (!path) {
              return box();
          }
          path = path2curve(path);
          var x = 0, 
              y = 0,
              X = [],
              Y = [],
              p;
          for (var i = 0, ii = path.length; i < ii; i++) {
              p = path[i];
              if (p[0] == "M") {
                  x = p[1];
                  y = p[2];
                  X.push(x);
                  Y.push(y);
              } else {
                  var dim = curveDim(x, y, p[1], p[2], p[3], p[4], p[5], p[6]);
                  X = X.concat(dim.min.x, dim.max.x);
                  Y = Y.concat(dim.min.y, dim.max.y);
                  x = p[5];
                  y = p[6];
              }
          }
          var xmin = mmin.apply(0, X),
              ymin = mmin.apply(0, Y),
              xmax = mmax.apply(0, X),
              ymax = mmax.apply(0, Y),
              bb = box(xmin, ymin, xmax - xmin, ymax - ymin);
          pth.bbox = clone(bb);
          return bb;
      }
      function rectPath(x, y, w, h, r) {
          if (r) {
              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"]
              ];
          }
          var res = [["M", x, y], ["l", w, 0], ["l", 0, h], ["l", -w, 0], ["z"]];
          res.toString = toString;
          return res;
      }
      function ellipsePath(x, y, rx, ry, a) {
          if (a == null && ry == null) {
              ry = rx;
          }
          x = +x;
          y = +y;
          rx = +rx;
          ry = +ry;
          if (a != null) {
              var rad = Math.PI / 180,
                  x1 = x + rx * Math.cos(-ry * rad),
                  x2 = x + rx * Math.cos(-a * rad),
                  y1 = y + rx * Math.sin(-ry * rad),
                  y2 = y + rx * Math.sin(-a * rad),
                  res = [["M", x1, y1], ["A", rx, rx, 0, +(a - ry > 180), 0, x2, y2]];
          } else {
              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"]
              ];
          }
          res.toString = toString;
          return res;
      }
      var unit2px = Snap._unit2px,
          getPath = {
          path: function (el) {
              return el.attr("path");
          },
          circle: function (el) {
              var attr = unit2px(el);
              return ellipsePath(attr.cx, attr.cy, attr.r);
          },
          ellipse: function (el) {
              var attr = unit2px(el);
              return ellipsePath(attr.cx || 0, attr.cy || 0, attr.rx, attr.ry);
          },
          rect: function (el) {
              var attr = unit2px(el);
              return rectPath(attr.x || 0, attr.y || 0, attr.width, attr.height, attr.rx, attr.ry);
          },
          image: function (el) {
              var attr = unit2px(el);
              return rectPath(attr.x || 0, attr.y || 0, attr.width, attr.height);
          },
          line: function (el) {
              return "M" + [el.attr("x1") || 0, el.attr("y1") || 0, el.attr("x2"), el.attr("y2")];
          },
          polyline: function (el) {
              return "M" + el.attr("points");
          },
          polygon: function (el) {
              return "M" + el.attr("points") + "z";
          },
          deflt: function (el) {
              var bbox = el.node.getBBox();
              return rectPath(bbox.x, bbox.y, bbox.width, bbox.height);
          }
      };
      function pathToRelative(pathArray) {
          var pth = paths(pathArray),
              lowerCase = String.prototype.toLowerCase;
          if (pth.rel) {
              return pathClone(pth.rel);
          }
          if (!Snap.is(pathArray, "array") || !Snap.is(pathArray && pathArray[0], "array")) {
              pathArray = Snap.parsePathString(pathArray);
          }
          var res = [],
              x = 0,
              y = 0,
              mx = 0,
              my = 0,
              start = 0;
          if (pathArray[0][0] == "M") {
              x = pathArray[0][1];
              y = pathArray[0][2];
              mx = x;
              my = y;
              start++;
              res.push(["M", x, y]);
          }
          for (var i = start, ii = pathArray.length; i < ii; i++) {
              var r = res[i] = [],
                  pa = pathArray[i];
              if (pa[0] != lowerCase.call(pa[0])) {
                  r[0] = lowerCase.call(pa[0]);
                  switch (r[0]) {
                      case "a":
                          r[1] = pa[1];
                          r[2] = pa[2];
                          r[3] = pa[3];
                          r[4] = pa[4];
                          r[5] = pa[5];
                          r[6] = +(pa[6] - x).toFixed(3);
                          r[7] = +(pa[7] - y).toFixed(3);
                          break;
                      case "v":
                          r[1] = +(pa[1] - y).toFixed(3);
                          break;
                      case "m":
                          mx = pa[1];
                          my = pa[2];
                      default:
                          for (var j = 1, jj = pa.length; j < jj; j++) {
                              r[j] = +(pa[j] - ((j % 2) ? x : y)).toFixed(3);
                          }
                  }
              } else {
                  r = res[i] = [];
                  if (pa[0] == "m") {
                      mx = pa[1] + x;
                      my = pa[2] + y;
                  }
                  for (var k = 0, kk = pa.length; k < kk; k++) {
                      res[i][k] = pa[k];
                  }
              }
              var len = res[i].length;
              switch (res[i][0]) {
                  case "z":
                      x = mx;
                      y = my;
                      break;
                  case "h":
                      x += +res[i][len - 1];
                      break;
                  case "v":
                      y += +res[i][len - 1];
                      break;
                  default:
                      x += +res[i][len - 2];
                      y += +res[i][len - 1];
              }
          }
          res.toString = toString;
          pth.rel = pathClone(res);
          return res;
      }
      function pathToAbsolute(pathArray) {
          var pth = paths(pathArray);
          if (pth.abs) {
              return pathClone(pth.abs);
          }
          if (!is(pathArray, "array") || !is(pathArray && pathArray[0], "array")) { // rough assumption
              pathArray = Snap.parsePathString(pathArray);
          }
          if (!pathArray || !pathArray.length) {
              return [["M", 0, 0]];
          }
          var res = [],
              x = 0,
              y = 0,
              mx = 0,
              my = 0,
              start = 0,
              pa0;
          if (pathArray[0][0] == "M") {
              x = +pathArray[0][1];
              y = +pathArray[0][2];
              mx = x;
              my = y;
              start++;
              res[0] = ["M", x, y];
          }
          var crz = pathArray.length == 3 &&
              pathArray[0][0] == "M" &&
              pathArray[1][0].toUpperCase() == "R" &&
              pathArray[2][0].toUpperCase() == "Z";
          for (var r, pa, i = start, ii = pathArray.length; i < ii; i++) {
              res.push(r = []);
              pa = pathArray[i];
              pa0 = pa[0];
              if (pa0 != pa0.toUpperCase()) {
                  r[0] = pa0.toUpperCase();
                  switch (r[0]) {
                      case "A":
                          r[1] = pa[1];
                          r[2] = pa[2];
                          r[3] = pa[3];
                          r[4] = pa[4];
                          r[5] = pa[5];
                          r[6] = +pa[6] + x;
                          r[7] = +pa[7] + y;
                          break;
                      case "V":
                          r[1] = +pa[1] + y;
                          break;
                      case "H":
                          r[1] = +pa[1] + x;
                          break;
                      case "R":
                          var dots = [x, y].concat(pa.slice(1));
                          for (var j = 2, jj = dots.length; j < jj; j++) {
                              dots[j] = +dots[j] + x;
                              dots[++j] = +dots[j] + y;
                          }
                          res.pop();
                          res = res.concat(catmullRom2bezier(dots, crz));
                          break;
                      case "O":
                          res.pop();
                          dots = ellipsePath(x, y, pa[1], pa[2]);
                          dots.push(dots[0]);
                          res = res.concat(dots);
                          break;
                      case "U":
                          res.pop();
                          res = res.concat(ellipsePath(x, y, pa[1], pa[2], pa[3]));
                          r = ["U"].concat(res[res.length - 1].slice(-2));
                          break;
                      case "M":
                          mx = +pa[1] + x;
                          my = +pa[2] + y;
                      default:
                          for (j = 1, jj = pa.length; j < jj; j++) {
                              r[j] = +pa[j] + ((j % 2) ? x : y);
                          }
                  }
              } else if (pa0 == "R") {
                  dots = [x, y].concat(pa.slice(1));
                  res.pop();
                  res = res.concat(catmullRom2bezier(dots, crz));
                  r = ["R"].concat(pa.slice(-2));
              } else if (pa0 == "O") {
                  res.pop();
                  dots = ellipsePath(x, y, pa[1], pa[2]);
                  dots.push(dots[0]);
                  res = res.concat(dots);
              } else if (pa0 == "U") {
                  res.pop();
                  res = res.concat(ellipsePath(x, y, pa[1], pa[2], pa[3]));
                  r = ["U"].concat(res[res.length - 1].slice(-2));
              } else {
                  for (var k = 0, kk = pa.length; k < kk; k++) {
                      r[k] = pa[k];
                  }
              }
              pa0 = pa0.toUpperCase();
              if (pa0 != "O") {
                  switch (r[0]) {
                      case "Z":
                          x = +mx;
                          y = +my;
                          break;
                      case "H":
                          x = r[1];
                          break;
                      case "V":
                          y = r[1];
                          break;
                      case "M":
                          mx = r[r.length - 2];
                          my = r[r.length - 1];
                      default:
                          x = r[r.length - 2];
                          y = r[r.length - 1];
                  }
              }
          }
          res.toString = toString;
          pth.abs = pathClone(res);
          return res;
      }
      function l2c(x1, y1, x2, y2) {
          return [x1, y1, x2, y2, x2, y2];
      }
      function q2c(x1, y1, ax, ay, x2, y2) {
          var _13 = 1 / 3,
              _23 = 2 / 3;
          return [
                  _13 * x1 + _23 * ax,
                  _13 * y1 + _23 * ay,
                  _13 * x2 + _23 * ax,
                  _13 * y2 + _23 * ay,
                  x2,
                  y2
              ];
      }
      function a2c(x1, y1, rx, ry, angle, large_arc_flag, sweep_flag, x2, y2, recursive) {
          // for more information of where this math came from visit:
          // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
          var _120 = PI * 120 / 180,
              rad = PI / 180 * (+angle || 0),
              res = [],
              xy,
              rotate = Snap._.cacher(function (x, y, rad) {
                  var X = x * math.cos(rad) - y * math.sin(rad),
                      Y = x * math.sin(rad) + y * math.cos(rad);
                  return {x: X, y: Y};
              });
          if (!recursive) {
              xy = rotate(x1, y1, -rad);
              x1 = xy.x;
              y1 = xy.y;
              xy = rotate(x2, y2, -rad);
              x2 = xy.x;
              y2 = xy.y;
              var cos = math.cos(PI / 180 * angle),
                  sin = math.sin(PI / 180 * angle),
                  x = (x1 - x2) / 2,
                  y = (y1 - y2) / 2;
              var h = (x * x) / (rx * rx) + (y * y) / (ry * ry);
              if (h > 1) {
                  h = math.sqrt(h);
                  rx = h * rx;
                  ry = h * ry;
              }
              var rx2 = rx * rx,
                  ry2 = ry * ry,
                  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))),
                  cx = k * rx * y / ry + (x1 + x2) / 2,
                  cy = k * -ry * x / rx + (y1 + y2) / 2,
                  f1 = math.asin(((y1 - cy) / ry).toFixed(9)),
                  f2 = math.asin(((y2 - cy) / ry).toFixed(9));
  
              f1 = x1 < cx ? PI - f1 : f1;
              f2 = x2 < cx ? PI - f2 : f2;
              f1 < 0 && (f1 = PI * 2 + f1);
              f2 < 0 && (f2 = PI * 2 + f2);
              if (sweep_flag && f1 > f2) {
                  f1 = f1 - PI * 2;
              }
              if (!sweep_flag && f2 > f1) {
                  f2 = f2 - PI * 2;
              }
          } else {
              f1 = recursive[0];
              f2 = recursive[1];
              cx = recursive[2];
              cy = recursive[3];
          }
          var df = f2 - f1;
          if (abs(df) > _120) {
              var f2old = f2,
                  x2old = x2,
                  y2old = y2;
              f2 = f1 + _120 * (sweep_flag && f2 > f1 ? 1 : -1);
              x2 = cx + rx * math.cos(f2);
              y2 = cy + ry * math.sin(f2);
              res = a2c(x2, y2, rx, ry, angle, 0, sweep_flag, x2old, y2old, [f2, f2old, cx, cy]);
          }
          df = f2 - f1;
          var c1 = math.cos(f1),
              s1 = math.sin(f1),
              c2 = math.cos(f2),
              s2 = math.sin(f2),
              t = math.tan(df / 4),
              hx = 4 / 3 * rx * t,
              hy = 4 / 3 * ry * t,
              m1 = [x1, y1],
              m2 = [x1 + hx * s1, y1 - hy * c1],
              m3 = [x2 + hx * s2, y2 - hy * c2],
              m4 = [x2, y2];
          m2[0] = 2 * m1[0] - m2[0];
          m2[1] = 2 * m1[1] - m2[1];
          if (recursive) {
              return [m2, m3, m4].concat(res);
          } else {
              res = [m2, m3, m4].concat(res).join().split(",");
              var newres = [];
              for (var i = 0, ii = res.length; i < ii; i++) {
                  newres[i] = i % 2 ? rotate(res[i - 1], res[i], rad).y : rotate(res[i], res[i + 1], rad).x;
              }
              return newres;
          }
      }
      function findDotAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, t) {
          var t1 = 1 - t;
          return {
              x: pow(t1, 3) * p1x + pow(t1, 2) * 3 * t * c1x + t1 * 3 * t * t * c2x + pow(t, 3) * p2x,
              y: pow(t1, 3) * p1y + pow(t1, 2) * 3 * t * c1y + t1 * 3 * t * t * c2y + pow(t, 3) * p2y
          };
      }
      
      // Returns bounding box of cubic bezier curve.
      // Source: http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
      // Original version: NISHIO Hirokazu
      // Modifications: https://github.com/timo22345
      function curveDim(x0, y0, x1, y1, x2, y2, x3, y3) {
          var tvalues = [],
              bounds = [[], []],
              a, b, c, t, t1, t2, b2ac, sqrtb2ac;
          for (var i = 0; i < 2; ++i) {
              if (i == 0) {
                  b = 6 * x0 - 12 * x1 + 6 * x2;
                  a = -3 * x0 + 9 * x1 - 9 * x2 + 3 * x3;
                  c = 3 * x1 - 3 * x0;
              } else {
                  b = 6 * y0 - 12 * y1 + 6 * y2;
                  a = -3 * y0 + 9 * y1 - 9 * y2 + 3 * y3;
                  c = 3 * y1 - 3 * y0;
              }
              if (abs(a) < 1e-12) {
                  if (abs(b) < 1e-12) {
                      continue;
                  }
                  t = -c / b;
                  if (0 < t && t < 1) {
                      tvalues.push(t);
                  }
                  continue;
              }
              b2ac = b * b - 4 * c * a;
              sqrtb2ac = math.sqrt(b2ac);
              if (b2ac < 0) {
                  continue;
              }
              t1 = (-b + sqrtb2ac) / (2 * a);
              if (0 < t1 && t1 < 1) {
                  tvalues.push(t1);
              }
              t2 = (-b - sqrtb2ac) / (2 * a);
              if (0 < t2 && t2 < 1) {
                  tvalues.push(t2);
              }
          }
  
          var x, y, j = tvalues.length,
              jlen = j,
              mt;
          while (j--) {
              t = tvalues[j];
              mt = 1 - t;
              bounds[0][j] = (mt * mt * mt * x0) + (3 * mt * mt * t * x1) + (3 * mt * t * t * x2) + (t * t * t * x3);
              bounds[1][j] = (mt * mt * mt * y0) + (3 * mt * mt * t * y1) + (3 * mt * t * t * y2) + (t * t * t * y3);
          }
  
          bounds[0][jlen] = x0;
          bounds[1][jlen] = y0;
          bounds[0][jlen + 1] = x3;
          bounds[1][jlen + 1] = y3;
          bounds[0].length = bounds[1].length = jlen + 2;
  
  
          return {
            min: {x: mmin.apply(0, bounds[0]), y: mmin.apply(0, bounds[1])},
            max: {x: mmax.apply(0, bounds[0]), y: mmax.apply(0, bounds[1])}
          };
      }
  
      function path2curve(path, path2) {
          var pth = !path2 && paths(path);
          if (!path2 && pth.curve) {
              return pathClone(pth.curve);
          }
          var p = pathToAbsolute(path),
              p2 = path2 && pathToAbsolute(path2),
              attrs = {x: 0, y: 0, bx: 0, by: 0, X: 0, Y: 0, qx: null, qy: null},
              attrs2 = {x: 0, y: 0, bx: 0, by: 0, X: 0, Y: 0, qx: null, qy: null},
              processPath = function (path, d, pcom) {
                  var nx, ny;
                  if (!path) {
                      return ["C", d.x, d.y, d.x, d.y, d.x, d.y];
                  }
                  !(path[0] in {T: 1, Q: 1}) && (d.qx = d.qy = null);
                  switch (path[0]) {
                      case "M":
                          d.X = path[1];
                          d.Y = path[2];
                          break;
                      case "A":
                          path = ["C"].concat(a2c.apply(0, [d.x, d.y].concat(path.slice(1))));
                          break;
                      case "S":
                          if (pcom == "C" || pcom == "S") { // In "S" case we have to take into account, if the previous command is C/S.
                              nx = d.x * 2 - d.bx;          // And reflect the previous
                              ny = d.y * 2 - d.by;          // command's control point relative to the current point.
                          }
                          else {                            // or some else or nothing
                              nx = d.x;
                              ny = d.y;
                          }
                          path = ["C", nx, ny].concat(path.slice(1));
                          break;
                      case "T":
                          if (pcom == "Q" || pcom == "T") { // In "T" case we have to take into account, if the previous command is Q/T.
                              d.qx = d.x * 2 - d.qx;        // And make a reflection similar
                              d.qy = d.y * 2 - d.qy;        // to case "S".
                          }
                          else {                            // or something else or nothing
                              d.qx = d.x;
                              d.qy = d.y;
                          }
                          path = ["C"].concat(q2c(d.x, d.y, d.qx, d.qy, path[1], path[2]));
                          break;
                      case "Q":
                          d.qx = path[1];
                          d.qy = path[2];
                          path = ["C"].concat(q2c(d.x, d.y, path[1], path[2], path[3], path[4]));
                          break;
                      case "L":
                          path = ["C"].concat(l2c(d.x, d.y, path[1], path[2]));
                          break;
                      case "H":
                          path = ["C"].concat(l2c(d.x, d.y, path[1], d.y));
                          break;
                      case "V":
                          path = ["C"].concat(l2c(d.x, d.y, d.x, path[1]));
                          break;
                      case "Z":
                          path = ["C"].concat(l2c(d.x, d.y, d.X, d.Y));
                          break;
                  }
                  return path;
              },
              fixArc = function (pp, i) {
                  if (pp[i].length > 7) {
                      pp[i].shift();
                      var pi = pp[i];
                      while (pi.length) {
                          pcoms1[i] = "A"; // if created multiple C:s, their original seg is saved
                          p2 && (pcoms2[i] = "A"); // the same as above
                          pp.splice(i++, 0, ["C"].concat(pi.splice(0, 6)));
                      }
                      pp.splice(i, 1);
                      ii = mmax(p.length, p2 && p2.length || 0);
                  }
              },
              fixM = function (path1, path2, a1, a2, i) {
                  if (path1 && path2 && path1[i][0] == "M" && path2[i][0] != "M") {
                      path2.splice(i, 0, ["M", a2.x, a2.y]);
                      a1.bx = 0;
                      a1.by = 0;
                      a1.x = path1[i][1];
                      a1.y = path1[i][2];
                      ii = mmax(p.length, p2 && p2.length || 0);
                  }
              },
              pcoms1 = [], // path commands of original path p
              pcoms2 = [], // path commands of original path p2
              pfirst = "", // temporary holder for original path command
              pcom = ""; // holder for previous path command of original path
          for (var i = 0, ii = mmax(p.length, p2 && p2.length || 0); i < ii; i++) {
              p[i] && (pfirst = p[i][0]); // save current path command
  
              if (pfirst != "C") // C is not saved yet, because it may be result of conversion
              {
                  pcoms1[i] = pfirst; // Save current path command
                  i && ( pcom = pcoms1[i - 1]); // Get previous path command pcom
              }
              p[i] = processPath(p[i], attrs, pcom); // Previous path command is inputted to processPath
  
              if (pcoms1[i] != "A" && pfirst == "C") pcoms1[i] = "C"; // A is the only command
              // which may produce multiple C:s
              // so we have to make sure that C is also C in original path
  
              fixArc(p, i); // fixArc adds also the right amount of A:s to pcoms1
  
              if (p2) { // the same procedures is done to p2
                  p2[i] && (pfirst = p2[i][0]);
                  if (pfirst != "C") {
                      pcoms2[i] = pfirst;
                      i && (pcom = pcoms2[i - 1]);
                  }
                  p2[i] = processPath(p2[i], attrs2, pcom);
  
                  if (pcoms2[i] != "A" && pfirst == "C") {
                      pcoms2[i] = "C";
                  }
  
                  fixArc(p2, i);
              }
              fixM(p, p2, attrs, attrs2, i);
              fixM(p2, p, attrs2, attrs, i);
              var seg = p[i],
                  seg2 = p2 && p2[i],
                  seglen = seg.length,
                  seg2len = p2 && seg2.length;
              attrs.x = seg[seglen - 2];
              attrs.y = seg[seglen - 1];
              attrs.bx = toFloat(seg[seglen - 4]) || attrs.x;
              attrs.by = toFloat(seg[seglen - 3]) || attrs.y;
              attrs2.bx = p2 && (toFloat(seg2[seg2len - 4]) || attrs2.x);
              attrs2.by = p2 && (toFloat(seg2[seg2len - 3]) || attrs2.y);
              attrs2.x = p2 && seg2[seg2len - 2];
              attrs2.y = p2 && seg2[seg2len - 1];
          }
          if (!p2) {
              pth.curve = pathClone(p);
          }
          return p2 ? [p, p2] : p;
      }
      function mapPath(path, matrix) {
          if (!matrix) {
              return path;
          }
          var x, y, i, j, ii, jj, pathi;
          path = path2curve(path);
          for (i = 0, ii = path.length; i < ii; i++) {
              pathi = path[i];
              for (j = 1, jj = pathi.length; j < jj; j += 2) {
                  x = matrix.x(pathi[j], pathi[j + 1]);
                  y = matrix.y(pathi[j], pathi[j + 1]);
                  pathi[j] = x;
                  pathi[j + 1] = y;
              }
          }
          return path;
      }
  
      // http://schepers.cc/getting-to-the-point
      function catmullRom2bezier(crp, z) {
          var d = [];
          for (var i = 0, iLen = crp.length; iLen - 2 * !z > i; i += 2) {
              var p = [
                          {x: +crp[i - 2], y: +crp[i - 1]},
                          {x: +crp[i],     y: +crp[i + 1]},
                          {x: +crp[i + 2], y: +crp[i + 3]},
                          {x: +crp[i + 4], y: +crp[i + 5]}
                      ];
              if (z) {
                  if (!i) {
                      p[0] = {x: +crp[iLen - 2], y: +crp[iLen - 1]};
                  } else if (iLen - 4 == i) {
                      p[3] = {x: +crp[0], y: +crp[1]};
                  } else if (iLen - 2 == i) {
                      p[2] = {x: +crp[0], y: +crp[1]};
                      p[3] = {x: +crp[2], y: +crp[3]};
                  }
              } else {
                  if (iLen - 4 == i) {
                      p[3] = p[2];
                  } else if (!i) {
                      p[0] = {x: +crp[i], y: +crp[i + 1]};
                  }
              }
              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
              ]);
          }
  
          return d;
      }
  
      // export
      Snap.path = paths;
  
      /*\
       * Snap.path.getTotalLength
       [ method ]
       **
       * Returns the length of the given path in pixels
       **
       - path (string) SVG path string
       **
       = (number) length
      \*/
      Snap.path.getTotalLength = getTotalLength;
      /*\
       * Snap.path.getPointAtLength
       [ method ]
       **
       * Returns the coordinates of the point located at the given length along the given path
       **
       - path (string) SVG path string
       - length (number) length, in pixels, from the start of the path, excluding non-rendering jumps
       **
       = (object) representation of the point:
       o {
       o     x: (number) x coordinate,
       o     y: (number) y coordinate,
       o     alpha: (number) angle of derivative
       o }
      \*/
      Snap.path.getPointAtLength = getPointAtLength;
      /*\
       * Snap.path.getSubpath
       [ method ]
       **
       * Returns the subpath of a given path between given start and end lengths
       **
       - path (string) SVG path string
       - from (number) length, in pixels, from the start of the path to the start of the segment
       - to (number) length, in pixels, from the start of the path to the end of the segment
       **
       = (string) path string definition for the segment
      \*/
      Snap.path.getSubpath = function (path, from, to) {
          if (this.getTotalLength(path) - to < 1e-6) {
              return getSubpathsAtLength(path, from).end;
          }
          var a = getSubpathsAtLength(path, to, 1);
          return from ? getSubpathsAtLength(a, from).end : a;
      };
      /*\
       * Element.getTotalLength
       [ method ]
       **
       * Returns the length of the path in pixels (only works for `path` elements)
       = (number) length
      \*/
      elproto.getTotalLength = function () {
          if (this.node.getTotalLength) {
              return this.node.getTotalLength();
          }
      };
      // 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?
      /*\
       * Element.getPointAtLength
       [ method ]
       **
       * Returns coordinates of the point located at the given length on the given path (only works for `path` elements)
       **
       - length (number) length, in pixels, from the start of the path, excluding non-rendering jumps
       **
       = (object) representation of the point:
       o {
       o     x: (number) x coordinate,
       o     y: (number) y coordinate,
       o     alpha: (number) angle of derivative
       o }
      \*/
      elproto.getPointAtLength = function (length) {
          return getPointAtLength(this.attr("d"), length);
      };
      // 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.
      /*\
       * Element.getSubpath
       [ method ]
       **
       * Returns subpath of a given element from given start and end lengths (only works for `path` elements)
       **
       - from (number) length, in pixels, from the start of the path to the start of the segment
       - to (number) length, in pixels, from the start of the path to the end of the segment
       **
       = (string) path string definition for the segment
      \*/
      elproto.getSubpath = function (from, to) {
          return Snap.path.getSubpath(this.attr("d"), from, to);
      };
      Snap._.box = box;
      /*\
       * Snap.path.findDotsAtSegment
       [ method ]
       **
       * Utility method
       **
       * Finds dot coordinates on the given cubic beziér curve at the given t
       - p1x (number) x of the first point of the curve
       - p1y (number) y of the first point of the curve
       - c1x (number) x of the first anchor of the curve
       - c1y (number) y of the first anchor of the curve
       - c2x (number) x of the second anchor of the curve
       - c2y (number) y of the second anchor of the curve
       - p2x (number) x of the second point of the curve
       - p2y (number) y of the second point of the curve
       - t (number) position on the curve (0..1)
       = (object) point information in format:
       o {
       o     x: (number) x coordinate of the point,
       o     y: (number) y coordinate of the point,
       o     m: {
       o         x: (number) x coordinate of the left anchor,
       o         y: (number) y coordinate of the left anchor
       o     },
       o     n: {
       o         x: (number) x coordinate of the right anchor,
       o         y: (number) y coordinate of the right anchor
       o     },
       o     start: {
       o         x: (number) x coordinate of the start of the curve,
       o         y: (number) y coordinate of the start of the curve
       o     },
       o     end: {
       o         x: (number) x coordinate of the end of the curve,
       o         y: (number) y coordinate of the end of the curve
       o     },
       o     alpha: (number) angle of the curve derivative at the point
       o }
      \*/
      Snap.path.findDotsAtSegment = findDotsAtSegment;
      /*\
       * Snap.path.bezierBBox
       [ method ]
       **
       * Utility method
       **
       * Returns the bounding box of a given cubic beziér curve
       - p1x (number) x of the first point of the curve
       - p1y (number) y of the first point of the curve
       - c1x (number) x of the first anchor of the curve
       - c1y (number) y of the first anchor of the curve
       - c2x (number) x of the second anchor of the curve
       - c2y (number) y of the second anchor of the curve
       - p2x (number) x of the second point of the curve
       - p2y (number) y of the second point of the curve
       * or
       - bez (array) array of six points for beziér curve
       = (object) bounding box
       o {
       o     x: (number) x coordinate of the left top point of the box,
       o     y: (number) y coordinate of the left top point of the box,
       o     x2: (number) x coordinate of the right bottom point of the box,
       o     y2: (number) y coordinate of the right bottom point of the box,
       o     width: (number) width of the box,
       o     height: (number) height of the box
       o }
      \*/
      Snap.path.bezierBBox = bezierBBox;
      /*\
       * Snap.path.isPointInsideBBox
       [ method ]
       **
       * Utility method
       **
       * Returns `true` if given point is inside bounding box
       - bbox (string) bounding box
       - x (string) x coordinate of the point
       - y (string) y coordinate of the point
       = (boolean) `true` if point is inside
      \*/
      Snap.path.isPointInsideBBox = isPointInsideBBox;
      Snap.closest = function (x, y, X, Y) {
          var r = 100,
              b = box(x - r / 2, y - r / 2, r, r),
              inside = [],
              getter = X[0].hasOwnProperty("x") ? function (i) {
                  return {
                      x: X[i].x,
                      y: X[i].y
                  };
              } : function (i) {
                  return {
                      x: X[i],
                      y: Y[i]
                  };
              },
              found = 0;
          while (r <= 1e6 && !found) {
              for (var i = 0, ii = X.length; i < ii; i++) {
                  var xy = getter(i);
                  if (isPointInsideBBox(b, xy.x, xy.y)) {
                      found++;
                      inside.push(xy);
                      break;
                  }
              }
              if (!found) {
                  r *= 2;
                  b = box(x - r / 2, y - r / 2, r, r)
              }
          }
          if (r == 1e6) {
              return;
          }
          var len = Infinity,
              res;
          for (i = 0, ii = inside.length; i < ii; i++) {
              var l = Snap.len(x, y, inside[i].x, inside[i].y);
              if (len > l) {
                  len = l;
                  inside[i].len = l;
                  res = inside[i];
              }
          }
          return res;
      };
      /*\
       * Snap.path.isBBoxIntersect
       [ method ]
       **
       * Utility method
       **
       * Returns `true` if two bounding boxes intersect
       - bbox1 (string) first bounding box
       - bbox2 (string) second bounding box
       = (boolean) `true` if bounding boxes intersect
      \*/
      Snap.path.isBBoxIntersect = isBBoxIntersect;
      /*\
       * Snap.path.intersection
       [ method ]
       **
       * Utility method
       **
       * Finds intersections of two paths
       - path1 (string) path string
       - path2 (string) path string
       = (array) dots of intersection
       o [
       o     {
       o         x: (number) x coordinate of the point,
       o         y: (number) y coordinate of the point,
       o         t1: (number) t value for segment of path1,
       o         t2: (number) t value for segment of path2,
       o         segment1: (number) order number for segment of path1,
       o         segment2: (number) order number for segment of path2,
       o         bez1: (array) eight coordinates representing beziér curve for the segment of path1,
       o         bez2: (array) eight coordinates representing beziér curve for the segment of path2
       o     }
       o ]
      \*/
      Snap.path.intersection = pathIntersection;
      Snap.path.intersectionNumber = pathIntersectionNumber;
      /*\
       * Snap.path.isPointInside
       [ method ]
       **
       * Utility method
       **
       * Returns `true` if given point is inside a given closed path.
       *
       * Note: fill mode doesn’t affect the result of this method.
       - path (string) path string
       - x (number) x of the point
       - y (number) y of the point
       = (boolean) `true` if point is inside the path
      \*/
      Snap.path.isPointInside = isPointInsidePath;
      /*\
       * Snap.path.getBBox
       [ method ]
       **
       * Utility method
       **
       * Returns the bounding box of a given path
       - path (string) path string
       = (object) bounding box
       o {
       o     x: (number) x coordinate of the left top point of the box,
       o     y: (number) y coordinate of the left top point of the box,
       o     x2: (number) x coordinate of the right bottom point of the box,
       o     y2: (number) y coordinate of the right bottom point of the box,
       o     width: (number) width of the box,
       o     height: (number) height of the box
       o }
      \*/
      Snap.path.getBBox = pathBBox;
      Snap.path.get = getPath;
      /*\
       * Snap.path.toRelative
       [ method ]
       **
       * Utility method
       **
       * Converts path coordinates into relative values
       - path (string) path string
       = (array) path string
      \*/
      Snap.path.toRelative = pathToRelative;
      /*\
       * Snap.path.toAbsolute
       [ method ]
       **
       * Utility method
       **
       * Converts path coordinates into absolute values
       - path (string) path string
       = (array) path string
      \*/
      Snap.path.toAbsolute = pathToAbsolute;
      /*\
       * Snap.path.toCubic
       [ method ]
       **
       * Utility method
       **
       * Converts path to a new path where all segments are cubic beziér curves
       - pathString (string|array) path string or array of segments
       = (array) array of segments
      \*/
      Snap.path.toCubic = path2curve;
      /*\
       * Snap.path.map
       [ method ]
       **
       * Transform the path string with the given matrix
       - path (string) path string
       - matrix (object) see @Matrix
       = (string) transformed path string
      \*/
      Snap.path.map = mapPath;
      Snap.path.toString = toString;
      Snap.path.clone = pathClone;
  });
  
  // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // 
  // http://www.apache.org/licenses/LICENSE-2.0
  // 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  Snap.plugin(function (Snap, Element, Paper, glob) {
      var mmax = Math.max,
          mmin = Math.min;
  
      // Set
      var Set = function (items) {
          this.items = [];
  	this.bindings = {};
          this.length = 0;
          this.type = "set";
          if (items) {
              for (var i = 0, ii = items.length; i < ii; i++) {
                  if (items[i]) {
                      this[this.items.length] = this.items[this.items.length] = items[i];
                      this.length++;
                  }
              }
          }
      },
      setproto = Set.prototype;
      /*\
       * Set.push
       [ method ]
       **
       * Adds each argument to the current set
       = (object) original element
      \*/
      setproto.push = function () {
          var item,
              len;
          for (var i = 0, ii = arguments.length; i < ii; i++) {
              item = arguments[i];
              if (item) {
                  len = this.items.length;
                  this[len] = this.items[len] = item;
                  this.length++;
              }
          }
          return this;
      };
      /*\
       * Set.pop
       [ method ]
       **
       * Removes last element and returns it
       = (object) element
      \*/
      setproto.pop = function () {
          this.length && delete this[this.length--];
          return this.items.pop();
      };
      /*\
       * Set.forEach
       [ method ]
       **
       * Executes given function for each element in the set
       *
       * If the function returns `false`, the loop stops running.
       **
       - callback (function) function to run
       - thisArg (object) context object for the callback
       = (object) Set object
      \*/
      setproto.forEach = function (callback, thisArg) {
          for (var i = 0, ii = this.items.length; i < ii; i++) {
              if (callback.call(thisArg, this.items[i], i) === false) {
                  return this;
              }
          }
          return this;
      };
      /*\
       * Set.animate
       [ method ]
       **
       * Animates each element in set in sync.
       *
       **
       - attrs (object) key-value pairs of destination attributes
       - duration (number) duration of the animation in milliseconds
       - easing (function) #optional easing function from @mina or custom
       - callback (function) #optional callback function that executes when the animation ends
       * or
       - animation (array) array of animation parameter for each element in set in format `[attrs, duration, easing, callback]`
       > Usage
       | // animate all elements in set to radius 10
       | set.animate({r: 10}, 500, mina.easein);
       | // or
       | // animate first element to radius 10, but second to radius 20 and in different time
       | set.animate([{r: 10}, 500, mina.easein], [{r: 20}, 1500, mina.easein]);
       = (Element) the current element
      \*/
      setproto.animate = function (attrs, ms, easing, callback) {
          if (typeof easing == "function" && !easing.length) {
              callback = easing;
              easing = mina.linear;
          }
          if (attrs instanceof Snap._.Animation) {
              callback = attrs.callback;
              easing = attrs.easing;
              ms = easing.dur;
              attrs = attrs.attr;
          }
          var args = arguments;
          if (Snap.is(attrs, "array") && Snap.is(args[args.length - 1], "array")) {
              var each = true;
          }
          var begin,
              handler = function () {
                  if (begin) {
                      this.b = begin;
                  } else {
                      begin = this.b;
                  }
              },
              cb = 0,
              set = this,
              callbacker = callback && function () {
                  if (++cb == set.length) {
                      callback.call(this);
                  }
              };
          return this.forEach(function (el, i) {
              eve.once("snap.animcreated." + el.id, handler);
              if (each) {
                  args[i] && el.animate.apply(el, args[i]);
              } else {
                  el.animate(attrs, ms, easing, callbacker);
              }
          });
      };
      setproto.remove = function () {
          while (this.length) {
              this.pop().remove();
          }
          return this;
      };
      /*\
       * Set.bind
       [ method ]
       **
       * Specifies how to handle a specific attribute when applied
       * to a set.
       *
       **
       - attr (string) attribute name
       - callback (function) function to run
       * or
       - attr (string) attribute name
       - element (Element) specific element in the set to apply the attribute to
       * or
       - attr (string) attribute name
       - element (Element) specific element in the set to apply the attribute to
       - eattr (string) attribute on the element to bind the attribute to
       = (object) Set object
      \*/
      setproto.bind = function (attr, a, b) {
          var data = {};
          if (typeof a == "function") {
              this.bindings[attr] = a;
          } else {
              var aname = b || attr;
              this.bindings[attr] = function (v) {
                  data[aname] = v;
                  a.attr(data);
              };
          }
          return this;
      };
      setproto.attr = function (value) {
          var unbound = {};
          for (var k in value) {
              if (this.bindings[k]) {
                  this.bindings[k](value[k]);
              } else {
                  unbound[k] = value[k];
              }
          }
          for (var i = 0, ii = this.items.length; i < ii; i++) {
              this.items[i].attr(unbound);
          }
          return this;
      };
      /*\
       * Set.clear
       [ method ]
       **
       * Removes all elements from the set
      \*/
      setproto.clear = function () {
          while (this.length) {
              this.pop();
          }
      };
      /*\
       * Set.splice
       [ method ]
       **
       * Removes range of elements from the set
       **
       - index (number) position of the deletion
       - count (number) number of element to remove
       - insertion… (object) #optional elements to insert
       = (object) set elements that were deleted
      \*/
      setproto.splice = function (index, count, insertion) {
          index = index < 0 ? mmax(this.length + index, 0) : index;
          count = mmax(0, mmin(this.length - index, count));
          var tail = [],
              todel = [],
              args = [],
              i;
          for (i = 2; i < arguments.length; i++) {
              args.push(arguments[i]);
          }
          for (i = 0; i < count; i++) {
              todel.push(this[index + i]);
          }
          for (; i < this.length - index; i++) {
              tail.push(this[index + i]);
          }
          var arglen = args.length;
          for (i = 0; i < arglen + tail.length; i++) {
              this.items[index + i] = this[index + i] = i < arglen ? args[i] : tail[i - arglen];
          }
          i = this.items.length = this.length -= count - arglen;
          while (this[i]) {
              delete this[i++];
          }
          return new Set(todel);
      };
      /*\
       * Set.exclude
       [ method ]
       **
       * Removes given element from the set
       **
       - element (object) element to remove
       = (boolean) `true` if object was found and removed from the set
      \*/
      setproto.exclude = function (el) {
          for (var i = 0, ii = this.length; i < ii; i++) if (this[i] == el) {
              this.splice(i, 1);
              return true;
          }
          return false;
      };
      setproto.insertAfter = function (el) {
          var i = this.items.length;
          while (i--) {
              this.items[i].insertAfter(el);
          }
          return this;
      };
      setproto.getBBox = function () {
          var x = [],
              y = [],
              x2 = [],
              y2 = [];
          for (var i = this.items.length; i--;) if (!this.items[i].removed) {
              var box = this.items[i].getBBox();
              x.push(box.x);
              y.push(box.y);
              x2.push(box.x + box.width);
              y2.push(box.y + box.height);
          }
          x = mmin.apply(0, x);
          y = mmin.apply(0, y);
          x2 = mmax.apply(0, x2);
          y2 = mmax.apply(0, y2);
          return {
              x: x,
              y: y,
              x2: x2,
              y2: y2,
              width: x2 - x,
              height: y2 - y,
              cx: x + (x2 - x) / 2,
              cy: y + (y2 - y) / 2
          };
      };
      setproto.clone = function (s) {
          s = new Set;
          for (var i = 0, ii = this.items.length; i < ii; i++) {
              s.push(this.items[i].clone());
          }
          return s;
      };
      setproto.toString = function () {
          return "Snap\u2018s set";
      };
      setproto.type = "set";
      // export
      Snap.Set = Set;
      Snap.set = function () {
          var set = new Set;
          if (arguments.length) {
              set.push.apply(set, Array.prototype.slice.call(arguments, 0));
          }
          return set;
      };
  });
  
  // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // 
  // http://www.apache.org/licenses/LICENSE-2.0
  // 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  Snap.plugin(function (Snap, Element, Paper, glob) {
      var names = {},
          reUnit = /[a-z]+$/i,
          Str = String;
      names.stroke = names.fill = "colour";
      function getEmpty(item) {
          var l = item[0];
          switch (l.toLowerCase()) {
              case "t": return [l, 0, 0];
              case "m": return [l, 1, 0, 0, 1, 0, 0];
              case "r": if (item.length == 4) {
                  return [l, 0, item[2], item[3]];
              } else {
                  return [l, 0];
              }
              case "s": if (item.length == 5) {
                  return [l, 1, 1, item[3], item[4]];
              } else if (item.length == 3) {
                  return [l, 1, 1];
              } else {
                  return [l, 1];
              }
          }
      }
      function equaliseTransform(t1, t2, getBBox) {
          t2 = Str(t2).replace(/\.{3}|\u2026/g, t1);
          t1 = Snap.parseTransformString(t1) || [];
          t2 = Snap.parseTransformString(t2) || [];
          var maxlength = Math.max(t1.length, t2.length),
              from = [],
              to = [],
              i = 0, j, jj,
              tt1, tt2;
          for (; i < maxlength; i++) {
              tt1 = t1[i] || getEmpty(t2[i]);
              tt2 = t2[i] || getEmpty(tt1);
              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]))
                  ) {
                      t1 = Snap._.transform2matrix(t1, getBBox());
                      t2 = Snap._.transform2matrix(t2, getBBox());
                      from = [["m", t1.a, t1.b, t1.c, t1.d, t1.e, t1.f]];
                      to = [["m", t2.a, t2.b, t2.c, t2.d, t2.e, t2.f]];
                      break;
              }
              from[i] = [];
              to[i] = [];
              for (j = 0, jj = Math.max(tt1.length, tt2.length); j < jj; j++) {
                  j in tt1 && (from[i][j] = tt1[j]);
                  j in tt2 && (to[i][j] = tt2[j]);
              }
          }
          return {
              from: path2array(from),
              to: path2array(to),
              f: getPath(from)
          };
      }
      function getNumber(val) {
          return val;
      }
      function getUnit(unit) {
          return function (val) {
              return +val.toFixed(3) + unit;
          };
      }
      function getViewBox(val) {
          return val.join(" ");
      }
      function getColour(clr) {
          return Snap.rgb(clr[0], clr[1], clr[2]);
      }
      function getPath(path) {
          var k = 0, i, ii, j, jj, out, a, b = [];
          for (i = 0, ii = path.length; i < ii; i++) {
              out = "[";
              a = ['"' + path[i][0] + '"'];
              for (j = 1, jj = path[i].length; j < jj; j++) {
                  a[j] = "val[" + (k++) + "]";
              }
              out += a + "]";
              b[i] = out;
          }
          return Function("val", "return Snap.path.toString.call([" + b + "])");
      }
      function path2array(path) {
          var out = [];
          for (var i = 0, ii = path.length; i < ii; i++) {
              for (var j = 1, jj = path[i].length; j < jj; j++) {
                  out.push(path[i][j]);
              }
          }
          return out;
      }
      function isNumeric(obj) {
          return isFinite(parseFloat(obj));
      }
      function arrayEqual(arr1, arr2) {
          if (!Snap.is(arr1, "array") || !Snap.is(arr2, "array")) {
              return false;
          }
          return arr1.toString() == arr2.toString();
      }
      Element.prototype.equal = function (name, b) {
          return eve("snap.util.equal", this, name, b).firstDefined();
      };
      eve.on("snap.util.equal", function (name, b) {
          var A, B, a = Str(this.attr(name) || ""),
              el = this;
          if (isNumeric(a) && isNumeric(b)) {
              return {
                  from: parseFloat(a),
                  to: parseFloat(b),
                  f: getNumber
              };
          }
          if (names[name] == "colour") {
              A = Snap.color(a);
              B = Snap.color(b);
              return {
                  from: [A.r, A.g, A.b, A.opacity],
                  to: [B.r, B.g, B.b, B.opacity],
                  f: getColour
              };
          }
          if (name == "viewBox") {
              A = this.attr(name).vb.split(" ").map(Number);
              B = b.split(" ").map(Number);
              return {
                  from: A,
                  to: B,
                  f: getViewBox
              };
          }
          if (name == "transform" || name == "gradientTransform" || name == "patternTransform") {
              if (b instanceof Snap.Matrix) {
                  b = b.toTransformString();
              }
              if (!Snap._.rgTransform.test(b)) {
                  b = Snap._.svgTransform2string(b);
              }
              return equaliseTransform(a, b, function () {
                  return el.getBBox(1);
              });
          }
          if (name == "d" || name == "path") {
              A = Snap.path.toCubic(a, b);
              return {
                  from: path2array(A[0]),
                  to: path2array(A[1]),
                  f: getPath(A[0])
              };
          }
          if (name == "points") {
              A = Str(a).split(Snap._.separator);
              B = Str(b).split(Snap._.separator);
              return {
                  from: A,
                  to: B,
                  f: function (val) { return val; }
              };
          }
          var aUnit = a.match(reUnit),
              bUnit = Str(b).match(reUnit);
          if (aUnit && arrayEqual(aUnit, bUnit)) {
              return {
                  from: parseFloat(a),
                  to: parseFloat(b),
                  f: getUnit(aUnit)
              };
          } else {
              return {
                  from: this.asPX(name),
                  to: this.asPX(name, b),
                  f: getNumber
              };
          }
      });
  });
  
  // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // 
  // http://www.apache.org/licenses/LICENSE-2.0
  // 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  Snap.plugin(function (Snap, Element, Paper, glob) {
      var elproto = Element.prototype,
      has = "hasOwnProperty",
      supportsTouch = "createTouch" in glob.doc,
      events = [
          "click", "dblclick", "mousedown", "mousemove", "mouseout",
          "mouseover", "mouseup", "touchstart", "touchmove", "touchend",
          "touchcancel"
      ],
      touchMap = {
          mousedown: "touchstart",
          mousemove: "touchmove",
          mouseup: "touchend"
      },
      getScroll = function (xy, el) {
          var name = xy == "y" ? "scrollTop" : "scrollLeft",
              doc = el && el.node ? el.node.ownerDocument : glob.doc;
          return doc[name in doc.documentElement ? "documentElement" : "body"][name];
      },
      preventDefault = function () {
          this.returnValue = false;
      },
      preventTouch = function () {
          return this.originalEvent.preventDefault();
      },
      stopPropagation = function () {
          this.cancelBubble = true;
      },
      stopTouch = function () {
          return this.originalEvent.stopPropagation();
      },
      addEvent = function (obj, type, fn, element) {
          var realName = supportsTouch && touchMap[type] ? touchMap[type] : type,
              f = function (e) {
                  var scrollY = getScroll("y", element),
                      scrollX = getScroll("x", element);
                  if (supportsTouch && touchMap[has](type)) {
                      for (var i = 0, ii = e.targetTouches && e.targetTouches.length; i < ii; i++) {
                          if (e.targetTouches[i].target == obj || obj.contains(e.targetTouches[i].target)) {
                              var olde = e;
                              e = e.targetTouches[i];
                              e.originalEvent = olde;
                              e.preventDefault = preventTouch;
                              e.stopPropagation = stopTouch;
                              break;
                          }
                      }
                  }
                  var x = e.clientX + scrollX,
                      y = e.clientY + scrollY;
                  return fn.call(element, e, x, y);
              };
  
          if (type !== realName) {
              obj.addEventListener(type, f, false);
          }
  
          obj.addEventListener(realName, f, false);
  
          return function () {
              if (type !== realName) {
                  obj.removeEventListener(type, f, false);
              }
  
              obj.removeEventListener(realName, f, false);
              return true;
          };
      },
      drag = [],
      dragMove = function (e) {
          var x = e.clientX,
              y = e.clientY,
              scrollY = getScroll("y"),
              scrollX = getScroll("x"),
              dragi,
              j = drag.length;
          while (j--) {
              dragi = drag[j];
              if (supportsTouch) {
                  var i = e.touches && e.touches.length,
                      touch;
                  while (i--) {
                      touch = e.touches[i];
                      if (touch.identifier == dragi.el._drag.id || dragi.el.node.contains(touch.target)) {
                          x = touch.clientX;
                          y = touch.clientY;
                          (e.originalEvent ? e.originalEvent : e).preventDefault();
                          break;
                      }
                  }
              } else {
                  e.preventDefault();
              }
              var node = dragi.el.node,
                  o,
                  next = node.nextSibling,
                  parent = node.parentNode,
                  display = node.style.display;
              // glob.win.opera && parent.removeChild(node);
              // node.style.display = "none";
              // o = dragi.el.paper.getElementByPoint(x, y);
              // node.style.display = display;
              // glob.win.opera && (next ? parent.insertBefore(node, next) : parent.appendChild(node));
              // o && eve("snap.drag.over." + dragi.el.id, dragi.el, o);
              x += scrollX;
              y += scrollY;
              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);
          }
      },
      dragUp = function (e) {
          Snap.unmousemove(dragMove).unmouseup(dragUp);
          var i = drag.length,
              dragi;
          while (i--) {
              dragi = drag[i];
              dragi.el._drag = {};
              eve("snap.drag.end." + dragi.el.id, dragi.end_scope || dragi.start_scope || dragi.move_scope || dragi.el, e);
              eve.off("snap.drag.*." + dragi.el.id);
          }
          drag = [];
      };
      /*\
       * Element.click
       [ method ]
       **
       * Adds a click event handler to the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      /*\
       * Element.unclick
       [ method ]
       **
       * Removes a click event handler from the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      
      /*\
       * Element.dblclick
       [ method ]
       **
       * Adds a double click event handler to the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      /*\
       * Element.undblclick
       [ method ]
       **
       * Removes a double click event handler from the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      
      /*\
       * Element.mousedown
       [ method ]
       **
       * Adds a mousedown event handler to the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      /*\
       * Element.unmousedown
       [ method ]
       **
       * Removes a mousedown event handler from the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      
      /*\
       * Element.mousemove
       [ method ]
       **
       * Adds a mousemove event handler to the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      /*\
       * Element.unmousemove
       [ method ]
       **
       * Removes a mousemove event handler from the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      
      /*\
       * Element.mouseout
       [ method ]
       **
       * Adds a mouseout event handler to the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      /*\
       * Element.unmouseout
       [ method ]
       **
       * Removes a mouseout event handler from the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      
      /*\
       * Element.mouseover
       [ method ]
       **
       * Adds a mouseover event handler to the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      /*\
       * Element.unmouseover
       [ method ]
       **
       * Removes a mouseover event handler from the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      
      /*\
       * Element.mouseup
       [ method ]
       **
       * Adds a mouseup event handler to the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      /*\
       * Element.unmouseup
       [ method ]
       **
       * Removes a mouseup event handler from the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      
      /*\
       * Element.touchstart
       [ method ]
       **
       * Adds a touchstart event handler to the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      /*\
       * Element.untouchstart
       [ method ]
       **
       * Removes a touchstart event handler from the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      
      /*\
       * Element.touchmove
       [ method ]
       **
       * Adds a touchmove event handler to the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      /*\
       * Element.untouchmove
       [ method ]
       **
       * Removes a touchmove event handler from the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      
      /*\
       * Element.touchend
       [ method ]
       **
       * Adds a touchend event handler to the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      /*\
       * Element.untouchend
       [ method ]
       **
       * Removes a touchend event handler from the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      
      /*\
       * Element.touchcancel
       [ method ]
       **
       * Adds a touchcancel event handler to the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      /*\
       * Element.untouchcancel
       [ method ]
       **
       * Removes a touchcancel event handler from the element
       - handler (function) handler for the event
       = (object) @Element
      \*/
      for (var i = events.length; i--;) {
          (function (eventName) {
              Snap[eventName] = elproto[eventName] = function (fn, scope) {
                  if (Snap.is(fn, "function")) {
                      this.events = this.events || [];
                      this.events.push({
                          name: eventName,
                          f: fn,
                          unbind: addEvent(this.node || document, eventName, fn, scope || this)
                      });
                  } else {
                      for (var i = 0, ii = this.events.length; i < ii; i++) if (this.events[i].name == eventName) {
                          try {
                              this.events[i].f.call(this);
                          } catch (e) {}
                      }
                  }
                  return this;
              };
              Snap["un" + eventName] =
              elproto["un" + eventName] = function (fn) {
                  var events = this.events || [],
                      l = events.length;
                  while (l--) if (events[l].name == eventName &&
                                 (events[l].f == fn || !fn)) {
                      events[l].unbind();
                      events.splice(l, 1);
                      !events.length && delete this.events;
                      return this;
                  }
                  return this;
              };
          })(events[i]);
      }
      /*\
       * Element.hover
       [ method ]
       **
       * Adds hover event handlers to the element
       - f_in (function) handler for hover in
       - f_out (function) handler for hover out
       - icontext (object) #optional context for hover in handler
       - ocontext (object) #optional context for hover out handler
       = (object) @Element
      \*/
      elproto.hover = function (f_in, f_out, scope_in, scope_out) {
          return this.mouseover(f_in, scope_in).mouseout(f_out, scope_out || scope_in);
      };
      /*\
       * Element.unhover
       [ method ]
       **
       * Removes hover event handlers from the element
       - f_in (function) handler for hover in
       - f_out (function) handler for hover out
       = (object) @Element
      \*/
      elproto.unhover = function (f_in, f_out) {
          return this.unmouseover(f_in).unmouseout(f_out);
      };
      var draggable = [];
      // SIERRA unclear what _context_ refers to for starting, ending, moving the drag gesture.
      // SIERRA Element.drag(): _x position of the mouse_: Where are the x/y values offset from?
      // SIERRA Element.drag(): much of this member's doc appears to be duplicated for some reason.
      // 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?
      /*\
       * Element.drag
       [ method ]
       **
       * Adds event handlers for an element's drag gesture
       **
       - onmove (function) handler for moving
       - onstart (function) handler for drag start
       - onend (function) handler for drag end
       - mcontext (object) #optional context for moving handler
       - scontext (object) #optional context for drag start handler
       - econtext (object) #optional context for drag end handler
       * Additionaly following `drag` events are triggered: `drag.start.<id>` on start, 
       * `drag.end.<id>` on end and `drag.move.<id>` on every move. When element is dragged over another element 
       * `drag.over.<id>` fires as well.
       *
       * Start event and start handler are called in specified context or in context of the element with following parameters:
       o x (number) x position of the mouse
       o y (number) y position of the mouse
       o event (object) DOM event object
       * Move event and move handler are called in specified context or in context of the element with following parameters:
       o dx (number) shift by x from the start point
       o dy (number) shift by y from the start point
       o x (number) x position of the mouse
       o y (number) y position of the mouse
       o event (object) DOM event object
       * End event and end handler are called in specified context or in context of the element with following parameters:
       o event (object) DOM event object
       = (object) @Element
      \*/
      elproto.drag = function (onmove, onstart, onend, move_scope, start_scope, end_scope) {
          var el = this;
          if (!arguments.length) {
              var origTransform;
              return el.drag(function (dx, dy) {
                  this.attr({
                      transform: origTransform + (origTransform ? "T" : "t") + [dx, dy]
                  });
              }, function () {
                  origTransform = this.transform().local;
              });
          }
          function start(e, x, y) {
              (e.originalEvent || e).preventDefault();
              el._drag.x = x;
              el._drag.y = y;
              el._drag.id = e.identifier;
              !drag.length && Snap.mousemove(dragMove).mouseup(dragUp);
              drag.push({el: el, move_scope: move_scope, start_scope: start_scope, end_scope: end_scope});
              onstart && eve.on("snap.drag.start." + el.id, onstart);
              onmove && eve.on("snap.drag.move." + el.id, onmove);
              onend && eve.on("snap.drag.end." + el.id, onend);
              eve("snap.drag.start." + el.id, start_scope || move_scope || el, x, y, e);
          }
          function init(e, x, y) {
              eve("snap.draginit." + el.id, el, e, x, y);
          }
          eve.on("snap.draginit." + el.id, start);
          el._drag = {};
          draggable.push({el: el, start: start, init: init});
          el.mousedown(init);
          return el;
      };
      /*
       * Element.onDragOver
       [ method ]
       **
       * Shortcut to assign event handler for `drag.over.<id>` event, where `id` is the element's `id` (see @Element.id)
       - f (function) handler for event, first argument would be the element you are dragging over
      \*/
      // elproto.onDragOver = function (f) {
      //     f ? eve.on("snap.drag.over." + this.id, f) : eve.unbind("snap.drag.over." + this.id);
      // };
      /*\
       * Element.undrag
       [ method ]
       **
       * Removes all drag event handlers from the given element
      \*/
      elproto.undrag = function () {
          var i = draggable.length;
          while (i--) if (draggable[i].el == this) {
              this.unmousedown(draggable[i].init);
              draggable.splice(i, 1);
              eve.unbind("snap.drag.*." + this.id);
              eve.unbind("snap.draginit." + this.id);
          }
          !draggable.length && Snap.unmousemove(dragMove).unmouseup(dragUp);
          return this;
      };
  });
  
  // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // 
  // http://www.apache.org/licenses/LICENSE-2.0
  // 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  Snap.plugin(function (Snap, Element, Paper, glob) {
      var elproto = Element.prototype,
          pproto = Paper.prototype,
          rgurl = /^\s*url\((.+)\)/,
          Str = String,
          $ = Snap._.$;
      Snap.filter = {};
      /*\
       * Paper.filter
       [ method ]
       **
       * Creates a `<filter>` element
       **
       - filstr (string) SVG fragment of filter provided as a string
       = (object) @Element
       * Note: It is recommended to use filters embedded into the page inside an empty SVG element.
       > Usage
       | var f = paper.filter('<feGaussianBlur stdDeviation="2"/>'),
       |     c = paper.circle(10, 10, 10).attr({
       |         filter: f
       |     });
      \*/
      pproto.filter = function (filstr) {
          var paper = this;
          if (paper.type != "svg") {
              paper = paper.paper;
          }
          var f = Snap.parse(Str(filstr)),
              id = Snap._.id(),
              width = paper.node.offsetWidth,
              height = paper.node.offsetHeight,
              filter = $("filter");
          $(filter, {
              id: id,
              filterUnits: "userSpaceOnUse"
          });
          filter.appendChild(f.node);
          paper.defs.appendChild(filter);
          return new Element(filter);
      };
      
      eve.on("snap.util.getattr.filter", function () {
          eve.stop();
          var p = $(this.node, "filter");
          if (p) {
              var match = Str(p).match(rgurl);
              return match && Snap.select(match[1]);
          }
      });
      eve.on("snap.util.attr.filter", function (value) {
          if (value instanceof Element && value.type == "filter") {
              eve.stop();
              var id = value.node.id;
              if (!id) {
                  $(value.node, {id: value.id});
                  id = value.id;
              }
              $(this.node, {
                  filter: Snap.url(id)
              });
          }
          if (!value || value == "none") {
              eve.stop();
              this.node.removeAttribute("filter");
          }
      });
      /*\
       * Snap.filter.blur
       [ method ]
       **
       * Returns an SVG markup string for the blur filter
       **
       - x (number) amount of horizontal blur, in pixels
       - y (number) #optional amount of vertical blur, in pixels
       = (string) filter representation
       > Usage
       | var f = paper.filter(Snap.filter.blur(5, 10)),
       |     c = paper.circle(10, 10, 10).attr({
       |         filter: f
       |     });
      \*/
      Snap.filter.blur = function (x, y) {
          if (x == null) {
              x = 2;
          }
          var def = y == null ? x : [x, y];
          return Snap.format('\<feGaussianBlur stdDeviation="{def}"/>', {
              def: def
          });
      };
      Snap.filter.blur.toString = function () {
          return this();
      };
      /*\
       * Snap.filter.shadow
       [ method ]
       **
       * Returns an SVG markup string for the shadow filter
       **
       - dx (number) #optional horizontal shift of the shadow, in pixels
       - dy (number) #optional vertical shift of the shadow, in pixels
       - blur (number) #optional amount of blur
       - color (string) #optional color of the shadow
       - opacity (number) #optional `0..1` opacity of the shadow
       * or
       - dx (number) #optional horizontal shift of the shadow, in pixels
       - dy (number) #optional vertical shift of the shadow, in pixels
       - color (string) #optional color of the shadow
       - opacity (number) #optional `0..1` opacity of the shadow
       * which makes blur default to `4`. Or
       - dx (number) #optional horizontal shift of the shadow, in pixels
       - dy (number) #optional vertical shift of the shadow, in pixels
       - opacity (number) #optional `0..1` opacity of the shadow
       = (string) filter representation
       > Usage
       | var f = paper.filter(Snap.filter.shadow(0, 2, 3)),
       |     c = paper.circle(10, 10, 10).attr({
       |         filter: f
       |     });
      \*/
      Snap.filter.shadow = function (dx, dy, blur, color, opacity) {
          if (typeof blur == "string") {
              color = blur;
              opacity = color;
              blur = 4;
          }
          if (typeof color != "string") {
              opacity = color;
              color = "#000";
          }
          color = color || "#000";
          if (blur == null) {
              blur = 4;
          }
          if (opacity == null) {
              opacity = 1;
          }
          if (dx == null) {
              dx = 0;
              dy = 2;
          }
          if (dy == null) {
              dy = dx;
          }
          color = Snap.color(color);
          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>', {
              color: color,
              dx: dx,
              dy: dy,
              blur: blur,
              opacity: opacity
          });
      };
      Snap.filter.shadow.toString = function () {
          return this();
      };
      /*\
       * Snap.filter.grayscale
       [ method ]
       **
       * Returns an SVG markup string for the grayscale filter
       **
       - amount (number) amount of filter (`0..1`)
       = (string) filter representation
      \*/
      Snap.filter.grayscale = function (amount) {
          if (amount == null) {
              amount = 1;
          }
          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"/>', {
              a: 0.2126 + 0.7874 * (1 - amount),
              b: 0.7152 - 0.7152 * (1 - amount),
              c: 0.0722 - 0.0722 * (1 - amount),
              d: 0.2126 - 0.2126 * (1 - amount),
              e: 0.7152 + 0.2848 * (1 - amount),
              f: 0.0722 - 0.0722 * (1 - amount),
              g: 0.2126 - 0.2126 * (1 - amount),
              h: 0.0722 + 0.9278 * (1 - amount)
          });
      };
      Snap.filter.grayscale.toString = function () {
          return this();
      };
      /*\
       * Snap.filter.sepia
       [ method ]
       **
       * Returns an SVG markup string for the sepia filter
       **
       - amount (number) amount of filter (`0..1`)
       = (string) filter representation
      \*/
      Snap.filter.sepia = function (amount) {
          if (amount == null) {
              amount = 1;
          }
          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"/>', {
              a: 0.393 + 0.607 * (1 - amount),
              b: 0.769 - 0.769 * (1 - amount),
              c: 0.189 - 0.189 * (1 - amount),
              d: 0.349 - 0.349 * (1 - amount),
              e: 0.686 + 0.314 * (1 - amount),
              f: 0.168 - 0.168 * (1 - amount),
              g: 0.272 - 0.272 * (1 - amount),
              h: 0.534 - 0.534 * (1 - amount),
              i: 0.131 + 0.869 * (1 - amount)
          });
      };
      Snap.filter.sepia.toString = function () {
          return this();
      };
      /*\
       * Snap.filter.saturate
       [ method ]
       **
       * Returns an SVG markup string for the saturate filter
       **
       - amount (number) amount of filter (`0..1`)
       = (string) filter representation
      \*/
      Snap.filter.saturate = function (amount) {
          if (amount == null) {
              amount = 1;
          }
          return Snap.format('<feColorMatrix type="saturate" values="{amount}"/>', {
              amount: 1 - amount
          });
      };
      Snap.filter.saturate.toString = function () {
          return this();
      };
      /*\
       * Snap.filter.hueRotate
       [ method ]
       **
       * Returns an SVG markup string for the hue-rotate filter
       **
       - angle (number) angle of rotation
       = (string) filter representation
      \*/
      Snap.filter.hueRotate = function (angle) {
          angle = angle || 0;
          return Snap.format('<feColorMatrix type="hueRotate" values="{angle}"/>', {
              angle: angle
          });
      };
      Snap.filter.hueRotate.toString = function () {
          return this();
      };
      /*\
       * Snap.filter.invert
       [ method ]
       **
       * Returns an SVG markup string for the invert filter
       **
       - amount (number) amount of filter (`0..1`)
       = (string) filter representation
      \*/
      Snap.filter.invert = function (amount) {
          if (amount == null) {
              amount = 1;
          }
  //        <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"/>
          return Snap.format('<feComponentTransfer><feFuncR type="table" tableValues="{amount} {amount2}"/><feFuncG type="table" tableValues="{amount} {amount2}"/><feFuncB type="table" tableValues="{amount} {amount2}"/></feComponentTransfer>', {
              amount: amount,
              amount2: 1 - amount
          });
      };
      Snap.filter.invert.toString = function () {
          return this();
      };
      /*\
       * Snap.filter.brightness
       [ method ]
       **
       * Returns an SVG markup string for the brightness filter
       **
       - amount (number) amount of filter (`0..1`)
       = (string) filter representation
      \*/
      Snap.filter.brightness = function (amount) {
          if (amount == null) {
              amount = 1;
          }
          return Snap.format('<feComponentTransfer><feFuncR type="linear" slope="{amount}"/><feFuncG type="linear" slope="{amount}"/><feFuncB type="linear" slope="{amount}"/></feComponentTransfer>', {
              amount: amount
          });
      };
      Snap.filter.brightness.toString = function () {
          return this();
      };
      /*\
       * Snap.filter.contrast
       [ method ]
       **
       * Returns an SVG markup string for the contrast filter
       **
       - amount (number) amount of filter (`0..1`)
       = (string) filter representation
      \*/
      Snap.filter.contrast = function (amount) {
          if (amount == null) {
              amount = 1;
          }
          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>', {
              amount: amount,
              amount2: .5 - amount / 2
          });
      };
      Snap.filter.contrast.toString = function () {
          return this();
      };
  });
  
  // Copyright (c) 2014 Adobe Systems Incorporated. All rights reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  // http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
      var box = Snap._.box,
          is = Snap.is,
          firstLetter = /^[^a-z]*([tbmlrc])/i,
          toString = function () {
              return "T" + this.dx + "," + this.dy;
          };
      /*\
       * Element.getAlign
       [ method ]
       **
       * Returns shift needed to align the element relatively to given element.
       * If no elements specified, parent `<svg>` container will be used.
       - el (object) @optional alignment element
       - way (string) one of six values: `"top"`, `"middle"`, `"bottom"`, `"left"`, `"center"`, `"right"`
       = (object|string) Object in format `{dx: , dy: }` also has a string representation as a transformation string
       > Usage
       | el.transform(el.getAlign(el2, "top"));
       * or
       | var dy = el.getAlign(el2, "top").dy;
      \*/
      Element.prototype.getAlign = function (el, way) {
          if (way == null && is(el, "string")) {
              way = el;
              el = null;
          }
          el = el || this.paper;
          var bx = el.getBBox ? el.getBBox() : box(el),
              bb = this.getBBox(),
              out = {};
          way = way && way.match(firstLetter);
          way = way ? way[1].toLowerCase() : "c";
          switch (way) {
              case "t":
                  out.dx = 0;
                  out.dy = bx.y - bb.y;
              break;
              case "b":
                  out.dx = 0;
                  out.dy = bx.y2 - bb.y2;
              break;
              case "m":
                  out.dx = 0;
                  out.dy = bx.cy - bb.cy;
              break;
              case "l":
                  out.dx = bx.x - bb.x;
                  out.dy = 0;
              break;
              case "r":
                  out.dx = bx.x2 - bb.x2;
                  out.dy = 0;
              break;
              default:
                  out.dx = bx.cx - bb.cx;
                  out.dy = 0;
              break;
          }
          out.toString = toString;
          return out;
      };
      /*\
       * Element.align
       [ method ]
       **
       * Aligns the element relatively to given one via transformation.
       * If no elements specified, parent `<svg>` container will be used.
       - el (object) @optional alignment element
       - way (string) one of six values: `"top"`, `"middle"`, `"bottom"`, `"left"`, `"center"`, `"right"`
       = (object) this element
       > Usage
       | el.align(el2, "top");
       * or
       | el.align("middle");
      \*/
      Element.prototype.align = function (el, way) {
          return this.transform("..." + this.getAlign(el, way));
      };
  });
  
  return Snap;
  }));