[
  {
    "path": ".gitignore",
    "content": "build\nnode_modules\n.DS_Store\n"
  },
  {
    "path": "README.md",
    "content": "\n\n\n\n\n<!-- PROJECT SHIELDS -->\n<!--\n*** I'm using markdown \"reference style\" links for readability.\n*** Reference links are enclosed in brackets [ ] instead of parentheses ( ).\n*** See the bottom of this document for the declaration of the reference variables\n*** for contributors-url, forks-url, etc. This is an optional, concise syntax you may use.\n*** https://www.markdownguide.org/basic-syntax/#reference-style-links\n-->\n<!-- [![Contributors][contributors-shield]][contributors-url] -->\n<!-- [![Stargazers][stars-shield]][stars-url]\n[![LinkedIn][linkedin-shield]][linkedin-url] -->\n\n\n\n<!-- PROJECT LOGO -->\n<br />\n<p align=\"center\">\n  <a href=\"https://github.com/oslabs-beta/TotalRecoilJS\">\n    <img src=\"src/icons/Recoil-PNG-Gray.png\" alt=\"Logo\" width=\"200\" >\n  </a>\n\n  <!-- <h3 align=\"center\">TotalRecoilJS</h3> -->\n\n  <p align=\"center\">\n    A tool for Recoil developers\n    <br />\n    <a href=\"https://chrome.google.com/webstore/detail/recoil-dev-tools/dhjcdlmklldodggmleehadpjephfgflc\"><strong>Download Chrome Extension»</strong></a>\n    <br />\n    <br />\n    <a href=\"https://github.com/silvia-miranda/RecoilTravel\">View Demo App (Recoil Application)</a>\n    \n  </p>\n</p>\n\n\n\n<!-- TABLE OF CONTENTS -->\n## Table of Contents\n\n* [About the Project](#about-the-project)\n  * [Built With](#built-with)\n* [Getting Started](#getting-started)\n  * [Prerequisites](#prerequisites)\n  * [Installation](#installation)\n* [Usage](#usage)\n* [License](#license)\n* [Authors](#authors)\n* [Acknowledgements](#acknowledgements)\n\n\n\n<!-- ABOUT THE PROJECT -->\n## About The Project\n\nTotal RecoilJS is a tool created to help developers visualize and track their Recoil state via a Chrome extension.\n\n\n### Built With\n\n* [React](https://reactjs.org/)\n* [D3](https://d3js.org/)\n* [TypeScript](https://www.typescriptlang.org/)\n* [Chrome DevTools](https://developers.google.com/web/tools/chrome-devtools)\n\n\n\n\n<!-- GETTING STARTED -->\n## Getting Started\n\nTo get a local copy up and running, follow these simple steps.\n\n### Prerequisites\n\nInstall React DevTools\n```sh\nhttps://chrome.google.com/webstore/detail/react-developer-tools/\n```\n\n### Installation\n \n1. Clone the TotalRecoilJS github\n```sh\ngit clone https://github.com/oslabs-beta/TotalRecoilJS.git\n```\n2. Install NPM packages\n```sh\nnpm install\n```\n3. Start development server\n```sh\nnpm run dev\n```\n4. Unpack to Google Chrome Extensions \n\n5. Navigate to Extensions -> Load Unpacked -> Select Total-Recoil/build/extension\n\n![](/src/img/installApp.gif)\n\n\n\n<!-- USAGE EXAMPLES -->\n## Usage\n\n\nVisualize your component tree and see which components are subscribed to which atoms. When you click on an atom’s name, all components that are subscribed to that piece of state will light up.\n\nTroubleshoot by seeing the current state held in each atom. \n\n![](/src/img/showState-tab.gif)\n\n<insert gif of atom state>\n\nView list of previous states to track changes. \nOn the history tab, you can see up to 10 previous state snapshots.\n\n![](/src/img/history-tab.gif)\n\n<insert gif of history>\n\n View all selector-atom subscriptions using our interactive sunburst and click on any selector to see all subscribed atoms.\n\n<insert gif of sunburst image>\n  \n  ![](/src/img/selector.gif)\n\n\n\n\n<!-- CONTRIBUTING -->\n## Contributing\n\nContributions are what make the open source community such an amazing place to be learn, inspire, and create. Any contributions you make are **greatly appreciated**.\n\n\n\n<!-- LICENSE -->\n## License\n\nDistributed under the MIT License. See `LICENSE` for more information.\n\n\n\n<!-- CONTACT -->\n## Authors\n\n<strong>Anthony Lee - [@linkedIn](https://www.linkedin.com/in/anthony-lee27/) - [@GitHub](https://github.com/anthonylee2797)\n\n<strong>Khizar Rehman - [@linkedIn](https://www.linkedin.com/in/khizar-rehman-a125711b4/) - [@GitHub](https://github.com/keyz-man)\n\n<strong>Silvia Miranda - [@linkedIn](https://www.linkedin.com/in/silviakempmiranda/) - [@GitHub](https://github.com/silvia-miranda)\n\n<strong>Zi Hao He - [@linkedIn](https://www.linkedin.com/in/zi-hao-he/) - [@GitHub](https://github.com/exquizzle)\n\n<strong>Kevin Ruan - [@linkedIn](https://www.linkedin.com/in/kevin-ruan-7799711b1/) - [@GitHub](https://github.com/kevinr108)\n\n\n\n<!-- ACKNOWLEDGEMENTS -->\n## Acknowledgements\n\nDenys Dekhtiarenko - [@linkedIn](https://www.linkedin.com/in/denysdekhtiarenko/) - [@GitHub](https://github.com/denskarlet)\n\n\n\n\n\n\n\n<!-- MARKDOWN LINKS & IMAGES -->\n<!-- https://www.markdownguide.org/basic-syntax/#reference-style-links -->\n[contributors-shield]: https://github.com/oslabs-beta/TotalRecoilJS/graphs/contributors\n[contributors-url]: https://github.com/oslabs-beta/TotalRecoilJS/graphs/contributors\n[forks-shield]: https://img.shields.io/github/forks/othneildrew/Best-README-Template.svg?style=flat-square\n[forks-url]: https://github.com/othneildrew/Best-README-Template/network/members\n[stars-shield]: https://img.shields.io/github/stars/othneildrew/Best-README-Template.svg?style=flat-square\n[stars-url]: https://github.com/oslabs-beta/TotalRecoilJS/stargazers\n[issues-shield]: https://img.shields.io/github/issues/othneildrew/Best-README-Template.svg?style=flat-square\n\n[license-url]: https://github.com/othneildrew/Best-README-Template/blob/master/LICENSE.txt\n[linkedin-shield]: https://img.shields.io/badge/-LinkedIn-black.svg?style=flat-square&logo=linkedin&colorB=555\n[linkedin-url]: https://linkedin.com/in/othneildrew\n[product-screenshot]: images/screenshot.png\n"
  },
  {
    "path": "__test__/__snapshots__/demo.test.js.snap",
    "content": "// Jest Snapshot v1, https://goo.gl/fbAQLP\n\nexports[`renders & matches snapshot - componetAtomTree props 1`] = `\n<DocumentFragment>\n  <div\n    class=\"graph-container\"\n  >\n    <h1\n      class=\"h1-absolute\"\n    >\n      Component Tree\n    </h1>\n    <button\n      class=\"graph-button-1\"\n    >\n      Change View\n    </button>\n    <div\n      id=\"canvas\"\n    >\n      <svg\n        height=\"768\"\n        width=\"512\"\n      >\n        <g\n          transform=\"translate(100, -60)\"\n        >\n          <g\n            class=\"node\"\n            transform=\"translate(0,256)\"\n          >\n            <circle\n              fill=\"steelblue\"\n              r=\"6\"\n            />\n            <text\n              dy=\"0.31em\"\n              text-anchor=\"start\"\n              x=\"6\"\n            >\n              test App\n            </text>\n          </g>\n          <g\n            class=\"node\"\n            transform=\"translate(95,256)\"\n          >\n            <circle\n              fill=\"steelblue\"\n              r=\"6\"\n            />\n            <text\n              dy=\"0.31em\"\n              text-anchor=\"start\"\n              x=\"6\"\n            >\n              test Recoil Root\n            </text>\n          </g>\n          <g\n            class=\"node\"\n            transform=\"translate(190,128)\"\n          >\n            <circle\n              fill=\"steelblue\"\n              r=\"6\"\n            />\n            <text\n              dy=\"0.31em\"\n              text-anchor=\"start\"\n              x=\"6\"\n            >\n              Body\n            </text>\n          </g>\n          <g\n            class=\"node\"\n            transform=\"translate(190,384)\"\n          >\n            <circle\n              fill=\"steelblue\"\n              r=\"6\"\n            />\n            <text\n              dy=\"0.31em\"\n              text-anchor=\"start\"\n              x=\"6\"\n            >\n              List\n            </text>\n          </g>\n          <path\n            class=\"link\"\n            d=\"M0,256C0,256,95,256,95,256\"\n            fill=\"none\"\n            stroke=\"green\"\n            stroke-opacity=\"0.4\"\n            stroke-width=\"1.5\"\n          />\n          <path\n            class=\"link\"\n            d=\"M95,256C95,192,190,192,190,128\"\n            fill=\"none\"\n            stroke=\"green\"\n            stroke-opacity=\"0.4\"\n            stroke-width=\"1.5\"\n          />\n          <path\n            class=\"link\"\n            d=\"M95,256C95,320,190,320,190,384\"\n            fill=\"none\"\n            stroke=\"green\"\n            stroke-opacity=\"0.4\"\n            stroke-width=\"1.5\"\n          />\n        </g>\n      </svg>\n    </div>\n  </div>\n</DocumentFragment>\n`;\n\nexports[`renders & matches snapshot - no props 1`] = `\n<DocumentFragment>\n  <div\n    class=\"graph-container\"\n  >\n    <h1\n      class=\"h1-absolute\"\n    >\n      Component Tree\n    </h1>\n    <button\n      class=\"graph-button-1\"\n    >\n      Change View\n    </button>\n    <div\n      id=\"canvas\"\n    />\n  </div>\n</DocumentFragment>\n`;\n"
  },
  {
    "path": "__test__/demo.test.js",
    "content": "import React from 'react';\nimport GraphPanel from '../extension/frontend/view/Components/GraphPanel';\nimport { tree } from '../mock/snapshot.js';\nimport {\n  render,\n  cleanup,\n} from '@testing-library/react';\nimport '@testing-library/jest-dom/extend-expect';\nimport '@babel/polyfill';\n\nafterEach(cleanup);\n\nit('renders & matches snapshot - no props', () => {\n  const {asFragment} = render(<GraphPanel />);\n  expect(asFragment()).toMatchSnapshot();\n});\n\nit('renders & matches snapshot - Tree props', () => {\n  const {asFragment} = render(\n    <GraphPanel\n      tree={ tree }\n    />,\n  );\n  expect(asFragment()).toMatchSnapshot();\n});"
  },
  {
    "path": "babel.config.js",
    "content": "module.exports = {\n  presets: [\n    '@babel/preset-env',\n    '@babel/preset-react',\n    '@babel/preset-typescript',\n  ],\n  plugins: ['@babel/plugin-proposal-class-properties'],\n};\n"
  },
  {
    "path": "extension/backend/background.js",
    "content": "const connectedTabs = {};\n\n//opens a long-running port connection between background script and content script\n//adds tab info for any tab that has our extension open\n//executes content script on connect (aka adding hook.js script)cd ..\nchrome.runtime.onConnect.addListener((port) => {\n\n  const panelListener = (request, sender, sendResponse) => {\n    if (request.name === 'connect' && request.tabID) {\n      connectedTabs[request.tabID] = port;\n    }\n    chrome.tabs.executeScript({\n      file: './content_script.js'\n    });\n  }\n\n  //keeps listening on open port\n  port.onMessage.addListener(panelListener);\n\n  //when the port is disconnected it removes the tabID from the connectedTabs object and removes panelListener\n  port.onDisconnect.addListener(function(port) {\n\n    port.onMessage.removeListener(panelListener);\n    const tabs = Object.keys(connectedTabs);\n    for (let k = 0; k < tabs.length; k++) {\n      if (connectedTabs[tabs[k]] === port){\n        delete connectedTabs[tabs[k]];\n        break;\n      } \n    }\n    \n  });\n  \n});\n\n//runs after receiving message from the content script, it keeps track of the tab.id data when the recoil function in currently running on for reference\nfunction handleMessage(request, sender, sendResponse) {\n  if(sender.tab) {\n    const tabID = sender.tab.id;\n    if (tabID in connectedTabs) {\n      connectedTabs[tabID].postMessage(request);\n    }\n  }\n  \n  return Promise.resolve('Filler resolution for the browser');\n}\n\n//listens for messages from content script\nchrome.runtime.onMessage.addListener(handleMessage);\n\n\n//on every refresh this listener injects the content script\nchrome.tabs.onUpdated.addListener(function(tabID, changeInfo, tab) {\n  if(connectedTabs[tabID]) {\n    chrome.tabs.executeScript({\n      file: './content_script.js'\n    });\n  }\n})"
  },
  {
    "path": "extension/backend/content_script.js",
    "content": "//this will inject the hook file in the application after 500 milliseconds after the application starts to make sure the hook script is appended when the DOM is loaded\nconst time = 500;\nsetTimeout (() => {\n  const script = document.createElement('script');\n  script.src = chrome.extension.getURL('hook.js');\n  document.head.appendChild(script);\n}, time);\n\n//this is listening for the message from the hook file\nwindow.addEventListener('message', handleMessage);\n\n//handle message function runs when a message is received from the hook file and if it has the tree data it will fire the sendMessage function\nfunction handleMessage(request, sender, sendResponse) {\n  if (request.data && request.data.tree) {\n    sendMessage(request.data.tree);\n  }\n}\n\n//the sendMessage function sends the backend tree and atom/selector data to the background script\nfunction sendMessage(tree) {\n  chrome.runtime.sendMessage(tree);\n}"
  },
  {
    "path": "extension/backend/hook.ts",
    "content": "const throttle = require('lodash.throttle')\n\n//the export exists to indicate that the file is a module for typescript to allow the code to use global object\nexport {};\n//define variable types for typscript here\ndeclare global {\n\n  interface devTools {\n    renderers: { size?: number };\n    // onCommitFiberRoot(any?);\n  }\n\n  interface Window {\n    __REACT_DEVTOOLS_GLOBAL_HOOK__: devTools;\n  }\n\n  interface Component {\n    name: any;\n    state?: any;\n    children?: any;\n    atoms?: any;\n  }\n\n\n}\n\nfunction patcher() {\n\n  // grabs the React DevTools from the browser\n  const devTools:any = window.__REACT_DEVTOOLS_GLOBAL_HOOK__;\n  // if conditions to check if devTools is running or the user application is react\n  if (!devTools) {\n    sendToContentScript('React DevTools is not activated, please activate React DevTools!')\n  }\n  if (devTools.renderers && devTools.renderers.size < 1) {\n    sendToContentScript('The page is not using React or if it is using React please trigger a state change!')\n  }\n  // adding/patching functionality to capture fiberTree data to the onCommitFiberRoot method in devTools\n  devTools.onCommitFiberRoot = (function (original) {\n    function newFunc(...args:any) {\n      const fiberDOM = args[1];\n      console.log(fiberDOM);\n      const rootNode = fiberDOM.current.stateNode.current;\n      //create a new array that will be sent to the frontend after being populated with necessary data\n      const treeArr: any[] = [];\n      try {\n        //this function collects the data for the component tree and stores atom names and state data\n        recurseThrottle(rootNode.child, treeArr);\n        //this function below gets the atom value data for the right panel in UI\n        treeArr.push(getAtomValues(treeArr[0], 'atomValues'));\n        //this function gets the link between selectors and atom for the selector/atom tree\n        treeArr.push(getSelectorAtomLink(treeArr[0], 'nodeToNodeSubscriptions'))\n        //if the data is populated correctly, the array will be sent to the content_script file in the backend\n        console.log('treearr sent to frontend', treeArr)\n        if (treeArr.length > 0) sendToContentScript(treeArr);\n      } catch (err) {\n        console.log('Error at onCommitFiberRoot:', err)\n        sendToContentScript('Error: something went wrong with our application, please submit the issue on https://github.com/oslabs-beta/TotalRecoilJS')\n      }\n      return original(...args);\n    }\n    return newFunc;\n    // Below syntax devTools.onCommitFiberRoot runs immediately after adding our new functionality to devTools.onCommitFiberRoot (and the input is the original function of onCommitFiberRoot)\n  })(devTools.onCommitFiberRoot)\n\n}\n\n//throttling the recusrive function getComponentData to run only once in 300 milliseconds, to improve performance as changes are made in the user application \nconst recurseThrottle = throttle(getComponentData, 300);\n\n//recursive function (getComponentData) below traverses through the fiber tree and collects certain component,state, and atom data\nfunction getComponentData(node: any, arr: any[]) {\n  const component: Component = {name: ''};\n  if (getName(node, component, arr) === -1) return;\n  getState(node, component)\n  getAtom(component)\n  arr.push(component)\n  //getchildren calls getComponentData (name, state, atom), pushes into nested \"children\" array\n  getChildren(node, component, arr)\n}\n\n//this function will get the same of the React components\nfunction getName(node: any, component: any, arr: Array<any>) {\n  if (!node.type || !node.type.name) {\n    // if this is an HTML tag just keep recursing without saving the name\n    if (node.child) getComponentData(node.child, arr);\n    if (node.sibling) getComponentData(node.sibling, arr);\n    return -1;\n  } else {\n    component.name = node.type.name;\n  }\n}\n\n//this functions gets all the data related to state in React fiber (and the data stored here is used later in other functions)\nfunction getState(node: any, component: any) {\n  //checking for 3 conditions (if state exists, if its a linkedlist with state, if its not a linkedlist with state)\n  //check if state exists in the node, if not just return and exit out of the function\n  if (!node.memoizedState) return;\n  // check if the state is stored as a linkedlist\n  if (node.memoizedState.memoizedState !== undefined) {\n    //check if you're at the end of the linked list chain (.next = null)\n    if (node.memoizedState.next === null) {\n      component.state = cleanState(node.memoizedState.memoizedState)\n      return;\n    }\n    // initialize array because state is a linkedlist so you can store multiple states in the array\n    component.state = [];\n    linkedListRecurse(node.memoizedState, component.state);\n    return;\n  }\n  // if the state is not stored as a linkedlist, then run the clean state function\n  component.state = cleanState(node.memoizedState)\n  function linkedListRecurse(node: any, treeArr: any[]) {\n    treeArr.push(cleanState(node.memoizedState))\n    if (node.next && node.memoizedState !== node.next.memoizedState) {\n      linkedListRecurse(node.next, treeArr)\n    }\n  }\n}\n\n//this function traverses through component.state property collected in the function getState and stores atom names\nfunction getAtom(component: Component) {\n  // if component has no state there is not atom for it so just exit from the function;\n  if (!component.state) {\n    return;\n  }\n  // Make a new empty Set\n  const atomArr = new Set();\n\n  // this will loop through component.state to get the atom data\n  for (let i = 0; i < component.state.length; i++) {\n      if (component.state[i]['current'] instanceof Set || component.state[i]['current'] instanceof Map) {\n        \n        // this code will give us the value from the existing set/map in component.state to add to our newly created set\n        const it = component.state[i]['current'].values();\n        let first = it.next();\n        atomArr.add(first.value);\n\n      }\n\n      //below code will convert the data in the create set to an array in component.atoms property, take out any duplicates, and delete the propert if no atoms exists for the component\n      component.atoms = Array.from(atomArr);\n      if (component.atoms.length === 0) {\n        delete component.atoms;\n      } else {\n        for (const el of component.atoms) {\n          if (typeof el !== 'string') {\n            let index = component.atoms.indexOf(el);\n            component.atoms.splice(index, 1);\n          }\n        }\n      }\n  }\n}\n\n//this is will get all the children and sibling components linked to the current component node and then run the recursive function getComponentData again on each child/sibling node\nfunction getChildren(node: any, component: Component, arr: any[]) {\n  const children: any[] = [];\n  //check if the node has a child, if so then run the getComponentData on that child node(s)\n  if (node.child) {\n    getComponentData(node.child, children);\n  }\n  // check if the node has a sibling, if so then run the getComponentData on that sibling node(s)\n  if (node.sibling) getComponentData(node.sibling, arr);\n  //if no more child or sibling nodes then return the children array\n  if (children.length > 0) component.children = children;\n}\n\n//this function populates atom values in the second position of the array that is sent to the front end\nfunction getAtomValues(obj: object, prop: string) {\n  const arr: any = [];\n  \n  //this function populates the array with the data as map object that is found in tree\n  function recursivelyFindProp(o: any, keyToBeFound: string) {\n    if (typeof o !== 'object' || !o) {\n      return;\n    }\n    Object.keys(o).forEach(function (key) {\n      if (key === keyToBeFound) {\n        arr.push(o[key])\n      } else {\n        if (typeof o[key] === 'object') {\n          recursivelyFindProp(o[key], keyToBeFound);\n        }\n      }\n    });\n  }\n\n  //it recurses throught nested objects and arary to find the key 'atomValues' where the atom value data is stored (the atom values are in a map object)\n  recursivelyFindProp(obj, prop);\n\n  //the skeleton structure of how the data object will look stored in the array to send to the frontend\n  interface Result {\n    atomVal: any\n  }\n\n  const result: Result = {\n    atomVal: {}\n  }\n  \n  //converting map objects where the atom value is found into the result object with a key value pair\n  for (let i = 0; i < arr.length; i++) {\n    let mapData = arr[i]\n    if (mapData) {\n      for (let [key, value] of mapData) {\n        result.atomVal[key] = value.contents;\n      }\n    }\n  }\n\n  return result;\n}\n\n//this function creates and stores the data for the selector/atom tree and stores in the 3rd position in the array sent to the frontend\nfunction getSelectorAtomLink(obj: any, prop: string) {\n  let arr: any[] = [];\n  function recursivelyFindProp(o: any, keyToBeFound: string) {\n    if (typeof o !== 'object' || !o) {\n      return;\n    }\n    Object.keys(o).forEach(function (key) {\n      if (key === keyToBeFound) {\n        arr.push(o[key])\n      } else {\n        if (typeof o[key] === 'object') {\n          recursivelyFindProp(o[key], keyToBeFound);\n        }\n      }\n    });\n  }\n\n  //this function recursively finds the key 'nodeToNodeSubscriptions' which has the data for atom to selector connections\n  recursivelyFindProp(obj, prop);\n\n  //skeleton structure of how the data will be stored in the array\n  interface SelectorTree {\n    name: string;\n    children: any[];\n  }\n\n  const result: SelectorTree = {\n    name: 'Selector Tree',\n    children: []\n  }\n\n  interface NonSelectorAtoms {\n    name: string;\n    children: any[];\n  }\n\n  const tempObj: NonSelectorAtoms = {name: 'nonSelectorAtoms', children: []}\n  result.children.push(tempObj)\n\n  //converting map data into object data to be stored\n  const newArr = arr.filter((item, index) => arr.indexOf(item) === index)\n  for (let i = 0; i < newArr.length; i++) {\n    let mapData = newArr[i]\n    if (mapData) {\n      for (let [key, value] of mapData) {\n        let tempArr = [...value]\n        for (let el of tempArr) {\n\n          let tempObj: SelectorTree = {\n            name: '',\n            children: []\n          }\n          tempObj.name = el;\n\n          interface TreeValObj {\n            name: string;\n            value: number;\n          }\n          \n          const treeValObj = {\n            name: key,\n            value: 100\n          }\n\n          tempObj.children.push(treeValObj);\n          result.children.push(tempObj);\n        }\n      }\n    }\n  }\n\n  let atomsAndSelectors: any = [];\n  //finds all the atoms with selector connetions and compares if there are any atom names that exist in the component tree that do not show up in the 'nodeToComponentSubscriptions' because those are the atoms with no selectors\n  function getNonSelectorAtoms(result: any, obj: any) {\n    //below function finds the atom/selector data found in 'nodeToComponentSubscriptions' key\n    findNested(obj, 'nodeToComponentSubscriptions')\n    if(atomsAndSelectors.length > 0) {\n      let atomsAndSelectorsArr = Array.from(atomsAndSelectors[0].keys());\n      for (const el of atomsAndSelectorsArr) {\n\n        if (!doesNestedValueExist(result, el)) {\n          result.children[0].children.push({name: el, value: 100});\n        } \n\n      }\n    }\n  }\n\n  //checks if a value exits in a nested object\n  function doesNestedValueExist(obj: any, text: any): boolean {\n    let exists = false;\n    let keys = Object.keys(obj);\n    for(let i = 0; i < keys.length; i++) {\n      let key = keys[i];\n      let type = typeof obj[key];\n      if(type === 'object') {\n        exists = doesNestedValueExist(obj[key], text);\n      } \n      else if(type === 'string') {\n        exists = obj[key].indexOf(text) > -1;\n      }\n      if(exists) {\n        break;\n      }\n    }\n    return exists;\n  };\n\n  //returns the data that exists for the key value that is in keyToBeFound input in a nested object\n  function findNested(o: any, keyToBeFound: string) {\n    if (typeof o !== 'object' || !o) {\n      return;\n    }\n    Object.keys(o).forEach(function (key) {\n      if (key === keyToBeFound) {\n        atomsAndSelectors.push(o[key]);\n      } else {\n        if (typeof o[key] === 'object') {\n          findNested(o[key], keyToBeFound);\n        }\n      }\n    });\n  }\n  //this function recursively finds atoms that have no selectors\n  getNonSelectorAtoms(result, obj)\n  return result;\n}\n\n//this function cleans the state data for component.state property (this function is run inside getState function)\nfunction cleanState(stateNode: any, depth = 0) {\n  let result: any;\n  if (depth > 10) return \"Max recursion depth reached!\"\n  //checking if the stateNode is not an object or function, if it is not either return the stateNode\n  if (typeof stateNode !== 'object' && typeof stateNode !== 'function') return stateNode;\n\n  if (stateNode === null) {\n    return null;\n  }\n  if (typeof stateNode === 'object') {\n    //when using useRecoilValue atoms are saved as set - checking for atom data\n    if (stateNode instanceof Set) {\n      return stateNode;\n    }\n    if (stateNode instanceof Map) {\n      return stateNode;\n    }\n    if (stateNode.$$typeof && typeof stateNode.$$typeof === 'symbol') {\n      return stateNode.type && typeof stateNode.type !== 'string' ? `<${stateNode.type.name} />` : 'React component';\n    }\n    if (Array.isArray(stateNode)) {\n      result = [];\n      stateNode.forEach((el, index) => {\n        if (el !== null) {\n          result[index] = cleanState(el, depth + 1)\n        } else {\n          result[index] = el;\n        }\n      })\n    } else {\n      result = {};\n      Object.keys(stateNode).forEach((key) => {\n        result[key] = cleanState(stateNode[key], depth + 1)\n      });\n    }\n    return result;\n  }\n  if (typeof stateNode === 'function') {\n    return `function: ${stateNode.name}()`;\n  }\n}\n\n//the function that sends the array with the necessary tree data to the frontend\nfunction sendToContentScript(obj: any) {\n  const tree = JSON.parse(JSON.stringify(obj));\n  window.postMessage({ tree }, '*');\n}\n\n//the patcher function is invoked one time when the app first runs to modify the onCommitFiberRoot function in React devTools to extract React Fiber\npatcher();"
  },
  {
    "path": "extension/frontend/create-panel.js",
    "content": "/* eslint-disable no-use-before-define */\n// This creates the dev tools panel using the panel.html file as the template\n\nchrome.devtools.panels.create(\n    'Recoil', // title\n    '', // icon\n    './view.html' // content\n  );"
  },
  {
    "path": "extension/frontend/devtools-root.html",
    "content": "\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  <meta charset=\"UTF-8\">\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n  <title>Test Title</title>\n</head>\n<body>\n  <!-- This file is references from manifest.json -->\n  <!-- Loads script devtools.js where the panel is actually created-->\n  <!-- ***** This HTML is not used - see view.html instead! **** -->\n  <h1>MAKE ME THE HTML</h1>\n  <script src=\"./create-panel.js\"></script>\n</body>\n</html>"
  },
  {
    "path": "extension/frontend/view/Components/left-view/GraphPanel.js",
    "content": "import React, { useEffect, useState } from 'react';\nimport {\n  BrowserRouter as Router,\n  Switch,\n  Route,\n  Link,\n  Redirect\n} from \"react-router-dom\";\n\nimport SelectorTree from './SelectorTree'\nimport TreeView from './treeView';\n\n\nconst GraphPanel = (props) => {\n  const [view, setView] = useState(true);\n  const [viewName, setviewName] = useState('COMPONENT TREE')\n\n  const changeView = () => {\n    setView(!view);\n\n\n    if (viewName === 'COMPONENT TREE') {\n      setviewName('SELECTOR TREE')\n    } else {\n      setviewName('COMPONENT TREE')\n    }\n  }\n\n  return (\n    <div className='graph-container'>\n      <h1 className='h1-absolute' >{viewName}</h1>\n      <button onClick={changeView} className='graph-button-1'>Change View</button>\n      {view ? <TreeView tree={props.tree} /> : <SelectorTree tree={props.tree} />}\n    </div>\n  )\n};\n\nexport default GraphPanel;"
  },
  {
    "path": "extension/frontend/view/Components/left-view/SelectorTree.js",
    "content": "import React, { useEffect, useState, useRef } from 'react';\nimport * as d3 from '../../../../libraries/d3';\n\n/*\n instruction to swap trees\n change flare to data\n change the place it targets on the DOM\n*/\n\n\nexport const SelectorTree = (props) => {\n\n  useEffect(() => {\n    if (props.tree) {\n\n      console.log('props tree', props.tree[2])\n      document.querySelector('#canvas').innerHTML = ''\n\n      // const colorLegends = document.querySelector('#canvas');\n      // const title = document.createElement('h1');\n      // title.innerHTML = 'blue: selectors \\n ligherblue: subscribers';\n      // colorLegends.appendChild(title);\n\n      var colorList = {Selectors: '#7289da', Subscribers: '#7289da'};\n\n      const colorize = function(colorList) {\n          var container = document.querySelector('#canvas');\n          var parentContainer = document.createElement(\"DIV\");\n          parentContainer.className = 'legend';\n          for (var key in colorList) {\n              var boxContainer = document.createElement(\"DIV\");\n              var box = document.createElement(\"DIV\");\n              var label = document.createElement(\"DIV\");\n\n              label.innerHTML = key;\n              box.className = \"box\";\n              box.style.backgroundColor = colorList[key];\n              if(key === 'Selectors') {\n                box.style.opacity = 1;\n              } else {\n                box.style.opacity = 0.3;\n              }\n\n              boxContainer.appendChild(box);\n              boxContainer.appendChild(label);\n\n              parentContainer.appendChild(boxContainer);\n              container.appendChild(parentContainer);\n\n        }\n      }\n\n      colorize(colorList);\n\n      // -------------------------------------------\n\n      // global constant variables that will be used\n\n      const partition = data => {\n        const root = d3.hierarchy(data)\n\n          .sum(d => d.value)\n        // .sort((a, b) => b.value - a.value);\n        return d3.partition()\n          .size([2 * Math.PI, root.height + 1])\n          (root);\n      }\n\n      const myColor = d3.scaleOrdinal().domain(props.tree[2]).range(['#7289da']);\n\n      // color number or stringNum input into rgb(num1, num2, num3)\n      // const color = d3.scaleOrdinal(d3.quantize(d3.interpolateRainbow, props.tree[2].children.length + 1))\n      // console.log('color: ', color('12'));\n\n      // formats number or stringNum input into chunks of 3 digits, 123456 -> '123,456'\n      const format = d3.format(\",d\");\n      // console.log('format: ', format('123456'))\n\n      const width = 932; // 932/1200\n      const radius = width / 6; // always divide by 6\n\n\n      const arc = d3.arc()\n        .startAngle(d => d.x0)\n        .endAngle(d => d.x1)\n        .padAngle(d => Math.min((d.x1 - d.x0) / 2, 0.005))\n        .padRadius(radius * 1.5)\n        .innerRadius(d => d.y0 * radius)\n        .outerRadius(d => Math.max(d.y0 * radius, d.y1 * radius - 1));\n\n      // --------------------end of Global Constants-------------------------------\n\n\n\n      // ---------  start here  ---------------------\n\n\n      // change flare to data: there are 2 places\n      const root = partition(props.tree[2]);\n\n      // root.attr('value', d => 100);\n      console.log('root: ', root);\n\n      // root.each(d => d.current = d);\n      root.each(d => {\n        // console.log('d current: ', d.current);\n        // this will log undefined\n        return d.current = d;\n      });\n\n\n      //  ----- creates svg/canvas -----\n\n      const svg = d3.select('#canvas')\n        .append('svg')\n        // .attr(\"viewBox\", [0, 0, width * 10, width * 10])\n        .attr(\"viewBox\", [0, 0, width + 70, width + 70])\n        .style(\"font\", \"10px sans-serif\")\n\n\n      // g tag allows us to grab a whole of inner tags/elements \n      // then allowing us to do group transformation with them\n      // as a 'group'\n      // const g is the handle/variable name for that group of elements\n      const g = svg.append(\"g\")\n        .attr(\"transform\", `translate(${width / 2},${width / 2})`);\n\n      //  ----- create svg ends -----\n\n\n      //  ----- create paths -----\n\n      const path = g.append(\"g\")\n        .selectAll(\".patharc\")\n        .data(root.descendants().slice(1))\n        .join(\"path\")\n        .attr('class', 'patharc')\n        .attr(\"fill\", d => { while (d.depth > 1) d = d.parent; return myColor(d.data.name); })\n        .attr(\"fill-opacity\", d => arcVisible(d.current) ? (d.children ? 1 : 0.35) : 0)\n        .attr(\"d\", d => arc(d.current));\n\n      // ----- filters into inner elements, allows 'zoom' -----\n      path.filter(d => d.children)\n        .style(\"cursor\", \"pointer\")\n        .on(\"click\", clicked);\n\n      path.append(\"title\")\n        .text(d => `${d.ancestors().map(d => d.data.name).reverse().join(\"/\")}`);\n      // .text(d => `${d.ancestors().map(d => d.data.name).reverse().join(\"/\")}\\n${format(d.value)}`);\n\n      //  ----- create paths ends -----    \n\n\n      //  ----- create labels -----\n\n      const label = g.append(\"g\")\n        .attr(\"pointer-events\", \"none\")\n        .attr(\"text-anchor\", \"middle\")\n        .style(\"user-select\", \"none\")\n        .selectAll(\"text\")\n        .data(root.descendants().slice(1))\n        .join(\"text\")\n        .attr(\"dy\", \"25\")  // need dy for text wrapping\n        .attr(\"fill-opacity\", d => +labelVisible(d.current))\n        .attr(\"transform\", d => labelTransform(d.current))\n        .text(d => d.data.name)\n        .attr('class', 'arclabels')  // label for css styling\n        // .call(wrap, 200)\n      // .style('font-size', '25px')\n\n      //  ----- create labels ends -----\n\n\n\n      //  ----- create top most level circle -----\n\n      const parent = g.append(\"circle\")\n        .datum(root)\n        .attr(\"r\", radius)\n        .attr('class', 'selectorTreeHomeBtn')\n        .attr(\"fill\", \"steelblue\")\n        .attr(\"pointer-events\", \"all\")\n        .on(\"click\", clicked)\n\n      // can work on getting name to center of parent circle\n      // .text(d => d.data.name)\n      // coming back to work on this\n      parent.append('title')\n        .text('Go Back');\n\n      //  ----- create top most level circle ends -----\n\n\n      //  ----- 4 event handling functions -----\n\n\n      function clicked(p) {\n        parent.datum(p.parent || root);\n\n        root.each(d => d.target = {\n          x0: Math.max(0, Math.min(1, (d.x0 - p.x0) / (p.x1 - p.x0))) * 2 * Math.PI,\n          x1: Math.max(0, Math.min(1, (d.x1 - p.x0) / (p.x1 - p.x0))) * 2 * Math.PI,\n          y0: Math.max(0, d.y0 - p.depth),\n          y1: Math.max(0, d.y1 - p.depth)\n        });\n\n        const t = g.transition().duration(750);\n\n        // Transition the data on all arcs, even the ones that aren’t visible,\n        // so that if this transition is interrupted, entering arcs will start\n        // the next transition from the desired position.\n        path.transition(t)\n          .tween(\"data\", d => {\n            const i = d3.interpolate(d.current, d.target);\n            return t => d.current = i(t);\n          })\n          .filter(function (d) {\n            return +this.getAttribute(\"fill-opacity\") || arcVisible(d.target);\n          })\n          .attr(\"fill-opacity\", d => arcVisible(d.target) ? (d.children ? 1 : 0.35) : 0)\n          .attrTween(\"d\", d => () => arc(d.current));\n\n        label.filter(function (d) {\n          return +this.getAttribute(\"fill-opacity\") || labelVisible(d.target);\n        }).transition(t)\n          .attr(\"fill-opacity\", d => +labelVisible(d.target))\n          .attrTween(\"transform\", d => () => labelTransform(d.current));\n      }\n\n\n      function arcVisible(d) {\n        return d.y1 <= 3 && d.y0 >= 1 && d.x1 > d.x0;\n      }\n\n      function labelVisible(d) {\n        return d.y1 <= 3 && d.y0 >= 1 && (d.y1 - d.y0) * (d.x1 - d.x0) > 0.03;\n      }\n\n      function labelTransform(d) {\n        const x = (d.x0 + d.x1) / 2 * 180 / Math.PI;\n        const y = (d.y0 + d.y1) / 2 * radius;\n        return `rotate(${x - 90}) translate(${y},0) rotate(${x < 180 ? 0 : 180})`;\n      }\n\n      // line 230 238 toggle between px or em wrap\n      // extra personalized wrap util for wrapping text inside circular arc\n      // function wrap(text, width) {\n      //   text.each(function () {\n      //     let text = d3.select(this),\n      //       // .text().match(/[A-Z][a-z]+|[0-9]+/g).join(\" \");\n      //       // words is a string\n      //       words = text.text();\n      //     words = words.replace(words[0], words[0].toUpperCase());\n      //     console.log(words);\n      //     console.log(typeof words);\n      //     words = words\n      //       .match(/[A-Z][a-z]+|[0-9]+/g).join(\" \")\n      //       .split(/\\s+/).reverse();\n      //     // console.log(words);\n      //     let word,\n      //       line = [],\n      //       lineNumber = 0,\n      //       lineHeight = 1, // ems\n      //       y = text.attr(\"y\"),\n      //       dy = parseFloat(text.attr(\"dy\")),\n      //       tspan = text.text(null).append(\"tspan\").attr(\"x\", 0).attr(\"y\", y).attr(\"dy\", dy + \"px\");\n      //     while (word = words.pop()) {\n      //       line.push(word);\n      //       tspan.text(line.join(\" \"));\n      //       if (tspan.node().getComputedTextLength() > width) {\n      //         line.pop();\n      //         tspan.text(line.join(\" \"));\n      //         line = [word];\n      //         tspan = text.append(\"tspan\").attr(\"x\", 0).attr(\"y\", y).attr(\"dy\", ++lineNumber * lineHeight + dy + \"px\").text(word);\n      //       }\n      //     }\n      //   });\n      // }\n\n\n      //  ----- event handling functions ends -----\n\n\n\n      // -------------------------------------------------      \n\n\n    }\n  })\n\n  return (\n    <div id='canvas'>\n      {/* <div id='canvas'></div> */}\n    </div>\n  )\n}\n\nexport default SelectorTree;"
  },
  {
    "path": "extension/frontend/view/Components/left-view/treeView.js",
    "content": "import React, { useEffect, useState, useRef } from 'react';\nimport * as d3 from '../../../../libraries/d3.js';\nimport { scaleBand } from 'd3';\n\n\n\nexport const TreeView = (props) => {\n    const [atomhover, setatomhover] = useState([])\n\n    // on each state change, a tree will be rendered with all its nodes and links\n    useEffect(() => {\n        if (props.tree) {\n\n            document.querySelector('#canvas').innerHTML = ''\n\n            const root = d3.hierarchy(props.tree[0])\n            const panelWidth = Math.floor(window.innerWidth * 0.5);\n\n            // Find out the height of the tree and size the svg accordingly \n            const dataHeight = root.height;\n            const treeHeight = dataHeight * 200;\n            const svgHeight = Math.max(treeHeight, window.innerHeight)\n\n            const svg = d3.select('#canvas')\n                .append('svg')\n                .attr('width', panelWidth)\n                .attr('height', svgHeight + 80)\n                .call(d3.zoom()\n                    .scaleExtent([.25, 8])\n                    // .translateExtent([[-3000, -4000], [3000, 4000]])\n                    .on('zoom', function () {\n                        svg.attr('transform', d3.event.transform)\n                    })\n                )\n                .attr('class', 'component-svg')\n                .append('g')\n\n            // if windowheight is greater or less than 600, place tree in different place on screen\n            if (window.innerHeight > 600) {\n                svg.attr('transform', 'translate(20,100)scale(.5,.5)')\n            } else {\n                svg.attr('transform', 'translate(200,-20)scale(.5,.5)')\n            }\n\n            let tree = d3.tree().size([panelWidth - 80, treeHeight]);\n            tree(root)\n\n            // creates nodes\n            const nodes = root.descendants()\n            const node = svg.selectAll('.node')\n                .data(nodes)\n                .enter()\n                .append('g')\n                .attr('class', 'node')\n                .attr('transform', (d) => 'translate(' + d.y + ',' + d.x + ')')\n                .attr('cursor', 'pointer')\n\n\n            // creates circle\n            node.append('circle')\n                .attr('class', 'componentTreeNode')\n                .attr('r', 5)\n                // .attr('fill', 'steelblue')\n                .attr('fill', 'rgb(244, 244, 244)')\n\n            // creates text\n            node.append('text')\n                .attr(\"dy\", \"0.31em\")\n                .attr(\"x\", d => d._children ? -6 : 6)\n                // .attr('fill', '#F0DB4F')\n                .attr('fill', 'rgb(244, 244, 244)')\n                .style('font-size', '22px')\n                .attr(\"text-anchor\", d => d._children ? \"end\" : \"start\")\n                .text(function (d) {\n                    return d.data.name\n                })\n\n            // on mouseover/mouseout set atomhover to an array with name of atoms/component\n            node.on('mouseover', (e) => {\n                const atoms = e.data.atoms\n                const name = e.data.name\n                setatomhover([atoms, name])\n            })\n            node.on('mouseout', (e) => {\n                setatomhover([])\n            })\n\n            // create links connecting all the nodes\n            const links = root.links()\n            const link = svg.selectAll('.link')\n                .data(links)\n                .join('path')\n                .attr('class', 'link')\n                .attr('d', d3.linkVertical()\n                    // swap places of dx and dy, to change orientation of tree\n                    .x(d => d.y)\n                    .y(d => d.x))\n                .attr(\"fill\", \"none\")\n                .attr(\"stroke\", \"white\")\n                .attr(\"stroke-opacity\", 0.4)\n                .attr(\"stroke-width\", 1.5)\n        }\n    }, [props.tree])\n\n\n    return (\n        <div>\n            <div id='atom-hover'>\n                {atomhover[0] ? <h1> Atoms: {JSON.stringify(atomhover[0])}</h1> : <h1> </h1>}\n                {atomhover[1] ? <h1> Name: {atomhover[1]}</h1> : <h1></h1>}\n            </div>\n            <div id='canvas'></div>\n\n        </div>\n\n    )\n}\n\nexport default TreeView;"
  },
  {
    "path": "extension/frontend/view/Components/right-view/History.js",
    "content": "import React, { useEffect, useRef } from 'react';\nimport JSONPretty from 'react-json-pretty';\n\nconst History = ({ history }) => {\n  // scroll to bottom of history\n  const messagesEnd = useRef(null);\n  const scrollToBottom = () => {\n    messagesEnd.current.scrollIntoView({ block: 'end', behavior: 'smooth', inline: 'nearest' })\n  }\n\n  useEffect(() => {\n    const historyInfo = document.getElementById('history-info');\n    historyInfo.scrollTop = historyInfo.scrollHeight;\n  }, []);\n\n  useEffect(scrollToBottom, [history]);\n\n  const historyMap = history.map((hist) => {\n    // get the atoms and state data \n    let snap;\n    if (hist.tree[1].atomVal) {\n      snap = hist.tree[1].atomVal;\n    }\n    const data = <JSONPretty data={snap}></JSONPretty>\n    return <summary><p className=\"blue\">History {hist.count}: </p>{data}</summary>\n  });\n\n  return (\n    <div id=\"history-tab\">\n      <div id=\"history-info\">\n        <p id='json'></p>\n        {historyMap}\n        <div ref={messagesEnd}></div>\n      </div>\n    </div >\n  )\n}\n\nexport default History;"
  },
  {
    "path": "extension/frontend/view/Components/right-view/Navbar.js",
    "content": "import React from 'react';\nimport {\n  BrowserRouter as Router,\n  Switch,\n  Route,\n  Link,\n  NavLink\n} from \"react-router-dom\";\nimport History from './History'\nimport AtomView from './atomView'\n\nconst Navbar = (props) => (\n  <Router>\n    <header className='navbar'>\n      <div id='link-container'>\n        <NavLink activeClassName='a-right-active' className='a-right' to=\"/h\">ATOM VALUES</NavLink>\n        <NavLink activeClassName='a-right-active' className='a-right no-border-left' to=\"/tab2\">HISTORY</NavLink>\n      </div>\n      <Switch>\n        <Route path=\"/tab2\">\n          <History tree={props.tree} history={props.history} />\n        </Route>\\\n        <Route path=\"/h\">\n          <AtomView tree={props.tree} />\n        </Route>\n        <Route path=\"/\">\n          <AtomView tree={props.tree} />\n        </Route>\n      </Switch>\n    </header>\n  </Router>\n);\n\nexport default Navbar;"
  },
  {
    "path": "extension/frontend/view/Components/right-view/atomView.js",
    "content": "import React from 'react';\nimport * as d3 from '../../../../libraries/d3.js';\nimport JSONPretty from 'react-json-pretty';\n\n\n\nexport const AtomView = ({ tree }) => {\n    const atomSelectors = []\n    let originalColor;\n\n    let t = d3.transition()\n        .duration(1000)\n        .ease(d3.easeLinear);\n\n\n    // traverses through D3 tree and if a node includes the h3 inner html tag, that node will light up\n    function lightup(e) {\n        let atom = e.target.innerHTML\n        d3.selectAll('.componentTreeNode').style('fill', originalColor).attr('r', 5)\n        d3.select('#canvas').selectAll('.node').each(function (e) {\n            if (!e.data.atoms) { }\n            else if (e.data.atoms.includes(atom)) {\n                d3.select(this).select('.componentTreeNode').transition(t).style('fill', 'rgb(240, 219, 79)').attr('r', 10.5)\n            }\n        })\n        atomValLightup(e);\n    }\n\n    function atomValLightup(e) {\n        Array.from(document.querySelectorAll('.h3-display-inline')).forEach(el => {\n            el.style.color = '#f4f4f4';\n        })\n        let atom = e.target\n        console.log('firing function: ', atom)\n        atom.style.color = '#F0DB4F';\n    }\n\n    // will iterate through atoms object and render it on screen \n    // each prop render should have its unique key\n    if (tree) {\n        const atoms = tree[1].atomVal\n        for (let prop in atoms) {\n            const data = <JSONPretty style={{ fontSize: \"3px\" }} data={atoms[prop]}></JSONPretty>\n            atomSelectors.push(\n                <div className='atom-container' >\n                    <h3 className='h3-display-inline' onClick={lightup}>{prop}</h3>\n                    <div className='atom-div'>\n                        <details className='s-margin'>\n                            <summary>State</summary>\n                            <p>{data}</p>\n                        </details>\n                    </div>\n                </div>\n            )\n        }\n    }\n\n    return (\n        <div className=\"atom-values-tab\">\n            <div className='atoms'>{atomSelectors}</div>\n        </div>\n    )\n}\n\nexport default AtomView;"
  },
  {
    "path": "extension/frontend/view/Container.js",
    "content": "import React, { useEffect, useState } from 'react';\nimport Navbar from './Components/right-view/Navbar'\nimport GraphPanel from './Components/left-view/GraphPanel'\nimport * as d3 from '../../libraries/d3'\nconst port = chrome.runtime.connect({ name: 'test' })\n\n\nconst Container = () => {\n  const [tree, setTree] = useState();\n  const [history, setHistory] = useState([]);\n  const [count, setCount] = useState(1);\n\n  // function is receiving fibernode state changes from backend and is saving that data to tree hook\n  useEffect(() => {\n    port.postMessage({\n      name: 'connect',\n      tabID: chrome.devtools.inspectedWindow.tabId,\n    })\n\n    port.onMessage.addListener((message) => {\n      if (message.length === 3) {\n        setTree(message)\n      }\n    })\n  }, [])\n\n\n  // parsing information for history tab\n  useEffect(() => {\n    let lastHistory;\n    let stringTree = tree ? JSON.stringify(tree[1].atomVal) : null;\n    if (history.length) {\n      lastHistory = JSON.stringify(history[history.length - 1].tree[1].atomVal);\n    }\n    if (lastHistory == stringTree) return;\n    if (history.length === 10) {\n      const historyCopy = [...history]\n      historyCopy.shift();\n      setHistory([...historyCopy, { count, tree }]);\n    } else {\n      setHistory([...history, { count, tree }]);\n    }\n    setCount(count + 1);\n  }, [tree])\n\n  return (\n    <div id='main-container'>\n      <GraphPanel tree={tree} />\n      <Navbar tree={tree} history={history} />\n    </div>\n  )\n}\n\nexport default Container"
  },
  {
    "path": "extension/frontend/view/style.css",
    "content": "\n\n* {\n  margin: 0px;\n  padding: 0px;\n  background-color: rgb(53, 59, 70);\n  font-size: 18px;\n  overflow-y: hidden;\n  overflow-x: hidden;\n  font-family: 'Roboto', sans-serif;\n  color: #f4f4f4;\n}\n\n.a-right {\n  text-decoration: none;\n  color: black;\n  width: 100%;\n  border: black solid 2px;\n}\n\nsvg {\n  background-color: rgb(53, 59, 70);\n  width:100%;\n  height:500px;\n  margin-top: 10%;\n  margin-left: 5%;\n}\n\n@media  (max-height: 800px){\n  svg {\n    height: 40%;\n    font-size: 100px;\n    margin-top: 2%;\n  }\n\n  .component-svg {\n    height: 100%;\n  }\n \n}\n\n@media (max-width: 1300px){\n  .atoms {\n    width: 98% !important;\n  }\n}\n  \n.component-svg {\n  background-color: rgb(53, 59, 70);\n  border-right: solid black 1px;\n  width:100%;\n  height:100%;\n  margin: 0;\n}\n\ncircle {\n  fill: #fff;\n  /* fill: none; */\n  stroke: #444857;\n  stroke-width: 1px;\n  pointer-events: all;\n}\n\n\n\n/* inside main container: canvas and navbar*\n    *now its graphDisplays and navbar\n   basically, the navbar is the info display panel\n*/\n\n/* CONTAINER.JS  */\n#main-container {\n  display: flex;\n}\n\n/* CANVAS */\n\n#canvas {\n  margin: 0;\n  width: 100%;\n  height: 100%;\n  \n}\n\n#canvas:hover {\n  cursor: move;\n}\n\n/* LEFT VIEW GRAPHPANEL */\n\n.graph-button-1 {\n  position: absolute;\n  top: 2%;\n  right: 36%;\n  padding: 2px;\n  background: none;\n  background-color: #444857;\n  font-family: inherit;\n  font-size: 14px;\n  border: 2px solid rgb(0, 0, 0);\n  border-radius: 8px;\n  color: #f4f4f4;\n  cursor: pointer;\n  display: inline-block;\n  margin: 5px 15px;\n  text-transform: uppercase;\n  letter-spacing: 1px;\n  font-weight: 500;\n  width: 15%;\n  -webkit-transition: all 0.3s;\n  -moz-transition: all 0.3s;\n  transition: all 0.3s;\n  box-shadow: 1px 1px black;\n}\n\n.graph-button-1:focus {\n  outline:none;\n}\n\nbutton:hover {\n  color: #F0DB4F;\n }\n   \n\n\n.graph-container {\n  width: 65%;\n  margin: 0;\n}\n\n\n.h1-absolute {\n  position: absolute;\n  left: 1%;\n  top: 2%;\n\n}\n\n/* RIGHT VIEW NAVBAR */\n\n.a-right {\n  margin: 10px 5px 0px 5px;\n  text-decoration: none;\n  color: white;\n  width: 100%;\n  border:black solid 2px;\n  border-radius: 10px;\n  padding: 4px;\n  font-size: 25px;\n  background-color: #444857;\n  box-shadow: 1px 1px black;\n}\n\n.a-right:hover {\n  color: #F0DB4F;\n  transition: all .3s;\n}\n\n\n.a-right-active {\n  color: #F0DB4F;\n}\n\n.navbar {\n  margin: 0;\n  width: 35%;\n  border: 2px solid #333642;\n  border-left: 2px solid black;\n}\n  \n.navbaritem {\n  width: 100%;\n  font-size: 26px;\n  background-color: rgb(53, 59, 70);\n}\n\n.navbaritem:hover {\n  color: #f4f4f4;\n}\n\n.navbaritem:active {\n  color: black;\n}\n\n\n#link-container {\n  display: flex;\n  width: 100%;\n  text-align: center;\n  font-size: 20px;\n  margin: auto;\n  padding-right: 15px;\n  justify-content: space-around;\n  padding-bottom: 10px;\n  /* border-bottom: 2px solid black; */\n}\n\n\n/* RIGHT VIEW ATOM.JS */\n.atom-values-tab {\n  height: 105vh;\n  margin: auto;\n  max-height: 87vh;\n  overflow-y: scroll;\n  border-top: 2px solid black;\n  background-color: #444857;\n}\n\n.atom-container {\n  box-shadow: 1px 1px black;\n  border: 2px black solid;\n  border-radius: 10px;\n  padding: 10px;\n  margin-top: 10px;\n}\n\n.atom-div  {\n  max-height: 50vh;\n  padding: 8px;\n  display: flex;\n}\n\n.atoms {\n  width: 80%;\n  text-align: left;\n  margin-top: 5px;\n  margin: auto;\n  padding-left: 5px;\n  padding-right: 5px;\n  background-color: #444857;\n}\n\n#atom-hover {\n  position: absolute;\n  left: 1%;\n  top: 8%;\n}\n\n.h3-display-inline{\n  display: inline-block;\n}\n\n.h3-display-inline:hover {\n  cursor: pointer;\n  color: #F0DB4F;\n  transition: all .3s;\n}\n\n.h3-display-inline:active {\n  color: #F0DB4F;\n}\n\n.s-margin {\n  width: 100%;\n  overflow-y: auto;\n}\n\n\n/* RIGHT VIEW HISTORY.JS*/\n\n#history-info {\n  overflow-x: hidden;\n  overflow-y: scroll;\n  height: 80%;\n}\n\n#history-tab {\n  height: 105vh;\n  margin-top: 10px;\n  margin-left: 10px;\n}\n\n.__json-pretty__ {\n  font-size: 12px;\n}\n\n.__json-key__ {\n  font-size: 12px;\n}\n\n.__json-string__ {\n  font-size: 12px;\n}\n\n.__json-value__ {\n  font-size: 12px;\n}\n.__json-boolean__ {\n  font-size: 12px;\n}\n.__json-error__ {\n  font-size: 12px;\n}\n.__json-main__ {\n  font-size: 12px;\n}\n\n.__json-pretty-error__ {\n  font-size: 12px;\n}\n\n/* SCROLL BAR STYLING */\n::-webkit-scrollbar {\n  width: 12px;  /* for vertical scrollbars */\n  height: 12px; /* for horizontal scrollbars */\n}\n\n::-webkit-scrollbar-track {\n  background: #f4f4f4;\n}\n\n::-webkit-scrollbar-thumb {\n  background: rgba(0, 0, 0, 0.5);\n}\n\n\nsummary {\n  list-style-image: url(right-arrow.svg);\n  outline: none;\n}\n\nsummary:hover {\n  cursor: pointer;\n}\n\n\n\n\n\n/* selector tree css vvv */\n\n.patharc {\n  /* fill: #7289DA; */\n  /* opacity: 0.3; */\n  stroke: #f4f4f4;\n  stroke-width: 3px;\n}\n\n.arclabels {\n  fill: white;\n}\n\n.selectorTreeHomeBtn {\n  fill: none;\n  stroke: #f4f4f4;\n  stroke-width: 5px;\n}\n\n/* font-size does not work in arclabels */\ntspan {\n  font-size: 1.25em;\n}\n\n\n/* selector tree css ^^^ */\n\n\n.blue {\n  color: #F0DB4F;\n}\n\n.legend {\n  position: absolute;\n  left: 1%;\n  top: 10%;\n}\n\n.box {\n  width: 15px;\n  height: 15px;\n  border: 1px solid black;\n}\n\n"
  },
  {
    "path": "extension/frontend/view/view.html",
    "content": "<!DOCTYPE html>\n<html lang=\"en\">\n\n<head>\n  <meta charset=\"UTF-8\">\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n  <link rel=\"stylesheet\" href=\"style.css\">\n  <link href=\"https://fonts.googleapis.com/css2?family=Roboto&display=swap\" rel=\"stylesheet\">\n  <title>TotalRecoilJS</title>\n</head>\n\n<body>\n\n  <div id=\"root\"></div>\n  <script src=\"bundle.js\"></script>\n</body>\n\n</html>"
  },
  {
    "path": "extension/frontend/view/view.js",
    "content": "import React from 'react';\nimport ReactDOM from 'react-dom';\nimport Container from './Container'\n\n\nconst App = () => {\n  return (\n    <div id=\"container-wrapper\">\n      <Container />\n    </div>\n  )\n}\nReactDOM.render(<App />, document.getElementById('root'))\n\n"
  },
  {
    "path": "extension/libraries/d3.js",
    "content": "// https://d3js.org v5.16.0 Copyright 2020 Mike Bostock\n(function (global, factory) {\ntypeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\ntypeof define === 'function' && define.amd ? define(['exports'], factory) :\n(global = global || self, factory(global.d3 = global.d3 || {}));\n}(this, function (exports) { 'use strict';\n\nvar version = \"5.16.0\";\n\nfunction ascending(a, b) {\n  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;\n}\n\nfunction bisector(compare) {\n  if (compare.length === 1) compare = ascendingComparator(compare);\n  return {\n    left: function(a, x, lo, hi) {\n      if (lo == null) lo = 0;\n      if (hi == null) hi = a.length;\n      while (lo < hi) {\n        var mid = lo + hi >>> 1;\n        if (compare(a[mid], x) < 0) lo = mid + 1;\n        else hi = mid;\n      }\n      return lo;\n    },\n    right: function(a, x, lo, hi) {\n      if (lo == null) lo = 0;\n      if (hi == null) hi = a.length;\n      while (lo < hi) {\n        var mid = lo + hi >>> 1;\n        if (compare(a[mid], x) > 0) hi = mid;\n        else lo = mid + 1;\n      }\n      return lo;\n    }\n  };\n}\n\nfunction ascendingComparator(f) {\n  return function(d, x) {\n    return ascending(f(d), x);\n  };\n}\n\nvar ascendingBisect = bisector(ascending);\nvar bisectRight = ascendingBisect.right;\nvar bisectLeft = ascendingBisect.left;\n\nfunction pairs(array, f) {\n  if (f == null) f = pair;\n  var i = 0, n = array.length - 1, p = array[0], pairs = new Array(n < 0 ? 0 : n);\n  while (i < n) pairs[i] = f(p, p = array[++i]);\n  return pairs;\n}\n\nfunction pair(a, b) {\n  return [a, b];\n}\n\nfunction cross(values0, values1, reduce) {\n  var n0 = values0.length,\n      n1 = values1.length,\n      values = new Array(n0 * n1),\n      i0,\n      i1,\n      i,\n      value0;\n\n  if (reduce == null) reduce = pair;\n\n  for (i0 = i = 0; i0 < n0; ++i0) {\n    for (value0 = values0[i0], i1 = 0; i1 < n1; ++i1, ++i) {\n      values[i] = reduce(value0, values1[i1]);\n    }\n  }\n\n  return values;\n}\n\nfunction descending(a, b) {\n  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;\n}\n\nfunction number(x) {\n  return x === null ? NaN : +x;\n}\n\nfunction variance(values, valueof) {\n  var n = values.length,\n      m = 0,\n      i = -1,\n      mean = 0,\n      value,\n      delta,\n      sum = 0;\n\n  if (valueof == null) {\n    while (++i < n) {\n      if (!isNaN(value = number(values[i]))) {\n        delta = value - mean;\n        mean += delta / ++m;\n        sum += delta * (value - mean);\n      }\n    }\n  }\n\n  else {\n    while (++i < n) {\n      if (!isNaN(value = number(valueof(values[i], i, values)))) {\n        delta = value - mean;\n        mean += delta / ++m;\n        sum += delta * (value - mean);\n      }\n    }\n  }\n\n  if (m > 1) return sum / (m - 1);\n}\n\nfunction deviation(array, f) {\n  var v = variance(array, f);\n  return v ? Math.sqrt(v) : v;\n}\n\nfunction extent(values, valueof) {\n  var n = values.length,\n      i = -1,\n      value,\n      min,\n      max;\n\n  if (valueof == null) {\n    while (++i < n) { // Find the first comparable value.\n      if ((value = values[i]) != null && value >= value) {\n        min = max = value;\n        while (++i < n) { // Compare the remaining values.\n          if ((value = values[i]) != null) {\n            if (min > value) min = value;\n            if (max < value) max = value;\n          }\n        }\n      }\n    }\n  }\n\n  else {\n    while (++i < n) { // Find the first comparable value.\n      if ((value = valueof(values[i], i, values)) != null && value >= value) {\n        min = max = value;\n        while (++i < n) { // Compare the remaining values.\n          if ((value = valueof(values[i], i, values)) != null) {\n            if (min > value) min = value;\n            if (max < value) max = value;\n          }\n        }\n      }\n    }\n  }\n\n  return [min, max];\n}\n\nvar array = Array.prototype;\n\nvar slice = array.slice;\nvar map = array.map;\n\nfunction constant(x) {\n  return function() {\n    return x;\n  };\n}\n\nfunction identity(x) {\n  return x;\n}\n\nfunction sequence(start, stop, step) {\n  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;\n\n  var i = -1,\n      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,\n      range = new Array(n);\n\n  while (++i < n) {\n    range[i] = start + i * step;\n  }\n\n  return range;\n}\n\nvar e10 = Math.sqrt(50),\n    e5 = Math.sqrt(10),\n    e2 = Math.sqrt(2);\n\nfunction ticks(start, stop, count) {\n  var reverse,\n      i = -1,\n      n,\n      ticks,\n      step;\n\n  stop = +stop, start = +start, count = +count;\n  if (start === stop && count > 0) return [start];\n  if (reverse = stop < start) n = start, start = stop, stop = n;\n  if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];\n\n  if (step > 0) {\n    start = Math.ceil(start / step);\n    stop = Math.floor(stop / step);\n    ticks = new Array(n = Math.ceil(stop - start + 1));\n    while (++i < n) ticks[i] = (start + i) * step;\n  } else {\n    start = Math.floor(start * step);\n    stop = Math.ceil(stop * step);\n    ticks = new Array(n = Math.ceil(start - stop + 1));\n    while (++i < n) ticks[i] = (start - i) / step;\n  }\n\n  if (reverse) ticks.reverse();\n\n  return ticks;\n}\n\nfunction tickIncrement(start, stop, count) {\n  var step = (stop - start) / Math.max(0, count),\n      power = Math.floor(Math.log(step) / Math.LN10),\n      error = step / Math.pow(10, power);\n  return power >= 0\n      ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power)\n      : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);\n}\n\nfunction tickStep(start, stop, count) {\n  var step0 = Math.abs(stop - start) / Math.max(0, count),\n      step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),\n      error = step0 / step1;\n  if (error >= e10) step1 *= 10;\n  else if (error >= e5) step1 *= 5;\n  else if (error >= e2) step1 *= 2;\n  return stop < start ? -step1 : step1;\n}\n\nfunction thresholdSturges(values) {\n  return Math.ceil(Math.log(values.length) / Math.LN2) + 1;\n}\n\nfunction histogram() {\n  var value = identity,\n      domain = extent,\n      threshold = thresholdSturges;\n\n  function histogram(data) {\n    var i,\n        n = data.length,\n        x,\n        values = new Array(n);\n\n    for (i = 0; i < n; ++i) {\n      values[i] = value(data[i], i, data);\n    }\n\n    var xz = domain(values),\n        x0 = xz[0],\n        x1 = xz[1],\n        tz = threshold(values, x0, x1);\n\n    // Convert number of thresholds into uniform thresholds.\n    if (!Array.isArray(tz)) {\n      tz = tickStep(x0, x1, tz);\n      tz = sequence(Math.ceil(x0 / tz) * tz, x1, tz); // exclusive\n    }\n\n    // Remove any thresholds outside the domain.\n    var m = tz.length;\n    while (tz[0] <= x0) tz.shift(), --m;\n    while (tz[m - 1] > x1) tz.pop(), --m;\n\n    var bins = new Array(m + 1),\n        bin;\n\n    // Initialize bins.\n    for (i = 0; i <= m; ++i) {\n      bin = bins[i] = [];\n      bin.x0 = i > 0 ? tz[i - 1] : x0;\n      bin.x1 = i < m ? tz[i] : x1;\n    }\n\n    // Assign data to bins by value, ignoring any outside the domain.\n    for (i = 0; i < n; ++i) {\n      x = values[i];\n      if (x0 <= x && x <= x1) {\n        bins[bisectRight(tz, x, 0, m)].push(data[i]);\n      }\n    }\n\n    return bins;\n  }\n\n  histogram.value = function(_) {\n    return arguments.length ? (value = typeof _ === \"function\" ? _ : constant(_), histogram) : value;\n  };\n\n  histogram.domain = function(_) {\n    return arguments.length ? (domain = typeof _ === \"function\" ? _ : constant([_[0], _[1]]), histogram) : domain;\n  };\n\n  histogram.thresholds = function(_) {\n    return arguments.length ? (threshold = typeof _ === \"function\" ? _ : Array.isArray(_) ? constant(slice.call(_)) : constant(_), histogram) : threshold;\n  };\n\n  return histogram;\n}\n\nfunction threshold(values, p, valueof) {\n  if (valueof == null) valueof = number;\n  if (!(n = values.length)) return;\n  if ((p = +p) <= 0 || n < 2) return +valueof(values[0], 0, values);\n  if (p >= 1) return +valueof(values[n - 1], n - 1, values);\n  var n,\n      i = (n - 1) * p,\n      i0 = Math.floor(i),\n      value0 = +valueof(values[i0], i0, values),\n      value1 = +valueof(values[i0 + 1], i0 + 1, values);\n  return value0 + (value1 - value0) * (i - i0);\n}\n\nfunction freedmanDiaconis(values, min, max) {\n  values = map.call(values, number).sort(ascending);\n  return Math.ceil((max - min) / (2 * (threshold(values, 0.75) - threshold(values, 0.25)) * Math.pow(values.length, -1 / 3)));\n}\n\nfunction scott(values, min, max) {\n  return Math.ceil((max - min) / (3.5 * deviation(values) * Math.pow(values.length, -1 / 3)));\n}\n\nfunction max(values, valueof) {\n  var n = values.length,\n      i = -1,\n      value,\n      max;\n\n  if (valueof == null) {\n    while (++i < n) { // Find the first comparable value.\n      if ((value = values[i]) != null && value >= value) {\n        max = value;\n        while (++i < n) { // Compare the remaining values.\n          if ((value = values[i]) != null && value > max) {\n            max = value;\n          }\n        }\n      }\n    }\n  }\n\n  else {\n    while (++i < n) { // Find the first comparable value.\n      if ((value = valueof(values[i], i, values)) != null && value >= value) {\n        max = value;\n        while (++i < n) { // Compare the remaining values.\n          if ((value = valueof(values[i], i, values)) != null && value > max) {\n            max = value;\n          }\n        }\n      }\n    }\n  }\n\n  return max;\n}\n\nfunction mean(values, valueof) {\n  var n = values.length,\n      m = n,\n      i = -1,\n      value,\n      sum = 0;\n\n  if (valueof == null) {\n    while (++i < n) {\n      if (!isNaN(value = number(values[i]))) sum += value;\n      else --m;\n    }\n  }\n\n  else {\n    while (++i < n) {\n      if (!isNaN(value = number(valueof(values[i], i, values)))) sum += value;\n      else --m;\n    }\n  }\n\n  if (m) return sum / m;\n}\n\nfunction median(values, valueof) {\n  var n = values.length,\n      i = -1,\n      value,\n      numbers = [];\n\n  if (valueof == null) {\n    while (++i < n) {\n      if (!isNaN(value = number(values[i]))) {\n        numbers.push(value);\n      }\n    }\n  }\n\n  else {\n    while (++i < n) {\n      if (!isNaN(value = number(valueof(values[i], i, values)))) {\n        numbers.push(value);\n      }\n    }\n  }\n\n  return threshold(numbers.sort(ascending), 0.5);\n}\n\nfunction merge(arrays) {\n  var n = arrays.length,\n      m,\n      i = -1,\n      j = 0,\n      merged,\n      array;\n\n  while (++i < n) j += arrays[i].length;\n  merged = new Array(j);\n\n  while (--n >= 0) {\n    array = arrays[n];\n    m = array.length;\n    while (--m >= 0) {\n      merged[--j] = array[m];\n    }\n  }\n\n  return merged;\n}\n\nfunction min(values, valueof) {\n  var n = values.length,\n      i = -1,\n      value,\n      min;\n\n  if (valueof == null) {\n    while (++i < n) { // Find the first comparable value.\n      if ((value = values[i]) != null && value >= value) {\n        min = value;\n        while (++i < n) { // Compare the remaining values.\n          if ((value = values[i]) != null && min > value) {\n            min = value;\n          }\n        }\n      }\n    }\n  }\n\n  else {\n    while (++i < n) { // Find the first comparable value.\n      if ((value = valueof(values[i], i, values)) != null && value >= value) {\n        min = value;\n        while (++i < n) { // Compare the remaining values.\n          if ((value = valueof(values[i], i, values)) != null && min > value) {\n            min = value;\n          }\n        }\n      }\n    }\n  }\n\n  return min;\n}\n\nfunction permute(array, indexes) {\n  var i = indexes.length, permutes = new Array(i);\n  while (i--) permutes[i] = array[indexes[i]];\n  return permutes;\n}\n\nfunction scan(values, compare) {\n  if (!(n = values.length)) return;\n  var n,\n      i = 0,\n      j = 0,\n      xi,\n      xj = values[j];\n\n  if (compare == null) compare = ascending;\n\n  while (++i < n) {\n    if (compare(xi = values[i], xj) < 0 || compare(xj, xj) !== 0) {\n      xj = xi, j = i;\n    }\n  }\n\n  if (compare(xj, xj) === 0) return j;\n}\n\nfunction shuffle(array, i0, i1) {\n  var m = (i1 == null ? array.length : i1) - (i0 = i0 == null ? 0 : +i0),\n      t,\n      i;\n\n  while (m) {\n    i = Math.random() * m-- | 0;\n    t = array[m + i0];\n    array[m + i0] = array[i + i0];\n    array[i + i0] = t;\n  }\n\n  return array;\n}\n\nfunction sum(values, valueof) {\n  var n = values.length,\n      i = -1,\n      value,\n      sum = 0;\n\n  if (valueof == null) {\n    while (++i < n) {\n      if (value = +values[i]) sum += value; // Note: zero and null are equivalent.\n    }\n  }\n\n  else {\n    while (++i < n) {\n      if (value = +valueof(values[i], i, values)) sum += value;\n    }\n  }\n\n  return sum;\n}\n\nfunction transpose(matrix) {\n  if (!(n = matrix.length)) return [];\n  for (var i = -1, m = min(matrix, length), transpose = new Array(m); ++i < m;) {\n    for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n;) {\n      row[j] = matrix[j][i];\n    }\n  }\n  return transpose;\n}\n\nfunction length(d) {\n  return d.length;\n}\n\nfunction zip() {\n  return transpose(arguments);\n}\n\nvar slice$1 = Array.prototype.slice;\n\nfunction identity$1(x) {\n  return x;\n}\n\nvar top = 1,\n    right = 2,\n    bottom = 3,\n    left = 4,\n    epsilon = 1e-6;\n\nfunction translateX(x) {\n  return \"translate(\" + (x + 0.5) + \",0)\";\n}\n\nfunction translateY(y) {\n  return \"translate(0,\" + (y + 0.5) + \")\";\n}\n\nfunction number$1(scale) {\n  return function(d) {\n    return +scale(d);\n  };\n}\n\nfunction center(scale) {\n  var offset = Math.max(0, scale.bandwidth() - 1) / 2; // Adjust for 0.5px offset.\n  if (scale.round()) offset = Math.round(offset);\n  return function(d) {\n    return +scale(d) + offset;\n  };\n}\n\nfunction entering() {\n  return !this.__axis;\n}\n\nfunction axis(orient, scale) {\n  var tickArguments = [],\n      tickValues = null,\n      tickFormat = null,\n      tickSizeInner = 6,\n      tickSizeOuter = 6,\n      tickPadding = 3,\n      k = orient === top || orient === left ? -1 : 1,\n      x = orient === left || orient === right ? \"x\" : \"y\",\n      transform = orient === top || orient === bottom ? translateX : translateY;\n\n  function axis(context) {\n    var values = tickValues == null ? (scale.ticks ? scale.ticks.apply(scale, tickArguments) : scale.domain()) : tickValues,\n        format = tickFormat == null ? (scale.tickFormat ? scale.tickFormat.apply(scale, tickArguments) : identity$1) : tickFormat,\n        spacing = Math.max(tickSizeInner, 0) + tickPadding,\n        range = scale.range(),\n        range0 = +range[0] + 0.5,\n        range1 = +range[range.length - 1] + 0.5,\n        position = (scale.bandwidth ? center : number$1)(scale.copy()),\n        selection = context.selection ? context.selection() : context,\n        path = selection.selectAll(\".domain\").data([null]),\n        tick = selection.selectAll(\".tick\").data(values, scale).order(),\n        tickExit = tick.exit(),\n        tickEnter = tick.enter().append(\"g\").attr(\"class\", \"tick\"),\n        line = tick.select(\"line\"),\n        text = tick.select(\"text\");\n\n    path = path.merge(path.enter().insert(\"path\", \".tick\")\n        .attr(\"class\", \"domain\")\n        .attr(\"stroke\", \"currentColor\"));\n\n    tick = tick.merge(tickEnter);\n\n    line = line.merge(tickEnter.append(\"line\")\n        .attr(\"stroke\", \"currentColor\")\n        .attr(x + \"2\", k * tickSizeInner));\n\n    text = text.merge(tickEnter.append(\"text\")\n        .attr(\"fill\", \"currentColor\")\n        .attr(x, k * spacing)\n        .attr(\"dy\", orient === top ? \"0em\" : orient === bottom ? \"0.71em\" : \"0.32em\"));\n\n    if (context !== selection) {\n      path = path.transition(context);\n      tick = tick.transition(context);\n      line = line.transition(context);\n      text = text.transition(context);\n\n      tickExit = tickExit.transition(context)\n          .attr(\"opacity\", epsilon)\n          .attr(\"transform\", function(d) { return isFinite(d = position(d)) ? transform(d) : this.getAttribute(\"transform\"); });\n\n      tickEnter\n          .attr(\"opacity\", epsilon)\n          .attr(\"transform\", function(d) { var p = this.parentNode.__axis; return transform(p && isFinite(p = p(d)) ? p : position(d)); });\n    }\n\n    tickExit.remove();\n\n    path\n        .attr(\"d\", orient === left || orient == right\n            ? (tickSizeOuter ? \"M\" + k * tickSizeOuter + \",\" + range0 + \"H0.5V\" + range1 + \"H\" + k * tickSizeOuter : \"M0.5,\" + range0 + \"V\" + range1)\n            : (tickSizeOuter ? \"M\" + range0 + \",\" + k * tickSizeOuter + \"V0.5H\" + range1 + \"V\" + k * tickSizeOuter : \"M\" + range0 + \",0.5H\" + range1));\n\n    tick\n        .attr(\"opacity\", 1)\n        .attr(\"transform\", function(d) { return transform(position(d)); });\n\n    line\n        .attr(x + \"2\", k * tickSizeInner);\n\n    text\n        .attr(x, k * spacing)\n        .text(format);\n\n    selection.filter(entering)\n        .attr(\"fill\", \"none\")\n        .attr(\"font-size\", 10)\n        .attr(\"font-family\", \"sans-serif\")\n        .attr(\"text-anchor\", orient === right ? \"start\" : orient === left ? \"end\" : \"middle\");\n\n    selection\n        .each(function() { this.__axis = position; });\n  }\n\n  axis.scale = function(_) {\n    return arguments.length ? (scale = _, axis) : scale;\n  };\n\n  axis.ticks = function() {\n    return tickArguments = slice$1.call(arguments), axis;\n  };\n\n  axis.tickArguments = function(_) {\n    return arguments.length ? (tickArguments = _ == null ? [] : slice$1.call(_), axis) : tickArguments.slice();\n  };\n\n  axis.tickValues = function(_) {\n    return arguments.length ? (tickValues = _ == null ? null : slice$1.call(_), axis) : tickValues && tickValues.slice();\n  };\n\n  axis.tickFormat = function(_) {\n    return arguments.length ? (tickFormat = _, axis) : tickFormat;\n  };\n\n  axis.tickSize = function(_) {\n    return arguments.length ? (tickSizeInner = tickSizeOuter = +_, axis) : tickSizeInner;\n  };\n\n  axis.tickSizeInner = function(_) {\n    return arguments.length ? (tickSizeInner = +_, axis) : tickSizeInner;\n  };\n\n  axis.tickSizeOuter = function(_) {\n    return arguments.length ? (tickSizeOuter = +_, axis) : tickSizeOuter;\n  };\n\n  axis.tickPadding = function(_) {\n    return arguments.length ? (tickPadding = +_, axis) : tickPadding;\n  };\n\n  return axis;\n}\n\nfunction axisTop(scale) {\n  return axis(top, scale);\n}\n\nfunction axisRight(scale) {\n  return axis(right, scale);\n}\n\nfunction axisBottom(scale) {\n  return axis(bottom, scale);\n}\n\nfunction axisLeft(scale) {\n  return axis(left, scale);\n}\n\nvar noop = {value: function() {}};\n\nfunction dispatch() {\n  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {\n    if (!(t = arguments[i] + \"\") || (t in _) || /[\\s.]/.test(t)) throw new Error(\"illegal type: \" + t);\n    _[t] = [];\n  }\n  return new Dispatch(_);\n}\n\nfunction Dispatch(_) {\n  this._ = _;\n}\n\nfunction parseTypenames(typenames, types) {\n  return typenames.trim().split(/^|\\s+/).map(function(t) {\n    var name = \"\", i = t.indexOf(\".\");\n    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);\n    if (t && !types.hasOwnProperty(t)) throw new Error(\"unknown type: \" + t);\n    return {type: t, name: name};\n  });\n}\n\nDispatch.prototype = dispatch.prototype = {\n  constructor: Dispatch,\n  on: function(typename, callback) {\n    var _ = this._,\n        T = parseTypenames(typename + \"\", _),\n        t,\n        i = -1,\n        n = T.length;\n\n    // If no callback was specified, return the callback of the given type and name.\n    if (arguments.length < 2) {\n      while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;\n      return;\n    }\n\n    // If a type was specified, set the callback for the given type and name.\n    // Otherwise, if a null callback was specified, remove callbacks of the given name.\n    if (callback != null && typeof callback !== \"function\") throw new Error(\"invalid callback: \" + callback);\n    while (++i < n) {\n      if (t = (typename = T[i]).type) _[t] = set(_[t], typename.name, callback);\n      else if (callback == null) for (t in _) _[t] = set(_[t], typename.name, null);\n    }\n\n    return this;\n  },\n  copy: function() {\n    var copy = {}, _ = this._;\n    for (var t in _) copy[t] = _[t].slice();\n    return new Dispatch(copy);\n  },\n  call: function(type, that) {\n    if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];\n    if (!this._.hasOwnProperty(type)) throw new Error(\"unknown type: \" + type);\n    for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);\n  },\n  apply: function(type, that, args) {\n    if (!this._.hasOwnProperty(type)) throw new Error(\"unknown type: \" + type);\n    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);\n  }\n};\n\nfunction get(type, name) {\n  for (var i = 0, n = type.length, c; i < n; ++i) {\n    if ((c = type[i]).name === name) {\n      return c.value;\n    }\n  }\n}\n\nfunction set(type, name, callback) {\n  for (var i = 0, n = type.length; i < n; ++i) {\n    if (type[i].name === name) {\n      type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));\n      break;\n    }\n  }\n  if (callback != null) type.push({name: name, value: callback});\n  return type;\n}\n\nvar xhtml = \"http://www.w3.org/1999/xhtml\";\n\nvar namespaces = {\n  svg: \"http://www.w3.org/2000/svg\",\n  xhtml: xhtml,\n  xlink: \"http://www.w3.org/1999/xlink\",\n  xml: \"http://www.w3.org/XML/1998/namespace\",\n  xmlns: \"http://www.w3.org/2000/xmlns/\"\n};\n\nfunction namespace(name) {\n  var prefix = name += \"\", i = prefix.indexOf(\":\");\n  if (i >= 0 && (prefix = name.slice(0, i)) !== \"xmlns\") name = name.slice(i + 1);\n  return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;\n}\n\nfunction creatorInherit(name) {\n  return function() {\n    var document = this.ownerDocument,\n        uri = this.namespaceURI;\n    return uri === xhtml && document.documentElement.namespaceURI === xhtml\n        ? document.createElement(name)\n        : document.createElementNS(uri, name);\n  };\n}\n\nfunction creatorFixed(fullname) {\n  return function() {\n    return this.ownerDocument.createElementNS(fullname.space, fullname.local);\n  };\n}\n\nfunction creator(name) {\n  var fullname = namespace(name);\n  return (fullname.local\n      ? creatorFixed\n      : creatorInherit)(fullname);\n}\n\nfunction none() {}\n\nfunction selector(selector) {\n  return selector == null ? none : function() {\n    return this.querySelector(selector);\n  };\n}\n\nfunction selection_select(select) {\n  if (typeof select !== \"function\") select = selector(select);\n\n  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {\n      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {\n        if (\"__data__\" in node) subnode.__data__ = node.__data__;\n        subgroup[i] = subnode;\n      }\n    }\n  }\n\n  return new Selection(subgroups, this._parents);\n}\n\nfunction empty() {\n  return [];\n}\n\nfunction selectorAll(selector) {\n  return selector == null ? empty : function() {\n    return this.querySelectorAll(selector);\n  };\n}\n\nfunction selection_selectAll(select) {\n  if (typeof select !== \"function\") select = selectorAll(select);\n\n  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        subgroups.push(select.call(node, node.__data__, i, group));\n        parents.push(node);\n      }\n    }\n  }\n\n  return new Selection(subgroups, parents);\n}\n\nfunction matcher(selector) {\n  return function() {\n    return this.matches(selector);\n  };\n}\n\nfunction selection_filter(match) {\n  if (typeof match !== \"function\") match = matcher(match);\n\n  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {\n      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {\n        subgroup.push(node);\n      }\n    }\n  }\n\n  return new Selection(subgroups, this._parents);\n}\n\nfunction sparse(update) {\n  return new Array(update.length);\n}\n\nfunction selection_enter() {\n  return new Selection(this._enter || this._groups.map(sparse), this._parents);\n}\n\nfunction EnterNode(parent, datum) {\n  this.ownerDocument = parent.ownerDocument;\n  this.namespaceURI = parent.namespaceURI;\n  this._next = null;\n  this._parent = parent;\n  this.__data__ = datum;\n}\n\nEnterNode.prototype = {\n  constructor: EnterNode,\n  appendChild: function(child) { return this._parent.insertBefore(child, this._next); },\n  insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },\n  querySelector: function(selector) { return this._parent.querySelector(selector); },\n  querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }\n};\n\nfunction constant$1(x) {\n  return function() {\n    return x;\n  };\n}\n\nvar keyPrefix = \"$\"; // Protect against keys like “__proto__”.\n\nfunction bindIndex(parent, group, enter, update, exit, data) {\n  var i = 0,\n      node,\n      groupLength = group.length,\n      dataLength = data.length;\n\n  // Put any non-null nodes that fit into update.\n  // Put any null nodes into enter.\n  // Put any remaining data into enter.\n  for (; i < dataLength; ++i) {\n    if (node = group[i]) {\n      node.__data__ = data[i];\n      update[i] = node;\n    } else {\n      enter[i] = new EnterNode(parent, data[i]);\n    }\n  }\n\n  // Put any non-null nodes that don’t fit into exit.\n  for (; i < groupLength; ++i) {\n    if (node = group[i]) {\n      exit[i] = node;\n    }\n  }\n}\n\nfunction bindKey(parent, group, enter, update, exit, data, key) {\n  var i,\n      node,\n      nodeByKeyValue = {},\n      groupLength = group.length,\n      dataLength = data.length,\n      keyValues = new Array(groupLength),\n      keyValue;\n\n  // Compute the key for each node.\n  // If multiple nodes have the same key, the duplicates are added to exit.\n  for (i = 0; i < groupLength; ++i) {\n    if (node = group[i]) {\n      keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);\n      if (keyValue in nodeByKeyValue) {\n        exit[i] = node;\n      } else {\n        nodeByKeyValue[keyValue] = node;\n      }\n    }\n  }\n\n  // Compute the key for each datum.\n  // If there a node associated with this key, join and add it to update.\n  // If there is not (or the key is a duplicate), add it to enter.\n  for (i = 0; i < dataLength; ++i) {\n    keyValue = keyPrefix + key.call(parent, data[i], i, data);\n    if (node = nodeByKeyValue[keyValue]) {\n      update[i] = node;\n      node.__data__ = data[i];\n      nodeByKeyValue[keyValue] = null;\n    } else {\n      enter[i] = new EnterNode(parent, data[i]);\n    }\n  }\n\n  // Add any remaining nodes that were not bound to data to exit.\n  for (i = 0; i < groupLength; ++i) {\n    if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {\n      exit[i] = node;\n    }\n  }\n}\n\nfunction selection_data(value, key) {\n  if (!value) {\n    data = new Array(this.size()), j = -1;\n    this.each(function(d) { data[++j] = d; });\n    return data;\n  }\n\n  var bind = key ? bindKey : bindIndex,\n      parents = this._parents,\n      groups = this._groups;\n\n  if (typeof value !== \"function\") value = constant$1(value);\n\n  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {\n    var parent = parents[j],\n        group = groups[j],\n        groupLength = group.length,\n        data = value.call(parent, parent && parent.__data__, j, parents),\n        dataLength = data.length,\n        enterGroup = enter[j] = new Array(dataLength),\n        updateGroup = update[j] = new Array(dataLength),\n        exitGroup = exit[j] = new Array(groupLength);\n\n    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);\n\n    // Now connect the enter nodes to their following update node, such that\n    // appendChild can insert the materialized enter node before this node,\n    // rather than at the end of the parent node.\n    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {\n      if (previous = enterGroup[i0]) {\n        if (i0 >= i1) i1 = i0 + 1;\n        while (!(next = updateGroup[i1]) && ++i1 < dataLength);\n        previous._next = next || null;\n      }\n    }\n  }\n\n  update = new Selection(update, parents);\n  update._enter = enter;\n  update._exit = exit;\n  return update;\n}\n\nfunction selection_exit() {\n  return new Selection(this._exit || this._groups.map(sparse), this._parents);\n}\n\nfunction selection_join(onenter, onupdate, onexit) {\n  var enter = this.enter(), update = this, exit = this.exit();\n  enter = typeof onenter === \"function\" ? onenter(enter) : enter.append(onenter + \"\");\n  if (onupdate != null) update = onupdate(update);\n  if (onexit == null) exit.remove(); else onexit(exit);\n  return enter && update ? enter.merge(update).order() : update;\n}\n\nfunction selection_merge(selection) {\n\n  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {\n    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {\n      if (node = group0[i] || group1[i]) {\n        merge[i] = node;\n      }\n    }\n  }\n\n  for (; j < m0; ++j) {\n    merges[j] = groups0[j];\n  }\n\n  return new Selection(merges, this._parents);\n}\n\nfunction selection_order() {\n\n  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {\n    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {\n      if (node = group[i]) {\n        if (next && node.compareDocumentPosition(next) ^ 4) next.parentNode.insertBefore(node, next);\n        next = node;\n      }\n    }\n  }\n\n  return this;\n}\n\nfunction selection_sort(compare) {\n  if (!compare) compare = ascending$1;\n\n  function compareNode(a, b) {\n    return a && b ? compare(a.__data__, b.__data__) : !a - !b;\n  }\n\n  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        sortgroup[i] = node;\n      }\n    }\n    sortgroup.sort(compareNode);\n  }\n\n  return new Selection(sortgroups, this._parents).order();\n}\n\nfunction ascending$1(a, b) {\n  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;\n}\n\nfunction selection_call() {\n  var callback = arguments[0];\n  arguments[0] = this;\n  callback.apply(null, arguments);\n  return this;\n}\n\nfunction selection_nodes() {\n  var nodes = new Array(this.size()), i = -1;\n  this.each(function() { nodes[++i] = this; });\n  return nodes;\n}\n\nfunction selection_node() {\n\n  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {\n    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {\n      var node = group[i];\n      if (node) return node;\n    }\n  }\n\n  return null;\n}\n\nfunction selection_size() {\n  var size = 0;\n  this.each(function() { ++size; });\n  return size;\n}\n\nfunction selection_empty() {\n  return !this.node();\n}\n\nfunction selection_each(callback) {\n\n  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {\n    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {\n      if (node = group[i]) callback.call(node, node.__data__, i, group);\n    }\n  }\n\n  return this;\n}\n\nfunction attrRemove(name) {\n  return function() {\n    this.removeAttribute(name);\n  };\n}\n\nfunction attrRemoveNS(fullname) {\n  return function() {\n    this.removeAttributeNS(fullname.space, fullname.local);\n  };\n}\n\nfunction attrConstant(name, value) {\n  return function() {\n    this.setAttribute(name, value);\n  };\n}\n\nfunction attrConstantNS(fullname, value) {\n  return function() {\n    this.setAttributeNS(fullname.space, fullname.local, value);\n  };\n}\n\nfunction attrFunction(name, value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    if (v == null) this.removeAttribute(name);\n    else this.setAttribute(name, v);\n  };\n}\n\nfunction attrFunctionNS(fullname, value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    if (v == null) this.removeAttributeNS(fullname.space, fullname.local);\n    else this.setAttributeNS(fullname.space, fullname.local, v);\n  };\n}\n\nfunction selection_attr(name, value) {\n  var fullname = namespace(name);\n\n  if (arguments.length < 2) {\n    var node = this.node();\n    return fullname.local\n        ? node.getAttributeNS(fullname.space, fullname.local)\n        : node.getAttribute(fullname);\n  }\n\n  return this.each((value == null\n      ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === \"function\"\n      ? (fullname.local ? attrFunctionNS : attrFunction)\n      : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));\n}\n\nfunction defaultView(node) {\n  return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node\n      || (node.document && node) // node is a Window\n      || node.defaultView; // node is a Document\n}\n\nfunction styleRemove(name) {\n  return function() {\n    this.style.removeProperty(name);\n  };\n}\n\nfunction styleConstant(name, value, priority) {\n  return function() {\n    this.style.setProperty(name, value, priority);\n  };\n}\n\nfunction styleFunction(name, value, priority) {\n  return function() {\n    var v = value.apply(this, arguments);\n    if (v == null) this.style.removeProperty(name);\n    else this.style.setProperty(name, v, priority);\n  };\n}\n\nfunction selection_style(name, value, priority) {\n  return arguments.length > 1\n      ? this.each((value == null\n            ? styleRemove : typeof value === \"function\"\n            ? styleFunction\n            : styleConstant)(name, value, priority == null ? \"\" : priority))\n      : styleValue(this.node(), name);\n}\n\nfunction styleValue(node, name) {\n  return node.style.getPropertyValue(name)\n      || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);\n}\n\nfunction propertyRemove(name) {\n  return function() {\n    delete this[name];\n  };\n}\n\nfunction propertyConstant(name, value) {\n  return function() {\n    this[name] = value;\n  };\n}\n\nfunction propertyFunction(name, value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    if (v == null) delete this[name];\n    else this[name] = v;\n  };\n}\n\nfunction selection_property(name, value) {\n  return arguments.length > 1\n      ? this.each((value == null\n          ? propertyRemove : typeof value === \"function\"\n          ? propertyFunction\n          : propertyConstant)(name, value))\n      : this.node()[name];\n}\n\nfunction classArray(string) {\n  return string.trim().split(/^|\\s+/);\n}\n\nfunction classList(node) {\n  return node.classList || new ClassList(node);\n}\n\nfunction ClassList(node) {\n  this._node = node;\n  this._names = classArray(node.getAttribute(\"class\") || \"\");\n}\n\nClassList.prototype = {\n  add: function(name) {\n    var i = this._names.indexOf(name);\n    if (i < 0) {\n      this._names.push(name);\n      this._node.setAttribute(\"class\", this._names.join(\" \"));\n    }\n  },\n  remove: function(name) {\n    var i = this._names.indexOf(name);\n    if (i >= 0) {\n      this._names.splice(i, 1);\n      this._node.setAttribute(\"class\", this._names.join(\" \"));\n    }\n  },\n  contains: function(name) {\n    return this._names.indexOf(name) >= 0;\n  }\n};\n\nfunction classedAdd(node, names) {\n  var list = classList(node), i = -1, n = names.length;\n  while (++i < n) list.add(names[i]);\n}\n\nfunction classedRemove(node, names) {\n  var list = classList(node), i = -1, n = names.length;\n  while (++i < n) list.remove(names[i]);\n}\n\nfunction classedTrue(names) {\n  return function() {\n    classedAdd(this, names);\n  };\n}\n\nfunction classedFalse(names) {\n  return function() {\n    classedRemove(this, names);\n  };\n}\n\nfunction classedFunction(names, value) {\n  return function() {\n    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);\n  };\n}\n\nfunction selection_classed(name, value) {\n  var names = classArray(name + \"\");\n\n  if (arguments.length < 2) {\n    var list = classList(this.node()), i = -1, n = names.length;\n    while (++i < n) if (!list.contains(names[i])) return false;\n    return true;\n  }\n\n  return this.each((typeof value === \"function\"\n      ? classedFunction : value\n      ? classedTrue\n      : classedFalse)(names, value));\n}\n\nfunction textRemove() {\n  this.textContent = \"\";\n}\n\nfunction textConstant(value) {\n  return function() {\n    this.textContent = value;\n  };\n}\n\nfunction textFunction(value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    this.textContent = v == null ? \"\" : v;\n  };\n}\n\nfunction selection_text(value) {\n  return arguments.length\n      ? this.each(value == null\n          ? textRemove : (typeof value === \"function\"\n          ? textFunction\n          : textConstant)(value))\n      : this.node().textContent;\n}\n\nfunction htmlRemove() {\n  this.innerHTML = \"\";\n}\n\nfunction htmlConstant(value) {\n  return function() {\n    this.innerHTML = value;\n  };\n}\n\nfunction htmlFunction(value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    this.innerHTML = v == null ? \"\" : v;\n  };\n}\n\nfunction selection_html(value) {\n  return arguments.length\n      ? this.each(value == null\n          ? htmlRemove : (typeof value === \"function\"\n          ? htmlFunction\n          : htmlConstant)(value))\n      : this.node().innerHTML;\n}\n\nfunction raise() {\n  if (this.nextSibling) this.parentNode.appendChild(this);\n}\n\nfunction selection_raise() {\n  return this.each(raise);\n}\n\nfunction lower() {\n  if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);\n}\n\nfunction selection_lower() {\n  return this.each(lower);\n}\n\nfunction selection_append(name) {\n  var create = typeof name === \"function\" ? name : creator(name);\n  return this.select(function() {\n    return this.appendChild(create.apply(this, arguments));\n  });\n}\n\nfunction constantNull() {\n  return null;\n}\n\nfunction selection_insert(name, before) {\n  var create = typeof name === \"function\" ? name : creator(name),\n      select = before == null ? constantNull : typeof before === \"function\" ? before : selector(before);\n  return this.select(function() {\n    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);\n  });\n}\n\nfunction remove() {\n  var parent = this.parentNode;\n  if (parent) parent.removeChild(this);\n}\n\nfunction selection_remove() {\n  return this.each(remove);\n}\n\nfunction selection_cloneShallow() {\n  var clone = this.cloneNode(false), parent = this.parentNode;\n  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;\n}\n\nfunction selection_cloneDeep() {\n  var clone = this.cloneNode(true), parent = this.parentNode;\n  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;\n}\n\nfunction selection_clone(deep) {\n  return this.select(deep ? selection_cloneDeep : selection_cloneShallow);\n}\n\nfunction selection_datum(value) {\n  return arguments.length\n      ? this.property(\"__data__\", value)\n      : this.node().__data__;\n}\n\nvar filterEvents = {};\n\nexports.event = null;\n\nif (typeof document !== \"undefined\") {\n  var element = document.documentElement;\n  if (!(\"onmouseenter\" in element)) {\n    filterEvents = {mouseenter: \"mouseover\", mouseleave: \"mouseout\"};\n  }\n}\n\nfunction filterContextListener(listener, index, group) {\n  listener = contextListener(listener, index, group);\n  return function(event) {\n    var related = event.relatedTarget;\n    if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {\n      listener.call(this, event);\n    }\n  };\n}\n\nfunction contextListener(listener, index, group) {\n  return function(event1) {\n    var event0 = exports.event; // Events can be reentrant (e.g., focus).\n    exports.event = event1;\n    try {\n      listener.call(this, this.__data__, index, group);\n    } finally {\n      exports.event = event0;\n    }\n  };\n}\n\nfunction parseTypenames$1(typenames) {\n  return typenames.trim().split(/^|\\s+/).map(function(t) {\n    var name = \"\", i = t.indexOf(\".\");\n    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);\n    return {type: t, name: name};\n  });\n}\n\nfunction onRemove(typename) {\n  return function() {\n    var on = this.__on;\n    if (!on) return;\n    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {\n      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {\n        this.removeEventListener(o.type, o.listener, o.capture);\n      } else {\n        on[++i] = o;\n      }\n    }\n    if (++i) on.length = i;\n    else delete this.__on;\n  };\n}\n\nfunction onAdd(typename, value, capture) {\n  var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;\n  return function(d, i, group) {\n    var on = this.__on, o, listener = wrap(value, i, group);\n    if (on) for (var j = 0, m = on.length; j < m; ++j) {\n      if ((o = on[j]).type === typename.type && o.name === typename.name) {\n        this.removeEventListener(o.type, o.listener, o.capture);\n        this.addEventListener(o.type, o.listener = listener, o.capture = capture);\n        o.value = value;\n        return;\n      }\n    }\n    this.addEventListener(typename.type, listener, capture);\n    o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};\n    if (!on) this.__on = [o];\n    else on.push(o);\n  };\n}\n\nfunction selection_on(typename, value, capture) {\n  var typenames = parseTypenames$1(typename + \"\"), i, n = typenames.length, t;\n\n  if (arguments.length < 2) {\n    var on = this.node().__on;\n    if (on) for (var j = 0, m = on.length, o; j < m; ++j) {\n      for (i = 0, o = on[j]; i < n; ++i) {\n        if ((t = typenames[i]).type === o.type && t.name === o.name) {\n          return o.value;\n        }\n      }\n    }\n    return;\n  }\n\n  on = value ? onAdd : onRemove;\n  if (capture == null) capture = false;\n  for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));\n  return this;\n}\n\nfunction customEvent(event1, listener, that, args) {\n  var event0 = exports.event;\n  event1.sourceEvent = exports.event;\n  exports.event = event1;\n  try {\n    return listener.apply(that, args);\n  } finally {\n    exports.event = event0;\n  }\n}\n\nfunction dispatchEvent(node, type, params) {\n  var window = defaultView(node),\n      event = window.CustomEvent;\n\n  if (typeof event === \"function\") {\n    event = new event(type, params);\n  } else {\n    event = window.document.createEvent(\"Event\");\n    if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;\n    else event.initEvent(type, false, false);\n  }\n\n  node.dispatchEvent(event);\n}\n\nfunction dispatchConstant(type, params) {\n  return function() {\n    return dispatchEvent(this, type, params);\n  };\n}\n\nfunction dispatchFunction(type, params) {\n  return function() {\n    return dispatchEvent(this, type, params.apply(this, arguments));\n  };\n}\n\nfunction selection_dispatch(type, params) {\n  return this.each((typeof params === \"function\"\n      ? dispatchFunction\n      : dispatchConstant)(type, params));\n}\n\nvar root = [null];\n\nfunction Selection(groups, parents) {\n  this._groups = groups;\n  this._parents = parents;\n}\n\nfunction selection() {\n  return new Selection([[document.documentElement]], root);\n}\n\nSelection.prototype = selection.prototype = {\n  constructor: Selection,\n  select: selection_select,\n  selectAll: selection_selectAll,\n  filter: selection_filter,\n  data: selection_data,\n  enter: selection_enter,\n  exit: selection_exit,\n  join: selection_join,\n  merge: selection_merge,\n  order: selection_order,\n  sort: selection_sort,\n  call: selection_call,\n  nodes: selection_nodes,\n  node: selection_node,\n  size: selection_size,\n  empty: selection_empty,\n  each: selection_each,\n  attr: selection_attr,\n  style: selection_style,\n  property: selection_property,\n  classed: selection_classed,\n  text: selection_text,\n  html: selection_html,\n  raise: selection_raise,\n  lower: selection_lower,\n  append: selection_append,\n  insert: selection_insert,\n  remove: selection_remove,\n  clone: selection_clone,\n  datum: selection_datum,\n  on: selection_on,\n  dispatch: selection_dispatch\n};\n\nfunction select(selector) {\n  return typeof selector === \"string\"\n      ? new Selection([[document.querySelector(selector)]], [document.documentElement])\n      : new Selection([[selector]], root);\n}\n\nfunction create(name) {\n  return select(creator(name).call(document.documentElement));\n}\n\nvar nextId = 0;\n\nfunction local() {\n  return new Local;\n}\n\nfunction Local() {\n  this._ = \"@\" + (++nextId).toString(36);\n}\n\nLocal.prototype = local.prototype = {\n  constructor: Local,\n  get: function(node) {\n    var id = this._;\n    while (!(id in node)) if (!(node = node.parentNode)) return;\n    return node[id];\n  },\n  set: function(node, value) {\n    return node[this._] = value;\n  },\n  remove: function(node) {\n    return this._ in node && delete node[this._];\n  },\n  toString: function() {\n    return this._;\n  }\n};\n\nfunction sourceEvent() {\n  var current = exports.event, source;\n  while (source = current.sourceEvent) current = source;\n  return current;\n}\n\nfunction point(node, event) {\n  var svg = node.ownerSVGElement || node;\n\n  if (svg.createSVGPoint) {\n    var point = svg.createSVGPoint();\n    point.x = event.clientX, point.y = event.clientY;\n    point = point.matrixTransform(node.getScreenCTM().inverse());\n    return [point.x, point.y];\n  }\n\n  var rect = node.getBoundingClientRect();\n  return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];\n}\n\nfunction mouse(node) {\n  var event = sourceEvent();\n  if (event.changedTouches) event = event.changedTouches[0];\n  return point(node, event);\n}\n\nfunction selectAll(selector) {\n  return typeof selector === \"string\"\n      ? new Selection([document.querySelectorAll(selector)], [document.documentElement])\n      : new Selection([selector == null ? [] : selector], root);\n}\n\nfunction touch(node, touches, identifier) {\n  if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;\n\n  for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {\n    if ((touch = touches[i]).identifier === identifier) {\n      return point(node, touch);\n    }\n  }\n\n  return null;\n}\n\nfunction touches(node, touches) {\n  if (touches == null) touches = sourceEvent().touches;\n\n  for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) {\n    points[i] = point(node, touches[i]);\n  }\n\n  return points;\n}\n\nfunction nopropagation() {\n  exports.event.stopImmediatePropagation();\n}\n\nfunction noevent() {\n  exports.event.preventDefault();\n  exports.event.stopImmediatePropagation();\n}\n\nfunction dragDisable(view) {\n  var root = view.document.documentElement,\n      selection = select(view).on(\"dragstart.drag\", noevent, true);\n  if (\"onselectstart\" in root) {\n    selection.on(\"selectstart.drag\", noevent, true);\n  } else {\n    root.__noselect = root.style.MozUserSelect;\n    root.style.MozUserSelect = \"none\";\n  }\n}\n\nfunction yesdrag(view, noclick) {\n  var root = view.document.documentElement,\n      selection = select(view).on(\"dragstart.drag\", null);\n  if (noclick) {\n    selection.on(\"click.drag\", noevent, true);\n    setTimeout(function() { selection.on(\"click.drag\", null); }, 0);\n  }\n  if (\"onselectstart\" in root) {\n    selection.on(\"selectstart.drag\", null);\n  } else {\n    root.style.MozUserSelect = root.__noselect;\n    delete root.__noselect;\n  }\n}\n\nfunction constant$2(x) {\n  return function() {\n    return x;\n  };\n}\n\nfunction DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {\n  this.target = target;\n  this.type = type;\n  this.subject = subject;\n  this.identifier = id;\n  this.active = active;\n  this.x = x;\n  this.y = y;\n  this.dx = dx;\n  this.dy = dy;\n  this._ = dispatch;\n}\n\nDragEvent.prototype.on = function() {\n  var value = this._.on.apply(this._, arguments);\n  return value === this._ ? this : value;\n};\n\n// Ignore right-click, since that should open the context menu.\nfunction defaultFilter() {\n  return !exports.event.ctrlKey && !exports.event.button;\n}\n\nfunction defaultContainer() {\n  return this.parentNode;\n}\n\nfunction defaultSubject(d) {\n  return d == null ? {x: exports.event.x, y: exports.event.y} : d;\n}\n\nfunction defaultTouchable() {\n  return navigator.maxTouchPoints || (\"ontouchstart\" in this);\n}\n\nfunction drag() {\n  var filter = defaultFilter,\n      container = defaultContainer,\n      subject = defaultSubject,\n      touchable = defaultTouchable,\n      gestures = {},\n      listeners = dispatch(\"start\", \"drag\", \"end\"),\n      active = 0,\n      mousedownx,\n      mousedowny,\n      mousemoving,\n      touchending,\n      clickDistance2 = 0;\n\n  function drag(selection) {\n    selection\n        .on(\"mousedown.drag\", mousedowned)\n      .filter(touchable)\n        .on(\"touchstart.drag\", touchstarted)\n        .on(\"touchmove.drag\", touchmoved)\n        .on(\"touchend.drag touchcancel.drag\", touchended)\n        .style(\"touch-action\", \"none\")\n        .style(\"-webkit-tap-highlight-color\", \"rgba(0,0,0,0)\");\n  }\n\n  function mousedowned() {\n    if (touchending || !filter.apply(this, arguments)) return;\n    var gesture = beforestart(\"mouse\", container.apply(this, arguments), mouse, this, arguments);\n    if (!gesture) return;\n    select(exports.event.view).on(\"mousemove.drag\", mousemoved, true).on(\"mouseup.drag\", mouseupped, true);\n    dragDisable(exports.event.view);\n    nopropagation();\n    mousemoving = false;\n    mousedownx = exports.event.clientX;\n    mousedowny = exports.event.clientY;\n    gesture(\"start\");\n  }\n\n  function mousemoved() {\n    noevent();\n    if (!mousemoving) {\n      var dx = exports.event.clientX - mousedownx, dy = exports.event.clientY - mousedowny;\n      mousemoving = dx * dx + dy * dy > clickDistance2;\n    }\n    gestures.mouse(\"drag\");\n  }\n\n  function mouseupped() {\n    select(exports.event.view).on(\"mousemove.drag mouseup.drag\", null);\n    yesdrag(exports.event.view, mousemoving);\n    noevent();\n    gestures.mouse(\"end\");\n  }\n\n  function touchstarted() {\n    if (!filter.apply(this, arguments)) return;\n    var touches = exports.event.changedTouches,\n        c = container.apply(this, arguments),\n        n = touches.length, i, gesture;\n\n    for (i = 0; i < n; ++i) {\n      if (gesture = beforestart(touches[i].identifier, c, touch, this, arguments)) {\n        nopropagation();\n        gesture(\"start\");\n      }\n    }\n  }\n\n  function touchmoved() {\n    var touches = exports.event.changedTouches,\n        n = touches.length, i, gesture;\n\n    for (i = 0; i < n; ++i) {\n      if (gesture = gestures[touches[i].identifier]) {\n        noevent();\n        gesture(\"drag\");\n      }\n    }\n  }\n\n  function touchended() {\n    var touches = exports.event.changedTouches,\n        n = touches.length, i, gesture;\n\n    if (touchending) clearTimeout(touchending);\n    touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!\n    for (i = 0; i < n; ++i) {\n      if (gesture = gestures[touches[i].identifier]) {\n        nopropagation();\n        gesture(\"end\");\n      }\n    }\n  }\n\n  function beforestart(id, container, point, that, args) {\n    var p = point(container, id), s, dx, dy,\n        sublisteners = listeners.copy();\n\n    if (!customEvent(new DragEvent(drag, \"beforestart\", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {\n      if ((exports.event.subject = s = subject.apply(that, args)) == null) return false;\n      dx = s.x - p[0] || 0;\n      dy = s.y - p[1] || 0;\n      return true;\n    })) return;\n\n    return function gesture(type) {\n      var p0 = p, n;\n      switch (type) {\n        case \"start\": gestures[id] = gesture, n = active++; break;\n        case \"end\": delete gestures[id], --active; // nobreak\n        case \"drag\": p = point(container, id), n = active; break;\n      }\n      customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);\n    };\n  }\n\n  drag.filter = function(_) {\n    return arguments.length ? (filter = typeof _ === \"function\" ? _ : constant$2(!!_), drag) : filter;\n  };\n\n  drag.container = function(_) {\n    return arguments.length ? (container = typeof _ === \"function\" ? _ : constant$2(_), drag) : container;\n  };\n\n  drag.subject = function(_) {\n    return arguments.length ? (subject = typeof _ === \"function\" ? _ : constant$2(_), drag) : subject;\n  };\n\n  drag.touchable = function(_) {\n    return arguments.length ? (touchable = typeof _ === \"function\" ? _ : constant$2(!!_), drag) : touchable;\n  };\n\n  drag.on = function() {\n    var value = listeners.on.apply(listeners, arguments);\n    return value === listeners ? drag : value;\n  };\n\n  drag.clickDistance = function(_) {\n    return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);\n  };\n\n  return drag;\n}\n\nfunction define(constructor, factory, prototype) {\n  constructor.prototype = factory.prototype = prototype;\n  prototype.constructor = constructor;\n}\n\nfunction extend(parent, definition) {\n  var prototype = Object.create(parent.prototype);\n  for (var key in definition) prototype[key] = definition[key];\n  return prototype;\n}\n\nfunction Color() {}\n\nvar darker = 0.7;\nvar brighter = 1 / darker;\n\nvar reI = \"\\\\s*([+-]?\\\\d+)\\\\s*\",\n    reN = \"\\\\s*([+-]?\\\\d*\\\\.?\\\\d+(?:[eE][+-]?\\\\d+)?)\\\\s*\",\n    reP = \"\\\\s*([+-]?\\\\d*\\\\.?\\\\d+(?:[eE][+-]?\\\\d+)?)%\\\\s*\",\n    reHex = /^#([0-9a-f]{3,8})$/,\n    reRgbInteger = new RegExp(\"^rgb\\\\(\" + [reI, reI, reI] + \"\\\\)$\"),\n    reRgbPercent = new RegExp(\"^rgb\\\\(\" + [reP, reP, reP] + \"\\\\)$\"),\n    reRgbaInteger = new RegExp(\"^rgba\\\\(\" + [reI, reI, reI, reN] + \"\\\\)$\"),\n    reRgbaPercent = new RegExp(\"^rgba\\\\(\" + [reP, reP, reP, reN] + \"\\\\)$\"),\n    reHslPercent = new RegExp(\"^hsl\\\\(\" + [reN, reP, reP] + \"\\\\)$\"),\n    reHslaPercent = new RegExp(\"^hsla\\\\(\" + [reN, reP, reP, reN] + \"\\\\)$\");\n\nvar named = {\n  aliceblue: 0xf0f8ff,\n  antiquewhite: 0xfaebd7,\n  aqua: 0x00ffff,\n  aquamarine: 0x7fffd4,\n  azure: 0xf0ffff,\n  beige: 0xf5f5dc,\n  bisque: 0xffe4c4,\n  black: 0x000000,\n  blanchedalmond: 0xffebcd,\n  blue: 0x0000ff,\n  blueviolet: 0x8a2be2,\n  brown: 0xa52a2a,\n  burlywood: 0xdeb887,\n  cadetblue: 0x5f9ea0,\n  chartreuse: 0x7fff00,\n  chocolate: 0xd2691e,\n  coral: 0xff7f50,\n  cornflowerblue: 0x6495ed,\n  cornsilk: 0xfff8dc,\n  crimson: 0xdc143c,\n  cyan: 0x00ffff,\n  darkblue: 0x00008b,\n  darkcyan: 0x008b8b,\n  darkgoldenrod: 0xb8860b,\n  darkgray: 0xa9a9a9,\n  darkgreen: 0x006400,\n  darkgrey: 0xa9a9a9,\n  darkkhaki: 0xbdb76b,\n  darkmagenta: 0x8b008b,\n  darkolivegreen: 0x556b2f,\n  darkorange: 0xff8c00,\n  darkorchid: 0x9932cc,\n  darkred: 0x8b0000,\n  darksalmon: 0xe9967a,\n  darkseagreen: 0x8fbc8f,\n  darkslateblue: 0x483d8b,\n  darkslategray: 0x2f4f4f,\n  darkslategrey: 0x2f4f4f,\n  darkturquoise: 0x00ced1,\n  darkviolet: 0x9400d3,\n  deeppink: 0xff1493,\n  deepskyblue: 0x00bfff,\n  dimgray: 0x696969,\n  dimgrey: 0x696969,\n  dodgerblue: 0x1e90ff,\n  firebrick: 0xb22222,\n  floralwhite: 0xfffaf0,\n  forestgreen: 0x228b22,\n  fuchsia: 0xff00ff,\n  gainsboro: 0xdcdcdc,\n  ghostwhite: 0xf8f8ff,\n  gold: 0xffd700,\n  goldenrod: 0xdaa520,\n  gray: 0x808080,\n  green: 0x008000,\n  greenyellow: 0xadff2f,\n  grey: 0x808080,\n  honeydew: 0xf0fff0,\n  hotpink: 0xff69b4,\n  indianred: 0xcd5c5c,\n  indigo: 0x4b0082,\n  ivory: 0xfffff0,\n  khaki: 0xf0e68c,\n  lavender: 0xe6e6fa,\n  lavenderblush: 0xfff0f5,\n  lawngreen: 0x7cfc00,\n  lemonchiffon: 0xfffacd,\n  lightblue: 0xadd8e6,\n  lightcoral: 0xf08080,\n  lightcyan: 0xe0ffff,\n  lightgoldenrodyellow: 0xfafad2,\n  lightgray: 0xd3d3d3,\n  lightgreen: 0x90ee90,\n  lightgrey: 0xd3d3d3,\n  lightpink: 0xffb6c1,\n  lightsalmon: 0xffa07a,\n  lightseagreen: 0x20b2aa,\n  lightskyblue: 0x87cefa,\n  lightslategray: 0x778899,\n  lightslategrey: 0x778899,\n  lightsteelblue: 0xb0c4de,\n  lightyellow: 0xffffe0,\n  lime: 0x00ff00,\n  limegreen: 0x32cd32,\n  linen: 0xfaf0e6,\n  magenta: 0xff00ff,\n  maroon: 0x800000,\n  mediumaquamarine: 0x66cdaa,\n  mediumblue: 0x0000cd,\n  mediumorchid: 0xba55d3,\n  mediumpurple: 0x9370db,\n  mediumseagreen: 0x3cb371,\n  mediumslateblue: 0x7b68ee,\n  mediumspringgreen: 0x00fa9a,\n  mediumturquoise: 0x48d1cc,\n  mediumvioletred: 0xc71585,\n  midnightblue: 0x191970,\n  mintcream: 0xf5fffa,\n  mistyrose: 0xffe4e1,\n  moccasin: 0xffe4b5,\n  navajowhite: 0xffdead,\n  navy: 0x000080,\n  oldlace: 0xfdf5e6,\n  olive: 0x808000,\n  olivedrab: 0x6b8e23,\n  orange: 0xffa500,\n  orangered: 0xff4500,\n  orchid: 0xda70d6,\n  palegoldenrod: 0xeee8aa,\n  palegreen: 0x98fb98,\n  paleturquoise: 0xafeeee,\n  palevioletred: 0xdb7093,\n  papayawhip: 0xffefd5,\n  peachpuff: 0xffdab9,\n  peru: 0xcd853f,\n  pink: 0xffc0cb,\n  plum: 0xdda0dd,\n  powderblue: 0xb0e0e6,\n  purple: 0x800080,\n  rebeccapurple: 0x663399,\n  red: 0xff0000,\n  rosybrown: 0xbc8f8f,\n  royalblue: 0x4169e1,\n  saddlebrown: 0x8b4513,\n  salmon: 0xfa8072,\n  sandybrown: 0xf4a460,\n  seagreen: 0x2e8b57,\n  seashell: 0xfff5ee,\n  sienna: 0xa0522d,\n  silver: 0xc0c0c0,\n  skyblue: 0x87ceeb,\n  slateblue: 0x6a5acd,\n  slategray: 0x708090,\n  slategrey: 0x708090,\n  snow: 0xfffafa,\n  springgreen: 0x00ff7f,\n  steelblue: 0x4682b4,\n  tan: 0xd2b48c,\n  teal: 0x008080,\n  thistle: 0xd8bfd8,\n  tomato: 0xff6347,\n  turquoise: 0x40e0d0,\n  violet: 0xee82ee,\n  wheat: 0xf5deb3,\n  white: 0xffffff,\n  whitesmoke: 0xf5f5f5,\n  yellow: 0xffff00,\n  yellowgreen: 0x9acd32\n};\n\ndefine(Color, color, {\n  copy: function(channels) {\n    return Object.assign(new this.constructor, this, channels);\n  },\n  displayable: function() {\n    return this.rgb().displayable();\n  },\n  hex: color_formatHex, // Deprecated! Use color.formatHex.\n  formatHex: color_formatHex,\n  formatHsl: color_formatHsl,\n  formatRgb: color_formatRgb,\n  toString: color_formatRgb\n});\n\nfunction color_formatHex() {\n  return this.rgb().formatHex();\n}\n\nfunction color_formatHsl() {\n  return hslConvert(this).formatHsl();\n}\n\nfunction color_formatRgb() {\n  return this.rgb().formatRgb();\n}\n\nfunction color(format) {\n  var m, l;\n  format = (format + \"\").trim().toLowerCase();\n  return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000\n      : l === 3 ? new Rgb((m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1) // #f00\n      : l === 8 ? rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000\n      : l === 4 ? rgba((m >> 12 & 0xf) | (m >> 8 & 0xf0), (m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), (((m & 0xf) << 4) | (m & 0xf)) / 0xff) // #f000\n      : null) // invalid hex\n      : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)\n      : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)\n      : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)\n      : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)\n      : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)\n      : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)\n      : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins\n      : format === \"transparent\" ? new Rgb(NaN, NaN, NaN, 0)\n      : null;\n}\n\nfunction rgbn(n) {\n  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);\n}\n\nfunction rgba(r, g, b, a) {\n  if (a <= 0) r = g = b = NaN;\n  return new Rgb(r, g, b, a);\n}\n\nfunction rgbConvert(o) {\n  if (!(o instanceof Color)) o = color(o);\n  if (!o) return new Rgb;\n  o = o.rgb();\n  return new Rgb(o.r, o.g, o.b, o.opacity);\n}\n\nfunction rgb(r, g, b, opacity) {\n  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);\n}\n\nfunction Rgb(r, g, b, opacity) {\n  this.r = +r;\n  this.g = +g;\n  this.b = +b;\n  this.opacity = +opacity;\n}\n\ndefine(Rgb, rgb, extend(Color, {\n  brighter: function(k) {\n    k = k == null ? brighter : Math.pow(brighter, k);\n    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);\n  },\n  darker: function(k) {\n    k = k == null ? darker : Math.pow(darker, k);\n    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);\n  },\n  rgb: function() {\n    return this;\n  },\n  displayable: function() {\n    return (-0.5 <= this.r && this.r < 255.5)\n        && (-0.5 <= this.g && this.g < 255.5)\n        && (-0.5 <= this.b && this.b < 255.5)\n        && (0 <= this.opacity && this.opacity <= 1);\n  },\n  hex: rgb_formatHex, // Deprecated! Use color.formatHex.\n  formatHex: rgb_formatHex,\n  formatRgb: rgb_formatRgb,\n  toString: rgb_formatRgb\n}));\n\nfunction rgb_formatHex() {\n  return \"#\" + hex(this.r) + hex(this.g) + hex(this.b);\n}\n\nfunction rgb_formatRgb() {\n  var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));\n  return (a === 1 ? \"rgb(\" : \"rgba(\")\n      + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + \", \"\n      + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + \", \"\n      + Math.max(0, Math.min(255, Math.round(this.b) || 0))\n      + (a === 1 ? \")\" : \", \" + a + \")\");\n}\n\nfunction hex(value) {\n  value = Math.max(0, Math.min(255, Math.round(value) || 0));\n  return (value < 16 ? \"0\" : \"\") + value.toString(16);\n}\n\nfunction hsla(h, s, l, a) {\n  if (a <= 0) h = s = l = NaN;\n  else if (l <= 0 || l >= 1) h = s = NaN;\n  else if (s <= 0) h = NaN;\n  return new Hsl(h, s, l, a);\n}\n\nfunction hslConvert(o) {\n  if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);\n  if (!(o instanceof Color)) o = color(o);\n  if (!o) return new Hsl;\n  if (o instanceof Hsl) return o;\n  o = o.rgb();\n  var r = o.r / 255,\n      g = o.g / 255,\n      b = o.b / 255,\n      min = Math.min(r, g, b),\n      max = Math.max(r, g, b),\n      h = NaN,\n      s = max - min,\n      l = (max + min) / 2;\n  if (s) {\n    if (r === max) h = (g - b) / s + (g < b) * 6;\n    else if (g === max) h = (b - r) / s + 2;\n    else h = (r - g) / s + 4;\n    s /= l < 0.5 ? max + min : 2 - max - min;\n    h *= 60;\n  } else {\n    s = l > 0 && l < 1 ? 0 : h;\n  }\n  return new Hsl(h, s, l, o.opacity);\n}\n\nfunction hsl(h, s, l, opacity) {\n  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);\n}\n\nfunction Hsl(h, s, l, opacity) {\n  this.h = +h;\n  this.s = +s;\n  this.l = +l;\n  this.opacity = +opacity;\n}\n\ndefine(Hsl, hsl, extend(Color, {\n  brighter: function(k) {\n    k = k == null ? brighter : Math.pow(brighter, k);\n    return new Hsl(this.h, this.s, this.l * k, this.opacity);\n  },\n  darker: function(k) {\n    k = k == null ? darker : Math.pow(darker, k);\n    return new Hsl(this.h, this.s, this.l * k, this.opacity);\n  },\n  rgb: function() {\n    var h = this.h % 360 + (this.h < 0) * 360,\n        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,\n        l = this.l,\n        m2 = l + (l < 0.5 ? l : 1 - l) * s,\n        m1 = 2 * l - m2;\n    return new Rgb(\n      hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),\n      hsl2rgb(h, m1, m2),\n      hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),\n      this.opacity\n    );\n  },\n  displayable: function() {\n    return (0 <= this.s && this.s <= 1 || isNaN(this.s))\n        && (0 <= this.l && this.l <= 1)\n        && (0 <= this.opacity && this.opacity <= 1);\n  },\n  formatHsl: function() {\n    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));\n    return (a === 1 ? \"hsl(\" : \"hsla(\")\n        + (this.h || 0) + \", \"\n        + (this.s || 0) * 100 + \"%, \"\n        + (this.l || 0) * 100 + \"%\"\n        + (a === 1 ? \")\" : \", \" + a + \")\");\n  }\n}));\n\n/* From FvD 13.37, CSS Color Module Level 3 */\nfunction hsl2rgb(h, m1, m2) {\n  return (h < 60 ? m1 + (m2 - m1) * h / 60\n      : h < 180 ? m2\n      : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60\n      : m1) * 255;\n}\n\nvar deg2rad = Math.PI / 180;\nvar rad2deg = 180 / Math.PI;\n\n// https://observablehq.com/@mbostock/lab-and-rgb\nvar K = 18,\n    Xn = 0.96422,\n    Yn = 1,\n    Zn = 0.82521,\n    t0 = 4 / 29,\n    t1 = 6 / 29,\n    t2 = 3 * t1 * t1,\n    t3 = t1 * t1 * t1;\n\nfunction labConvert(o) {\n  if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);\n  if (o instanceof Hcl) return hcl2lab(o);\n  if (!(o instanceof Rgb)) o = rgbConvert(o);\n  var r = rgb2lrgb(o.r),\n      g = rgb2lrgb(o.g),\n      b = rgb2lrgb(o.b),\n      y = xyz2lab((0.2225045 * r + 0.7168786 * g + 0.0606169 * b) / Yn), x, z;\n  if (r === g && g === b) x = z = y; else {\n    x = xyz2lab((0.4360747 * r + 0.3850649 * g + 0.1430804 * b) / Xn);\n    z = xyz2lab((0.0139322 * r + 0.0971045 * g + 0.7141733 * b) / Zn);\n  }\n  return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);\n}\n\nfunction gray(l, opacity) {\n  return new Lab(l, 0, 0, opacity == null ? 1 : opacity);\n}\n\nfunction lab(l, a, b, opacity) {\n  return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);\n}\n\nfunction Lab(l, a, b, opacity) {\n  this.l = +l;\n  this.a = +a;\n  this.b = +b;\n  this.opacity = +opacity;\n}\n\ndefine(Lab, lab, extend(Color, {\n  brighter: function(k) {\n    return new Lab(this.l + K * (k == null ? 1 : k), this.a, this.b, this.opacity);\n  },\n  darker: function(k) {\n    return new Lab(this.l - K * (k == null ? 1 : k), this.a, this.b, this.opacity);\n  },\n  rgb: function() {\n    var y = (this.l + 16) / 116,\n        x = isNaN(this.a) ? y : y + this.a / 500,\n        z = isNaN(this.b) ? y : y - this.b / 200;\n    x = Xn * lab2xyz(x);\n    y = Yn * lab2xyz(y);\n    z = Zn * lab2xyz(z);\n    return new Rgb(\n      lrgb2rgb( 3.1338561 * x - 1.6168667 * y - 0.4906146 * z),\n      lrgb2rgb(-0.9787684 * x + 1.9161415 * y + 0.0334540 * z),\n      lrgb2rgb( 0.0719453 * x - 0.2289914 * y + 1.4052427 * z),\n      this.opacity\n    );\n  }\n}));\n\nfunction xyz2lab(t) {\n  return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;\n}\n\nfunction lab2xyz(t) {\n  return t > t1 ? t * t * t : t2 * (t - t0);\n}\n\nfunction lrgb2rgb(x) {\n  return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);\n}\n\nfunction rgb2lrgb(x) {\n  return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);\n}\n\nfunction hclConvert(o) {\n  if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);\n  if (!(o instanceof Lab)) o = labConvert(o);\n  if (o.a === 0 && o.b === 0) return new Hcl(NaN, 0 < o.l && o.l < 100 ? 0 : NaN, o.l, o.opacity);\n  var h = Math.atan2(o.b, o.a) * rad2deg;\n  return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);\n}\n\nfunction lch(l, c, h, opacity) {\n  return arguments.length === 1 ? hclConvert(l) : new Hcl(h, c, l, opacity == null ? 1 : opacity);\n}\n\nfunction hcl(h, c, l, opacity) {\n  return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);\n}\n\nfunction Hcl(h, c, l, opacity) {\n  this.h = +h;\n  this.c = +c;\n  this.l = +l;\n  this.opacity = +opacity;\n}\n\nfunction hcl2lab(o) {\n  if (isNaN(o.h)) return new Lab(o.l, 0, 0, o.opacity);\n  var h = o.h * deg2rad;\n  return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);\n}\n\ndefine(Hcl, hcl, extend(Color, {\n  brighter: function(k) {\n    return new Hcl(this.h, this.c, this.l + K * (k == null ? 1 : k), this.opacity);\n  },\n  darker: function(k) {\n    return new Hcl(this.h, this.c, this.l - K * (k == null ? 1 : k), this.opacity);\n  },\n  rgb: function() {\n    return hcl2lab(this).rgb();\n  }\n}));\n\nvar A = -0.14861,\n    B = +1.78277,\n    C = -0.29227,\n    D = -0.90649,\n    E = +1.97294,\n    ED = E * D,\n    EB = E * B,\n    BC_DA = B * C - D * A;\n\nfunction cubehelixConvert(o) {\n  if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);\n  if (!(o instanceof Rgb)) o = rgbConvert(o);\n  var r = o.r / 255,\n      g = o.g / 255,\n      b = o.b / 255,\n      l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),\n      bl = b - l,\n      k = (E * (g - l) - C * bl) / D,\n      s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1\n      h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;\n  return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);\n}\n\nfunction cubehelix(h, s, l, opacity) {\n  return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);\n}\n\nfunction Cubehelix(h, s, l, opacity) {\n  this.h = +h;\n  this.s = +s;\n  this.l = +l;\n  this.opacity = +opacity;\n}\n\ndefine(Cubehelix, cubehelix, extend(Color, {\n  brighter: function(k) {\n    k = k == null ? brighter : Math.pow(brighter, k);\n    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);\n  },\n  darker: function(k) {\n    k = k == null ? darker : Math.pow(darker, k);\n    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);\n  },\n  rgb: function() {\n    var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad,\n        l = +this.l,\n        a = isNaN(this.s) ? 0 : this.s * l * (1 - l),\n        cosh = Math.cos(h),\n        sinh = Math.sin(h);\n    return new Rgb(\n      255 * (l + a * (A * cosh + B * sinh)),\n      255 * (l + a * (C * cosh + D * sinh)),\n      255 * (l + a * (E * cosh)),\n      this.opacity\n    );\n  }\n}));\n\nfunction basis(t1, v0, v1, v2, v3) {\n  var t2 = t1 * t1, t3 = t2 * t1;\n  return ((1 - 3 * t1 + 3 * t2 - t3) * v0\n      + (4 - 6 * t2 + 3 * t3) * v1\n      + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2\n      + t3 * v3) / 6;\n}\n\nfunction basis$1(values) {\n  var n = values.length - 1;\n  return function(t) {\n    var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),\n        v1 = values[i],\n        v2 = values[i + 1],\n        v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,\n        v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;\n    return basis((t - i / n) * n, v0, v1, v2, v3);\n  };\n}\n\nfunction basisClosed(values) {\n  var n = values.length;\n  return function(t) {\n    var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),\n        v0 = values[(i + n - 1) % n],\n        v1 = values[i % n],\n        v2 = values[(i + 1) % n],\n        v3 = values[(i + 2) % n];\n    return basis((t - i / n) * n, v0, v1, v2, v3);\n  };\n}\n\nfunction constant$3(x) {\n  return function() {\n    return x;\n  };\n}\n\nfunction linear(a, d) {\n  return function(t) {\n    return a + t * d;\n  };\n}\n\nfunction exponential(a, b, y) {\n  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {\n    return Math.pow(a + t * b, y);\n  };\n}\n\nfunction hue(a, b) {\n  var d = b - a;\n  return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant$3(isNaN(a) ? b : a);\n}\n\nfunction gamma(y) {\n  return (y = +y) === 1 ? nogamma : function(a, b) {\n    return b - a ? exponential(a, b, y) : constant$3(isNaN(a) ? b : a);\n  };\n}\n\nfunction nogamma(a, b) {\n  var d = b - a;\n  return d ? linear(a, d) : constant$3(isNaN(a) ? b : a);\n}\n\nvar interpolateRgb = (function rgbGamma(y) {\n  var color = gamma(y);\n\n  function rgb$1(start, end) {\n    var r = color((start = rgb(start)).r, (end = rgb(end)).r),\n        g = color(start.g, end.g),\n        b = color(start.b, end.b),\n        opacity = nogamma(start.opacity, end.opacity);\n    return function(t) {\n      start.r = r(t);\n      start.g = g(t);\n      start.b = b(t);\n      start.opacity = opacity(t);\n      return start + \"\";\n    };\n  }\n\n  rgb$1.gamma = rgbGamma;\n\n  return rgb$1;\n})(1);\n\nfunction rgbSpline(spline) {\n  return function(colors) {\n    var n = colors.length,\n        r = new Array(n),\n        g = new Array(n),\n        b = new Array(n),\n        i, color;\n    for (i = 0; i < n; ++i) {\n      color = rgb(colors[i]);\n      r[i] = color.r || 0;\n      g[i] = color.g || 0;\n      b[i] = color.b || 0;\n    }\n    r = spline(r);\n    g = spline(g);\n    b = spline(b);\n    color.opacity = 1;\n    return function(t) {\n      color.r = r(t);\n      color.g = g(t);\n      color.b = b(t);\n      return color + \"\";\n    };\n  };\n}\n\nvar rgbBasis = rgbSpline(basis$1);\nvar rgbBasisClosed = rgbSpline(basisClosed);\n\nfunction numberArray(a, b) {\n  if (!b) b = [];\n  var n = a ? Math.min(b.length, a.length) : 0,\n      c = b.slice(),\n      i;\n  return function(t) {\n    for (i = 0; i < n; ++i) c[i] = a[i] * (1 - t) + b[i] * t;\n    return c;\n  };\n}\n\nfunction isNumberArray(x) {\n  return ArrayBuffer.isView(x) && !(x instanceof DataView);\n}\n\nfunction array$1(a, b) {\n  return (isNumberArray(b) ? numberArray : genericArray)(a, b);\n}\n\nfunction genericArray(a, b) {\n  var nb = b ? b.length : 0,\n      na = a ? Math.min(nb, a.length) : 0,\n      x = new Array(na),\n      c = new Array(nb),\n      i;\n\n  for (i = 0; i < na; ++i) x[i] = interpolateValue(a[i], b[i]);\n  for (; i < nb; ++i) c[i] = b[i];\n\n  return function(t) {\n    for (i = 0; i < na; ++i) c[i] = x[i](t);\n    return c;\n  };\n}\n\nfunction date(a, b) {\n  var d = new Date;\n  return a = +a, b = +b, function(t) {\n    return d.setTime(a * (1 - t) + b * t), d;\n  };\n}\n\nfunction interpolateNumber(a, b) {\n  return a = +a, b = +b, function(t) {\n    return a * (1 - t) + b * t;\n  };\n}\n\nfunction object(a, b) {\n  var i = {},\n      c = {},\n      k;\n\n  if (a === null || typeof a !== \"object\") a = {};\n  if (b === null || typeof b !== \"object\") b = {};\n\n  for (k in b) {\n    if (k in a) {\n      i[k] = interpolateValue(a[k], b[k]);\n    } else {\n      c[k] = b[k];\n    }\n  }\n\n  return function(t) {\n    for (k in i) c[k] = i[k](t);\n    return c;\n  };\n}\n\nvar reA = /[-+]?(?:\\d+\\.?\\d*|\\.?\\d+)(?:[eE][-+]?\\d+)?/g,\n    reB = new RegExp(reA.source, \"g\");\n\nfunction zero(b) {\n  return function() {\n    return b;\n  };\n}\n\nfunction one(b) {\n  return function(t) {\n    return b(t) + \"\";\n  };\n}\n\nfunction interpolateString(a, b) {\n  var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b\n      am, // current match in a\n      bm, // current match in b\n      bs, // string preceding current number in b, if any\n      i = -1, // index in s\n      s = [], // string constants and placeholders\n      q = []; // number interpolators\n\n  // Coerce inputs to strings.\n  a = a + \"\", b = b + \"\";\n\n  // Interpolate pairs of numbers in a & b.\n  while ((am = reA.exec(a))\n      && (bm = reB.exec(b))) {\n    if ((bs = bm.index) > bi) { // a string precedes the next number in b\n      bs = b.slice(bi, bs);\n      if (s[i]) s[i] += bs; // coalesce with previous string\n      else s[++i] = bs;\n    }\n    if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match\n      if (s[i]) s[i] += bm; // coalesce with previous string\n      else s[++i] = bm;\n    } else { // interpolate non-matching numbers\n      s[++i] = null;\n      q.push({i: i, x: interpolateNumber(am, bm)});\n    }\n    bi = reB.lastIndex;\n  }\n\n  // Add remains of b.\n  if (bi < b.length) {\n    bs = b.slice(bi);\n    if (s[i]) s[i] += bs; // coalesce with previous string\n    else s[++i] = bs;\n  }\n\n  // Special optimization for only a single match.\n  // Otherwise, interpolate each of the numbers and rejoin the string.\n  return s.length < 2 ? (q[0]\n      ? one(q[0].x)\n      : zero(b))\n      : (b = q.length, function(t) {\n          for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);\n          return s.join(\"\");\n        });\n}\n\nfunction interpolateValue(a, b) {\n  var t = typeof b, c;\n  return b == null || t === \"boolean\" ? constant$3(b)\n      : (t === \"number\" ? interpolateNumber\n      : t === \"string\" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString)\n      : b instanceof color ? interpolateRgb\n      : b instanceof Date ? date\n      : isNumberArray(b) ? numberArray\n      : Array.isArray(b) ? genericArray\n      : typeof b.valueOf !== \"function\" && typeof b.toString !== \"function\" || isNaN(b) ? object\n      : interpolateNumber)(a, b);\n}\n\nfunction discrete(range) {\n  var n = range.length;\n  return function(t) {\n    return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];\n  };\n}\n\nfunction hue$1(a, b) {\n  var i = hue(+a, +b);\n  return function(t) {\n    var x = i(t);\n    return x - 360 * Math.floor(x / 360);\n  };\n}\n\nfunction interpolateRound(a, b) {\n  return a = +a, b = +b, function(t) {\n    return Math.round(a * (1 - t) + b * t);\n  };\n}\n\nvar degrees = 180 / Math.PI;\n\nvar identity$2 = {\n  translateX: 0,\n  translateY: 0,\n  rotate: 0,\n  skewX: 0,\n  scaleX: 1,\n  scaleY: 1\n};\n\nfunction decompose(a, b, c, d, e, f) {\n  var scaleX, scaleY, skewX;\n  if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;\n  if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;\n  if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;\n  if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;\n  return {\n    translateX: e,\n    translateY: f,\n    rotate: Math.atan2(b, a) * degrees,\n    skewX: Math.atan(skewX) * degrees,\n    scaleX: scaleX,\n    scaleY: scaleY\n  };\n}\n\nvar cssNode,\n    cssRoot,\n    cssView,\n    svgNode;\n\nfunction parseCss(value) {\n  if (value === \"none\") return identity$2;\n  if (!cssNode) cssNode = document.createElement(\"DIV\"), cssRoot = document.documentElement, cssView = document.defaultView;\n  cssNode.style.transform = value;\n  value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue(\"transform\");\n  cssRoot.removeChild(cssNode);\n  value = value.slice(7, -1).split(\",\");\n  return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);\n}\n\nfunction parseSvg(value) {\n  if (value == null) return identity$2;\n  if (!svgNode) svgNode = document.createElementNS(\"http://www.w3.org/2000/svg\", \"g\");\n  svgNode.setAttribute(\"transform\", value);\n  if (!(value = svgNode.transform.baseVal.consolidate())) return identity$2;\n  value = value.matrix;\n  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);\n}\n\nfunction interpolateTransform(parse, pxComma, pxParen, degParen) {\n\n  function pop(s) {\n    return s.length ? s.pop() + \" \" : \"\";\n  }\n\n  function translate(xa, ya, xb, yb, s, q) {\n    if (xa !== xb || ya !== yb) {\n      var i = s.push(\"translate(\", null, pxComma, null, pxParen);\n      q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)});\n    } else if (xb || yb) {\n      s.push(\"translate(\" + xb + pxComma + yb + pxParen);\n    }\n  }\n\n  function rotate(a, b, s, q) {\n    if (a !== b) {\n      if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path\n      q.push({i: s.push(pop(s) + \"rotate(\", null, degParen) - 2, x: interpolateNumber(a, b)});\n    } else if (b) {\n      s.push(pop(s) + \"rotate(\" + b + degParen);\n    }\n  }\n\n  function skewX(a, b, s, q) {\n    if (a !== b) {\n      q.push({i: s.push(pop(s) + \"skewX(\", null, degParen) - 2, x: interpolateNumber(a, b)});\n    } else if (b) {\n      s.push(pop(s) + \"skewX(\" + b + degParen);\n    }\n  }\n\n  function scale(xa, ya, xb, yb, s, q) {\n    if (xa !== xb || ya !== yb) {\n      var i = s.push(pop(s) + \"scale(\", null, \",\", null, \")\");\n      q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)});\n    } else if (xb !== 1 || yb !== 1) {\n      s.push(pop(s) + \"scale(\" + xb + \",\" + yb + \")\");\n    }\n  }\n\n  return function(a, b) {\n    var s = [], // string constants and placeholders\n        q = []; // number interpolators\n    a = parse(a), b = parse(b);\n    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);\n    rotate(a.rotate, b.rotate, s, q);\n    skewX(a.skewX, b.skewX, s, q);\n    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);\n    a = b = null; // gc\n    return function(t) {\n      var i = -1, n = q.length, o;\n      while (++i < n) s[(o = q[i]).i] = o.x(t);\n      return s.join(\"\");\n    };\n  };\n}\n\nvar interpolateTransformCss = interpolateTransform(parseCss, \"px, \", \"px)\", \"deg)\");\nvar interpolateTransformSvg = interpolateTransform(parseSvg, \", \", \")\", \")\");\n\nvar rho = Math.SQRT2,\n    rho2 = 2,\n    rho4 = 4,\n    epsilon2 = 1e-12;\n\nfunction cosh(x) {\n  return ((x = Math.exp(x)) + 1 / x) / 2;\n}\n\nfunction sinh(x) {\n  return ((x = Math.exp(x)) - 1 / x) / 2;\n}\n\nfunction tanh(x) {\n  return ((x = Math.exp(2 * x)) - 1) / (x + 1);\n}\n\n// p0 = [ux0, uy0, w0]\n// p1 = [ux1, uy1, w1]\nfunction interpolateZoom(p0, p1) {\n  var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],\n      ux1 = p1[0], uy1 = p1[1], w1 = p1[2],\n      dx = ux1 - ux0,\n      dy = uy1 - uy0,\n      d2 = dx * dx + dy * dy,\n      i,\n      S;\n\n  // Special case for u0 ≅ u1.\n  if (d2 < epsilon2) {\n    S = Math.log(w1 / w0) / rho;\n    i = function(t) {\n      return [\n        ux0 + t * dx,\n        uy0 + t * dy,\n        w0 * Math.exp(rho * t * S)\n      ];\n    };\n  }\n\n  // General case.\n  else {\n    var d1 = Math.sqrt(d2),\n        b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),\n        b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),\n        r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),\n        r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);\n    S = (r1 - r0) / rho;\n    i = function(t) {\n      var s = t * S,\n          coshr0 = cosh(r0),\n          u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));\n      return [\n        ux0 + u * dx,\n        uy0 + u * dy,\n        w0 * coshr0 / cosh(rho * s + r0)\n      ];\n    };\n  }\n\n  i.duration = S * 1000;\n\n  return i;\n}\n\nfunction hsl$1(hue) {\n  return function(start, end) {\n    var h = hue((start = hsl(start)).h, (end = hsl(end)).h),\n        s = nogamma(start.s, end.s),\n        l = nogamma(start.l, end.l),\n        opacity = nogamma(start.opacity, end.opacity);\n    return function(t) {\n      start.h = h(t);\n      start.s = s(t);\n      start.l = l(t);\n      start.opacity = opacity(t);\n      return start + \"\";\n    };\n  }\n}\n\nvar hsl$2 = hsl$1(hue);\nvar hslLong = hsl$1(nogamma);\n\nfunction lab$1(start, end) {\n  var l = nogamma((start = lab(start)).l, (end = lab(end)).l),\n      a = nogamma(start.a, end.a),\n      b = nogamma(start.b, end.b),\n      opacity = nogamma(start.opacity, end.opacity);\n  return function(t) {\n    start.l = l(t);\n    start.a = a(t);\n    start.b = b(t);\n    start.opacity = opacity(t);\n    return start + \"\";\n  };\n}\n\nfunction hcl$1(hue) {\n  return function(start, end) {\n    var h = hue((start = hcl(start)).h, (end = hcl(end)).h),\n        c = nogamma(start.c, end.c),\n        l = nogamma(start.l, end.l),\n        opacity = nogamma(start.opacity, end.opacity);\n    return function(t) {\n      start.h = h(t);\n      start.c = c(t);\n      start.l = l(t);\n      start.opacity = opacity(t);\n      return start + \"\";\n    };\n  }\n}\n\nvar hcl$2 = hcl$1(hue);\nvar hclLong = hcl$1(nogamma);\n\nfunction cubehelix$1(hue) {\n  return (function cubehelixGamma(y) {\n    y = +y;\n\n    function cubehelix$1(start, end) {\n      var h = hue((start = cubehelix(start)).h, (end = cubehelix(end)).h),\n          s = nogamma(start.s, end.s),\n          l = nogamma(start.l, end.l),\n          opacity = nogamma(start.opacity, end.opacity);\n      return function(t) {\n        start.h = h(t);\n        start.s = s(t);\n        start.l = l(Math.pow(t, y));\n        start.opacity = opacity(t);\n        return start + \"\";\n      };\n    }\n\n    cubehelix$1.gamma = cubehelixGamma;\n\n    return cubehelix$1;\n  })(1);\n}\n\nvar cubehelix$2 = cubehelix$1(hue);\nvar cubehelixLong = cubehelix$1(nogamma);\n\nfunction piecewise(interpolate, values) {\n  var i = 0, n = values.length - 1, v = values[0], I = new Array(n < 0 ? 0 : n);\n  while (i < n) I[i] = interpolate(v, v = values[++i]);\n  return function(t) {\n    var i = Math.max(0, Math.min(n - 1, Math.floor(t *= n)));\n    return I[i](t - i);\n  };\n}\n\nfunction quantize(interpolator, n) {\n  var samples = new Array(n);\n  for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));\n  return samples;\n}\n\nvar frame = 0, // is an animation frame pending?\n    timeout = 0, // is a timeout pending?\n    interval = 0, // are any timers active?\n    pokeDelay = 1000, // how frequently we check for clock skew\n    taskHead,\n    taskTail,\n    clockLast = 0,\n    clockNow = 0,\n    clockSkew = 0,\n    clock = typeof performance === \"object\" && performance.now ? performance : Date,\n    setFrame = typeof window === \"object\" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };\n\nfunction now() {\n  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);\n}\n\nfunction clearNow() {\n  clockNow = 0;\n}\n\nfunction Timer() {\n  this._call =\n  this._time =\n  this._next = null;\n}\n\nTimer.prototype = timer.prototype = {\n  constructor: Timer,\n  restart: function(callback, delay, time) {\n    if (typeof callback !== \"function\") throw new TypeError(\"callback is not a function\");\n    time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);\n    if (!this._next && taskTail !== this) {\n      if (taskTail) taskTail._next = this;\n      else taskHead = this;\n      taskTail = this;\n    }\n    this._call = callback;\n    this._time = time;\n    sleep();\n  },\n  stop: function() {\n    if (this._call) {\n      this._call = null;\n      this._time = Infinity;\n      sleep();\n    }\n  }\n};\n\nfunction timer(callback, delay, time) {\n  var t = new Timer;\n  t.restart(callback, delay, time);\n  return t;\n}\n\nfunction timerFlush() {\n  now(); // Get the current time, if not already set.\n  ++frame; // Pretend we’ve set an alarm, if we haven’t already.\n  var t = taskHead, e;\n  while (t) {\n    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);\n    t = t._next;\n  }\n  --frame;\n}\n\nfunction wake() {\n  clockNow = (clockLast = clock.now()) + clockSkew;\n  frame = timeout = 0;\n  try {\n    timerFlush();\n  } finally {\n    frame = 0;\n    nap();\n    clockNow = 0;\n  }\n}\n\nfunction poke() {\n  var now = clock.now(), delay = now - clockLast;\n  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;\n}\n\nfunction nap() {\n  var t0, t1 = taskHead, t2, time = Infinity;\n  while (t1) {\n    if (t1._call) {\n      if (time > t1._time) time = t1._time;\n      t0 = t1, t1 = t1._next;\n    } else {\n      t2 = t1._next, t1._next = null;\n      t1 = t0 ? t0._next = t2 : taskHead = t2;\n    }\n  }\n  taskTail = t0;\n  sleep(time);\n}\n\nfunction sleep(time) {\n  if (frame) return; // Soonest alarm already set, or will be.\n  if (timeout) timeout = clearTimeout(timeout);\n  var delay = time - clockNow; // Strictly less than if we recomputed clockNow.\n  if (delay > 24) {\n    if (time < Infinity) timeout = setTimeout(wake, time - clock.now() - clockSkew);\n    if (interval) interval = clearInterval(interval);\n  } else {\n    if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);\n    frame = 1, setFrame(wake);\n  }\n}\n\nfunction timeout$1(callback, delay, time) {\n  var t = new Timer;\n  delay = delay == null ? 0 : +delay;\n  t.restart(function(elapsed) {\n    t.stop();\n    callback(elapsed + delay);\n  }, delay, time);\n  return t;\n}\n\nfunction interval$1(callback, delay, time) {\n  var t = new Timer, total = delay;\n  if (delay == null) return t.restart(callback, delay, time), t;\n  delay = +delay, time = time == null ? now() : +time;\n  t.restart(function tick(elapsed) {\n    elapsed += total;\n    t.restart(tick, total += delay, time);\n    callback(elapsed);\n  }, delay, time);\n  return t;\n}\n\nvar emptyOn = dispatch(\"start\", \"end\", \"cancel\", \"interrupt\");\nvar emptyTween = [];\n\nvar CREATED = 0;\nvar SCHEDULED = 1;\nvar STARTING = 2;\nvar STARTED = 3;\nvar RUNNING = 4;\nvar ENDING = 5;\nvar ENDED = 6;\n\nfunction schedule(node, name, id, index, group, timing) {\n  var schedules = node.__transition;\n  if (!schedules) node.__transition = {};\n  else if (id in schedules) return;\n  create$1(node, id, {\n    name: name,\n    index: index, // For context during callback.\n    group: group, // For context during callback.\n    on: emptyOn,\n    tween: emptyTween,\n    time: timing.time,\n    delay: timing.delay,\n    duration: timing.duration,\n    ease: timing.ease,\n    timer: null,\n    state: CREATED\n  });\n}\n\nfunction init(node, id) {\n  var schedule = get$1(node, id);\n  if (schedule.state > CREATED) throw new Error(\"too late; already scheduled\");\n  return schedule;\n}\n\nfunction set$1(node, id) {\n  var schedule = get$1(node, id);\n  if (schedule.state > STARTED) throw new Error(\"too late; already running\");\n  return schedule;\n}\n\nfunction get$1(node, id) {\n  var schedule = node.__transition;\n  if (!schedule || !(schedule = schedule[id])) throw new Error(\"transition not found\");\n  return schedule;\n}\n\nfunction create$1(node, id, self) {\n  var schedules = node.__transition,\n      tween;\n\n  // Initialize the self timer when the transition is created.\n  // Note the actual delay is not known until the first callback!\n  schedules[id] = self;\n  self.timer = timer(schedule, 0, self.time);\n\n  function schedule(elapsed) {\n    self.state = SCHEDULED;\n    self.timer.restart(start, self.delay, self.time);\n\n    // If the elapsed delay is less than our first sleep, start immediately.\n    if (self.delay <= elapsed) start(elapsed - self.delay);\n  }\n\n  function start(elapsed) {\n    var i, j, n, o;\n\n    // If the state is not SCHEDULED, then we previously errored on start.\n    if (self.state !== SCHEDULED) return stop();\n\n    for (i in schedules) {\n      o = schedules[i];\n      if (o.name !== self.name) continue;\n\n      // While this element already has a starting transition during this frame,\n      // defer starting an interrupting transition until that transition has a\n      // chance to tick (and possibly end); see d3/d3-transition#54!\n      if (o.state === STARTED) return timeout$1(start);\n\n      // Interrupt the active transition, if any.\n      if (o.state === RUNNING) {\n        o.state = ENDED;\n        o.timer.stop();\n        o.on.call(\"interrupt\", node, node.__data__, o.index, o.group);\n        delete schedules[i];\n      }\n\n      // Cancel any pre-empted transitions.\n      else if (+i < id) {\n        o.state = ENDED;\n        o.timer.stop();\n        o.on.call(\"cancel\", node, node.__data__, o.index, o.group);\n        delete schedules[i];\n      }\n    }\n\n    // Defer the first tick to end of the current frame; see d3/d3#1576.\n    // Note the transition may be canceled after start and before the first tick!\n    // Note this must be scheduled before the start event; see d3/d3-transition#16!\n    // Assuming this is successful, subsequent callbacks go straight to tick.\n    timeout$1(function() {\n      if (self.state === STARTED) {\n        self.state = RUNNING;\n        self.timer.restart(tick, self.delay, self.time);\n        tick(elapsed);\n      }\n    });\n\n    // Dispatch the start event.\n    // Note this must be done before the tween are initialized.\n    self.state = STARTING;\n    self.on.call(\"start\", node, node.__data__, self.index, self.group);\n    if (self.state !== STARTING) return; // interrupted\n    self.state = STARTED;\n\n    // Initialize the tween, deleting null tween.\n    tween = new Array(n = self.tween.length);\n    for (i = 0, j = -1; i < n; ++i) {\n      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {\n        tween[++j] = o;\n      }\n    }\n    tween.length = j + 1;\n  }\n\n  function tick(elapsed) {\n    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),\n        i = -1,\n        n = tween.length;\n\n    while (++i < n) {\n      tween[i].call(node, t);\n    }\n\n    // Dispatch the end event.\n    if (self.state === ENDING) {\n      self.on.call(\"end\", node, node.__data__, self.index, self.group);\n      stop();\n    }\n  }\n\n  function stop() {\n    self.state = ENDED;\n    self.timer.stop();\n    delete schedules[id];\n    for (var i in schedules) return; // eslint-disable-line no-unused-vars\n    delete node.__transition;\n  }\n}\n\nfunction interrupt(node, name) {\n  var schedules = node.__transition,\n      schedule,\n      active,\n      empty = true,\n      i;\n\n  if (!schedules) return;\n\n  name = name == null ? null : name + \"\";\n\n  for (i in schedules) {\n    if ((schedule = schedules[i]).name !== name) { empty = false; continue; }\n    active = schedule.state > STARTING && schedule.state < ENDING;\n    schedule.state = ENDED;\n    schedule.timer.stop();\n    schedule.on.call(active ? \"interrupt\" : \"cancel\", node, node.__data__, schedule.index, schedule.group);\n    delete schedules[i];\n  }\n\n  if (empty) delete node.__transition;\n}\n\nfunction selection_interrupt(name) {\n  return this.each(function() {\n    interrupt(this, name);\n  });\n}\n\nfunction tweenRemove(id, name) {\n  var tween0, tween1;\n  return function() {\n    var schedule = set$1(this, id),\n        tween = schedule.tween;\n\n    // If this node shared tween with the previous node,\n    // just assign the updated shared tween and we’re done!\n    // Otherwise, copy-on-write.\n    if (tween !== tween0) {\n      tween1 = tween0 = tween;\n      for (var i = 0, n = tween1.length; i < n; ++i) {\n        if (tween1[i].name === name) {\n          tween1 = tween1.slice();\n          tween1.splice(i, 1);\n          break;\n        }\n      }\n    }\n\n    schedule.tween = tween1;\n  };\n}\n\nfunction tweenFunction(id, name, value) {\n  var tween0, tween1;\n  if (typeof value !== \"function\") throw new Error;\n  return function() {\n    var schedule = set$1(this, id),\n        tween = schedule.tween;\n\n    // If this node shared tween with the previous node,\n    // just assign the updated shared tween and we’re done!\n    // Otherwise, copy-on-write.\n    if (tween !== tween0) {\n      tween1 = (tween0 = tween).slice();\n      for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {\n        if (tween1[i].name === name) {\n          tween1[i] = t;\n          break;\n        }\n      }\n      if (i === n) tween1.push(t);\n    }\n\n    schedule.tween = tween1;\n  };\n}\n\nfunction transition_tween(name, value) {\n  var id = this._id;\n\n  name += \"\";\n\n  if (arguments.length < 2) {\n    var tween = get$1(this.node(), id).tween;\n    for (var i = 0, n = tween.length, t; i < n; ++i) {\n      if ((t = tween[i]).name === name) {\n        return t.value;\n      }\n    }\n    return null;\n  }\n\n  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));\n}\n\nfunction tweenValue(transition, name, value) {\n  var id = transition._id;\n\n  transition.each(function() {\n    var schedule = set$1(this, id);\n    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);\n  });\n\n  return function(node) {\n    return get$1(node, id).value[name];\n  };\n}\n\nfunction interpolate(a, b) {\n  var c;\n  return (typeof b === \"number\" ? interpolateNumber\n      : b instanceof color ? interpolateRgb\n      : (c = color(b)) ? (b = c, interpolateRgb)\n      : interpolateString)(a, b);\n}\n\nfunction attrRemove$1(name) {\n  return function() {\n    this.removeAttribute(name);\n  };\n}\n\nfunction attrRemoveNS$1(fullname) {\n  return function() {\n    this.removeAttributeNS(fullname.space, fullname.local);\n  };\n}\n\nfunction attrConstant$1(name, interpolate, value1) {\n  var string00,\n      string1 = value1 + \"\",\n      interpolate0;\n  return function() {\n    var string0 = this.getAttribute(name);\n    return string0 === string1 ? null\n        : string0 === string00 ? interpolate0\n        : interpolate0 = interpolate(string00 = string0, value1);\n  };\n}\n\nfunction attrConstantNS$1(fullname, interpolate, value1) {\n  var string00,\n      string1 = value1 + \"\",\n      interpolate0;\n  return function() {\n    var string0 = this.getAttributeNS(fullname.space, fullname.local);\n    return string0 === string1 ? null\n        : string0 === string00 ? interpolate0\n        : interpolate0 = interpolate(string00 = string0, value1);\n  };\n}\n\nfunction attrFunction$1(name, interpolate, value) {\n  var string00,\n      string10,\n      interpolate0;\n  return function() {\n    var string0, value1 = value(this), string1;\n    if (value1 == null) return void this.removeAttribute(name);\n    string0 = this.getAttribute(name);\n    string1 = value1 + \"\";\n    return string0 === string1 ? null\n        : string0 === string00 && string1 === string10 ? interpolate0\n        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));\n  };\n}\n\nfunction attrFunctionNS$1(fullname, interpolate, value) {\n  var string00,\n      string10,\n      interpolate0;\n  return function() {\n    var string0, value1 = value(this), string1;\n    if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);\n    string0 = this.getAttributeNS(fullname.space, fullname.local);\n    string1 = value1 + \"\";\n    return string0 === string1 ? null\n        : string0 === string00 && string1 === string10 ? interpolate0\n        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));\n  };\n}\n\nfunction transition_attr(name, value) {\n  var fullname = namespace(name), i = fullname === \"transform\" ? interpolateTransformSvg : interpolate;\n  return this.attrTween(name, typeof value === \"function\"\n      ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, \"attr.\" + name, value))\n      : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname)\n      : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value));\n}\n\nfunction attrInterpolate(name, i) {\n  return function(t) {\n    this.setAttribute(name, i.call(this, t));\n  };\n}\n\nfunction attrInterpolateNS(fullname, i) {\n  return function(t) {\n    this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));\n  };\n}\n\nfunction attrTweenNS(fullname, value) {\n  var t0, i0;\n  function tween() {\n    var i = value.apply(this, arguments);\n    if (i !== i0) t0 = (i0 = i) && attrInterpolateNS(fullname, i);\n    return t0;\n  }\n  tween._value = value;\n  return tween;\n}\n\nfunction attrTween(name, value) {\n  var t0, i0;\n  function tween() {\n    var i = value.apply(this, arguments);\n    if (i !== i0) t0 = (i0 = i) && attrInterpolate(name, i);\n    return t0;\n  }\n  tween._value = value;\n  return tween;\n}\n\nfunction transition_attrTween(name, value) {\n  var key = \"attr.\" + name;\n  if (arguments.length < 2) return (key = this.tween(key)) && key._value;\n  if (value == null) return this.tween(key, null);\n  if (typeof value !== \"function\") throw new Error;\n  var fullname = namespace(name);\n  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));\n}\n\nfunction delayFunction(id, value) {\n  return function() {\n    init(this, id).delay = +value.apply(this, arguments);\n  };\n}\n\nfunction delayConstant(id, value) {\n  return value = +value, function() {\n    init(this, id).delay = value;\n  };\n}\n\nfunction transition_delay(value) {\n  var id = this._id;\n\n  return arguments.length\n      ? this.each((typeof value === \"function\"\n          ? delayFunction\n          : delayConstant)(id, value))\n      : get$1(this.node(), id).delay;\n}\n\nfunction durationFunction(id, value) {\n  return function() {\n    set$1(this, id).duration = +value.apply(this, arguments);\n  };\n}\n\nfunction durationConstant(id, value) {\n  return value = +value, function() {\n    set$1(this, id).duration = value;\n  };\n}\n\nfunction transition_duration(value) {\n  var id = this._id;\n\n  return arguments.length\n      ? this.each((typeof value === \"function\"\n          ? durationFunction\n          : durationConstant)(id, value))\n      : get$1(this.node(), id).duration;\n}\n\nfunction easeConstant(id, value) {\n  if (typeof value !== \"function\") throw new Error;\n  return function() {\n    set$1(this, id).ease = value;\n  };\n}\n\nfunction transition_ease(value) {\n  var id = this._id;\n\n  return arguments.length\n      ? this.each(easeConstant(id, value))\n      : get$1(this.node(), id).ease;\n}\n\nfunction transition_filter(match) {\n  if (typeof match !== \"function\") match = matcher(match);\n\n  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {\n      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {\n        subgroup.push(node);\n      }\n    }\n  }\n\n  return new Transition(subgroups, this._parents, this._name, this._id);\n}\n\nfunction transition_merge(transition) {\n  if (transition._id !== this._id) throw new Error;\n\n  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {\n    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {\n      if (node = group0[i] || group1[i]) {\n        merge[i] = node;\n      }\n    }\n  }\n\n  for (; j < m0; ++j) {\n    merges[j] = groups0[j];\n  }\n\n  return new Transition(merges, this._parents, this._name, this._id);\n}\n\nfunction start(name) {\n  return (name + \"\").trim().split(/^|\\s+/).every(function(t) {\n    var i = t.indexOf(\".\");\n    if (i >= 0) t = t.slice(0, i);\n    return !t || t === \"start\";\n  });\n}\n\nfunction onFunction(id, name, listener) {\n  var on0, on1, sit = start(name) ? init : set$1;\n  return function() {\n    var schedule = sit(this, id),\n        on = schedule.on;\n\n    // If this node shared a dispatch with the previous node,\n    // just assign the updated shared dispatch and we’re done!\n    // Otherwise, copy-on-write.\n    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);\n\n    schedule.on = on1;\n  };\n}\n\nfunction transition_on(name, listener) {\n  var id = this._id;\n\n  return arguments.length < 2\n      ? get$1(this.node(), id).on.on(name)\n      : this.each(onFunction(id, name, listener));\n}\n\nfunction removeFunction(id) {\n  return function() {\n    var parent = this.parentNode;\n    for (var i in this.__transition) if (+i !== id) return;\n    if (parent) parent.removeChild(this);\n  };\n}\n\nfunction transition_remove() {\n  return this.on(\"end.remove\", removeFunction(this._id));\n}\n\nfunction transition_select(select) {\n  var name = this._name,\n      id = this._id;\n\n  if (typeof select !== \"function\") select = selector(select);\n\n  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {\n      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {\n        if (\"__data__\" in node) subnode.__data__ = node.__data__;\n        subgroup[i] = subnode;\n        schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));\n      }\n    }\n  }\n\n  return new Transition(subgroups, this._parents, name, id);\n}\n\nfunction transition_selectAll(select) {\n  var name = this._name,\n      id = this._id;\n\n  if (typeof select !== \"function\") select = selectorAll(select);\n\n  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        for (var children = select.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {\n          if (child = children[k]) {\n            schedule(child, name, id, k, children, inherit);\n          }\n        }\n        subgroups.push(children);\n        parents.push(node);\n      }\n    }\n  }\n\n  return new Transition(subgroups, parents, name, id);\n}\n\nvar Selection$1 = selection.prototype.constructor;\n\nfunction transition_selection() {\n  return new Selection$1(this._groups, this._parents);\n}\n\nfunction styleNull(name, interpolate) {\n  var string00,\n      string10,\n      interpolate0;\n  return function() {\n    var string0 = styleValue(this, name),\n        string1 = (this.style.removeProperty(name), styleValue(this, name));\n    return string0 === string1 ? null\n        : string0 === string00 && string1 === string10 ? interpolate0\n        : interpolate0 = interpolate(string00 = string0, string10 = string1);\n  };\n}\n\nfunction styleRemove$1(name) {\n  return function() {\n    this.style.removeProperty(name);\n  };\n}\n\nfunction styleConstant$1(name, interpolate, value1) {\n  var string00,\n      string1 = value1 + \"\",\n      interpolate0;\n  return function() {\n    var string0 = styleValue(this, name);\n    return string0 === string1 ? null\n        : string0 === string00 ? interpolate0\n        : interpolate0 = interpolate(string00 = string0, value1);\n  };\n}\n\nfunction styleFunction$1(name, interpolate, value) {\n  var string00,\n      string10,\n      interpolate0;\n  return function() {\n    var string0 = styleValue(this, name),\n        value1 = value(this),\n        string1 = value1 + \"\";\n    if (value1 == null) string1 = value1 = (this.style.removeProperty(name), styleValue(this, name));\n    return string0 === string1 ? null\n        : string0 === string00 && string1 === string10 ? interpolate0\n        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));\n  };\n}\n\nfunction styleMaybeRemove(id, name) {\n  var on0, on1, listener0, key = \"style.\" + name, event = \"end.\" + key, remove;\n  return function() {\n    var schedule = set$1(this, id),\n        on = schedule.on,\n        listener = schedule.value[key] == null ? remove || (remove = styleRemove$1(name)) : undefined;\n\n    // If this node shared a dispatch with the previous node,\n    // just assign the updated shared dispatch and we’re done!\n    // Otherwise, copy-on-write.\n    if (on !== on0 || listener0 !== listener) (on1 = (on0 = on).copy()).on(event, listener0 = listener);\n\n    schedule.on = on1;\n  };\n}\n\nfunction transition_style(name, value, priority) {\n  var i = (name += \"\") === \"transform\" ? interpolateTransformCss : interpolate;\n  return value == null ? this\n      .styleTween(name, styleNull(name, i))\n      .on(\"end.style.\" + name, styleRemove$1(name))\n    : typeof value === \"function\" ? this\n      .styleTween(name, styleFunction$1(name, i, tweenValue(this, \"style.\" + name, value)))\n      .each(styleMaybeRemove(this._id, name))\n    : this\n      .styleTween(name, styleConstant$1(name, i, value), priority)\n      .on(\"end.style.\" + name, null);\n}\n\nfunction styleInterpolate(name, i, priority) {\n  return function(t) {\n    this.style.setProperty(name, i.call(this, t), priority);\n  };\n}\n\nfunction styleTween(name, value, priority) {\n  var t, i0;\n  function tween() {\n    var i = value.apply(this, arguments);\n    if (i !== i0) t = (i0 = i) && styleInterpolate(name, i, priority);\n    return t;\n  }\n  tween._value = value;\n  return tween;\n}\n\nfunction transition_styleTween(name, value, priority) {\n  var key = \"style.\" + (name += \"\");\n  if (arguments.length < 2) return (key = this.tween(key)) && key._value;\n  if (value == null) return this.tween(key, null);\n  if (typeof value !== \"function\") throw new Error;\n  return this.tween(key, styleTween(name, value, priority == null ? \"\" : priority));\n}\n\nfunction textConstant$1(value) {\n  return function() {\n    this.textContent = value;\n  };\n}\n\nfunction textFunction$1(value) {\n  return function() {\n    var value1 = value(this);\n    this.textContent = value1 == null ? \"\" : value1;\n  };\n}\n\nfunction transition_text(value) {\n  return this.tween(\"text\", typeof value === \"function\"\n      ? textFunction$1(tweenValue(this, \"text\", value))\n      : textConstant$1(value == null ? \"\" : value + \"\"));\n}\n\nfunction textInterpolate(i) {\n  return function(t) {\n    this.textContent = i.call(this, t);\n  };\n}\n\nfunction textTween(value) {\n  var t0, i0;\n  function tween() {\n    var i = value.apply(this, arguments);\n    if (i !== i0) t0 = (i0 = i) && textInterpolate(i);\n    return t0;\n  }\n  tween._value = value;\n  return tween;\n}\n\nfunction transition_textTween(value) {\n  var key = \"text\";\n  if (arguments.length < 1) return (key = this.tween(key)) && key._value;\n  if (value == null) return this.tween(key, null);\n  if (typeof value !== \"function\") throw new Error;\n  return this.tween(key, textTween(value));\n}\n\nfunction transition_transition() {\n  var name = this._name,\n      id0 = this._id,\n      id1 = newId();\n\n  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        var inherit = get$1(node, id0);\n        schedule(node, name, id1, i, group, {\n          time: inherit.time + inherit.delay + inherit.duration,\n          delay: 0,\n          duration: inherit.duration,\n          ease: inherit.ease\n        });\n      }\n    }\n  }\n\n  return new Transition(groups, this._parents, name, id1);\n}\n\nfunction transition_end() {\n  var on0, on1, that = this, id = that._id, size = that.size();\n  return new Promise(function(resolve, reject) {\n    var cancel = {value: reject},\n        end = {value: function() { if (--size === 0) resolve(); }};\n\n    that.each(function() {\n      var schedule = set$1(this, id),\n          on = schedule.on;\n\n      // If this node shared a dispatch with the previous node,\n      // just assign the updated shared dispatch and we’re done!\n      // Otherwise, copy-on-write.\n      if (on !== on0) {\n        on1 = (on0 = on).copy();\n        on1._.cancel.push(cancel);\n        on1._.interrupt.push(cancel);\n        on1._.end.push(end);\n      }\n\n      schedule.on = on1;\n    });\n  });\n}\n\nvar id = 0;\n\nfunction Transition(groups, parents, name, id) {\n  this._groups = groups;\n  this._parents = parents;\n  this._name = name;\n  this._id = id;\n}\n\nfunction transition(name) {\n  return selection().transition(name);\n}\n\nfunction newId() {\n  return ++id;\n}\n\nvar selection_prototype = selection.prototype;\n\nTransition.prototype = transition.prototype = {\n  constructor: Transition,\n  select: transition_select,\n  selectAll: transition_selectAll,\n  filter: transition_filter,\n  merge: transition_merge,\n  selection: transition_selection,\n  transition: transition_transition,\n  call: selection_prototype.call,\n  nodes: selection_prototype.nodes,\n  node: selection_prototype.node,\n  size: selection_prototype.size,\n  empty: selection_prototype.empty,\n  each: selection_prototype.each,\n  on: transition_on,\n  attr: transition_attr,\n  attrTween: transition_attrTween,\n  style: transition_style,\n  styleTween: transition_styleTween,\n  text: transition_text,\n  textTween: transition_textTween,\n  remove: transition_remove,\n  tween: transition_tween,\n  delay: transition_delay,\n  duration: transition_duration,\n  ease: transition_ease,\n  end: transition_end\n};\n\nfunction linear$1(t) {\n  return +t;\n}\n\nfunction quadIn(t) {\n  return t * t;\n}\n\nfunction quadOut(t) {\n  return t * (2 - t);\n}\n\nfunction quadInOut(t) {\n  return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2;\n}\n\nfunction cubicIn(t) {\n  return t * t * t;\n}\n\nfunction cubicOut(t) {\n  return --t * t * t + 1;\n}\n\nfunction cubicInOut(t) {\n  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;\n}\n\nvar exponent = 3;\n\nvar polyIn = (function custom(e) {\n  e = +e;\n\n  function polyIn(t) {\n    return Math.pow(t, e);\n  }\n\n  polyIn.exponent = custom;\n\n  return polyIn;\n})(exponent);\n\nvar polyOut = (function custom(e) {\n  e = +e;\n\n  function polyOut(t) {\n    return 1 - Math.pow(1 - t, e);\n  }\n\n  polyOut.exponent = custom;\n\n  return polyOut;\n})(exponent);\n\nvar polyInOut = (function custom(e) {\n  e = +e;\n\n  function polyInOut(t) {\n    return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2;\n  }\n\n  polyInOut.exponent = custom;\n\n  return polyInOut;\n})(exponent);\n\nvar pi = Math.PI,\n    halfPi = pi / 2;\n\nfunction sinIn(t) {\n  return 1 - Math.cos(t * halfPi);\n}\n\nfunction sinOut(t) {\n  return Math.sin(t * halfPi);\n}\n\nfunction sinInOut(t) {\n  return (1 - Math.cos(pi * t)) / 2;\n}\n\nfunction expIn(t) {\n  return Math.pow(2, 10 * t - 10);\n}\n\nfunction expOut(t) {\n  return 1 - Math.pow(2, -10 * t);\n}\n\nfunction expInOut(t) {\n  return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2;\n}\n\nfunction circleIn(t) {\n  return 1 - Math.sqrt(1 - t * t);\n}\n\nfunction circleOut(t) {\n  return Math.sqrt(1 - --t * t);\n}\n\nfunction circleInOut(t) {\n  return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;\n}\n\nvar b1 = 4 / 11,\n    b2 = 6 / 11,\n    b3 = 8 / 11,\n    b4 = 3 / 4,\n    b5 = 9 / 11,\n    b6 = 10 / 11,\n    b7 = 15 / 16,\n    b8 = 21 / 22,\n    b9 = 63 / 64,\n    b0 = 1 / b1 / b1;\n\nfunction bounceIn(t) {\n  return 1 - bounceOut(1 - t);\n}\n\nfunction bounceOut(t) {\n  return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9;\n}\n\nfunction bounceInOut(t) {\n  return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2;\n}\n\nvar overshoot = 1.70158;\n\nvar backIn = (function custom(s) {\n  s = +s;\n\n  function backIn(t) {\n    return t * t * ((s + 1) * t - s);\n  }\n\n  backIn.overshoot = custom;\n\n  return backIn;\n})(overshoot);\n\nvar backOut = (function custom(s) {\n  s = +s;\n\n  function backOut(t) {\n    return --t * t * ((s + 1) * t + s) + 1;\n  }\n\n  backOut.overshoot = custom;\n\n  return backOut;\n})(overshoot);\n\nvar backInOut = (function custom(s) {\n  s = +s;\n\n  function backInOut(t) {\n    return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;\n  }\n\n  backInOut.overshoot = custom;\n\n  return backInOut;\n})(overshoot);\n\nvar tau = 2 * Math.PI,\n    amplitude = 1,\n    period = 0.3;\n\nvar elasticIn = (function custom(a, p) {\n  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);\n\n  function elasticIn(t) {\n    return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p);\n  }\n\n  elasticIn.amplitude = function(a) { return custom(a, p * tau); };\n  elasticIn.period = function(p) { return custom(a, p); };\n\n  return elasticIn;\n})(amplitude, period);\n\nvar elasticOut = (function custom(a, p) {\n  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);\n\n  function elasticOut(t) {\n    return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p);\n  }\n\n  elasticOut.amplitude = function(a) { return custom(a, p * tau); };\n  elasticOut.period = function(p) { return custom(a, p); };\n\n  return elasticOut;\n})(amplitude, period);\n\nvar elasticInOut = (function custom(a, p) {\n  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);\n\n  function elasticInOut(t) {\n    return ((t = t * 2 - 1) < 0\n        ? a * Math.pow(2, 10 * t) * Math.sin((s - t) / p)\n        : 2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2;\n  }\n\n  elasticInOut.amplitude = function(a) { return custom(a, p * tau); };\n  elasticInOut.period = function(p) { return custom(a, p); };\n\n  return elasticInOut;\n})(amplitude, period);\n\nvar defaultTiming = {\n  time: null, // Set on use.\n  delay: 0,\n  duration: 250,\n  ease: cubicInOut\n};\n\nfunction inherit(node, id) {\n  var timing;\n  while (!(timing = node.__transition) || !(timing = timing[id])) {\n    if (!(node = node.parentNode)) {\n      return defaultTiming.time = now(), defaultTiming;\n    }\n  }\n  return timing;\n}\n\nfunction selection_transition(name) {\n  var id,\n      timing;\n\n  if (name instanceof Transition) {\n    id = name._id, name = name._name;\n  } else {\n    id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + \"\";\n  }\n\n  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        schedule(node, name, id, i, group, timing || inherit(node, id));\n      }\n    }\n  }\n\n  return new Transition(groups, this._parents, name, id);\n}\n\nselection.prototype.interrupt = selection_interrupt;\nselection.prototype.transition = selection_transition;\n\nvar root$1 = [null];\n\nfunction active(node, name) {\n  var schedules = node.__transition,\n      schedule,\n      i;\n\n  if (schedules) {\n    name = name == null ? null : name + \"\";\n    for (i in schedules) {\n      if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) {\n        return new Transition([[node]], root$1, name, +i);\n      }\n    }\n  }\n\n  return null;\n}\n\nfunction constant$4(x) {\n  return function() {\n    return x;\n  };\n}\n\nfunction BrushEvent(target, type, selection) {\n  this.target = target;\n  this.type = type;\n  this.selection = selection;\n}\n\nfunction nopropagation$1() {\n  exports.event.stopImmediatePropagation();\n}\n\nfunction noevent$1() {\n  exports.event.preventDefault();\n  exports.event.stopImmediatePropagation();\n}\n\nvar MODE_DRAG = {name: \"drag\"},\n    MODE_SPACE = {name: \"space\"},\n    MODE_HANDLE = {name: \"handle\"},\n    MODE_CENTER = {name: \"center\"};\n\nfunction number1(e) {\n  return [+e[0], +e[1]];\n}\n\nfunction number2(e) {\n  return [number1(e[0]), number1(e[1])];\n}\n\nfunction toucher(identifier) {\n  return function(target) {\n    return touch(target, exports.event.touches, identifier);\n  };\n}\n\nvar X = {\n  name: \"x\",\n  handles: [\"w\", \"e\"].map(type),\n  input: function(x, e) { return x == null ? null : [[+x[0], e[0][1]], [+x[1], e[1][1]]]; },\n  output: function(xy) { return xy && [xy[0][0], xy[1][0]]; }\n};\n\nvar Y = {\n  name: \"y\",\n  handles: [\"n\", \"s\"].map(type),\n  input: function(y, e) { return y == null ? null : [[e[0][0], +y[0]], [e[1][0], +y[1]]]; },\n  output: function(xy) { return xy && [xy[0][1], xy[1][1]]; }\n};\n\nvar XY = {\n  name: \"xy\",\n  handles: [\"n\", \"w\", \"e\", \"s\", \"nw\", \"ne\", \"sw\", \"se\"].map(type),\n  input: function(xy) { return xy == null ? null : number2(xy); },\n  output: function(xy) { return xy; }\n};\n\nvar cursors = {\n  overlay: \"crosshair\",\n  selection: \"move\",\n  n: \"ns-resize\",\n  e: \"ew-resize\",\n  s: \"ns-resize\",\n  w: \"ew-resize\",\n  nw: \"nwse-resize\",\n  ne: \"nesw-resize\",\n  se: \"nwse-resize\",\n  sw: \"nesw-resize\"\n};\n\nvar flipX = {\n  e: \"w\",\n  w: \"e\",\n  nw: \"ne\",\n  ne: \"nw\",\n  se: \"sw\",\n  sw: \"se\"\n};\n\nvar flipY = {\n  n: \"s\",\n  s: \"n\",\n  nw: \"sw\",\n  ne: \"se\",\n  se: \"ne\",\n  sw: \"nw\"\n};\n\nvar signsX = {\n  overlay: +1,\n  selection: +1,\n  n: null,\n  e: +1,\n  s: null,\n  w: -1,\n  nw: -1,\n  ne: +1,\n  se: +1,\n  sw: -1\n};\n\nvar signsY = {\n  overlay: +1,\n  selection: +1,\n  n: -1,\n  e: null,\n  s: +1,\n  w: null,\n  nw: -1,\n  ne: -1,\n  se: +1,\n  sw: +1\n};\n\nfunction type(t) {\n  return {type: t};\n}\n\n// Ignore right-click, since that should open the context menu.\nfunction defaultFilter$1() {\n  return !exports.event.ctrlKey && !exports.event.button;\n}\n\nfunction defaultExtent() {\n  var svg = this.ownerSVGElement || this;\n  if (svg.hasAttribute(\"viewBox\")) {\n    svg = svg.viewBox.baseVal;\n    return [[svg.x, svg.y], [svg.x + svg.width, svg.y + svg.height]];\n  }\n  return [[0, 0], [svg.width.baseVal.value, svg.height.baseVal.value]];\n}\n\nfunction defaultTouchable$1() {\n  return navigator.maxTouchPoints || (\"ontouchstart\" in this);\n}\n\n// Like d3.local, but with the name “__brush” rather than auto-generated.\nfunction local$1(node) {\n  while (!node.__brush) if (!(node = node.parentNode)) return;\n  return node.__brush;\n}\n\nfunction empty$1(extent) {\n  return extent[0][0] === extent[1][0]\n      || extent[0][1] === extent[1][1];\n}\n\nfunction brushSelection(node) {\n  var state = node.__brush;\n  return state ? state.dim.output(state.selection) : null;\n}\n\nfunction brushX() {\n  return brush$1(X);\n}\n\nfunction brushY() {\n  return brush$1(Y);\n}\n\nfunction brush() {\n  return brush$1(XY);\n}\n\nfunction brush$1(dim) {\n  var extent = defaultExtent,\n      filter = defaultFilter$1,\n      touchable = defaultTouchable$1,\n      keys = true,\n      listeners = dispatch(\"start\", \"brush\", \"end\"),\n      handleSize = 6,\n      touchending;\n\n  function brush(group) {\n    var overlay = group\n        .property(\"__brush\", initialize)\n      .selectAll(\".overlay\")\n      .data([type(\"overlay\")]);\n\n    overlay.enter().append(\"rect\")\n        .attr(\"class\", \"overlay\")\n        .attr(\"pointer-events\", \"all\")\n        .attr(\"cursor\", cursors.overlay)\n      .merge(overlay)\n        .each(function() {\n          var extent = local$1(this).extent;\n          select(this)\n              .attr(\"x\", extent[0][0])\n              .attr(\"y\", extent[0][1])\n              .attr(\"width\", extent[1][0] - extent[0][0])\n              .attr(\"height\", extent[1][1] - extent[0][1]);\n        });\n\n    group.selectAll(\".selection\")\n      .data([type(\"selection\")])\n      .enter().append(\"rect\")\n        .attr(\"class\", \"selection\")\n        .attr(\"cursor\", cursors.selection)\n        .attr(\"fill\", \"#777\")\n        .attr(\"fill-opacity\", 0.3)\n        .attr(\"stroke\", \"#fff\")\n        .attr(\"shape-rendering\", \"crispEdges\");\n\n    var handle = group.selectAll(\".handle\")\n      .data(dim.handles, function(d) { return d.type; });\n\n    handle.exit().remove();\n\n    handle.enter().append(\"rect\")\n        .attr(\"class\", function(d) { return \"handle handle--\" + d.type; })\n        .attr(\"cursor\", function(d) { return cursors[d.type]; });\n\n    group\n        .each(redraw)\n        .attr(\"fill\", \"none\")\n        .attr(\"pointer-events\", \"all\")\n        .on(\"mousedown.brush\", started)\n      .filter(touchable)\n        .on(\"touchstart.brush\", started)\n        .on(\"touchmove.brush\", touchmoved)\n        .on(\"touchend.brush touchcancel.brush\", touchended)\n        .style(\"touch-action\", \"none\")\n        .style(\"-webkit-tap-highlight-color\", \"rgba(0,0,0,0)\");\n  }\n\n  brush.move = function(group, selection) {\n    if (group.selection) {\n      group\n          .on(\"start.brush\", function() { emitter(this, arguments).beforestart().start(); })\n          .on(\"interrupt.brush end.brush\", function() { emitter(this, arguments).end(); })\n          .tween(\"brush\", function() {\n            var that = this,\n                state = that.__brush,\n                emit = emitter(that, arguments),\n                selection0 = state.selection,\n                selection1 = dim.input(typeof selection === \"function\" ? selection.apply(this, arguments) : selection, state.extent),\n                i = interpolateValue(selection0, selection1);\n\n            function tween(t) {\n              state.selection = t === 1 && selection1 === null ? null : i(t);\n              redraw.call(that);\n              emit.brush();\n            }\n\n            return selection0 !== null && selection1 !== null ? tween : tween(1);\n          });\n    } else {\n      group\n          .each(function() {\n            var that = this,\n                args = arguments,\n                state = that.__brush,\n                selection1 = dim.input(typeof selection === \"function\" ? selection.apply(that, args) : selection, state.extent),\n                emit = emitter(that, args).beforestart();\n\n            interrupt(that);\n            state.selection = selection1 === null ? null : selection1;\n            redraw.call(that);\n            emit.start().brush().end();\n          });\n    }\n  };\n\n  brush.clear = function(group) {\n    brush.move(group, null);\n  };\n\n  function redraw() {\n    var group = select(this),\n        selection = local$1(this).selection;\n\n    if (selection) {\n      group.selectAll(\".selection\")\n          .style(\"display\", null)\n          .attr(\"x\", selection[0][0])\n          .attr(\"y\", selection[0][1])\n          .attr(\"width\", selection[1][0] - selection[0][0])\n          .attr(\"height\", selection[1][1] - selection[0][1]);\n\n      group.selectAll(\".handle\")\n          .style(\"display\", null)\n          .attr(\"x\", function(d) { return d.type[d.type.length - 1] === \"e\" ? selection[1][0] - handleSize / 2 : selection[0][0] - handleSize / 2; })\n          .attr(\"y\", function(d) { return d.type[0] === \"s\" ? selection[1][1] - handleSize / 2 : selection[0][1] - handleSize / 2; })\n          .attr(\"width\", function(d) { return d.type === \"n\" || d.type === \"s\" ? selection[1][0] - selection[0][0] + handleSize : handleSize; })\n          .attr(\"height\", function(d) { return d.type === \"e\" || d.type === \"w\" ? selection[1][1] - selection[0][1] + handleSize : handleSize; });\n    }\n\n    else {\n      group.selectAll(\".selection,.handle\")\n          .style(\"display\", \"none\")\n          .attr(\"x\", null)\n          .attr(\"y\", null)\n          .attr(\"width\", null)\n          .attr(\"height\", null);\n    }\n  }\n\n  function emitter(that, args, clean) {\n    return (!clean && that.__brush.emitter) || new Emitter(that, args);\n  }\n\n  function Emitter(that, args) {\n    this.that = that;\n    this.args = args;\n    this.state = that.__brush;\n    this.active = 0;\n  }\n\n  Emitter.prototype = {\n    beforestart: function() {\n      if (++this.active === 1) this.state.emitter = this, this.starting = true;\n      return this;\n    },\n    start: function() {\n      if (this.starting) this.starting = false, this.emit(\"start\");\n      else this.emit(\"brush\");\n      return this;\n    },\n    brush: function() {\n      this.emit(\"brush\");\n      return this;\n    },\n    end: function() {\n      if (--this.active === 0) delete this.state.emitter, this.emit(\"end\");\n      return this;\n    },\n    emit: function(type) {\n      customEvent(new BrushEvent(brush, type, dim.output(this.state.selection)), listeners.apply, listeners, [type, this.that, this.args]);\n    }\n  };\n\n  function started() {\n    if (touchending && !exports.event.touches) return;\n    if (!filter.apply(this, arguments)) return;\n\n    var that = this,\n        type = exports.event.target.__data__.type,\n        mode = (keys && exports.event.metaKey ? type = \"overlay\" : type) === \"selection\" ? MODE_DRAG : (keys && exports.event.altKey ? MODE_CENTER : MODE_HANDLE),\n        signX = dim === Y ? null : signsX[type],\n        signY = dim === X ? null : signsY[type],\n        state = local$1(that),\n        extent = state.extent,\n        selection = state.selection,\n        W = extent[0][0], w0, w1,\n        N = extent[0][1], n0, n1,\n        E = extent[1][0], e0, e1,\n        S = extent[1][1], s0, s1,\n        dx = 0,\n        dy = 0,\n        moving,\n        shifting = signX && signY && keys && exports.event.shiftKey,\n        lockX,\n        lockY,\n        pointer = exports.event.touches ? toucher(exports.event.changedTouches[0].identifier) : mouse,\n        point0 = pointer(that),\n        point = point0,\n        emit = emitter(that, arguments, true).beforestart();\n\n    if (type === \"overlay\") {\n      if (selection) moving = true;\n      state.selection = selection = [\n        [w0 = dim === Y ? W : point0[0], n0 = dim === X ? N : point0[1]],\n        [e0 = dim === Y ? E : w0, s0 = dim === X ? S : n0]\n      ];\n    } else {\n      w0 = selection[0][0];\n      n0 = selection[0][1];\n      e0 = selection[1][0];\n      s0 = selection[1][1];\n    }\n\n    w1 = w0;\n    n1 = n0;\n    e1 = e0;\n    s1 = s0;\n\n    var group = select(that)\n        .attr(\"pointer-events\", \"none\");\n\n    var overlay = group.selectAll(\".overlay\")\n        .attr(\"cursor\", cursors[type]);\n\n    if (exports.event.touches) {\n      emit.moved = moved;\n      emit.ended = ended;\n    } else {\n      var view = select(exports.event.view)\n          .on(\"mousemove.brush\", moved, true)\n          .on(\"mouseup.brush\", ended, true);\n      if (keys) view\n          .on(\"keydown.brush\", keydowned, true)\n          .on(\"keyup.brush\", keyupped, true);\n\n      dragDisable(exports.event.view);\n    }\n\n    nopropagation$1();\n    interrupt(that);\n    redraw.call(that);\n    emit.start();\n\n    function moved() {\n      var point1 = pointer(that);\n      if (shifting && !lockX && !lockY) {\n        if (Math.abs(point1[0] - point[0]) > Math.abs(point1[1] - point[1])) lockY = true;\n        else lockX = true;\n      }\n      point = point1;\n      moving = true;\n      noevent$1();\n      move();\n    }\n\n    function move() {\n      var t;\n\n      dx = point[0] - point0[0];\n      dy = point[1] - point0[1];\n\n      switch (mode) {\n        case MODE_SPACE:\n        case MODE_DRAG: {\n          if (signX) dx = Math.max(W - w0, Math.min(E - e0, dx)), w1 = w0 + dx, e1 = e0 + dx;\n          if (signY) dy = Math.max(N - n0, Math.min(S - s0, dy)), n1 = n0 + dy, s1 = s0 + dy;\n          break;\n        }\n        case MODE_HANDLE: {\n          if (signX < 0) dx = Math.max(W - w0, Math.min(E - w0, dx)), w1 = w0 + dx, e1 = e0;\n          else if (signX > 0) dx = Math.max(W - e0, Math.min(E - e0, dx)), w1 = w0, e1 = e0 + dx;\n          if (signY < 0) dy = Math.max(N - n0, Math.min(S - n0, dy)), n1 = n0 + dy, s1 = s0;\n          else if (signY > 0) dy = Math.max(N - s0, Math.min(S - s0, dy)), n1 = n0, s1 = s0 + dy;\n          break;\n        }\n        case MODE_CENTER: {\n          if (signX) w1 = Math.max(W, Math.min(E, w0 - dx * signX)), e1 = Math.max(W, Math.min(E, e0 + dx * signX));\n          if (signY) n1 = Math.max(N, Math.min(S, n0 - dy * signY)), s1 = Math.max(N, Math.min(S, s0 + dy * signY));\n          break;\n        }\n      }\n\n      if (e1 < w1) {\n        signX *= -1;\n        t = w0, w0 = e0, e0 = t;\n        t = w1, w1 = e1, e1 = t;\n        if (type in flipX) overlay.attr(\"cursor\", cursors[type = flipX[type]]);\n      }\n\n      if (s1 < n1) {\n        signY *= -1;\n        t = n0, n0 = s0, s0 = t;\n        t = n1, n1 = s1, s1 = t;\n        if (type in flipY) overlay.attr(\"cursor\", cursors[type = flipY[type]]);\n      }\n\n      if (state.selection) selection = state.selection; // May be set by brush.move!\n      if (lockX) w1 = selection[0][0], e1 = selection[1][0];\n      if (lockY) n1 = selection[0][1], s1 = selection[1][1];\n\n      if (selection[0][0] !== w1\n          || selection[0][1] !== n1\n          || selection[1][0] !== e1\n          || selection[1][1] !== s1) {\n        state.selection = [[w1, n1], [e1, s1]];\n        redraw.call(that);\n        emit.brush();\n      }\n    }\n\n    function ended() {\n      nopropagation$1();\n      if (exports.event.touches) {\n        if (exports.event.touches.length) return;\n        if (touchending) clearTimeout(touchending);\n        touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!\n      } else {\n        yesdrag(exports.event.view, moving);\n        view.on(\"keydown.brush keyup.brush mousemove.brush mouseup.brush\", null);\n      }\n      group.attr(\"pointer-events\", \"all\");\n      overlay.attr(\"cursor\", cursors.overlay);\n      if (state.selection) selection = state.selection; // May be set by brush.move (on start)!\n      if (empty$1(selection)) state.selection = null, redraw.call(that);\n      emit.end();\n    }\n\n    function keydowned() {\n      switch (exports.event.keyCode) {\n        case 16: { // SHIFT\n          shifting = signX && signY;\n          break;\n        }\n        case 18: { // ALT\n          if (mode === MODE_HANDLE) {\n            if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;\n            if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;\n            mode = MODE_CENTER;\n            move();\n          }\n          break;\n        }\n        case 32: { // SPACE; takes priority over ALT\n          if (mode === MODE_HANDLE || mode === MODE_CENTER) {\n            if (signX < 0) e0 = e1 - dx; else if (signX > 0) w0 = w1 - dx;\n            if (signY < 0) s0 = s1 - dy; else if (signY > 0) n0 = n1 - dy;\n            mode = MODE_SPACE;\n            overlay.attr(\"cursor\", cursors.selection);\n            move();\n          }\n          break;\n        }\n        default: return;\n      }\n      noevent$1();\n    }\n\n    function keyupped() {\n      switch (exports.event.keyCode) {\n        case 16: { // SHIFT\n          if (shifting) {\n            lockX = lockY = shifting = false;\n            move();\n          }\n          break;\n        }\n        case 18: { // ALT\n          if (mode === MODE_CENTER) {\n            if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;\n            if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;\n            mode = MODE_HANDLE;\n            move();\n          }\n          break;\n        }\n        case 32: { // SPACE\n          if (mode === MODE_SPACE) {\n            if (exports.event.altKey) {\n              if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;\n              if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;\n              mode = MODE_CENTER;\n            } else {\n              if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;\n              if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;\n              mode = MODE_HANDLE;\n            }\n            overlay.attr(\"cursor\", cursors[type]);\n            move();\n          }\n          break;\n        }\n        default: return;\n      }\n      noevent$1();\n    }\n  }\n\n  function touchmoved() {\n    emitter(this, arguments).moved();\n  }\n\n  function touchended() {\n    emitter(this, arguments).ended();\n  }\n\n  function initialize() {\n    var state = this.__brush || {selection: null};\n    state.extent = number2(extent.apply(this, arguments));\n    state.dim = dim;\n    return state;\n  }\n\n  brush.extent = function(_) {\n    return arguments.length ? (extent = typeof _ === \"function\" ? _ : constant$4(number2(_)), brush) : extent;\n  };\n\n  brush.filter = function(_) {\n    return arguments.length ? (filter = typeof _ === \"function\" ? _ : constant$4(!!_), brush) : filter;\n  };\n\n  brush.touchable = function(_) {\n    return arguments.length ? (touchable = typeof _ === \"function\" ? _ : constant$4(!!_), brush) : touchable;\n  };\n\n  brush.handleSize = function(_) {\n    return arguments.length ? (handleSize = +_, brush) : handleSize;\n  };\n\n  brush.keyModifiers = function(_) {\n    return arguments.length ? (keys = !!_, brush) : keys;\n  };\n\n  brush.on = function() {\n    var value = listeners.on.apply(listeners, arguments);\n    return value === listeners ? brush : value;\n  };\n\n  return brush;\n}\n\nvar cos = Math.cos;\nvar sin = Math.sin;\nvar pi$1 = Math.PI;\nvar halfPi$1 = pi$1 / 2;\nvar tau$1 = pi$1 * 2;\nvar max$1 = Math.max;\n\nfunction compareValue(compare) {\n  return function(a, b) {\n    return compare(\n      a.source.value + a.target.value,\n      b.source.value + b.target.value\n    );\n  };\n}\n\nfunction chord() {\n  var padAngle = 0,\n      sortGroups = null,\n      sortSubgroups = null,\n      sortChords = null;\n\n  function chord(matrix) {\n    var n = matrix.length,\n        groupSums = [],\n        groupIndex = sequence(n),\n        subgroupIndex = [],\n        chords = [],\n        groups = chords.groups = new Array(n),\n        subgroups = new Array(n * n),\n        k,\n        x,\n        x0,\n        dx,\n        i,\n        j;\n\n    // Compute the sum.\n    k = 0, i = -1; while (++i < n) {\n      x = 0, j = -1; while (++j < n) {\n        x += matrix[i][j];\n      }\n      groupSums.push(x);\n      subgroupIndex.push(sequence(n));\n      k += x;\n    }\n\n    // Sort groups…\n    if (sortGroups) groupIndex.sort(function(a, b) {\n      return sortGroups(groupSums[a], groupSums[b]);\n    });\n\n    // Sort subgroups…\n    if (sortSubgroups) subgroupIndex.forEach(function(d, i) {\n      d.sort(function(a, b) {\n        return sortSubgroups(matrix[i][a], matrix[i][b]);\n      });\n    });\n\n    // Convert the sum to scaling factor for [0, 2pi].\n    // TODO Allow start and end angle to be specified?\n    // TODO Allow padding to be specified as percentage?\n    k = max$1(0, tau$1 - padAngle * n) / k;\n    dx = k ? padAngle : tau$1 / n;\n\n    // Compute the start and end angle for each group and subgroup.\n    // Note: Opera has a bug reordering object literal properties!\n    x = 0, i = -1; while (++i < n) {\n      x0 = x, j = -1; while (++j < n) {\n        var di = groupIndex[i],\n            dj = subgroupIndex[di][j],\n            v = matrix[di][dj],\n            a0 = x,\n            a1 = x += v * k;\n        subgroups[dj * n + di] = {\n          index: di,\n          subindex: dj,\n          startAngle: a0,\n          endAngle: a1,\n          value: v\n        };\n      }\n      groups[di] = {\n        index: di,\n        startAngle: x0,\n        endAngle: x,\n        value: groupSums[di]\n      };\n      x += dx;\n    }\n\n    // Generate chords for each (non-empty) subgroup-subgroup link.\n    i = -1; while (++i < n) {\n      j = i - 1; while (++j < n) {\n        var source = subgroups[j * n + i],\n            target = subgroups[i * n + j];\n        if (source.value || target.value) {\n          chords.push(source.value < target.value\n              ? {source: target, target: source}\n              : {source: source, target: target});\n        }\n      }\n    }\n\n    return sortChords ? chords.sort(sortChords) : chords;\n  }\n\n  chord.padAngle = function(_) {\n    return arguments.length ? (padAngle = max$1(0, _), chord) : padAngle;\n  };\n\n  chord.sortGroups = function(_) {\n    return arguments.length ? (sortGroups = _, chord) : sortGroups;\n  };\n\n  chord.sortSubgroups = function(_) {\n    return arguments.length ? (sortSubgroups = _, chord) : sortSubgroups;\n  };\n\n  chord.sortChords = function(_) {\n    return arguments.length ? (_ == null ? sortChords = null : (sortChords = compareValue(_))._ = _, chord) : sortChords && sortChords._;\n  };\n\n  return chord;\n}\n\nvar slice$2 = Array.prototype.slice;\n\nfunction constant$5(x) {\n  return function() {\n    return x;\n  };\n}\n\nvar pi$2 = Math.PI,\n    tau$2 = 2 * pi$2,\n    epsilon$1 = 1e-6,\n    tauEpsilon = tau$2 - epsilon$1;\n\nfunction Path() {\n  this._x0 = this._y0 = // start of current subpath\n  this._x1 = this._y1 = null; // end of current subpath\n  this._ = \"\";\n}\n\nfunction path() {\n  return new Path;\n}\n\nPath.prototype = path.prototype = {\n  constructor: Path,\n  moveTo: function(x, y) {\n    this._ += \"M\" + (this._x0 = this._x1 = +x) + \",\" + (this._y0 = this._y1 = +y);\n  },\n  closePath: function() {\n    if (this._x1 !== null) {\n      this._x1 = this._x0, this._y1 = this._y0;\n      this._ += \"Z\";\n    }\n  },\n  lineTo: function(x, y) {\n    this._ += \"L\" + (this._x1 = +x) + \",\" + (this._y1 = +y);\n  },\n  quadraticCurveTo: function(x1, y1, x, y) {\n    this._ += \"Q\" + (+x1) + \",\" + (+y1) + \",\" + (this._x1 = +x) + \",\" + (this._y1 = +y);\n  },\n  bezierCurveTo: function(x1, y1, x2, y2, x, y) {\n    this._ += \"C\" + (+x1) + \",\" + (+y1) + \",\" + (+x2) + \",\" + (+y2) + \",\" + (this._x1 = +x) + \",\" + (this._y1 = +y);\n  },\n  arcTo: function(x1, y1, x2, y2, r) {\n    x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;\n    var x0 = this._x1,\n        y0 = this._y1,\n        x21 = x2 - x1,\n        y21 = y2 - y1,\n        x01 = x0 - x1,\n        y01 = y0 - y1,\n        l01_2 = x01 * x01 + y01 * y01;\n\n    // Is the radius negative? Error.\n    if (r < 0) throw new Error(\"negative radius: \" + r);\n\n    // Is this path empty? Move to (x1,y1).\n    if (this._x1 === null) {\n      this._ += \"M\" + (this._x1 = x1) + \",\" + (this._y1 = y1);\n    }\n\n    // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.\n    else if (!(l01_2 > epsilon$1));\n\n    // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?\n    // Equivalently, is (x1,y1) coincident with (x2,y2)?\n    // Or, is the radius zero? Line to (x1,y1).\n    else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon$1) || !r) {\n      this._ += \"L\" + (this._x1 = x1) + \",\" + (this._y1 = y1);\n    }\n\n    // Otherwise, draw an arc!\n    else {\n      var x20 = x2 - x0,\n          y20 = y2 - y0,\n          l21_2 = x21 * x21 + y21 * y21,\n          l20_2 = x20 * x20 + y20 * y20,\n          l21 = Math.sqrt(l21_2),\n          l01 = Math.sqrt(l01_2),\n          l = r * Math.tan((pi$2 - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),\n          t01 = l / l01,\n          t21 = l / l21;\n\n      // If the start tangent is not coincident with (x0,y0), line to.\n      if (Math.abs(t01 - 1) > epsilon$1) {\n        this._ += \"L\" + (x1 + t01 * x01) + \",\" + (y1 + t01 * y01);\n      }\n\n      this._ += \"A\" + r + \",\" + r + \",0,0,\" + (+(y01 * x20 > x01 * y20)) + \",\" + (this._x1 = x1 + t21 * x21) + \",\" + (this._y1 = y1 + t21 * y21);\n    }\n  },\n  arc: function(x, y, r, a0, a1, ccw) {\n    x = +x, y = +y, r = +r, ccw = !!ccw;\n    var dx = r * Math.cos(a0),\n        dy = r * Math.sin(a0),\n        x0 = x + dx,\n        y0 = y + dy,\n        cw = 1 ^ ccw,\n        da = ccw ? a0 - a1 : a1 - a0;\n\n    // Is the radius negative? Error.\n    if (r < 0) throw new Error(\"negative radius: \" + r);\n\n    // Is this path empty? Move to (x0,y0).\n    if (this._x1 === null) {\n      this._ += \"M\" + x0 + \",\" + y0;\n    }\n\n    // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).\n    else if (Math.abs(this._x1 - x0) > epsilon$1 || Math.abs(this._y1 - y0) > epsilon$1) {\n      this._ += \"L\" + x0 + \",\" + y0;\n    }\n\n    // Is this arc empty? We’re done.\n    if (!r) return;\n\n    // Does the angle go the wrong way? Flip the direction.\n    if (da < 0) da = da % tau$2 + tau$2;\n\n    // Is this a complete circle? Draw two arcs to complete the circle.\n    if (da > tauEpsilon) {\n      this._ += \"A\" + r + \",\" + r + \",0,1,\" + cw + \",\" + (x - dx) + \",\" + (y - dy) + \"A\" + r + \",\" + r + \",0,1,\" + cw + \",\" + (this._x1 = x0) + \",\" + (this._y1 = y0);\n    }\n\n    // Is this arc non-empty? Draw an arc!\n    else if (da > epsilon$1) {\n      this._ += \"A\" + r + \",\" + r + \",0,\" + (+(da >= pi$2)) + \",\" + cw + \",\" + (this._x1 = x + r * Math.cos(a1)) + \",\" + (this._y1 = y + r * Math.sin(a1));\n    }\n  },\n  rect: function(x, y, w, h) {\n    this._ += \"M\" + (this._x0 = this._x1 = +x) + \",\" + (this._y0 = this._y1 = +y) + \"h\" + (+w) + \"v\" + (+h) + \"h\" + (-w) + \"Z\";\n  },\n  toString: function() {\n    return this._;\n  }\n};\n\nfunction defaultSource(d) {\n  return d.source;\n}\n\nfunction defaultTarget(d) {\n  return d.target;\n}\n\nfunction defaultRadius(d) {\n  return d.radius;\n}\n\nfunction defaultStartAngle(d) {\n  return d.startAngle;\n}\n\nfunction defaultEndAngle(d) {\n  return d.endAngle;\n}\n\nfunction ribbon() {\n  var source = defaultSource,\n      target = defaultTarget,\n      radius = defaultRadius,\n      startAngle = defaultStartAngle,\n      endAngle = defaultEndAngle,\n      context = null;\n\n  function ribbon() {\n    var buffer,\n        argv = slice$2.call(arguments),\n        s = source.apply(this, argv),\n        t = target.apply(this, argv),\n        sr = +radius.apply(this, (argv[0] = s, argv)),\n        sa0 = startAngle.apply(this, argv) - halfPi$1,\n        sa1 = endAngle.apply(this, argv) - halfPi$1,\n        sx0 = sr * cos(sa0),\n        sy0 = sr * sin(sa0),\n        tr = +radius.apply(this, (argv[0] = t, argv)),\n        ta0 = startAngle.apply(this, argv) - halfPi$1,\n        ta1 = endAngle.apply(this, argv) - halfPi$1;\n\n    if (!context) context = buffer = path();\n\n    context.moveTo(sx0, sy0);\n    context.arc(0, 0, sr, sa0, sa1);\n    if (sa0 !== ta0 || sa1 !== ta1) { // TODO sr !== tr?\n      context.quadraticCurveTo(0, 0, tr * cos(ta0), tr * sin(ta0));\n      context.arc(0, 0, tr, ta0, ta1);\n    }\n    context.quadraticCurveTo(0, 0, sx0, sy0);\n    context.closePath();\n\n    if (buffer) return context = null, buffer + \"\" || null;\n  }\n\n  ribbon.radius = function(_) {\n    return arguments.length ? (radius = typeof _ === \"function\" ? _ : constant$5(+_), ribbon) : radius;\n  };\n\n  ribbon.startAngle = function(_) {\n    return arguments.length ? (startAngle = typeof _ === \"function\" ? _ : constant$5(+_), ribbon) : startAngle;\n  };\n\n  ribbon.endAngle = function(_) {\n    return arguments.length ? (endAngle = typeof _ === \"function\" ? _ : constant$5(+_), ribbon) : endAngle;\n  };\n\n  ribbon.source = function(_) {\n    return arguments.length ? (source = _, ribbon) : source;\n  };\n\n  ribbon.target = function(_) {\n    return arguments.length ? (target = _, ribbon) : target;\n  };\n\n  ribbon.context = function(_) {\n    return arguments.length ? ((context = _ == null ? null : _), ribbon) : context;\n  };\n\n  return ribbon;\n}\n\nvar prefix = \"$\";\n\nfunction Map() {}\n\nMap.prototype = map$1.prototype = {\n  constructor: Map,\n  has: function(key) {\n    return (prefix + key) in this;\n  },\n  get: function(key) {\n    return this[prefix + key];\n  },\n  set: function(key, value) {\n    this[prefix + key] = value;\n    return this;\n  },\n  remove: function(key) {\n    var property = prefix + key;\n    return property in this && delete this[property];\n  },\n  clear: function() {\n    for (var property in this) if (property[0] === prefix) delete this[property];\n  },\n  keys: function() {\n    var keys = [];\n    for (var property in this) if (property[0] === prefix) keys.push(property.slice(1));\n    return keys;\n  },\n  values: function() {\n    var values = [];\n    for (var property in this) if (property[0] === prefix) values.push(this[property]);\n    return values;\n  },\n  entries: function() {\n    var entries = [];\n    for (var property in this) if (property[0] === prefix) entries.push({key: property.slice(1), value: this[property]});\n    return entries;\n  },\n  size: function() {\n    var size = 0;\n    for (var property in this) if (property[0] === prefix) ++size;\n    return size;\n  },\n  empty: function() {\n    for (var property in this) if (property[0] === prefix) return false;\n    return true;\n  },\n  each: function(f) {\n    for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this);\n  }\n};\n\nfunction map$1(object, f) {\n  var map = new Map;\n\n  // Copy constructor.\n  if (object instanceof Map) object.each(function(value, key) { map.set(key, value); });\n\n  // Index array by numeric index or specified key function.\n  else if (Array.isArray(object)) {\n    var i = -1,\n        n = object.length,\n        o;\n\n    if (f == null) while (++i < n) map.set(i, object[i]);\n    else while (++i < n) map.set(f(o = object[i], i, object), o);\n  }\n\n  // Convert object to map.\n  else if (object) for (var key in object) map.set(key, object[key]);\n\n  return map;\n}\n\nfunction nest() {\n  var keys = [],\n      sortKeys = [],\n      sortValues,\n      rollup,\n      nest;\n\n  function apply(array, depth, createResult, setResult) {\n    if (depth >= keys.length) {\n      if (sortValues != null) array.sort(sortValues);\n      return rollup != null ? rollup(array) : array;\n    }\n\n    var i = -1,\n        n = array.length,\n        key = keys[depth++],\n        keyValue,\n        value,\n        valuesByKey = map$1(),\n        values,\n        result = createResult();\n\n    while (++i < n) {\n      if (values = valuesByKey.get(keyValue = key(value = array[i]) + \"\")) {\n        values.push(value);\n      } else {\n        valuesByKey.set(keyValue, [value]);\n      }\n    }\n\n    valuesByKey.each(function(values, key) {\n      setResult(result, key, apply(values, depth, createResult, setResult));\n    });\n\n    return result;\n  }\n\n  function entries(map, depth) {\n    if (++depth > keys.length) return map;\n    var array, sortKey = sortKeys[depth - 1];\n    if (rollup != null && depth >= keys.length) array = map.entries();\n    else array = [], map.each(function(v, k) { array.push({key: k, values: entries(v, depth)}); });\n    return sortKey != null ? array.sort(function(a, b) { return sortKey(a.key, b.key); }) : array;\n  }\n\n  return nest = {\n    object: function(array) { return apply(array, 0, createObject, setObject); },\n    map: function(array) { return apply(array, 0, createMap, setMap); },\n    entries: function(array) { return entries(apply(array, 0, createMap, setMap), 0); },\n    key: function(d) { keys.push(d); return nest; },\n    sortKeys: function(order) { sortKeys[keys.length - 1] = order; return nest; },\n    sortValues: function(order) { sortValues = order; return nest; },\n    rollup: function(f) { rollup = f; return nest; }\n  };\n}\n\nfunction createObject() {\n  return {};\n}\n\nfunction setObject(object, key, value) {\n  object[key] = value;\n}\n\nfunction createMap() {\n  return map$1();\n}\n\nfunction setMap(map, key, value) {\n  map.set(key, value);\n}\n\nfunction Set() {}\n\nvar proto = map$1.prototype;\n\nSet.prototype = set$2.prototype = {\n  constructor: Set,\n  has: proto.has,\n  add: function(value) {\n    value += \"\";\n    this[prefix + value] = value;\n    return this;\n  },\n  remove: proto.remove,\n  clear: proto.clear,\n  values: proto.keys,\n  size: proto.size,\n  empty: proto.empty,\n  each: proto.each\n};\n\nfunction set$2(object, f) {\n  var set = new Set;\n\n  // Copy constructor.\n  if (object instanceof Set) object.each(function(value) { set.add(value); });\n\n  // Otherwise, assume it’s an array.\n  else if (object) {\n    var i = -1, n = object.length;\n    if (f == null) while (++i < n) set.add(object[i]);\n    else while (++i < n) set.add(f(object[i], i, object));\n  }\n\n  return set;\n}\n\nfunction keys(map) {\n  var keys = [];\n  for (var key in map) keys.push(key);\n  return keys;\n}\n\nfunction values(map) {\n  var values = [];\n  for (var key in map) values.push(map[key]);\n  return values;\n}\n\nfunction entries(map) {\n  var entries = [];\n  for (var key in map) entries.push({key: key, value: map[key]});\n  return entries;\n}\n\nvar array$2 = Array.prototype;\n\nvar slice$3 = array$2.slice;\n\nfunction ascending$2(a, b) {\n  return a - b;\n}\n\nfunction area(ring) {\n  var i = 0, n = ring.length, area = ring[n - 1][1] * ring[0][0] - ring[n - 1][0] * ring[0][1];\n  while (++i < n) area += ring[i - 1][1] * ring[i][0] - ring[i - 1][0] * ring[i][1];\n  return area;\n}\n\nfunction constant$6(x) {\n  return function() {\n    return x;\n  };\n}\n\nfunction contains(ring, hole) {\n  var i = -1, n = hole.length, c;\n  while (++i < n) if (c = ringContains(ring, hole[i])) return c;\n  return 0;\n}\n\nfunction ringContains(ring, point) {\n  var x = point[0], y = point[1], contains = -1;\n  for (var i = 0, n = ring.length, j = n - 1; i < n; j = i++) {\n    var pi = ring[i], xi = pi[0], yi = pi[1], pj = ring[j], xj = pj[0], yj = pj[1];\n    if (segmentContains(pi, pj, point)) return 0;\n    if (((yi > y) !== (yj > y)) && ((x < (xj - xi) * (y - yi) / (yj - yi) + xi))) contains = -contains;\n  }\n  return contains;\n}\n\nfunction segmentContains(a, b, c) {\n  var i; return collinear(a, b, c) && within(a[i = +(a[0] === b[0])], c[i], b[i]);\n}\n\nfunction collinear(a, b, c) {\n  return (b[0] - a[0]) * (c[1] - a[1]) === (c[0] - a[0]) * (b[1] - a[1]);\n}\n\nfunction within(p, q, r) {\n  return p <= q && q <= r || r <= q && q <= p;\n}\n\nfunction noop$1() {}\n\nvar cases = [\n  [],\n  [[[1.0, 1.5], [0.5, 1.0]]],\n  [[[1.5, 1.0], [1.0, 1.5]]],\n  [[[1.5, 1.0], [0.5, 1.0]]],\n  [[[1.0, 0.5], [1.5, 1.0]]],\n  [[[1.0, 1.5], [0.5, 1.0]], [[1.0, 0.5], [1.5, 1.0]]],\n  [[[1.0, 0.5], [1.0, 1.5]]],\n  [[[1.0, 0.5], [0.5, 1.0]]],\n  [[[0.5, 1.0], [1.0, 0.5]]],\n  [[[1.0, 1.5], [1.0, 0.5]]],\n  [[[0.5, 1.0], [1.0, 0.5]], [[1.5, 1.0], [1.0, 1.5]]],\n  [[[1.5, 1.0], [1.0, 0.5]]],\n  [[[0.5, 1.0], [1.5, 1.0]]],\n  [[[1.0, 1.5], [1.5, 1.0]]],\n  [[[0.5, 1.0], [1.0, 1.5]]],\n  []\n];\n\nfunction contours() {\n  var dx = 1,\n      dy = 1,\n      threshold = thresholdSturges,\n      smooth = smoothLinear;\n\n  function contours(values) {\n    var tz = threshold(values);\n\n    // Convert number of thresholds into uniform thresholds.\n    if (!Array.isArray(tz)) {\n      var domain = extent(values), start = domain[0], stop = domain[1];\n      tz = tickStep(start, stop, tz);\n      tz = sequence(Math.floor(start / tz) * tz, Math.floor(stop / tz) * tz, tz);\n    } else {\n      tz = tz.slice().sort(ascending$2);\n    }\n\n    return tz.map(function(value) {\n      return contour(values, value);\n    });\n  }\n\n  // Accumulate, smooth contour rings, assign holes to exterior rings.\n  // Based on https://github.com/mbostock/shapefile/blob/v0.6.2/shp/polygon.js\n  function contour(values, value) {\n    var polygons = [],\n        holes = [];\n\n    isorings(values, value, function(ring) {\n      smooth(ring, values, value);\n      if (area(ring) > 0) polygons.push([ring]);\n      else holes.push(ring);\n    });\n\n    holes.forEach(function(hole) {\n      for (var i = 0, n = polygons.length, polygon; i < n; ++i) {\n        if (contains((polygon = polygons[i])[0], hole) !== -1) {\n          polygon.push(hole);\n          return;\n        }\n      }\n    });\n\n    return {\n      type: \"MultiPolygon\",\n      value: value,\n      coordinates: polygons\n    };\n  }\n\n  // Marching squares with isolines stitched into rings.\n  // Based on https://github.com/topojson/topojson-client/blob/v3.0.0/src/stitch.js\n  function isorings(values, value, callback) {\n    var fragmentByStart = new Array,\n        fragmentByEnd = new Array,\n        x, y, t0, t1, t2, t3;\n\n    // Special case for the first row (y = -1, t2 = t3 = 0).\n    x = y = -1;\n    t1 = values[0] >= value;\n    cases[t1 << 1].forEach(stitch);\n    while (++x < dx - 1) {\n      t0 = t1, t1 = values[x + 1] >= value;\n      cases[t0 | t1 << 1].forEach(stitch);\n    }\n    cases[t1 << 0].forEach(stitch);\n\n    // General case for the intermediate rows.\n    while (++y < dy - 1) {\n      x = -1;\n      t1 = values[y * dx + dx] >= value;\n      t2 = values[y * dx] >= value;\n      cases[t1 << 1 | t2 << 2].forEach(stitch);\n      while (++x < dx - 1) {\n        t0 = t1, t1 = values[y * dx + dx + x + 1] >= value;\n        t3 = t2, t2 = values[y * dx + x + 1] >= value;\n        cases[t0 | t1 << 1 | t2 << 2 | t3 << 3].forEach(stitch);\n      }\n      cases[t1 | t2 << 3].forEach(stitch);\n    }\n\n    // Special case for the last row (y = dy - 1, t0 = t1 = 0).\n    x = -1;\n    t2 = values[y * dx] >= value;\n    cases[t2 << 2].forEach(stitch);\n    while (++x < dx - 1) {\n      t3 = t2, t2 = values[y * dx + x + 1] >= value;\n      cases[t2 << 2 | t3 << 3].forEach(stitch);\n    }\n    cases[t2 << 3].forEach(stitch);\n\n    function stitch(line) {\n      var start = [line[0][0] + x, line[0][1] + y],\n          end = [line[1][0] + x, line[1][1] + y],\n          startIndex = index(start),\n          endIndex = index(end),\n          f, g;\n      if (f = fragmentByEnd[startIndex]) {\n        if (g = fragmentByStart[endIndex]) {\n          delete fragmentByEnd[f.end];\n          delete fragmentByStart[g.start];\n          if (f === g) {\n            f.ring.push(end);\n            callback(f.ring);\n          } else {\n            fragmentByStart[f.start] = fragmentByEnd[g.end] = {start: f.start, end: g.end, ring: f.ring.concat(g.ring)};\n          }\n        } else {\n          delete fragmentByEnd[f.end];\n          f.ring.push(end);\n          fragmentByEnd[f.end = endIndex] = f;\n        }\n      } else if (f = fragmentByStart[endIndex]) {\n        if (g = fragmentByEnd[startIndex]) {\n          delete fragmentByStart[f.start];\n          delete fragmentByEnd[g.end];\n          if (f === g) {\n            f.ring.push(end);\n            callback(f.ring);\n          } else {\n            fragmentByStart[g.start] = fragmentByEnd[f.end] = {start: g.start, end: f.end, ring: g.ring.concat(f.ring)};\n          }\n        } else {\n          delete fragmentByStart[f.start];\n          f.ring.unshift(start);\n          fragmentByStart[f.start = startIndex] = f;\n        }\n      } else {\n        fragmentByStart[startIndex] = fragmentByEnd[endIndex] = {start: startIndex, end: endIndex, ring: [start, end]};\n      }\n    }\n  }\n\n  function index(point) {\n    return point[0] * 2 + point[1] * (dx + 1) * 4;\n  }\n\n  function smoothLinear(ring, values, value) {\n    ring.forEach(function(point) {\n      var x = point[0],\n          y = point[1],\n          xt = x | 0,\n          yt = y | 0,\n          v0,\n          v1 = values[yt * dx + xt];\n      if (x > 0 && x < dx && xt === x) {\n        v0 = values[yt * dx + xt - 1];\n        point[0] = x + (value - v0) / (v1 - v0) - 0.5;\n      }\n      if (y > 0 && y < dy && yt === y) {\n        v0 = values[(yt - 1) * dx + xt];\n        point[1] = y + (value - v0) / (v1 - v0) - 0.5;\n      }\n    });\n  }\n\n  contours.contour = contour;\n\n  contours.size = function(_) {\n    if (!arguments.length) return [dx, dy];\n    var _0 = Math.ceil(_[0]), _1 = Math.ceil(_[1]);\n    if (!(_0 > 0) || !(_1 > 0)) throw new Error(\"invalid size\");\n    return dx = _0, dy = _1, contours;\n  };\n\n  contours.thresholds = function(_) {\n    return arguments.length ? (threshold = typeof _ === \"function\" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), contours) : threshold;\n  };\n\n  contours.smooth = function(_) {\n    return arguments.length ? (smooth = _ ? smoothLinear : noop$1, contours) : smooth === smoothLinear;\n  };\n\n  return contours;\n}\n\n// TODO Optimize edge cases.\n// TODO Optimize index calculation.\n// TODO Optimize arguments.\nfunction blurX(source, target, r) {\n  var n = source.width,\n      m = source.height,\n      w = (r << 1) + 1;\n  for (var j = 0; j < m; ++j) {\n    for (var i = 0, sr = 0; i < n + r; ++i) {\n      if (i < n) {\n        sr += source.data[i + j * n];\n      }\n      if (i >= r) {\n        if (i >= w) {\n          sr -= source.data[i - w + j * n];\n        }\n        target.data[i - r + j * n] = sr / Math.min(i + 1, n - 1 + w - i, w);\n      }\n    }\n  }\n}\n\n// TODO Optimize edge cases.\n// TODO Optimize index calculation.\n// TODO Optimize arguments.\nfunction blurY(source, target, r) {\n  var n = source.width,\n      m = source.height,\n      w = (r << 1) + 1;\n  for (var i = 0; i < n; ++i) {\n    for (var j = 0, sr = 0; j < m + r; ++j) {\n      if (j < m) {\n        sr += source.data[i + j * n];\n      }\n      if (j >= r) {\n        if (j >= w) {\n          sr -= source.data[i + (j - w) * n];\n        }\n        target.data[i + (j - r) * n] = sr / Math.min(j + 1, m - 1 + w - j, w);\n      }\n    }\n  }\n}\n\nfunction defaultX(d) {\n  return d[0];\n}\n\nfunction defaultY(d) {\n  return d[1];\n}\n\nfunction defaultWeight() {\n  return 1;\n}\n\nfunction density() {\n  var x = defaultX,\n      y = defaultY,\n      weight = defaultWeight,\n      dx = 960,\n      dy = 500,\n      r = 20, // blur radius\n      k = 2, // log2(grid cell size)\n      o = r * 3, // grid offset, to pad for blur\n      n = (dx + o * 2) >> k, // grid width\n      m = (dy + o * 2) >> k, // grid height\n      threshold = constant$6(20);\n\n  function density(data) {\n    var values0 = new Float32Array(n * m),\n        values1 = new Float32Array(n * m);\n\n    data.forEach(function(d, i, data) {\n      var xi = (+x(d, i, data) + o) >> k,\n          yi = (+y(d, i, data) + o) >> k,\n          wi = +weight(d, i, data);\n      if (xi >= 0 && xi < n && yi >= 0 && yi < m) {\n        values0[xi + yi * n] += wi;\n      }\n    });\n\n    // TODO Optimize.\n    blurX({width: n, height: m, data: values0}, {width: n, height: m, data: values1}, r >> k);\n    blurY({width: n, height: m, data: values1}, {width: n, height: m, data: values0}, r >> k);\n    blurX({width: n, height: m, data: values0}, {width: n, height: m, data: values1}, r >> k);\n    blurY({width: n, height: m, data: values1}, {width: n, height: m, data: values0}, r >> k);\n    blurX({width: n, height: m, data: values0}, {width: n, height: m, data: values1}, r >> k);\n    blurY({width: n, height: m, data: values1}, {width: n, height: m, data: values0}, r >> k);\n\n    var tz = threshold(values0);\n\n    // Convert number of thresholds into uniform thresholds.\n    if (!Array.isArray(tz)) {\n      var stop = max(values0);\n      tz = tickStep(0, stop, tz);\n      tz = sequence(0, Math.floor(stop / tz) * tz, tz);\n      tz.shift();\n    }\n\n    return contours()\n        .thresholds(tz)\n        .size([n, m])\n      (values0)\n        .map(transform);\n  }\n\n  function transform(geometry) {\n    geometry.value *= Math.pow(2, -2 * k); // Density in points per square pixel.\n    geometry.coordinates.forEach(transformPolygon);\n    return geometry;\n  }\n\n  function transformPolygon(coordinates) {\n    coordinates.forEach(transformRing);\n  }\n\n  function transformRing(coordinates) {\n    coordinates.forEach(transformPoint);\n  }\n\n  // TODO Optimize.\n  function transformPoint(coordinates) {\n    coordinates[0] = coordinates[0] * Math.pow(2, k) - o;\n    coordinates[1] = coordinates[1] * Math.pow(2, k) - o;\n  }\n\n  function resize() {\n    o = r * 3;\n    n = (dx + o * 2) >> k;\n    m = (dy + o * 2) >> k;\n    return density;\n  }\n\n  density.x = function(_) {\n    return arguments.length ? (x = typeof _ === \"function\" ? _ : constant$6(+_), density) : x;\n  };\n\n  density.y = function(_) {\n    return arguments.length ? (y = typeof _ === \"function\" ? _ : constant$6(+_), density) : y;\n  };\n\n  density.weight = function(_) {\n    return arguments.length ? (weight = typeof _ === \"function\" ? _ : constant$6(+_), density) : weight;\n  };\n\n  density.size = function(_) {\n    if (!arguments.length) return [dx, dy];\n    var _0 = Math.ceil(_[0]), _1 = Math.ceil(_[1]);\n    if (!(_0 >= 0) && !(_0 >= 0)) throw new Error(\"invalid size\");\n    return dx = _0, dy = _1, resize();\n  };\n\n  density.cellSize = function(_) {\n    if (!arguments.length) return 1 << k;\n    if (!((_ = +_) >= 1)) throw new Error(\"invalid cell size\");\n    return k = Math.floor(Math.log(_) / Math.LN2), resize();\n  };\n\n  density.thresholds = function(_) {\n    return arguments.length ? (threshold = typeof _ === \"function\" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), density) : threshold;\n  };\n\n  density.bandwidth = function(_) {\n    if (!arguments.length) return Math.sqrt(r * (r + 1));\n    if (!((_ = +_) >= 0)) throw new Error(\"invalid bandwidth\");\n    return r = Math.round((Math.sqrt(4 * _ * _ + 1) - 1) / 2), resize();\n  };\n\n  return density;\n}\n\nvar EOL = {},\n    EOF = {},\n    QUOTE = 34,\n    NEWLINE = 10,\n    RETURN = 13;\n\nfunction objectConverter(columns) {\n  return new Function(\"d\", \"return {\" + columns.map(function(name, i) {\n    return JSON.stringify(name) + \": d[\" + i + \"] || \\\"\\\"\";\n  }).join(\",\") + \"}\");\n}\n\nfunction customConverter(columns, f) {\n  var object = objectConverter(columns);\n  return function(row, i) {\n    return f(object(row), i, columns);\n  };\n}\n\n// Compute unique columns in order of discovery.\nfunction inferColumns(rows) {\n  var columnSet = Object.create(null),\n      columns = [];\n\n  rows.forEach(function(row) {\n    for (var column in row) {\n      if (!(column in columnSet)) {\n        columns.push(columnSet[column] = column);\n      }\n    }\n  });\n\n  return columns;\n}\n\nfunction pad(value, width) {\n  var s = value + \"\", length = s.length;\n  return length < width ? new Array(width - length + 1).join(0) + s : s;\n}\n\nfunction formatYear(year) {\n  return year < 0 ? \"-\" + pad(-year, 6)\n    : year > 9999 ? \"+\" + pad(year, 6)\n    : pad(year, 4);\n}\n\nfunction formatDate(date) {\n  var hours = date.getUTCHours(),\n      minutes = date.getUTCMinutes(),\n      seconds = date.getUTCSeconds(),\n      milliseconds = date.getUTCMilliseconds();\n  return isNaN(date) ? \"Invalid Date\"\n      : formatYear(date.getUTCFullYear()) + \"-\" + pad(date.getUTCMonth() + 1, 2) + \"-\" + pad(date.getUTCDate(), 2)\n      + (milliseconds ? \"T\" + pad(hours, 2) + \":\" + pad(minutes, 2) + \":\" + pad(seconds, 2) + \".\" + pad(milliseconds, 3) + \"Z\"\n      : seconds ? \"T\" + pad(hours, 2) + \":\" + pad(minutes, 2) + \":\" + pad(seconds, 2) + \"Z\"\n      : minutes || hours ? \"T\" + pad(hours, 2) + \":\" + pad(minutes, 2) + \"Z\"\n      : \"\");\n}\n\nfunction dsvFormat(delimiter) {\n  var reFormat = new RegExp(\"[\\\"\" + delimiter + \"\\n\\r]\"),\n      DELIMITER = delimiter.charCodeAt(0);\n\n  function parse(text, f) {\n    var convert, columns, rows = parseRows(text, function(row, i) {\n      if (convert) return convert(row, i - 1);\n      columns = row, convert = f ? customConverter(row, f) : objectConverter(row);\n    });\n    rows.columns = columns || [];\n    return rows;\n  }\n\n  function parseRows(text, f) {\n    var rows = [], // output rows\n        N = text.length,\n        I = 0, // current character index\n        n = 0, // current line number\n        t, // current token\n        eof = N <= 0, // current token followed by EOF?\n        eol = false; // current token followed by EOL?\n\n    // Strip the trailing newline.\n    if (text.charCodeAt(N - 1) === NEWLINE) --N;\n    if (text.charCodeAt(N - 1) === RETURN) --N;\n\n    function token() {\n      if (eof) return EOF;\n      if (eol) return eol = false, EOL;\n\n      // Unescape quotes.\n      var i, j = I, c;\n      if (text.charCodeAt(j) === QUOTE) {\n        while (I++ < N && text.charCodeAt(I) !== QUOTE || text.charCodeAt(++I) === QUOTE);\n        if ((i = I) >= N) eof = true;\n        else if ((c = text.charCodeAt(I++)) === NEWLINE) eol = true;\n        else if (c === RETURN) { eol = true; if (text.charCodeAt(I) === NEWLINE) ++I; }\n        return text.slice(j + 1, i - 1).replace(/\"\"/g, \"\\\"\");\n      }\n\n      // Find next delimiter or newline.\n      while (I < N) {\n        if ((c = text.charCodeAt(i = I++)) === NEWLINE) eol = true;\n        else if (c === RETURN) { eol = true; if (text.charCodeAt(I) === NEWLINE) ++I; }\n        else if (c !== DELIMITER) continue;\n        return text.slice(j, i);\n      }\n\n      // Return last token before EOF.\n      return eof = true, text.slice(j, N);\n    }\n\n    while ((t = token()) !== EOF) {\n      var row = [];\n      while (t !== EOL && t !== EOF) row.push(t), t = token();\n      if (f && (row = f(row, n++)) == null) continue;\n      rows.push(row);\n    }\n\n    return rows;\n  }\n\n  function preformatBody(rows, columns) {\n    return rows.map(function(row) {\n      return columns.map(function(column) {\n        return formatValue(row[column]);\n      }).join(delimiter);\n    });\n  }\n\n  function format(rows, columns) {\n    if (columns == null) columns = inferColumns(rows);\n    return [columns.map(formatValue).join(delimiter)].concat(preformatBody(rows, columns)).join(\"\\n\");\n  }\n\n  function formatBody(rows, columns) {\n    if (columns == null) columns = inferColumns(rows);\n    return preformatBody(rows, columns).join(\"\\n\");\n  }\n\n  function formatRows(rows) {\n    return rows.map(formatRow).join(\"\\n\");\n  }\n\n  function formatRow(row) {\n    return row.map(formatValue).join(delimiter);\n  }\n\n  function formatValue(value) {\n    return value == null ? \"\"\n        : value instanceof Date ? formatDate(value)\n        : reFormat.test(value += \"\") ? \"\\\"\" + value.replace(/\"/g, \"\\\"\\\"\") + \"\\\"\"\n        : value;\n  }\n\n  return {\n    parse: parse,\n    parseRows: parseRows,\n    format: format,\n    formatBody: formatBody,\n    formatRows: formatRows,\n    formatRow: formatRow,\n    formatValue: formatValue\n  };\n}\n\nvar csv = dsvFormat(\",\");\n\nvar csvParse = csv.parse;\nvar csvParseRows = csv.parseRows;\nvar csvFormat = csv.format;\nvar csvFormatBody = csv.formatBody;\nvar csvFormatRows = csv.formatRows;\nvar csvFormatRow = csv.formatRow;\nvar csvFormatValue = csv.formatValue;\n\nvar tsv = dsvFormat(\"\\t\");\n\nvar tsvParse = tsv.parse;\nvar tsvParseRows = tsv.parseRows;\nvar tsvFormat = tsv.format;\nvar tsvFormatBody = tsv.formatBody;\nvar tsvFormatRows = tsv.formatRows;\nvar tsvFormatRow = tsv.formatRow;\nvar tsvFormatValue = tsv.formatValue;\n\nfunction autoType(object) {\n  for (var key in object) {\n    var value = object[key].trim(), number, m;\n    if (!value) value = null;\n    else if (value === \"true\") value = true;\n    else if (value === \"false\") value = false;\n    else if (value === \"NaN\") value = NaN;\n    else if (!isNaN(number = +value)) value = number;\n    else if (m = value.match(/^([-+]\\d{2})?\\d{4}(-\\d{2}(-\\d{2})?)?(T\\d{2}:\\d{2}(:\\d{2}(\\.\\d{3})?)?(Z|[-+]\\d{2}:\\d{2})?)?$/)) {\n      if (fixtz && !!m[4] && !m[7]) value = value.replace(/-/g, \"/\").replace(/T/, \" \");\n      value = new Date(value);\n    }\n    else continue;\n    object[key] = value;\n  }\n  return object;\n}\n\n// https://github.com/d3/d3-dsv/issues/45\nvar fixtz = new Date(\"2019-01-01T00:00\").getHours() || new Date(\"2019-07-01T00:00\").getHours();\n\nfunction responseBlob(response) {\n  if (!response.ok) throw new Error(response.status + \" \" + response.statusText);\n  return response.blob();\n}\n\nfunction blob(input, init) {\n  return fetch(input, init).then(responseBlob);\n}\n\nfunction responseArrayBuffer(response) {\n  if (!response.ok) throw new Error(response.status + \" \" + response.statusText);\n  return response.arrayBuffer();\n}\n\nfunction buffer(input, init) {\n  return fetch(input, init).then(responseArrayBuffer);\n}\n\nfunction responseText(response) {\n  if (!response.ok) throw new Error(response.status + \" \" + response.statusText);\n  return response.text();\n}\n\nfunction text(input, init) {\n  return fetch(input, init).then(responseText);\n}\n\nfunction dsvParse(parse) {\n  return function(input, init, row) {\n    if (arguments.length === 2 && typeof init === \"function\") row = init, init = undefined;\n    return text(input, init).then(function(response) {\n      return parse(response, row);\n    });\n  };\n}\n\nfunction dsv(delimiter, input, init, row) {\n  if (arguments.length === 3 && typeof init === \"function\") row = init, init = undefined;\n  var format = dsvFormat(delimiter);\n  return text(input, init).then(function(response) {\n    return format.parse(response, row);\n  });\n}\n\nvar csv$1 = dsvParse(csvParse);\nvar tsv$1 = dsvParse(tsvParse);\n\nfunction image(input, init) {\n  return new Promise(function(resolve, reject) {\n    var image = new Image;\n    for (var key in init) image[key] = init[key];\n    image.onerror = reject;\n    image.onload = function() { resolve(image); };\n    image.src = input;\n  });\n}\n\nfunction responseJson(response) {\n  if (!response.ok) throw new Error(response.status + \" \" + response.statusText);\n  return response.json();\n}\n\nfunction json(input, init) {\n  return fetch(input, init).then(responseJson);\n}\n\nfunction parser(type) {\n  return function(input, init)  {\n    return text(input, init).then(function(text) {\n      return (new DOMParser).parseFromString(text, type);\n    });\n  };\n}\n\nvar xml = parser(\"application/xml\");\n\nvar html = parser(\"text/html\");\n\nvar svg = parser(\"image/svg+xml\");\n\nfunction center$1(x, y) {\n  var nodes;\n\n  if (x == null) x = 0;\n  if (y == null) y = 0;\n\n  function force() {\n    var i,\n        n = nodes.length,\n        node,\n        sx = 0,\n        sy = 0;\n\n    for (i = 0; i < n; ++i) {\n      node = nodes[i], sx += node.x, sy += node.y;\n    }\n\n    for (sx = sx / n - x, sy = sy / n - y, i = 0; i < n; ++i) {\n      node = nodes[i], node.x -= sx, node.y -= sy;\n    }\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n  };\n\n  force.x = function(_) {\n    return arguments.length ? (x = +_, force) : x;\n  };\n\n  force.y = function(_) {\n    return arguments.length ? (y = +_, force) : y;\n  };\n\n  return force;\n}\n\nfunction constant$7(x) {\n  return function() {\n    return x;\n  };\n}\n\nfunction jiggle() {\n  return (Math.random() - 0.5) * 1e-6;\n}\n\nfunction tree_add(d) {\n  var x = +this._x.call(null, d),\n      y = +this._y.call(null, d);\n  return add(this.cover(x, y), x, y, d);\n}\n\nfunction add(tree, x, y, d) {\n  if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points\n\n  var parent,\n      node = tree._root,\n      leaf = {data: d},\n      x0 = tree._x0,\n      y0 = tree._y0,\n      x1 = tree._x1,\n      y1 = tree._y1,\n      xm,\n      ym,\n      xp,\n      yp,\n      right,\n      bottom,\n      i,\n      j;\n\n  // If the tree is empty, initialize the root as a leaf.\n  if (!node) return tree._root = leaf, tree;\n\n  // Find the existing leaf for the new point, or add it.\n  while (node.length) {\n    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;\n    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;\n    if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree;\n  }\n\n  // Is the new point is exactly coincident with the existing point?\n  xp = +tree._x.call(null, node.data);\n  yp = +tree._y.call(null, node.data);\n  if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree;\n\n  // Otherwise, split the leaf node until the old and new point are separated.\n  do {\n    parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4);\n    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;\n    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;\n  } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm)));\n  return parent[j] = node, parent[i] = leaf, tree;\n}\n\nfunction addAll(data) {\n  var d, i, n = data.length,\n      x,\n      y,\n      xz = new Array(n),\n      yz = new Array(n),\n      x0 = Infinity,\n      y0 = Infinity,\n      x1 = -Infinity,\n      y1 = -Infinity;\n\n  // Compute the points and their extent.\n  for (i = 0; i < n; ++i) {\n    if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue;\n    xz[i] = x;\n    yz[i] = y;\n    if (x < x0) x0 = x;\n    if (x > x1) x1 = x;\n    if (y < y0) y0 = y;\n    if (y > y1) y1 = y;\n  }\n\n  // If there were no (valid) points, abort.\n  if (x0 > x1 || y0 > y1) return this;\n\n  // Expand the tree to cover the new points.\n  this.cover(x0, y0).cover(x1, y1);\n\n  // Add the new points.\n  for (i = 0; i < n; ++i) {\n    add(this, xz[i], yz[i], data[i]);\n  }\n\n  return this;\n}\n\nfunction tree_cover(x, y) {\n  if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points\n\n  var x0 = this._x0,\n      y0 = this._y0,\n      x1 = this._x1,\n      y1 = this._y1;\n\n  // If the quadtree has no extent, initialize them.\n  // Integer extent are necessary so that if we later double the extent,\n  // the existing quadrant boundaries don’t change due to floating point error!\n  if (isNaN(x0)) {\n    x1 = (x0 = Math.floor(x)) + 1;\n    y1 = (y0 = Math.floor(y)) + 1;\n  }\n\n  // Otherwise, double repeatedly to cover.\n  else {\n    var z = x1 - x0,\n        node = this._root,\n        parent,\n        i;\n\n    while (x0 > x || x >= x1 || y0 > y || y >= y1) {\n      i = (y < y0) << 1 | (x < x0);\n      parent = new Array(4), parent[i] = node, node = parent, z *= 2;\n      switch (i) {\n        case 0: x1 = x0 + z, y1 = y0 + z; break;\n        case 1: x0 = x1 - z, y1 = y0 + z; break;\n        case 2: x1 = x0 + z, y0 = y1 - z; break;\n        case 3: x0 = x1 - z, y0 = y1 - z; break;\n      }\n    }\n\n    if (this._root && this._root.length) this._root = node;\n  }\n\n  this._x0 = x0;\n  this._y0 = y0;\n  this._x1 = x1;\n  this._y1 = y1;\n  return this;\n}\n\nfunction tree_data() {\n  var data = [];\n  this.visit(function(node) {\n    if (!node.length) do data.push(node.data); while (node = node.next)\n  });\n  return data;\n}\n\nfunction tree_extent(_) {\n  return arguments.length\n      ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1])\n      : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]];\n}\n\nfunction Quad(node, x0, y0, x1, y1) {\n  this.node = node;\n  this.x0 = x0;\n  this.y0 = y0;\n  this.x1 = x1;\n  this.y1 = y1;\n}\n\nfunction tree_find(x, y, radius) {\n  var data,\n      x0 = this._x0,\n      y0 = this._y0,\n      x1,\n      y1,\n      x2,\n      y2,\n      x3 = this._x1,\n      y3 = this._y1,\n      quads = [],\n      node = this._root,\n      q,\n      i;\n\n  if (node) quads.push(new Quad(node, x0, y0, x3, y3));\n  if (radius == null) radius = Infinity;\n  else {\n    x0 = x - radius, y0 = y - radius;\n    x3 = x + radius, y3 = y + radius;\n    radius *= radius;\n  }\n\n  while (q = quads.pop()) {\n\n    // Stop searching if this quadrant can’t contain a closer node.\n    if (!(node = q.node)\n        || (x1 = q.x0) > x3\n        || (y1 = q.y0) > y3\n        || (x2 = q.x1) < x0\n        || (y2 = q.y1) < y0) continue;\n\n    // Bisect the current quadrant.\n    if (node.length) {\n      var xm = (x1 + x2) / 2,\n          ym = (y1 + y2) / 2;\n\n      quads.push(\n        new Quad(node[3], xm, ym, x2, y2),\n        new Quad(node[2], x1, ym, xm, y2),\n        new Quad(node[1], xm, y1, x2, ym),\n        new Quad(node[0], x1, y1, xm, ym)\n      );\n\n      // Visit the closest quadrant first.\n      if (i = (y >= ym) << 1 | (x >= xm)) {\n        q = quads[quads.length - 1];\n        quads[quads.length - 1] = quads[quads.length - 1 - i];\n        quads[quads.length - 1 - i] = q;\n      }\n    }\n\n    // Visit this point. (Visiting coincident points isn’t necessary!)\n    else {\n      var dx = x - +this._x.call(null, node.data),\n          dy = y - +this._y.call(null, node.data),\n          d2 = dx * dx + dy * dy;\n      if (d2 < radius) {\n        var d = Math.sqrt(radius = d2);\n        x0 = x - d, y0 = y - d;\n        x3 = x + d, y3 = y + d;\n        data = node.data;\n      }\n    }\n  }\n\n  return data;\n}\n\nfunction tree_remove(d) {\n  if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points\n\n  var parent,\n      node = this._root,\n      retainer,\n      previous,\n      next,\n      x0 = this._x0,\n      y0 = this._y0,\n      x1 = this._x1,\n      y1 = this._y1,\n      x,\n      y,\n      xm,\n      ym,\n      right,\n      bottom,\n      i,\n      j;\n\n  // If the tree is empty, initialize the root as a leaf.\n  if (!node) return this;\n\n  // Find the leaf node for the point.\n  // While descending, also retain the deepest parent with a non-removed sibling.\n  if (node.length) while (true) {\n    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;\n    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;\n    if (!(parent = node, node = node[i = bottom << 1 | right])) return this;\n    if (!node.length) break;\n    if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i;\n  }\n\n  // Find the point to remove.\n  while (node.data !== d) if (!(previous = node, node = node.next)) return this;\n  if (next = node.next) delete node.next;\n\n  // If there are multiple coincident points, remove just the point.\n  if (previous) return (next ? previous.next = next : delete previous.next), this;\n\n  // If this is the root point, remove it.\n  if (!parent) return this._root = next, this;\n\n  // Remove this leaf.\n  next ? parent[i] = next : delete parent[i];\n\n  // If the parent now contains exactly one leaf, collapse superfluous parents.\n  if ((node = parent[0] || parent[1] || parent[2] || parent[3])\n      && node === (parent[3] || parent[2] || parent[1] || parent[0])\n      && !node.length) {\n    if (retainer) retainer[j] = node;\n    else this._root = node;\n  }\n\n  return this;\n}\n\nfunction removeAll(data) {\n  for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);\n  return this;\n}\n\nfunction tree_root() {\n  return this._root;\n}\n\nfunction tree_size() {\n  var size = 0;\n  this.visit(function(node) {\n    if (!node.length) do ++size; while (node = node.next)\n  });\n  return size;\n}\n\nfunction tree_visit(callback) {\n  var quads = [], q, node = this._root, child, x0, y0, x1, y1;\n  if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1));\n  while (q = quads.pop()) {\n    if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) {\n      var xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;\n      if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));\n      if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));\n      if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));\n      if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));\n    }\n  }\n  return this;\n}\n\nfunction tree_visitAfter(callback) {\n  var quads = [], next = [], q;\n  if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));\n  while (q = quads.pop()) {\n    var node = q.node;\n    if (node.length) {\n      var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;\n      if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));\n      if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));\n      if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));\n      if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));\n    }\n    next.push(q);\n  }\n  while (q = next.pop()) {\n    callback(q.node, q.x0, q.y0, q.x1, q.y1);\n  }\n  return this;\n}\n\nfunction defaultX$1(d) {\n  return d[0];\n}\n\nfunction tree_x(_) {\n  return arguments.length ? (this._x = _, this) : this._x;\n}\n\nfunction defaultY$1(d) {\n  return d[1];\n}\n\nfunction tree_y(_) {\n  return arguments.length ? (this._y = _, this) : this._y;\n}\n\nfunction quadtree(nodes, x, y) {\n  var tree = new Quadtree(x == null ? defaultX$1 : x, y == null ? defaultY$1 : y, NaN, NaN, NaN, NaN);\n  return nodes == null ? tree : tree.addAll(nodes);\n}\n\nfunction Quadtree(x, y, x0, y0, x1, y1) {\n  this._x = x;\n  this._y = y;\n  this._x0 = x0;\n  this._y0 = y0;\n  this._x1 = x1;\n  this._y1 = y1;\n  this._root = undefined;\n}\n\nfunction leaf_copy(leaf) {\n  var copy = {data: leaf.data}, next = copy;\n  while (leaf = leaf.next) next = next.next = {data: leaf.data};\n  return copy;\n}\n\nvar treeProto = quadtree.prototype = Quadtree.prototype;\n\ntreeProto.copy = function() {\n  var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1),\n      node = this._root,\n      nodes,\n      child;\n\n  if (!node) return copy;\n\n  if (!node.length) return copy._root = leaf_copy(node), copy;\n\n  nodes = [{source: node, target: copy._root = new Array(4)}];\n  while (node = nodes.pop()) {\n    for (var i = 0; i < 4; ++i) {\n      if (child = node.source[i]) {\n        if (child.length) nodes.push({source: child, target: node.target[i] = new Array(4)});\n        else node.target[i] = leaf_copy(child);\n      }\n    }\n  }\n\n  return copy;\n};\n\ntreeProto.add = tree_add;\ntreeProto.addAll = addAll;\ntreeProto.cover = tree_cover;\ntreeProto.data = tree_data;\ntreeProto.extent = tree_extent;\ntreeProto.find = tree_find;\ntreeProto.remove = tree_remove;\ntreeProto.removeAll = removeAll;\ntreeProto.root = tree_root;\ntreeProto.size = tree_size;\ntreeProto.visit = tree_visit;\ntreeProto.visitAfter = tree_visitAfter;\ntreeProto.x = tree_x;\ntreeProto.y = tree_y;\n\nfunction x(d) {\n  return d.x + d.vx;\n}\n\nfunction y(d) {\n  return d.y + d.vy;\n}\n\nfunction collide(radius) {\n  var nodes,\n      radii,\n      strength = 1,\n      iterations = 1;\n\n  if (typeof radius !== \"function\") radius = constant$7(radius == null ? 1 : +radius);\n\n  function force() {\n    var i, n = nodes.length,\n        tree,\n        node,\n        xi,\n        yi,\n        ri,\n        ri2;\n\n    for (var k = 0; k < iterations; ++k) {\n      tree = quadtree(nodes, x, y).visitAfter(prepare);\n      for (i = 0; i < n; ++i) {\n        node = nodes[i];\n        ri = radii[node.index], ri2 = ri * ri;\n        xi = node.x + node.vx;\n        yi = node.y + node.vy;\n        tree.visit(apply);\n      }\n    }\n\n    function apply(quad, x0, y0, x1, y1) {\n      var data = quad.data, rj = quad.r, r = ri + rj;\n      if (data) {\n        if (data.index > node.index) {\n          var x = xi - data.x - data.vx,\n              y = yi - data.y - data.vy,\n              l = x * x + y * y;\n          if (l < r * r) {\n            if (x === 0) x = jiggle(), l += x * x;\n            if (y === 0) y = jiggle(), l += y * y;\n            l = (r - (l = Math.sqrt(l))) / l * strength;\n            node.vx += (x *= l) * (r = (rj *= rj) / (ri2 + rj));\n            node.vy += (y *= l) * r;\n            data.vx -= x * (r = 1 - r);\n            data.vy -= y * r;\n          }\n        }\n        return;\n      }\n      return x0 > xi + r || x1 < xi - r || y0 > yi + r || y1 < yi - r;\n    }\n  }\n\n  function prepare(quad) {\n    if (quad.data) return quad.r = radii[quad.data.index];\n    for (var i = quad.r = 0; i < 4; ++i) {\n      if (quad[i] && quad[i].r > quad.r) {\n        quad.r = quad[i].r;\n      }\n    }\n  }\n\n  function initialize() {\n    if (!nodes) return;\n    var i, n = nodes.length, node;\n    radii = new Array(n);\n    for (i = 0; i < n; ++i) node = nodes[i], radii[node.index] = +radius(node, i, nodes);\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.iterations = function(_) {\n    return arguments.length ? (iterations = +_, force) : iterations;\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = +_, force) : strength;\n  };\n\n  force.radius = function(_) {\n    return arguments.length ? (radius = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : radius;\n  };\n\n  return force;\n}\n\nfunction index(d) {\n  return d.index;\n}\n\nfunction find(nodeById, nodeId) {\n  var node = nodeById.get(nodeId);\n  if (!node) throw new Error(\"missing: \" + nodeId);\n  return node;\n}\n\nfunction link(links) {\n  var id = index,\n      strength = defaultStrength,\n      strengths,\n      distance = constant$7(30),\n      distances,\n      nodes,\n      count,\n      bias,\n      iterations = 1;\n\n  if (links == null) links = [];\n\n  function defaultStrength(link) {\n    return 1 / Math.min(count[link.source.index], count[link.target.index]);\n  }\n\n  function force(alpha) {\n    for (var k = 0, n = links.length; k < iterations; ++k) {\n      for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) {\n        link = links[i], source = link.source, target = link.target;\n        x = target.x + target.vx - source.x - source.vx || jiggle();\n        y = target.y + target.vy - source.y - source.vy || jiggle();\n        l = Math.sqrt(x * x + y * y);\n        l = (l - distances[i]) / l * alpha * strengths[i];\n        x *= l, y *= l;\n        target.vx -= x * (b = bias[i]);\n        target.vy -= y * b;\n        source.vx += x * (b = 1 - b);\n        source.vy += y * b;\n      }\n    }\n  }\n\n  function initialize() {\n    if (!nodes) return;\n\n    var i,\n        n = nodes.length,\n        m = links.length,\n        nodeById = map$1(nodes, id),\n        link;\n\n    for (i = 0, count = new Array(n); i < m; ++i) {\n      link = links[i], link.index = i;\n      if (typeof link.source !== \"object\") link.source = find(nodeById, link.source);\n      if (typeof link.target !== \"object\") link.target = find(nodeById, link.target);\n      count[link.source.index] = (count[link.source.index] || 0) + 1;\n      count[link.target.index] = (count[link.target.index] || 0) + 1;\n    }\n\n    for (i = 0, bias = new Array(m); i < m; ++i) {\n      link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]);\n    }\n\n    strengths = new Array(m), initializeStrength();\n    distances = new Array(m), initializeDistance();\n  }\n\n  function initializeStrength() {\n    if (!nodes) return;\n\n    for (var i = 0, n = links.length; i < n; ++i) {\n      strengths[i] = +strength(links[i], i, links);\n    }\n  }\n\n  function initializeDistance() {\n    if (!nodes) return;\n\n    for (var i = 0, n = links.length; i < n; ++i) {\n      distances[i] = +distance(links[i], i, links);\n    }\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.links = function(_) {\n    return arguments.length ? (links = _, initialize(), force) : links;\n  };\n\n  force.id = function(_) {\n    return arguments.length ? (id = _, force) : id;\n  };\n\n  force.iterations = function(_) {\n    return arguments.length ? (iterations = +_, force) : iterations;\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = typeof _ === \"function\" ? _ : constant$7(+_), initializeStrength(), force) : strength;\n  };\n\n  force.distance = function(_) {\n    return arguments.length ? (distance = typeof _ === \"function\" ? _ : constant$7(+_), initializeDistance(), force) : distance;\n  };\n\n  return force;\n}\n\nfunction x$1(d) {\n  return d.x;\n}\n\nfunction y$1(d) {\n  return d.y;\n}\n\nvar initialRadius = 10,\n    initialAngle = Math.PI * (3 - Math.sqrt(5));\n\nfunction simulation(nodes) {\n  var simulation,\n      alpha = 1,\n      alphaMin = 0.001,\n      alphaDecay = 1 - Math.pow(alphaMin, 1 / 300),\n      alphaTarget = 0,\n      velocityDecay = 0.6,\n      forces = map$1(),\n      stepper = timer(step),\n      event = dispatch(\"tick\", \"end\");\n\n  if (nodes == null) nodes = [];\n\n  function step() {\n    tick();\n    event.call(\"tick\", simulation);\n    if (alpha < alphaMin) {\n      stepper.stop();\n      event.call(\"end\", simulation);\n    }\n  }\n\n  function tick(iterations) {\n    var i, n = nodes.length, node;\n\n    if (iterations === undefined) iterations = 1;\n\n    for (var k = 0; k < iterations; ++k) {\n      alpha += (alphaTarget - alpha) * alphaDecay;\n\n      forces.each(function (force) {\n        force(alpha);\n      });\n\n      for (i = 0; i < n; ++i) {\n        node = nodes[i];\n        if (node.fx == null) node.x += node.vx *= velocityDecay;\n        else node.x = node.fx, node.vx = 0;\n        if (node.fy == null) node.y += node.vy *= velocityDecay;\n        else node.y = node.fy, node.vy = 0;\n      }\n    }\n\n    return simulation;\n  }\n\n  function initializeNodes() {\n    for (var i = 0, n = nodes.length, node; i < n; ++i) {\n      node = nodes[i], node.index = i;\n      if (node.fx != null) node.x = node.fx;\n      if (node.fy != null) node.y = node.fy;\n      if (isNaN(node.x) || isNaN(node.y)) {\n        var radius = initialRadius * Math.sqrt(i), angle = i * initialAngle;\n        node.x = radius * Math.cos(angle);\n        node.y = radius * Math.sin(angle);\n      }\n      if (isNaN(node.vx) || isNaN(node.vy)) {\n        node.vx = node.vy = 0;\n      }\n    }\n  }\n\n  function initializeForce(force) {\n    if (force.initialize) force.initialize(nodes);\n    return force;\n  }\n\n  initializeNodes();\n\n  return simulation = {\n    tick: tick,\n\n    restart: function() {\n      return stepper.restart(step), simulation;\n    },\n\n    stop: function() {\n      return stepper.stop(), simulation;\n    },\n\n    nodes: function(_) {\n      return arguments.length ? (nodes = _, initializeNodes(), forces.each(initializeForce), simulation) : nodes;\n    },\n\n    alpha: function(_) {\n      return arguments.length ? (alpha = +_, simulation) : alpha;\n    },\n\n    alphaMin: function(_) {\n      return arguments.length ? (alphaMin = +_, simulation) : alphaMin;\n    },\n\n    alphaDecay: function(_) {\n      return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay;\n    },\n\n    alphaTarget: function(_) {\n      return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget;\n    },\n\n    velocityDecay: function(_) {\n      return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay;\n    },\n\n    force: function(name, _) {\n      return arguments.length > 1 ? ((_ == null ? forces.remove(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name);\n    },\n\n    find: function(x, y, radius) {\n      var i = 0,\n          n = nodes.length,\n          dx,\n          dy,\n          d2,\n          node,\n          closest;\n\n      if (radius == null) radius = Infinity;\n      else radius *= radius;\n\n      for (i = 0; i < n; ++i) {\n        node = nodes[i];\n        dx = x - node.x;\n        dy = y - node.y;\n        d2 = dx * dx + dy * dy;\n        if (d2 < radius) closest = node, radius = d2;\n      }\n\n      return closest;\n    },\n\n    on: function(name, _) {\n      return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);\n    }\n  };\n}\n\nfunction manyBody() {\n  var nodes,\n      node,\n      alpha,\n      strength = constant$7(-30),\n      strengths,\n      distanceMin2 = 1,\n      distanceMax2 = Infinity,\n      theta2 = 0.81;\n\n  function force(_) {\n    var i, n = nodes.length, tree = quadtree(nodes, x$1, y$1).visitAfter(accumulate);\n    for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply);\n  }\n\n  function initialize() {\n    if (!nodes) return;\n    var i, n = nodes.length, node;\n    strengths = new Array(n);\n    for (i = 0; i < n; ++i) node = nodes[i], strengths[node.index] = +strength(node, i, nodes);\n  }\n\n  function accumulate(quad) {\n    var strength = 0, q, c, weight = 0, x, y, i;\n\n    // For internal nodes, accumulate forces from child quadrants.\n    if (quad.length) {\n      for (x = y = i = 0; i < 4; ++i) {\n        if ((q = quad[i]) && (c = Math.abs(q.value))) {\n          strength += q.value, weight += c, x += c * q.x, y += c * q.y;\n        }\n      }\n      quad.x = x / weight;\n      quad.y = y / weight;\n    }\n\n    // For leaf nodes, accumulate forces from coincident quadrants.\n    else {\n      q = quad;\n      q.x = q.data.x;\n      q.y = q.data.y;\n      do strength += strengths[q.data.index];\n      while (q = q.next);\n    }\n\n    quad.value = strength;\n  }\n\n  function apply(quad, x1, _, x2) {\n    if (!quad.value) return true;\n\n    var x = quad.x - node.x,\n        y = quad.y - node.y,\n        w = x2 - x1,\n        l = x * x + y * y;\n\n    // Apply the Barnes-Hut approximation if possible.\n    // Limit forces for very close nodes; randomize direction if coincident.\n    if (w * w / theta2 < l) {\n      if (l < distanceMax2) {\n        if (x === 0) x = jiggle(), l += x * x;\n        if (y === 0) y = jiggle(), l += y * y;\n        if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);\n        node.vx += x * quad.value * alpha / l;\n        node.vy += y * quad.value * alpha / l;\n      }\n      return true;\n    }\n\n    // Otherwise, process points directly.\n    else if (quad.length || l >= distanceMax2) return;\n\n    // Limit forces for very close nodes; randomize direction if coincident.\n    if (quad.data !== node || quad.next) {\n      if (x === 0) x = jiggle(), l += x * x;\n      if (y === 0) y = jiggle(), l += y * y;\n      if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);\n    }\n\n    do if (quad.data !== node) {\n      w = strengths[quad.data.index] * alpha / l;\n      node.vx += x * w;\n      node.vy += y * w;\n    } while (quad = quad.next);\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : strength;\n  };\n\n  force.distanceMin = function(_) {\n    return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2);\n  };\n\n  force.distanceMax = function(_) {\n    return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2);\n  };\n\n  force.theta = function(_) {\n    return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2);\n  };\n\n  return force;\n}\n\nfunction radial(radius, x, y) {\n  var nodes,\n      strength = constant$7(0.1),\n      strengths,\n      radiuses;\n\n  if (typeof radius !== \"function\") radius = constant$7(+radius);\n  if (x == null) x = 0;\n  if (y == null) y = 0;\n\n  function force(alpha) {\n    for (var i = 0, n = nodes.length; i < n; ++i) {\n      var node = nodes[i],\n          dx = node.x - x || 1e-6,\n          dy = node.y - y || 1e-6,\n          r = Math.sqrt(dx * dx + dy * dy),\n          k = (radiuses[i] - r) * strengths[i] * alpha / r;\n      node.vx += dx * k;\n      node.vy += dy * k;\n    }\n  }\n\n  function initialize() {\n    if (!nodes) return;\n    var i, n = nodes.length;\n    strengths = new Array(n);\n    radiuses = new Array(n);\n    for (i = 0; i < n; ++i) {\n      radiuses[i] = +radius(nodes[i], i, nodes);\n      strengths[i] = isNaN(radiuses[i]) ? 0 : +strength(nodes[i], i, nodes);\n    }\n  }\n\n  force.initialize = function(_) {\n    nodes = _, initialize();\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : strength;\n  };\n\n  force.radius = function(_) {\n    return arguments.length ? (radius = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : radius;\n  };\n\n  force.x = function(_) {\n    return arguments.length ? (x = +_, force) : x;\n  };\n\n  force.y = function(_) {\n    return arguments.length ? (y = +_, force) : y;\n  };\n\n  return force;\n}\n\nfunction x$2(x) {\n  var strength = constant$7(0.1),\n      nodes,\n      strengths,\n      xz;\n\n  if (typeof x !== \"function\") x = constant$7(x == null ? 0 : +x);\n\n  function force(alpha) {\n    for (var i = 0, n = nodes.length, node; i < n; ++i) {\n      node = nodes[i], node.vx += (xz[i] - node.x) * strengths[i] * alpha;\n    }\n  }\n\n  function initialize() {\n    if (!nodes) return;\n    var i, n = nodes.length;\n    strengths = new Array(n);\n    xz = new Array(n);\n    for (i = 0; i < n; ++i) {\n      strengths[i] = isNaN(xz[i] = +x(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);\n    }\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : strength;\n  };\n\n  force.x = function(_) {\n    return arguments.length ? (x = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : x;\n  };\n\n  return force;\n}\n\nfunction y$2(y) {\n  var strength = constant$7(0.1),\n      nodes,\n      strengths,\n      yz;\n\n  if (typeof y !== \"function\") y = constant$7(y == null ? 0 : +y);\n\n  function force(alpha) {\n    for (var i = 0, n = nodes.length, node; i < n; ++i) {\n      node = nodes[i], node.vy += (yz[i] - node.y) * strengths[i] * alpha;\n    }\n  }\n\n  function initialize() {\n    if (!nodes) return;\n    var i, n = nodes.length;\n    strengths = new Array(n);\n    yz = new Array(n);\n    for (i = 0; i < n; ++i) {\n      strengths[i] = isNaN(yz[i] = +y(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);\n    }\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : strength;\n  };\n\n  force.y = function(_) {\n    return arguments.length ? (y = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : y;\n  };\n\n  return force;\n}\n\n// Computes the decimal coefficient and exponent of the specified number x with\n// significant digits p, where x is positive and p is in [1, 21] or undefined.\n// For example, formatDecimal(1.23) returns [\"123\", 0].\nfunction formatDecimal(x, p) {\n  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf(\"e\")) < 0) return null; // NaN, ±Infinity\n  var i, coefficient = x.slice(0, i);\n\n  // The string returned by toExponential either has the form \\d\\.\\d+e[-+]\\d+\n  // (e.g., 1.2e+3) or the form \\de[-+]\\d+ (e.g., 1e+3).\n  return [\n    coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,\n    +x.slice(i + 1)\n  ];\n}\n\nfunction exponent$1(x) {\n  return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;\n}\n\nfunction formatGroup(grouping, thousands) {\n  return function(value, width) {\n    var i = value.length,\n        t = [],\n        j = 0,\n        g = grouping[0],\n        length = 0;\n\n    while (i > 0 && g > 0) {\n      if (length + g + 1 > width) g = Math.max(1, width - length);\n      t.push(value.substring(i -= g, i + g));\n      if ((length += g + 1) > width) break;\n      g = grouping[j = (j + 1) % grouping.length];\n    }\n\n    return t.reverse().join(thousands);\n  };\n}\n\nfunction formatNumerals(numerals) {\n  return function(value) {\n    return value.replace(/[0-9]/g, function(i) {\n      return numerals[+i];\n    });\n  };\n}\n\n// [[fill]align][sign][symbol][0][width][,][.precision][~][type]\nvar re = /^(?:(.)?([<>=^]))?([+\\-( ])?([$#])?(0)?(\\d+)?(,)?(\\.\\d+)?(~)?([a-z%])?$/i;\n\nfunction formatSpecifier(specifier) {\n  if (!(match = re.exec(specifier))) throw new Error(\"invalid format: \" + specifier);\n  var match;\n  return new FormatSpecifier({\n    fill: match[1],\n    align: match[2],\n    sign: match[3],\n    symbol: match[4],\n    zero: match[5],\n    width: match[6],\n    comma: match[7],\n    precision: match[8] && match[8].slice(1),\n    trim: match[9],\n    type: match[10]\n  });\n}\n\nformatSpecifier.prototype = FormatSpecifier.prototype; // instanceof\n\nfunction FormatSpecifier(specifier) {\n  this.fill = specifier.fill === undefined ? \" \" : specifier.fill + \"\";\n  this.align = specifier.align === undefined ? \">\" : specifier.align + \"\";\n  this.sign = specifier.sign === undefined ? \"-\" : specifier.sign + \"\";\n  this.symbol = specifier.symbol === undefined ? \"\" : specifier.symbol + \"\";\n  this.zero = !!specifier.zero;\n  this.width = specifier.width === undefined ? undefined : +specifier.width;\n  this.comma = !!specifier.comma;\n  this.precision = specifier.precision === undefined ? undefined : +specifier.precision;\n  this.trim = !!specifier.trim;\n  this.type = specifier.type === undefined ? \"\" : specifier.type + \"\";\n}\n\nFormatSpecifier.prototype.toString = function() {\n  return this.fill\n      + this.align\n      + this.sign\n      + this.symbol\n      + (this.zero ? \"0\" : \"\")\n      + (this.width === undefined ? \"\" : Math.max(1, this.width | 0))\n      + (this.comma ? \",\" : \"\")\n      + (this.precision === undefined ? \"\" : \".\" + Math.max(0, this.precision | 0))\n      + (this.trim ? \"~\" : \"\")\n      + this.type;\n};\n\n// Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.\nfunction formatTrim(s) {\n  out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {\n    switch (s[i]) {\n      case \".\": i0 = i1 = i; break;\n      case \"0\": if (i0 === 0) i0 = i; i1 = i; break;\n      default: if (!+s[i]) break out; if (i0 > 0) i0 = 0; break;\n    }\n  }\n  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;\n}\n\nvar prefixExponent;\n\nfunction formatPrefixAuto(x, p) {\n  var d = formatDecimal(x, p);\n  if (!d) return x + \"\";\n  var coefficient = d[0],\n      exponent = d[1],\n      i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,\n      n = coefficient.length;\n  return i === n ? coefficient\n      : i > n ? coefficient + new Array(i - n + 1).join(\"0\")\n      : i > 0 ? coefficient.slice(0, i) + \".\" + coefficient.slice(i)\n      : \"0.\" + new Array(1 - i).join(\"0\") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!\n}\n\nfunction formatRounded(x, p) {\n  var d = formatDecimal(x, p);\n  if (!d) return x + \"\";\n  var coefficient = d[0],\n      exponent = d[1];\n  return exponent < 0 ? \"0.\" + new Array(-exponent).join(\"0\") + coefficient\n      : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + \".\" + coefficient.slice(exponent + 1)\n      : coefficient + new Array(exponent - coefficient.length + 2).join(\"0\");\n}\n\nvar formatTypes = {\n  \"%\": function(x, p) { return (x * 100).toFixed(p); },\n  \"b\": function(x) { return Math.round(x).toString(2); },\n  \"c\": function(x) { return x + \"\"; },\n  \"d\": function(x) { return Math.round(x).toString(10); },\n  \"e\": function(x, p) { return x.toExponential(p); },\n  \"f\": function(x, p) { return x.toFixed(p); },\n  \"g\": function(x, p) { return x.toPrecision(p); },\n  \"o\": function(x) { return Math.round(x).toString(8); },\n  \"p\": function(x, p) { return formatRounded(x * 100, p); },\n  \"r\": formatRounded,\n  \"s\": formatPrefixAuto,\n  \"X\": function(x) { return Math.round(x).toString(16).toUpperCase(); },\n  \"x\": function(x) { return Math.round(x).toString(16); }\n};\n\nfunction identity$3(x) {\n  return x;\n}\n\nvar map$2 = Array.prototype.map,\n    prefixes = [\"y\",\"z\",\"a\",\"f\",\"p\",\"n\",\"\\xB5\",\"m\",\"\",\"k\",\"M\",\"G\",\"T\",\"P\",\"E\",\"Z\",\"Y\"];\n\nfunction formatLocale(locale) {\n  var group = locale.grouping === undefined || locale.thousands === undefined ? identity$3 : formatGroup(map$2.call(locale.grouping, Number), locale.thousands + \"\"),\n      currencyPrefix = locale.currency === undefined ? \"\" : locale.currency[0] + \"\",\n      currencySuffix = locale.currency === undefined ? \"\" : locale.currency[1] + \"\",\n      decimal = locale.decimal === undefined ? \".\" : locale.decimal + \"\",\n      numerals = locale.numerals === undefined ? identity$3 : formatNumerals(map$2.call(locale.numerals, String)),\n      percent = locale.percent === undefined ? \"%\" : locale.percent + \"\",\n      minus = locale.minus === undefined ? \"-\" : locale.minus + \"\",\n      nan = locale.nan === undefined ? \"NaN\" : locale.nan + \"\";\n\n  function newFormat(specifier) {\n    specifier = formatSpecifier(specifier);\n\n    var fill = specifier.fill,\n        align = specifier.align,\n        sign = specifier.sign,\n        symbol = specifier.symbol,\n        zero = specifier.zero,\n        width = specifier.width,\n        comma = specifier.comma,\n        precision = specifier.precision,\n        trim = specifier.trim,\n        type = specifier.type;\n\n    // The \"n\" type is an alias for \",g\".\n    if (type === \"n\") comma = true, type = \"g\";\n\n    // The \"\" type, and any invalid type, is an alias for \".12~g\".\n    else if (!formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = \"g\";\n\n    // If zero fill is specified, padding goes after sign and before digits.\n    if (zero || (fill === \"0\" && align === \"=\")) zero = true, fill = \"0\", align = \"=\";\n\n    // Compute the prefix and suffix.\n    // For SI-prefix, the suffix is lazily computed.\n    var prefix = symbol === \"$\" ? currencyPrefix : symbol === \"#\" && /[boxX]/.test(type) ? \"0\" + type.toLowerCase() : \"\",\n        suffix = symbol === \"$\" ? currencySuffix : /[%p]/.test(type) ? percent : \"\";\n\n    // What format function should we use?\n    // Is this an integer type?\n    // Can this type generate exponential notation?\n    var formatType = formatTypes[type],\n        maybeSuffix = /[defgprs%]/.test(type);\n\n    // Set the default precision if not specified,\n    // or clamp the specified precision to the supported range.\n    // For significant precision, it must be in [1, 21].\n    // For fixed precision, it must be in [0, 20].\n    precision = precision === undefined ? 6\n        : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))\n        : Math.max(0, Math.min(20, precision));\n\n    function format(value) {\n      var valuePrefix = prefix,\n          valueSuffix = suffix,\n          i, n, c;\n\n      if (type === \"c\") {\n        valueSuffix = formatType(value) + valueSuffix;\n        value = \"\";\n      } else {\n        value = +value;\n\n        // Determine the sign. -0 is not less than 0, but 1 / -0 is!\n        var valueNegative = value < 0 || 1 / value < 0;\n\n        // Perform the initial formatting.\n        value = isNaN(value) ? nan : formatType(Math.abs(value), precision);\n\n        // Trim insignificant zeros.\n        if (trim) value = formatTrim(value);\n\n        // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.\n        if (valueNegative && +value === 0 && sign !== \"+\") valueNegative = false;\n\n        // Compute the prefix and suffix.\n        valuePrefix = (valueNegative ? (sign === \"(\" ? sign : minus) : sign === \"-\" || sign === \"(\" ? \"\" : sign) + valuePrefix;\n        valueSuffix = (type === \"s\" ? prefixes[8 + prefixExponent / 3] : \"\") + valueSuffix + (valueNegative && sign === \"(\" ? \")\" : \"\");\n\n        // Break the formatted value into the integer “value” part that can be\n        // grouped, and fractional or exponential “suffix” part that is not.\n        if (maybeSuffix) {\n          i = -1, n = value.length;\n          while (++i < n) {\n            if (c = value.charCodeAt(i), 48 > c || c > 57) {\n              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;\n              value = value.slice(0, i);\n              break;\n            }\n          }\n        }\n      }\n\n      // If the fill character is not \"0\", grouping is applied before padding.\n      if (comma && !zero) value = group(value, Infinity);\n\n      // Compute the padding.\n      var length = valuePrefix.length + value.length + valueSuffix.length,\n          padding = length < width ? new Array(width - length + 1).join(fill) : \"\";\n\n      // If the fill character is \"0\", grouping is applied after padding.\n      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = \"\";\n\n      // Reconstruct the final output based on the desired alignment.\n      switch (align) {\n        case \"<\": value = valuePrefix + value + valueSuffix + padding; break;\n        case \"=\": value = valuePrefix + padding + value + valueSuffix; break;\n        case \"^\": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;\n        default: value = padding + valuePrefix + value + valueSuffix; break;\n      }\n\n      return numerals(value);\n    }\n\n    format.toString = function() {\n      return specifier + \"\";\n    };\n\n    return format;\n  }\n\n  function formatPrefix(specifier, value) {\n    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = \"f\", specifier)),\n        e = Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3,\n        k = Math.pow(10, -e),\n        prefix = prefixes[8 + e / 3];\n    return function(value) {\n      return f(k * value) + prefix;\n    };\n  }\n\n  return {\n    format: newFormat,\n    formatPrefix: formatPrefix\n  };\n}\n\nvar locale;\n\ndefaultLocale({\n  decimal: \".\",\n  thousands: \",\",\n  grouping: [3],\n  currency: [\"$\", \"\"],\n  minus: \"-\"\n});\n\nfunction defaultLocale(definition) {\n  locale = formatLocale(definition);\n  exports.format = locale.format;\n  exports.formatPrefix = locale.formatPrefix;\n  return locale;\n}\n\nfunction precisionFixed(step) {\n  return Math.max(0, -exponent$1(Math.abs(step)));\n}\n\nfunction precisionPrefix(step, value) {\n  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3 - exponent$1(Math.abs(step)));\n}\n\nfunction precisionRound(step, max) {\n  step = Math.abs(step), max = Math.abs(max) - step;\n  return Math.max(0, exponent$1(max) - exponent$1(step)) + 1;\n}\n\n// Adds floating point numbers with twice the normal precision.\n// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and\n// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)\n// 305–363 (1997).\n// Code adapted from GeographicLib by Charles F. F. Karney,\n// http://geographiclib.sourceforge.net/\n\nfunction adder() {\n  return new Adder;\n}\n\nfunction Adder() {\n  this.reset();\n}\n\nAdder.prototype = {\n  constructor: Adder,\n  reset: function() {\n    this.s = // rounded value\n    this.t = 0; // exact error\n  },\n  add: function(y) {\n    add$1(temp, y, this.t);\n    add$1(this, temp.s, this.s);\n    if (this.s) this.t += temp.t;\n    else this.s = temp.t;\n  },\n  valueOf: function() {\n    return this.s;\n  }\n};\n\nvar temp = new Adder;\n\nfunction add$1(adder, a, b) {\n  var x = adder.s = a + b,\n      bv = x - a,\n      av = x - bv;\n  adder.t = (a - av) + (b - bv);\n}\n\nvar epsilon$2 = 1e-6;\nvar epsilon2$1 = 1e-12;\nvar pi$3 = Math.PI;\nvar halfPi$2 = pi$3 / 2;\nvar quarterPi = pi$3 / 4;\nvar tau$3 = pi$3 * 2;\n\nvar degrees$1 = 180 / pi$3;\nvar radians = pi$3 / 180;\n\nvar abs = Math.abs;\nvar atan = Math.atan;\nvar atan2 = Math.atan2;\nvar cos$1 = Math.cos;\nvar ceil = Math.ceil;\nvar exp = Math.exp;\nvar log = Math.log;\nvar pow = Math.pow;\nvar sin$1 = Math.sin;\nvar sign = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };\nvar sqrt = Math.sqrt;\nvar tan = Math.tan;\n\nfunction acos(x) {\n  return x > 1 ? 0 : x < -1 ? pi$3 : Math.acos(x);\n}\n\nfunction asin(x) {\n  return x > 1 ? halfPi$2 : x < -1 ? -halfPi$2 : Math.asin(x);\n}\n\nfunction haversin(x) {\n  return (x = sin$1(x / 2)) * x;\n}\n\nfunction noop$2() {}\n\nfunction streamGeometry(geometry, stream) {\n  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {\n    streamGeometryType[geometry.type](geometry, stream);\n  }\n}\n\nvar streamObjectType = {\n  Feature: function(object, stream) {\n    streamGeometry(object.geometry, stream);\n  },\n  FeatureCollection: function(object, stream) {\n    var features = object.features, i = -1, n = features.length;\n    while (++i < n) streamGeometry(features[i].geometry, stream);\n  }\n};\n\nvar streamGeometryType = {\n  Sphere: function(object, stream) {\n    stream.sphere();\n  },\n  Point: function(object, stream) {\n    object = object.coordinates;\n    stream.point(object[0], object[1], object[2]);\n  },\n  MultiPoint: function(object, stream) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]);\n  },\n  LineString: function(object, stream) {\n    streamLine(object.coordinates, stream, 0);\n  },\n  MultiLineString: function(object, stream) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) streamLine(coordinates[i], stream, 0);\n  },\n  Polygon: function(object, stream) {\n    streamPolygon(object.coordinates, stream);\n  },\n  MultiPolygon: function(object, stream) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) streamPolygon(coordinates[i], stream);\n  },\n  GeometryCollection: function(object, stream) {\n    var geometries = object.geometries, i = -1, n = geometries.length;\n    while (++i < n) streamGeometry(geometries[i], stream);\n  }\n};\n\nfunction streamLine(coordinates, stream, closed) {\n  var i = -1, n = coordinates.length - closed, coordinate;\n  stream.lineStart();\n  while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);\n  stream.lineEnd();\n}\n\nfunction streamPolygon(coordinates, stream) {\n  var i = -1, n = coordinates.length;\n  stream.polygonStart();\n  while (++i < n) streamLine(coordinates[i], stream, 1);\n  stream.polygonEnd();\n}\n\nfunction geoStream(object, stream) {\n  if (object && streamObjectType.hasOwnProperty(object.type)) {\n    streamObjectType[object.type](object, stream);\n  } else {\n    streamGeometry(object, stream);\n  }\n}\n\nvar areaRingSum = adder();\n\nvar areaSum = adder(),\n    lambda00,\n    phi00,\n    lambda0,\n    cosPhi0,\n    sinPhi0;\n\nvar areaStream = {\n  point: noop$2,\n  lineStart: noop$2,\n  lineEnd: noop$2,\n  polygonStart: function() {\n    areaRingSum.reset();\n    areaStream.lineStart = areaRingStart;\n    areaStream.lineEnd = areaRingEnd;\n  },\n  polygonEnd: function() {\n    var areaRing = +areaRingSum;\n    areaSum.add(areaRing < 0 ? tau$3 + areaRing : areaRing);\n    this.lineStart = this.lineEnd = this.point = noop$2;\n  },\n  sphere: function() {\n    areaSum.add(tau$3);\n  }\n};\n\nfunction areaRingStart() {\n  areaStream.point = areaPointFirst;\n}\n\nfunction areaRingEnd() {\n  areaPoint(lambda00, phi00);\n}\n\nfunction areaPointFirst(lambda, phi) {\n  areaStream.point = areaPoint;\n  lambda00 = lambda, phi00 = phi;\n  lambda *= radians, phi *= radians;\n  lambda0 = lambda, cosPhi0 = cos$1(phi = phi / 2 + quarterPi), sinPhi0 = sin$1(phi);\n}\n\nfunction areaPoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  phi = phi / 2 + quarterPi; // half the angular distance from south pole\n\n  // Spherical excess E for a spherical triangle with vertices: south pole,\n  // previous point, current point.  Uses a formula derived from Cagnoli’s\n  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).\n  var dLambda = lambda - lambda0,\n      sdLambda = dLambda >= 0 ? 1 : -1,\n      adLambda = sdLambda * dLambda,\n      cosPhi = cos$1(phi),\n      sinPhi = sin$1(phi),\n      k = sinPhi0 * sinPhi,\n      u = cosPhi0 * cosPhi + k * cos$1(adLambda),\n      v = k * sdLambda * sin$1(adLambda);\n  areaRingSum.add(atan2(v, u));\n\n  // Advance the previous points.\n  lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;\n}\n\nfunction area$1(object) {\n  areaSum.reset();\n  geoStream(object, areaStream);\n  return areaSum * 2;\n}\n\nfunction spherical(cartesian) {\n  return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];\n}\n\nfunction cartesian(spherical) {\n  var lambda = spherical[0], phi = spherical[1], cosPhi = cos$1(phi);\n  return [cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi)];\n}\n\nfunction cartesianDot(a, b) {\n  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];\n}\n\nfunction cartesianCross(a, b) {\n  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];\n}\n\n// TODO return a\nfunction cartesianAddInPlace(a, b) {\n  a[0] += b[0], a[1] += b[1], a[2] += b[2];\n}\n\nfunction cartesianScale(vector, k) {\n  return [vector[0] * k, vector[1] * k, vector[2] * k];\n}\n\n// TODO return d\nfunction cartesianNormalizeInPlace(d) {\n  var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);\n  d[0] /= l, d[1] /= l, d[2] /= l;\n}\n\nvar lambda0$1, phi0, lambda1, phi1, // bounds\n    lambda2, // previous lambda-coordinate\n    lambda00$1, phi00$1, // first point\n    p0, // previous 3D point\n    deltaSum = adder(),\n    ranges,\n    range;\n\nvar boundsStream = {\n  point: boundsPoint,\n  lineStart: boundsLineStart,\n  lineEnd: boundsLineEnd,\n  polygonStart: function() {\n    boundsStream.point = boundsRingPoint;\n    boundsStream.lineStart = boundsRingStart;\n    boundsStream.lineEnd = boundsRingEnd;\n    deltaSum.reset();\n    areaStream.polygonStart();\n  },\n  polygonEnd: function() {\n    areaStream.polygonEnd();\n    boundsStream.point = boundsPoint;\n    boundsStream.lineStart = boundsLineStart;\n    boundsStream.lineEnd = boundsLineEnd;\n    if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);\n    else if (deltaSum > epsilon$2) phi1 = 90;\n    else if (deltaSum < -epsilon$2) phi0 = -90;\n    range[0] = lambda0$1, range[1] = lambda1;\n  },\n  sphere: function() {\n    lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);\n  }\n};\n\nfunction boundsPoint(lambda, phi) {\n  ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);\n  if (phi < phi0) phi0 = phi;\n  if (phi > phi1) phi1 = phi;\n}\n\nfunction linePoint(lambda, phi) {\n  var p = cartesian([lambda * radians, phi * radians]);\n  if (p0) {\n    var normal = cartesianCross(p0, p),\n        equatorial = [normal[1], -normal[0], 0],\n        inflection = cartesianCross(equatorial, normal);\n    cartesianNormalizeInPlace(inflection);\n    inflection = spherical(inflection);\n    var delta = lambda - lambda2,\n        sign = delta > 0 ? 1 : -1,\n        lambdai = inflection[0] * degrees$1 * sign,\n        phii,\n        antimeridian = abs(delta) > 180;\n    if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {\n      phii = inflection[1] * degrees$1;\n      if (phii > phi1) phi1 = phii;\n    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {\n      phii = -inflection[1] * degrees$1;\n      if (phii < phi0) phi0 = phii;\n    } else {\n      if (phi < phi0) phi0 = phi;\n      if (phi > phi1) phi1 = phi;\n    }\n    if (antimeridian) {\n      if (lambda < lambda2) {\n        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;\n      } else {\n        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;\n      }\n    } else {\n      if (lambda1 >= lambda0$1) {\n        if (lambda < lambda0$1) lambda0$1 = lambda;\n        if (lambda > lambda1) lambda1 = lambda;\n      } else {\n        if (lambda > lambda2) {\n          if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;\n        } else {\n          if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;\n        }\n      }\n    }\n  } else {\n    ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);\n  }\n  if (phi < phi0) phi0 = phi;\n  if (phi > phi1) phi1 = phi;\n  p0 = p, lambda2 = lambda;\n}\n\nfunction boundsLineStart() {\n  boundsStream.point = linePoint;\n}\n\nfunction boundsLineEnd() {\n  range[0] = lambda0$1, range[1] = lambda1;\n  boundsStream.point = boundsPoint;\n  p0 = null;\n}\n\nfunction boundsRingPoint(lambda, phi) {\n  if (p0) {\n    var delta = lambda - lambda2;\n    deltaSum.add(abs(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);\n  } else {\n    lambda00$1 = lambda, phi00$1 = phi;\n  }\n  areaStream.point(lambda, phi);\n  linePoint(lambda, phi);\n}\n\nfunction boundsRingStart() {\n  areaStream.lineStart();\n}\n\nfunction boundsRingEnd() {\n  boundsRingPoint(lambda00$1, phi00$1);\n  areaStream.lineEnd();\n  if (abs(deltaSum) > epsilon$2) lambda0$1 = -(lambda1 = 180);\n  range[0] = lambda0$1, range[1] = lambda1;\n  p0 = null;\n}\n\n// Finds the left-right distance between two longitudes.\n// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want\n// the distance between ±180° to be 360°.\nfunction angle(lambda0, lambda1) {\n  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;\n}\n\nfunction rangeCompare(a, b) {\n  return a[0] - b[0];\n}\n\nfunction rangeContains(range, x) {\n  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;\n}\n\nfunction bounds(feature) {\n  var i, n, a, b, merged, deltaMax, delta;\n\n  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);\n  ranges = [];\n  geoStream(feature, boundsStream);\n\n  // First, sort ranges by their minimum longitudes.\n  if (n = ranges.length) {\n    ranges.sort(rangeCompare);\n\n    // Then, merge any ranges that overlap.\n    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {\n      b = ranges[i];\n      if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {\n        if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];\n        if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];\n      } else {\n        merged.push(a = b);\n      }\n    }\n\n    // Finally, find the largest gap between the merged ranges.\n    // The final bounding box will be the inverse of this gap.\n    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {\n      b = merged[i];\n      if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];\n    }\n  }\n\n  ranges = range = null;\n\n  return lambda0$1 === Infinity || phi0 === Infinity\n      ? [[NaN, NaN], [NaN, NaN]]\n      : [[lambda0$1, phi0], [lambda1, phi1]];\n}\n\nvar W0, W1,\n    X0, Y0, Z0,\n    X1, Y1, Z1,\n    X2, Y2, Z2,\n    lambda00$2, phi00$2, // first point\n    x0, y0, z0; // previous point\n\nvar centroidStream = {\n  sphere: noop$2,\n  point: centroidPoint,\n  lineStart: centroidLineStart,\n  lineEnd: centroidLineEnd,\n  polygonStart: function() {\n    centroidStream.lineStart = centroidRingStart;\n    centroidStream.lineEnd = centroidRingEnd;\n  },\n  polygonEnd: function() {\n    centroidStream.lineStart = centroidLineStart;\n    centroidStream.lineEnd = centroidLineEnd;\n  }\n};\n\n// Arithmetic mean of Cartesian vectors.\nfunction centroidPoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var cosPhi = cos$1(phi);\n  centroidPointCartesian(cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi));\n}\n\nfunction centroidPointCartesian(x, y, z) {\n  ++W0;\n  X0 += (x - X0) / W0;\n  Y0 += (y - Y0) / W0;\n  Z0 += (z - Z0) / W0;\n}\n\nfunction centroidLineStart() {\n  centroidStream.point = centroidLinePointFirst;\n}\n\nfunction centroidLinePointFirst(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var cosPhi = cos$1(phi);\n  x0 = cosPhi * cos$1(lambda);\n  y0 = cosPhi * sin$1(lambda);\n  z0 = sin$1(phi);\n  centroidStream.point = centroidLinePoint;\n  centroidPointCartesian(x0, y0, z0);\n}\n\nfunction centroidLinePoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var cosPhi = cos$1(phi),\n      x = cosPhi * cos$1(lambda),\n      y = cosPhi * sin$1(lambda),\n      z = sin$1(phi),\n      w = atan2(sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);\n  W1 += w;\n  X1 += w * (x0 + (x0 = x));\n  Y1 += w * (y0 + (y0 = y));\n  Z1 += w * (z0 + (z0 = z));\n  centroidPointCartesian(x0, y0, z0);\n}\n\nfunction centroidLineEnd() {\n  centroidStream.point = centroidPoint;\n}\n\n// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,\n// J. Applied Mechanics 42, 239 (1975).\nfunction centroidRingStart() {\n  centroidStream.point = centroidRingPointFirst;\n}\n\nfunction centroidRingEnd() {\n  centroidRingPoint(lambda00$2, phi00$2);\n  centroidStream.point = centroidPoint;\n}\n\nfunction centroidRingPointFirst(lambda, phi) {\n  lambda00$2 = lambda, phi00$2 = phi;\n  lambda *= radians, phi *= radians;\n  centroidStream.point = centroidRingPoint;\n  var cosPhi = cos$1(phi);\n  x0 = cosPhi * cos$1(lambda);\n  y0 = cosPhi * sin$1(lambda);\n  z0 = sin$1(phi);\n  centroidPointCartesian(x0, y0, z0);\n}\n\nfunction centroidRingPoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var cosPhi = cos$1(phi),\n      x = cosPhi * cos$1(lambda),\n      y = cosPhi * sin$1(lambda),\n      z = sin$1(phi),\n      cx = y0 * z - z0 * y,\n      cy = z0 * x - x0 * z,\n      cz = x0 * y - y0 * x,\n      m = sqrt(cx * cx + cy * cy + cz * cz),\n      w = asin(m), // line weight = angle\n      v = m && -w / m; // area weight multiplier\n  X2 += v * cx;\n  Y2 += v * cy;\n  Z2 += v * cz;\n  W1 += w;\n  X1 += w * (x0 + (x0 = x));\n  Y1 += w * (y0 + (y0 = y));\n  Z1 += w * (z0 + (z0 = z));\n  centroidPointCartesian(x0, y0, z0);\n}\n\nfunction centroid(object) {\n  W0 = W1 =\n  X0 = Y0 = Z0 =\n  X1 = Y1 = Z1 =\n  X2 = Y2 = Z2 = 0;\n  geoStream(object, centroidStream);\n\n  var x = X2,\n      y = Y2,\n      z = Z2,\n      m = x * x + y * y + z * z;\n\n  // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.\n  if (m < epsilon2$1) {\n    x = X1, y = Y1, z = Z1;\n    // If the feature has zero length, fall back to arithmetic mean of point vectors.\n    if (W1 < epsilon$2) x = X0, y = Y0, z = Z0;\n    m = x * x + y * y + z * z;\n    // If the feature still has an undefined ccentroid, then return.\n    if (m < epsilon2$1) return [NaN, NaN];\n  }\n\n  return [atan2(y, x) * degrees$1, asin(z / sqrt(m)) * degrees$1];\n}\n\nfunction constant$8(x) {\n  return function() {\n    return x;\n  };\n}\n\nfunction compose(a, b) {\n\n  function compose(x, y) {\n    return x = a(x, y), b(x[0], x[1]);\n  }\n\n  if (a.invert && b.invert) compose.invert = function(x, y) {\n    return x = b.invert(x, y), x && a.invert(x[0], x[1]);\n  };\n\n  return compose;\n}\n\nfunction rotationIdentity(lambda, phi) {\n  return [abs(lambda) > pi$3 ? lambda + Math.round(-lambda / tau$3) * tau$3 : lambda, phi];\n}\n\nrotationIdentity.invert = rotationIdentity;\n\nfunction rotateRadians(deltaLambda, deltaPhi, deltaGamma) {\n  return (deltaLambda %= tau$3) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma))\n    : rotationLambda(deltaLambda))\n    : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma)\n    : rotationIdentity);\n}\n\nfunction forwardRotationLambda(deltaLambda) {\n  return function(lambda, phi) {\n    return lambda += deltaLambda, [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi];\n  };\n}\n\nfunction rotationLambda(deltaLambda) {\n  var rotation = forwardRotationLambda(deltaLambda);\n  rotation.invert = forwardRotationLambda(-deltaLambda);\n  return rotation;\n}\n\nfunction rotationPhiGamma(deltaPhi, deltaGamma) {\n  var cosDeltaPhi = cos$1(deltaPhi),\n      sinDeltaPhi = sin$1(deltaPhi),\n      cosDeltaGamma = cos$1(deltaGamma),\n      sinDeltaGamma = sin$1(deltaGamma);\n\n  function rotation(lambda, phi) {\n    var cosPhi = cos$1(phi),\n        x = cos$1(lambda) * cosPhi,\n        y = sin$1(lambda) * cosPhi,\n        z = sin$1(phi),\n        k = z * cosDeltaPhi + x * sinDeltaPhi;\n    return [\n      atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),\n      asin(k * cosDeltaGamma + y * sinDeltaGamma)\n    ];\n  }\n\n  rotation.invert = function(lambda, phi) {\n    var cosPhi = cos$1(phi),\n        x = cos$1(lambda) * cosPhi,\n        y = sin$1(lambda) * cosPhi,\n        z = sin$1(phi),\n        k = z * cosDeltaGamma - y * sinDeltaGamma;\n    return [\n      atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),\n      asin(k * cosDeltaPhi - x * sinDeltaPhi)\n    ];\n  };\n\n  return rotation;\n}\n\nfunction rotation(rotate) {\n  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);\n\n  function forward(coordinates) {\n    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);\n    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;\n  }\n\n  forward.invert = function(coordinates) {\n    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);\n    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;\n  };\n\n  return forward;\n}\n\n// Generates a circle centered at [0°, 0°], with a given radius and precision.\nfunction circleStream(stream, radius, delta, direction, t0, t1) {\n  if (!delta) return;\n  var cosRadius = cos$1(radius),\n      sinRadius = sin$1(radius),\n      step = direction * delta;\n  if (t0 == null) {\n    t0 = radius + direction * tau$3;\n    t1 = radius - step / 2;\n  } else {\n    t0 = circleRadius(cosRadius, t0);\n    t1 = circleRadius(cosRadius, t1);\n    if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau$3;\n  }\n  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {\n    point = spherical([cosRadius, -sinRadius * cos$1(t), -sinRadius * sin$1(t)]);\n    stream.point(point[0], point[1]);\n  }\n}\n\n// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].\nfunction circleRadius(cosRadius, point) {\n  point = cartesian(point), point[0] -= cosRadius;\n  cartesianNormalizeInPlace(point);\n  var radius = acos(-point[1]);\n  return ((-point[2] < 0 ? -radius : radius) + tau$3 - epsilon$2) % tau$3;\n}\n\nfunction circle() {\n  var center = constant$8([0, 0]),\n      radius = constant$8(90),\n      precision = constant$8(6),\n      ring,\n      rotate,\n      stream = {point: point};\n\n  function point(x, y) {\n    ring.push(x = rotate(x, y));\n    x[0] *= degrees$1, x[1] *= degrees$1;\n  }\n\n  function circle() {\n    var c = center.apply(this, arguments),\n        r = radius.apply(this, arguments) * radians,\n        p = precision.apply(this, arguments) * radians;\n    ring = [];\n    rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert;\n    circleStream(stream, r, p, 1);\n    c = {type: \"Polygon\", coordinates: [ring]};\n    ring = rotate = null;\n    return c;\n  }\n\n  circle.center = function(_) {\n    return arguments.length ? (center = typeof _ === \"function\" ? _ : constant$8([+_[0], +_[1]]), circle) : center;\n  };\n\n  circle.radius = function(_) {\n    return arguments.length ? (radius = typeof _ === \"function\" ? _ : constant$8(+_), circle) : radius;\n  };\n\n  circle.precision = function(_) {\n    return arguments.length ? (precision = typeof _ === \"function\" ? _ : constant$8(+_), circle) : precision;\n  };\n\n  return circle;\n}\n\nfunction clipBuffer() {\n  var lines = [],\n      line;\n  return {\n    point: function(x, y) {\n      line.push([x, y]);\n    },\n    lineStart: function() {\n      lines.push(line = []);\n    },\n    lineEnd: noop$2,\n    rejoin: function() {\n      if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));\n    },\n    result: function() {\n      var result = lines;\n      lines = [];\n      line = null;\n      return result;\n    }\n  };\n}\n\nfunction pointEqual(a, b) {\n  return abs(a[0] - b[0]) < epsilon$2 && abs(a[1] - b[1]) < epsilon$2;\n}\n\nfunction Intersection(point, points, other, entry) {\n  this.x = point;\n  this.z = points;\n  this.o = other; // another intersection\n  this.e = entry; // is an entry?\n  this.v = false; // visited\n  this.n = this.p = null; // next & previous\n}\n\n// A generalized polygon clipping algorithm: given a polygon that has been cut\n// into its visible line segments, and rejoins the segments by interpolating\n// along the clip edge.\nfunction clipRejoin(segments, compareIntersection, startInside, interpolate, stream) {\n  var subject = [],\n      clip = [],\n      i,\n      n;\n\n  segments.forEach(function(segment) {\n    if ((n = segment.length - 1) <= 0) return;\n    var n, p0 = segment[0], p1 = segment[n], x;\n\n    // If the first and last points of a segment are coincident, then treat as a\n    // closed ring. TODO if all rings are closed, then the winding order of the\n    // exterior ring should be checked.\n    if (pointEqual(p0, p1)) {\n      stream.lineStart();\n      for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]);\n      stream.lineEnd();\n      return;\n    }\n\n    subject.push(x = new Intersection(p0, segment, null, true));\n    clip.push(x.o = new Intersection(p0, null, x, false));\n    subject.push(x = new Intersection(p1, segment, null, false));\n    clip.push(x.o = new Intersection(p1, null, x, true));\n  });\n\n  if (!subject.length) return;\n\n  clip.sort(compareIntersection);\n  link$1(subject);\n  link$1(clip);\n\n  for (i = 0, n = clip.length; i < n; ++i) {\n    clip[i].e = startInside = !startInside;\n  }\n\n  var start = subject[0],\n      points,\n      point;\n\n  while (1) {\n    // Find first unvisited intersection.\n    var current = start,\n        isSubject = true;\n    while (current.v) if ((current = current.n) === start) return;\n    points = current.z;\n    stream.lineStart();\n    do {\n      current.v = current.o.v = true;\n      if (current.e) {\n        if (isSubject) {\n          for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]);\n        } else {\n          interpolate(current.x, current.n.x, 1, stream);\n        }\n        current = current.n;\n      } else {\n        if (isSubject) {\n          points = current.p.z;\n          for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]);\n        } else {\n          interpolate(current.x, current.p.x, -1, stream);\n        }\n        current = current.p;\n      }\n      current = current.o;\n      points = current.z;\n      isSubject = !isSubject;\n    } while (!current.v);\n    stream.lineEnd();\n  }\n}\n\nfunction link$1(array) {\n  if (!(n = array.length)) return;\n  var n,\n      i = 0,\n      a = array[0],\n      b;\n  while (++i < n) {\n    a.n = b = array[i];\n    b.p = a;\n    a = b;\n  }\n  a.n = b = array[0];\n  b.p = a;\n}\n\nvar sum$1 = adder();\n\nfunction longitude(point) {\n  if (abs(point[0]) <= pi$3)\n    return point[0];\n  else\n    return sign(point[0]) * ((abs(point[0]) + pi$3) % tau$3 - pi$3);\n}\n\nfunction polygonContains(polygon, point) {\n  var lambda = longitude(point),\n      phi = point[1],\n      sinPhi = sin$1(phi),\n      normal = [sin$1(lambda), -cos$1(lambda), 0],\n      angle = 0,\n      winding = 0;\n\n  sum$1.reset();\n\n  if (sinPhi === 1) phi = halfPi$2 + epsilon$2;\n  else if (sinPhi === -1) phi = -halfPi$2 - epsilon$2;\n\n  for (var i = 0, n = polygon.length; i < n; ++i) {\n    if (!(m = (ring = polygon[i]).length)) continue;\n    var ring,\n        m,\n        point0 = ring[m - 1],\n        lambda0 = longitude(point0),\n        phi0 = point0[1] / 2 + quarterPi,\n        sinPhi0 = sin$1(phi0),\n        cosPhi0 = cos$1(phi0);\n\n    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {\n      var point1 = ring[j],\n          lambda1 = longitude(point1),\n          phi1 = point1[1] / 2 + quarterPi,\n          sinPhi1 = sin$1(phi1),\n          cosPhi1 = cos$1(phi1),\n          delta = lambda1 - lambda0,\n          sign = delta >= 0 ? 1 : -1,\n          absDelta = sign * delta,\n          antimeridian = absDelta > pi$3,\n          k = sinPhi0 * sinPhi1;\n\n      sum$1.add(atan2(k * sign * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta)));\n      angle += antimeridian ? delta + sign * tau$3 : delta;\n\n      // Are the longitudes either side of the point’s meridian (lambda),\n      // and are the latitudes smaller than the parallel (phi)?\n      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {\n        var arc = cartesianCross(cartesian(point0), cartesian(point1));\n        cartesianNormalizeInPlace(arc);\n        var intersection = cartesianCross(normal, arc);\n        cartesianNormalizeInPlace(intersection);\n        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);\n        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {\n          winding += antimeridian ^ delta >= 0 ? 1 : -1;\n        }\n      }\n    }\n  }\n\n  // First, determine whether the South pole is inside or outside:\n  //\n  // It is inside if:\n  // * the polygon winds around it in a clockwise direction.\n  // * the polygon does not (cumulatively) wind around it, but has a negative\n  //   (counter-clockwise) area.\n  //\n  // Second, count the (signed) number of times a segment crosses a lambda\n  // from the point to the South pole.  If it is zero, then the point is the\n  // same side as the South pole.\n\n  return (angle < -epsilon$2 || angle < epsilon$2 && sum$1 < -epsilon$2) ^ (winding & 1);\n}\n\nfunction clip(pointVisible, clipLine, interpolate, start) {\n  return function(sink) {\n    var line = clipLine(sink),\n        ringBuffer = clipBuffer(),\n        ringSink = clipLine(ringBuffer),\n        polygonStarted = false,\n        polygon,\n        segments,\n        ring;\n\n    var clip = {\n      point: point,\n      lineStart: lineStart,\n      lineEnd: lineEnd,\n      polygonStart: function() {\n        clip.point = pointRing;\n        clip.lineStart = ringStart;\n        clip.lineEnd = ringEnd;\n        segments = [];\n        polygon = [];\n      },\n      polygonEnd: function() {\n        clip.point = point;\n        clip.lineStart = lineStart;\n        clip.lineEnd = lineEnd;\n        segments = merge(segments);\n        var startInside = polygonContains(polygon, start);\n        if (segments.length) {\n          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;\n          clipRejoin(segments, compareIntersection, startInside, interpolate, sink);\n        } else if (startInside) {\n          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;\n          sink.lineStart();\n          interpolate(null, null, 1, sink);\n          sink.lineEnd();\n        }\n        if (polygonStarted) sink.polygonEnd(), polygonStarted = false;\n        segments = polygon = null;\n      },\n      sphere: function() {\n        sink.polygonStart();\n        sink.lineStart();\n        interpolate(null, null, 1, sink);\n        sink.lineEnd();\n        sink.polygonEnd();\n      }\n    };\n\n    function point(lambda, phi) {\n      if (pointVisible(lambda, phi)) sink.point(lambda, phi);\n    }\n\n    function pointLine(lambda, phi) {\n      line.point(lambda, phi);\n    }\n\n    function lineStart() {\n      clip.point = pointLine;\n      line.lineStart();\n    }\n\n    function lineEnd() {\n      clip.point = point;\n      line.lineEnd();\n    }\n\n    function pointRing(lambda, phi) {\n      ring.push([lambda, phi]);\n      ringSink.point(lambda, phi);\n    }\n\n    function ringStart() {\n      ringSink.lineStart();\n      ring = [];\n    }\n\n    function ringEnd() {\n      pointRing(ring[0][0], ring[0][1]);\n      ringSink.lineEnd();\n\n      var clean = ringSink.clean(),\n          ringSegments = ringBuffer.result(),\n          i, n = ringSegments.length, m,\n          segment,\n          point;\n\n      ring.pop();\n      polygon.push(ring);\n      ring = null;\n\n      if (!n) return;\n\n      // No intersections.\n      if (clean & 1) {\n        segment = ringSegments[0];\n        if ((m = segment.length - 1) > 0) {\n          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;\n          sink.lineStart();\n          for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]);\n          sink.lineEnd();\n        }\n        return;\n      }\n\n      // Rejoin connected segments.\n      // TODO reuse ringBuffer.rejoin()?\n      if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));\n\n      segments.push(ringSegments.filter(validSegment));\n    }\n\n    return clip;\n  };\n}\n\nfunction validSegment(segment) {\n  return segment.length > 1;\n}\n\n// Intersections are sorted along the clip edge. For both antimeridian cutting\n// and circle clipping, the same comparison is used.\nfunction compareIntersection(a, b) {\n  return ((a = a.x)[0] < 0 ? a[1] - halfPi$2 - epsilon$2 : halfPi$2 - a[1])\n       - ((b = b.x)[0] < 0 ? b[1] - halfPi$2 - epsilon$2 : halfPi$2 - b[1]);\n}\n\nvar clipAntimeridian = clip(\n  function() { return true; },\n  clipAntimeridianLine,\n  clipAntimeridianInterpolate,\n  [-pi$3, -halfPi$2]\n);\n\n// Takes a line and cuts into visible segments. Return values: 0 - there were\n// intersections or the line was empty; 1 - no intersections; 2 - there were\n// intersections, and the first and last segments should be rejoined.\nfunction clipAntimeridianLine(stream) {\n  var lambda0 = NaN,\n      phi0 = NaN,\n      sign0 = NaN,\n      clean; // no intersections\n\n  return {\n    lineStart: function() {\n      stream.lineStart();\n      clean = 1;\n    },\n    point: function(lambda1, phi1) {\n      var sign1 = lambda1 > 0 ? pi$3 : -pi$3,\n          delta = abs(lambda1 - lambda0);\n      if (abs(delta - pi$3) < epsilon$2) { // line crosses a pole\n        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi$2 : -halfPi$2);\n        stream.point(sign0, phi0);\n        stream.lineEnd();\n        stream.lineStart();\n        stream.point(sign1, phi0);\n        stream.point(lambda1, phi0);\n        clean = 0;\n      } else if (sign0 !== sign1 && delta >= pi$3) { // line crosses antimeridian\n        if (abs(lambda0 - sign0) < epsilon$2) lambda0 -= sign0 * epsilon$2; // handle degeneracies\n        if (abs(lambda1 - sign1) < epsilon$2) lambda1 -= sign1 * epsilon$2;\n        phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);\n        stream.point(sign0, phi0);\n        stream.lineEnd();\n        stream.lineStart();\n        stream.point(sign1, phi0);\n        clean = 0;\n      }\n      stream.point(lambda0 = lambda1, phi0 = phi1);\n      sign0 = sign1;\n    },\n    lineEnd: function() {\n      stream.lineEnd();\n      lambda0 = phi0 = NaN;\n    },\n    clean: function() {\n      return 2 - clean; // if intersections, rejoin first and last segments\n    }\n  };\n}\n\nfunction clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {\n  var cosPhi0,\n      cosPhi1,\n      sinLambda0Lambda1 = sin$1(lambda0 - lambda1);\n  return abs(sinLambda0Lambda1) > epsilon$2\n      ? atan((sin$1(phi0) * (cosPhi1 = cos$1(phi1)) * sin$1(lambda1)\n          - sin$1(phi1) * (cosPhi0 = cos$1(phi0)) * sin$1(lambda0))\n          / (cosPhi0 * cosPhi1 * sinLambda0Lambda1))\n      : (phi0 + phi1) / 2;\n}\n\nfunction clipAntimeridianInterpolate(from, to, direction, stream) {\n  var phi;\n  if (from == null) {\n    phi = direction * halfPi$2;\n    stream.point(-pi$3, phi);\n    stream.point(0, phi);\n    stream.point(pi$3, phi);\n    stream.point(pi$3, 0);\n    stream.point(pi$3, -phi);\n    stream.point(0, -phi);\n    stream.point(-pi$3, -phi);\n    stream.point(-pi$3, 0);\n    stream.point(-pi$3, phi);\n  } else if (abs(from[0] - to[0]) > epsilon$2) {\n    var lambda = from[0] < to[0] ? pi$3 : -pi$3;\n    phi = direction * lambda / 2;\n    stream.point(-lambda, phi);\n    stream.point(0, phi);\n    stream.point(lambda, phi);\n  } else {\n    stream.point(to[0], to[1]);\n  }\n}\n\nfunction clipCircle(radius) {\n  var cr = cos$1(radius),\n      delta = 6 * radians,\n      smallRadius = cr > 0,\n      notHemisphere = abs(cr) > epsilon$2; // TODO optimise for this common case\n\n  function interpolate(from, to, direction, stream) {\n    circleStream(stream, radius, delta, direction, from, to);\n  }\n\n  function visible(lambda, phi) {\n    return cos$1(lambda) * cos$1(phi) > cr;\n  }\n\n  // Takes a line and cuts into visible segments. Return values used for polygon\n  // clipping: 0 - there were intersections or the line was empty; 1 - no\n  // intersections 2 - there were intersections, and the first and last segments\n  // should be rejoined.\n  function clipLine(stream) {\n    var point0, // previous point\n        c0, // code for previous point\n        v0, // visibility of previous point\n        v00, // visibility of first point\n        clean; // no intersections\n    return {\n      lineStart: function() {\n        v00 = v0 = false;\n        clean = 1;\n      },\n      point: function(lambda, phi) {\n        var point1 = [lambda, phi],\n            point2,\n            v = visible(lambda, phi),\n            c = smallRadius\n              ? v ? 0 : code(lambda, phi)\n              : v ? code(lambda + (lambda < 0 ? pi$3 : -pi$3), phi) : 0;\n        if (!point0 && (v00 = v0 = v)) stream.lineStart();\n        // Handle degeneracies.\n        // TODO ignore if not clipping polygons.\n        if (v !== v0) {\n          point2 = intersect(point0, point1);\n          if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2)) {\n            point1[0] += epsilon$2;\n            point1[1] += epsilon$2;\n            v = visible(point1[0], point1[1]);\n          }\n        }\n        if (v !== v0) {\n          clean = 0;\n          if (v) {\n            // outside going in\n            stream.lineStart();\n            point2 = intersect(point1, point0);\n            stream.point(point2[0], point2[1]);\n          } else {\n            // inside going out\n            point2 = intersect(point0, point1);\n            stream.point(point2[0], point2[1]);\n            stream.lineEnd();\n          }\n          point0 = point2;\n        } else if (notHemisphere && point0 && smallRadius ^ v) {\n          var t;\n          // If the codes for two points are different, or are both zero,\n          // and there this segment intersects with the small circle.\n          if (!(c & c0) && (t = intersect(point1, point0, true))) {\n            clean = 0;\n            if (smallRadius) {\n              stream.lineStart();\n              stream.point(t[0][0], t[0][1]);\n              stream.point(t[1][0], t[1][1]);\n              stream.lineEnd();\n            } else {\n              stream.point(t[1][0], t[1][1]);\n              stream.lineEnd();\n              stream.lineStart();\n              stream.point(t[0][0], t[0][1]);\n            }\n          }\n        }\n        if (v && (!point0 || !pointEqual(point0, point1))) {\n          stream.point(point1[0], point1[1]);\n        }\n        point0 = point1, v0 = v, c0 = c;\n      },\n      lineEnd: function() {\n        if (v0) stream.lineEnd();\n        point0 = null;\n      },\n      // Rejoin first and last segments if there were intersections and the first\n      // and last points were visible.\n      clean: function() {\n        return clean | ((v00 && v0) << 1);\n      }\n    };\n  }\n\n  // Intersects the great circle between a and b with the clip circle.\n  function intersect(a, b, two) {\n    var pa = cartesian(a),\n        pb = cartesian(b);\n\n    // We have two planes, n1.p = d1 and n2.p = d2.\n    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).\n    var n1 = [1, 0, 0], // normal\n        n2 = cartesianCross(pa, pb),\n        n2n2 = cartesianDot(n2, n2),\n        n1n2 = n2[0], // cartesianDot(n1, n2),\n        determinant = n2n2 - n1n2 * n1n2;\n\n    // Two polar points.\n    if (!determinant) return !two && a;\n\n    var c1 =  cr * n2n2 / determinant,\n        c2 = -cr * n1n2 / determinant,\n        n1xn2 = cartesianCross(n1, n2),\n        A = cartesianScale(n1, c1),\n        B = cartesianScale(n2, c2);\n    cartesianAddInPlace(A, B);\n\n    // Solve |p(t)|^2 = 1.\n    var u = n1xn2,\n        w = cartesianDot(A, u),\n        uu = cartesianDot(u, u),\n        t2 = w * w - uu * (cartesianDot(A, A) - 1);\n\n    if (t2 < 0) return;\n\n    var t = sqrt(t2),\n        q = cartesianScale(u, (-w - t) / uu);\n    cartesianAddInPlace(q, A);\n    q = spherical(q);\n\n    if (!two) return q;\n\n    // Two intersection points.\n    var lambda0 = a[0],\n        lambda1 = b[0],\n        phi0 = a[1],\n        phi1 = b[1],\n        z;\n\n    if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;\n\n    var delta = lambda1 - lambda0,\n        polar = abs(delta - pi$3) < epsilon$2,\n        meridian = polar || delta < epsilon$2;\n\n    if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z;\n\n    // Check that the first point is between a and b.\n    if (meridian\n        ? polar\n          ? phi0 + phi1 > 0 ^ q[1] < (abs(q[0] - lambda0) < epsilon$2 ? phi0 : phi1)\n          : phi0 <= q[1] && q[1] <= phi1\n        : delta > pi$3 ^ (lambda0 <= q[0] && q[0] <= lambda1)) {\n      var q1 = cartesianScale(u, (-w + t) / uu);\n      cartesianAddInPlace(q1, A);\n      return [q, spherical(q1)];\n    }\n  }\n\n  // Generates a 4-bit vector representing the location of a point relative to\n  // the small circle's bounding box.\n  function code(lambda, phi) {\n    var r = smallRadius ? radius : pi$3 - radius,\n        code = 0;\n    if (lambda < -r) code |= 1; // left\n    else if (lambda > r) code |= 2; // right\n    if (phi < -r) code |= 4; // below\n    else if (phi > r) code |= 8; // above\n    return code;\n  }\n\n  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi$3, radius - pi$3]);\n}\n\nfunction clipLine(a, b, x0, y0, x1, y1) {\n  var ax = a[0],\n      ay = a[1],\n      bx = b[0],\n      by = b[1],\n      t0 = 0,\n      t1 = 1,\n      dx = bx - ax,\n      dy = by - ay,\n      r;\n\n  r = x0 - ax;\n  if (!dx && r > 0) return;\n  r /= dx;\n  if (dx < 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  } else if (dx > 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  }\n\n  r = x1 - ax;\n  if (!dx && r < 0) return;\n  r /= dx;\n  if (dx < 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  } else if (dx > 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  }\n\n  r = y0 - ay;\n  if (!dy && r > 0) return;\n  r /= dy;\n  if (dy < 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  } else if (dy > 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  }\n\n  r = y1 - ay;\n  if (!dy && r < 0) return;\n  r /= dy;\n  if (dy < 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  } else if (dy > 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  }\n\n  if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;\n  if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;\n  return true;\n}\n\nvar clipMax = 1e9, clipMin = -clipMax;\n\n// TODO Use d3-polygon’s polygonContains here for the ring check?\n// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?\n\nfunction clipRectangle(x0, y0, x1, y1) {\n\n  function visible(x, y) {\n    return x0 <= x && x <= x1 && y0 <= y && y <= y1;\n  }\n\n  function interpolate(from, to, direction, stream) {\n    var a = 0, a1 = 0;\n    if (from == null\n        || (a = corner(from, direction)) !== (a1 = corner(to, direction))\n        || comparePoint(from, to) < 0 ^ direction > 0) {\n      do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);\n      while ((a = (a + direction + 4) % 4) !== a1);\n    } else {\n      stream.point(to[0], to[1]);\n    }\n  }\n\n  function corner(p, direction) {\n    return abs(p[0] - x0) < epsilon$2 ? direction > 0 ? 0 : 3\n        : abs(p[0] - x1) < epsilon$2 ? direction > 0 ? 2 : 1\n        : abs(p[1] - y0) < epsilon$2 ? direction > 0 ? 1 : 0\n        : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon\n  }\n\n  function compareIntersection(a, b) {\n    return comparePoint(a.x, b.x);\n  }\n\n  function comparePoint(a, b) {\n    var ca = corner(a, 1),\n        cb = corner(b, 1);\n    return ca !== cb ? ca - cb\n        : ca === 0 ? b[1] - a[1]\n        : ca === 1 ? a[0] - b[0]\n        : ca === 2 ? a[1] - b[1]\n        : b[0] - a[0];\n  }\n\n  return function(stream) {\n    var activeStream = stream,\n        bufferStream = clipBuffer(),\n        segments,\n        polygon,\n        ring,\n        x__, y__, v__, // first point\n        x_, y_, v_, // previous point\n        first,\n        clean;\n\n    var clipStream = {\n      point: point,\n      lineStart: lineStart,\n      lineEnd: lineEnd,\n      polygonStart: polygonStart,\n      polygonEnd: polygonEnd\n    };\n\n    function point(x, y) {\n      if (visible(x, y)) activeStream.point(x, y);\n    }\n\n    function polygonInside() {\n      var winding = 0;\n\n      for (var i = 0, n = polygon.length; i < n; ++i) {\n        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {\n          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];\n          if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding; }\n          else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding; }\n        }\n      }\n\n      return winding;\n    }\n\n    // Buffer geometry within a polygon and then clip it en masse.\n    function polygonStart() {\n      activeStream = bufferStream, segments = [], polygon = [], clean = true;\n    }\n\n    function polygonEnd() {\n      var startInside = polygonInside(),\n          cleanInside = clean && startInside,\n          visible = (segments = merge(segments)).length;\n      if (cleanInside || visible) {\n        stream.polygonStart();\n        if (cleanInside) {\n          stream.lineStart();\n          interpolate(null, null, 1, stream);\n          stream.lineEnd();\n        }\n        if (visible) {\n          clipRejoin(segments, compareIntersection, startInside, interpolate, stream);\n        }\n        stream.polygonEnd();\n      }\n      activeStream = stream, segments = polygon = ring = null;\n    }\n\n    function lineStart() {\n      clipStream.point = linePoint;\n      if (polygon) polygon.push(ring = []);\n      first = true;\n      v_ = false;\n      x_ = y_ = NaN;\n    }\n\n    // TODO rather than special-case polygons, simply handle them separately.\n    // Ideally, coincident intersection points should be jittered to avoid\n    // clipping issues.\n    function lineEnd() {\n      if (segments) {\n        linePoint(x__, y__);\n        if (v__ && v_) bufferStream.rejoin();\n        segments.push(bufferStream.result());\n      }\n      clipStream.point = point;\n      if (v_) activeStream.lineEnd();\n    }\n\n    function linePoint(x, y) {\n      var v = visible(x, y);\n      if (polygon) ring.push([x, y]);\n      if (first) {\n        x__ = x, y__ = y, v__ = v;\n        first = false;\n        if (v) {\n          activeStream.lineStart();\n          activeStream.point(x, y);\n        }\n      } else {\n        if (v && v_) activeStream.point(x, y);\n        else {\n          var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],\n              b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];\n          if (clipLine(a, b, x0, y0, x1, y1)) {\n            if (!v_) {\n              activeStream.lineStart();\n              activeStream.point(a[0], a[1]);\n            }\n            activeStream.point(b[0], b[1]);\n            if (!v) activeStream.lineEnd();\n            clean = false;\n          } else if (v) {\n            activeStream.lineStart();\n            activeStream.point(x, y);\n            clean = false;\n          }\n        }\n      }\n      x_ = x, y_ = y, v_ = v;\n    }\n\n    return clipStream;\n  };\n}\n\nfunction extent$1() {\n  var x0 = 0,\n      y0 = 0,\n      x1 = 960,\n      y1 = 500,\n      cache,\n      cacheStream,\n      clip;\n\n  return clip = {\n    stream: function(stream) {\n      return cache && cacheStream === stream ? cache : cache = clipRectangle(x0, y0, x1, y1)(cacheStream = stream);\n    },\n    extent: function(_) {\n      return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [[x0, y0], [x1, y1]];\n    }\n  };\n}\n\nvar lengthSum = adder(),\n    lambda0$2,\n    sinPhi0$1,\n    cosPhi0$1;\n\nvar lengthStream = {\n  sphere: noop$2,\n  point: noop$2,\n  lineStart: lengthLineStart,\n  lineEnd: noop$2,\n  polygonStart: noop$2,\n  polygonEnd: noop$2\n};\n\nfunction lengthLineStart() {\n  lengthStream.point = lengthPointFirst;\n  lengthStream.lineEnd = lengthLineEnd;\n}\n\nfunction lengthLineEnd() {\n  lengthStream.point = lengthStream.lineEnd = noop$2;\n}\n\nfunction lengthPointFirst(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  lambda0$2 = lambda, sinPhi0$1 = sin$1(phi), cosPhi0$1 = cos$1(phi);\n  lengthStream.point = lengthPoint;\n}\n\nfunction lengthPoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var sinPhi = sin$1(phi),\n      cosPhi = cos$1(phi),\n      delta = abs(lambda - lambda0$2),\n      cosDelta = cos$1(delta),\n      sinDelta = sin$1(delta),\n      x = cosPhi * sinDelta,\n      y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,\n      z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;\n  lengthSum.add(atan2(sqrt(x * x + y * y), z));\n  lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;\n}\n\nfunction length$1(object) {\n  lengthSum.reset();\n  geoStream(object, lengthStream);\n  return +lengthSum;\n}\n\nvar coordinates = [null, null],\n    object$1 = {type: \"LineString\", coordinates: coordinates};\n\nfunction distance(a, b) {\n  coordinates[0] = a;\n  coordinates[1] = b;\n  return length$1(object$1);\n}\n\nvar containsObjectType = {\n  Feature: function(object, point) {\n    return containsGeometry(object.geometry, point);\n  },\n  FeatureCollection: function(object, point) {\n    var features = object.features, i = -1, n = features.length;\n    while (++i < n) if (containsGeometry(features[i].geometry, point)) return true;\n    return false;\n  }\n};\n\nvar containsGeometryType = {\n  Sphere: function() {\n    return true;\n  },\n  Point: function(object, point) {\n    return containsPoint(object.coordinates, point);\n  },\n  MultiPoint: function(object, point) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) if (containsPoint(coordinates[i], point)) return true;\n    return false;\n  },\n  LineString: function(object, point) {\n    return containsLine(object.coordinates, point);\n  },\n  MultiLineString: function(object, point) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) if (containsLine(coordinates[i], point)) return true;\n    return false;\n  },\n  Polygon: function(object, point) {\n    return containsPolygon(object.coordinates, point);\n  },\n  MultiPolygon: function(object, point) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) if (containsPolygon(coordinates[i], point)) return true;\n    return false;\n  },\n  GeometryCollection: function(object, point) {\n    var geometries = object.geometries, i = -1, n = geometries.length;\n    while (++i < n) if (containsGeometry(geometries[i], point)) return true;\n    return false;\n  }\n};\n\nfunction containsGeometry(geometry, point) {\n  return geometry && containsGeometryType.hasOwnProperty(geometry.type)\n      ? containsGeometryType[geometry.type](geometry, point)\n      : false;\n}\n\nfunction containsPoint(coordinates, point) {\n  return distance(coordinates, point) === 0;\n}\n\nfunction containsLine(coordinates, point) {\n  var ao, bo, ab;\n  for (var i = 0, n = coordinates.length; i < n; i++) {\n    bo = distance(coordinates[i], point);\n    if (bo === 0) return true;\n    if (i > 0) {\n      ab = distance(coordinates[i], coordinates[i - 1]);\n      if (\n        ab > 0 &&\n        ao <= ab &&\n        bo <= ab &&\n        (ao + bo - ab) * (1 - Math.pow((ao - bo) / ab, 2)) < epsilon2$1 * ab\n      )\n        return true;\n    }\n    ao = bo;\n  }\n  return false;\n}\n\nfunction containsPolygon(coordinates, point) {\n  return !!polygonContains(coordinates.map(ringRadians), pointRadians(point));\n}\n\nfunction ringRadians(ring) {\n  return ring = ring.map(pointRadians), ring.pop(), ring;\n}\n\nfunction pointRadians(point) {\n  return [point[0] * radians, point[1] * radians];\n}\n\nfunction contains$1(object, point) {\n  return (object && containsObjectType.hasOwnProperty(object.type)\n      ? containsObjectType[object.type]\n      : containsGeometry)(object, point);\n}\n\nfunction graticuleX(y0, y1, dy) {\n  var y = sequence(y0, y1 - epsilon$2, dy).concat(y1);\n  return function(x) { return y.map(function(y) { return [x, y]; }); };\n}\n\nfunction graticuleY(x0, x1, dx) {\n  var x = sequence(x0, x1 - epsilon$2, dx).concat(x1);\n  return function(y) { return x.map(function(x) { return [x, y]; }); };\n}\n\nfunction graticule() {\n  var x1, x0, X1, X0,\n      y1, y0, Y1, Y0,\n      dx = 10, dy = dx, DX = 90, DY = 360,\n      x, y, X, Y,\n      precision = 2.5;\n\n  function graticule() {\n    return {type: \"MultiLineString\", coordinates: lines()};\n  }\n\n  function lines() {\n    return sequence(ceil(X0 / DX) * DX, X1, DX).map(X)\n        .concat(sequence(ceil(Y0 / DY) * DY, Y1, DY).map(Y))\n        .concat(sequence(ceil(x0 / dx) * dx, x1, dx).filter(function(x) { return abs(x % DX) > epsilon$2; }).map(x))\n        .concat(sequence(ceil(y0 / dy) * dy, y1, dy).filter(function(y) { return abs(y % DY) > epsilon$2; }).map(y));\n  }\n\n  graticule.lines = function() {\n    return lines().map(function(coordinates) { return {type: \"LineString\", coordinates: coordinates}; });\n  };\n\n  graticule.outline = function() {\n    return {\n      type: \"Polygon\",\n      coordinates: [\n        X(X0).concat(\n        Y(Y1).slice(1),\n        X(X1).reverse().slice(1),\n        Y(Y0).reverse().slice(1))\n      ]\n    };\n  };\n\n  graticule.extent = function(_) {\n    if (!arguments.length) return graticule.extentMinor();\n    return graticule.extentMajor(_).extentMinor(_);\n  };\n\n  graticule.extentMajor = function(_) {\n    if (!arguments.length) return [[X0, Y0], [X1, Y1]];\n    X0 = +_[0][0], X1 = +_[1][0];\n    Y0 = +_[0][1], Y1 = +_[1][1];\n    if (X0 > X1) _ = X0, X0 = X1, X1 = _;\n    if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;\n    return graticule.precision(precision);\n  };\n\n  graticule.extentMinor = function(_) {\n    if (!arguments.length) return [[x0, y0], [x1, y1]];\n    x0 = +_[0][0], x1 = +_[1][0];\n    y0 = +_[0][1], y1 = +_[1][1];\n    if (x0 > x1) _ = x0, x0 = x1, x1 = _;\n    if (y0 > y1) _ = y0, y0 = y1, y1 = _;\n    return graticule.precision(precision);\n  };\n\n  graticule.step = function(_) {\n    if (!arguments.length) return graticule.stepMinor();\n    return graticule.stepMajor(_).stepMinor(_);\n  };\n\n  graticule.stepMajor = function(_) {\n    if (!arguments.length) return [DX, DY];\n    DX = +_[0], DY = +_[1];\n    return graticule;\n  };\n\n  graticule.stepMinor = function(_) {\n    if (!arguments.length) return [dx, dy];\n    dx = +_[0], dy = +_[1];\n    return graticule;\n  };\n\n  graticule.precision = function(_) {\n    if (!arguments.length) return precision;\n    precision = +_;\n    x = graticuleX(y0, y1, 90);\n    y = graticuleY(x0, x1, precision);\n    X = graticuleX(Y0, Y1, 90);\n    Y = graticuleY(X0, X1, precision);\n    return graticule;\n  };\n\n  return graticule\n      .extentMajor([[-180, -90 + epsilon$2], [180, 90 - epsilon$2]])\n      .extentMinor([[-180, -80 - epsilon$2], [180, 80 + epsilon$2]]);\n}\n\nfunction graticule10() {\n  return graticule()();\n}\n\nfunction interpolate$1(a, b) {\n  var x0 = a[0] * radians,\n      y0 = a[1] * radians,\n      x1 = b[0] * radians,\n      y1 = b[1] * radians,\n      cy0 = cos$1(y0),\n      sy0 = sin$1(y0),\n      cy1 = cos$1(y1),\n      sy1 = sin$1(y1),\n      kx0 = cy0 * cos$1(x0),\n      ky0 = cy0 * sin$1(x0),\n      kx1 = cy1 * cos$1(x1),\n      ky1 = cy1 * sin$1(x1),\n      d = 2 * asin(sqrt(haversin(y1 - y0) + cy0 * cy1 * haversin(x1 - x0))),\n      k = sin$1(d);\n\n  var interpolate = d ? function(t) {\n    var B = sin$1(t *= d) / k,\n        A = sin$1(d - t) / k,\n        x = A * kx0 + B * kx1,\n        y = A * ky0 + B * ky1,\n        z = A * sy0 + B * sy1;\n    return [\n      atan2(y, x) * degrees$1,\n      atan2(z, sqrt(x * x + y * y)) * degrees$1\n    ];\n  } : function() {\n    return [x0 * degrees$1, y0 * degrees$1];\n  };\n\n  interpolate.distance = d;\n\n  return interpolate;\n}\n\nfunction identity$4(x) {\n  return x;\n}\n\nvar areaSum$1 = adder(),\n    areaRingSum$1 = adder(),\n    x00,\n    y00,\n    x0$1,\n    y0$1;\n\nvar areaStream$1 = {\n  point: noop$2,\n  lineStart: noop$2,\n  lineEnd: noop$2,\n  polygonStart: function() {\n    areaStream$1.lineStart = areaRingStart$1;\n    areaStream$1.lineEnd = areaRingEnd$1;\n  },\n  polygonEnd: function() {\n    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$2;\n    areaSum$1.add(abs(areaRingSum$1));\n    areaRingSum$1.reset();\n  },\n  result: function() {\n    var area = areaSum$1 / 2;\n    areaSum$1.reset();\n    return area;\n  }\n};\n\nfunction areaRingStart$1() {\n  areaStream$1.point = areaPointFirst$1;\n}\n\nfunction areaPointFirst$1(x, y) {\n  areaStream$1.point = areaPoint$1;\n  x00 = x0$1 = x, y00 = y0$1 = y;\n}\n\nfunction areaPoint$1(x, y) {\n  areaRingSum$1.add(y0$1 * x - x0$1 * y);\n  x0$1 = x, y0$1 = y;\n}\n\nfunction areaRingEnd$1() {\n  areaPoint$1(x00, y00);\n}\n\nvar x0$2 = Infinity,\n    y0$2 = x0$2,\n    x1 = -x0$2,\n    y1 = x1;\n\nvar boundsStream$1 = {\n  point: boundsPoint$1,\n  lineStart: noop$2,\n  lineEnd: noop$2,\n  polygonStart: noop$2,\n  polygonEnd: noop$2,\n  result: function() {\n    var bounds = [[x0$2, y0$2], [x1, y1]];\n    x1 = y1 = -(y0$2 = x0$2 = Infinity);\n    return bounds;\n  }\n};\n\nfunction boundsPoint$1(x, y) {\n  if (x < x0$2) x0$2 = x;\n  if (x > x1) x1 = x;\n  if (y < y0$2) y0$2 = y;\n  if (y > y1) y1 = y;\n}\n\n// TODO Enforce positive area for exterior, negative area for interior?\n\nvar X0$1 = 0,\n    Y0$1 = 0,\n    Z0$1 = 0,\n    X1$1 = 0,\n    Y1$1 = 0,\n    Z1$1 = 0,\n    X2$1 = 0,\n    Y2$1 = 0,\n    Z2$1 = 0,\n    x00$1,\n    y00$1,\n    x0$3,\n    y0$3;\n\nvar centroidStream$1 = {\n  point: centroidPoint$1,\n  lineStart: centroidLineStart$1,\n  lineEnd: centroidLineEnd$1,\n  polygonStart: function() {\n    centroidStream$1.lineStart = centroidRingStart$1;\n    centroidStream$1.lineEnd = centroidRingEnd$1;\n  },\n  polygonEnd: function() {\n    centroidStream$1.point = centroidPoint$1;\n    centroidStream$1.lineStart = centroidLineStart$1;\n    centroidStream$1.lineEnd = centroidLineEnd$1;\n  },\n  result: function() {\n    var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1]\n        : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1]\n        : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1]\n        : [NaN, NaN];\n    X0$1 = Y0$1 = Z0$1 =\n    X1$1 = Y1$1 = Z1$1 =\n    X2$1 = Y2$1 = Z2$1 = 0;\n    return centroid;\n  }\n};\n\nfunction centroidPoint$1(x, y) {\n  X0$1 += x;\n  Y0$1 += y;\n  ++Z0$1;\n}\n\nfunction centroidLineStart$1() {\n  centroidStream$1.point = centroidPointFirstLine;\n}\n\nfunction centroidPointFirstLine(x, y) {\n  centroidStream$1.point = centroidPointLine;\n  centroidPoint$1(x0$3 = x, y0$3 = y);\n}\n\nfunction centroidPointLine(x, y) {\n  var dx = x - x0$3, dy = y - y0$3, z = sqrt(dx * dx + dy * dy);\n  X1$1 += z * (x0$3 + x) / 2;\n  Y1$1 += z * (y0$3 + y) / 2;\n  Z1$1 += z;\n  centroidPoint$1(x0$3 = x, y0$3 = y);\n}\n\nfunction centroidLineEnd$1() {\n  centroidStream$1.point = centroidPoint$1;\n}\n\nfunction centroidRingStart$1() {\n  centroidStream$1.point = centroidPointFirstRing;\n}\n\nfunction centroidRingEnd$1() {\n  centroidPointRing(x00$1, y00$1);\n}\n\nfunction centroidPointFirstRing(x, y) {\n  centroidStream$1.point = centroidPointRing;\n  centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);\n}\n\nfunction centroidPointRing(x, y) {\n  var dx = x - x0$3,\n      dy = y - y0$3,\n      z = sqrt(dx * dx + dy * dy);\n\n  X1$1 += z * (x0$3 + x) / 2;\n  Y1$1 += z * (y0$3 + y) / 2;\n  Z1$1 += z;\n\n  z = y0$3 * x - x0$3 * y;\n  X2$1 += z * (x0$3 + x);\n  Y2$1 += z * (y0$3 + y);\n  Z2$1 += z * 3;\n  centroidPoint$1(x0$3 = x, y0$3 = y);\n}\n\nfunction PathContext(context) {\n  this._context = context;\n}\n\nPathContext.prototype = {\n  _radius: 4.5,\n  pointRadius: function(_) {\n    return this._radius = _, this;\n  },\n  polygonStart: function() {\n    this._line = 0;\n  },\n  polygonEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line === 0) this._context.closePath();\n    this._point = NaN;\n  },\n  point: function(x, y) {\n    switch (this._point) {\n      case 0: {\n        this._context.moveTo(x, y);\n        this._point = 1;\n        break;\n      }\n      case 1: {\n        this._context.lineTo(x, y);\n        break;\n      }\n      default: {\n        this._context.moveTo(x + this._radius, y);\n        this._context.arc(x, y, this._radius, 0, tau$3);\n        break;\n      }\n    }\n  },\n  result: noop$2\n};\n\nvar lengthSum$1 = adder(),\n    lengthRing,\n    x00$2,\n    y00$2,\n    x0$4,\n    y0$4;\n\nvar lengthStream$1 = {\n  point: noop$2,\n  lineStart: function() {\n    lengthStream$1.point = lengthPointFirst$1;\n  },\n  lineEnd: function() {\n    if (lengthRing) lengthPoint$1(x00$2, y00$2);\n    lengthStream$1.point = noop$2;\n  },\n  polygonStart: function() {\n    lengthRing = true;\n  },\n  polygonEnd: function() {\n    lengthRing = null;\n  },\n  result: function() {\n    var length = +lengthSum$1;\n    lengthSum$1.reset();\n    return length;\n  }\n};\n\nfunction lengthPointFirst$1(x, y) {\n  lengthStream$1.point = lengthPoint$1;\n  x00$2 = x0$4 = x, y00$2 = y0$4 = y;\n}\n\nfunction lengthPoint$1(x, y) {\n  x0$4 -= x, y0$4 -= y;\n  lengthSum$1.add(sqrt(x0$4 * x0$4 + y0$4 * y0$4));\n  x0$4 = x, y0$4 = y;\n}\n\nfunction PathString() {\n  this._string = [];\n}\n\nPathString.prototype = {\n  _radius: 4.5,\n  _circle: circle$1(4.5),\n  pointRadius: function(_) {\n    if ((_ = +_) !== this._radius) this._radius = _, this._circle = null;\n    return this;\n  },\n  polygonStart: function() {\n    this._line = 0;\n  },\n  polygonEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line === 0) this._string.push(\"Z\");\n    this._point = NaN;\n  },\n  point: function(x, y) {\n    switch (this._point) {\n      case 0: {\n        this._string.push(\"M\", x, \",\", y);\n        this._point = 1;\n        break;\n      }\n      case 1: {\n        this._string.push(\"L\", x, \",\", y);\n        break;\n      }\n      default: {\n        if (this._circle == null) this._circle = circle$1(this._radius);\n        this._string.push(\"M\", x, \",\", y, this._circle);\n        break;\n      }\n    }\n  },\n  result: function() {\n    if (this._string.length) {\n      var result = this._string.join(\"\");\n      this._string = [];\n      return result;\n    } else {\n      return null;\n    }\n  }\n};\n\nfunction circle$1(radius) {\n  return \"m0,\" + radius\n      + \"a\" + radius + \",\" + radius + \" 0 1,1 0,\" + -2 * radius\n      + \"a\" + radius + \",\" + radius + \" 0 1,1 0,\" + 2 * radius\n      + \"z\";\n}\n\nfunction index$1(projection, context) {\n  var pointRadius = 4.5,\n      projectionStream,\n      contextStream;\n\n  function path(object) {\n    if (object) {\n      if (typeof pointRadius === \"function\") contextStream.pointRadius(+pointRadius.apply(this, arguments));\n      geoStream(object, projectionStream(contextStream));\n    }\n    return contextStream.result();\n  }\n\n  path.area = function(object) {\n    geoStream(object, projectionStream(areaStream$1));\n    return areaStream$1.result();\n  };\n\n  path.measure = function(object) {\n    geoStream(object, projectionStream(lengthStream$1));\n    return lengthStream$1.result();\n  };\n\n  path.bounds = function(object) {\n    geoStream(object, projectionStream(boundsStream$1));\n    return boundsStream$1.result();\n  };\n\n  path.centroid = function(object) {\n    geoStream(object, projectionStream(centroidStream$1));\n    return centroidStream$1.result();\n  };\n\n  path.projection = function(_) {\n    return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection;\n  };\n\n  path.context = function(_) {\n    if (!arguments.length) return context;\n    contextStream = _ == null ? (context = null, new PathString) : new PathContext(context = _);\n    if (typeof pointRadius !== \"function\") contextStream.pointRadius(pointRadius);\n    return path;\n  };\n\n  path.pointRadius = function(_) {\n    if (!arguments.length) return pointRadius;\n    pointRadius = typeof _ === \"function\" ? _ : (contextStream.pointRadius(+_), +_);\n    return path;\n  };\n\n  return path.projection(projection).context(context);\n}\n\nfunction transform(methods) {\n  return {\n    stream: transformer(methods)\n  };\n}\n\nfunction transformer(methods) {\n  return function(stream) {\n    var s = new TransformStream;\n    for (var key in methods) s[key] = methods[key];\n    s.stream = stream;\n    return s;\n  };\n}\n\nfunction TransformStream() {}\n\nTransformStream.prototype = {\n  constructor: TransformStream,\n  point: function(x, y) { this.stream.point(x, y); },\n  sphere: function() { this.stream.sphere(); },\n  lineStart: function() { this.stream.lineStart(); },\n  lineEnd: function() { this.stream.lineEnd(); },\n  polygonStart: function() { this.stream.polygonStart(); },\n  polygonEnd: function() { this.stream.polygonEnd(); }\n};\n\nfunction fit(projection, fitBounds, object) {\n  var clip = projection.clipExtent && projection.clipExtent();\n  projection.scale(150).translate([0, 0]);\n  if (clip != null) projection.clipExtent(null);\n  geoStream(object, projection.stream(boundsStream$1));\n  fitBounds(boundsStream$1.result());\n  if (clip != null) projection.clipExtent(clip);\n  return projection;\n}\n\nfunction fitExtent(projection, extent, object) {\n  return fit(projection, function(b) {\n    var w = extent[1][0] - extent[0][0],\n        h = extent[1][1] - extent[0][1],\n        k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),\n        x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,\n        y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;\n    projection.scale(150 * k).translate([x, y]);\n  }, object);\n}\n\nfunction fitSize(projection, size, object) {\n  return fitExtent(projection, [[0, 0], size], object);\n}\n\nfunction fitWidth(projection, width, object) {\n  return fit(projection, function(b) {\n    var w = +width,\n        k = w / (b[1][0] - b[0][0]),\n        x = (w - k * (b[1][0] + b[0][0])) / 2,\n        y = -k * b[0][1];\n    projection.scale(150 * k).translate([x, y]);\n  }, object);\n}\n\nfunction fitHeight(projection, height, object) {\n  return fit(projection, function(b) {\n    var h = +height,\n        k = h / (b[1][1] - b[0][1]),\n        x = -k * b[0][0],\n        y = (h - k * (b[1][1] + b[0][1])) / 2;\n    projection.scale(150 * k).translate([x, y]);\n  }, object);\n}\n\nvar maxDepth = 16, // maximum depth of subdivision\n    cosMinDistance = cos$1(30 * radians); // cos(minimum angular distance)\n\nfunction resample(project, delta2) {\n  return +delta2 ? resample$1(project, delta2) : resampleNone(project);\n}\n\nfunction resampleNone(project) {\n  return transformer({\n    point: function(x, y) {\n      x = project(x, y);\n      this.stream.point(x[0], x[1]);\n    }\n  });\n}\n\nfunction resample$1(project, delta2) {\n\n  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {\n    var dx = x1 - x0,\n        dy = y1 - y0,\n        d2 = dx * dx + dy * dy;\n    if (d2 > 4 * delta2 && depth--) {\n      var a = a0 + a1,\n          b = b0 + b1,\n          c = c0 + c1,\n          m = sqrt(a * a + b * b + c * c),\n          phi2 = asin(c /= m),\n          lambda2 = abs(abs(c) - 1) < epsilon$2 || abs(lambda0 - lambda1) < epsilon$2 ? (lambda0 + lambda1) / 2 : atan2(b, a),\n          p = project(lambda2, phi2),\n          x2 = p[0],\n          y2 = p[1],\n          dx2 = x2 - x0,\n          dy2 = y2 - y0,\n          dz = dy * dx2 - dx * dy2;\n      if (dz * dz / d2 > delta2 // perpendicular projected distance\n          || abs((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end\n          || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance\n        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);\n        stream.point(x2, y2);\n        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);\n      }\n    }\n  }\n  return function(stream) {\n    var lambda00, x00, y00, a00, b00, c00, // first point\n        lambda0, x0, y0, a0, b0, c0; // previous point\n\n    var resampleStream = {\n      point: point,\n      lineStart: lineStart,\n      lineEnd: lineEnd,\n      polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },\n      polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }\n    };\n\n    function point(x, y) {\n      x = project(x, y);\n      stream.point(x[0], x[1]);\n    }\n\n    function lineStart() {\n      x0 = NaN;\n      resampleStream.point = linePoint;\n      stream.lineStart();\n    }\n\n    function linePoint(lambda, phi) {\n      var c = cartesian([lambda, phi]), p = project(lambda, phi);\n      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);\n      stream.point(x0, y0);\n    }\n\n    function lineEnd() {\n      resampleStream.point = point;\n      stream.lineEnd();\n    }\n\n    function ringStart() {\n      lineStart();\n      resampleStream.point = ringPoint;\n      resampleStream.lineEnd = ringEnd;\n    }\n\n    function ringPoint(lambda, phi) {\n      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;\n      resampleStream.point = linePoint;\n    }\n\n    function ringEnd() {\n      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);\n      resampleStream.lineEnd = lineEnd;\n      lineEnd();\n    }\n\n    return resampleStream;\n  };\n}\n\nvar transformRadians = transformer({\n  point: function(x, y) {\n    this.stream.point(x * radians, y * radians);\n  }\n});\n\nfunction transformRotate(rotate) {\n  return transformer({\n    point: function(x, y) {\n      var r = rotate(x, y);\n      return this.stream.point(r[0], r[1]);\n    }\n  });\n}\n\nfunction scaleTranslate(k, dx, dy, sx, sy) {\n  function transform(x, y) {\n    x *= sx; y *= sy;\n    return [dx + k * x, dy - k * y];\n  }\n  transform.invert = function(x, y) {\n    return [(x - dx) / k * sx, (dy - y) / k * sy];\n  };\n  return transform;\n}\n\nfunction scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {\n  var cosAlpha = cos$1(alpha),\n      sinAlpha = sin$1(alpha),\n      a = cosAlpha * k,\n      b = sinAlpha * k,\n      ai = cosAlpha / k,\n      bi = sinAlpha / k,\n      ci = (sinAlpha * dy - cosAlpha * dx) / k,\n      fi = (sinAlpha * dx + cosAlpha * dy) / k;\n  function transform(x, y) {\n    x *= sx; y *= sy;\n    return [a * x - b * y + dx, dy - b * x - a * y];\n  }\n  transform.invert = function(x, y) {\n    return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];\n  };\n  return transform;\n}\n\nfunction projection(project) {\n  return projectionMutator(function() { return project; })();\n}\n\nfunction projectionMutator(projectAt) {\n  var project,\n      k = 150, // scale\n      x = 480, y = 250, // translate\n      lambda = 0, phi = 0, // center\n      deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, // pre-rotate\n      alpha = 0, // post-rotate angle\n      sx = 1, // reflectX\n      sy = 1, // reflectX\n      theta = null, preclip = clipAntimeridian, // pre-clip angle\n      x0 = null, y0, x1, y1, postclip = identity$4, // post-clip extent\n      delta2 = 0.5, // precision\n      projectResample,\n      projectTransform,\n      projectRotateTransform,\n      cache,\n      cacheStream;\n\n  function projection(point) {\n    return projectRotateTransform(point[0] * radians, point[1] * radians);\n  }\n\n  function invert(point) {\n    point = projectRotateTransform.invert(point[0], point[1]);\n    return point && [point[0] * degrees$1, point[1] * degrees$1];\n  }\n\n  projection.stream = function(stream) {\n    return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));\n  };\n\n  projection.preclip = function(_) {\n    return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;\n  };\n\n  projection.postclip = function(_) {\n    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;\n  };\n\n  projection.clipAngle = function(_) {\n    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;\n  };\n\n  projection.clipExtent = function(_) {\n    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];\n  };\n\n  projection.scale = function(_) {\n    return arguments.length ? (k = +_, recenter()) : k;\n  };\n\n  projection.translate = function(_) {\n    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];\n  };\n\n  projection.center = function(_) {\n    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];\n  };\n\n  projection.rotate = function(_) {\n    return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];\n  };\n\n  projection.angle = function(_) {\n    return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees$1;\n  };\n\n  projection.reflectX = function(_) {\n    return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;\n  };\n\n  projection.reflectY = function(_) {\n    return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;\n  };\n\n  projection.precision = function(_) {\n    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);\n  };\n\n  projection.fitExtent = function(extent, object) {\n    return fitExtent(projection, extent, object);\n  };\n\n  projection.fitSize = function(size, object) {\n    return fitSize(projection, size, object);\n  };\n\n  projection.fitWidth = function(width, object) {\n    return fitWidth(projection, width, object);\n  };\n\n  projection.fitHeight = function(height, object) {\n    return fitHeight(projection, height, object);\n  };\n\n  function recenter() {\n    var center = scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),\n        transform = (alpha ? scaleTranslateRotate : scaleTranslate)(k, x - center[0], y - center[1], sx, sy, alpha);\n    rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);\n    projectTransform = compose(project, transform);\n    projectRotateTransform = compose(rotate, projectTransform);\n    projectResample = resample(projectTransform, delta2);\n    return reset();\n  }\n\n  function reset() {\n    cache = cacheStream = null;\n    return projection;\n  }\n\n  return function() {\n    project = projectAt.apply(this, arguments);\n    projection.invert = project.invert && invert;\n    return recenter();\n  };\n}\n\nfunction conicProjection(projectAt) {\n  var phi0 = 0,\n      phi1 = pi$3 / 3,\n      m = projectionMutator(projectAt),\n      p = m(phi0, phi1);\n\n  p.parallels = function(_) {\n    return arguments.length ? m(phi0 = _[0] * radians, phi1 = _[1] * radians) : [phi0 * degrees$1, phi1 * degrees$1];\n  };\n\n  return p;\n}\n\nfunction cylindricalEqualAreaRaw(phi0) {\n  var cosPhi0 = cos$1(phi0);\n\n  function forward(lambda, phi) {\n    return [lambda * cosPhi0, sin$1(phi) / cosPhi0];\n  }\n\n  forward.invert = function(x, y) {\n    return [x / cosPhi0, asin(y * cosPhi0)];\n  };\n\n  return forward;\n}\n\nfunction conicEqualAreaRaw(y0, y1) {\n  var sy0 = sin$1(y0), n = (sy0 + sin$1(y1)) / 2;\n\n  // Are the parallels symmetrical around the Equator?\n  if (abs(n) < epsilon$2) return cylindricalEqualAreaRaw(y0);\n\n  var c = 1 + sy0 * (2 * n - sy0), r0 = sqrt(c) / n;\n\n  function project(x, y) {\n    var r = sqrt(c - 2 * n * sin$1(y)) / n;\n    return [r * sin$1(x *= n), r0 - r * cos$1(x)];\n  }\n\n  project.invert = function(x, y) {\n    var r0y = r0 - y,\n        l = atan2(x, abs(r0y)) * sign(r0y);\n    if (r0y * n < 0)\n      l -= pi$3 * sign(x) * sign(r0y);\n    return [l / n, asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))];\n  };\n\n  return project;\n}\n\nfunction conicEqualArea() {\n  return conicProjection(conicEqualAreaRaw)\n      .scale(155.424)\n      .center([0, 33.6442]);\n}\n\nfunction albers() {\n  return conicEqualArea()\n      .parallels([29.5, 45.5])\n      .scale(1070)\n      .translate([480, 250])\n      .rotate([96, 0])\n      .center([-0.6, 38.7]);\n}\n\n// The projections must have mutually exclusive clip regions on the sphere,\n// as this will avoid emitting interleaving lines and polygons.\nfunction multiplex(streams) {\n  var n = streams.length;\n  return {\n    point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); },\n    sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); },\n    lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); },\n    lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); },\n    polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); },\n    polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); }\n  };\n}\n\n// A composite projection for the United States, configured by default for\n// 960×500. The projection also works quite well at 960×600 if you change the\n// scale to 1285 and adjust the translate accordingly. The set of standard\n// parallels for each region comes from USGS, which is published here:\n// http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers\nfunction albersUsa() {\n  var cache,\n      cacheStream,\n      lower48 = albers(), lower48Point,\n      alaska = conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338\n      hawaii = conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007\n      point, pointStream = {point: function(x, y) { point = [x, y]; }};\n\n  function albersUsa(coordinates) {\n    var x = coordinates[0], y = coordinates[1];\n    return point = null,\n        (lower48Point.point(x, y), point)\n        || (alaskaPoint.point(x, y), point)\n        || (hawaiiPoint.point(x, y), point);\n  }\n\n  albersUsa.invert = function(coordinates) {\n    var k = lower48.scale(),\n        t = lower48.translate(),\n        x = (coordinates[0] - t[0]) / k,\n        y = (coordinates[1] - t[1]) / k;\n    return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska\n        : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii\n        : lower48).invert(coordinates);\n  };\n\n  albersUsa.stream = function(stream) {\n    return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]);\n  };\n\n  albersUsa.precision = function(_) {\n    if (!arguments.length) return lower48.precision();\n    lower48.precision(_), alaska.precision(_), hawaii.precision(_);\n    return reset();\n  };\n\n  albersUsa.scale = function(_) {\n    if (!arguments.length) return lower48.scale();\n    lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_);\n    return albersUsa.translate(lower48.translate());\n  };\n\n  albersUsa.translate = function(_) {\n    if (!arguments.length) return lower48.translate();\n    var k = lower48.scale(), x = +_[0], y = +_[1];\n\n    lower48Point = lower48\n        .translate(_)\n        .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]])\n        .stream(pointStream);\n\n    alaskaPoint = alaska\n        .translate([x - 0.307 * k, y + 0.201 * k])\n        .clipExtent([[x - 0.425 * k + epsilon$2, y + 0.120 * k + epsilon$2], [x - 0.214 * k - epsilon$2, y + 0.234 * k - epsilon$2]])\n        .stream(pointStream);\n\n    hawaiiPoint = hawaii\n        .translate([x - 0.205 * k, y + 0.212 * k])\n        .clipExtent([[x - 0.214 * k + epsilon$2, y + 0.166 * k + epsilon$2], [x - 0.115 * k - epsilon$2, y + 0.234 * k - epsilon$2]])\n        .stream(pointStream);\n\n    return reset();\n  };\n\n  albersUsa.fitExtent = function(extent, object) {\n    return fitExtent(albersUsa, extent, object);\n  };\n\n  albersUsa.fitSize = function(size, object) {\n    return fitSize(albersUsa, size, object);\n  };\n\n  albersUsa.fitWidth = function(width, object) {\n    return fitWidth(albersUsa, width, object);\n  };\n\n  albersUsa.fitHeight = function(height, object) {\n    return fitHeight(albersUsa, height, object);\n  };\n\n  function reset() {\n    cache = cacheStream = null;\n    return albersUsa;\n  }\n\n  return albersUsa.scale(1070);\n}\n\nfunction azimuthalRaw(scale) {\n  return function(x, y) {\n    var cx = cos$1(x),\n        cy = cos$1(y),\n        k = scale(cx * cy);\n    return [\n      k * cy * sin$1(x),\n      k * sin$1(y)\n    ];\n  }\n}\n\nfunction azimuthalInvert(angle) {\n  return function(x, y) {\n    var z = sqrt(x * x + y * y),\n        c = angle(z),\n        sc = sin$1(c),\n        cc = cos$1(c);\n    return [\n      atan2(x * sc, z * cc),\n      asin(z && y * sc / z)\n    ];\n  }\n}\n\nvar azimuthalEqualAreaRaw = azimuthalRaw(function(cxcy) {\n  return sqrt(2 / (1 + cxcy));\n});\n\nazimuthalEqualAreaRaw.invert = azimuthalInvert(function(z) {\n  return 2 * asin(z / 2);\n});\n\nfunction azimuthalEqualArea() {\n  return projection(azimuthalEqualAreaRaw)\n      .scale(124.75)\n      .clipAngle(180 - 1e-3);\n}\n\nvar azimuthalEquidistantRaw = azimuthalRaw(function(c) {\n  return (c = acos(c)) && c / sin$1(c);\n});\n\nazimuthalEquidistantRaw.invert = azimuthalInvert(function(z) {\n  return z;\n});\n\nfunction azimuthalEquidistant() {\n  return projection(azimuthalEquidistantRaw)\n      .scale(79.4188)\n      .clipAngle(180 - 1e-3);\n}\n\nfunction mercatorRaw(lambda, phi) {\n  return [lambda, log(tan((halfPi$2 + phi) / 2))];\n}\n\nmercatorRaw.invert = function(x, y) {\n  return [x, 2 * atan(exp(y)) - halfPi$2];\n};\n\nfunction mercator() {\n  return mercatorProjection(mercatorRaw)\n      .scale(961 / tau$3);\n}\n\nfunction mercatorProjection(project) {\n  var m = projection(project),\n      center = m.center,\n      scale = m.scale,\n      translate = m.translate,\n      clipExtent = m.clipExtent,\n      x0 = null, y0, x1, y1; // clip extent\n\n  m.scale = function(_) {\n    return arguments.length ? (scale(_), reclip()) : scale();\n  };\n\n  m.translate = function(_) {\n    return arguments.length ? (translate(_), reclip()) : translate();\n  };\n\n  m.center = function(_) {\n    return arguments.length ? (center(_), reclip()) : center();\n  };\n\n  m.clipExtent = function(_) {\n    return arguments.length ? ((_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1])), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];\n  };\n\n  function reclip() {\n    var k = pi$3 * scale(),\n        t = m(rotation(m.rotate()).invert([0, 0]));\n    return clipExtent(x0 == null\n        ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw\n        ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]]\n        : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);\n  }\n\n  return reclip();\n}\n\nfunction tany(y) {\n  return tan((halfPi$2 + y) / 2);\n}\n\nfunction conicConformalRaw(y0, y1) {\n  var cy0 = cos$1(y0),\n      n = y0 === y1 ? sin$1(y0) : log(cy0 / cos$1(y1)) / log(tany(y1) / tany(y0)),\n      f = cy0 * pow(tany(y0), n) / n;\n\n  if (!n) return mercatorRaw;\n\n  function project(x, y) {\n    if (f > 0) { if (y < -halfPi$2 + epsilon$2) y = -halfPi$2 + epsilon$2; }\n    else { if (y > halfPi$2 - epsilon$2) y = halfPi$2 - epsilon$2; }\n    var r = f / pow(tany(y), n);\n    return [r * sin$1(n * x), f - r * cos$1(n * x)];\n  }\n\n  project.invert = function(x, y) {\n    var fy = f - y, r = sign(n) * sqrt(x * x + fy * fy),\n      l = atan2(x, abs(fy)) * sign(fy);\n    if (fy * n < 0)\n      l -= pi$3 * sign(x) * sign(fy);\n    return [l / n, 2 * atan(pow(f / r, 1 / n)) - halfPi$2];\n  };\n\n  return project;\n}\n\nfunction conicConformal() {\n  return conicProjection(conicConformalRaw)\n      .scale(109.5)\n      .parallels([30, 30]);\n}\n\nfunction equirectangularRaw(lambda, phi) {\n  return [lambda, phi];\n}\n\nequirectangularRaw.invert = equirectangularRaw;\n\nfunction equirectangular() {\n  return projection(equirectangularRaw)\n      .scale(152.63);\n}\n\nfunction conicEquidistantRaw(y0, y1) {\n  var cy0 = cos$1(y0),\n      n = y0 === y1 ? sin$1(y0) : (cy0 - cos$1(y1)) / (y1 - y0),\n      g = cy0 / n + y0;\n\n  if (abs(n) < epsilon$2) return equirectangularRaw;\n\n  function project(x, y) {\n    var gy = g - y, nx = n * x;\n    return [gy * sin$1(nx), g - gy * cos$1(nx)];\n  }\n\n  project.invert = function(x, y) {\n    var gy = g - y,\n        l = atan2(x, abs(gy)) * sign(gy);\n    if (gy * n < 0)\n      l -= pi$3 * sign(x) * sign(gy);\n    return [l / n, g - sign(n) * sqrt(x * x + gy * gy)];\n  };\n\n  return project;\n}\n\nfunction conicEquidistant() {\n  return conicProjection(conicEquidistantRaw)\n      .scale(131.154)\n      .center([0, 13.9389]);\n}\n\nvar A1 = 1.340264,\n    A2 = -0.081106,\n    A3 = 0.000893,\n    A4 = 0.003796,\n    M = sqrt(3) / 2,\n    iterations = 12;\n\nfunction equalEarthRaw(lambda, phi) {\n  var l = asin(M * sin$1(phi)), l2 = l * l, l6 = l2 * l2 * l2;\n  return [\n    lambda * cos$1(l) / (M * (A1 + 3 * A2 * l2 + l6 * (7 * A3 + 9 * A4 * l2))),\n    l * (A1 + A2 * l2 + l6 * (A3 + A4 * l2))\n  ];\n}\n\nequalEarthRaw.invert = function(x, y) {\n  var l = y, l2 = l * l, l6 = l2 * l2 * l2;\n  for (var i = 0, delta, fy, fpy; i < iterations; ++i) {\n    fy = l * (A1 + A2 * l2 + l6 * (A3 + A4 * l2)) - y;\n    fpy = A1 + 3 * A2 * l2 + l6 * (7 * A3 + 9 * A4 * l2);\n    l -= delta = fy / fpy, l2 = l * l, l6 = l2 * l2 * l2;\n    if (abs(delta) < epsilon2$1) break;\n  }\n  return [\n    M * x * (A1 + 3 * A2 * l2 + l6 * (7 * A3 + 9 * A4 * l2)) / cos$1(l),\n    asin(sin$1(l) / M)\n  ];\n};\n\nfunction equalEarth() {\n  return projection(equalEarthRaw)\n      .scale(177.158);\n}\n\nfunction gnomonicRaw(x, y) {\n  var cy = cos$1(y), k = cos$1(x) * cy;\n  return [cy * sin$1(x) / k, sin$1(y) / k];\n}\n\ngnomonicRaw.invert = azimuthalInvert(atan);\n\nfunction gnomonic() {\n  return projection(gnomonicRaw)\n      .scale(144.049)\n      .clipAngle(60);\n}\n\nfunction identity$5() {\n  var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, // scale, translate and reflect\n      alpha = 0, ca, sa, // angle\n      x0 = null, y0, x1, y1, // clip extent\n      kx = 1, ky = 1,\n      transform = transformer({\n        point: function(x, y) {\n          var p = projection([x, y]);\n          this.stream.point(p[0], p[1]);\n        }\n      }),\n      postclip = identity$4,\n      cache,\n      cacheStream;\n\n  function reset() {\n    kx = k * sx;\n    ky = k * sy;\n    cache = cacheStream = null;\n    return projection;\n  }\n\n  function projection (p) {\n    var x = p[0] * kx, y = p[1] * ky;\n    if (alpha) {\n      var t = y * ca - x * sa;\n      x = x * ca + y * sa;\n      y = t;\n    }    \n    return [x + tx, y + ty];\n  }\n  projection.invert = function(p) {\n    var x = p[0] - tx, y = p[1] - ty;\n    if (alpha) {\n      var t = y * ca + x * sa;\n      x = x * ca - y * sa;\n      y = t;\n    }\n    return [x / kx, y / ky];\n  };\n  projection.stream = function(stream) {\n    return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));\n  };\n  projection.postclip = function(_) {\n    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;\n  };\n  projection.clipExtent = function(_) {\n    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];\n  };\n  projection.scale = function(_) {\n    return arguments.length ? (k = +_, reset()) : k;\n  };\n  projection.translate = function(_) {\n    return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];\n  };\n  projection.angle = function(_) {\n    return arguments.length ? (alpha = _ % 360 * radians, sa = sin$1(alpha), ca = cos$1(alpha), reset()) : alpha * degrees$1;\n  };\n  projection.reflectX = function(_) {\n    return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;\n  };\n  projection.reflectY = function(_) {\n    return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;\n  };\n  projection.fitExtent = function(extent, object) {\n    return fitExtent(projection, extent, object);\n  };\n  projection.fitSize = function(size, object) {\n    return fitSize(projection, size, object);\n  };\n  projection.fitWidth = function(width, object) {\n    return fitWidth(projection, width, object);\n  };\n  projection.fitHeight = function(height, object) {\n    return fitHeight(projection, height, object);\n  };\n\n  return projection;\n}\n\nfunction naturalEarth1Raw(lambda, phi) {\n  var phi2 = phi * phi, phi4 = phi2 * phi2;\n  return [\n    lambda * (0.8707 - 0.131979 * phi2 + phi4 * (-0.013791 + phi4 * (0.003971 * phi2 - 0.001529 * phi4))),\n    phi * (1.007226 + phi2 * (0.015085 + phi4 * (-0.044475 + 0.028874 * phi2 - 0.005916 * phi4)))\n  ];\n}\n\nnaturalEarth1Raw.invert = function(x, y) {\n  var phi = y, i = 25, delta;\n  do {\n    var phi2 = phi * phi, phi4 = phi2 * phi2;\n    phi -= delta = (phi * (1.007226 + phi2 * (0.015085 + phi4 * (-0.044475 + 0.028874 * phi2 - 0.005916 * phi4))) - y) /\n        (1.007226 + phi2 * (0.015085 * 3 + phi4 * (-0.044475 * 7 + 0.028874 * 9 * phi2 - 0.005916 * 11 * phi4)));\n  } while (abs(delta) > epsilon$2 && --i > 0);\n  return [\n    x / (0.8707 + (phi2 = phi * phi) * (-0.131979 + phi2 * (-0.013791 + phi2 * phi2 * phi2 * (0.003971 - 0.001529 * phi2)))),\n    phi\n  ];\n};\n\nfunction naturalEarth1() {\n  return projection(naturalEarth1Raw)\n      .scale(175.295);\n}\n\nfunction orthographicRaw(x, y) {\n  return [cos$1(y) * sin$1(x), sin$1(y)];\n}\n\northographicRaw.invert = azimuthalInvert(asin);\n\nfunction orthographic() {\n  return projection(orthographicRaw)\n      .scale(249.5)\n      .clipAngle(90 + epsilon$2);\n}\n\nfunction stereographicRaw(x, y) {\n  var cy = cos$1(y), k = 1 + cos$1(x) * cy;\n  return [cy * sin$1(x) / k, sin$1(y) / k];\n}\n\nstereographicRaw.invert = azimuthalInvert(function(z) {\n  return 2 * atan(z);\n});\n\nfunction stereographic() {\n  return projection(stereographicRaw)\n      .scale(250)\n      .clipAngle(142);\n}\n\nfunction transverseMercatorRaw(lambda, phi) {\n  return [log(tan((halfPi$2 + phi) / 2)), -lambda];\n}\n\ntransverseMercatorRaw.invert = function(x, y) {\n  return [-y, 2 * atan(exp(x)) - halfPi$2];\n};\n\nfunction transverseMercator() {\n  var m = mercatorProjection(transverseMercatorRaw),\n      center = m.center,\n      rotate = m.rotate;\n\n  m.center = function(_) {\n    return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]);\n  };\n\n  m.rotate = function(_) {\n    return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]);\n  };\n\n  return rotate([0, 0, 90])\n      .scale(159.155);\n}\n\nfunction defaultSeparation(a, b) {\n  return a.parent === b.parent ? 1 : 2;\n}\n\nfunction meanX(children) {\n  return children.reduce(meanXReduce, 0) / children.length;\n}\n\nfunction meanXReduce(x, c) {\n  return x + c.x;\n}\n\nfunction maxY(children) {\n  return 1 + children.reduce(maxYReduce, 0);\n}\n\nfunction maxYReduce(y, c) {\n  return Math.max(y, c.y);\n}\n\nfunction leafLeft(node) {\n  var children;\n  while (children = node.children) node = children[0];\n  return node;\n}\n\nfunction leafRight(node) {\n  var children;\n  while (children = node.children) node = children[children.length - 1];\n  return node;\n}\n\nfunction cluster() {\n  var separation = defaultSeparation,\n      dx = 1,\n      dy = 1,\n      nodeSize = false;\n\n  function cluster(root) {\n    var previousNode,\n        x = 0;\n\n    // First walk, computing the initial x & y values.\n    root.eachAfter(function(node) {\n      var children = node.children;\n      if (children) {\n        node.x = meanX(children);\n        node.y = maxY(children);\n      } else {\n        node.x = previousNode ? x += separation(node, previousNode) : 0;\n        node.y = 0;\n        previousNode = node;\n      }\n    });\n\n    var left = leafLeft(root),\n        right = leafRight(root),\n        x0 = left.x - separation(left, right) / 2,\n        x1 = right.x + separation(right, left) / 2;\n\n    // Second walk, normalizing x & y to the desired size.\n    return root.eachAfter(nodeSize ? function(node) {\n      node.x = (node.x - root.x) * dx;\n      node.y = (root.y - node.y) * dy;\n    } : function(node) {\n      node.x = (node.x - x0) / (x1 - x0) * dx;\n      node.y = (1 - (root.y ? node.y / root.y : 1)) * dy;\n    });\n  }\n\n  cluster.separation = function(x) {\n    return arguments.length ? (separation = x, cluster) : separation;\n  };\n\n  cluster.size = function(x) {\n    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? null : [dx, dy]);\n  };\n\n  cluster.nodeSize = function(x) {\n    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? [dx, dy] : null);\n  };\n\n  return cluster;\n}\n\nfunction count(node) {\n  var sum = 0,\n      children = node.children,\n      i = children && children.length;\n  if (!i) sum = 1;\n  else while (--i >= 0) sum += children[i].value;\n  node.value = sum;\n}\n\nfunction node_count() {\n  return this.eachAfter(count);\n}\n\nfunction node_each(callback) {\n  var node = this, current, next = [node], children, i, n;\n  do {\n    current = next.reverse(), next = [];\n    while (node = current.pop()) {\n      callback(node), children = node.children;\n      if (children) for (i = 0, n = children.length; i < n; ++i) {\n        next.push(children[i]);\n      }\n    }\n  } while (next.length);\n  return this;\n}\n\nfunction node_eachBefore(callback) {\n  var node = this, nodes = [node], children, i;\n  while (node = nodes.pop()) {\n    callback(node), children = node.children;\n    if (children) for (i = children.length - 1; i >= 0; --i) {\n      nodes.push(children[i]);\n    }\n  }\n  return this;\n}\n\nfunction node_eachAfter(callback) {\n  var node = this, nodes = [node], next = [], children, i, n;\n  while (node = nodes.pop()) {\n    next.push(node), children = node.children;\n    if (children) for (i = 0, n = children.length; i < n; ++i) {\n      nodes.push(children[i]);\n    }\n  }\n  while (node = next.pop()) {\n    callback(node);\n  }\n  return this;\n}\n\nfunction node_sum(value) {\n  return this.eachAfter(function(node) {\n    var sum = +value(node.data) || 0,\n        children = node.children,\n        i = children && children.length;\n    while (--i >= 0) sum += children[i].value;\n    node.value = sum;\n  });\n}\n\nfunction node_sort(compare) {\n  return this.eachBefore(function(node) {\n    if (node.children) {\n      node.children.sort(compare);\n    }\n  });\n}\n\nfunction node_path(end) {\n  var start = this,\n      ancestor = leastCommonAncestor(start, end),\n      nodes = [start];\n  while (start !== ancestor) {\n    start = start.parent;\n    nodes.push(start);\n  }\n  var k = nodes.length;\n  while (end !== ancestor) {\n    nodes.splice(k, 0, end);\n    end = end.parent;\n  }\n  return nodes;\n}\n\nfunction leastCommonAncestor(a, b) {\n  if (a === b) return a;\n  var aNodes = a.ancestors(),\n      bNodes = b.ancestors(),\n      c = null;\n  a = aNodes.pop();\n  b = bNodes.pop();\n  while (a === b) {\n    c = a;\n    a = aNodes.pop();\n    b = bNodes.pop();\n  }\n  return c;\n}\n\nfunction node_ancestors() {\n  var node = this, nodes = [node];\n  while (node = node.parent) {\n    nodes.push(node);\n  }\n  return nodes;\n}\n\nfunction node_descendants() {\n  var nodes = [];\n  this.each(function(node) {\n    nodes.push(node);\n  });\n  return nodes;\n}\n\nfunction node_leaves() {\n  var leaves = [];\n  this.eachBefore(function(node) {\n    if (!node.children) {\n      leaves.push(node);\n    }\n  });\n  return leaves;\n}\n\nfunction node_links() {\n  var root = this, links = [];\n  root.each(function(node) {\n    if (node !== root) { // Don’t include the root’s parent, if any.\n      links.push({source: node.parent, target: node});\n    }\n  });\n  return links;\n}\n\nfunction hierarchy(data, children) {\n  var root = new Node(data),\n      valued = +data.value && (root.value = data.value),\n      node,\n      nodes = [root],\n      child,\n      childs,\n      i,\n      n;\n\n  if (children == null) children = defaultChildren;\n\n  while (node = nodes.pop()) {\n    if (valued) node.value = +node.data.value;\n    if ((childs = children(node.data)) && (n = childs.length)) {\n      node.children = new Array(n);\n      for (i = n - 1; i >= 0; --i) {\n        nodes.push(child = node.children[i] = new Node(childs[i]));\n        child.parent = node;\n        child.depth = node.depth + 1;\n      }\n    }\n  }\n\n  return root.eachBefore(computeHeight);\n}\n\nfunction node_copy() {\n  return hierarchy(this).eachBefore(copyData);\n}\n\nfunction defaultChildren(d) {\n  return d.children;\n}\n\nfunction copyData(node) {\n  node.data = node.data.data;\n}\n\nfunction computeHeight(node) {\n  var height = 0;\n  do node.height = height;\n  while ((node = node.parent) && (node.height < ++height));\n}\n\nfunction Node(data) {\n  this.data = data;\n  this.depth =\n  this.height = 0;\n  this.parent = null;\n}\n\nNode.prototype = hierarchy.prototype = {\n  constructor: Node,\n  count: node_count,\n  each: node_each,\n  eachAfter: node_eachAfter,\n  eachBefore: node_eachBefore,\n  sum: node_sum,\n  sort: node_sort,\n  path: node_path,\n  ancestors: node_ancestors,\n  descendants: node_descendants,\n  leaves: node_leaves,\n  links: node_links,\n  copy: node_copy\n};\n\nvar slice$4 = Array.prototype.slice;\n\nfunction shuffle$1(array) {\n  var m = array.length,\n      t,\n      i;\n\n  while (m) {\n    i = Math.random() * m-- | 0;\n    t = array[m];\n    array[m] = array[i];\n    array[i] = t;\n  }\n\n  return array;\n}\n\nfunction enclose(circles) {\n  var i = 0, n = (circles = shuffle$1(slice$4.call(circles))).length, B = [], p, e;\n\n  while (i < n) {\n    p = circles[i];\n    if (e && enclosesWeak(e, p)) ++i;\n    else e = encloseBasis(B = extendBasis(B, p)), i = 0;\n  }\n\n  return e;\n}\n\nfunction extendBasis(B, p) {\n  var i, j;\n\n  if (enclosesWeakAll(p, B)) return [p];\n\n  // If we get here then B must have at least one element.\n  for (i = 0; i < B.length; ++i) {\n    if (enclosesNot(p, B[i])\n        && enclosesWeakAll(encloseBasis2(B[i], p), B)) {\n      return [B[i], p];\n    }\n  }\n\n  // If we get here then B must have at least two elements.\n  for (i = 0; i < B.length - 1; ++i) {\n    for (j = i + 1; j < B.length; ++j) {\n      if (enclosesNot(encloseBasis2(B[i], B[j]), p)\n          && enclosesNot(encloseBasis2(B[i], p), B[j])\n          && enclosesNot(encloseBasis2(B[j], p), B[i])\n          && enclosesWeakAll(encloseBasis3(B[i], B[j], p), B)) {\n        return [B[i], B[j], p];\n      }\n    }\n  }\n\n  // If we get here then something is very wrong.\n  throw new Error;\n}\n\nfunction enclosesNot(a, b) {\n  var dr = a.r - b.r, dx = b.x - a.x, dy = b.y - a.y;\n  return dr < 0 || dr * dr < dx * dx + dy * dy;\n}\n\nfunction enclosesWeak(a, b) {\n  var dr = a.r - b.r + 1e-6, dx = b.x - a.x, dy = b.y - a.y;\n  return dr > 0 && dr * dr > dx * dx + dy * dy;\n}\n\nfunction enclosesWeakAll(a, B) {\n  for (var i = 0; i < B.length; ++i) {\n    if (!enclosesWeak(a, B[i])) {\n      return false;\n    }\n  }\n  return true;\n}\n\nfunction encloseBasis(B) {\n  switch (B.length) {\n    case 1: return encloseBasis1(B[0]);\n    case 2: return encloseBasis2(B[0], B[1]);\n    case 3: return encloseBasis3(B[0], B[1], B[2]);\n  }\n}\n\nfunction encloseBasis1(a) {\n  return {\n    x: a.x,\n    y: a.y,\n    r: a.r\n  };\n}\n\nfunction encloseBasis2(a, b) {\n  var x1 = a.x, y1 = a.y, r1 = a.r,\n      x2 = b.x, y2 = b.y, r2 = b.r,\n      x21 = x2 - x1, y21 = y2 - y1, r21 = r2 - r1,\n      l = Math.sqrt(x21 * x21 + y21 * y21);\n  return {\n    x: (x1 + x2 + x21 / l * r21) / 2,\n    y: (y1 + y2 + y21 / l * r21) / 2,\n    r: (l + r1 + r2) / 2\n  };\n}\n\nfunction encloseBasis3(a, b, c) {\n  var x1 = a.x, y1 = a.y, r1 = a.r,\n      x2 = b.x, y2 = b.y, r2 = b.r,\n      x3 = c.x, y3 = c.y, r3 = c.r,\n      a2 = x1 - x2,\n      a3 = x1 - x3,\n      b2 = y1 - y2,\n      b3 = y1 - y3,\n      c2 = r2 - r1,\n      c3 = r3 - r1,\n      d1 = x1 * x1 + y1 * y1 - r1 * r1,\n      d2 = d1 - x2 * x2 - y2 * y2 + r2 * r2,\n      d3 = d1 - x3 * x3 - y3 * y3 + r3 * r3,\n      ab = a3 * b2 - a2 * b3,\n      xa = (b2 * d3 - b3 * d2) / (ab * 2) - x1,\n      xb = (b3 * c2 - b2 * c3) / ab,\n      ya = (a3 * d2 - a2 * d3) / (ab * 2) - y1,\n      yb = (a2 * c3 - a3 * c2) / ab,\n      A = xb * xb + yb * yb - 1,\n      B = 2 * (r1 + xa * xb + ya * yb),\n      C = xa * xa + ya * ya - r1 * r1,\n      r = -(A ? (B + Math.sqrt(B * B - 4 * A * C)) / (2 * A) : C / B);\n  return {\n    x: x1 + xa + xb * r,\n    y: y1 + ya + yb * r,\n    r: r\n  };\n}\n\nfunction place(b, a, c) {\n  var dx = b.x - a.x, x, a2,\n      dy = b.y - a.y, y, b2,\n      d2 = dx * dx + dy * dy;\n  if (d2) {\n    a2 = a.r + c.r, a2 *= a2;\n    b2 = b.r + c.r, b2 *= b2;\n    if (a2 > b2) {\n      x = (d2 + b2 - a2) / (2 * d2);\n      y = Math.sqrt(Math.max(0, b2 / d2 - x * x));\n      c.x = b.x - x * dx - y * dy;\n      c.y = b.y - x * dy + y * dx;\n    } else {\n      x = (d2 + a2 - b2) / (2 * d2);\n      y = Math.sqrt(Math.max(0, a2 / d2 - x * x));\n      c.x = a.x + x * dx - y * dy;\n      c.y = a.y + x * dy + y * dx;\n    }\n  } else {\n    c.x = a.x + c.r;\n    c.y = a.y;\n  }\n}\n\nfunction intersects(a, b) {\n  var dr = a.r + b.r - 1e-6, dx = b.x - a.x, dy = b.y - a.y;\n  return dr > 0 && dr * dr > dx * dx + dy * dy;\n}\n\nfunction score(node) {\n  var a = node._,\n      b = node.next._,\n      ab = a.r + b.r,\n      dx = (a.x * b.r + b.x * a.r) / ab,\n      dy = (a.y * b.r + b.y * a.r) / ab;\n  return dx * dx + dy * dy;\n}\n\nfunction Node$1(circle) {\n  this._ = circle;\n  this.next = null;\n  this.previous = null;\n}\n\nfunction packEnclose(circles) {\n  if (!(n = circles.length)) return 0;\n\n  var a, b, c, n, aa, ca, i, j, k, sj, sk;\n\n  // Place the first circle.\n  a = circles[0], a.x = 0, a.y = 0;\n  if (!(n > 1)) return a.r;\n\n  // Place the second circle.\n  b = circles[1], a.x = -b.r, b.x = a.r, b.y = 0;\n  if (!(n > 2)) return a.r + b.r;\n\n  // Place the third circle.\n  place(b, a, c = circles[2]);\n\n  // Initialize the front-chain using the first three circles a, b and c.\n  a = new Node$1(a), b = new Node$1(b), c = new Node$1(c);\n  a.next = c.previous = b;\n  b.next = a.previous = c;\n  c.next = b.previous = a;\n\n  // Attempt to place each remaining circle…\n  pack: for (i = 3; i < n; ++i) {\n    place(a._, b._, c = circles[i]), c = new Node$1(c);\n\n    // Find the closest intersecting circle on the front-chain, if any.\n    // “Closeness” is determined by linear distance along the front-chain.\n    // “Ahead” or “behind” is likewise determined by linear distance.\n    j = b.next, k = a.previous, sj = b._.r, sk = a._.r;\n    do {\n      if (sj <= sk) {\n        if (intersects(j._, c._)) {\n          b = j, a.next = b, b.previous = a, --i;\n          continue pack;\n        }\n        sj += j._.r, j = j.next;\n      } else {\n        if (intersects(k._, c._)) {\n          a = k, a.next = b, b.previous = a, --i;\n          continue pack;\n        }\n        sk += k._.r, k = k.previous;\n      }\n    } while (j !== k.next);\n\n    // Success! Insert the new circle c between a and b.\n    c.previous = a, c.next = b, a.next = b.previous = b = c;\n\n    // Compute the new closest circle pair to the centroid.\n    aa = score(a);\n    while ((c = c.next) !== b) {\n      if ((ca = score(c)) < aa) {\n        a = c, aa = ca;\n      }\n    }\n    b = a.next;\n  }\n\n  // Compute the enclosing circle of the front chain.\n  a = [b._], c = b; while ((c = c.next) !== b) a.push(c._); c = enclose(a);\n\n  // Translate the circles to put the enclosing circle around the origin.\n  for (i = 0; i < n; ++i) a = circles[i], a.x -= c.x, a.y -= c.y;\n\n  return c.r;\n}\n\nfunction siblings(circles) {\n  packEnclose(circles);\n  return circles;\n}\n\nfunction optional(f) {\n  return f == null ? null : required(f);\n}\n\nfunction required(f) {\n  if (typeof f !== \"function\") throw new Error;\n  return f;\n}\n\nfunction constantZero() {\n  return 0;\n}\n\nfunction constant$9(x) {\n  return function() {\n    return x;\n  };\n}\n\nfunction defaultRadius$1(d) {\n  return Math.sqrt(d.value);\n}\n\nfunction index$2() {\n  var radius = null,\n      dx = 1,\n      dy = 1,\n      padding = constantZero;\n\n  function pack(root) {\n    root.x = dx / 2, root.y = dy / 2;\n    if (radius) {\n      root.eachBefore(radiusLeaf(radius))\n          .eachAfter(packChildren(padding, 0.5))\n          .eachBefore(translateChild(1));\n    } else {\n      root.eachBefore(radiusLeaf(defaultRadius$1))\n          .eachAfter(packChildren(constantZero, 1))\n          .eachAfter(packChildren(padding, root.r / Math.min(dx, dy)))\n          .eachBefore(translateChild(Math.min(dx, dy) / (2 * root.r)));\n    }\n    return root;\n  }\n\n  pack.radius = function(x) {\n    return arguments.length ? (radius = optional(x), pack) : radius;\n  };\n\n  pack.size = function(x) {\n    return arguments.length ? (dx = +x[0], dy = +x[1], pack) : [dx, dy];\n  };\n\n  pack.padding = function(x) {\n    return arguments.length ? (padding = typeof x === \"function\" ? x : constant$9(+x), pack) : padding;\n  };\n\n  return pack;\n}\n\nfunction radiusLeaf(radius) {\n  return function(node) {\n    if (!node.children) {\n      node.r = Math.max(0, +radius(node) || 0);\n    }\n  };\n}\n\nfunction packChildren(padding, k) {\n  return function(node) {\n    if (children = node.children) {\n      var children,\n          i,\n          n = children.length,\n          r = padding(node) * k || 0,\n          e;\n\n      if (r) for (i = 0; i < n; ++i) children[i].r += r;\n      e = packEnclose(children);\n      if (r) for (i = 0; i < n; ++i) children[i].r -= r;\n      node.r = e + r;\n    }\n  };\n}\n\nfunction translateChild(k) {\n  return function(node) {\n    var parent = node.parent;\n    node.r *= k;\n    if (parent) {\n      node.x = parent.x + k * node.x;\n      node.y = parent.y + k * node.y;\n    }\n  };\n}\n\nfunction roundNode(node) {\n  node.x0 = Math.round(node.x0);\n  node.y0 = Math.round(node.y0);\n  node.x1 = Math.round(node.x1);\n  node.y1 = Math.round(node.y1);\n}\n\nfunction treemapDice(parent, x0, y0, x1, y1) {\n  var nodes = parent.children,\n      node,\n      i = -1,\n      n = nodes.length,\n      k = parent.value && (x1 - x0) / parent.value;\n\n  while (++i < n) {\n    node = nodes[i], node.y0 = y0, node.y1 = y1;\n    node.x0 = x0, node.x1 = x0 += node.value * k;\n  }\n}\n\nfunction partition() {\n  var dx = 1,\n      dy = 1,\n      padding = 0,\n      round = false;\n\n  function partition(root) {\n    var n = root.height + 1;\n    root.x0 =\n    root.y0 = padding;\n    root.x1 = dx;\n    root.y1 = dy / n;\n    root.eachBefore(positionNode(dy, n));\n    if (round) root.eachBefore(roundNode);\n    return root;\n  }\n\n  function positionNode(dy, n) {\n    return function(node) {\n      if (node.children) {\n        treemapDice(node, node.x0, dy * (node.depth + 1) / n, node.x1, dy * (node.depth + 2) / n);\n      }\n      var x0 = node.x0,\n          y0 = node.y0,\n          x1 = node.x1 - padding,\n          y1 = node.y1 - padding;\n      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;\n      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;\n      node.x0 = x0;\n      node.y0 = y0;\n      node.x1 = x1;\n      node.y1 = y1;\n    };\n  }\n\n  partition.round = function(x) {\n    return arguments.length ? (round = !!x, partition) : round;\n  };\n\n  partition.size = function(x) {\n    return arguments.length ? (dx = +x[0], dy = +x[1], partition) : [dx, dy];\n  };\n\n  partition.padding = function(x) {\n    return arguments.length ? (padding = +x, partition) : padding;\n  };\n\n  return partition;\n}\n\nvar keyPrefix$1 = \"$\", // Protect against keys like “__proto__”.\n    preroot = {depth: -1},\n    ambiguous = {};\n\nfunction defaultId(d) {\n  return d.id;\n}\n\nfunction defaultParentId(d) {\n  return d.parentId;\n}\n\nfunction stratify() {\n  var id = defaultId,\n      parentId = defaultParentId;\n\n  function stratify(data) {\n    var d,\n        i,\n        n = data.length,\n        root,\n        parent,\n        node,\n        nodes = new Array(n),\n        nodeId,\n        nodeKey,\n        nodeByKey = {};\n\n    for (i = 0; i < n; ++i) {\n      d = data[i], node = nodes[i] = new Node(d);\n      if ((nodeId = id(d, i, data)) != null && (nodeId += \"\")) {\n        nodeKey = keyPrefix$1 + (node.id = nodeId);\n        nodeByKey[nodeKey] = nodeKey in nodeByKey ? ambiguous : node;\n      }\n    }\n\n    for (i = 0; i < n; ++i) {\n      node = nodes[i], nodeId = parentId(data[i], i, data);\n      if (nodeId == null || !(nodeId += \"\")) {\n        if (root) throw new Error(\"multiple roots\");\n        root = node;\n      } else {\n        parent = nodeByKey[keyPrefix$1 + nodeId];\n        if (!parent) throw new Error(\"missing: \" + nodeId);\n        if (parent === ambiguous) throw new Error(\"ambiguous: \" + nodeId);\n        if (parent.children) parent.children.push(node);\n        else parent.children = [node];\n        node.parent = parent;\n      }\n    }\n\n    if (!root) throw new Error(\"no root\");\n    root.parent = preroot;\n    root.eachBefore(function(node) { node.depth = node.parent.depth + 1; --n; }).eachBefore(computeHeight);\n    root.parent = null;\n    if (n > 0) throw new Error(\"cycle\");\n\n    return root;\n  }\n\n  stratify.id = function(x) {\n    return arguments.length ? (id = required(x), stratify) : id;\n  };\n\n  stratify.parentId = function(x) {\n    return arguments.length ? (parentId = required(x), stratify) : parentId;\n  };\n\n  return stratify;\n}\n\nfunction defaultSeparation$1(a, b) {\n  return a.parent === b.parent ? 1 : 2;\n}\n\n// function radialSeparation(a, b) {\n//   return (a.parent === b.parent ? 1 : 2) / a.depth;\n// }\n\n// This function is used to traverse the left contour of a subtree (or\n// subforest). It returns the successor of v on this contour. This successor is\n// either given by the leftmost child of v or by the thread of v. The function\n// returns null if and only if v is on the highest level of its subtree.\nfunction nextLeft(v) {\n  var children = v.children;\n  return children ? children[0] : v.t;\n}\n\n// This function works analogously to nextLeft.\nfunction nextRight(v) {\n  var children = v.children;\n  return children ? children[children.length - 1] : v.t;\n}\n\n// Shifts the current subtree rooted at w+. This is done by increasing\n// prelim(w+) and mod(w+) by shift.\nfunction moveSubtree(wm, wp, shift) {\n  var change = shift / (wp.i - wm.i);\n  wp.c -= change;\n  wp.s += shift;\n  wm.c += change;\n  wp.z += shift;\n  wp.m += shift;\n}\n\n// All other shifts, applied to the smaller subtrees between w- and w+, are\n// performed by this function. To prepare the shifts, we have to adjust\n// change(w+), shift(w+), and change(w-).\nfunction executeShifts(v) {\n  var shift = 0,\n      change = 0,\n      children = v.children,\n      i = children.length,\n      w;\n  while (--i >= 0) {\n    w = children[i];\n    w.z += shift;\n    w.m += shift;\n    shift += w.s + (change += w.c);\n  }\n}\n\n// If vi-’s ancestor is a sibling of v, returns vi-’s ancestor. Otherwise,\n// returns the specified (default) ancestor.\nfunction nextAncestor(vim, v, ancestor) {\n  return vim.a.parent === v.parent ? vim.a : ancestor;\n}\n\nfunction TreeNode(node, i) {\n  this._ = node;\n  this.parent = null;\n  this.children = null;\n  this.A = null; // default ancestor\n  this.a = this; // ancestor\n  this.z = 0; // prelim\n  this.m = 0; // mod\n  this.c = 0; // change\n  this.s = 0; // shift\n  this.t = null; // thread\n  this.i = i; // number\n}\n\nTreeNode.prototype = Object.create(Node.prototype);\n\nfunction treeRoot(root) {\n  var tree = new TreeNode(root, 0),\n      node,\n      nodes = [tree],\n      child,\n      children,\n      i,\n      n;\n\n  while (node = nodes.pop()) {\n    if (children = node._.children) {\n      node.children = new Array(n = children.length);\n      for (i = n - 1; i >= 0; --i) {\n        nodes.push(child = node.children[i] = new TreeNode(children[i], i));\n        child.parent = node;\n      }\n    }\n  }\n\n  (tree.parent = new TreeNode(null, 0)).children = [tree];\n  return tree;\n}\n\n// Node-link tree diagram using the Reingold-Tilford \"tidy\" algorithm\nfunction tree() {\n  var separation = defaultSeparation$1,\n      dx = 1,\n      dy = 1,\n      nodeSize = null;\n\n  function tree(root) {\n    var t = treeRoot(root);\n\n    // Compute the layout using Buchheim et al.’s algorithm.\n    t.eachAfter(firstWalk), t.parent.m = -t.z;\n    t.eachBefore(secondWalk);\n\n    // If a fixed node size is specified, scale x and y.\n    if (nodeSize) root.eachBefore(sizeNode);\n\n    // If a fixed tree size is specified, scale x and y based on the extent.\n    // Compute the left-most, right-most, and depth-most nodes for extents.\n    else {\n      var left = root,\n          right = root,\n          bottom = root;\n      root.eachBefore(function(node) {\n        if (node.x < left.x) left = node;\n        if (node.x > right.x) right = node;\n        if (node.depth > bottom.depth) bottom = node;\n      });\n      var s = left === right ? 1 : separation(left, right) / 2,\n          tx = s - left.x,\n          kx = dx / (right.x + s + tx),\n          ky = dy / (bottom.depth || 1);\n      root.eachBefore(function(node) {\n        node.x = (node.x + tx) * kx;\n        node.y = node.depth * ky;\n      });\n    }\n\n    return root;\n  }\n\n  // Computes a preliminary x-coordinate for v. Before that, FIRST WALK is\n  // applied recursively to the children of v, as well as the function\n  // APPORTION. After spacing out the children by calling EXECUTE SHIFTS, the\n  // node v is placed to the midpoint of its outermost children.\n  function firstWalk(v) {\n    var children = v.children,\n        siblings = v.parent.children,\n        w = v.i ? siblings[v.i - 1] : null;\n    if (children) {\n      executeShifts(v);\n      var midpoint = (children[0].z + children[children.length - 1].z) / 2;\n      if (w) {\n        v.z = w.z + separation(v._, w._);\n        v.m = v.z - midpoint;\n      } else {\n        v.z = midpoint;\n      }\n    } else if (w) {\n      v.z = w.z + separation(v._, w._);\n    }\n    v.parent.A = apportion(v, w, v.parent.A || siblings[0]);\n  }\n\n  // Computes all real x-coordinates by summing up the modifiers recursively.\n  function secondWalk(v) {\n    v._.x = v.z + v.parent.m;\n    v.m += v.parent.m;\n  }\n\n  // The core of the algorithm. Here, a new subtree is combined with the\n  // previous subtrees. Threads are used to traverse the inside and outside\n  // contours of the left and right subtree up to the highest common level. The\n  // vertices used for the traversals are vi+, vi-, vo-, and vo+, where the\n  // superscript o means outside and i means inside, the subscript - means left\n  // subtree and + means right subtree. For summing up the modifiers along the\n  // contour, we use respective variables si+, si-, so-, and so+. Whenever two\n  // nodes of the inside contours conflict, we compute the left one of the\n  // greatest uncommon ancestors using the function ANCESTOR and call MOVE\n  // SUBTREE to shift the subtree and prepare the shifts of smaller subtrees.\n  // Finally, we add a new thread (if necessary).\n  function apportion(v, w, ancestor) {\n    if (w) {\n      var vip = v,\n          vop = v,\n          vim = w,\n          vom = vip.parent.children[0],\n          sip = vip.m,\n          sop = vop.m,\n          sim = vim.m,\n          som = vom.m,\n          shift;\n      while (vim = nextRight(vim), vip = nextLeft(vip), vim && vip) {\n        vom = nextLeft(vom);\n        vop = nextRight(vop);\n        vop.a = v;\n        shift = vim.z + sim - vip.z - sip + separation(vim._, vip._);\n        if (shift > 0) {\n          moveSubtree(nextAncestor(vim, v, ancestor), v, shift);\n          sip += shift;\n          sop += shift;\n        }\n        sim += vim.m;\n        sip += vip.m;\n        som += vom.m;\n        sop += vop.m;\n      }\n      if (vim && !nextRight(vop)) {\n        vop.t = vim;\n        vop.m += sim - sop;\n      }\n      if (vip && !nextLeft(vom)) {\n        vom.t = vip;\n        vom.m += sip - som;\n        ancestor = v;\n      }\n    }\n    return ancestor;\n  }\n\n  function sizeNode(node) {\n    node.x *= dx;\n    node.y = node.depth * dy;\n  }\n\n  tree.separation = function(x) {\n    return arguments.length ? (separation = x, tree) : separation;\n  };\n\n  tree.size = function(x) {\n    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], tree) : (nodeSize ? null : [dx, dy]);\n  };\n\n  tree.nodeSize = function(x) {\n    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], tree) : (nodeSize ? [dx, dy] : null);\n  };\n\n  return tree;\n}\n\nfunction treemapSlice(parent, x0, y0, x1, y1) {\n  var nodes = parent.children,\n      node,\n      i = -1,\n      n = nodes.length,\n      k = parent.value && (y1 - y0) / parent.value;\n\n  while (++i < n) {\n    node = nodes[i], node.x0 = x0, node.x1 = x1;\n    node.y0 = y0, node.y1 = y0 += node.value * k;\n  }\n}\n\nvar phi = (1 + Math.sqrt(5)) / 2;\n\nfunction squarifyRatio(ratio, parent, x0, y0, x1, y1) {\n  var rows = [],\n      nodes = parent.children,\n      row,\n      nodeValue,\n      i0 = 0,\n      i1 = 0,\n      n = nodes.length,\n      dx, dy,\n      value = parent.value,\n      sumValue,\n      minValue,\n      maxValue,\n      newRatio,\n      minRatio,\n      alpha,\n      beta;\n\n  while (i0 < n) {\n    dx = x1 - x0, dy = y1 - y0;\n\n    // Find the next non-empty node.\n    do sumValue = nodes[i1++].value; while (!sumValue && i1 < n);\n    minValue = maxValue = sumValue;\n    alpha = Math.max(dy / dx, dx / dy) / (value * ratio);\n    beta = sumValue * sumValue * alpha;\n    minRatio = Math.max(maxValue / beta, beta / minValue);\n\n    // Keep adding nodes while the aspect ratio maintains or improves.\n    for (; i1 < n; ++i1) {\n      sumValue += nodeValue = nodes[i1].value;\n      if (nodeValue < minValue) minValue = nodeValue;\n      if (nodeValue > maxValue) maxValue = nodeValue;\n      beta = sumValue * sumValue * alpha;\n      newRatio = Math.max(maxValue / beta, beta / minValue);\n      if (newRatio > minRatio) { sumValue -= nodeValue; break; }\n      minRatio = newRatio;\n    }\n\n    // Position and record the row orientation.\n    rows.push(row = {value: sumValue, dice: dx < dy, children: nodes.slice(i0, i1)});\n    if (row.dice) treemapDice(row, x0, y0, x1, value ? y0 += dy * sumValue / value : y1);\n    else treemapSlice(row, x0, y0, value ? x0 += dx * sumValue / value : x1, y1);\n    value -= sumValue, i0 = i1;\n  }\n\n  return rows;\n}\n\nvar squarify = (function custom(ratio) {\n\n  function squarify(parent, x0, y0, x1, y1) {\n    squarifyRatio(ratio, parent, x0, y0, x1, y1);\n  }\n\n  squarify.ratio = function(x) {\n    return custom((x = +x) > 1 ? x : 1);\n  };\n\n  return squarify;\n})(phi);\n\nfunction index$3() {\n  var tile = squarify,\n      round = false,\n      dx = 1,\n      dy = 1,\n      paddingStack = [0],\n      paddingInner = constantZero,\n      paddingTop = constantZero,\n      paddingRight = constantZero,\n      paddingBottom = constantZero,\n      paddingLeft = constantZero;\n\n  function treemap(root) {\n    root.x0 =\n    root.y0 = 0;\n    root.x1 = dx;\n    root.y1 = dy;\n    root.eachBefore(positionNode);\n    paddingStack = [0];\n    if (round) root.eachBefore(roundNode);\n    return root;\n  }\n\n  function positionNode(node) {\n    var p = paddingStack[node.depth],\n        x0 = node.x0 + p,\n        y0 = node.y0 + p,\n        x1 = node.x1 - p,\n        y1 = node.y1 - p;\n    if (x1 < x0) x0 = x1 = (x0 + x1) / 2;\n    if (y1 < y0) y0 = y1 = (y0 + y1) / 2;\n    node.x0 = x0;\n    node.y0 = y0;\n    node.x1 = x1;\n    node.y1 = y1;\n    if (node.children) {\n      p = paddingStack[node.depth + 1] = paddingInner(node) / 2;\n      x0 += paddingLeft(node) - p;\n      y0 += paddingTop(node) - p;\n      x1 -= paddingRight(node) - p;\n      y1 -= paddingBottom(node) - p;\n      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;\n      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;\n      tile(node, x0, y0, x1, y1);\n    }\n  }\n\n  treemap.round = function(x) {\n    return arguments.length ? (round = !!x, treemap) : round;\n  };\n\n  treemap.size = function(x) {\n    return arguments.length ? (dx = +x[0], dy = +x[1], treemap) : [dx, dy];\n  };\n\n  treemap.tile = function(x) {\n    return arguments.length ? (tile = required(x), treemap) : tile;\n  };\n\n  treemap.padding = function(x) {\n    return arguments.length ? treemap.paddingInner(x).paddingOuter(x) : treemap.paddingInner();\n  };\n\n  treemap.paddingInner = function(x) {\n    return arguments.length ? (paddingInner = typeof x === \"function\" ? x : constant$9(+x), treemap) : paddingInner;\n  };\n\n  treemap.paddingOuter = function(x) {\n    return arguments.length ? treemap.paddingTop(x).paddingRight(x).paddingBottom(x).paddingLeft(x) : treemap.paddingTop();\n  };\n\n  treemap.paddingTop = function(x) {\n    return arguments.length ? (paddingTop = typeof x === \"function\" ? x : constant$9(+x), treemap) : paddingTop;\n  };\n\n  treemap.paddingRight = function(x) {\n    return arguments.length ? (paddingRight = typeof x === \"function\" ? x : constant$9(+x), treemap) : paddingRight;\n  };\n\n  treemap.paddingBottom = function(x) {\n    return arguments.length ? (paddingBottom = typeof x === \"function\" ? x : constant$9(+x), treemap) : paddingBottom;\n  };\n\n  treemap.paddingLeft = function(x) {\n    return arguments.length ? (paddingLeft = typeof x === \"function\" ? x : constant$9(+x), treemap) : paddingLeft;\n  };\n\n  return treemap;\n}\n\nfunction binary(parent, x0, y0, x1, y1) {\n  var nodes = parent.children,\n      i, n = nodes.length,\n      sum, sums = new Array(n + 1);\n\n  for (sums[0] = sum = i = 0; i < n; ++i) {\n    sums[i + 1] = sum += nodes[i].value;\n  }\n\n  partition(0, n, parent.value, x0, y0, x1, y1);\n\n  function partition(i, j, value, x0, y0, x1, y1) {\n    if (i >= j - 1) {\n      var node = nodes[i];\n      node.x0 = x0, node.y0 = y0;\n      node.x1 = x1, node.y1 = y1;\n      return;\n    }\n\n    var valueOffset = sums[i],\n        valueTarget = (value / 2) + valueOffset,\n        k = i + 1,\n        hi = j - 1;\n\n    while (k < hi) {\n      var mid = k + hi >>> 1;\n      if (sums[mid] < valueTarget) k = mid + 1;\n      else hi = mid;\n    }\n\n    if ((valueTarget - sums[k - 1]) < (sums[k] - valueTarget) && i + 1 < k) --k;\n\n    var valueLeft = sums[k] - valueOffset,\n        valueRight = value - valueLeft;\n\n    if ((x1 - x0) > (y1 - y0)) {\n      var xk = (x0 * valueRight + x1 * valueLeft) / value;\n      partition(i, k, valueLeft, x0, y0, xk, y1);\n      partition(k, j, valueRight, xk, y0, x1, y1);\n    } else {\n      var yk = (y0 * valueRight + y1 * valueLeft) / value;\n      partition(i, k, valueLeft, x0, y0, x1, yk);\n      partition(k, j, valueRight, x0, yk, x1, y1);\n    }\n  }\n}\n\nfunction sliceDice(parent, x0, y0, x1, y1) {\n  (parent.depth & 1 ? treemapSlice : treemapDice)(parent, x0, y0, x1, y1);\n}\n\nvar resquarify = (function custom(ratio) {\n\n  function resquarify(parent, x0, y0, x1, y1) {\n    if ((rows = parent._squarify) && (rows.ratio === ratio)) {\n      var rows,\n          row,\n          nodes,\n          i,\n          j = -1,\n          n,\n          m = rows.length,\n          value = parent.value;\n\n      while (++j < m) {\n        row = rows[j], nodes = row.children;\n        for (i = row.value = 0, n = nodes.length; i < n; ++i) row.value += nodes[i].value;\n        if (row.dice) treemapDice(row, x0, y0, x1, y0 += (y1 - y0) * row.value / value);\n        else treemapSlice(row, x0, y0, x0 += (x1 - x0) * row.value / value, y1);\n        value -= row.value;\n      }\n    } else {\n      parent._squarify = rows = squarifyRatio(ratio, parent, x0, y0, x1, y1);\n      rows.ratio = ratio;\n    }\n  }\n\n  resquarify.ratio = function(x) {\n    return custom((x = +x) > 1 ? x : 1);\n  };\n\n  return resquarify;\n})(phi);\n\nfunction area$2(polygon) {\n  var i = -1,\n      n = polygon.length,\n      a,\n      b = polygon[n - 1],\n      area = 0;\n\n  while (++i < n) {\n    a = b;\n    b = polygon[i];\n    area += a[1] * b[0] - a[0] * b[1];\n  }\n\n  return area / 2;\n}\n\nfunction centroid$1(polygon) {\n  var i = -1,\n      n = polygon.length,\n      x = 0,\n      y = 0,\n      a,\n      b = polygon[n - 1],\n      c,\n      k = 0;\n\n  while (++i < n) {\n    a = b;\n    b = polygon[i];\n    k += c = a[0] * b[1] - b[0] * a[1];\n    x += (a[0] + b[0]) * c;\n    y += (a[1] + b[1]) * c;\n  }\n\n  return k *= 3, [x / k, y / k];\n}\n\n// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of\n// the 3D cross product in a quadrant I Cartesian coordinate system (+x is\n// right, +y is up). Returns a positive value if ABC is counter-clockwise,\n// negative if clockwise, and zero if the points are collinear.\nfunction cross$1(a, b, c) {\n  return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);\n}\n\nfunction lexicographicOrder(a, b) {\n  return a[0] - b[0] || a[1] - b[1];\n}\n\n// Computes the upper convex hull per the monotone chain algorithm.\n// Assumes points.length >= 3, is sorted by x, unique in y.\n// Returns an array of indices into points in left-to-right order.\nfunction computeUpperHullIndexes(points) {\n  var n = points.length,\n      indexes = [0, 1],\n      size = 2;\n\n  for (var i = 2; i < n; ++i) {\n    while (size > 1 && cross$1(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) --size;\n    indexes[size++] = i;\n  }\n\n  return indexes.slice(0, size); // remove popped points\n}\n\nfunction hull(points) {\n  if ((n = points.length) < 3) return null;\n\n  var i,\n      n,\n      sortedPoints = new Array(n),\n      flippedPoints = new Array(n);\n\n  for (i = 0; i < n; ++i) sortedPoints[i] = [+points[i][0], +points[i][1], i];\n  sortedPoints.sort(lexicographicOrder);\n  for (i = 0; i < n; ++i) flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];\n\n  var upperIndexes = computeUpperHullIndexes(sortedPoints),\n      lowerIndexes = computeUpperHullIndexes(flippedPoints);\n\n  // Construct the hull polygon, removing possible duplicate endpoints.\n  var skipLeft = lowerIndexes[0] === upperIndexes[0],\n      skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],\n      hull = [];\n\n  // Add upper hull in right-to-l order.\n  // Then add lower hull in left-to-right order.\n  for (i = upperIndexes.length - 1; i >= 0; --i) hull.push(points[sortedPoints[upperIndexes[i]][2]]);\n  for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) hull.push(points[sortedPoints[lowerIndexes[i]][2]]);\n\n  return hull;\n}\n\nfunction contains$2(polygon, point) {\n  var n = polygon.length,\n      p = polygon[n - 1],\n      x = point[0], y = point[1],\n      x0 = p[0], y0 = p[1],\n      x1, y1,\n      inside = false;\n\n  for (var i = 0; i < n; ++i) {\n    p = polygon[i], x1 = p[0], y1 = p[1];\n    if (((y1 > y) !== (y0 > y)) && (x < (x0 - x1) * (y - y1) / (y0 - y1) + x1)) inside = !inside;\n    x0 = x1, y0 = y1;\n  }\n\n  return inside;\n}\n\nfunction length$2(polygon) {\n  var i = -1,\n      n = polygon.length,\n      b = polygon[n - 1],\n      xa,\n      ya,\n      xb = b[0],\n      yb = b[1],\n      perimeter = 0;\n\n  while (++i < n) {\n    xa = xb;\n    ya = yb;\n    b = polygon[i];\n    xb = b[0];\n    yb = b[1];\n    xa -= xb;\n    ya -= yb;\n    perimeter += Math.sqrt(xa * xa + ya * ya);\n  }\n\n  return perimeter;\n}\n\nfunction defaultSource$1() {\n  return Math.random();\n}\n\nvar uniform = (function sourceRandomUniform(source) {\n  function randomUniform(min, max) {\n    min = min == null ? 0 : +min;\n    max = max == null ? 1 : +max;\n    if (arguments.length === 1) max = min, min = 0;\n    else max -= min;\n    return function() {\n      return source() * max + min;\n    };\n  }\n\n  randomUniform.source = sourceRandomUniform;\n\n  return randomUniform;\n})(defaultSource$1);\n\nvar normal = (function sourceRandomNormal(source) {\n  function randomNormal(mu, sigma) {\n    var x, r;\n    mu = mu == null ? 0 : +mu;\n    sigma = sigma == null ? 1 : +sigma;\n    return function() {\n      var y;\n\n      // If available, use the second previously-generated uniform random.\n      if (x != null) y = x, x = null;\n\n      // Otherwise, generate a new x and y.\n      else do {\n        x = source() * 2 - 1;\n        y = source() * 2 - 1;\n        r = x * x + y * y;\n      } while (!r || r > 1);\n\n      return mu + sigma * y * Math.sqrt(-2 * Math.log(r) / r);\n    };\n  }\n\n  randomNormal.source = sourceRandomNormal;\n\n  return randomNormal;\n})(defaultSource$1);\n\nvar logNormal = (function sourceRandomLogNormal(source) {\n  function randomLogNormal() {\n    var randomNormal = normal.source(source).apply(this, arguments);\n    return function() {\n      return Math.exp(randomNormal());\n    };\n  }\n\n  randomLogNormal.source = sourceRandomLogNormal;\n\n  return randomLogNormal;\n})(defaultSource$1);\n\nvar irwinHall = (function sourceRandomIrwinHall(source) {\n  function randomIrwinHall(n) {\n    return function() {\n      for (var sum = 0, i = 0; i < n; ++i) sum += source();\n      return sum;\n    };\n  }\n\n  randomIrwinHall.source = sourceRandomIrwinHall;\n\n  return randomIrwinHall;\n})(defaultSource$1);\n\nvar bates = (function sourceRandomBates(source) {\n  function randomBates(n) {\n    var randomIrwinHall = irwinHall.source(source)(n);\n    return function() {\n      return randomIrwinHall() / n;\n    };\n  }\n\n  randomBates.source = sourceRandomBates;\n\n  return randomBates;\n})(defaultSource$1);\n\nvar exponential$1 = (function sourceRandomExponential(source) {\n  function randomExponential(lambda) {\n    return function() {\n      return -Math.log(1 - source()) / lambda;\n    };\n  }\n\n  randomExponential.source = sourceRandomExponential;\n\n  return randomExponential;\n})(defaultSource$1);\n\nfunction initRange(domain, range) {\n  switch (arguments.length) {\n    case 0: break;\n    case 1: this.range(domain); break;\n    default: this.range(range).domain(domain); break;\n  }\n  return this;\n}\n\nfunction initInterpolator(domain, interpolator) {\n  switch (arguments.length) {\n    case 0: break;\n    case 1: this.interpolator(domain); break;\n    default: this.interpolator(interpolator).domain(domain); break;\n  }\n  return this;\n}\n\nvar array$3 = Array.prototype;\n\nvar map$3 = array$3.map;\nvar slice$5 = array$3.slice;\n\nvar implicit = {name: \"implicit\"};\n\nfunction ordinal() {\n  var index = map$1(),\n      domain = [],\n      range = [],\n      unknown = implicit;\n\n  function scale(d) {\n    var key = d + \"\", i = index.get(key);\n    if (!i) {\n      if (unknown !== implicit) return unknown;\n      index.set(key, i = domain.push(d));\n    }\n    return range[(i - 1) % range.length];\n  }\n\n  scale.domain = function(_) {\n    if (!arguments.length) return domain.slice();\n    domain = [], index = map$1();\n    var i = -1, n = _.length, d, key;\n    while (++i < n) if (!index.has(key = (d = _[i]) + \"\")) index.set(key, domain.push(d));\n    return scale;\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range = slice$5.call(_), scale) : range.slice();\n  };\n\n  scale.unknown = function(_) {\n    return arguments.length ? (unknown = _, scale) : unknown;\n  };\n\n  scale.copy = function() {\n    return ordinal(domain, range).unknown(unknown);\n  };\n\n  initRange.apply(scale, arguments);\n\n  return scale;\n}\n\nfunction band() {\n  var scale = ordinal().unknown(undefined),\n      domain = scale.domain,\n      ordinalRange = scale.range,\n      range = [0, 1],\n      step,\n      bandwidth,\n      round = false,\n      paddingInner = 0,\n      paddingOuter = 0,\n      align = 0.5;\n\n  delete scale.unknown;\n\n  function rescale() {\n    var n = domain().length,\n        reverse = range[1] < range[0],\n        start = range[reverse - 0],\n        stop = range[1 - reverse];\n    step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2);\n    if (round) step = Math.floor(step);\n    start += (stop - start - step * (n - paddingInner)) * align;\n    bandwidth = step * (1 - paddingInner);\n    if (round) start = Math.round(start), bandwidth = Math.round(bandwidth);\n    var values = sequence(n).map(function(i) { return start + step * i; });\n    return ordinalRange(reverse ? values.reverse() : values);\n  }\n\n  scale.domain = function(_) {\n    return arguments.length ? (domain(_), rescale()) : domain();\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range = [+_[0], +_[1]], rescale()) : range.slice();\n  };\n\n  scale.rangeRound = function(_) {\n    return range = [+_[0], +_[1]], round = true, rescale();\n  };\n\n  scale.bandwidth = function() {\n    return bandwidth;\n  };\n\n  scale.step = function() {\n    return step;\n  };\n\n  scale.round = function(_) {\n    return arguments.length ? (round = !!_, rescale()) : round;\n  };\n\n  scale.padding = function(_) {\n    return arguments.length ? (paddingInner = Math.min(1, paddingOuter = +_), rescale()) : paddingInner;\n  };\n\n  scale.paddingInner = function(_) {\n    return arguments.length ? (paddingInner = Math.min(1, _), rescale()) : paddingInner;\n  };\n\n  scale.paddingOuter = function(_) {\n    return arguments.length ? (paddingOuter = +_, rescale()) : paddingOuter;\n  };\n\n  scale.align = function(_) {\n    return arguments.length ? (align = Math.max(0, Math.min(1, _)), rescale()) : align;\n  };\n\n  scale.copy = function() {\n    return band(domain(), range)\n        .round(round)\n        .paddingInner(paddingInner)\n        .paddingOuter(paddingOuter)\n        .align(align);\n  };\n\n  return initRange.apply(rescale(), arguments);\n}\n\nfunction pointish(scale) {\n  var copy = scale.copy;\n\n  scale.padding = scale.paddingOuter;\n  delete scale.paddingInner;\n  delete scale.paddingOuter;\n\n  scale.copy = function() {\n    return pointish(copy());\n  };\n\n  return scale;\n}\n\nfunction point$1() {\n  return pointish(band.apply(null, arguments).paddingInner(1));\n}\n\nfunction constant$a(x) {\n  return function() {\n    return x;\n  };\n}\n\nfunction number$2(x) {\n  return +x;\n}\n\nvar unit = [0, 1];\n\nfunction identity$6(x) {\n  return x;\n}\n\nfunction normalize(a, b) {\n  return (b -= (a = +a))\n      ? function(x) { return (x - a) / b; }\n      : constant$a(isNaN(b) ? NaN : 0.5);\n}\n\nfunction clamper(domain) {\n  var a = domain[0], b = domain[domain.length - 1], t;\n  if (a > b) t = a, a = b, b = t;\n  return function(x) { return Math.max(a, Math.min(b, x)); };\n}\n\n// normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].\n// interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].\nfunction bimap(domain, range, interpolate) {\n  var d0 = domain[0], d1 = domain[1], r0 = range[0], r1 = range[1];\n  if (d1 < d0) d0 = normalize(d1, d0), r0 = interpolate(r1, r0);\n  else d0 = normalize(d0, d1), r0 = interpolate(r0, r1);\n  return function(x) { return r0(d0(x)); };\n}\n\nfunction polymap(domain, range, interpolate) {\n  var j = Math.min(domain.length, range.length) - 1,\n      d = new Array(j),\n      r = new Array(j),\n      i = -1;\n\n  // Reverse descending domains.\n  if (domain[j] < domain[0]) {\n    domain = domain.slice().reverse();\n    range = range.slice().reverse();\n  }\n\n  while (++i < j) {\n    d[i] = normalize(domain[i], domain[i + 1]);\n    r[i] = interpolate(range[i], range[i + 1]);\n  }\n\n  return function(x) {\n    var i = bisectRight(domain, x, 1, j) - 1;\n    return r[i](d[i](x));\n  };\n}\n\nfunction copy(source, target) {\n  return target\n      .domain(source.domain())\n      .range(source.range())\n      .interpolate(source.interpolate())\n      .clamp(source.clamp())\n      .unknown(source.unknown());\n}\n\nfunction transformer$1() {\n  var domain = unit,\n      range = unit,\n      interpolate = interpolateValue,\n      transform,\n      untransform,\n      unknown,\n      clamp = identity$6,\n      piecewise,\n      output,\n      input;\n\n  function rescale() {\n    piecewise = Math.min(domain.length, range.length) > 2 ? polymap : bimap;\n    output = input = null;\n    return scale;\n  }\n\n  function scale(x) {\n    return isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));\n  }\n\n  scale.invert = function(y) {\n    return clamp(untransform((input || (input = piecewise(range, domain.map(transform), interpolateNumber)))(y)));\n  };\n\n  scale.domain = function(_) {\n    return arguments.length ? (domain = map$3.call(_, number$2), clamp === identity$6 || (clamp = clamper(domain)), rescale()) : domain.slice();\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range = slice$5.call(_), rescale()) : range.slice();\n  };\n\n  scale.rangeRound = function(_) {\n    return range = slice$5.call(_), interpolate = interpolateRound, rescale();\n  };\n\n  scale.clamp = function(_) {\n    return arguments.length ? (clamp = _ ? clamper(domain) : identity$6, scale) : clamp !== identity$6;\n  };\n\n  scale.interpolate = function(_) {\n    return arguments.length ? (interpolate = _, rescale()) : interpolate;\n  };\n\n  scale.unknown = function(_) {\n    return arguments.length ? (unknown = _, scale) : unknown;\n  };\n\n  return function(t, u) {\n    transform = t, untransform = u;\n    return rescale();\n  };\n}\n\nfunction continuous(transform, untransform) {\n  return transformer$1()(transform, untransform);\n}\n\nfunction tickFormat(start, stop, count, specifier) {\n  var step = tickStep(start, stop, count),\n      precision;\n  specifier = formatSpecifier(specifier == null ? \",f\" : specifier);\n  switch (specifier.type) {\n    case \"s\": {\n      var value = Math.max(Math.abs(start), Math.abs(stop));\n      if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;\n      return exports.formatPrefix(specifier, value);\n    }\n    case \"\":\n    case \"e\":\n    case \"g\":\n    case \"p\":\n    case \"r\": {\n      if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === \"e\");\n      break;\n    }\n    case \"f\":\n    case \"%\": {\n      if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === \"%\") * 2;\n      break;\n    }\n  }\n  return exports.format(specifier);\n}\n\nfunction linearish(scale) {\n  var domain = scale.domain;\n\n  scale.ticks = function(count) {\n    var d = domain();\n    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);\n  };\n\n  scale.tickFormat = function(count, specifier) {\n    var d = domain();\n    return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);\n  };\n\n  scale.nice = function(count) {\n    if (count == null) count = 10;\n\n    var d = domain(),\n        i0 = 0,\n        i1 = d.length - 1,\n        start = d[i0],\n        stop = d[i1],\n        step;\n\n    if (stop < start) {\n      step = start, start = stop, stop = step;\n      step = i0, i0 = i1, i1 = step;\n    }\n\n    step = tickIncrement(start, stop, count);\n\n    if (step > 0) {\n      start = Math.floor(start / step) * step;\n      stop = Math.ceil(stop / step) * step;\n      step = tickIncrement(start, stop, count);\n    } else if (step < 0) {\n      start = Math.ceil(start * step) / step;\n      stop = Math.floor(stop * step) / step;\n      step = tickIncrement(start, stop, count);\n    }\n\n    if (step > 0) {\n      d[i0] = Math.floor(start / step) * step;\n      d[i1] = Math.ceil(stop / step) * step;\n      domain(d);\n    } else if (step < 0) {\n      d[i0] = Math.ceil(start * step) / step;\n      d[i1] = Math.floor(stop * step) / step;\n      domain(d);\n    }\n\n    return scale;\n  };\n\n  return scale;\n}\n\nfunction linear$2() {\n  var scale = continuous(identity$6, identity$6);\n\n  scale.copy = function() {\n    return copy(scale, linear$2());\n  };\n\n  initRange.apply(scale, arguments);\n\n  return linearish(scale);\n}\n\nfunction identity$7(domain) {\n  var unknown;\n\n  function scale(x) {\n    return isNaN(x = +x) ? unknown : x;\n  }\n\n  scale.invert = scale;\n\n  scale.domain = scale.range = function(_) {\n    return arguments.length ? (domain = map$3.call(_, number$2), scale) : domain.slice();\n  };\n\n  scale.unknown = function(_) {\n    return arguments.length ? (unknown = _, scale) : unknown;\n  };\n\n  scale.copy = function() {\n    return identity$7(domain).unknown(unknown);\n  };\n\n  domain = arguments.length ? map$3.call(domain, number$2) : [0, 1];\n\n  return linearish(scale);\n}\n\nfunction nice(domain, interval) {\n  domain = domain.slice();\n\n  var i0 = 0,\n      i1 = domain.length - 1,\n      x0 = domain[i0],\n      x1 = domain[i1],\n      t;\n\n  if (x1 < x0) {\n    t = i0, i0 = i1, i1 = t;\n    t = x0, x0 = x1, x1 = t;\n  }\n\n  domain[i0] = interval.floor(x0);\n  domain[i1] = interval.ceil(x1);\n  return domain;\n}\n\nfunction transformLog(x) {\n  return Math.log(x);\n}\n\nfunction transformExp(x) {\n  return Math.exp(x);\n}\n\nfunction transformLogn(x) {\n  return -Math.log(-x);\n}\n\nfunction transformExpn(x) {\n  return -Math.exp(-x);\n}\n\nfunction pow10(x) {\n  return isFinite(x) ? +(\"1e\" + x) : x < 0 ? 0 : x;\n}\n\nfunction powp(base) {\n  return base === 10 ? pow10\n      : base === Math.E ? Math.exp\n      : function(x) { return Math.pow(base, x); };\n}\n\nfunction logp(base) {\n  return base === Math.E ? Math.log\n      : base === 10 && Math.log10\n      || base === 2 && Math.log2\n      || (base = Math.log(base), function(x) { return Math.log(x) / base; });\n}\n\nfunction reflect(f) {\n  return function(x) {\n    return -f(-x);\n  };\n}\n\nfunction loggish(transform) {\n  var scale = transform(transformLog, transformExp),\n      domain = scale.domain,\n      base = 10,\n      logs,\n      pows;\n\n  function rescale() {\n    logs = logp(base), pows = powp(base);\n    if (domain()[0] < 0) {\n      logs = reflect(logs), pows = reflect(pows);\n      transform(transformLogn, transformExpn);\n    } else {\n      transform(transformLog, transformExp);\n    }\n    return scale;\n  }\n\n  scale.base = function(_) {\n    return arguments.length ? (base = +_, rescale()) : base;\n  };\n\n  scale.domain = function(_) {\n    return arguments.length ? (domain(_), rescale()) : domain();\n  };\n\n  scale.ticks = function(count) {\n    var d = domain(),\n        u = d[0],\n        v = d[d.length - 1],\n        r;\n\n    if (r = v < u) i = u, u = v, v = i;\n\n    var i = logs(u),\n        j = logs(v),\n        p,\n        k,\n        t,\n        n = count == null ? 10 : +count,\n        z = [];\n\n    if (!(base % 1) && j - i < n) {\n      i = Math.round(i) - 1, j = Math.round(j) + 1;\n      if (u > 0) for (; i < j; ++i) {\n        for (k = 1, p = pows(i); k < base; ++k) {\n          t = p * k;\n          if (t < u) continue;\n          if (t > v) break;\n          z.push(t);\n        }\n      } else for (; i < j; ++i) {\n        for (k = base - 1, p = pows(i); k >= 1; --k) {\n          t = p * k;\n          if (t < u) continue;\n          if (t > v) break;\n          z.push(t);\n        }\n      }\n    } else {\n      z = ticks(i, j, Math.min(j - i, n)).map(pows);\n    }\n\n    return r ? z.reverse() : z;\n  };\n\n  scale.tickFormat = function(count, specifier) {\n    if (specifier == null) specifier = base === 10 ? \".0e\" : \",\";\n    if (typeof specifier !== \"function\") specifier = exports.format(specifier);\n    if (count === Infinity) return specifier;\n    if (count == null) count = 10;\n    var k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate?\n    return function(d) {\n      var i = d / pows(Math.round(logs(d)));\n      if (i * base < base - 0.5) i *= base;\n      return i <= k ? specifier(d) : \"\";\n    };\n  };\n\n  scale.nice = function() {\n    return domain(nice(domain(), {\n      floor: function(x) { return pows(Math.floor(logs(x))); },\n      ceil: function(x) { return pows(Math.ceil(logs(x))); }\n    }));\n  };\n\n  return scale;\n}\n\nfunction log$1() {\n  var scale = loggish(transformer$1()).domain([1, 10]);\n\n  scale.copy = function() {\n    return copy(scale, log$1()).base(scale.base());\n  };\n\n  initRange.apply(scale, arguments);\n\n  return scale;\n}\n\nfunction transformSymlog(c) {\n  return function(x) {\n    return Math.sign(x) * Math.log1p(Math.abs(x / c));\n  };\n}\n\nfunction transformSymexp(c) {\n  return function(x) {\n    return Math.sign(x) * Math.expm1(Math.abs(x)) * c;\n  };\n}\n\nfunction symlogish(transform) {\n  var c = 1, scale = transform(transformSymlog(c), transformSymexp(c));\n\n  scale.constant = function(_) {\n    return arguments.length ? transform(transformSymlog(c = +_), transformSymexp(c)) : c;\n  };\n\n  return linearish(scale);\n}\n\nfunction symlog() {\n  var scale = symlogish(transformer$1());\n\n  scale.copy = function() {\n    return copy(scale, symlog()).constant(scale.constant());\n  };\n\n  return initRange.apply(scale, arguments);\n}\n\nfunction transformPow(exponent) {\n  return function(x) {\n    return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);\n  };\n}\n\nfunction transformSqrt(x) {\n  return x < 0 ? -Math.sqrt(-x) : Math.sqrt(x);\n}\n\nfunction transformSquare(x) {\n  return x < 0 ? -x * x : x * x;\n}\n\nfunction powish(transform) {\n  var scale = transform(identity$6, identity$6),\n      exponent = 1;\n\n  function rescale() {\n    return exponent === 1 ? transform(identity$6, identity$6)\n        : exponent === 0.5 ? transform(transformSqrt, transformSquare)\n        : transform(transformPow(exponent), transformPow(1 / exponent));\n  }\n\n  scale.exponent = function(_) {\n    return arguments.length ? (exponent = +_, rescale()) : exponent;\n  };\n\n  return linearish(scale);\n}\n\nfunction pow$1() {\n  var scale = powish(transformer$1());\n\n  scale.copy = function() {\n    return copy(scale, pow$1()).exponent(scale.exponent());\n  };\n\n  initRange.apply(scale, arguments);\n\n  return scale;\n}\n\nfunction sqrt$1() {\n  return pow$1.apply(null, arguments).exponent(0.5);\n}\n\nfunction quantile() {\n  var domain = [],\n      range = [],\n      thresholds = [],\n      unknown;\n\n  function rescale() {\n    var i = 0, n = Math.max(1, range.length);\n    thresholds = new Array(n - 1);\n    while (++i < n) thresholds[i - 1] = threshold(domain, i / n);\n    return scale;\n  }\n\n  function scale(x) {\n    return isNaN(x = +x) ? unknown : range[bisectRight(thresholds, x)];\n  }\n\n  scale.invertExtent = function(y) {\n    var i = range.indexOf(y);\n    return i < 0 ? [NaN, NaN] : [\n      i > 0 ? thresholds[i - 1] : domain[0],\n      i < thresholds.length ? thresholds[i] : domain[domain.length - 1]\n    ];\n  };\n\n  scale.domain = function(_) {\n    if (!arguments.length) return domain.slice();\n    domain = [];\n    for (var i = 0, n = _.length, d; i < n; ++i) if (d = _[i], d != null && !isNaN(d = +d)) domain.push(d);\n    domain.sort(ascending);\n    return rescale();\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range = slice$5.call(_), rescale()) : range.slice();\n  };\n\n  scale.unknown = function(_) {\n    return arguments.length ? (unknown = _, scale) : unknown;\n  };\n\n  scale.quantiles = function() {\n    return thresholds.slice();\n  };\n\n  scale.copy = function() {\n    return quantile()\n        .domain(domain)\n        .range(range)\n        .unknown(unknown);\n  };\n\n  return initRange.apply(scale, arguments);\n}\n\nfunction quantize$1() {\n  var x0 = 0,\n      x1 = 1,\n      n = 1,\n      domain = [0.5],\n      range = [0, 1],\n      unknown;\n\n  function scale(x) {\n    return x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;\n  }\n\n  function rescale() {\n    var i = -1;\n    domain = new Array(n);\n    while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);\n    return scale;\n  }\n\n  scale.domain = function(_) {\n    return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1];\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (n = (range = slice$5.call(_)).length - 1, rescale()) : range.slice();\n  };\n\n  scale.invertExtent = function(y) {\n    var i = range.indexOf(y);\n    return i < 0 ? [NaN, NaN]\n        : i < 1 ? [x0, domain[0]]\n        : i >= n ? [domain[n - 1], x1]\n        : [domain[i - 1], domain[i]];\n  };\n\n  scale.unknown = function(_) {\n    return arguments.length ? (unknown = _, scale) : scale;\n  };\n\n  scale.thresholds = function() {\n    return domain.slice();\n  };\n\n  scale.copy = function() {\n    return quantize$1()\n        .domain([x0, x1])\n        .range(range)\n        .unknown(unknown);\n  };\n\n  return initRange.apply(linearish(scale), arguments);\n}\n\nfunction threshold$1() {\n  var domain = [0.5],\n      range = [0, 1],\n      unknown,\n      n = 1;\n\n  function scale(x) {\n    return x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;\n  }\n\n  scale.domain = function(_) {\n    return arguments.length ? (domain = slice$5.call(_), n = Math.min(domain.length, range.length - 1), scale) : domain.slice();\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range = slice$5.call(_), n = Math.min(domain.length, range.length - 1), scale) : range.slice();\n  };\n\n  scale.invertExtent = function(y) {\n    var i = range.indexOf(y);\n    return [domain[i - 1], domain[i]];\n  };\n\n  scale.unknown = function(_) {\n    return arguments.length ? (unknown = _, scale) : unknown;\n  };\n\n  scale.copy = function() {\n    return threshold$1()\n        .domain(domain)\n        .range(range)\n        .unknown(unknown);\n  };\n\n  return initRange.apply(scale, arguments);\n}\n\nvar t0$1 = new Date,\n    t1$1 = new Date;\n\nfunction newInterval(floori, offseti, count, field) {\n\n  function interval(date) {\n    return floori(date = arguments.length === 0 ? new Date : new Date(+date)), date;\n  }\n\n  interval.floor = function(date) {\n    return floori(date = new Date(+date)), date;\n  };\n\n  interval.ceil = function(date) {\n    return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;\n  };\n\n  interval.round = function(date) {\n    var d0 = interval(date),\n        d1 = interval.ceil(date);\n    return date - d0 < d1 - date ? d0 : d1;\n  };\n\n  interval.offset = function(date, step) {\n    return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;\n  };\n\n  interval.range = function(start, stop, step) {\n    var range = [], previous;\n    start = interval.ceil(start);\n    step = step == null ? 1 : Math.floor(step);\n    if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date\n    do range.push(previous = new Date(+start)), offseti(start, step), floori(start);\n    while (previous < start && start < stop);\n    return range;\n  };\n\n  interval.filter = function(test) {\n    return newInterval(function(date) {\n      if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);\n    }, function(date, step) {\n      if (date >= date) {\n        if (step < 0) while (++step <= 0) {\n          while (offseti(date, -1), !test(date)) {} // eslint-disable-line no-empty\n        } else while (--step >= 0) {\n          while (offseti(date, +1), !test(date)) {} // eslint-disable-line no-empty\n        }\n      }\n    });\n  };\n\n  if (count) {\n    interval.count = function(start, end) {\n      t0$1.setTime(+start), t1$1.setTime(+end);\n      floori(t0$1), floori(t1$1);\n      return Math.floor(count(t0$1, t1$1));\n    };\n\n    interval.every = function(step) {\n      step = Math.floor(step);\n      return !isFinite(step) || !(step > 0) ? null\n          : !(step > 1) ? interval\n          : interval.filter(field\n              ? function(d) { return field(d) % step === 0; }\n              : function(d) { return interval.count(0, d) % step === 0; });\n    };\n  }\n\n  return interval;\n}\n\nvar millisecond = newInterval(function() {\n  // noop\n}, function(date, step) {\n  date.setTime(+date + step);\n}, function(start, end) {\n  return end - start;\n});\n\n// An optimized implementation for this simple case.\nmillisecond.every = function(k) {\n  k = Math.floor(k);\n  if (!isFinite(k) || !(k > 0)) return null;\n  if (!(k > 1)) return millisecond;\n  return newInterval(function(date) {\n    date.setTime(Math.floor(date / k) * k);\n  }, function(date, step) {\n    date.setTime(+date + step * k);\n  }, function(start, end) {\n    return (end - start) / k;\n  });\n};\nvar milliseconds = millisecond.range;\n\nvar durationSecond = 1e3;\nvar durationMinute = 6e4;\nvar durationHour = 36e5;\nvar durationDay = 864e5;\nvar durationWeek = 6048e5;\n\nvar second = newInterval(function(date) {\n  date.setTime(date - date.getMilliseconds());\n}, function(date, step) {\n  date.setTime(+date + step * durationSecond);\n}, function(start, end) {\n  return (end - start) / durationSecond;\n}, function(date) {\n  return date.getUTCSeconds();\n});\nvar seconds = second.range;\n\nvar minute = newInterval(function(date) {\n  date.setTime(date - date.getMilliseconds() - date.getSeconds() * durationSecond);\n}, function(date, step) {\n  date.setTime(+date + step * durationMinute);\n}, function(start, end) {\n  return (end - start) / durationMinute;\n}, function(date) {\n  return date.getMinutes();\n});\nvar minutes = minute.range;\n\nvar hour = newInterval(function(date) {\n  date.setTime(date - date.getMilliseconds() - date.getSeconds() * durationSecond - date.getMinutes() * durationMinute);\n}, function(date, step) {\n  date.setTime(+date + step * durationHour);\n}, function(start, end) {\n  return (end - start) / durationHour;\n}, function(date) {\n  return date.getHours();\n});\nvar hours = hour.range;\n\nvar day = newInterval(function(date) {\n  date.setHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setDate(date.getDate() + step);\n}, function(start, end) {\n  return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationDay;\n}, function(date) {\n  return date.getDate() - 1;\n});\nvar days = day.range;\n\nfunction weekday(i) {\n  return newInterval(function(date) {\n    date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);\n    date.setHours(0, 0, 0, 0);\n  }, function(date, step) {\n    date.setDate(date.getDate() + step * 7);\n  }, function(start, end) {\n    return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationWeek;\n  });\n}\n\nvar sunday = weekday(0);\nvar monday = weekday(1);\nvar tuesday = weekday(2);\nvar wednesday = weekday(3);\nvar thursday = weekday(4);\nvar friday = weekday(5);\nvar saturday = weekday(6);\n\nvar sundays = sunday.range;\nvar mondays = monday.range;\nvar tuesdays = tuesday.range;\nvar wednesdays = wednesday.range;\nvar thursdays = thursday.range;\nvar fridays = friday.range;\nvar saturdays = saturday.range;\n\nvar month = newInterval(function(date) {\n  date.setDate(1);\n  date.setHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setMonth(date.getMonth() + step);\n}, function(start, end) {\n  return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;\n}, function(date) {\n  return date.getMonth();\n});\nvar months = month.range;\n\nvar year = newInterval(function(date) {\n  date.setMonth(0, 1);\n  date.setHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setFullYear(date.getFullYear() + step);\n}, function(start, end) {\n  return end.getFullYear() - start.getFullYear();\n}, function(date) {\n  return date.getFullYear();\n});\n\n// An optimized implementation for this simple case.\nyear.every = function(k) {\n  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {\n    date.setFullYear(Math.floor(date.getFullYear() / k) * k);\n    date.setMonth(0, 1);\n    date.setHours(0, 0, 0, 0);\n  }, function(date, step) {\n    date.setFullYear(date.getFullYear() + step * k);\n  });\n};\nvar years = year.range;\n\nvar utcMinute = newInterval(function(date) {\n  date.setUTCSeconds(0, 0);\n}, function(date, step) {\n  date.setTime(+date + step * durationMinute);\n}, function(start, end) {\n  return (end - start) / durationMinute;\n}, function(date) {\n  return date.getUTCMinutes();\n});\nvar utcMinutes = utcMinute.range;\n\nvar utcHour = newInterval(function(date) {\n  date.setUTCMinutes(0, 0, 0);\n}, function(date, step) {\n  date.setTime(+date + step * durationHour);\n}, function(start, end) {\n  return (end - start) / durationHour;\n}, function(date) {\n  return date.getUTCHours();\n});\nvar utcHours = utcHour.range;\n\nvar utcDay = newInterval(function(date) {\n  date.setUTCHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setUTCDate(date.getUTCDate() + step);\n}, function(start, end) {\n  return (end - start) / durationDay;\n}, function(date) {\n  return date.getUTCDate() - 1;\n});\nvar utcDays = utcDay.range;\n\nfunction utcWeekday(i) {\n  return newInterval(function(date) {\n    date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);\n    date.setUTCHours(0, 0, 0, 0);\n  }, function(date, step) {\n    date.setUTCDate(date.getUTCDate() + step * 7);\n  }, function(start, end) {\n    return (end - start) / durationWeek;\n  });\n}\n\nvar utcSunday = utcWeekday(0);\nvar utcMonday = utcWeekday(1);\nvar utcTuesday = utcWeekday(2);\nvar utcWednesday = utcWeekday(3);\nvar utcThursday = utcWeekday(4);\nvar utcFriday = utcWeekday(5);\nvar utcSaturday = utcWeekday(6);\n\nvar utcSundays = utcSunday.range;\nvar utcMondays = utcMonday.range;\nvar utcTuesdays = utcTuesday.range;\nvar utcWednesdays = utcWednesday.range;\nvar utcThursdays = utcThursday.range;\nvar utcFridays = utcFriday.range;\nvar utcSaturdays = utcSaturday.range;\n\nvar utcMonth = newInterval(function(date) {\n  date.setUTCDate(1);\n  date.setUTCHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setUTCMonth(date.getUTCMonth() + step);\n}, function(start, end) {\n  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;\n}, function(date) {\n  return date.getUTCMonth();\n});\nvar utcMonths = utcMonth.range;\n\nvar utcYear = newInterval(function(date) {\n  date.setUTCMonth(0, 1);\n  date.setUTCHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setUTCFullYear(date.getUTCFullYear() + step);\n}, function(start, end) {\n  return end.getUTCFullYear() - start.getUTCFullYear();\n}, function(date) {\n  return date.getUTCFullYear();\n});\n\n// An optimized implementation for this simple case.\nutcYear.every = function(k) {\n  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {\n    date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);\n    date.setUTCMonth(0, 1);\n    date.setUTCHours(0, 0, 0, 0);\n  }, function(date, step) {\n    date.setUTCFullYear(date.getUTCFullYear() + step * k);\n  });\n};\nvar utcYears = utcYear.range;\n\nfunction localDate(d) {\n  if (0 <= d.y && d.y < 100) {\n    var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);\n    date.setFullYear(d.y);\n    return date;\n  }\n  return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);\n}\n\nfunction utcDate(d) {\n  if (0 <= d.y && d.y < 100) {\n    var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));\n    date.setUTCFullYear(d.y);\n    return date;\n  }\n  return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));\n}\n\nfunction newDate(y, m, d) {\n  return {y: y, m: m, d: d, H: 0, M: 0, S: 0, L: 0};\n}\n\nfunction formatLocale$1(locale) {\n  var locale_dateTime = locale.dateTime,\n      locale_date = locale.date,\n      locale_time = locale.time,\n      locale_periods = locale.periods,\n      locale_weekdays = locale.days,\n      locale_shortWeekdays = locale.shortDays,\n      locale_months = locale.months,\n      locale_shortMonths = locale.shortMonths;\n\n  var periodRe = formatRe(locale_periods),\n      periodLookup = formatLookup(locale_periods),\n      weekdayRe = formatRe(locale_weekdays),\n      weekdayLookup = formatLookup(locale_weekdays),\n      shortWeekdayRe = formatRe(locale_shortWeekdays),\n      shortWeekdayLookup = formatLookup(locale_shortWeekdays),\n      monthRe = formatRe(locale_months),\n      monthLookup = formatLookup(locale_months),\n      shortMonthRe = formatRe(locale_shortMonths),\n      shortMonthLookup = formatLookup(locale_shortMonths);\n\n  var formats = {\n    \"a\": formatShortWeekday,\n    \"A\": formatWeekday,\n    \"b\": formatShortMonth,\n    \"B\": formatMonth,\n    \"c\": null,\n    \"d\": formatDayOfMonth,\n    \"e\": formatDayOfMonth,\n    \"f\": formatMicroseconds,\n    \"H\": formatHour24,\n    \"I\": formatHour12,\n    \"j\": formatDayOfYear,\n    \"L\": formatMilliseconds,\n    \"m\": formatMonthNumber,\n    \"M\": formatMinutes,\n    \"p\": formatPeriod,\n    \"q\": formatQuarter,\n    \"Q\": formatUnixTimestamp,\n    \"s\": formatUnixTimestampSeconds,\n    \"S\": formatSeconds,\n    \"u\": formatWeekdayNumberMonday,\n    \"U\": formatWeekNumberSunday,\n    \"V\": formatWeekNumberISO,\n    \"w\": formatWeekdayNumberSunday,\n    \"W\": formatWeekNumberMonday,\n    \"x\": null,\n    \"X\": null,\n    \"y\": formatYear$1,\n    \"Y\": formatFullYear,\n    \"Z\": formatZone,\n    \"%\": formatLiteralPercent\n  };\n\n  var utcFormats = {\n    \"a\": formatUTCShortWeekday,\n    \"A\": formatUTCWeekday,\n    \"b\": formatUTCShortMonth,\n    \"B\": formatUTCMonth,\n    \"c\": null,\n    \"d\": formatUTCDayOfMonth,\n    \"e\": formatUTCDayOfMonth,\n    \"f\": formatUTCMicroseconds,\n    \"H\": formatUTCHour24,\n    \"I\": formatUTCHour12,\n    \"j\": formatUTCDayOfYear,\n    \"L\": formatUTCMilliseconds,\n    \"m\": formatUTCMonthNumber,\n    \"M\": formatUTCMinutes,\n    \"p\": formatUTCPeriod,\n    \"q\": formatUTCQuarter,\n    \"Q\": formatUnixTimestamp,\n    \"s\": formatUnixTimestampSeconds,\n    \"S\": formatUTCSeconds,\n    \"u\": formatUTCWeekdayNumberMonday,\n    \"U\": formatUTCWeekNumberSunday,\n    \"V\": formatUTCWeekNumberISO,\n    \"w\": formatUTCWeekdayNumberSunday,\n    \"W\": formatUTCWeekNumberMonday,\n    \"x\": null,\n    \"X\": null,\n    \"y\": formatUTCYear,\n    \"Y\": formatUTCFullYear,\n    \"Z\": formatUTCZone,\n    \"%\": formatLiteralPercent\n  };\n\n  var parses = {\n    \"a\": parseShortWeekday,\n    \"A\": parseWeekday,\n    \"b\": parseShortMonth,\n    \"B\": parseMonth,\n    \"c\": parseLocaleDateTime,\n    \"d\": parseDayOfMonth,\n    \"e\": parseDayOfMonth,\n    \"f\": parseMicroseconds,\n    \"H\": parseHour24,\n    \"I\": parseHour24,\n    \"j\": parseDayOfYear,\n    \"L\": parseMilliseconds,\n    \"m\": parseMonthNumber,\n    \"M\": parseMinutes,\n    \"p\": parsePeriod,\n    \"q\": parseQuarter,\n    \"Q\": parseUnixTimestamp,\n    \"s\": parseUnixTimestampSeconds,\n    \"S\": parseSeconds,\n    \"u\": parseWeekdayNumberMonday,\n    \"U\": parseWeekNumberSunday,\n    \"V\": parseWeekNumberISO,\n    \"w\": parseWeekdayNumberSunday,\n    \"W\": parseWeekNumberMonday,\n    \"x\": parseLocaleDate,\n    \"X\": parseLocaleTime,\n    \"y\": parseYear,\n    \"Y\": parseFullYear,\n    \"Z\": parseZone,\n    \"%\": parseLiteralPercent\n  };\n\n  // These recursive directive definitions must be deferred.\n  formats.x = newFormat(locale_date, formats);\n  formats.X = newFormat(locale_time, formats);\n  formats.c = newFormat(locale_dateTime, formats);\n  utcFormats.x = newFormat(locale_date, utcFormats);\n  utcFormats.X = newFormat(locale_time, utcFormats);\n  utcFormats.c = newFormat(locale_dateTime, utcFormats);\n\n  function newFormat(specifier, formats) {\n    return function(date) {\n      var string = [],\n          i = -1,\n          j = 0,\n          n = specifier.length,\n          c,\n          pad,\n          format;\n\n      if (!(date instanceof Date)) date = new Date(+date);\n\n      while (++i < n) {\n        if (specifier.charCodeAt(i) === 37) {\n          string.push(specifier.slice(j, i));\n          if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i);\n          else pad = c === \"e\" ? \" \" : \"0\";\n          if (format = formats[c]) c = format(date, pad);\n          string.push(c);\n          j = i + 1;\n        }\n      }\n\n      string.push(specifier.slice(j, i));\n      return string.join(\"\");\n    };\n  }\n\n  function newParse(specifier, Z) {\n    return function(string) {\n      var d = newDate(1900, undefined, 1),\n          i = parseSpecifier(d, specifier, string += \"\", 0),\n          week, day$1;\n      if (i != string.length) return null;\n\n      // If a UNIX timestamp is specified, return it.\n      if (\"Q\" in d) return new Date(d.Q);\n      if (\"s\" in d) return new Date(d.s * 1000 + (\"L\" in d ? d.L : 0));\n\n      // If this is utcParse, never use the local timezone.\n      if (Z && !(\"Z\" in d)) d.Z = 0;\n\n      // The am-pm flag is 0 for AM, and 1 for PM.\n      if (\"p\" in d) d.H = d.H % 12 + d.p * 12;\n\n      // If the month was not specified, inherit from the quarter.\n      if (d.m === undefined) d.m = \"q\" in d ? d.q : 0;\n\n      // Convert day-of-week and week-of-year to day-of-year.\n      if (\"V\" in d) {\n        if (d.V < 1 || d.V > 53) return null;\n        if (!(\"w\" in d)) d.w = 1;\n        if (\"Z\" in d) {\n          week = utcDate(newDate(d.y, 0, 1)), day$1 = week.getUTCDay();\n          week = day$1 > 4 || day$1 === 0 ? utcMonday.ceil(week) : utcMonday(week);\n          week = utcDay.offset(week, (d.V - 1) * 7);\n          d.y = week.getUTCFullYear();\n          d.m = week.getUTCMonth();\n          d.d = week.getUTCDate() + (d.w + 6) % 7;\n        } else {\n          week = localDate(newDate(d.y, 0, 1)), day$1 = week.getDay();\n          week = day$1 > 4 || day$1 === 0 ? monday.ceil(week) : monday(week);\n          week = day.offset(week, (d.V - 1) * 7);\n          d.y = week.getFullYear();\n          d.m = week.getMonth();\n          d.d = week.getDate() + (d.w + 6) % 7;\n        }\n      } else if (\"W\" in d || \"U\" in d) {\n        if (!(\"w\" in d)) d.w = \"u\" in d ? d.u % 7 : \"W\" in d ? 1 : 0;\n        day$1 = \"Z\" in d ? utcDate(newDate(d.y, 0, 1)).getUTCDay() : localDate(newDate(d.y, 0, 1)).getDay();\n        d.m = 0;\n        d.d = \"W\" in d ? (d.w + 6) % 7 + d.W * 7 - (day$1 + 5) % 7 : d.w + d.U * 7 - (day$1 + 6) % 7;\n      }\n\n      // If a time zone is specified, all fields are interpreted as UTC and then\n      // offset according to the specified time zone.\n      if (\"Z\" in d) {\n        d.H += d.Z / 100 | 0;\n        d.M += d.Z % 100;\n        return utcDate(d);\n      }\n\n      // Otherwise, all fields are in local time.\n      return localDate(d);\n    };\n  }\n\n  function parseSpecifier(d, specifier, string, j) {\n    var i = 0,\n        n = specifier.length,\n        m = string.length,\n        c,\n        parse;\n\n    while (i < n) {\n      if (j >= m) return -1;\n      c = specifier.charCodeAt(i++);\n      if (c === 37) {\n        c = specifier.charAt(i++);\n        parse = parses[c in pads ? specifier.charAt(i++) : c];\n        if (!parse || ((j = parse(d, string, j)) < 0)) return -1;\n      } else if (c != string.charCodeAt(j++)) {\n        return -1;\n      }\n    }\n\n    return j;\n  }\n\n  function parsePeriod(d, string, i) {\n    var n = periodRe.exec(string.slice(i));\n    return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseShortWeekday(d, string, i) {\n    var n = shortWeekdayRe.exec(string.slice(i));\n    return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseWeekday(d, string, i) {\n    var n = weekdayRe.exec(string.slice(i));\n    return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseShortMonth(d, string, i) {\n    var n = shortMonthRe.exec(string.slice(i));\n    return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseMonth(d, string, i) {\n    var n = monthRe.exec(string.slice(i));\n    return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseLocaleDateTime(d, string, i) {\n    return parseSpecifier(d, locale_dateTime, string, i);\n  }\n\n  function parseLocaleDate(d, string, i) {\n    return parseSpecifier(d, locale_date, string, i);\n  }\n\n  function parseLocaleTime(d, string, i) {\n    return parseSpecifier(d, locale_time, string, i);\n  }\n\n  function formatShortWeekday(d) {\n    return locale_shortWeekdays[d.getDay()];\n  }\n\n  function formatWeekday(d) {\n    return locale_weekdays[d.getDay()];\n  }\n\n  function formatShortMonth(d) {\n    return locale_shortMonths[d.getMonth()];\n  }\n\n  function formatMonth(d) {\n    return locale_months[d.getMonth()];\n  }\n\n  function formatPeriod(d) {\n    return locale_periods[+(d.getHours() >= 12)];\n  }\n\n  function formatQuarter(d) {\n    return 1 + ~~(d.getMonth() / 3);\n  }\n\n  function formatUTCShortWeekday(d) {\n    return locale_shortWeekdays[d.getUTCDay()];\n  }\n\n  function formatUTCWeekday(d) {\n    return locale_weekdays[d.getUTCDay()];\n  }\n\n  function formatUTCShortMonth(d) {\n    return locale_shortMonths[d.getUTCMonth()];\n  }\n\n  function formatUTCMonth(d) {\n    return locale_months[d.getUTCMonth()];\n  }\n\n  function formatUTCPeriod(d) {\n    return locale_periods[+(d.getUTCHours() >= 12)];\n  }\n\n  function formatUTCQuarter(d) {\n    return 1 + ~~(d.getUTCMonth() / 3);\n  }\n\n  return {\n    format: function(specifier) {\n      var f = newFormat(specifier += \"\", formats);\n      f.toString = function() { return specifier; };\n      return f;\n    },\n    parse: function(specifier) {\n      var p = newParse(specifier += \"\", false);\n      p.toString = function() { return specifier; };\n      return p;\n    },\n    utcFormat: function(specifier) {\n      var f = newFormat(specifier += \"\", utcFormats);\n      f.toString = function() { return specifier; };\n      return f;\n    },\n    utcParse: function(specifier) {\n      var p = newParse(specifier += \"\", true);\n      p.toString = function() { return specifier; };\n      return p;\n    }\n  };\n}\n\nvar pads = {\"-\": \"\", \"_\": \" \", \"0\": \"0\"},\n    numberRe = /^\\s*\\d+/, // note: ignores next directive\n    percentRe = /^%/,\n    requoteRe = /[\\\\^$*+?|[\\]().{}]/g;\n\nfunction pad$1(value, fill, width) {\n  var sign = value < 0 ? \"-\" : \"\",\n      string = (sign ? -value : value) + \"\",\n      length = string.length;\n  return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);\n}\n\nfunction requote(s) {\n  return s.replace(requoteRe, \"\\\\$&\");\n}\n\nfunction formatRe(names) {\n  return new RegExp(\"^(?:\" + names.map(requote).join(\"|\") + \")\", \"i\");\n}\n\nfunction formatLookup(names) {\n  var map = {}, i = -1, n = names.length;\n  while (++i < n) map[names[i].toLowerCase()] = i;\n  return map;\n}\n\nfunction parseWeekdayNumberSunday(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 1));\n  return n ? (d.w = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseWeekdayNumberMonday(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 1));\n  return n ? (d.u = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseWeekNumberSunday(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.U = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseWeekNumberISO(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.V = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseWeekNumberMonday(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.W = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseFullYear(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 4));\n  return n ? (d.y = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseYear(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;\n}\n\nfunction parseZone(d, string, i) {\n  var n = /^(Z)|([+-]\\d\\d)(?::?(\\d\\d))?/.exec(string.slice(i, i + 6));\n  return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || \"00\")), i + n[0].length) : -1;\n}\n\nfunction parseQuarter(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 1));\n  return n ? (d.q = n[0] * 3 - 3, i + n[0].length) : -1;\n}\n\nfunction parseMonthNumber(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.m = n[0] - 1, i + n[0].length) : -1;\n}\n\nfunction parseDayOfMonth(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.d = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseDayOfYear(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 3));\n  return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseHour24(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.H = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseMinutes(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.M = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseSeconds(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.S = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseMilliseconds(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 3));\n  return n ? (d.L = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseMicroseconds(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 6));\n  return n ? (d.L = Math.floor(n[0] / 1000), i + n[0].length) : -1;\n}\n\nfunction parseLiteralPercent(d, string, i) {\n  var n = percentRe.exec(string.slice(i, i + 1));\n  return n ? i + n[0].length : -1;\n}\n\nfunction parseUnixTimestamp(d, string, i) {\n  var n = numberRe.exec(string.slice(i));\n  return n ? (d.Q = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseUnixTimestampSeconds(d, string, i) {\n  var n = numberRe.exec(string.slice(i));\n  return n ? (d.s = +n[0], i + n[0].length) : -1;\n}\n\nfunction formatDayOfMonth(d, p) {\n  return pad$1(d.getDate(), p, 2);\n}\n\nfunction formatHour24(d, p) {\n  return pad$1(d.getHours(), p, 2);\n}\n\nfunction formatHour12(d, p) {\n  return pad$1(d.getHours() % 12 || 12, p, 2);\n}\n\nfunction formatDayOfYear(d, p) {\n  return pad$1(1 + day.count(year(d), d), p, 3);\n}\n\nfunction formatMilliseconds(d, p) {\n  return pad$1(d.getMilliseconds(), p, 3);\n}\n\nfunction formatMicroseconds(d, p) {\n  return formatMilliseconds(d, p) + \"000\";\n}\n\nfunction formatMonthNumber(d, p) {\n  return pad$1(d.getMonth() + 1, p, 2);\n}\n\nfunction formatMinutes(d, p) {\n  return pad$1(d.getMinutes(), p, 2);\n}\n\nfunction formatSeconds(d, p) {\n  return pad$1(d.getSeconds(), p, 2);\n}\n\nfunction formatWeekdayNumberMonday(d) {\n  var day = d.getDay();\n  return day === 0 ? 7 : day;\n}\n\nfunction formatWeekNumberSunday(d, p) {\n  return pad$1(sunday.count(year(d) - 1, d), p, 2);\n}\n\nfunction formatWeekNumberISO(d, p) {\n  var day = d.getDay();\n  d = (day >= 4 || day === 0) ? thursday(d) : thursday.ceil(d);\n  return pad$1(thursday.count(year(d), d) + (year(d).getDay() === 4), p, 2);\n}\n\nfunction formatWeekdayNumberSunday(d) {\n  return d.getDay();\n}\n\nfunction formatWeekNumberMonday(d, p) {\n  return pad$1(monday.count(year(d) - 1, d), p, 2);\n}\n\nfunction formatYear$1(d, p) {\n  return pad$1(d.getFullYear() % 100, p, 2);\n}\n\nfunction formatFullYear(d, p) {\n  return pad$1(d.getFullYear() % 10000, p, 4);\n}\n\nfunction formatZone(d) {\n  var z = d.getTimezoneOffset();\n  return (z > 0 ? \"-\" : (z *= -1, \"+\"))\n      + pad$1(z / 60 | 0, \"0\", 2)\n      + pad$1(z % 60, \"0\", 2);\n}\n\nfunction formatUTCDayOfMonth(d, p) {\n  return pad$1(d.getUTCDate(), p, 2);\n}\n\nfunction formatUTCHour24(d, p) {\n  return pad$1(d.getUTCHours(), p, 2);\n}\n\nfunction formatUTCHour12(d, p) {\n  return pad$1(d.getUTCHours() % 12 || 12, p, 2);\n}\n\nfunction formatUTCDayOfYear(d, p) {\n  return pad$1(1 + utcDay.count(utcYear(d), d), p, 3);\n}\n\nfunction formatUTCMilliseconds(d, p) {\n  return pad$1(d.getUTCMilliseconds(), p, 3);\n}\n\nfunction formatUTCMicroseconds(d, p) {\n  return formatUTCMilliseconds(d, p) + \"000\";\n}\n\nfunction formatUTCMonthNumber(d, p) {\n  return pad$1(d.getUTCMonth() + 1, p, 2);\n}\n\nfunction formatUTCMinutes(d, p) {\n  return pad$1(d.getUTCMinutes(), p, 2);\n}\n\nfunction formatUTCSeconds(d, p) {\n  return pad$1(d.getUTCSeconds(), p, 2);\n}\n\nfunction formatUTCWeekdayNumberMonday(d) {\n  var dow = d.getUTCDay();\n  return dow === 0 ? 7 : dow;\n}\n\nfunction formatUTCWeekNumberSunday(d, p) {\n  return pad$1(utcSunday.count(utcYear(d) - 1, d), p, 2);\n}\n\nfunction formatUTCWeekNumberISO(d, p) {\n  var day = d.getUTCDay();\n  d = (day >= 4 || day === 0) ? utcThursday(d) : utcThursday.ceil(d);\n  return pad$1(utcThursday.count(utcYear(d), d) + (utcYear(d).getUTCDay() === 4), p, 2);\n}\n\nfunction formatUTCWeekdayNumberSunday(d) {\n  return d.getUTCDay();\n}\n\nfunction formatUTCWeekNumberMonday(d, p) {\n  return pad$1(utcMonday.count(utcYear(d) - 1, d), p, 2);\n}\n\nfunction formatUTCYear(d, p) {\n  return pad$1(d.getUTCFullYear() % 100, p, 2);\n}\n\nfunction formatUTCFullYear(d, p) {\n  return pad$1(d.getUTCFullYear() % 10000, p, 4);\n}\n\nfunction formatUTCZone() {\n  return \"+0000\";\n}\n\nfunction formatLiteralPercent() {\n  return \"%\";\n}\n\nfunction formatUnixTimestamp(d) {\n  return +d;\n}\n\nfunction formatUnixTimestampSeconds(d) {\n  return Math.floor(+d / 1000);\n}\n\nvar locale$1;\n\ndefaultLocale$1({\n  dateTime: \"%x, %X\",\n  date: \"%-m/%-d/%Y\",\n  time: \"%-I:%M:%S %p\",\n  periods: [\"AM\", \"PM\"],\n  days: [\"Sunday\", \"Monday\", \"Tuesday\", \"Wednesday\", \"Thursday\", \"Friday\", \"Saturday\"],\n  shortDays: [\"Sun\", \"Mon\", \"Tue\", \"Wed\", \"Thu\", \"Fri\", \"Sat\"],\n  months: [\"January\", \"February\", \"March\", \"April\", \"May\", \"June\", \"July\", \"August\", \"September\", \"October\", \"November\", \"December\"],\n  shortMonths: [\"Jan\", \"Feb\", \"Mar\", \"Apr\", \"May\", \"Jun\", \"Jul\", \"Aug\", \"Sep\", \"Oct\", \"Nov\", \"Dec\"]\n});\n\nfunction defaultLocale$1(definition) {\n  locale$1 = formatLocale$1(definition);\n  exports.timeFormat = locale$1.format;\n  exports.timeParse = locale$1.parse;\n  exports.utcFormat = locale$1.utcFormat;\n  exports.utcParse = locale$1.utcParse;\n  return locale$1;\n}\n\nvar isoSpecifier = \"%Y-%m-%dT%H:%M:%S.%LZ\";\n\nfunction formatIsoNative(date) {\n  return date.toISOString();\n}\n\nvar formatIso = Date.prototype.toISOString\n    ? formatIsoNative\n    : exports.utcFormat(isoSpecifier);\n\nfunction parseIsoNative(string) {\n  var date = new Date(string);\n  return isNaN(date) ? null : date;\n}\n\nvar parseIso = +new Date(\"2000-01-01T00:00:00.000Z\")\n    ? parseIsoNative\n    : exports.utcParse(isoSpecifier);\n\nvar durationSecond$1 = 1000,\n    durationMinute$1 = durationSecond$1 * 60,\n    durationHour$1 = durationMinute$1 * 60,\n    durationDay$1 = durationHour$1 * 24,\n    durationWeek$1 = durationDay$1 * 7,\n    durationMonth = durationDay$1 * 30,\n    durationYear = durationDay$1 * 365;\n\nfunction date$1(t) {\n  return new Date(t);\n}\n\nfunction number$3(t) {\n  return t instanceof Date ? +t : +new Date(+t);\n}\n\nfunction calendar(year, month, week, day, hour, minute, second, millisecond, format) {\n  var scale = continuous(identity$6, identity$6),\n      invert = scale.invert,\n      domain = scale.domain;\n\n  var formatMillisecond = format(\".%L\"),\n      formatSecond = format(\":%S\"),\n      formatMinute = format(\"%I:%M\"),\n      formatHour = format(\"%I %p\"),\n      formatDay = format(\"%a %d\"),\n      formatWeek = format(\"%b %d\"),\n      formatMonth = format(\"%B\"),\n      formatYear = format(\"%Y\");\n\n  var tickIntervals = [\n    [second,  1,      durationSecond$1],\n    [second,  5,  5 * durationSecond$1],\n    [second, 15, 15 * durationSecond$1],\n    [second, 30, 30 * durationSecond$1],\n    [minute,  1,      durationMinute$1],\n    [minute,  5,  5 * durationMinute$1],\n    [minute, 15, 15 * durationMinute$1],\n    [minute, 30, 30 * durationMinute$1],\n    [  hour,  1,      durationHour$1  ],\n    [  hour,  3,  3 * durationHour$1  ],\n    [  hour,  6,  6 * durationHour$1  ],\n    [  hour, 12, 12 * durationHour$1  ],\n    [   day,  1,      durationDay$1   ],\n    [   day,  2,  2 * durationDay$1   ],\n    [  week,  1,      durationWeek$1  ],\n    [ month,  1,      durationMonth ],\n    [ month,  3,  3 * durationMonth ],\n    [  year,  1,      durationYear  ]\n  ];\n\n  function tickFormat(date) {\n    return (second(date) < date ? formatMillisecond\n        : minute(date) < date ? formatSecond\n        : hour(date) < date ? formatMinute\n        : day(date) < date ? formatHour\n        : month(date) < date ? (week(date) < date ? formatDay : formatWeek)\n        : year(date) < date ? formatMonth\n        : formatYear)(date);\n  }\n\n  function tickInterval(interval, start, stop, step) {\n    if (interval == null) interval = 10;\n\n    // If a desired tick count is specified, pick a reasonable tick interval\n    // based on the extent of the domain and a rough estimate of tick size.\n    // Otherwise, assume interval is already a time interval and use it.\n    if (typeof interval === \"number\") {\n      var target = Math.abs(stop - start) / interval,\n          i = bisector(function(i) { return i[2]; }).right(tickIntervals, target);\n      if (i === tickIntervals.length) {\n        step = tickStep(start / durationYear, stop / durationYear, interval);\n        interval = year;\n      } else if (i) {\n        i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];\n        step = i[1];\n        interval = i[0];\n      } else {\n        step = Math.max(tickStep(start, stop, interval), 1);\n        interval = millisecond;\n      }\n    }\n\n    return step == null ? interval : interval.every(step);\n  }\n\n  scale.invert = function(y) {\n    return new Date(invert(y));\n  };\n\n  scale.domain = function(_) {\n    return arguments.length ? domain(map$3.call(_, number$3)) : domain().map(date$1);\n  };\n\n  scale.ticks = function(interval, step) {\n    var d = domain(),\n        t0 = d[0],\n        t1 = d[d.length - 1],\n        r = t1 < t0,\n        t;\n    if (r) t = t0, t0 = t1, t1 = t;\n    t = tickInterval(interval, t0, t1, step);\n    t = t ? t.range(t0, t1 + 1) : []; // inclusive stop\n    return r ? t.reverse() : t;\n  };\n\n  scale.tickFormat = function(count, specifier) {\n    return specifier == null ? tickFormat : format(specifier);\n  };\n\n  scale.nice = function(interval, step) {\n    var d = domain();\n    return (interval = tickInterval(interval, d[0], d[d.length - 1], step))\n        ? domain(nice(d, interval))\n        : scale;\n  };\n\n  scale.copy = function() {\n    return copy(scale, calendar(year, month, week, day, hour, minute, second, millisecond, format));\n  };\n\n  return scale;\n}\n\nfunction time() {\n  return initRange.apply(calendar(year, month, sunday, day, hour, minute, second, millisecond, exports.timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]), arguments);\n}\n\nfunction utcTime() {\n  return initRange.apply(calendar(utcYear, utcMonth, utcSunday, utcDay, utcHour, utcMinute, second, millisecond, exports.utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]), arguments);\n}\n\nfunction transformer$2() {\n  var x0 = 0,\n      x1 = 1,\n      t0,\n      t1,\n      k10,\n      transform,\n      interpolator = identity$6,\n      clamp = false,\n      unknown;\n\n  function scale(x) {\n    return isNaN(x = +x) ? unknown : interpolator(k10 === 0 ? 0.5 : (x = (transform(x) - t0) * k10, clamp ? Math.max(0, Math.min(1, x)) : x));\n  }\n\n  scale.domain = function(_) {\n    return arguments.length ? (t0 = transform(x0 = +_[0]), t1 = transform(x1 = +_[1]), k10 = t0 === t1 ? 0 : 1 / (t1 - t0), scale) : [x0, x1];\n  };\n\n  scale.clamp = function(_) {\n    return arguments.length ? (clamp = !!_, scale) : clamp;\n  };\n\n  scale.interpolator = function(_) {\n    return arguments.length ? (interpolator = _, scale) : interpolator;\n  };\n\n  scale.unknown = function(_) {\n    return arguments.length ? (unknown = _, scale) : unknown;\n  };\n\n  return function(t) {\n    transform = t, t0 = t(x0), t1 = t(x1), k10 = t0 === t1 ? 0 : 1 / (t1 - t0);\n    return scale;\n  };\n}\n\nfunction copy$1(source, target) {\n  return target\n      .domain(source.domain())\n      .interpolator(source.interpolator())\n      .clamp(source.clamp())\n      .unknown(source.unknown());\n}\n\nfunction sequential() {\n  var scale = linearish(transformer$2()(identity$6));\n\n  scale.copy = function() {\n    return copy$1(scale, sequential());\n  };\n\n  return initInterpolator.apply(scale, arguments);\n}\n\nfunction sequentialLog() {\n  var scale = loggish(transformer$2()).domain([1, 10]);\n\n  scale.copy = function() {\n    return copy$1(scale, sequentialLog()).base(scale.base());\n  };\n\n  return initInterpolator.apply(scale, arguments);\n}\n\nfunction sequentialSymlog() {\n  var scale = symlogish(transformer$2());\n\n  scale.copy = function() {\n    return copy$1(scale, sequentialSymlog()).constant(scale.constant());\n  };\n\n  return initInterpolator.apply(scale, arguments);\n}\n\nfunction sequentialPow() {\n  var scale = powish(transformer$2());\n\n  scale.copy = function() {\n    return copy$1(scale, sequentialPow()).exponent(scale.exponent());\n  };\n\n  return initInterpolator.apply(scale, arguments);\n}\n\nfunction sequentialSqrt() {\n  return sequentialPow.apply(null, arguments).exponent(0.5);\n}\n\nfunction sequentialQuantile() {\n  var domain = [],\n      interpolator = identity$6;\n\n  function scale(x) {\n    if (!isNaN(x = +x)) return interpolator((bisectRight(domain, x) - 1) / (domain.length - 1));\n  }\n\n  scale.domain = function(_) {\n    if (!arguments.length) return domain.slice();\n    domain = [];\n    for (var i = 0, n = _.length, d; i < n; ++i) if (d = _[i], d != null && !isNaN(d = +d)) domain.push(d);\n    domain.sort(ascending);\n    return scale;\n  };\n\n  scale.interpolator = function(_) {\n    return arguments.length ? (interpolator = _, scale) : interpolator;\n  };\n\n  scale.copy = function() {\n    return sequentialQuantile(interpolator).domain(domain);\n  };\n\n  return initInterpolator.apply(scale, arguments);\n}\n\nfunction transformer$3() {\n  var x0 = 0,\n      x1 = 0.5,\n      x2 = 1,\n      t0,\n      t1,\n      t2,\n      k10,\n      k21,\n      interpolator = identity$6,\n      transform,\n      clamp = false,\n      unknown;\n\n  function scale(x) {\n    return isNaN(x = +x) ? unknown : (x = 0.5 + ((x = +transform(x)) - t1) * (x < t1 ? k10 : k21), interpolator(clamp ? Math.max(0, Math.min(1, x)) : x));\n  }\n\n  scale.domain = function(_) {\n    return arguments.length ? (t0 = transform(x0 = +_[0]), t1 = transform(x1 = +_[1]), t2 = transform(x2 = +_[2]), k10 = t0 === t1 ? 0 : 0.5 / (t1 - t0), k21 = t1 === t2 ? 0 : 0.5 / (t2 - t1), scale) : [x0, x1, x2];\n  };\n\n  scale.clamp = function(_) {\n    return arguments.length ? (clamp = !!_, scale) : clamp;\n  };\n\n  scale.interpolator = function(_) {\n    return arguments.length ? (interpolator = _, scale) : interpolator;\n  };\n\n  scale.unknown = function(_) {\n    return arguments.length ? (unknown = _, scale) : unknown;\n  };\n\n  return function(t) {\n    transform = t, t0 = t(x0), t1 = t(x1), t2 = t(x2), k10 = t0 === t1 ? 0 : 0.5 / (t1 - t0), k21 = t1 === t2 ? 0 : 0.5 / (t2 - t1);\n    return scale;\n  };\n}\n\nfunction diverging() {\n  var scale = linearish(transformer$3()(identity$6));\n\n  scale.copy = function() {\n    return copy$1(scale, diverging());\n  };\n\n  return initInterpolator.apply(scale, arguments);\n}\n\nfunction divergingLog() {\n  var scale = loggish(transformer$3()).domain([0.1, 1, 10]);\n\n  scale.copy = function() {\n    return copy$1(scale, divergingLog()).base(scale.base());\n  };\n\n  return initInterpolator.apply(scale, arguments);\n}\n\nfunction divergingSymlog() {\n  var scale = symlogish(transformer$3());\n\n  scale.copy = function() {\n    return copy$1(scale, divergingSymlog()).constant(scale.constant());\n  };\n\n  return initInterpolator.apply(scale, arguments);\n}\n\nfunction divergingPow() {\n  var scale = powish(transformer$3());\n\n  scale.copy = function() {\n    return copy$1(scale, divergingPow()).exponent(scale.exponent());\n  };\n\n  return initInterpolator.apply(scale, arguments);\n}\n\nfunction divergingSqrt() {\n  return divergingPow.apply(null, arguments).exponent(0.5);\n}\n\nfunction colors(specifier) {\n  var n = specifier.length / 6 | 0, colors = new Array(n), i = 0;\n  while (i < n) colors[i] = \"#\" + specifier.slice(i * 6, ++i * 6);\n  return colors;\n}\n\nvar category10 = colors(\"1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf\");\n\nvar Accent = colors(\"7fc97fbeaed4fdc086ffff99386cb0f0027fbf5b17666666\");\n\nvar Dark2 = colors(\"1b9e77d95f027570b3e7298a66a61ee6ab02a6761d666666\");\n\nvar Paired = colors(\"a6cee31f78b4b2df8a33a02cfb9a99e31a1cfdbf6fff7f00cab2d66a3d9affff99b15928\");\n\nvar Pastel1 = colors(\"fbb4aeb3cde3ccebc5decbe4fed9a6ffffcce5d8bdfddaecf2f2f2\");\n\nvar Pastel2 = colors(\"b3e2cdfdcdaccbd5e8f4cae4e6f5c9fff2aef1e2cccccccc\");\n\nvar Set1 = colors(\"e41a1c377eb84daf4a984ea3ff7f00ffff33a65628f781bf999999\");\n\nvar Set2 = colors(\"66c2a5fc8d628da0cbe78ac3a6d854ffd92fe5c494b3b3b3\");\n\nvar Set3 = colors(\"8dd3c7ffffb3bebadafb807280b1d3fdb462b3de69fccde5d9d9d9bc80bdccebc5ffed6f\");\n\nvar Tableau10 = colors(\"4e79a7f28e2ce1575976b7b259a14fedc949af7aa1ff9da79c755fbab0ab\");\n\nfunction ramp(scheme) {\n  return rgbBasis(scheme[scheme.length - 1]);\n}\n\nvar scheme = new Array(3).concat(\n  \"d8b365f5f5f55ab4ac\",\n  \"a6611adfc27d80cdc1018571\",\n  \"a6611adfc27df5f5f580cdc1018571\",\n  \"8c510ad8b365f6e8c3c7eae55ab4ac01665e\",\n  \"8c510ad8b365f6e8c3f5f5f5c7eae55ab4ac01665e\",\n  \"8c510abf812ddfc27df6e8c3c7eae580cdc135978f01665e\",\n  \"8c510abf812ddfc27df6e8c3f5f5f5c7eae580cdc135978f01665e\",\n  \"5430058c510abf812ddfc27df6e8c3c7eae580cdc135978f01665e003c30\",\n  \"5430058c510abf812ddfc27df6e8c3f5f5f5c7eae580cdc135978f01665e003c30\"\n).map(colors);\n\nvar BrBG = ramp(scheme);\n\nvar scheme$1 = new Array(3).concat(\n  \"af8dc3f7f7f77fbf7b\",\n  \"7b3294c2a5cfa6dba0008837\",\n  \"7b3294c2a5cff7f7f7a6dba0008837\",\n  \"762a83af8dc3e7d4e8d9f0d37fbf7b1b7837\",\n  \"762a83af8dc3e7d4e8f7f7f7d9f0d37fbf7b1b7837\",\n  \"762a839970abc2a5cfe7d4e8d9f0d3a6dba05aae611b7837\",\n  \"762a839970abc2a5cfe7d4e8f7f7f7d9f0d3a6dba05aae611b7837\",\n  \"40004b762a839970abc2a5cfe7d4e8d9f0d3a6dba05aae611b783700441b\",\n  \"40004b762a839970abc2a5cfe7d4e8f7f7f7d9f0d3a6dba05aae611b783700441b\"\n).map(colors);\n\nvar PRGn = ramp(scheme$1);\n\nvar scheme$2 = new Array(3).concat(\n  \"e9a3c9f7f7f7a1d76a\",\n  \"d01c8bf1b6dab8e1864dac26\",\n  \"d01c8bf1b6daf7f7f7b8e1864dac26\",\n  \"c51b7de9a3c9fde0efe6f5d0a1d76a4d9221\",\n  \"c51b7de9a3c9fde0eff7f7f7e6f5d0a1d76a4d9221\",\n  \"c51b7dde77aef1b6dafde0efe6f5d0b8e1867fbc414d9221\",\n  \"c51b7dde77aef1b6dafde0eff7f7f7e6f5d0b8e1867fbc414d9221\",\n  \"8e0152c51b7dde77aef1b6dafde0efe6f5d0b8e1867fbc414d9221276419\",\n  \"8e0152c51b7dde77aef1b6dafde0eff7f7f7e6f5d0b8e1867fbc414d9221276419\"\n).map(colors);\n\nvar PiYG = ramp(scheme$2);\n\nvar scheme$3 = new Array(3).concat(\n  \"998ec3f7f7f7f1a340\",\n  \"5e3c99b2abd2fdb863e66101\",\n  \"5e3c99b2abd2f7f7f7fdb863e66101\",\n  \"542788998ec3d8daebfee0b6f1a340b35806\",\n  \"542788998ec3d8daebf7f7f7fee0b6f1a340b35806\",\n  \"5427888073acb2abd2d8daebfee0b6fdb863e08214b35806\",\n  \"5427888073acb2abd2d8daebf7f7f7fee0b6fdb863e08214b35806\",\n  \"2d004b5427888073acb2abd2d8daebfee0b6fdb863e08214b358067f3b08\",\n  \"2d004b5427888073acb2abd2d8daebf7f7f7fee0b6fdb863e08214b358067f3b08\"\n).map(colors);\n\nvar PuOr = ramp(scheme$3);\n\nvar scheme$4 = new Array(3).concat(\n  \"ef8a62f7f7f767a9cf\",\n  \"ca0020f4a58292c5de0571b0\",\n  \"ca0020f4a582f7f7f792c5de0571b0\",\n  \"b2182bef8a62fddbc7d1e5f067a9cf2166ac\",\n  \"b2182bef8a62fddbc7f7f7f7d1e5f067a9cf2166ac\",\n  \"b2182bd6604df4a582fddbc7d1e5f092c5de4393c32166ac\",\n  \"b2182bd6604df4a582fddbc7f7f7f7d1e5f092c5de4393c32166ac\",\n  \"67001fb2182bd6604df4a582fddbc7d1e5f092c5de4393c32166ac053061\",\n  \"67001fb2182bd6604df4a582fddbc7f7f7f7d1e5f092c5de4393c32166ac053061\"\n).map(colors);\n\nvar RdBu = ramp(scheme$4);\n\nvar scheme$5 = new Array(3).concat(\n  \"ef8a62ffffff999999\",\n  \"ca0020f4a582bababa404040\",\n  \"ca0020f4a582ffffffbababa404040\",\n  \"b2182bef8a62fddbc7e0e0e09999994d4d4d\",\n  \"b2182bef8a62fddbc7ffffffe0e0e09999994d4d4d\",\n  \"b2182bd6604df4a582fddbc7e0e0e0bababa8787874d4d4d\",\n  \"b2182bd6604df4a582fddbc7ffffffe0e0e0bababa8787874d4d4d\",\n  \"67001fb2182bd6604df4a582fddbc7e0e0e0bababa8787874d4d4d1a1a1a\",\n  \"67001fb2182bd6604df4a582fddbc7ffffffe0e0e0bababa8787874d4d4d1a1a1a\"\n).map(colors);\n\nvar RdGy = ramp(scheme$5);\n\nvar scheme$6 = new Array(3).concat(\n  \"fc8d59ffffbf91bfdb\",\n  \"d7191cfdae61abd9e92c7bb6\",\n  \"d7191cfdae61ffffbfabd9e92c7bb6\",\n  \"d73027fc8d59fee090e0f3f891bfdb4575b4\",\n  \"d73027fc8d59fee090ffffbfe0f3f891bfdb4575b4\",\n  \"d73027f46d43fdae61fee090e0f3f8abd9e974add14575b4\",\n  \"d73027f46d43fdae61fee090ffffbfe0f3f8abd9e974add14575b4\",\n  \"a50026d73027f46d43fdae61fee090e0f3f8abd9e974add14575b4313695\",\n  \"a50026d73027f46d43fdae61fee090ffffbfe0f3f8abd9e974add14575b4313695\"\n).map(colors);\n\nvar RdYlBu = ramp(scheme$6);\n\nvar scheme$7 = new Array(3).concat(\n  \"fc8d59ffffbf91cf60\",\n  \"d7191cfdae61a6d96a1a9641\",\n  \"d7191cfdae61ffffbfa6d96a1a9641\",\n  \"d73027fc8d59fee08bd9ef8b91cf601a9850\",\n  \"d73027fc8d59fee08bffffbfd9ef8b91cf601a9850\",\n  \"d73027f46d43fdae61fee08bd9ef8ba6d96a66bd631a9850\",\n  \"d73027f46d43fdae61fee08bffffbfd9ef8ba6d96a66bd631a9850\",\n  \"a50026d73027f46d43fdae61fee08bd9ef8ba6d96a66bd631a9850006837\",\n  \"a50026d73027f46d43fdae61fee08bffffbfd9ef8ba6d96a66bd631a9850006837\"\n).map(colors);\n\nvar RdYlGn = ramp(scheme$7);\n\nvar scheme$8 = new Array(3).concat(\n  \"fc8d59ffffbf99d594\",\n  \"d7191cfdae61abdda42b83ba\",\n  \"d7191cfdae61ffffbfabdda42b83ba\",\n  \"d53e4ffc8d59fee08be6f59899d5943288bd\",\n  \"d53e4ffc8d59fee08bffffbfe6f59899d5943288bd\",\n  \"d53e4ff46d43fdae61fee08be6f598abdda466c2a53288bd\",\n  \"d53e4ff46d43fdae61fee08bffffbfe6f598abdda466c2a53288bd\",\n  \"9e0142d53e4ff46d43fdae61fee08be6f598abdda466c2a53288bd5e4fa2\",\n  \"9e0142d53e4ff46d43fdae61fee08bffffbfe6f598abdda466c2a53288bd5e4fa2\"\n).map(colors);\n\nvar Spectral = ramp(scheme$8);\n\nvar scheme$9 = new Array(3).concat(\n  \"e5f5f999d8c92ca25f\",\n  \"edf8fbb2e2e266c2a4238b45\",\n  \"edf8fbb2e2e266c2a42ca25f006d2c\",\n  \"edf8fbccece699d8c966c2a42ca25f006d2c\",\n  \"edf8fbccece699d8c966c2a441ae76238b45005824\",\n  \"f7fcfde5f5f9ccece699d8c966c2a441ae76238b45005824\",\n  \"f7fcfde5f5f9ccece699d8c966c2a441ae76238b45006d2c00441b\"\n).map(colors);\n\nvar BuGn = ramp(scheme$9);\n\nvar scheme$a = new Array(3).concat(\n  \"e0ecf49ebcda8856a7\",\n  \"edf8fbb3cde38c96c688419d\",\n  \"edf8fbb3cde38c96c68856a7810f7c\",\n  \"edf8fbbfd3e69ebcda8c96c68856a7810f7c\",\n  \"edf8fbbfd3e69ebcda8c96c68c6bb188419d6e016b\",\n  \"f7fcfde0ecf4bfd3e69ebcda8c96c68c6bb188419d6e016b\",\n  \"f7fcfde0ecf4bfd3e69ebcda8c96c68c6bb188419d810f7c4d004b\"\n).map(colors);\n\nvar BuPu = ramp(scheme$a);\n\nvar scheme$b = new Array(3).concat(\n  \"e0f3dba8ddb543a2ca\",\n  \"f0f9e8bae4bc7bccc42b8cbe\",\n  \"f0f9e8bae4bc7bccc443a2ca0868ac\",\n  \"f0f9e8ccebc5a8ddb57bccc443a2ca0868ac\",\n  \"f0f9e8ccebc5a8ddb57bccc44eb3d32b8cbe08589e\",\n  \"f7fcf0e0f3dbccebc5a8ddb57bccc44eb3d32b8cbe08589e\",\n  \"f7fcf0e0f3dbccebc5a8ddb57bccc44eb3d32b8cbe0868ac084081\"\n).map(colors);\n\nvar GnBu = ramp(scheme$b);\n\nvar scheme$c = new Array(3).concat(\n  \"fee8c8fdbb84e34a33\",\n  \"fef0d9fdcc8afc8d59d7301f\",\n  \"fef0d9fdcc8afc8d59e34a33b30000\",\n  \"fef0d9fdd49efdbb84fc8d59e34a33b30000\",\n  \"fef0d9fdd49efdbb84fc8d59ef6548d7301f990000\",\n  \"fff7ecfee8c8fdd49efdbb84fc8d59ef6548d7301f990000\",\n  \"fff7ecfee8c8fdd49efdbb84fc8d59ef6548d7301fb300007f0000\"\n).map(colors);\n\nvar OrRd = ramp(scheme$c);\n\nvar scheme$d = new Array(3).concat(\n  \"ece2f0a6bddb1c9099\",\n  \"f6eff7bdc9e167a9cf02818a\",\n  \"f6eff7bdc9e167a9cf1c9099016c59\",\n  \"f6eff7d0d1e6a6bddb67a9cf1c9099016c59\",\n  \"f6eff7d0d1e6a6bddb67a9cf3690c002818a016450\",\n  \"fff7fbece2f0d0d1e6a6bddb67a9cf3690c002818a016450\",\n  \"fff7fbece2f0d0d1e6a6bddb67a9cf3690c002818a016c59014636\"\n).map(colors);\n\nvar PuBuGn = ramp(scheme$d);\n\nvar scheme$e = new Array(3).concat(\n  \"ece7f2a6bddb2b8cbe\",\n  \"f1eef6bdc9e174a9cf0570b0\",\n  \"f1eef6bdc9e174a9cf2b8cbe045a8d\",\n  \"f1eef6d0d1e6a6bddb74a9cf2b8cbe045a8d\",\n  \"f1eef6d0d1e6a6bddb74a9cf3690c00570b0034e7b\",\n  \"fff7fbece7f2d0d1e6a6bddb74a9cf3690c00570b0034e7b\",\n  \"fff7fbece7f2d0d1e6a6bddb74a9cf3690c00570b0045a8d023858\"\n).map(colors);\n\nvar PuBu = ramp(scheme$e);\n\nvar scheme$f = new Array(3).concat(\n  \"e7e1efc994c7dd1c77\",\n  \"f1eef6d7b5d8df65b0ce1256\",\n  \"f1eef6d7b5d8df65b0dd1c77980043\",\n  \"f1eef6d4b9dac994c7df65b0dd1c77980043\",\n  \"f1eef6d4b9dac994c7df65b0e7298ace125691003f\",\n  \"f7f4f9e7e1efd4b9dac994c7df65b0e7298ace125691003f\",\n  \"f7f4f9e7e1efd4b9dac994c7df65b0e7298ace125698004367001f\"\n).map(colors);\n\nvar PuRd = ramp(scheme$f);\n\nvar scheme$g = new Array(3).concat(\n  \"fde0ddfa9fb5c51b8a\",\n  \"feebe2fbb4b9f768a1ae017e\",\n  \"feebe2fbb4b9f768a1c51b8a7a0177\",\n  \"feebe2fcc5c0fa9fb5f768a1c51b8a7a0177\",\n  \"feebe2fcc5c0fa9fb5f768a1dd3497ae017e7a0177\",\n  \"fff7f3fde0ddfcc5c0fa9fb5f768a1dd3497ae017e7a0177\",\n  \"fff7f3fde0ddfcc5c0fa9fb5f768a1dd3497ae017e7a017749006a\"\n).map(colors);\n\nvar RdPu = ramp(scheme$g);\n\nvar scheme$h = new Array(3).concat(\n  \"edf8b17fcdbb2c7fb8\",\n  \"ffffcca1dab441b6c4225ea8\",\n  \"ffffcca1dab441b6c42c7fb8253494\",\n  \"ffffccc7e9b47fcdbb41b6c42c7fb8253494\",\n  \"ffffccc7e9b47fcdbb41b6c41d91c0225ea80c2c84\",\n  \"ffffd9edf8b1c7e9b47fcdbb41b6c41d91c0225ea80c2c84\",\n  \"ffffd9edf8b1c7e9b47fcdbb41b6c41d91c0225ea8253494081d58\"\n).map(colors);\n\nvar YlGnBu = ramp(scheme$h);\n\nvar scheme$i = new Array(3).concat(\n  \"f7fcb9addd8e31a354\",\n  \"ffffccc2e69978c679238443\",\n  \"ffffccc2e69978c67931a354006837\",\n  \"ffffccd9f0a3addd8e78c67931a354006837\",\n  \"ffffccd9f0a3addd8e78c67941ab5d238443005a32\",\n  \"ffffe5f7fcb9d9f0a3addd8e78c67941ab5d238443005a32\",\n  \"ffffe5f7fcb9d9f0a3addd8e78c67941ab5d238443006837004529\"\n).map(colors);\n\nvar YlGn = ramp(scheme$i);\n\nvar scheme$j = new Array(3).concat(\n  \"fff7bcfec44fd95f0e\",\n  \"ffffd4fed98efe9929cc4c02\",\n  \"ffffd4fed98efe9929d95f0e993404\",\n  \"ffffd4fee391fec44ffe9929d95f0e993404\",\n  \"ffffd4fee391fec44ffe9929ec7014cc4c028c2d04\",\n  \"ffffe5fff7bcfee391fec44ffe9929ec7014cc4c028c2d04\",\n  \"ffffe5fff7bcfee391fec44ffe9929ec7014cc4c02993404662506\"\n).map(colors);\n\nvar YlOrBr = ramp(scheme$j);\n\nvar scheme$k = new Array(3).concat(\n  \"ffeda0feb24cf03b20\",\n  \"ffffb2fecc5cfd8d3ce31a1c\",\n  \"ffffb2fecc5cfd8d3cf03b20bd0026\",\n  \"ffffb2fed976feb24cfd8d3cf03b20bd0026\",\n  \"ffffb2fed976feb24cfd8d3cfc4e2ae31a1cb10026\",\n  \"ffffccffeda0fed976feb24cfd8d3cfc4e2ae31a1cb10026\",\n  \"ffffccffeda0fed976feb24cfd8d3cfc4e2ae31a1cbd0026800026\"\n).map(colors);\n\nvar YlOrRd = ramp(scheme$k);\n\nvar scheme$l = new Array(3).concat(\n  \"deebf79ecae13182bd\",\n  \"eff3ffbdd7e76baed62171b5\",\n  \"eff3ffbdd7e76baed63182bd08519c\",\n  \"eff3ffc6dbef9ecae16baed63182bd08519c\",\n  \"eff3ffc6dbef9ecae16baed64292c62171b5084594\",\n  \"f7fbffdeebf7c6dbef9ecae16baed64292c62171b5084594\",\n  \"f7fbffdeebf7c6dbef9ecae16baed64292c62171b508519c08306b\"\n).map(colors);\n\nvar Blues = ramp(scheme$l);\n\nvar scheme$m = new Array(3).concat(\n  \"e5f5e0a1d99b31a354\",\n  \"edf8e9bae4b374c476238b45\",\n  \"edf8e9bae4b374c47631a354006d2c\",\n  \"edf8e9c7e9c0a1d99b74c47631a354006d2c\",\n  \"edf8e9c7e9c0a1d99b74c47641ab5d238b45005a32\",\n  \"f7fcf5e5f5e0c7e9c0a1d99b74c47641ab5d238b45005a32\",\n  \"f7fcf5e5f5e0c7e9c0a1d99b74c47641ab5d238b45006d2c00441b\"\n).map(colors);\n\nvar Greens = ramp(scheme$m);\n\nvar scheme$n = new Array(3).concat(\n  \"f0f0f0bdbdbd636363\",\n  \"f7f7f7cccccc969696525252\",\n  \"f7f7f7cccccc969696636363252525\",\n  \"f7f7f7d9d9d9bdbdbd969696636363252525\",\n  \"f7f7f7d9d9d9bdbdbd969696737373525252252525\",\n  \"fffffff0f0f0d9d9d9bdbdbd969696737373525252252525\",\n  \"fffffff0f0f0d9d9d9bdbdbd969696737373525252252525000000\"\n).map(colors);\n\nvar Greys = ramp(scheme$n);\n\nvar scheme$o = new Array(3).concat(\n  \"efedf5bcbddc756bb1\",\n  \"f2f0f7cbc9e29e9ac86a51a3\",\n  \"f2f0f7cbc9e29e9ac8756bb154278f\",\n  \"f2f0f7dadaebbcbddc9e9ac8756bb154278f\",\n  \"f2f0f7dadaebbcbddc9e9ac8807dba6a51a34a1486\",\n  \"fcfbfdefedf5dadaebbcbddc9e9ac8807dba6a51a34a1486\",\n  \"fcfbfdefedf5dadaebbcbddc9e9ac8807dba6a51a354278f3f007d\"\n).map(colors);\n\nvar Purples = ramp(scheme$o);\n\nvar scheme$p = new Array(3).concat(\n  \"fee0d2fc9272de2d26\",\n  \"fee5d9fcae91fb6a4acb181d\",\n  \"fee5d9fcae91fb6a4ade2d26a50f15\",\n  \"fee5d9fcbba1fc9272fb6a4ade2d26a50f15\",\n  \"fee5d9fcbba1fc9272fb6a4aef3b2ccb181d99000d\",\n  \"fff5f0fee0d2fcbba1fc9272fb6a4aef3b2ccb181d99000d\",\n  \"fff5f0fee0d2fcbba1fc9272fb6a4aef3b2ccb181da50f1567000d\"\n).map(colors);\n\nvar Reds = ramp(scheme$p);\n\nvar scheme$q = new Array(3).concat(\n  \"fee6cefdae6be6550d\",\n  \"feeddefdbe85fd8d3cd94701\",\n  \"feeddefdbe85fd8d3ce6550da63603\",\n  \"feeddefdd0a2fdae6bfd8d3ce6550da63603\",\n  \"feeddefdd0a2fdae6bfd8d3cf16913d948018c2d04\",\n  \"fff5ebfee6cefdd0a2fdae6bfd8d3cf16913d948018c2d04\",\n  \"fff5ebfee6cefdd0a2fdae6bfd8d3cf16913d94801a636037f2704\"\n).map(colors);\n\nvar Oranges = ramp(scheme$q);\n\nfunction cividis(t) {\n  t = Math.max(0, Math.min(1, t));\n  return \"rgb(\"\n      + Math.max(0, Math.min(255, Math.round(-4.54 - t * (35.34 - t * (2381.73 - t * (6402.7 - t * (7024.72 - t * 2710.57))))))) + \", \"\n      + Math.max(0, Math.min(255, Math.round(32.49 + t * (170.73 + t * (52.82 - t * (131.46 - t * (176.58 - t * 67.37))))))) + \", \"\n      + Math.max(0, Math.min(255, Math.round(81.24 + t * (442.36 - t * (2482.43 - t * (6167.24 - t * (6614.94 - t * 2475.67)))))))\n      + \")\";\n}\n\nvar cubehelix$3 = cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0));\n\nvar warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8));\n\nvar cool = cubehelixLong(cubehelix(260, 0.75, 0.35), cubehelix(80, 1.50, 0.8));\n\nvar c = cubehelix();\n\nfunction rainbow(t) {\n  if (t < 0 || t > 1) t -= Math.floor(t);\n  var ts = Math.abs(t - 0.5);\n  c.h = 360 * t - 100;\n  c.s = 1.5 - 1.5 * ts;\n  c.l = 0.8 - 0.9 * ts;\n  return c + \"\";\n}\n\nvar c$1 = rgb(),\n    pi_1_3 = Math.PI / 3,\n    pi_2_3 = Math.PI * 2 / 3;\n\nfunction sinebow(t) {\n  var x;\n  t = (0.5 - t) * Math.PI;\n  c$1.r = 255 * (x = Math.sin(t)) * x;\n  c$1.g = 255 * (x = Math.sin(t + pi_1_3)) * x;\n  c$1.b = 255 * (x = Math.sin(t + pi_2_3)) * x;\n  return c$1 + \"\";\n}\n\nfunction turbo(t) {\n  t = Math.max(0, Math.min(1, t));\n  return \"rgb(\"\n      + Math.max(0, Math.min(255, Math.round(34.61 + t * (1172.33 - t * (10793.56 - t * (33300.12 - t * (38394.49 - t * 14825.05))))))) + \", \"\n      + Math.max(0, Math.min(255, Math.round(23.31 + t * (557.33 + t * (1225.33 - t * (3574.96 - t * (1073.77 + t * 707.56))))))) + \", \"\n      + Math.max(0, Math.min(255, Math.round(27.2 + t * (3211.1 - t * (15327.97 - t * (27814 - t * (22569.18 - t * 6838.66)))))))\n      + \")\";\n}\n\nfunction ramp$1(range) {\n  var n = range.length;\n  return function(t) {\n    return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];\n  };\n}\n\nvar viridis = ramp$1(colors(\"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\"));\n\nvar magma = ramp$1(colors(\"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\"));\n\nvar inferno = ramp$1(colors(\"00000401000501010601010802010a02020c02020e03021004031204031405041706041907051b08051d09061f0a07220b07240c08260d08290e092b10092d110a30120a32140b34150b37160b39180c3c190c3e1b0c411c0c431e0c451f0c48210c4a230c4c240c4f260c51280b53290b552b0b572d0b592f0a5b310a5c320a5e340a5f3609613809623909633b09643d09653e0966400a67420a68440a68450a69470b6a490b6a4a0c6b4c0c6b4d0d6c4f0d6c510e6c520e6d540f6d550f6d57106e59106e5a116e5c126e5d126e5f136e61136e62146e64156e65156e67166e69166e6a176e6c186e6d186e6f196e71196e721a6e741a6e751b6e771c6d781c6d7a1d6d7c1d6d7d1e6d7f1e6c801f6c82206c84206b85216b87216b88226a8a226a8c23698d23698f24699025689225689326679526679727669827669a28659b29649d29649f2a63a02a63a22b62a32c61a52c60a62d60a82e5fa92e5eab2f5ead305dae305cb0315bb1325ab3325ab43359b63458b73557b93556ba3655bc3754bd3853bf3952c03a51c13a50c33b4fc43c4ec63d4dc73e4cc83f4bca404acb4149cc4248ce4347cf4446d04545d24644d34743d44842d54a41d74b3fd84c3ed94d3dda4e3cdb503bdd513ade5238df5337e05536e15635e25734e35933e45a31e55c30e65d2fe75e2ee8602de9612bea632aeb6429eb6628ec6726ed6925ee6a24ef6c23ef6e21f06f20f1711ff1731df2741cf3761bf37819f47918f57b17f57d15f67e14f68013f78212f78410f8850ff8870ef8890cf98b0bf98c0af98e09fa9008fa9207fa9407fb9606fb9706fb9906fb9b06fb9d07fc9f07fca108fca309fca50afca60cfca80dfcaa0ffcac11fcae12fcb014fcb216fcb418fbb61afbb81dfbba1ffbbc21fbbe23fac026fac228fac42afac62df9c72ff9c932f9cb35f8cd37f8cf3af7d13df7d340f6d543f6d746f5d949f5db4cf4dd4ff4df53f4e156f3e35af3e55df2e661f2e865f2ea69f1ec6df1ed71f1ef75f1f179f2f27df2f482f3f586f3f68af4f88ef5f992f6fa96f8fb9af9fc9dfafda1fcffa4\"));\n\nvar plasma = ramp$1(colors(\"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\"));\n\nfunction constant$b(x) {\n  return function constant() {\n    return x;\n  };\n}\n\nvar abs$1 = Math.abs;\nvar atan2$1 = Math.atan2;\nvar cos$2 = Math.cos;\nvar max$2 = Math.max;\nvar min$1 = Math.min;\nvar sin$2 = Math.sin;\nvar sqrt$2 = Math.sqrt;\n\nvar epsilon$3 = 1e-12;\nvar pi$4 = Math.PI;\nvar halfPi$3 = pi$4 / 2;\nvar tau$4 = 2 * pi$4;\n\nfunction acos$1(x) {\n  return x > 1 ? 0 : x < -1 ? pi$4 : Math.acos(x);\n}\n\nfunction asin$1(x) {\n  return x >= 1 ? halfPi$3 : x <= -1 ? -halfPi$3 : Math.asin(x);\n}\n\nfunction arcInnerRadius(d) {\n  return d.innerRadius;\n}\n\nfunction arcOuterRadius(d) {\n  return d.outerRadius;\n}\n\nfunction arcStartAngle(d) {\n  return d.startAngle;\n}\n\nfunction arcEndAngle(d) {\n  return d.endAngle;\n}\n\nfunction arcPadAngle(d) {\n  return d && d.padAngle; // Note: optional!\n}\n\nfunction intersect(x0, y0, x1, y1, x2, y2, x3, y3) {\n  var x10 = x1 - x0, y10 = y1 - y0,\n      x32 = x3 - x2, y32 = y3 - y2,\n      t = y32 * x10 - x32 * y10;\n  if (t * t < epsilon$3) return;\n  t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / t;\n  return [x0 + t * x10, y0 + t * y10];\n}\n\n// Compute perpendicular offset line of length rc.\n// http://mathworld.wolfram.com/Circle-LineIntersection.html\nfunction cornerTangents(x0, y0, x1, y1, r1, rc, cw) {\n  var x01 = x0 - x1,\n      y01 = y0 - y1,\n      lo = (cw ? rc : -rc) / sqrt$2(x01 * x01 + y01 * y01),\n      ox = lo * y01,\n      oy = -lo * x01,\n      x11 = x0 + ox,\n      y11 = y0 + oy,\n      x10 = x1 + ox,\n      y10 = y1 + oy,\n      x00 = (x11 + x10) / 2,\n      y00 = (y11 + y10) / 2,\n      dx = x10 - x11,\n      dy = y10 - y11,\n      d2 = dx * dx + dy * dy,\n      r = r1 - rc,\n      D = x11 * y10 - x10 * y11,\n      d = (dy < 0 ? -1 : 1) * sqrt$2(max$2(0, r * r * d2 - D * D)),\n      cx0 = (D * dy - dx * d) / d2,\n      cy0 = (-D * dx - dy * d) / d2,\n      cx1 = (D * dy + dx * d) / d2,\n      cy1 = (-D * dx + dy * d) / d2,\n      dx0 = cx0 - x00,\n      dy0 = cy0 - y00,\n      dx1 = cx1 - x00,\n      dy1 = cy1 - y00;\n\n  // Pick the closer of the two intersection points.\n  // TODO Is there a faster way to determine which intersection to use?\n  if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;\n\n  return {\n    cx: cx0,\n    cy: cy0,\n    x01: -ox,\n    y01: -oy,\n    x11: cx0 * (r1 / r - 1),\n    y11: cy0 * (r1 / r - 1)\n  };\n}\n\nfunction arc() {\n  var innerRadius = arcInnerRadius,\n      outerRadius = arcOuterRadius,\n      cornerRadius = constant$b(0),\n      padRadius = null,\n      startAngle = arcStartAngle,\n      endAngle = arcEndAngle,\n      padAngle = arcPadAngle,\n      context = null;\n\n  function arc() {\n    var buffer,\n        r,\n        r0 = +innerRadius.apply(this, arguments),\n        r1 = +outerRadius.apply(this, arguments),\n        a0 = startAngle.apply(this, arguments) - halfPi$3,\n        a1 = endAngle.apply(this, arguments) - halfPi$3,\n        da = abs$1(a1 - a0),\n        cw = a1 > a0;\n\n    if (!context) context = buffer = path();\n\n    // Ensure that the outer radius is always larger than the inner radius.\n    if (r1 < r0) r = r1, r1 = r0, r0 = r;\n\n    // Is it a point?\n    if (!(r1 > epsilon$3)) context.moveTo(0, 0);\n\n    // Or is it a circle or annulus?\n    else if (da > tau$4 - epsilon$3) {\n      context.moveTo(r1 * cos$2(a0), r1 * sin$2(a0));\n      context.arc(0, 0, r1, a0, a1, !cw);\n      if (r0 > epsilon$3) {\n        context.moveTo(r0 * cos$2(a1), r0 * sin$2(a1));\n        context.arc(0, 0, r0, a1, a0, cw);\n      }\n    }\n\n    // Or is it a circular or annular sector?\n    else {\n      var a01 = a0,\n          a11 = a1,\n          a00 = a0,\n          a10 = a1,\n          da0 = da,\n          da1 = da,\n          ap = padAngle.apply(this, arguments) / 2,\n          rp = (ap > epsilon$3) && (padRadius ? +padRadius.apply(this, arguments) : sqrt$2(r0 * r0 + r1 * r1)),\n          rc = min$1(abs$1(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),\n          rc0 = rc,\n          rc1 = rc,\n          t0,\n          t1;\n\n      // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.\n      if (rp > epsilon$3) {\n        var p0 = asin$1(rp / r0 * sin$2(ap)),\n            p1 = asin$1(rp / r1 * sin$2(ap));\n        if ((da0 -= p0 * 2) > epsilon$3) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;\n        else da0 = 0, a00 = a10 = (a0 + a1) / 2;\n        if ((da1 -= p1 * 2) > epsilon$3) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;\n        else da1 = 0, a01 = a11 = (a0 + a1) / 2;\n      }\n\n      var x01 = r1 * cos$2(a01),\n          y01 = r1 * sin$2(a01),\n          x10 = r0 * cos$2(a10),\n          y10 = r0 * sin$2(a10);\n\n      // Apply rounded corners?\n      if (rc > epsilon$3) {\n        var x11 = r1 * cos$2(a11),\n            y11 = r1 * sin$2(a11),\n            x00 = r0 * cos$2(a00),\n            y00 = r0 * sin$2(a00),\n            oc;\n\n        // Restrict the corner radius according to the sector angle.\n        if (da < pi$4 && (oc = intersect(x01, y01, x00, y00, x11, y11, x10, y10))) {\n          var ax = x01 - oc[0],\n              ay = y01 - oc[1],\n              bx = x11 - oc[0],\n              by = y11 - oc[1],\n              kc = 1 / sin$2(acos$1((ax * bx + ay * by) / (sqrt$2(ax * ax + ay * ay) * sqrt$2(bx * bx + by * by))) / 2),\n              lc = sqrt$2(oc[0] * oc[0] + oc[1] * oc[1]);\n          rc0 = min$1(rc, (r0 - lc) / (kc - 1));\n          rc1 = min$1(rc, (r1 - lc) / (kc + 1));\n        }\n      }\n\n      // Is the sector collapsed to a line?\n      if (!(da1 > epsilon$3)) context.moveTo(x01, y01);\n\n      // Does the sector’s outer ring have rounded corners?\n      else if (rc1 > epsilon$3) {\n        t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);\n        t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);\n\n        context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);\n\n        // Have the corners merged?\n        if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, atan2$1(t0.y01, t0.x01), atan2$1(t1.y01, t1.x01), !cw);\n\n        // Otherwise, draw the two corners and the ring.\n        else {\n          context.arc(t0.cx, t0.cy, rc1, atan2$1(t0.y01, t0.x01), atan2$1(t0.y11, t0.x11), !cw);\n          context.arc(0, 0, r1, atan2$1(t0.cy + t0.y11, t0.cx + t0.x11), atan2$1(t1.cy + t1.y11, t1.cx + t1.x11), !cw);\n          context.arc(t1.cx, t1.cy, rc1, atan2$1(t1.y11, t1.x11), atan2$1(t1.y01, t1.x01), !cw);\n        }\n      }\n\n      // Or is the outer ring just a circular arc?\n      else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);\n\n      // Is there no inner ring, and it’s a circular sector?\n      // Or perhaps it’s an annular sector collapsed due to padding?\n      if (!(r0 > epsilon$3) || !(da0 > epsilon$3)) context.lineTo(x10, y10);\n\n      // Does the sector’s inner ring (or point) have rounded corners?\n      else if (rc0 > epsilon$3) {\n        t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);\n        t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);\n\n        context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);\n\n        // Have the corners merged?\n        if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, atan2$1(t0.y01, t0.x01), atan2$1(t1.y01, t1.x01), !cw);\n\n        // Otherwise, draw the two corners and the ring.\n        else {\n          context.arc(t0.cx, t0.cy, rc0, atan2$1(t0.y01, t0.x01), atan2$1(t0.y11, t0.x11), !cw);\n          context.arc(0, 0, r0, atan2$1(t0.cy + t0.y11, t0.cx + t0.x11), atan2$1(t1.cy + t1.y11, t1.cx + t1.x11), cw);\n          context.arc(t1.cx, t1.cy, rc0, atan2$1(t1.y11, t1.x11), atan2$1(t1.y01, t1.x01), !cw);\n        }\n      }\n\n      // Or is the inner ring just a circular arc?\n      else context.arc(0, 0, r0, a10, a00, cw);\n    }\n\n    context.closePath();\n\n    if (buffer) return context = null, buffer + \"\" || null;\n  }\n\n  arc.centroid = function() {\n    var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,\n        a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi$4 / 2;\n    return [cos$2(a) * r, sin$2(a) * r];\n  };\n\n  arc.innerRadius = function(_) {\n    return arguments.length ? (innerRadius = typeof _ === \"function\" ? _ : constant$b(+_), arc) : innerRadius;\n  };\n\n  arc.outerRadius = function(_) {\n    return arguments.length ? (outerRadius = typeof _ === \"function\" ? _ : constant$b(+_), arc) : outerRadius;\n  };\n\n  arc.cornerRadius = function(_) {\n    return arguments.length ? (cornerRadius = typeof _ === \"function\" ? _ : constant$b(+_), arc) : cornerRadius;\n  };\n\n  arc.padRadius = function(_) {\n    return arguments.length ? (padRadius = _ == null ? null : typeof _ === \"function\" ? _ : constant$b(+_), arc) : padRadius;\n  };\n\n  arc.startAngle = function(_) {\n    return arguments.length ? (startAngle = typeof _ === \"function\" ? _ : constant$b(+_), arc) : startAngle;\n  };\n\n  arc.endAngle = function(_) {\n    return arguments.length ? (endAngle = typeof _ === \"function\" ? _ : constant$b(+_), arc) : endAngle;\n  };\n\n  arc.padAngle = function(_) {\n    return arguments.length ? (padAngle = typeof _ === \"function\" ? _ : constant$b(+_), arc) : padAngle;\n  };\n\n  arc.context = function(_) {\n    return arguments.length ? ((context = _ == null ? null : _), arc) : context;\n  };\n\n  return arc;\n}\n\nfunction Linear(context) {\n  this._context = context;\n}\n\nLinear.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; // proceed\n      default: this._context.lineTo(x, y); break;\n    }\n  }\n};\n\nfunction curveLinear(context) {\n  return new Linear(context);\n}\n\nfunction x$3(p) {\n  return p[0];\n}\n\nfunction y$3(p) {\n  return p[1];\n}\n\nfunction line() {\n  var x = x$3,\n      y = y$3,\n      defined = constant$b(true),\n      context = null,\n      curve = curveLinear,\n      output = null;\n\n  function line(data) {\n    var i,\n        n = data.length,\n        d,\n        defined0 = false,\n        buffer;\n\n    if (context == null) output = curve(buffer = path());\n\n    for (i = 0; i <= n; ++i) {\n      if (!(i < n && defined(d = data[i], i, data)) === defined0) {\n        if (defined0 = !defined0) output.lineStart();\n        else output.lineEnd();\n      }\n      if (defined0) output.point(+x(d, i, data), +y(d, i, data));\n    }\n\n    if (buffer) return output = null, buffer + \"\" || null;\n  }\n\n  line.x = function(_) {\n    return arguments.length ? (x = typeof _ === \"function\" ? _ : constant$b(+_), line) : x;\n  };\n\n  line.y = function(_) {\n    return arguments.length ? (y = typeof _ === \"function\" ? _ : constant$b(+_), line) : y;\n  };\n\n  line.defined = function(_) {\n    return arguments.length ? (defined = typeof _ === \"function\" ? _ : constant$b(!!_), line) : defined;\n  };\n\n  line.curve = function(_) {\n    return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;\n  };\n\n  line.context = function(_) {\n    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;\n  };\n\n  return line;\n}\n\nfunction area$3() {\n  var x0 = x$3,\n      x1 = null,\n      y0 = constant$b(0),\n      y1 = y$3,\n      defined = constant$b(true),\n      context = null,\n      curve = curveLinear,\n      output = null;\n\n  function area(data) {\n    var i,\n        j,\n        k,\n        n = data.length,\n        d,\n        defined0 = false,\n        buffer,\n        x0z = new Array(n),\n        y0z = new Array(n);\n\n    if (context == null) output = curve(buffer = path());\n\n    for (i = 0; i <= n; ++i) {\n      if (!(i < n && defined(d = data[i], i, data)) === defined0) {\n        if (defined0 = !defined0) {\n          j = i;\n          output.areaStart();\n          output.lineStart();\n        } else {\n          output.lineEnd();\n          output.lineStart();\n          for (k = i - 1; k >= j; --k) {\n            output.point(x0z[k], y0z[k]);\n          }\n          output.lineEnd();\n          output.areaEnd();\n        }\n      }\n      if (defined0) {\n        x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);\n        output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);\n      }\n    }\n\n    if (buffer) return output = null, buffer + \"\" || null;\n  }\n\n  function arealine() {\n    return line().defined(defined).curve(curve).context(context);\n  }\n\n  area.x = function(_) {\n    return arguments.length ? (x0 = typeof _ === \"function\" ? _ : constant$b(+_), x1 = null, area) : x0;\n  };\n\n  area.x0 = function(_) {\n    return arguments.length ? (x0 = typeof _ === \"function\" ? _ : constant$b(+_), area) : x0;\n  };\n\n  area.x1 = function(_) {\n    return arguments.length ? (x1 = _ == null ? null : typeof _ === \"function\" ? _ : constant$b(+_), area) : x1;\n  };\n\n  area.y = function(_) {\n    return arguments.length ? (y0 = typeof _ === \"function\" ? _ : constant$b(+_), y1 = null, area) : y0;\n  };\n\n  area.y0 = function(_) {\n    return arguments.length ? (y0 = typeof _ === \"function\" ? _ : constant$b(+_), area) : y0;\n  };\n\n  area.y1 = function(_) {\n    return arguments.length ? (y1 = _ == null ? null : typeof _ === \"function\" ? _ : constant$b(+_), area) : y1;\n  };\n\n  area.lineX0 =\n  area.lineY0 = function() {\n    return arealine().x(x0).y(y0);\n  };\n\n  area.lineY1 = function() {\n    return arealine().x(x0).y(y1);\n  };\n\n  area.lineX1 = function() {\n    return arealine().x(x1).y(y0);\n  };\n\n  area.defined = function(_) {\n    return arguments.length ? (defined = typeof _ === \"function\" ? _ : constant$b(!!_), area) : defined;\n  };\n\n  area.curve = function(_) {\n    return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;\n  };\n\n  area.context = function(_) {\n    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;\n  };\n\n  return area;\n}\n\nfunction descending$1(a, b) {\n  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;\n}\n\nfunction identity$8(d) {\n  return d;\n}\n\nfunction pie() {\n  var value = identity$8,\n      sortValues = descending$1,\n      sort = null,\n      startAngle = constant$b(0),\n      endAngle = constant$b(tau$4),\n      padAngle = constant$b(0);\n\n  function pie(data) {\n    var i,\n        n = data.length,\n        j,\n        k,\n        sum = 0,\n        index = new Array(n),\n        arcs = new Array(n),\n        a0 = +startAngle.apply(this, arguments),\n        da = Math.min(tau$4, Math.max(-tau$4, endAngle.apply(this, arguments) - a0)),\n        a1,\n        p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),\n        pa = p * (da < 0 ? -1 : 1),\n        v;\n\n    for (i = 0; i < n; ++i) {\n      if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {\n        sum += v;\n      }\n    }\n\n    // Optionally sort the arcs by previously-computed values or by data.\n    if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); });\n    else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); });\n\n    // Compute the arcs! They are stored in the original data's order.\n    for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {\n      j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {\n        data: data[j],\n        index: i,\n        value: v,\n        startAngle: a0,\n        endAngle: a1,\n        padAngle: p\n      };\n    }\n\n    return arcs;\n  }\n\n  pie.value = function(_) {\n    return arguments.length ? (value = typeof _ === \"function\" ? _ : constant$b(+_), pie) : value;\n  };\n\n  pie.sortValues = function(_) {\n    return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;\n  };\n\n  pie.sort = function(_) {\n    return arguments.length ? (sort = _, sortValues = null, pie) : sort;\n  };\n\n  pie.startAngle = function(_) {\n    return arguments.length ? (startAngle = typeof _ === \"function\" ? _ : constant$b(+_), pie) : startAngle;\n  };\n\n  pie.endAngle = function(_) {\n    return arguments.length ? (endAngle = typeof _ === \"function\" ? _ : constant$b(+_), pie) : endAngle;\n  };\n\n  pie.padAngle = function(_) {\n    return arguments.length ? (padAngle = typeof _ === \"function\" ? _ : constant$b(+_), pie) : padAngle;\n  };\n\n  return pie;\n}\n\nvar curveRadialLinear = curveRadial(curveLinear);\n\nfunction Radial(curve) {\n  this._curve = curve;\n}\n\nRadial.prototype = {\n  areaStart: function() {\n    this._curve.areaStart();\n  },\n  areaEnd: function() {\n    this._curve.areaEnd();\n  },\n  lineStart: function() {\n    this._curve.lineStart();\n  },\n  lineEnd: function() {\n    this._curve.lineEnd();\n  },\n  point: function(a, r) {\n    this._curve.point(r * Math.sin(a), r * -Math.cos(a));\n  }\n};\n\nfunction curveRadial(curve) {\n\n  function radial(context) {\n    return new Radial(curve(context));\n  }\n\n  radial._curve = curve;\n\n  return radial;\n}\n\nfunction lineRadial(l) {\n  var c = l.curve;\n\n  l.angle = l.x, delete l.x;\n  l.radius = l.y, delete l.y;\n\n  l.curve = function(_) {\n    return arguments.length ? c(curveRadial(_)) : c()._curve;\n  };\n\n  return l;\n}\n\nfunction lineRadial$1() {\n  return lineRadial(line().curve(curveRadialLinear));\n}\n\nfunction areaRadial() {\n  var a = area$3().curve(curveRadialLinear),\n      c = a.curve,\n      x0 = a.lineX0,\n      x1 = a.lineX1,\n      y0 = a.lineY0,\n      y1 = a.lineY1;\n\n  a.angle = a.x, delete a.x;\n  a.startAngle = a.x0, delete a.x0;\n  a.endAngle = a.x1, delete a.x1;\n  a.radius = a.y, delete a.y;\n  a.innerRadius = a.y0, delete a.y0;\n  a.outerRadius = a.y1, delete a.y1;\n  a.lineStartAngle = function() { return lineRadial(x0()); }, delete a.lineX0;\n  a.lineEndAngle = function() { return lineRadial(x1()); }, delete a.lineX1;\n  a.lineInnerRadius = function() { return lineRadial(y0()); }, delete a.lineY0;\n  a.lineOuterRadius = function() { return lineRadial(y1()); }, delete a.lineY1;\n\n  a.curve = function(_) {\n    return arguments.length ? c(curveRadial(_)) : c()._curve;\n  };\n\n  return a;\n}\n\nfunction pointRadial(x, y) {\n  return [(y = +y) * Math.cos(x -= Math.PI / 2), y * Math.sin(x)];\n}\n\nvar slice$6 = Array.prototype.slice;\n\nfunction linkSource(d) {\n  return d.source;\n}\n\nfunction linkTarget(d) {\n  return d.target;\n}\n\nfunction link$2(curve) {\n  var source = linkSource,\n      target = linkTarget,\n      x = x$3,\n      y = y$3,\n      context = null;\n\n  function link() {\n    var buffer, argv = slice$6.call(arguments), s = source.apply(this, argv), t = target.apply(this, argv);\n    if (!context) context = buffer = path();\n    curve(context, +x.apply(this, (argv[0] = s, argv)), +y.apply(this, argv), +x.apply(this, (argv[0] = t, argv)), +y.apply(this, argv));\n    if (buffer) return context = null, buffer + \"\" || null;\n  }\n\n  link.source = function(_) {\n    return arguments.length ? (source = _, link) : source;\n  };\n\n  link.target = function(_) {\n    return arguments.length ? (target = _, link) : target;\n  };\n\n  link.x = function(_) {\n    return arguments.length ? (x = typeof _ === \"function\" ? _ : constant$b(+_), link) : x;\n  };\n\n  link.y = function(_) {\n    return arguments.length ? (y = typeof _ === \"function\" ? _ : constant$b(+_), link) : y;\n  };\n\n  link.context = function(_) {\n    return arguments.length ? ((context = _ == null ? null : _), link) : context;\n  };\n\n  return link;\n}\n\nfunction curveHorizontal(context, x0, y0, x1, y1) {\n  context.moveTo(x0, y0);\n  context.bezierCurveTo(x0 = (x0 + x1) / 2, y0, x0, y1, x1, y1);\n}\n\nfunction curveVertical(context, x0, y0, x1, y1) {\n  context.moveTo(x0, y0);\n  context.bezierCurveTo(x0, y0 = (y0 + y1) / 2, x1, y0, x1, y1);\n}\n\nfunction curveRadial$1(context, x0, y0, x1, y1) {\n  var p0 = pointRadial(x0, y0),\n      p1 = pointRadial(x0, y0 = (y0 + y1) / 2),\n      p2 = pointRadial(x1, y0),\n      p3 = pointRadial(x1, y1);\n  context.moveTo(p0[0], p0[1]);\n  context.bezierCurveTo(p1[0], p1[1], p2[0], p2[1], p3[0], p3[1]);\n}\n\nfunction linkHorizontal() {\n  return link$2(curveHorizontal);\n}\n\nfunction linkVertical() {\n  return link$2(curveVertical);\n}\n\nfunction linkRadial() {\n  var l = link$2(curveRadial$1);\n  l.angle = l.x, delete l.x;\n  l.radius = l.y, delete l.y;\n  return l;\n}\n\nvar circle$2 = {\n  draw: function(context, size) {\n    var r = Math.sqrt(size / pi$4);\n    context.moveTo(r, 0);\n    context.arc(0, 0, r, 0, tau$4);\n  }\n};\n\nvar cross$2 = {\n  draw: function(context, size) {\n    var r = Math.sqrt(size / 5) / 2;\n    context.moveTo(-3 * r, -r);\n    context.lineTo(-r, -r);\n    context.lineTo(-r, -3 * r);\n    context.lineTo(r, -3 * r);\n    context.lineTo(r, -r);\n    context.lineTo(3 * r, -r);\n    context.lineTo(3 * r, r);\n    context.lineTo(r, r);\n    context.lineTo(r, 3 * r);\n    context.lineTo(-r, 3 * r);\n    context.lineTo(-r, r);\n    context.lineTo(-3 * r, r);\n    context.closePath();\n  }\n};\n\nvar tan30 = Math.sqrt(1 / 3),\n    tan30_2 = tan30 * 2;\n\nvar diamond = {\n  draw: function(context, size) {\n    var y = Math.sqrt(size / tan30_2),\n        x = y * tan30;\n    context.moveTo(0, -y);\n    context.lineTo(x, 0);\n    context.lineTo(0, y);\n    context.lineTo(-x, 0);\n    context.closePath();\n  }\n};\n\nvar ka = 0.89081309152928522810,\n    kr = Math.sin(pi$4 / 10) / Math.sin(7 * pi$4 / 10),\n    kx = Math.sin(tau$4 / 10) * kr,\n    ky = -Math.cos(tau$4 / 10) * kr;\n\nvar star = {\n  draw: function(context, size) {\n    var r = Math.sqrt(size * ka),\n        x = kx * r,\n        y = ky * r;\n    context.moveTo(0, -r);\n    context.lineTo(x, y);\n    for (var i = 1; i < 5; ++i) {\n      var a = tau$4 * i / 5,\n          c = Math.cos(a),\n          s = Math.sin(a);\n      context.lineTo(s * r, -c * r);\n      context.lineTo(c * x - s * y, s * x + c * y);\n    }\n    context.closePath();\n  }\n};\n\nvar square = {\n  draw: function(context, size) {\n    var w = Math.sqrt(size),\n        x = -w / 2;\n    context.rect(x, x, w, w);\n  }\n};\n\nvar sqrt3 = Math.sqrt(3);\n\nvar triangle = {\n  draw: function(context, size) {\n    var y = -Math.sqrt(size / (sqrt3 * 3));\n    context.moveTo(0, y * 2);\n    context.lineTo(-sqrt3 * y, -y);\n    context.lineTo(sqrt3 * y, -y);\n    context.closePath();\n  }\n};\n\nvar c$2 = -0.5,\n    s = Math.sqrt(3) / 2,\n    k = 1 / Math.sqrt(12),\n    a = (k / 2 + 1) * 3;\n\nvar wye = {\n  draw: function(context, size) {\n    var r = Math.sqrt(size / a),\n        x0 = r / 2,\n        y0 = r * k,\n        x1 = x0,\n        y1 = r * k + r,\n        x2 = -x1,\n        y2 = y1;\n    context.moveTo(x0, y0);\n    context.lineTo(x1, y1);\n    context.lineTo(x2, y2);\n    context.lineTo(c$2 * x0 - s * y0, s * x0 + c$2 * y0);\n    context.lineTo(c$2 * x1 - s * y1, s * x1 + c$2 * y1);\n    context.lineTo(c$2 * x2 - s * y2, s * x2 + c$2 * y2);\n    context.lineTo(c$2 * x0 + s * y0, c$2 * y0 - s * x0);\n    context.lineTo(c$2 * x1 + s * y1, c$2 * y1 - s * x1);\n    context.lineTo(c$2 * x2 + s * y2, c$2 * y2 - s * x2);\n    context.closePath();\n  }\n};\n\nvar symbols = [\n  circle$2,\n  cross$2,\n  diamond,\n  square,\n  star,\n  triangle,\n  wye\n];\n\nfunction symbol() {\n  var type = constant$b(circle$2),\n      size = constant$b(64),\n      context = null;\n\n  function symbol() {\n    var buffer;\n    if (!context) context = buffer = path();\n    type.apply(this, arguments).draw(context, +size.apply(this, arguments));\n    if (buffer) return context = null, buffer + \"\" || null;\n  }\n\n  symbol.type = function(_) {\n    return arguments.length ? (type = typeof _ === \"function\" ? _ : constant$b(_), symbol) : type;\n  };\n\n  symbol.size = function(_) {\n    return arguments.length ? (size = typeof _ === \"function\" ? _ : constant$b(+_), symbol) : size;\n  };\n\n  symbol.context = function(_) {\n    return arguments.length ? (context = _ == null ? null : _, symbol) : context;\n  };\n\n  return symbol;\n}\n\nfunction noop$3() {}\n\nfunction point$2(that, x, y) {\n  that._context.bezierCurveTo(\n    (2 * that._x0 + that._x1) / 3,\n    (2 * that._y0 + that._y1) / 3,\n    (that._x0 + 2 * that._x1) / 3,\n    (that._y0 + 2 * that._y1) / 3,\n    (that._x0 + 4 * that._x1 + x) / 6,\n    (that._y0 + 4 * that._y1 + y) / 6\n  );\n}\n\nfunction Basis(context) {\n  this._context = context;\n}\n\nBasis.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 =\n    this._y0 = this._y1 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 3: point$2(this, this._x1, this._y1); // proceed\n      case 2: this._context.lineTo(this._x1, this._y1); break;\n    }\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed\n      default: point$2(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = x;\n    this._y0 = this._y1, this._y1 = y;\n  }\n};\n\nfunction basis$2(context) {\n  return new Basis(context);\n}\n\nfunction BasisClosed(context) {\n  this._context = context;\n}\n\nBasisClosed.prototype = {\n  areaStart: noop$3,\n  areaEnd: noop$3,\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =\n    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 1: {\n        this._context.moveTo(this._x2, this._y2);\n        this._context.closePath();\n        break;\n      }\n      case 2: {\n        this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);\n        this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);\n        this._context.closePath();\n        break;\n      }\n      case 3: {\n        this.point(this._x2, this._y2);\n        this.point(this._x3, this._y3);\n        this.point(this._x4, this._y4);\n        break;\n      }\n    }\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._x2 = x, this._y2 = y; break;\n      case 1: this._point = 2; this._x3 = x, this._y3 = y; break;\n      case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break;\n      default: point$2(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = x;\n    this._y0 = this._y1, this._y1 = y;\n  }\n};\n\nfunction basisClosed$1(context) {\n  return new BasisClosed(context);\n}\n\nfunction BasisOpen(context) {\n  this._context = context;\n}\n\nBasisOpen.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 =\n    this._y0 = this._y1 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break;\n      case 3: this._point = 4; // proceed\n      default: point$2(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = x;\n    this._y0 = this._y1, this._y1 = y;\n  }\n};\n\nfunction basisOpen(context) {\n  return new BasisOpen(context);\n}\n\nfunction Bundle(context, beta) {\n  this._basis = new Basis(context);\n  this._beta = beta;\n}\n\nBundle.prototype = {\n  lineStart: function() {\n    this._x = [];\n    this._y = [];\n    this._basis.lineStart();\n  },\n  lineEnd: function() {\n    var x = this._x,\n        y = this._y,\n        j = x.length - 1;\n\n    if (j > 0) {\n      var x0 = x[0],\n          y0 = y[0],\n          dx = x[j] - x0,\n          dy = y[j] - y0,\n          i = -1,\n          t;\n\n      while (++i <= j) {\n        t = i / j;\n        this._basis.point(\n          this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),\n          this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)\n        );\n      }\n    }\n\n    this._x = this._y = null;\n    this._basis.lineEnd();\n  },\n  point: function(x, y) {\n    this._x.push(+x);\n    this._y.push(+y);\n  }\n};\n\nvar bundle = (function custom(beta) {\n\n  function bundle(context) {\n    return beta === 1 ? new Basis(context) : new Bundle(context, beta);\n  }\n\n  bundle.beta = function(beta) {\n    return custom(+beta);\n  };\n\n  return bundle;\n})(0.85);\n\nfunction point$3(that, x, y) {\n  that._context.bezierCurveTo(\n    that._x1 + that._k * (that._x2 - that._x0),\n    that._y1 + that._k * (that._y2 - that._y0),\n    that._x2 + that._k * (that._x1 - x),\n    that._y2 + that._k * (that._y1 - y),\n    that._x2,\n    that._y2\n  );\n}\n\nfunction Cardinal(context, tension) {\n  this._context = context;\n  this._k = (1 - tension) / 6;\n}\n\nCardinal.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 =\n    this._y0 = this._y1 = this._y2 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 2: this._context.lineTo(this._x2, this._y2); break;\n      case 3: point$3(this, this._x1, this._y1); break;\n    }\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; this._x1 = x, this._y1 = y; break;\n      case 2: this._point = 3; // proceed\n      default: point$3(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar cardinal = (function custom(tension) {\n\n  function cardinal(context) {\n    return new Cardinal(context, tension);\n  }\n\n  cardinal.tension = function(tension) {\n    return custom(+tension);\n  };\n\n  return cardinal;\n})(0);\n\nfunction CardinalClosed(context, tension) {\n  this._context = context;\n  this._k = (1 - tension) / 6;\n}\n\nCardinalClosed.prototype = {\n  areaStart: noop$3,\n  areaEnd: noop$3,\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =\n    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 1: {\n        this._context.moveTo(this._x3, this._y3);\n        this._context.closePath();\n        break;\n      }\n      case 2: {\n        this._context.lineTo(this._x3, this._y3);\n        this._context.closePath();\n        break;\n      }\n      case 3: {\n        this.point(this._x3, this._y3);\n        this.point(this._x4, this._y4);\n        this.point(this._x5, this._y5);\n        break;\n      }\n    }\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;\n      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;\n      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;\n      default: point$3(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar cardinalClosed = (function custom(tension) {\n\n  function cardinal(context) {\n    return new CardinalClosed(context, tension);\n  }\n\n  cardinal.tension = function(tension) {\n    return custom(+tension);\n  };\n\n  return cardinal;\n})(0);\n\nfunction CardinalOpen(context, tension) {\n  this._context = context;\n  this._k = (1 - tension) / 6;\n}\n\nCardinalOpen.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 =\n    this._y0 = this._y1 = this._y2 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;\n      case 3: this._point = 4; // proceed\n      default: point$3(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar cardinalOpen = (function custom(tension) {\n\n  function cardinal(context) {\n    return new CardinalOpen(context, tension);\n  }\n\n  cardinal.tension = function(tension) {\n    return custom(+tension);\n  };\n\n  return cardinal;\n})(0);\n\nfunction point$4(that, x, y) {\n  var x1 = that._x1,\n      y1 = that._y1,\n      x2 = that._x2,\n      y2 = that._y2;\n\n  if (that._l01_a > epsilon$3) {\n    var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,\n        n = 3 * that._l01_a * (that._l01_a + that._l12_a);\n    x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;\n    y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;\n  }\n\n  if (that._l23_a > epsilon$3) {\n    var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,\n        m = 3 * that._l23_a * (that._l23_a + that._l12_a);\n    x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;\n    y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;\n  }\n\n  that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);\n}\n\nfunction CatmullRom(context, alpha) {\n  this._context = context;\n  this._alpha = alpha;\n}\n\nCatmullRom.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 =\n    this._y0 = this._y1 = this._y2 = NaN;\n    this._l01_a = this._l12_a = this._l23_a =\n    this._l01_2a = this._l12_2a = this._l23_2a =\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 2: this._context.lineTo(this._x2, this._y2); break;\n      case 3: this.point(this._x2, this._y2); break;\n    }\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n\n    if (this._point) {\n      var x23 = this._x2 - x,\n          y23 = this._y2 - y;\n      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));\n    }\n\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; // proceed\n      default: point$4(this, x, y); break;\n    }\n\n    this._l01_a = this._l12_a, this._l12_a = this._l23_a;\n    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar catmullRom = (function custom(alpha) {\n\n  function catmullRom(context) {\n    return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0);\n  }\n\n  catmullRom.alpha = function(alpha) {\n    return custom(+alpha);\n  };\n\n  return catmullRom;\n})(0.5);\n\nfunction CatmullRomClosed(context, alpha) {\n  this._context = context;\n  this._alpha = alpha;\n}\n\nCatmullRomClosed.prototype = {\n  areaStart: noop$3,\n  areaEnd: noop$3,\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =\n    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;\n    this._l01_a = this._l12_a = this._l23_a =\n    this._l01_2a = this._l12_2a = this._l23_2a =\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 1: {\n        this._context.moveTo(this._x3, this._y3);\n        this._context.closePath();\n        break;\n      }\n      case 2: {\n        this._context.lineTo(this._x3, this._y3);\n        this._context.closePath();\n        break;\n      }\n      case 3: {\n        this.point(this._x3, this._y3);\n        this.point(this._x4, this._y4);\n        this.point(this._x5, this._y5);\n        break;\n      }\n    }\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n\n    if (this._point) {\n      var x23 = this._x2 - x,\n          y23 = this._y2 - y;\n      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));\n    }\n\n    switch (this._point) {\n      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;\n      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;\n      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;\n      default: point$4(this, x, y); break;\n    }\n\n    this._l01_a = this._l12_a, this._l12_a = this._l23_a;\n    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar catmullRomClosed = (function custom(alpha) {\n\n  function catmullRom(context) {\n    return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);\n  }\n\n  catmullRom.alpha = function(alpha) {\n    return custom(+alpha);\n  };\n\n  return catmullRom;\n})(0.5);\n\nfunction CatmullRomOpen(context, alpha) {\n  this._context = context;\n  this._alpha = alpha;\n}\n\nCatmullRomOpen.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 =\n    this._y0 = this._y1 = this._y2 = NaN;\n    this._l01_a = this._l12_a = this._l23_a =\n    this._l01_2a = this._l12_2a = this._l23_2a =\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n\n    if (this._point) {\n      var x23 = this._x2 - x,\n          y23 = this._y2 - y;\n      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));\n    }\n\n    switch (this._point) {\n      case 0: this._point = 1; break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;\n      case 3: this._point = 4; // proceed\n      default: point$4(this, x, y); break;\n    }\n\n    this._l01_a = this._l12_a, this._l12_a = this._l23_a;\n    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar catmullRomOpen = (function custom(alpha) {\n\n  function catmullRom(context) {\n    return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);\n  }\n\n  catmullRom.alpha = function(alpha) {\n    return custom(+alpha);\n  };\n\n  return catmullRom;\n})(0.5);\n\nfunction LinearClosed(context) {\n  this._context = context;\n}\n\nLinearClosed.prototype = {\n  areaStart: noop$3,\n  areaEnd: noop$3,\n  lineStart: function() {\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._point) this._context.closePath();\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    if (this._point) this._context.lineTo(x, y);\n    else this._point = 1, this._context.moveTo(x, y);\n  }\n};\n\nfunction linearClosed(context) {\n  return new LinearClosed(context);\n}\n\nfunction sign$1(x) {\n  return x < 0 ? -1 : 1;\n}\n\n// Calculate the slopes of the tangents (Hermite-type interpolation) based on\n// the following paper: Steffen, M. 1990. A Simple Method for Monotonic\n// Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO.\n// NOV(II), P. 443, 1990.\nfunction slope3(that, x2, y2) {\n  var h0 = that._x1 - that._x0,\n      h1 = x2 - that._x1,\n      s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),\n      s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),\n      p = (s0 * h1 + s1 * h0) / (h0 + h1);\n  return (sign$1(s0) + sign$1(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;\n}\n\n// Calculate a one-sided slope.\nfunction slope2(that, t) {\n  var h = that._x1 - that._x0;\n  return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;\n}\n\n// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations\n// \"you can express cubic Hermite interpolation in terms of cubic Bézier curves\n// with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1\".\nfunction point$5(that, t0, t1) {\n  var x0 = that._x0,\n      y0 = that._y0,\n      x1 = that._x1,\n      y1 = that._y1,\n      dx = (x1 - x0) / 3;\n  that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);\n}\n\nfunction MonotoneX(context) {\n  this._context = context;\n}\n\nMonotoneX.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 =\n    this._y0 = this._y1 =\n    this._t0 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 2: this._context.lineTo(this._x1, this._y1); break;\n      case 3: point$5(this, this._t0, slope2(this, this._t0)); break;\n    }\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    var t1 = NaN;\n\n    x = +x, y = +y;\n    if (x === this._x1 && y === this._y1) return; // Ignore coincident points.\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; point$5(this, slope2(this, t1 = slope3(this, x, y)), t1); break;\n      default: point$5(this, this._t0, t1 = slope3(this, x, y)); break;\n    }\n\n    this._x0 = this._x1, this._x1 = x;\n    this._y0 = this._y1, this._y1 = y;\n    this._t0 = t1;\n  }\n};\n\nfunction MonotoneY(context) {\n  this._context = new ReflectContext(context);\n}\n\n(MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) {\n  MonotoneX.prototype.point.call(this, y, x);\n};\n\nfunction ReflectContext(context) {\n  this._context = context;\n}\n\nReflectContext.prototype = {\n  moveTo: function(x, y) { this._context.moveTo(y, x); },\n  closePath: function() { this._context.closePath(); },\n  lineTo: function(x, y) { this._context.lineTo(y, x); },\n  bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); }\n};\n\nfunction monotoneX(context) {\n  return new MonotoneX(context);\n}\n\nfunction monotoneY(context) {\n  return new MonotoneY(context);\n}\n\nfunction Natural(context) {\n  this._context = context;\n}\n\nNatural.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x = [];\n    this._y = [];\n  },\n  lineEnd: function() {\n    var x = this._x,\n        y = this._y,\n        n = x.length;\n\n    if (n) {\n      this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);\n      if (n === 2) {\n        this._context.lineTo(x[1], y[1]);\n      } else {\n        var px = controlPoints(x),\n            py = controlPoints(y);\n        for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {\n          this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);\n        }\n      }\n    }\n\n    if (this._line || (this._line !== 0 && n === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n    this._x = this._y = null;\n  },\n  point: function(x, y) {\n    this._x.push(+x);\n    this._y.push(+y);\n  }\n};\n\n// See https://www.particleincell.com/2012/bezier-splines/ for derivation.\nfunction controlPoints(x) {\n  var i,\n      n = x.length - 1,\n      m,\n      a = new Array(n),\n      b = new Array(n),\n      r = new Array(n);\n  a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];\n  for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];\n  a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];\n  for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];\n  a[n - 1] = r[n - 1] / b[n - 1];\n  for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];\n  b[n - 1] = (x[n] + a[n - 1]) / 2;\n  for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];\n  return [a, b];\n}\n\nfunction natural(context) {\n  return new Natural(context);\n}\n\nfunction Step(context, t) {\n  this._context = context;\n  this._t = t;\n}\n\nStep.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x = this._y = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; // proceed\n      default: {\n        if (this._t <= 0) {\n          this._context.lineTo(this._x, y);\n          this._context.lineTo(x, y);\n        } else {\n          var x1 = this._x * (1 - this._t) + x * this._t;\n          this._context.lineTo(x1, this._y);\n          this._context.lineTo(x1, y);\n        }\n        break;\n      }\n    }\n    this._x = x, this._y = y;\n  }\n};\n\nfunction step(context) {\n  return new Step(context, 0.5);\n}\n\nfunction stepBefore(context) {\n  return new Step(context, 0);\n}\n\nfunction stepAfter(context) {\n  return new Step(context, 1);\n}\n\nfunction none$1(series, order) {\n  if (!((n = series.length) > 1)) return;\n  for (var i = 1, j, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {\n    s0 = s1, s1 = series[order[i]];\n    for (j = 0; j < m; ++j) {\n      s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];\n    }\n  }\n}\n\nfunction none$2(series) {\n  var n = series.length, o = new Array(n);\n  while (--n >= 0) o[n] = n;\n  return o;\n}\n\nfunction stackValue(d, key) {\n  return d[key];\n}\n\nfunction stack() {\n  var keys = constant$b([]),\n      order = none$2,\n      offset = none$1,\n      value = stackValue;\n\n  function stack(data) {\n    var kz = keys.apply(this, arguments),\n        i,\n        m = data.length,\n        n = kz.length,\n        sz = new Array(n),\n        oz;\n\n    for (i = 0; i < n; ++i) {\n      for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) {\n        si[j] = sij = [0, +value(data[j], ki, j, data)];\n        sij.data = data[j];\n      }\n      si.key = ki;\n    }\n\n    for (i = 0, oz = order(sz); i < n; ++i) {\n      sz[oz[i]].index = i;\n    }\n\n    offset(sz, oz);\n    return sz;\n  }\n\n  stack.keys = function(_) {\n    return arguments.length ? (keys = typeof _ === \"function\" ? _ : constant$b(slice$6.call(_)), stack) : keys;\n  };\n\n  stack.value = function(_) {\n    return arguments.length ? (value = typeof _ === \"function\" ? _ : constant$b(+_), stack) : value;\n  };\n\n  stack.order = function(_) {\n    return arguments.length ? (order = _ == null ? none$2 : typeof _ === \"function\" ? _ : constant$b(slice$6.call(_)), stack) : order;\n  };\n\n  stack.offset = function(_) {\n    return arguments.length ? (offset = _ == null ? none$1 : _, stack) : offset;\n  };\n\n  return stack;\n}\n\nfunction expand(series, order) {\n  if (!((n = series.length) > 0)) return;\n  for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {\n    for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;\n    if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y;\n  }\n  none$1(series, order);\n}\n\nfunction diverging$1(series, order) {\n  if (!((n = series.length) > 0)) return;\n  for (var i, j = 0, d, dy, yp, yn, n, m = series[order[0]].length; j < m; ++j) {\n    for (yp = yn = 0, i = 0; i < n; ++i) {\n      if ((dy = (d = series[order[i]][j])[1] - d[0]) > 0) {\n        d[0] = yp, d[1] = yp += dy;\n      } else if (dy < 0) {\n        d[1] = yn, d[0] = yn += dy;\n      } else {\n        d[0] = 0, d[1] = dy;\n      }\n    }\n  }\n}\n\nfunction silhouette(series, order) {\n  if (!((n = series.length) > 0)) return;\n  for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {\n    for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;\n    s0[j][1] += s0[j][0] = -y / 2;\n  }\n  none$1(series, order);\n}\n\nfunction wiggle(series, order) {\n  if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;\n  for (var y = 0, j = 1, s0, m, n; j < m; ++j) {\n    for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {\n      var si = series[order[i]],\n          sij0 = si[j][1] || 0,\n          sij1 = si[j - 1][1] || 0,\n          s3 = (sij0 - sij1) / 2;\n      for (var k = 0; k < i; ++k) {\n        var sk = series[order[k]],\n            skj0 = sk[j][1] || 0,\n            skj1 = sk[j - 1][1] || 0;\n        s3 += skj0 - skj1;\n      }\n      s1 += sij0, s2 += s3 * sij0;\n    }\n    s0[j - 1][1] += s0[j - 1][0] = y;\n    if (s1) y -= s2 / s1;\n  }\n  s0[j - 1][1] += s0[j - 1][0] = y;\n  none$1(series, order);\n}\n\nfunction appearance(series) {\n  var peaks = series.map(peak);\n  return none$2(series).sort(function(a, b) { return peaks[a] - peaks[b]; });\n}\n\nfunction peak(series) {\n  var i = -1, j = 0, n = series.length, vi, vj = -Infinity;\n  while (++i < n) if ((vi = +series[i][1]) > vj) vj = vi, j = i;\n  return j;\n}\n\nfunction ascending$3(series) {\n  var sums = series.map(sum$2);\n  return none$2(series).sort(function(a, b) { return sums[a] - sums[b]; });\n}\n\nfunction sum$2(series) {\n  var s = 0, i = -1, n = series.length, v;\n  while (++i < n) if (v = +series[i][1]) s += v;\n  return s;\n}\n\nfunction descending$2(series) {\n  return ascending$3(series).reverse();\n}\n\nfunction insideOut(series) {\n  var n = series.length,\n      i,\n      j,\n      sums = series.map(sum$2),\n      order = appearance(series),\n      top = 0,\n      bottom = 0,\n      tops = [],\n      bottoms = [];\n\n  for (i = 0; i < n; ++i) {\n    j = order[i];\n    if (top < bottom) {\n      top += sums[j];\n      tops.push(j);\n    } else {\n      bottom += sums[j];\n      bottoms.push(j);\n    }\n  }\n\n  return bottoms.reverse().concat(tops);\n}\n\nfunction reverse(series) {\n  return none$2(series).reverse();\n}\n\nfunction constant$c(x) {\n  return function() {\n    return x;\n  };\n}\n\nfunction x$4(d) {\n  return d[0];\n}\n\nfunction y$4(d) {\n  return d[1];\n}\n\nfunction RedBlackTree() {\n  this._ = null; // root node\n}\n\nfunction RedBlackNode(node) {\n  node.U = // parent node\n  node.C = // color - true for red, false for black\n  node.L = // left node\n  node.R = // right node\n  node.P = // previous node\n  node.N = null; // next node\n}\n\nRedBlackTree.prototype = {\n  constructor: RedBlackTree,\n\n  insert: function(after, node) {\n    var parent, grandpa, uncle;\n\n    if (after) {\n      node.P = after;\n      node.N = after.N;\n      if (after.N) after.N.P = node;\n      after.N = node;\n      if (after.R) {\n        after = after.R;\n        while (after.L) after = after.L;\n        after.L = node;\n      } else {\n        after.R = node;\n      }\n      parent = after;\n    } else if (this._) {\n      after = RedBlackFirst(this._);\n      node.P = null;\n      node.N = after;\n      after.P = after.L = node;\n      parent = after;\n    } else {\n      node.P = node.N = null;\n      this._ = node;\n      parent = null;\n    }\n    node.L = node.R = null;\n    node.U = parent;\n    node.C = true;\n\n    after = node;\n    while (parent && parent.C) {\n      grandpa = parent.U;\n      if (parent === grandpa.L) {\n        uncle = grandpa.R;\n        if (uncle && uncle.C) {\n          parent.C = uncle.C = false;\n          grandpa.C = true;\n          after = grandpa;\n        } else {\n          if (after === parent.R) {\n            RedBlackRotateLeft(this, parent);\n            after = parent;\n            parent = after.U;\n          }\n          parent.C = false;\n          grandpa.C = true;\n          RedBlackRotateRight(this, grandpa);\n        }\n      } else {\n        uncle = grandpa.L;\n        if (uncle && uncle.C) {\n          parent.C = uncle.C = false;\n          grandpa.C = true;\n          after = grandpa;\n        } else {\n          if (after === parent.L) {\n            RedBlackRotateRight(this, parent);\n            after = parent;\n            parent = after.U;\n          }\n          parent.C = false;\n          grandpa.C = true;\n          RedBlackRotateLeft(this, grandpa);\n        }\n      }\n      parent = after.U;\n    }\n    this._.C = false;\n  },\n\n  remove: function(node) {\n    if (node.N) node.N.P = node.P;\n    if (node.P) node.P.N = node.N;\n    node.N = node.P = null;\n\n    var parent = node.U,\n        sibling,\n        left = node.L,\n        right = node.R,\n        next,\n        red;\n\n    if (!left) next = right;\n    else if (!right) next = left;\n    else next = RedBlackFirst(right);\n\n    if (parent) {\n      if (parent.L === node) parent.L = next;\n      else parent.R = next;\n    } else {\n      this._ = next;\n    }\n\n    if (left && right) {\n      red = next.C;\n      next.C = node.C;\n      next.L = left;\n      left.U = next;\n      if (next !== right) {\n        parent = next.U;\n        next.U = node.U;\n        node = next.R;\n        parent.L = node;\n        next.R = right;\n        right.U = next;\n      } else {\n        next.U = parent;\n        parent = next;\n        node = next.R;\n      }\n    } else {\n      red = node.C;\n      node = next;\n    }\n\n    if (node) node.U = parent;\n    if (red) return;\n    if (node && node.C) { node.C = false; return; }\n\n    do {\n      if (node === this._) break;\n      if (node === parent.L) {\n        sibling = parent.R;\n        if (sibling.C) {\n          sibling.C = false;\n          parent.C = true;\n          RedBlackRotateLeft(this, parent);\n          sibling = parent.R;\n        }\n        if ((sibling.L && sibling.L.C)\n            || (sibling.R && sibling.R.C)) {\n          if (!sibling.R || !sibling.R.C) {\n            sibling.L.C = false;\n            sibling.C = true;\n            RedBlackRotateRight(this, sibling);\n            sibling = parent.R;\n          }\n          sibling.C = parent.C;\n          parent.C = sibling.R.C = false;\n          RedBlackRotateLeft(this, parent);\n          node = this._;\n          break;\n        }\n      } else {\n        sibling = parent.L;\n        if (sibling.C) {\n          sibling.C = false;\n          parent.C = true;\n          RedBlackRotateRight(this, parent);\n          sibling = parent.L;\n        }\n        if ((sibling.L && sibling.L.C)\n          || (sibling.R && sibling.R.C)) {\n          if (!sibling.L || !sibling.L.C) {\n            sibling.R.C = false;\n            sibling.C = true;\n            RedBlackRotateLeft(this, sibling);\n            sibling = parent.L;\n          }\n          sibling.C = parent.C;\n          parent.C = sibling.L.C = false;\n          RedBlackRotateRight(this, parent);\n          node = this._;\n          break;\n        }\n      }\n      sibling.C = true;\n      node = parent;\n      parent = parent.U;\n    } while (!node.C);\n\n    if (node) node.C = false;\n  }\n};\n\nfunction RedBlackRotateLeft(tree, node) {\n  var p = node,\n      q = node.R,\n      parent = p.U;\n\n  if (parent) {\n    if (parent.L === p) parent.L = q;\n    else parent.R = q;\n  } else {\n    tree._ = q;\n  }\n\n  q.U = parent;\n  p.U = q;\n  p.R = q.L;\n  if (p.R) p.R.U = p;\n  q.L = p;\n}\n\nfunction RedBlackRotateRight(tree, node) {\n  var p = node,\n      q = node.L,\n      parent = p.U;\n\n  if (parent) {\n    if (parent.L === p) parent.L = q;\n    else parent.R = q;\n  } else {\n    tree._ = q;\n  }\n\n  q.U = parent;\n  p.U = q;\n  p.L = q.R;\n  if (p.L) p.L.U = p;\n  q.R = p;\n}\n\nfunction RedBlackFirst(node) {\n  while (node.L) node = node.L;\n  return node;\n}\n\nfunction createEdge(left, right, v0, v1) {\n  var edge = [null, null],\n      index = edges.push(edge) - 1;\n  edge.left = left;\n  edge.right = right;\n  if (v0) setEdgeEnd(edge, left, right, v0);\n  if (v1) setEdgeEnd(edge, right, left, v1);\n  cells[left.index].halfedges.push(index);\n  cells[right.index].halfedges.push(index);\n  return edge;\n}\n\nfunction createBorderEdge(left, v0, v1) {\n  var edge = [v0, v1];\n  edge.left = left;\n  return edge;\n}\n\nfunction setEdgeEnd(edge, left, right, vertex) {\n  if (!edge[0] && !edge[1]) {\n    edge[0] = vertex;\n    edge.left = left;\n    edge.right = right;\n  } else if (edge.left === right) {\n    edge[1] = vertex;\n  } else {\n    edge[0] = vertex;\n  }\n}\n\n// Liang–Barsky line clipping.\nfunction clipEdge(edge, x0, y0, x1, y1) {\n  var a = edge[0],\n      b = edge[1],\n      ax = a[0],\n      ay = a[1],\n      bx = b[0],\n      by = b[1],\n      t0 = 0,\n      t1 = 1,\n      dx = bx - ax,\n      dy = by - ay,\n      r;\n\n  r = x0 - ax;\n  if (!dx && r > 0) return;\n  r /= dx;\n  if (dx < 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  } else if (dx > 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  }\n\n  r = x1 - ax;\n  if (!dx && r < 0) return;\n  r /= dx;\n  if (dx < 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  } else if (dx > 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  }\n\n  r = y0 - ay;\n  if (!dy && r > 0) return;\n  r /= dy;\n  if (dy < 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  } else if (dy > 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  }\n\n  r = y1 - ay;\n  if (!dy && r < 0) return;\n  r /= dy;\n  if (dy < 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  } else if (dy > 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  }\n\n  if (!(t0 > 0) && !(t1 < 1)) return true; // TODO Better check?\n\n  if (t0 > 0) edge[0] = [ax + t0 * dx, ay + t0 * dy];\n  if (t1 < 1) edge[1] = [ax + t1 * dx, ay + t1 * dy];\n  return true;\n}\n\nfunction connectEdge(edge, x0, y0, x1, y1) {\n  var v1 = edge[1];\n  if (v1) return true;\n\n  var v0 = edge[0],\n      left = edge.left,\n      right = edge.right,\n      lx = left[0],\n      ly = left[1],\n      rx = right[0],\n      ry = right[1],\n      fx = (lx + rx) / 2,\n      fy = (ly + ry) / 2,\n      fm,\n      fb;\n\n  if (ry === ly) {\n    if (fx < x0 || fx >= x1) return;\n    if (lx > rx) {\n      if (!v0) v0 = [fx, y0];\n      else if (v0[1] >= y1) return;\n      v1 = [fx, y1];\n    } else {\n      if (!v0) v0 = [fx, y1];\n      else if (v0[1] < y0) return;\n      v1 = [fx, y0];\n    }\n  } else {\n    fm = (lx - rx) / (ry - ly);\n    fb = fy - fm * fx;\n    if (fm < -1 || fm > 1) {\n      if (lx > rx) {\n        if (!v0) v0 = [(y0 - fb) / fm, y0];\n        else if (v0[1] >= y1) return;\n        v1 = [(y1 - fb) / fm, y1];\n      } else {\n        if (!v0) v0 = [(y1 - fb) / fm, y1];\n        else if (v0[1] < y0) return;\n        v1 = [(y0 - fb) / fm, y0];\n      }\n    } else {\n      if (ly < ry) {\n        if (!v0) v0 = [x0, fm * x0 + fb];\n        else if (v0[0] >= x1) return;\n        v1 = [x1, fm * x1 + fb];\n      } else {\n        if (!v0) v0 = [x1, fm * x1 + fb];\n        else if (v0[0] < x0) return;\n        v1 = [x0, fm * x0 + fb];\n      }\n    }\n  }\n\n  edge[0] = v0;\n  edge[1] = v1;\n  return true;\n}\n\nfunction clipEdges(x0, y0, x1, y1) {\n  var i = edges.length,\n      edge;\n\n  while (i--) {\n    if (!connectEdge(edge = edges[i], x0, y0, x1, y1)\n        || !clipEdge(edge, x0, y0, x1, y1)\n        || !(Math.abs(edge[0][0] - edge[1][0]) > epsilon$4\n            || Math.abs(edge[0][1] - edge[1][1]) > epsilon$4)) {\n      delete edges[i];\n    }\n  }\n}\n\nfunction createCell(site) {\n  return cells[site.index] = {\n    site: site,\n    halfedges: []\n  };\n}\n\nfunction cellHalfedgeAngle(cell, edge) {\n  var site = cell.site,\n      va = edge.left,\n      vb = edge.right;\n  if (site === vb) vb = va, va = site;\n  if (vb) return Math.atan2(vb[1] - va[1], vb[0] - va[0]);\n  if (site === va) va = edge[1], vb = edge[0];\n  else va = edge[0], vb = edge[1];\n  return Math.atan2(va[0] - vb[0], vb[1] - va[1]);\n}\n\nfunction cellHalfedgeStart(cell, edge) {\n  return edge[+(edge.left !== cell.site)];\n}\n\nfunction cellHalfedgeEnd(cell, edge) {\n  return edge[+(edge.left === cell.site)];\n}\n\nfunction sortCellHalfedges() {\n  for (var i = 0, n = cells.length, cell, halfedges, j, m; i < n; ++i) {\n    if ((cell = cells[i]) && (m = (halfedges = cell.halfedges).length)) {\n      var index = new Array(m),\n          array = new Array(m);\n      for (j = 0; j < m; ++j) index[j] = j, array[j] = cellHalfedgeAngle(cell, edges[halfedges[j]]);\n      index.sort(function(i, j) { return array[j] - array[i]; });\n      for (j = 0; j < m; ++j) array[j] = halfedges[index[j]];\n      for (j = 0; j < m; ++j) halfedges[j] = array[j];\n    }\n  }\n}\n\nfunction clipCells(x0, y0, x1, y1) {\n  var nCells = cells.length,\n      iCell,\n      cell,\n      site,\n      iHalfedge,\n      halfedges,\n      nHalfedges,\n      start,\n      startX,\n      startY,\n      end,\n      endX,\n      endY,\n      cover = true;\n\n  for (iCell = 0; iCell < nCells; ++iCell) {\n    if (cell = cells[iCell]) {\n      site = cell.site;\n      halfedges = cell.halfedges;\n      iHalfedge = halfedges.length;\n\n      // Remove any dangling clipped edges.\n      while (iHalfedge--) {\n        if (!edges[halfedges[iHalfedge]]) {\n          halfedges.splice(iHalfedge, 1);\n        }\n      }\n\n      // Insert any border edges as necessary.\n      iHalfedge = 0, nHalfedges = halfedges.length;\n      while (iHalfedge < nHalfedges) {\n        end = cellHalfedgeEnd(cell, edges[halfedges[iHalfedge]]), endX = end[0], endY = end[1];\n        start = cellHalfedgeStart(cell, edges[halfedges[++iHalfedge % nHalfedges]]), startX = start[0], startY = start[1];\n        if (Math.abs(endX - startX) > epsilon$4 || Math.abs(endY - startY) > epsilon$4) {\n          halfedges.splice(iHalfedge, 0, edges.push(createBorderEdge(site, end,\n              Math.abs(endX - x0) < epsilon$4 && y1 - endY > epsilon$4 ? [x0, Math.abs(startX - x0) < epsilon$4 ? startY : y1]\n              : Math.abs(endY - y1) < epsilon$4 && x1 - endX > epsilon$4 ? [Math.abs(startY - y1) < epsilon$4 ? startX : x1, y1]\n              : Math.abs(endX - x1) < epsilon$4 && endY - y0 > epsilon$4 ? [x1, Math.abs(startX - x1) < epsilon$4 ? startY : y0]\n              : Math.abs(endY - y0) < epsilon$4 && endX - x0 > epsilon$4 ? [Math.abs(startY - y0) < epsilon$4 ? startX : x0, y0]\n              : null)) - 1);\n          ++nHalfedges;\n        }\n      }\n\n      if (nHalfedges) cover = false;\n    }\n  }\n\n  // If there weren’t any edges, have the closest site cover the extent.\n  // It doesn’t matter which corner of the extent we measure!\n  if (cover) {\n    var dx, dy, d2, dc = Infinity;\n\n    for (iCell = 0, cover = null; iCell < nCells; ++iCell) {\n      if (cell = cells[iCell]) {\n        site = cell.site;\n        dx = site[0] - x0;\n        dy = site[1] - y0;\n        d2 = dx * dx + dy * dy;\n        if (d2 < dc) dc = d2, cover = cell;\n      }\n    }\n\n    if (cover) {\n      var v00 = [x0, y0], v01 = [x0, y1], v11 = [x1, y1], v10 = [x1, y0];\n      cover.halfedges.push(\n        edges.push(createBorderEdge(site = cover.site, v00, v01)) - 1,\n        edges.push(createBorderEdge(site, v01, v11)) - 1,\n        edges.push(createBorderEdge(site, v11, v10)) - 1,\n        edges.push(createBorderEdge(site, v10, v00)) - 1\n      );\n    }\n  }\n\n  // Lastly delete any cells with no edges; these were entirely clipped.\n  for (iCell = 0; iCell < nCells; ++iCell) {\n    if (cell = cells[iCell]) {\n      if (!cell.halfedges.length) {\n        delete cells[iCell];\n      }\n    }\n  }\n}\n\nvar circlePool = [];\n\nvar firstCircle;\n\nfunction Circle() {\n  RedBlackNode(this);\n  this.x =\n  this.y =\n  this.arc =\n  this.site =\n  this.cy = null;\n}\n\nfunction attachCircle(arc) {\n  var lArc = arc.P,\n      rArc = arc.N;\n\n  if (!lArc || !rArc) return;\n\n  var lSite = lArc.site,\n      cSite = arc.site,\n      rSite = rArc.site;\n\n  if (lSite === rSite) return;\n\n  var bx = cSite[0],\n      by = cSite[1],\n      ax = lSite[0] - bx,\n      ay = lSite[1] - by,\n      cx = rSite[0] - bx,\n      cy = rSite[1] - by;\n\n  var d = 2 * (ax * cy - ay * cx);\n  if (d >= -epsilon2$2) return;\n\n  var ha = ax * ax + ay * ay,\n      hc = cx * cx + cy * cy,\n      x = (cy * ha - ay * hc) / d,\n      y = (ax * hc - cx * ha) / d;\n\n  var circle = circlePool.pop() || new Circle;\n  circle.arc = arc;\n  circle.site = cSite;\n  circle.x = x + bx;\n  circle.y = (circle.cy = y + by) + Math.sqrt(x * x + y * y); // y bottom\n\n  arc.circle = circle;\n\n  var before = null,\n      node = circles._;\n\n  while (node) {\n    if (circle.y < node.y || (circle.y === node.y && circle.x <= node.x)) {\n      if (node.L) node = node.L;\n      else { before = node.P; break; }\n    } else {\n      if (node.R) node = node.R;\n      else { before = node; break; }\n    }\n  }\n\n  circles.insert(before, circle);\n  if (!before) firstCircle = circle;\n}\n\nfunction detachCircle(arc) {\n  var circle = arc.circle;\n  if (circle) {\n    if (!circle.P) firstCircle = circle.N;\n    circles.remove(circle);\n    circlePool.push(circle);\n    RedBlackNode(circle);\n    arc.circle = null;\n  }\n}\n\nvar beachPool = [];\n\nfunction Beach() {\n  RedBlackNode(this);\n  this.edge =\n  this.site =\n  this.circle = null;\n}\n\nfunction createBeach(site) {\n  var beach = beachPool.pop() || new Beach;\n  beach.site = site;\n  return beach;\n}\n\nfunction detachBeach(beach) {\n  detachCircle(beach);\n  beaches.remove(beach);\n  beachPool.push(beach);\n  RedBlackNode(beach);\n}\n\nfunction removeBeach(beach) {\n  var circle = beach.circle,\n      x = circle.x,\n      y = circle.cy,\n      vertex = [x, y],\n      previous = beach.P,\n      next = beach.N,\n      disappearing = [beach];\n\n  detachBeach(beach);\n\n  var lArc = previous;\n  while (lArc.circle\n      && Math.abs(x - lArc.circle.x) < epsilon$4\n      && Math.abs(y - lArc.circle.cy) < epsilon$4) {\n    previous = lArc.P;\n    disappearing.unshift(lArc);\n    detachBeach(lArc);\n    lArc = previous;\n  }\n\n  disappearing.unshift(lArc);\n  detachCircle(lArc);\n\n  var rArc = next;\n  while (rArc.circle\n      && Math.abs(x - rArc.circle.x) < epsilon$4\n      && Math.abs(y - rArc.circle.cy) < epsilon$4) {\n    next = rArc.N;\n    disappearing.push(rArc);\n    detachBeach(rArc);\n    rArc = next;\n  }\n\n  disappearing.push(rArc);\n  detachCircle(rArc);\n\n  var nArcs = disappearing.length,\n      iArc;\n  for (iArc = 1; iArc < nArcs; ++iArc) {\n    rArc = disappearing[iArc];\n    lArc = disappearing[iArc - 1];\n    setEdgeEnd(rArc.edge, lArc.site, rArc.site, vertex);\n  }\n\n  lArc = disappearing[0];\n  rArc = disappearing[nArcs - 1];\n  rArc.edge = createEdge(lArc.site, rArc.site, null, vertex);\n\n  attachCircle(lArc);\n  attachCircle(rArc);\n}\n\nfunction addBeach(site) {\n  var x = site[0],\n      directrix = site[1],\n      lArc,\n      rArc,\n      dxl,\n      dxr,\n      node = beaches._;\n\n  while (node) {\n    dxl = leftBreakPoint(node, directrix) - x;\n    if (dxl > epsilon$4) node = node.L; else {\n      dxr = x - rightBreakPoint(node, directrix);\n      if (dxr > epsilon$4) {\n        if (!node.R) {\n          lArc = node;\n          break;\n        }\n        node = node.R;\n      } else {\n        if (dxl > -epsilon$4) {\n          lArc = node.P;\n          rArc = node;\n        } else if (dxr > -epsilon$4) {\n          lArc = node;\n          rArc = node.N;\n        } else {\n          lArc = rArc = node;\n        }\n        break;\n      }\n    }\n  }\n\n  createCell(site);\n  var newArc = createBeach(site);\n  beaches.insert(lArc, newArc);\n\n  if (!lArc && !rArc) return;\n\n  if (lArc === rArc) {\n    detachCircle(lArc);\n    rArc = createBeach(lArc.site);\n    beaches.insert(newArc, rArc);\n    newArc.edge = rArc.edge = createEdge(lArc.site, newArc.site);\n    attachCircle(lArc);\n    attachCircle(rArc);\n    return;\n  }\n\n  if (!rArc) { // && lArc\n    newArc.edge = createEdge(lArc.site, newArc.site);\n    return;\n  }\n\n  // else lArc !== rArc\n  detachCircle(lArc);\n  detachCircle(rArc);\n\n  var lSite = lArc.site,\n      ax = lSite[0],\n      ay = lSite[1],\n      bx = site[0] - ax,\n      by = site[1] - ay,\n      rSite = rArc.site,\n      cx = rSite[0] - ax,\n      cy = rSite[1] - ay,\n      d = 2 * (bx * cy - by * cx),\n      hb = bx * bx + by * by,\n      hc = cx * cx + cy * cy,\n      vertex = [(cy * hb - by * hc) / d + ax, (bx * hc - cx * hb) / d + ay];\n\n  setEdgeEnd(rArc.edge, lSite, rSite, vertex);\n  newArc.edge = createEdge(lSite, site, null, vertex);\n  rArc.edge = createEdge(site, rSite, null, vertex);\n  attachCircle(lArc);\n  attachCircle(rArc);\n}\n\nfunction leftBreakPoint(arc, directrix) {\n  var site = arc.site,\n      rfocx = site[0],\n      rfocy = site[1],\n      pby2 = rfocy - directrix;\n\n  if (!pby2) return rfocx;\n\n  var lArc = arc.P;\n  if (!lArc) return -Infinity;\n\n  site = lArc.site;\n  var lfocx = site[0],\n      lfocy = site[1],\n      plby2 = lfocy - directrix;\n\n  if (!plby2) return lfocx;\n\n  var hl = lfocx - rfocx,\n      aby2 = 1 / pby2 - 1 / plby2,\n      b = hl / plby2;\n\n  if (aby2) return (-b + Math.sqrt(b * b - 2 * aby2 * (hl * hl / (-2 * plby2) - lfocy + plby2 / 2 + rfocy - pby2 / 2))) / aby2 + rfocx;\n\n  return (rfocx + lfocx) / 2;\n}\n\nfunction rightBreakPoint(arc, directrix) {\n  var rArc = arc.N;\n  if (rArc) return leftBreakPoint(rArc, directrix);\n  var site = arc.site;\n  return site[1] === directrix ? site[0] : Infinity;\n}\n\nvar epsilon$4 = 1e-6;\nvar epsilon2$2 = 1e-12;\nvar beaches;\nvar cells;\nvar circles;\nvar edges;\n\nfunction triangleArea(a, b, c) {\n  return (a[0] - c[0]) * (b[1] - a[1]) - (a[0] - b[0]) * (c[1] - a[1]);\n}\n\nfunction lexicographic(a, b) {\n  return b[1] - a[1]\n      || b[0] - a[0];\n}\n\nfunction Diagram(sites, extent) {\n  var site = sites.sort(lexicographic).pop(),\n      x,\n      y,\n      circle;\n\n  edges = [];\n  cells = new Array(sites.length);\n  beaches = new RedBlackTree;\n  circles = new RedBlackTree;\n\n  while (true) {\n    circle = firstCircle;\n    if (site && (!circle || site[1] < circle.y || (site[1] === circle.y && site[0] < circle.x))) {\n      if (site[0] !== x || site[1] !== y) {\n        addBeach(site);\n        x = site[0], y = site[1];\n      }\n      site = sites.pop();\n    } else if (circle) {\n      removeBeach(circle.arc);\n    } else {\n      break;\n    }\n  }\n\n  sortCellHalfedges();\n\n  if (extent) {\n    var x0 = +extent[0][0],\n        y0 = +extent[0][1],\n        x1 = +extent[1][0],\n        y1 = +extent[1][1];\n    clipEdges(x0, y0, x1, y1);\n    clipCells(x0, y0, x1, y1);\n  }\n\n  this.edges = edges;\n  this.cells = cells;\n\n  beaches =\n  circles =\n  edges =\n  cells = null;\n}\n\nDiagram.prototype = {\n  constructor: Diagram,\n\n  polygons: function() {\n    var edges = this.edges;\n\n    return this.cells.map(function(cell) {\n      var polygon = cell.halfedges.map(function(i) { return cellHalfedgeStart(cell, edges[i]); });\n      polygon.data = cell.site.data;\n      return polygon;\n    });\n  },\n\n  triangles: function() {\n    var triangles = [],\n        edges = this.edges;\n\n    this.cells.forEach(function(cell, i) {\n      if (!(m = (halfedges = cell.halfedges).length)) return;\n      var site = cell.site,\n          halfedges,\n          j = -1,\n          m,\n          s0,\n          e1 = edges[halfedges[m - 1]],\n          s1 = e1.left === site ? e1.right : e1.left;\n\n      while (++j < m) {\n        s0 = s1;\n        e1 = edges[halfedges[j]];\n        s1 = e1.left === site ? e1.right : e1.left;\n        if (s0 && s1 && i < s0.index && i < s1.index && triangleArea(site, s0, s1) < 0) {\n          triangles.push([site.data, s0.data, s1.data]);\n        }\n      }\n    });\n\n    return triangles;\n  },\n\n  links: function() {\n    return this.edges.filter(function(edge) {\n      return edge.right;\n    }).map(function(edge) {\n      return {\n        source: edge.left.data,\n        target: edge.right.data\n      };\n    });\n  },\n\n  find: function(x, y, radius) {\n    var that = this, i0, i1 = that._found || 0, n = that.cells.length, cell;\n\n    // Use the previously-found cell, or start with an arbitrary one.\n    while (!(cell = that.cells[i1])) if (++i1 >= n) return null;\n    var dx = x - cell.site[0], dy = y - cell.site[1], d2 = dx * dx + dy * dy;\n\n    // Traverse the half-edges to find a closer cell, if any.\n    do {\n      cell = that.cells[i0 = i1], i1 = null;\n      cell.halfedges.forEach(function(e) {\n        var edge = that.edges[e], v = edge.left;\n        if ((v === cell.site || !v) && !(v = edge.right)) return;\n        var vx = x - v[0], vy = y - v[1], v2 = vx * vx + vy * vy;\n        if (v2 < d2) d2 = v2, i1 = v.index;\n      });\n    } while (i1 !== null);\n\n    that._found = i0;\n\n    return radius == null || d2 <= radius * radius ? cell.site : null;\n  }\n};\n\nfunction voronoi() {\n  var x = x$4,\n      y = y$4,\n      extent = null;\n\n  function voronoi(data) {\n    return new Diagram(data.map(function(d, i) {\n      var s = [Math.round(x(d, i, data) / epsilon$4) * epsilon$4, Math.round(y(d, i, data) / epsilon$4) * epsilon$4];\n      s.index = i;\n      s.data = d;\n      return s;\n    }), extent);\n  }\n\n  voronoi.polygons = function(data) {\n    return voronoi(data).polygons();\n  };\n\n  voronoi.links = function(data) {\n    return voronoi(data).links();\n  };\n\n  voronoi.triangles = function(data) {\n    return voronoi(data).triangles();\n  };\n\n  voronoi.x = function(_) {\n    return arguments.length ? (x = typeof _ === \"function\" ? _ : constant$c(+_), voronoi) : x;\n  };\n\n  voronoi.y = function(_) {\n    return arguments.length ? (y = typeof _ === \"function\" ? _ : constant$c(+_), voronoi) : y;\n  };\n\n  voronoi.extent = function(_) {\n    return arguments.length ? (extent = _ == null ? null : [[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]], voronoi) : extent && [[extent[0][0], extent[0][1]], [extent[1][0], extent[1][1]]];\n  };\n\n  voronoi.size = function(_) {\n    return arguments.length ? (extent = _ == null ? null : [[0, 0], [+_[0], +_[1]]], voronoi) : extent && [extent[1][0] - extent[0][0], extent[1][1] - extent[0][1]];\n  };\n\n  return voronoi;\n}\n\nfunction constant$d(x) {\n  return function() {\n    return x;\n  };\n}\n\nfunction ZoomEvent(target, type, transform) {\n  this.target = target;\n  this.type = type;\n  this.transform = transform;\n}\n\nfunction Transform(k, x, y) {\n  this.k = k;\n  this.x = x;\n  this.y = y;\n}\n\nTransform.prototype = {\n  constructor: Transform,\n  scale: function(k) {\n    return k === 1 ? this : new Transform(this.k * k, this.x, this.y);\n  },\n  translate: function(x, y) {\n    return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);\n  },\n  apply: function(point) {\n    return [point[0] * this.k + this.x, point[1] * this.k + this.y];\n  },\n  applyX: function(x) {\n    return x * this.k + this.x;\n  },\n  applyY: function(y) {\n    return y * this.k + this.y;\n  },\n  invert: function(location) {\n    return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];\n  },\n  invertX: function(x) {\n    return (x - this.x) / this.k;\n  },\n  invertY: function(y) {\n    return (y - this.y) / this.k;\n  },\n  rescaleX: function(x) {\n    return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));\n  },\n  rescaleY: function(y) {\n    return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));\n  },\n  toString: function() {\n    return \"translate(\" + this.x + \",\" + this.y + \") scale(\" + this.k + \")\";\n  }\n};\n\nvar identity$9 = new Transform(1, 0, 0);\n\ntransform$1.prototype = Transform.prototype;\n\nfunction transform$1(node) {\n  while (!node.__zoom) if (!(node = node.parentNode)) return identity$9;\n  return node.__zoom;\n}\n\nfunction nopropagation$2() {\n  exports.event.stopImmediatePropagation();\n}\n\nfunction noevent$2() {\n  exports.event.preventDefault();\n  exports.event.stopImmediatePropagation();\n}\n\n// Ignore right-click, since that should open the context menu.\nfunction defaultFilter$2() {\n  return !exports.event.ctrlKey && !exports.event.button;\n}\n\nfunction defaultExtent$1() {\n  var e = this;\n  if (e instanceof SVGElement) {\n    e = e.ownerSVGElement || e;\n    if (e.hasAttribute(\"viewBox\")) {\n      e = e.viewBox.baseVal;\n      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];\n    }\n    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];\n  }\n  return [[0, 0], [e.clientWidth, e.clientHeight]];\n}\n\nfunction defaultTransform() {\n  return this.__zoom || identity$9;\n}\n\nfunction defaultWheelDelta() {\n  return -exports.event.deltaY * (exports.event.deltaMode === 1 ? 0.05 : exports.event.deltaMode ? 1 : 0.002);\n}\n\nfunction defaultTouchable$2() {\n  return navigator.maxTouchPoints || (\"ontouchstart\" in this);\n}\n\nfunction defaultConstrain(transform, extent, translateExtent) {\n  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],\n      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],\n      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],\n      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];\n  return transform.translate(\n    dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),\n    dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)\n  );\n}\n\nfunction zoom() {\n  var filter = defaultFilter$2,\n      extent = defaultExtent$1,\n      constrain = defaultConstrain,\n      wheelDelta = defaultWheelDelta,\n      touchable = defaultTouchable$2,\n      scaleExtent = [0, Infinity],\n      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],\n      duration = 250,\n      interpolate = interpolateZoom,\n      listeners = dispatch(\"start\", \"zoom\", \"end\"),\n      touchstarting,\n      touchending,\n      touchDelay = 500,\n      wheelDelay = 150,\n      clickDistance2 = 0;\n\n  function zoom(selection) {\n    selection\n        .property(\"__zoom\", defaultTransform)\n        .on(\"wheel.zoom\", wheeled)\n        .on(\"mousedown.zoom\", mousedowned)\n        .on(\"dblclick.zoom\", dblclicked)\n      .filter(touchable)\n        .on(\"touchstart.zoom\", touchstarted)\n        .on(\"touchmove.zoom\", touchmoved)\n        .on(\"touchend.zoom touchcancel.zoom\", touchended)\n        .style(\"touch-action\", \"none\")\n        .style(\"-webkit-tap-highlight-color\", \"rgba(0,0,0,0)\");\n  }\n\n  zoom.transform = function(collection, transform, point) {\n    var selection = collection.selection ? collection.selection() : collection;\n    selection.property(\"__zoom\", defaultTransform);\n    if (collection !== selection) {\n      schedule(collection, transform, point);\n    } else {\n      selection.interrupt().each(function() {\n        gesture(this, arguments)\n            .start()\n            .zoom(null, typeof transform === \"function\" ? transform.apply(this, arguments) : transform)\n            .end();\n      });\n    }\n  };\n\n  zoom.scaleBy = function(selection, k, p) {\n    zoom.scaleTo(selection, function() {\n      var k0 = this.__zoom.k,\n          k1 = typeof k === \"function\" ? k.apply(this, arguments) : k;\n      return k0 * k1;\n    }, p);\n  };\n\n  zoom.scaleTo = function(selection, k, p) {\n    zoom.transform(selection, function() {\n      var e = extent.apply(this, arguments),\n          t0 = this.__zoom,\n          p0 = p == null ? centroid(e) : typeof p === \"function\" ? p.apply(this, arguments) : p,\n          p1 = t0.invert(p0),\n          k1 = typeof k === \"function\" ? k.apply(this, arguments) : k;\n      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);\n    }, p);\n  };\n\n  zoom.translateBy = function(selection, x, y) {\n    zoom.transform(selection, function() {\n      return constrain(this.__zoom.translate(\n        typeof x === \"function\" ? x.apply(this, arguments) : x,\n        typeof y === \"function\" ? y.apply(this, arguments) : y\n      ), extent.apply(this, arguments), translateExtent);\n    });\n  };\n\n  zoom.translateTo = function(selection, x, y, p) {\n    zoom.transform(selection, function() {\n      var e = extent.apply(this, arguments),\n          t = this.__zoom,\n          p0 = p == null ? centroid(e) : typeof p === \"function\" ? p.apply(this, arguments) : p;\n      return constrain(identity$9.translate(p0[0], p0[1]).scale(t.k).translate(\n        typeof x === \"function\" ? -x.apply(this, arguments) : -x,\n        typeof y === \"function\" ? -y.apply(this, arguments) : -y\n      ), e, translateExtent);\n    }, p);\n  };\n\n  function scale(transform, k) {\n    k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));\n    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);\n  }\n\n  function translate(transform, p0, p1) {\n    var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;\n    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);\n  }\n\n  function centroid(extent) {\n    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];\n  }\n\n  function schedule(transition, transform, point) {\n    transition\n        .on(\"start.zoom\", function() { gesture(this, arguments).start(); })\n        .on(\"interrupt.zoom end.zoom\", function() { gesture(this, arguments).end(); })\n        .tween(\"zoom\", function() {\n          var that = this,\n              args = arguments,\n              g = gesture(that, args),\n              e = extent.apply(that, args),\n              p = point == null ? centroid(e) : typeof point === \"function\" ? point.apply(that, args) : point,\n              w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),\n              a = that.__zoom,\n              b = typeof transform === \"function\" ? transform.apply(that, args) : transform,\n              i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));\n          return function(t) {\n            if (t === 1) t = b; // Avoid rounding error on end.\n            else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }\n            g.zoom(null, t);\n          };\n        });\n  }\n\n  function gesture(that, args, clean) {\n    return (!clean && that.__zooming) || new Gesture(that, args);\n  }\n\n  function Gesture(that, args) {\n    this.that = that;\n    this.args = args;\n    this.active = 0;\n    this.extent = extent.apply(that, args);\n    this.taps = 0;\n  }\n\n  Gesture.prototype = {\n    start: function() {\n      if (++this.active === 1) {\n        this.that.__zooming = this;\n        this.emit(\"start\");\n      }\n      return this;\n    },\n    zoom: function(key, transform) {\n      if (this.mouse && key !== \"mouse\") this.mouse[1] = transform.invert(this.mouse[0]);\n      if (this.touch0 && key !== \"touch\") this.touch0[1] = transform.invert(this.touch0[0]);\n      if (this.touch1 && key !== \"touch\") this.touch1[1] = transform.invert(this.touch1[0]);\n      this.that.__zoom = transform;\n      this.emit(\"zoom\");\n      return this;\n    },\n    end: function() {\n      if (--this.active === 0) {\n        delete this.that.__zooming;\n        this.emit(\"end\");\n      }\n      return this;\n    },\n    emit: function(type) {\n      customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]);\n    }\n  };\n\n  function wheeled() {\n    if (!filter.apply(this, arguments)) return;\n    var g = gesture(this, arguments),\n        t = this.__zoom,\n        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),\n        p = mouse(this);\n\n    // If the mouse is in the same location as before, reuse it.\n    // If there were recent wheel events, reset the wheel idle timeout.\n    if (g.wheel) {\n      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {\n        g.mouse[1] = t.invert(g.mouse[0] = p);\n      }\n      clearTimeout(g.wheel);\n    }\n\n    // If this wheel event won’t trigger a transform change, ignore it.\n    else if (t.k === k) return;\n\n    // Otherwise, capture the mouse point and location at the start.\n    else {\n      g.mouse = [p, t.invert(p)];\n      interrupt(this);\n      g.start();\n    }\n\n    noevent$2();\n    g.wheel = setTimeout(wheelidled, wheelDelay);\n    g.zoom(\"mouse\", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));\n\n    function wheelidled() {\n      g.wheel = null;\n      g.end();\n    }\n  }\n\n  function mousedowned() {\n    if (touchending || !filter.apply(this, arguments)) return;\n    var g = gesture(this, arguments, true),\n        v = select(exports.event.view).on(\"mousemove.zoom\", mousemoved, true).on(\"mouseup.zoom\", mouseupped, true),\n        p = mouse(this),\n        x0 = exports.event.clientX,\n        y0 = exports.event.clientY;\n\n    dragDisable(exports.event.view);\n    nopropagation$2();\n    g.mouse = [p, this.__zoom.invert(p)];\n    interrupt(this);\n    g.start();\n\n    function mousemoved() {\n      noevent$2();\n      if (!g.moved) {\n        var dx = exports.event.clientX - x0, dy = exports.event.clientY - y0;\n        g.moved = dx * dx + dy * dy > clickDistance2;\n      }\n      g.zoom(\"mouse\", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent, translateExtent));\n    }\n\n    function mouseupped() {\n      v.on(\"mousemove.zoom mouseup.zoom\", null);\n      yesdrag(exports.event.view, g.moved);\n      noevent$2();\n      g.end();\n    }\n  }\n\n  function dblclicked() {\n    if (!filter.apply(this, arguments)) return;\n    var t0 = this.__zoom,\n        p0 = mouse(this),\n        p1 = t0.invert(p0),\n        k1 = t0.k * (exports.event.shiftKey ? 0.5 : 2),\n        t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments), translateExtent);\n\n    noevent$2();\n    if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0);\n    else select(this).call(zoom.transform, t1);\n  }\n\n  function touchstarted() {\n    if (!filter.apply(this, arguments)) return;\n    var touches = exports.event.touches,\n        n = touches.length,\n        g = gesture(this, arguments, exports.event.changedTouches.length === n),\n        started, i, t, p;\n\n    nopropagation$2();\n    for (i = 0; i < n; ++i) {\n      t = touches[i], p = touch(this, touches, t.identifier);\n      p = [p, this.__zoom.invert(p), t.identifier];\n      if (!g.touch0) g.touch0 = p, started = true, g.taps = 1 + !!touchstarting;\n      else if (!g.touch1 && g.touch0[2] !== p[2]) g.touch1 = p, g.taps = 0;\n    }\n\n    if (touchstarting) touchstarting = clearTimeout(touchstarting);\n\n    if (started) {\n      if (g.taps < 2) touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay);\n      interrupt(this);\n      g.start();\n    }\n  }\n\n  function touchmoved() {\n    if (!this.__zooming) return;\n    var g = gesture(this, arguments),\n        touches = exports.event.changedTouches,\n        n = touches.length, i, t, p, l;\n\n    noevent$2();\n    if (touchstarting) touchstarting = clearTimeout(touchstarting);\n    g.taps = 0;\n    for (i = 0; i < n; ++i) {\n      t = touches[i], p = touch(this, touches, t.identifier);\n      if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;\n      else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;\n    }\n    t = g.that.__zoom;\n    if (g.touch1) {\n      var p0 = g.touch0[0], l0 = g.touch0[1],\n          p1 = g.touch1[0], l1 = g.touch1[1],\n          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,\n          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;\n      t = scale(t, Math.sqrt(dp / dl));\n      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];\n      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];\n    }\n    else if (g.touch0) p = g.touch0[0], l = g.touch0[1];\n    else return;\n    g.zoom(\"touch\", constrain(translate(t, p, l), g.extent, translateExtent));\n  }\n\n  function touchended() {\n    if (!this.__zooming) return;\n    var g = gesture(this, arguments),\n        touches = exports.event.changedTouches,\n        n = touches.length, i, t;\n\n    nopropagation$2();\n    if (touchending) clearTimeout(touchending);\n    touchending = setTimeout(function() { touchending = null; }, touchDelay);\n    for (i = 0; i < n; ++i) {\n      t = touches[i];\n      if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;\n      else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;\n    }\n    if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;\n    if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);\n    else {\n      g.end();\n      // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.\n      if (g.taps === 2) {\n        var p = select(this).on(\"dblclick.zoom\");\n        if (p) p.apply(this, arguments);\n      }\n    }\n  }\n\n  zoom.wheelDelta = function(_) {\n    return arguments.length ? (wheelDelta = typeof _ === \"function\" ? _ : constant$d(+_), zoom) : wheelDelta;\n  };\n\n  zoom.filter = function(_) {\n    return arguments.length ? (filter = typeof _ === \"function\" ? _ : constant$d(!!_), zoom) : filter;\n  };\n\n  zoom.touchable = function(_) {\n    return arguments.length ? (touchable = typeof _ === \"function\" ? _ : constant$d(!!_), zoom) : touchable;\n  };\n\n  zoom.extent = function(_) {\n    return arguments.length ? (extent = typeof _ === \"function\" ? _ : constant$d([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;\n  };\n\n  zoom.scaleExtent = function(_) {\n    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];\n  };\n\n  zoom.translateExtent = function(_) {\n    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];\n  };\n\n  zoom.constrain = function(_) {\n    return arguments.length ? (constrain = _, zoom) : constrain;\n  };\n\n  zoom.duration = function(_) {\n    return arguments.length ? (duration = +_, zoom) : duration;\n  };\n\n  zoom.interpolate = function(_) {\n    return arguments.length ? (interpolate = _, zoom) : interpolate;\n  };\n\n  zoom.on = function() {\n    var value = listeners.on.apply(listeners, arguments);\n    return value === listeners ? zoom : value;\n  };\n\n  zoom.clickDistance = function(_) {\n    return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);\n  };\n\n  return zoom;\n}\n\nexports.FormatSpecifier = FormatSpecifier;\nexports.active = active;\nexports.arc = arc;\nexports.area = area$3;\nexports.areaRadial = areaRadial;\nexports.ascending = ascending;\nexports.autoType = autoType;\nexports.axisBottom = axisBottom;\nexports.axisLeft = axisLeft;\nexports.axisRight = axisRight;\nexports.axisTop = axisTop;\nexports.bisect = bisectRight;\nexports.bisectLeft = bisectLeft;\nexports.bisectRight = bisectRight;\nexports.bisector = bisector;\nexports.blob = blob;\nexports.brush = brush;\nexports.brushSelection = brushSelection;\nexports.brushX = brushX;\nexports.brushY = brushY;\nexports.buffer = buffer;\nexports.chord = chord;\nexports.clientPoint = point;\nexports.cluster = cluster;\nexports.color = color;\nexports.contourDensity = density;\nexports.contours = contours;\nexports.create = create;\nexports.creator = creator;\nexports.cross = cross;\nexports.csv = csv$1;\nexports.csvFormat = csvFormat;\nexports.csvFormatBody = csvFormatBody;\nexports.csvFormatRow = csvFormatRow;\nexports.csvFormatRows = csvFormatRows;\nexports.csvFormatValue = csvFormatValue;\nexports.csvParse = csvParse;\nexports.csvParseRows = csvParseRows;\nexports.cubehelix = cubehelix;\nexports.curveBasis = basis$2;\nexports.curveBasisClosed = basisClosed$1;\nexports.curveBasisOpen = basisOpen;\nexports.curveBundle = bundle;\nexports.curveCardinal = cardinal;\nexports.curveCardinalClosed = cardinalClosed;\nexports.curveCardinalOpen = cardinalOpen;\nexports.curveCatmullRom = catmullRom;\nexports.curveCatmullRomClosed = catmullRomClosed;\nexports.curveCatmullRomOpen = catmullRomOpen;\nexports.curveLinear = curveLinear;\nexports.curveLinearClosed = linearClosed;\nexports.curveMonotoneX = monotoneX;\nexports.curveMonotoneY = monotoneY;\nexports.curveNatural = natural;\nexports.curveStep = step;\nexports.curveStepAfter = stepAfter;\nexports.curveStepBefore = stepBefore;\nexports.customEvent = customEvent;\nexports.descending = descending;\nexports.deviation = deviation;\nexports.dispatch = dispatch;\nexports.drag = drag;\nexports.dragDisable = dragDisable;\nexports.dragEnable = yesdrag;\nexports.dsv = dsv;\nexports.dsvFormat = dsvFormat;\nexports.easeBack = backInOut;\nexports.easeBackIn = backIn;\nexports.easeBackInOut = backInOut;\nexports.easeBackOut = backOut;\nexports.easeBounce = bounceOut;\nexports.easeBounceIn = bounceIn;\nexports.easeBounceInOut = bounceInOut;\nexports.easeBounceOut = bounceOut;\nexports.easeCircle = circleInOut;\nexports.easeCircleIn = circleIn;\nexports.easeCircleInOut = circleInOut;\nexports.easeCircleOut = circleOut;\nexports.easeCubic = cubicInOut;\nexports.easeCubicIn = cubicIn;\nexports.easeCubicInOut = cubicInOut;\nexports.easeCubicOut = cubicOut;\nexports.easeElastic = elasticOut;\nexports.easeElasticIn = elasticIn;\nexports.easeElasticInOut = elasticInOut;\nexports.easeElasticOut = elasticOut;\nexports.easeExp = expInOut;\nexports.easeExpIn = expIn;\nexports.easeExpInOut = expInOut;\nexports.easeExpOut = expOut;\nexports.easeLinear = linear$1;\nexports.easePoly = polyInOut;\nexports.easePolyIn = polyIn;\nexports.easePolyInOut = polyInOut;\nexports.easePolyOut = polyOut;\nexports.easeQuad = quadInOut;\nexports.easeQuadIn = quadIn;\nexports.easeQuadInOut = quadInOut;\nexports.easeQuadOut = quadOut;\nexports.easeSin = sinInOut;\nexports.easeSinIn = sinIn;\nexports.easeSinInOut = sinInOut;\nexports.easeSinOut = sinOut;\nexports.entries = entries;\nexports.extent = extent;\nexports.forceCenter = center$1;\nexports.forceCollide = collide;\nexports.forceLink = link;\nexports.forceManyBody = manyBody;\nexports.forceRadial = radial;\nexports.forceSimulation = simulation;\nexports.forceX = x$2;\nexports.forceY = y$2;\nexports.formatDefaultLocale = defaultLocale;\nexports.formatLocale = formatLocale;\nexports.formatSpecifier = formatSpecifier;\nexports.geoAlbers = albers;\nexports.geoAlbersUsa = albersUsa;\nexports.geoArea = area$1;\nexports.geoAzimuthalEqualArea = azimuthalEqualArea;\nexports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw;\nexports.geoAzimuthalEquidistant = azimuthalEquidistant;\nexports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw;\nexports.geoBounds = bounds;\nexports.geoCentroid = centroid;\nexports.geoCircle = circle;\nexports.geoClipAntimeridian = clipAntimeridian;\nexports.geoClipCircle = clipCircle;\nexports.geoClipExtent = extent$1;\nexports.geoClipRectangle = clipRectangle;\nexports.geoConicConformal = conicConformal;\nexports.geoConicConformalRaw = conicConformalRaw;\nexports.geoConicEqualArea = conicEqualArea;\nexports.geoConicEqualAreaRaw = conicEqualAreaRaw;\nexports.geoConicEquidistant = conicEquidistant;\nexports.geoConicEquidistantRaw = conicEquidistantRaw;\nexports.geoContains = contains$1;\nexports.geoDistance = distance;\nexports.geoEqualEarth = equalEarth;\nexports.geoEqualEarthRaw = equalEarthRaw;\nexports.geoEquirectangular = equirectangular;\nexports.geoEquirectangularRaw = equirectangularRaw;\nexports.geoGnomonic = gnomonic;\nexports.geoGnomonicRaw = gnomonicRaw;\nexports.geoGraticule = graticule;\nexports.geoGraticule10 = graticule10;\nexports.geoIdentity = identity$5;\nexports.geoInterpolate = interpolate$1;\nexports.geoLength = length$1;\nexports.geoMercator = mercator;\nexports.geoMercatorRaw = mercatorRaw;\nexports.geoNaturalEarth1 = naturalEarth1;\nexports.geoNaturalEarth1Raw = naturalEarth1Raw;\nexports.geoOrthographic = orthographic;\nexports.geoOrthographicRaw = orthographicRaw;\nexports.geoPath = index$1;\nexports.geoProjection = projection;\nexports.geoProjectionMutator = projectionMutator;\nexports.geoRotation = rotation;\nexports.geoStereographic = stereographic;\nexports.geoStereographicRaw = stereographicRaw;\nexports.geoStream = geoStream;\nexports.geoTransform = transform;\nexports.geoTransverseMercator = transverseMercator;\nexports.geoTransverseMercatorRaw = transverseMercatorRaw;\nexports.gray = gray;\nexports.hcl = hcl;\nexports.hierarchy = hierarchy;\nexports.histogram = histogram;\nexports.hsl = hsl;\nexports.html = html;\nexports.image = image;\nexports.interpolate = interpolateValue;\nexports.interpolateArray = array$1;\nexports.interpolateBasis = basis$1;\nexports.interpolateBasisClosed = basisClosed;\nexports.interpolateBlues = Blues;\nexports.interpolateBrBG = BrBG;\nexports.interpolateBuGn = BuGn;\nexports.interpolateBuPu = BuPu;\nexports.interpolateCividis = cividis;\nexports.interpolateCool = cool;\nexports.interpolateCubehelix = cubehelix$2;\nexports.interpolateCubehelixDefault = cubehelix$3;\nexports.interpolateCubehelixLong = cubehelixLong;\nexports.interpolateDate = date;\nexports.interpolateDiscrete = discrete;\nexports.interpolateGnBu = GnBu;\nexports.interpolateGreens = Greens;\nexports.interpolateGreys = Greys;\nexports.interpolateHcl = hcl$2;\nexports.interpolateHclLong = hclLong;\nexports.interpolateHsl = hsl$2;\nexports.interpolateHslLong = hslLong;\nexports.interpolateHue = hue$1;\nexports.interpolateInferno = inferno;\nexports.interpolateLab = lab$1;\nexports.interpolateMagma = magma;\nexports.interpolateNumber = interpolateNumber;\nexports.interpolateNumberArray = numberArray;\nexports.interpolateObject = object;\nexports.interpolateOrRd = OrRd;\nexports.interpolateOranges = Oranges;\nexports.interpolatePRGn = PRGn;\nexports.interpolatePiYG = PiYG;\nexports.interpolatePlasma = plasma;\nexports.interpolatePuBu = PuBu;\nexports.interpolatePuBuGn = PuBuGn;\nexports.interpolatePuOr = PuOr;\nexports.interpolatePuRd = PuRd;\nexports.interpolatePurples = Purples;\nexports.interpolateRainbow = rainbow;\nexports.interpolateRdBu = RdBu;\nexports.interpolateRdGy = RdGy;\nexports.interpolateRdPu = RdPu;\nexports.interpolateRdYlBu = RdYlBu;\nexports.interpolateRdYlGn = RdYlGn;\nexports.interpolateReds = Reds;\nexports.interpolateRgb = interpolateRgb;\nexports.interpolateRgbBasis = rgbBasis;\nexports.interpolateRgbBasisClosed = rgbBasisClosed;\nexports.interpolateRound = interpolateRound;\nexports.interpolateSinebow = sinebow;\nexports.interpolateSpectral = Spectral;\nexports.interpolateString = interpolateString;\nexports.interpolateTransformCss = interpolateTransformCss;\nexports.interpolateTransformSvg = interpolateTransformSvg;\nexports.interpolateTurbo = turbo;\nexports.interpolateViridis = viridis;\nexports.interpolateWarm = warm;\nexports.interpolateYlGn = YlGn;\nexports.interpolateYlGnBu = YlGnBu;\nexports.interpolateYlOrBr = YlOrBr;\nexports.interpolateYlOrRd = YlOrRd;\nexports.interpolateZoom = interpolateZoom;\nexports.interrupt = interrupt;\nexports.interval = interval$1;\nexports.isoFormat = formatIso;\nexports.isoParse = parseIso;\nexports.json = json;\nexports.keys = keys;\nexports.lab = lab;\nexports.lch = lch;\nexports.line = line;\nexports.lineRadial = lineRadial$1;\nexports.linkHorizontal = linkHorizontal;\nexports.linkRadial = linkRadial;\nexports.linkVertical = linkVertical;\nexports.local = local;\nexports.map = map$1;\nexports.matcher = matcher;\nexports.max = max;\nexports.mean = mean;\nexports.median = median;\nexports.merge = merge;\nexports.min = min;\nexports.mouse = mouse;\nexports.namespace = namespace;\nexports.namespaces = namespaces;\nexports.nest = nest;\nexports.now = now;\nexports.pack = index$2;\nexports.packEnclose = enclose;\nexports.packSiblings = siblings;\nexports.pairs = pairs;\nexports.partition = partition;\nexports.path = path;\nexports.permute = permute;\nexports.pie = pie;\nexports.piecewise = piecewise;\nexports.pointRadial = pointRadial;\nexports.polygonArea = area$2;\nexports.polygonCentroid = centroid$1;\nexports.polygonContains = contains$2;\nexports.polygonHull = hull;\nexports.polygonLength = length$2;\nexports.precisionFixed = precisionFixed;\nexports.precisionPrefix = precisionPrefix;\nexports.precisionRound = precisionRound;\nexports.quadtree = quadtree;\nexports.quantile = threshold;\nexports.quantize = quantize;\nexports.radialArea = areaRadial;\nexports.radialLine = lineRadial$1;\nexports.randomBates = bates;\nexports.randomExponential = exponential$1;\nexports.randomIrwinHall = irwinHall;\nexports.randomLogNormal = logNormal;\nexports.randomNormal = normal;\nexports.randomUniform = uniform;\nexports.range = sequence;\nexports.rgb = rgb;\nexports.ribbon = ribbon;\nexports.scaleBand = band;\nexports.scaleDiverging = diverging;\nexports.scaleDivergingLog = divergingLog;\nexports.scaleDivergingPow = divergingPow;\nexports.scaleDivergingSqrt = divergingSqrt;\nexports.scaleDivergingSymlog = divergingSymlog;\nexports.scaleIdentity = identity$7;\nexports.scaleImplicit = implicit;\nexports.scaleLinear = linear$2;\nexports.scaleLog = log$1;\nexports.scaleOrdinal = ordinal;\nexports.scalePoint = point$1;\nexports.scalePow = pow$1;\nexports.scaleQuantile = quantile;\nexports.scaleQuantize = quantize$1;\nexports.scaleSequential = sequential;\nexports.scaleSequentialLog = sequentialLog;\nexports.scaleSequentialPow = sequentialPow;\nexports.scaleSequentialQuantile = sequentialQuantile;\nexports.scaleSequentialSqrt = sequentialSqrt;\nexports.scaleSequentialSymlog = sequentialSymlog;\nexports.scaleSqrt = sqrt$1;\nexports.scaleSymlog = symlog;\nexports.scaleThreshold = threshold$1;\nexports.scaleTime = time;\nexports.scaleUtc = utcTime;\nexports.scan = scan;\nexports.schemeAccent = Accent;\nexports.schemeBlues = scheme$l;\nexports.schemeBrBG = scheme;\nexports.schemeBuGn = scheme$9;\nexports.schemeBuPu = scheme$a;\nexports.schemeCategory10 = category10;\nexports.schemeDark2 = Dark2;\nexports.schemeGnBu = scheme$b;\nexports.schemeGreens = scheme$m;\nexports.schemeGreys = scheme$n;\nexports.schemeOrRd = scheme$c;\nexports.schemeOranges = scheme$q;\nexports.schemePRGn = scheme$1;\nexports.schemePaired = Paired;\nexports.schemePastel1 = Pastel1;\nexports.schemePastel2 = Pastel2;\nexports.schemePiYG = scheme$2;\nexports.schemePuBu = scheme$e;\nexports.schemePuBuGn = scheme$d;\nexports.schemePuOr = scheme$3;\nexports.schemePuRd = scheme$f;\nexports.schemePurples = scheme$o;\nexports.schemeRdBu = scheme$4;\nexports.schemeRdGy = scheme$5;\nexports.schemeRdPu = scheme$g;\nexports.schemeRdYlBu = scheme$6;\nexports.schemeRdYlGn = scheme$7;\nexports.schemeReds = scheme$p;\nexports.schemeSet1 = Set1;\nexports.schemeSet2 = Set2;\nexports.schemeSet3 = Set3;\nexports.schemeSpectral = scheme$8;\nexports.schemeTableau10 = Tableau10;\nexports.schemeYlGn = scheme$i;\nexports.schemeYlGnBu = scheme$h;\nexports.schemeYlOrBr = scheme$j;\nexports.schemeYlOrRd = scheme$k;\nexports.select = select;\nexports.selectAll = selectAll;\nexports.selection = selection;\nexports.selector = selector;\nexports.selectorAll = selectorAll;\nexports.set = set$2;\nexports.shuffle = shuffle;\nexports.stack = stack;\nexports.stackOffsetDiverging = diverging$1;\nexports.stackOffsetExpand = expand;\nexports.stackOffsetNone = none$1;\nexports.stackOffsetSilhouette = silhouette;\nexports.stackOffsetWiggle = wiggle;\nexports.stackOrderAppearance = appearance;\nexports.stackOrderAscending = ascending$3;\nexports.stackOrderDescending = descending$2;\nexports.stackOrderInsideOut = insideOut;\nexports.stackOrderNone = none$2;\nexports.stackOrderReverse = reverse;\nexports.stratify = stratify;\nexports.style = styleValue;\nexports.sum = sum;\nexports.svg = svg;\nexports.symbol = symbol;\nexports.symbolCircle = circle$2;\nexports.symbolCross = cross$2;\nexports.symbolDiamond = diamond;\nexports.symbolSquare = square;\nexports.symbolStar = star;\nexports.symbolTriangle = triangle;\nexports.symbolWye = wye;\nexports.symbols = symbols;\nexports.text = text;\nexports.thresholdFreedmanDiaconis = freedmanDiaconis;\nexports.thresholdScott = scott;\nexports.thresholdSturges = thresholdSturges;\nexports.tickFormat = tickFormat;\nexports.tickIncrement = tickIncrement;\nexports.tickStep = tickStep;\nexports.ticks = ticks;\nexports.timeDay = day;\nexports.timeDays = days;\nexports.timeFormatDefaultLocale = defaultLocale$1;\nexports.timeFormatLocale = formatLocale$1;\nexports.timeFriday = friday;\nexports.timeFridays = fridays;\nexports.timeHour = hour;\nexports.timeHours = hours;\nexports.timeInterval = newInterval;\nexports.timeMillisecond = millisecond;\nexports.timeMilliseconds = milliseconds;\nexports.timeMinute = minute;\nexports.timeMinutes = minutes;\nexports.timeMonday = monday;\nexports.timeMondays = mondays;\nexports.timeMonth = month;\nexports.timeMonths = months;\nexports.timeSaturday = saturday;\nexports.timeSaturdays = saturdays;\nexports.timeSecond = second;\nexports.timeSeconds = seconds;\nexports.timeSunday = sunday;\nexports.timeSundays = sundays;\nexports.timeThursday = thursday;\nexports.timeThursdays = thursdays;\nexports.timeTuesday = tuesday;\nexports.timeTuesdays = tuesdays;\nexports.timeWednesday = wednesday;\nexports.timeWednesdays = wednesdays;\nexports.timeWeek = sunday;\nexports.timeWeeks = sundays;\nexports.timeYear = year;\nexports.timeYears = years;\nexports.timeout = timeout$1;\nexports.timer = timer;\nexports.timerFlush = timerFlush;\nexports.touch = touch;\nexports.touches = touches;\nexports.transition = transition;\nexports.transpose = transpose;\nexports.tree = tree;\nexports.treemap = index$3;\nexports.treemapBinary = binary;\nexports.treemapDice = treemapDice;\nexports.treemapResquarify = resquarify;\nexports.treemapSlice = treemapSlice;\nexports.treemapSliceDice = sliceDice;\nexports.treemapSquarify = squarify;\nexports.tsv = tsv$1;\nexports.tsvFormat = tsvFormat;\nexports.tsvFormatBody = tsvFormatBody;\nexports.tsvFormatRow = tsvFormatRow;\nexports.tsvFormatRows = tsvFormatRows;\nexports.tsvFormatValue = tsvFormatValue;\nexports.tsvParse = tsvParse;\nexports.tsvParseRows = tsvParseRows;\nexports.utcDay = utcDay;\nexports.utcDays = utcDays;\nexports.utcFriday = utcFriday;\nexports.utcFridays = utcFridays;\nexports.utcHour = utcHour;\nexports.utcHours = utcHours;\nexports.utcMillisecond = millisecond;\nexports.utcMilliseconds = milliseconds;\nexports.utcMinute = utcMinute;\nexports.utcMinutes = utcMinutes;\nexports.utcMonday = utcMonday;\nexports.utcMondays = utcMondays;\nexports.utcMonth = utcMonth;\nexports.utcMonths = utcMonths;\nexports.utcSaturday = utcSaturday;\nexports.utcSaturdays = utcSaturdays;\nexports.utcSecond = second;\nexports.utcSeconds = seconds;\nexports.utcSunday = utcSunday;\nexports.utcSundays = utcSundays;\nexports.utcThursday = utcThursday;\nexports.utcThursdays = utcThursdays;\nexports.utcTuesday = utcTuesday;\nexports.utcTuesdays = utcTuesdays;\nexports.utcWednesday = utcWednesday;\nexports.utcWednesdays = utcWednesdays;\nexports.utcWeek = utcSunday;\nexports.utcWeeks = utcSundays;\nexports.utcYear = utcYear;\nexports.utcYears = utcYears;\nexports.values = values;\nexports.variance = variance;\nexports.version = version;\nexports.voronoi = voronoi;\nexports.window = defaultView;\nexports.xml = xml;\nexports.zip = zip;\nexports.zoom = zoom;\nexports.zoomIdentity = identity$9;\nexports.zoomTransform = transform$1;\n\nObject.defineProperty(exports, '__esModule', { value: true });\n\n}));\n"
  },
  {
    "path": "extension/manifest.json",
    "content": "{\n    \"manifest_version\": 2,\n    \"name\": \"Recoil Dev Tools\",\n    \"version\": \"1.0.0.0\",\n    \"description\": \"A React Recoil Debugger\",\n  \n    \"permissions\": [\n      \"activeTab\",\n      \"<all_urls>\"\n    ],\n  \n    \"background\": {\n      \"scripts\": [\"background.js\"]\n    },\n\n    \"icons\": {\n      \"128\": \"icon.png\"\n    },\n\n  \n    \"web_accessible_resources\": [\"hook.js\"],\n  \n    \"devtools_page\": \"devtools-root.html\"\n  }"
  },
  {
    "path": "mock/snapshot.js",
    "content": "export const tree = [\n  {\n    children: [{\n      name: 'test Recoil Root',\n      children: [\n        {name: 'Body'},\n        {name: 'List', atoms: ['atom1', 'atom2']}\n      ]  \n    }], \n    name: 'test App'\n  },\n  {\n    atomVal: {atom1: 'testing123', atom2: 'testing098'}\n  },\n  {\n    name: 'Selector tree test',\n    children: [\n      {\n        name: 'selector1', children: [{name: 'atom1', value: 100}]\n      }, \n      {\n        name: 'selector2', children: [{name: 'atom2', value: 100}]\n      }\n    ]\n  }\n]"
  },
  {
    "path": "package.json",
    "content": "{\n  \"name\": \"recoil\",\n  \"version\": \"1.0.0\",\n  \"description\": \"\",\n  \"main\": \"index.js\",\n  \"scripts\": {\n    \"test\": \"jest --verbose\",\n    \"build\": \"webpack\",\n    \"dev\": \"webpack --mode=development --watch\"\n  },\n  \"author\": \"AKKZS\",\n  \"license\": \"ISC\",\n  \"devDependencies\": {\n    \"@babel/polyfill\": \"^7.10.4\",\n    \"@babel/preset-env\": \"^7.10.2\",\n    \"@babel/preset-react\": \"^7.10.1\",\n    \"babel-jest\": \"^26.2.2\",\n    \"copy-webpack-plugin\": \"^6.0.1\",\n    \"css-loader\": \"^3.5.3\",\n    \"jest\": \"^26.2.2\",\n    \"sass\": \"^1.26.7\",\n    \"sass-loader\": \"^8.0.2\",\n    \"ts-loader\": \"^7.0.5\",\n    \"typescript\": \"^3.9.7\",\n    \"webpack\": \"^4.43.0\",\n    \"webpack-cli\": \"^3.3.11\",\n    \"webpack-dev-server\": \"^3.11.0\",\n    \"webpack-extension-reloader\": \"^1.1.4\"\n  },\n  \"dependencies\": {\n    \"@babel/core\": \"^7.11.0\",\n    \"@babel/preset-typescript\": \"^7.10.4\",\n    \"@testing-library/jest-dom\": \"^5.11.2\",\n    \"@testing-library/react\": \"^10.4.7\",\n    \"babel-core\": \"^7.0.0-bridge.0\",\n    \"babel-loader\": \"^8.1.0\",\n    \"d3\": \"^5.16.0\",\n    \"lodash.throttle\": \"^4.1.1\",\n    \"pretty-print-json\": \"^0.2.1\",\n    \"react\": \"^16.13.1\",\n    \"react-dom\": \"^16.13.1\",\n    \"react-json-pretty\": \"^2.2.0\",\n    \"react-router-dom\": \"^5.2.0\",\n    \"react-test-renderer\": \"^16.13.1\"\n  }\n}\n"
  },
  {
    "path": "tsconfig.json",
    "content": "{\n  \"compilerOptions\": {\n    /* Visit https://aka.ms/tsconfig.json to read more about this file */\n\n    /* Basic Options */\n    // \"incremental\": true,                   /* Enable incremental compilation */\n    \"target\": \"ES2015\",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */\n    \"module\": \"commonjs\",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */\n    // \"lib\": [],                             /* Specify library files to be included in the compilation. */\n    // \"allowJs\": true,                       /* Allow javascript files to be compiled. */\n    // \"checkJs\": true,                       /* Report errors in .js files. */\n    // \"jsx\": \"preserve\",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */\n    // \"declaration\": true,                   /* Generates corresponding '.d.ts' file. */\n    // \"declarationMap\": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */\n    // \"sourceMap\": true,                     /* Generates corresponding '.map' file. */\n    // \"outFile\": \"./\",                       /* Concatenate and emit output to single file. */\n    // \"outDir\": \"./\",                        /* Redirect output structure to the directory. */\n    // \"rootDir\": \"./\",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */\n    // \"composite\": true,                     /* Enable project compilation */\n    // \"tsBuildInfoFile\": \"./\",               /* Specify file to store incremental compilation information */\n    // \"removeComments\": true,                /* Do not emit comments to output. */\n    // \"noEmit\": true,                        /* Do not emit outputs. */\n    // \"importHelpers\": true,                 /* Import emit helpers from 'tslib'. */\n    // \"downlevelIteration\": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */\n    // \"isolatedModules\": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */\n\n    /* Strict Type-Checking Options */\n    \"strict\": true,                           /* Enable all strict type-checking options. */\n    // \"noImplicitAny\": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */\n    // \"strictNullChecks\": true,              /* Enable strict null checks. */\n    // \"strictFunctionTypes\": true,           /* Enable strict checking of function types. */\n    // \"strictBindCallApply\": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */\n    // \"strictPropertyInitialization\": true,  /* Enable strict checking of property initialization in classes. */\n    // \"noImplicitThis\": true,                /* Raise error on 'this' expressions with an implied 'any' type. */\n    // \"alwaysStrict\": true,                  /* Parse in strict mode and emit \"use strict\" for each source file. */\n\n    /* Additional Checks */\n    // \"noUnusedLocals\": true,                /* Report errors on unused locals. */\n    // \"noUnusedParameters\": true,            /* Report errors on unused parameters. */\n    // \"noImplicitReturns\": true,             /* Report error when not all code paths in function return a value. */\n    // \"noFallthroughCasesInSwitch\": true,    /* Report errors for fallthrough cases in switch statement. */\n\n    /* Module Resolution Options */\n    // \"moduleResolution\": \"node\",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */\n    // \"baseUrl\": \"./\",                       /* Base directory to resolve non-absolute module names. */\n    // \"paths\": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */\n    // \"rootDirs\": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */\n    // \"typeRoots\": [],                       /* List of folders to include type definitions from. */\n    // \"types\": [],                           /* Type declaration files to be included in compilation. */\n    // \"allowSyntheticDefaultImports\": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */\n    \"esModuleInterop\": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */\n    // \"preserveSymlinks\": true,              /* Do not resolve the real path of symlinks. */\n    // \"allowUmdGlobalAccess\": true,          /* Allow accessing UMD globals from modules. */\n\n    /* Source Map Options */\n    // \"sourceRoot\": \"\",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */\n    // \"mapRoot\": \"\",                         /* Specify the location where debugger should locate map files instead of generated locations. */\n    // \"inlineSourceMap\": true,               /* Emit a single file with source maps instead of having a separate file. */\n    // \"inlineSources\": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */\n\n    /* Experimental Options */\n    // \"experimentalDecorators\": true,        /* Enables experimental support for ES7 decorators. */\n    // \"emitDecoratorMetadata\": true,         /* Enables experimental support for emitting type metadata for decorators. */\n\n    /* Advanced Options */\n    \"skipLibCheck\": true,                     /* Skip type checking of declaration files. */\n    \"forceConsistentCasingInFileNames\": true  /* Disallow inconsistently-cased references to the same file. */\n  }\n}\n"
  },
  {
    "path": "webpack.config.js",
    "content": "const path = require('path');\nconst CopyPlugin = require('copy-webpack-plugin');\nconst ExtensionReloader = require('webpack-extension-reloader');\n\nmodule.exports = {\n  // Files to bundle\n  entry: {\n    bundle: './extension/frontend/view/view.js',\n    // \"create-panel\": './extension/devtools/create-panel.js'\n    background: './extension/backend/background.js',\n    hook: './extension/backend/hook.ts',\n  },\n  // Location to bundle them to\n  output: {\n    filename: '[name].js',\n    path: path.resolve(__dirname, 'build/extension'),\n  },\n  // Modules to load non-jacvascript files\n  module: {\n    rules: [\n      // CSS Loader\n      {\n        test: /\\.css$/i,\n        use: ['style-loader', 'css-loader'],\n      },\n      // SASS Loader\n      {\n        test: /\\.s[ac]ss$/i,\n        use: [\n          // Creates `style` nodes from JS strings\n          'style-loader',\n          // Translates CSS into CommonJS\n          'css-loader',\n          // Compiles Sass to CSS\n          'sass-loader',\n        ],\n      },\n      {\n        rules: [\n          {\n            test: /\\.tsx?$/,\n            use: 'ts-loader',\n            exclude: /node_modules/,\n          },\n        ],\n      },\n      {\n        test: /\\.jsx?/,\n        exclude: /(node_modules)/,\n        resolve: {\n          extensions: ['.js', '.jsx'],\n        },\n        use: {\n          loader: 'babel-loader',\n          options: {\n            presets: ['@babel/preset-env', '@babel/preset-react'],\n          },\n        },\n      },\n    ],\n  },\n\n  plugins: [\n    // Copies files to 'build' folder without bundling them\n    new CopyPlugin({\n      patterns: [\n        { from: 'extension/manifest.json', to: '../extension/manifest.json' },\n        {\n          from: 'extension/backend/background.js',\n          to: '../extension/background.js',\n        },\n        {\n          from: 'extension/frontend/devtools-root.html',\n          to: '../extension/devtools-root.html',\n        },\n        {\n          from: 'extension/frontend/create-panel.js',\n          to: '../extension/create-panel.js',\n        },\n        {\n          from: 'extension/frontend/view/view.html',\n          to: '../extension/view.html',\n        },\n        {\n          from: 'extension/frontend/view/style.css',\n          to: '../extension/style.css',\n        },\n        // { from: 'extension/backend/hook.js', to: '../extension/hook.js' },\n        {\n          from: 'extension/backend/content_script.js',\n          to: '../extension/content_script.js',\n        },\n        {\n          from: 'extension/icon.png',\n          to: '../extension/icon.png',\n        }\n      ],\n    }),\n    // Enables hot reloading - use npm run dev command\n    new ExtensionReloader({\n      manifest: path.resolve(__dirname, './extension/manifest.json'),\n      entries: {\n        bundle: 'bundle',\n        background: '`background',\n      },\n    }),\n  ],\n\n  optimization: {\n    minimize: false,\n  },\n\n  devtool: 'cheap-module-source-map', // Needed as to stop Chrome eval errors when using dev server\n};\n"
  }
]