苏州房价网格Grid热度(Mapv实现)echarts 配置项内容和展示

采用百度Mapv 整合，缩放显示均价！

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                "elementType": "all",
                "stylers": {
                    "lightness": 47,
                    "saturation": -100
                }
            }, {
                "featureType": "highway",
                "elementType": "geometry.fill",
                "stylers": {
                    "color": "#ffffff"
                }
            }, {
                "featureType": "poi",
                "elementType": "labels.icon",
                "stylers": {
                    "visibility": "off"
                }
            }, {
                "featureType": "road",
                "elementType": "labels",
                "stylers": {
                    "visibility": "off"
                }
            }]
        }
    }

}

myChart.setOption(option);
setTimeout(init, 0)


function init() {
    initMap();
    initMapv();
}

function getMap() {
    return myChart.getModel().getComponent('bmap').getBMap();
}

function initMap() {
    var top_left_navigation = new BMap.NavigationControl({
        type: BMAP_NAVIGATION_CONTROL_SMALL
    });
    var map = getMap();

    //map.centerAndZoom("苏州", 13);
    map.addControl(top_left_navigation);
    map.disableDoubleClickZoom();
    return map;
}



function initMapv() {

    var map = getMap();




    var data = [];



    var randomCount = points.length;

    // 构造数据
    while (randomCount--) {
        var cityCenter = points[randomCount];
        data.push({
            geometry: {
                type: 'Point',
                coordinates: [cityCenter[0], cityCenter[1]]
            },
            count: cityCenter[2]
        });
    }


    var dataSet = new mapv.DataSet(data);
    //console.log(dataSet)


    var options = {
        fillStyle: '#99C1DB',
        strokeStyle: 'white', // 描边颜色
        lineWidth: 1,
        //shadowColor: 'white',
        //shadowBlur: 1,
        size: 60,
        globalAlpha: 1,
        gradient: {
    		0.4: "rgba(64, 134, 181,0.4)",
    		0.6: "rgba(64, 134, 181,0.6)",
    		0.8: "rgba(64, 134, 181,0.8)",
    		1.0: "rgba(64, 134, 181,1)"
        },
        label: {
            show: true,
            fillStyle: 'white',
            average: true
                //shadowColor: 'black',
                // font: '20px Arial',
                //shadowBlur: 10,
        },
        max: 30000,

        draw: 'grid',
        methods: { // 一些事件回调函数
            click: function(item) { // 点击事件，返回对应点击元素的对象值
                console.log(item);
            }
        }
    }


    var mapvLayer = new mapv.baiduMapLayer(map, dataSet, options);

    var options = {
        fillStyle: 'rgba(55, 50, 250, 0.8)',
        shadowColor: 'rgba(55, 50, 250, 1)',
        shadowBlur: 20,
        size: 3,
        draw: 'simple'
    }
}

//---------------------------------------------



































































var mapv = {};
(function(global, factory) {
    // console.log(global,factory)
    // typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
    //     typeof define === 'function' && define.amd ? define(['exports'], factory) :
    //     (factory((global.mapv = global.mapv || {})));
    factory(mapv)
}(window, (function(exports) {
    'use strict';

    var version = "2.0.13";

    /**
     * @author kyle / http://nikai.us/
     */

    var clear = function(context) {
        context && context.clearRect && context.clearRect(0, 0, context.canvas.width, context.canvas.height);
        //context.canvas.width = context.canvas.width;
        //context.canvas.height = context.canvas.height;
    };

    /**
     * @author kyle / http://nikai.us/
     */

    var resolutionScale$1 = function(context) {
        var devicePixelRatio = window.devicePixelRatio;
        context.canvas.width = context.canvas.width * devicePixelRatio;
        context.canvas.height = context.canvas.height * devicePixelRatio;
        context.canvas.style.width = context.canvas.width / devicePixelRatio + 'px';
        context.canvas.style.height = context.canvas.height / devicePixelRatio + 'px';
        context.scale(devicePixelRatio, devicePixelRatio);
    };

    function Event() {
        this._subscribers = {}; // event subscribers
    }

    /**
     * Subscribe to an event, add an event listener
     * @param {String} event        Event name. Available events: 'put', 'update',
     *                              'remove'
     * @param {function} callback   Callback method. Called with three parameters:
     *                                  {String} event
     *                                  {Object | null} params
     *                                  {String | Number} senderId
     */
    Event.prototype.on = function(event, callback) {
        var subscribers = this._subscribers[event];
        if (!subscribers) {
            subscribers = [];
            this._subscribers[event] = subscribers;
        }

        subscribers.push({
            callback: callback
        });
    };

    /**
     * Unsubscribe from an event, remove an event listener
     * @param {String} event
     * @param {function} callback
     */
    Event.prototype.off = function(event, callback) {
        var subscribers = this._subscribers[event];
        if (subscribers) {
            //this._subscribers[event] = subscribers.filter(listener => listener.callback != callback);
            for (var i = 0; i < subscribers.length; i++) {
                if (subscribers[i].callback == callback) {
                    subscribers.splice(i, 1);
                    i--;
                }
            }
        }
    };

    /**
     * Trigger an event
     * @param {String} event
     * @param {Object | null} params
     * @param {String} [senderId]       Optional id of the sender.
     * @private
     */
    Event.prototype._trigger = function(event, params, senderId) {
        if (event == '*') {
            throw new Error('Cannot trigger event *');
        }

        var subscribers = [];
        if (event in this._subscribers) {
            subscribers = subscribers.concat(this._subscribers[event]);
        }
        if ('*' in this._subscribers) {
            subscribers = subscribers.concat(this._subscribers['*']);
        }

        for (var i = 0, len = subscribers.length; i < len; i++) {
            var subscriber = subscribers[i];
            if (subscriber.callback) {
                subscriber.callback(event, params, senderId || null);
            }
        }
    };

    var classCallCheck = function(instance, Constructor) {
        if (!(instance instanceof Constructor)) {
            throw new TypeError("Cannot call a class as a function");
        }
    };

    var createClass = function() {
        function defineProperties(target, props) {
            for (var i = 0; i < props.length; i++) {
                var descriptor = props[i];
                descriptor.enumerable = descriptor.enumerable || false;
                descriptor.configurable = true;
                if ("value" in descriptor) descriptor.writable = true;
                Object.defineProperty(target, descriptor.key, descriptor);
            }
        }

        return function(Constructor, protoProps, staticProps) {
            if (protoProps) defineProperties(Constructor.prototype, protoProps);
            if (staticProps) defineProperties(Constructor, staticProps);
            return Constructor;
        };
    }();







    var get = function get(object, property, receiver) {
        if (object === null) object = Function.prototype;
        var desc = Object.getOwnPropertyDescriptor(object, property);

        if (desc === undefined) {
            var parent = Object.getPrototypeOf(object);

            if (parent === null) {
                return undefined;
            } else {
                return get(parent, property, receiver);
            }
        } else if ("value" in desc) {
            return desc.value;
        } else {
            var getter = desc.get;

            if (getter === undefined) {
                return undefined;
            }

            return getter.call(receiver);
        }
    };

    var inherits = function(subClass, superClass) {
        if (typeof superClass !== "function" && superClass !== null) {
            throw new TypeError("Super expression must either be null or a function, not " + typeof superClass);
        }

        subClass.prototype = Object.create(superClass && superClass.prototype, {
            constructor: {
                value: subClass,
                enumerable: false,
                writable: true,
                configurable: true
            }
        });
        if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
    };











    var possibleConstructorReturn = function(self, call) {
        if (!self) {
            throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
        }

        return call && (typeof call === "object" || typeof call === "function") ? call : self;
    };

    /**
     * @author kyle / http://nikai.us/
     */

    /**
     * DataSet
     *
     * A data set can:
     * - add/remove/update data
     * - gives triggers upon changes in the data
     * - can  import/export data in various data formats
     * @param {Array} [data]    Optional array with initial data
     * the field geometry is like geojson, it can be:
     * {
     *     "type": "Point",
     *     "coordinates": [125.6, 10.1]
     * }
     * {
     *     "type": "LineString",
     *     "coordinates": [
     *         [102.0, 0.0], [103.0, 1.0], [104.0, 0.0], [105.0, 1.0]
     *     ]
     * }
     * {
     *     "type": "Polygon",
     *     "coordinates": [
     *         [ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0],
     *           [100.0, 1.0], [100.0, 0.0] ]
     *     ]
     * }
     * @param {Object} [options]   Available options:
     * 
     */
    function DataSet(data, options) {

        this._options = options || {};
        this._data = []; // map with data indexed by id

        // add initial data when provided
        if (data) {
            this.add(data);
        }
    }

    DataSet.prototype = new Event();

    /**
     * Add data.
     */
    DataSet.prototype.add = function(data, senderId) {
        if (Array.isArray(data)) {
            // Array
            for (var i = 0, len = data.length; i < len; i++) {
                if (data[i].time && data[i].time.length == 14 && data[i].time.substr(0, 2) == '20') {
                    var time = data[i].time;
                    data[i].time = new Date(time.substr(0, 4) + '-' + time.substr(4, 2) + '-' + time.substr(6, 2) + ' ' + time.substr(8, 2) + ':' + time.substr(10, 2) + ':' + time.substr(12, 2)).getTime();
                }
                this._data.push(data[i]);
            }
        } else if (data instanceof Object) {
            // Single item
            this._data.push(data);
        } else {
            throw new Error('Unknown dataType');
        }
    };

    /**
     * get data.
     */
    DataSet.prototype.get = function(args) {
        args = args || {};

        //console.time('copy data time')
        var start = new Date();
        // TODO: 不修改原始数据，在数据上挂载新的名称，每次修改数据直接修改新名称下的数据，可以省去deepCopy
        // var data = deepCopy(this._data);
        var data = this._data;

        // console.timeEnd('copy data time')

        // console.time('transferCoordinate time')

        var start = new Date();

        if (args.filter) {
            var newData = [];
            for (var i = 0; i < data.length; i++) {
                if (args.filter(data[i])) {
                    newData.push(data[i]);
                }
            }
            data = newData;
        }

        if (args.transferCoordinate) {
            data = this.transferCoordinate(data, args.transferCoordinate, args.fromColumn, args.toColumn);
        }

        // console.timeEnd('transferCoordinate time')

        return data;
    };

    /**
     * set data.
     */
    DataSet.prototype.set = function(data) {
        this._set(data);
        this._trigger('change');
    };

    /**
     * set data.
     */
    DataSet.prototype._set = function(data) {
        this.clear();
        this.add(data);
    };

    /**
     * clear data.
     */
    DataSet.prototype.clear = function(args) {
        this._data = []; // map with data indexed by id
    };

    /**
     * remove data.
     */
    DataSet.prototype.remove = function(args) {};

    /**
     * update data.
     */
    DataSet.prototype.update = function(args) {};

    /**
     * transfer coordinate.
     */
    DataSet.prototype.transferCoordinate = function(data, transferFn, fromColumn, toColumnName) {

        toColumnName = toColumnName || '_coordinates';
        fromColumn = fromColumn || 'coordinates';

        for (var i = 0; i < data.length; i++) {

            var geometry = data[i].geometry;
            var coordinates = geometry[fromColumn];
            switch (geometry.type) {
                case 'Point':
                    geometry[toColumnName] = transferFn(coordinates);
                    break;
                case 'LineString':
                    var newCoordinates = [];
                    for (var j = 0; j < coordinates.length; j++) {
                        newCoordinates.push(transferFn(coordinates[j]));
                    }
                    geometry[toColumnName] = newCoordinates;
                    break;
                case 'Polygon':
                    var newCoordinates = getPolygon(coordinates);
                    geometry[toColumnName] = newCoordinates;
                    break;
                case 'MultiPolygon':
                    var newCoordinates = [];
                    for (var c = 0; c < coordinates.length; c++) {
                        var polygon = coordinates[c];
                        var polygon = getPolygon(polygon);
                        newCoordinates.push(polygon);
                    }

                    geometry[toColumnName] = newCoordinates;
                    break;
            }
        }

        function getPolygon(coordinates) {
            var newCoordinates = [];
            for (var c = 0; c < coordinates.length; c++) {
                var coordinate = coordinates[c];
                var newcoordinate = [];
                for (var j = 0; j < coordinate.length; j++) {
                    newcoordinate.push(transferFn(coordinate[j]));
                }
                newCoordinates.push(newcoordinate);
            }
            return newCoordinates;
        }

        return data;
    };

    DataSet.prototype.initGeometry = function(transferFn) {

        if (transferFn) {

            this._data.forEach(function(item) {
                item.geometry = transferFn(item);
            });
        } else {

            this._data.forEach(function(item) {
                if (!item.geometry && item.lng && item.lat) {
                    item.geometry = {
                        type: 'Point',
                        coordinates: [item.lng, item.lat]
                    };
                }
            });
        }
    };

    /**
     * 获取当前列的最大值
     */
    DataSet.prototype.getMax = function(columnName) {
        var data = this._data;

        if (!data || data.length <= 0) {
            return;
        }

        var max = parseFloat(data[0][columnName]);

        for (var i = 1; i < data.length; i++) {
            var value = parseFloat(data[i][columnName]);
            if (value > max) {
                max = value;
            }
        }

        return max;
    };

    /**
     * 获取当前列的总和
     */
    DataSet.prototype.getSum = function(columnName) {
        var data = this._data;

        if (!data || data.length <= 0) {
            return;
        }

        var sum = 0;

        for (var i = 0; i < data.length; i++) {
            if (data[i][columnName]) {
                sum += parseFloat(data[i][columnName]);
            }
        }

        return sum;
    };

    /**
     * 获取当前列的最小值
     */
    DataSet.prototype.getMin = function(columnName) {
        var data = this._data;

        if (!data || data.length <= 0) {
            return;
        }

        var min = parseFloat(data[0][columnName]);

        for (var i = 1; i < data.length; i++) {
            var value = parseFloat(data[i][columnName]);
            if (value < min) {
                min = value;
            }
        }

        return min;
    };

    /**
     * @author kyle / http://nikai.us/
     */

    var pathSimple = {
        drawDataSet: function drawDataSet(context, dataSet, options) {

            var data = dataSet instanceof DataSet ? dataSet.get() : dataSet;

            for (var i = 0, len = data.length; i < len; i++) {
                var item = data[i];
                this.draw(context, item, options);
            }
        },
        draw: function draw(context, data, options) {
            var type = data.geometry.type;
            var coordinates = data.geometry._coordinates || data.geometry.coordinates;
            var symbol = options.symbol || 'circle';
            switch (type) {
                case 'Point':
                    var size = data._size || data.size || options._size || options.size || 5;
                    if (options.symbol === 'rect') {
                        context.rect(coordinates[0] - size / 2, coordinates[1] - size / 2, size, size);
                    } else {
                        if (options.bigData === 'Point') {
                            context.moveTo(coordinates[0], coordinates[1]);
                        }
                        context.arc(coordinates[0], coordinates[1], size, 0, Math.PI * 2);
                    }
                    break;
                case 'LineString':
                    for (var j = 0; j < coordinates.length; j++) {
                        var x = coordinates[j][0];
                        var y = coordinates[j][1];
                        if (j == 0) {
                            context.moveTo(x, y);
                        } else {
                            context.lineTo(x, y);
                        }
                    }
                    break;
                case 'Polygon':
                    this.drawPolygon(context, coordinates);
                    break;
                case 'MultiPolygon':
                    for (var i = 0; i < coordinates.length; i++) {
                        var polygon = coordinates[i];
                        this.drawPolygon(context, polygon);
                    }
                    context.closePath();
                    break;
                default:
                    console.log('type' + type + 'is not support now!');
                    break;
            }
        },

        drawPolygon: function drawPolygon(context, coordinates) {

            for (var i = 0; i < coordinates.length; i++) {

                var coordinate = coordinates[i];

                context.moveTo(coordinate[0][0], coordinate[0][1]);
                for (var j = 1; j < coordinate.length; j++) {
                    context.lineTo(coordinate[j][0], coordinate[j][1]);
                }
                context.lineTo(coordinate[0][0], coordinate[0][1]);
            }
        }

    };

    /**
     * @author kyle / http://nikai.us/
     */

    var drawSimple = {
        draw: function draw(context, dataSet, options) {

            var data = dataSet instanceof DataSet ? dataSet.get() : dataSet;

            // console.log('xxxx',options)
            context.save();

            for (var key in options) {
                context[key] = options[key];
            }

            // console.log(data);
            if (options.bigData) {
                context.save();
                context.beginPath();

                for (var i = 0, len = data.length; i < len; i++) {

                    var item = data[i];

                    pathSimple.draw(context, item, options);
                }

                var type = options.bigData;

                if (type == 'Point' || type == 'Polygon' || type == 'MultiPolygon') {

                    context.fill();

                    if ((item.strokeStyle || options.strokeStyle) && options.lineWidth) {
                        context.stroke();
                    }
                } else if (type == 'LineString') {
                    context.stroke();
                }

                context.restore();
            } else {
                for (var i = 0, len = data.length; i < len; i++) {

                    var item = data[i];

                    context.save();

                    if (item.fillStyle) {
                        context.fillStyle = item.fillStyle;
                    }

                    if (item.strokeStyle) {
                        context.strokeStyle = item.strokeStyle;
                    }

                    var type = item.geometry.type;

                    context.beginPath();

                    pathSimple.draw(context, item, options);

                    if (type == 'Point' || type == 'Polygon' || type == 'MultiPolygon') {

                        context.fill();

                        if ((item.strokeStyle || options.strokeStyle) && options.lineWidth) {
                            context.stroke();
                        }
                    } else if (type == 'LineString') {
                        context.stroke();
                    }

                    context.restore();
                }
            }

            context.restore();
        }
    };

    function Canvas(width, height) {

        var canvas;

        if (typeof document === 'undefined') {

            var Canvas = require('canvas');
            canvas = new Canvas(width, height);
        } else {

            var canvas = document.createElement('canvas');

            if (width) {
                canvas.width = width;
            }

            if (height) {
                canvas.height = height;
            }
        }

        return canvas;
    }

    /**
     * @author kyle / http://nikai.us/
     */

    /**
     * Category
     * @param {Object} [options]   Available options:
     *                             {Object} gradient: { 0.25: "rgb(0,0,255)", 0.55: "rgb(0,255,0)", 0.85: "yellow", 1.0: "rgb(255,0,0)"}
     */
    function Intensity(options) {

        options = options || {};
        this.gradient = options.gradient || {
            0.25: "rgba(0, 0, 255, 1)",
            0.55: "rgba(0, 255, 0, 1)",
            0.85: "rgba(255, 255, 0, 1)",
            1.0: "rgba(255, 0, 0, 1)"
        };
        this.maxSize = options.maxSize || 35;
        this.minSize = options.minSize || 0;
        this.max = options.max || 100;
        this.min = options.min || 0;
        this.initPalette();
    }

    Intensity.prototype.setMax = function(value) {
        this.max = value || 100;
    };

    Intensity.prototype.setMin = function(value) {
        this.min = value || 0;
    };

    Intensity.prototype.setMaxSize = function(maxSize) {
        this.maxSize = maxSize || 35;
    };

    Intensity.prototype.setMinSize = function(minSize) {
        this.minSize = minSize || 0;
    };

    Intensity.prototype.initPalette = function() {

        var gradient = this.gradient;

        var canvas = new Canvas(256, 1);

        var paletteCtx = this.paletteCtx = canvas.getContext('2d');

        var lineGradient = paletteCtx.createLinearGradient(0, 0, 256, 1);

        for (var key in gradient) {
            lineGradient.addColorStop(parseFloat(key), gradient[key]);
        }

        paletteCtx.fillStyle = lineGradient;
        paletteCtx.fillRect(0, 0, 256, 1);
    };

    Intensity.prototype.getColor = function(value) {

        var imageData = this.getImageData(value);

        return "rgba(" + imageData[0] + ", " + imageData[1] + ", " + imageData[2] + ", " + imageData[3] / 256 + ")";
    };

    Intensity.prototype.getImageData = function(value) {

        var imageData = this.paletteCtx.getImageData(0, 0, 256, 1).data;

        if (value === undefined) {
            return imageData;
        }

        var max = this.max;
        var min = this.min;

        if (value > max) {
            value = max;
        }

        if (value < min) {
            value = min;
        }

        var index = Math.floor((value - min) / (max - min) * (256 - 1)) * 4;

        return [imageData[index], imageData[index + 1], imageData[index + 2], imageData[index + 3]];
    };

    /**
     * @param Number value 
     * @param Number max of value
     * @param Number max of size
     * @param Object other options
     */
    Intensity.prototype.getSize = function(value) {

        var size = 0;
        var max = this.max;
        var min = this.min;
        var maxSize = this.maxSize;
        var minSize = this.minSize;

        if (value > max) {
            value = max;
        }

        if (value < min) {
            value = min;
        }

        size = minSize + (value - min) / (max - min) * (maxSize - minSize);

        return size;
    };

    Intensity.prototype.getLegend = function(options) {
        var gradient = this.gradient;

        var width = options.width || 20;
        var height = options.height || 180;

        var canvas = new Canvas(width, height);

        var paletteCtx = canvas.getContext('2d');

        var lineGradient = paletteCtx.createLinearGradient(0, height, 0, 0);

        for (var key in gradient) {
            lineGradient.addColorStop(parseFloat(key), gradient[key]);
        }

        paletteCtx.fillStyle = lineGradient;
        paletteCtx.fillRect(0, 0, width, height);

        return canvas;
    };

    var global$1 = typeof window === 'undefined' ? {} : window;

    var devicePixelRatio = global$1.devicePixelRatio;

    /**
     * @author kyle / http://nikai.us/
     */

    function createCircle(size) {

        var shadowBlur = size / 2;
        var r2 = size + shadowBlur;
        var offsetDistance = 10000;

        var circle = new Canvas(r2 * 2, r2 * 2);
        var context = circle.getContext('2d');

        context.shadowBlur = shadowBlur;
        context.shadowColor = 'black';
        context.shadowOffsetX = context.shadowOffsetY = offsetDistance;

        context.beginPath();
        context.arc(r2 - offsetDistance, r2 - offsetDistance, size, 0, Math.PI * 2, true);
        context.closePath();
        context.fill();
        return circle;
    }

    function colorize(pixels, gradient, options) {

        var maxOpacity = options.maxOpacity || 0.8;
        for (var i = 3, len = pixels.length, j; i < len; i += 4) {
            j = pixels[i] * 4; // get gradient color from opacity value

            if (pixels[i] / 256 > maxOpacity) {
                pixels[i] = 256 * maxOpacity;
            }

            pixels[i - 3] = gradient[j];
            pixels[i - 2] = gradient[j + 1];
            pixels[i - 1] = gradient[j + 2];
        }
    }

    function drawGray(context, dataSet, options) {

        var max = options.max || 100;
        var min = options.min || 0;
        // console.log(max)
        var size = options._size;
        if (size == undefined) {
            size = options.size;
            if (size == undefined) {
                size = 13;
            }
        }

        var intensity = new Intensity({
            gradient: options.gradient,
            max: max,
            min: min
        });

        var circle = createCircle(size);
        var circleHalfWidth = circle.width / 2;
        var circleHalfHeight = circle.height / 2;

        var data = dataSet;

        var dataOrderByAlpha = {};

        data.forEach(function(item, index) {
            var count = item.count === undefined ? 1 : item.count;
            var alpha = Math.min(1, count / max).toFixed(2);
            dataOrderByAlpha[alpha] = dataOrderByAlpha[alpha] || [];
            dataOrderByAlpha[alpha].push(item);
        });

        for (var i in dataOrderByAlpha) {
            if (isNaN(i)) continue;
            var _data = dataOrderByAlpha[i];
            context.beginPath();
            if (!options.withoutAlpha) {
                context.globalAlpha = i;
            }
            context.strokeStyle = intensity.getColor(i * max);
            _data.forEach(function(item, index) {
                if (!item.geometry) {
                    return;
                }

                var coordinates = item.geometry._coordinates || item.geometry.coordinates;
                var type = item.geometry.type;
                if (type === 'Point') {
                    var count = item.count === undefined ? 1 : item.count;
                    context.globalAlpha = count / max;
                    context.drawImage(circle, coordinates[0] - circleHalfWidth, coordinates[1] - circleHalfHeight);
                } else if (type === 'LineString') {
                    var count = item.count === undefined ? 1 : item.count;
                    context.globalAlpha = count / max;
                    context.beginPath();
                    pathSimple.draw(context, item, options);
                    context.stroke();
                } else if (type === 'Polygon') {}
            });
        }
    }

    function draw(context, dataSet, options) {
        var strength = options.strength || 0.3;
        context.strokeStyle = 'rgba(0,0,0,' + strength + ')';
        var shadowCanvas = new Canvas(context.canvas.width, context.canvas.height);
        var shadowContext = shadowCanvas.getContext('2d');
        shadowContext.scale(devicePixelRatio, devicePixelRatio);

        options = options || {};

        var data = dataSet instanceof DataSet ? dataSet.get() : dataSet;

        context.save();

        var intensity = new Intensity({
            gradient: options.gradient
        });

        //console.time('drawGray')
        drawGray(shadowContext, data, options);

        //console.timeEnd('drawGray');
        // return false;
        if (!options.absolute) {
            //console.time('changeColor');
            var colored = shadowContext.getImageData(0, 0, context.canvas.width, context.canvas.height);
            colorize(colored.data, intensity.getImageData(), options);
            //console.timeEnd('changeColor');
            context.putImageData(colored, 0, 0);

            context.restore();
        }

        intensity = null;
        shadowCanvas = null;
    }

    var drawHeatmap = {
        draw: draw
    };

    /**
     * @author kyle / http://nikai.us/
     */

    var drawGrid = {
        draw: function draw(context, dataSet, options) {

            context.save();

            var data = dataSet instanceof DataSet ? dataSet.get() : dataSet;

            var grids = {};
            var gridIndexData = {};
            var size = options._size || options.size || 50;

            var offset = options.offset || {
                x: 0,
                y: 0
            };

            for (var i = 0; i < data.length; i++) {
                var coordinates = data[i].geometry._coordinates || data[i].geometry.coordinates;
                var gridKey = Math.floor((coordinates[0] - offset.x) / size) + "," + Math.floor((coordinates[1] - offset.y) / size);

                if (!grids[gridKey]) {
                    grids[gridKey] = 0;
                    gridIndexData[gridKey] = []
                }
                var count = ~~(data[i].count || 1)
                grids[gridKey] += count;
                gridIndexData[gridKey].push(data[i]);
            }

            for (var gridKey in grids) {
                var total = grids[gridKey]
                gridIndexData[gridKey].forEach((i) => {
                    i.total = total;
                    i.average = parseInt(total / gridIndexData[gridKey].length)
                })
            }


            var intensity = new Intensity({
                max: options.max || 100,
                gradient: options.gradient
            });

            for (var gridKey in grids) {
                gridKey = gridKey.split(",");

                context.beginPath();
                context.rect(gridKey[0] * size + .5 + offset.x, gridKey[1] * size + .5 + offset.y, size, size);
                var text = grids[gridKey];
                if (options.label.average) {
                    text = parseInt(grids[gridKey] / gridIndexData[gridKey].length)
                }
                
                context.fillStyle = intensity.getColor(text);
                context.fill();
                if (options.strokeStyle && options.lineWidth) {
                    context.stroke();
                }
            }

            if (options.label && options.label.show !== false) {

                context.fillStyle = options.label.fillStyle || 'white';

                if (options.label.font) {
                    context.font = options.label.font;
                }

                if (options.label.shadowColor) {
                    context.shadowColor = options.label.shadowColor;
                }

                if (options.label.shadowBlur) {
                    context.shadowBlur = options.label.shadowBlur;
                }

                for (var gridKey in grids) {
                    gridKey = gridKey.split(",");
                    var text = grids[gridKey];
                    if (options.label.average) {
                        text = parseInt(text / gridIndexData[gridKey].length)
                    }

                    var textWidth = context.measureText(text).width;
                    context.fillText(text, gridKey[0] * size + .5 + offset.x + size / 2 - textWidth / 2, gridKey[1] * size + .5 + offset.y + size / 2 + 5);
                }
            }

            context.restore();
        }
    };

    /**
     * @author kyle / http://nikai.us/
     */

    function hex_corner(center, size, i) {
        var angle_deg = 60 * i + 30;
        var angle_rad = Math.PI / 180 * angle_deg;
        return [center.x + size * Math.cos(angle_rad), center.y + size * Math.sin(angle_rad)];
    }

    var drawHoneycomb = {
        draw: function draw(context, dataSet, options) {

            context.save();

            var data = dataSet instanceof DataSet ? dataSet.get() : dataSet;

            for (var key in options) {
                context[key] = options[key];
            }

            var grids = {};

            var offset = options.offset || {
                x: 10,
                y: 10
            };

            //
            var r = options._size || options.size || 40;
            r = r / 2 / Math.sin(Math.PI / 3);
            var dx = r * 2 * Math.sin(Math.PI / 3);
            var dy = r * 1.5;

            var binsById = {};

            for (var i = 0; i < data.length; i++) {
                var coordinates = data[i].geometry._coordinates || data[i].geometry.coordinates;
                var py = (coordinates[1] - offset.y) / dy,
                    pj = Math.round(py),
                    px = (coordinates[0] - offset.x) / dx - (pj & 1 ? .5 : 0),
                    pi = Math.round(px),
                    py1 = py - pj;

                if (Math.abs(py1) * 3 > 1) {
                    var px1 = px - pi,
                        pi2 = pi + (px < pi ? -1 : 1) / 2,
                        pj2 = pj + (py < pj ? -1 : 1),
                        px2 = px - pi2,
                        py2 = py - pj2;
                    if (px1 * px1 + py1 * py1 > px2 * px2 + py2 * py2) pi = pi2 + (pj & 1 ? 1 : -1) / 2, pj = pj2;
                }

                var id = pi + "-" + pj,
                    bin = binsById[id];
                if (bin) {
                    bin.push(data[i]);
                } else {
                    bin = binsById[id] = [data[i]];
                    bin.i = pi;
                    bin.j = pj;
                    bin.x = (pi + (pj & 1 ? 1 / 2 : 0)) * dx;
                    bin.y = pj * dy;
                }
            }

            var intensity = new Intensity({
                max: options.max || 100,
                maxSize: r,
                gradient: options.gradient
            });

            for (var key in binsById) {

                var item = binsById[key];

                context.beginPath();

                for (var j = 0; j < 6; j++) {

                    var radius = r;

                    var result = hex_corner({
                        x: item.x + offset.x,
                        y: item.y + offset.y
                    }, radius, j);
                    context.lineTo(result[0], result[1]);
                }
                context.closePath();

                var count = 0;
                for (var i = 0; i < item.length; i++) {
                    count += item[i].count || 1;
                }
                item.count = count;

                context.fillStyle = intensity.getColor(count);
                context.fill();
                if (options.strokeStyle && options.lineWidth) {
                    context.stroke();
                }
            }

            if (options.label && options.label.show !== false) {

                context.fillStyle = options.label.fillStyle || 'white';

                if (options.label.font) {
                    context.font = options.label.font;
                }

                if (options.label.shadowColor) {
                    context.shadowColor = options.label.shadowColor;
                }

                if (options.label.shadowBlur) {
                    context.shadowBlur = options.label.shadowBlur;
                }

                for (var key in binsById) {
                    var item = binsById[key];
                    var text = item.count;
                    if (text < 0) {
                        text = text.toFixed(2);
                    } else {
                        text = ~~text;
                    }
                    var textWidth = context.measureText(text).width;
                    context.fillText(text, item.x + offset.x - textWidth / 2, item.y + offset.y + 5);
                }
            }

            context.restore();
        }
    };

    function createShader(gl, src, type) {
        var shader = gl.createShader(type);
        gl.shaderSource(shader, src);
        gl.compileShader(shader);
        return shader;
    }

    function initShaders(gl, vs_source, fs_source) {

        var vertexShader = createShader(gl, vs_source, gl.VERTEX_SHADER);
        var fragmentShader = createShader(gl, fs_source, gl.FRAGMENT_SHADER);

        var glProgram = gl.createProgram();

        gl.attachShader(glProgram, vertexShader);
        gl.attachShader(glProgram, fragmentShader);
        gl.linkProgram(glProgram);

        gl.useProgram(glProgram);

        return glProgram;
    }

    function getColorData(color) {
        var tmpCanvas = document.createElement('canvas');
        var tmpCtx = tmpCanvas.getContext('2d');
        tmpCanvas.width = 1;
        tmpCanvas.height = 1;
        tmpCtx.fillStyle = color;
        tmpCtx.fillRect(0, 0, 1, 1);
        return tmpCtx.getImageData(0, 0, 1, 1).data;
    }

    var vs_s = ['attribute vec4 a_Position;', 'void main() {', 'gl_Position = a_Position;', 'gl_PointSize = 30.0;', '}'].join('');

    var fs_s = ['precision mediump float;', 'uniform vec4 u_FragColor;', 'void main() {', 'gl_FragColor = u_FragColor;', '}'].join('');

    function draw$1(gl, data, options) {

        if (!data) {
            return;
        }

        var program = initShaders(gl, vs_s, fs_s);

        gl.enable(gl.BLEND);
        gl.blendFunc(gl.SRC_ALPHA, gl.ONE);

        //gl.clearColor(0.0, 0.0, 1.0, 1.0);
        gl.clear(gl.COLOR_BUFFER_BIT);

        var halfCanvasWidth = gl.canvas.width / 2;
        var halfCanvasHeight = gl.canvas.height / 2;

        // Create a buffer object
        var vertexBuffer = gl.createBuffer();
        // Bind the buffer object to target
        gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);

        var a_Position = gl.getAttribLocation(program, 'a_Position');
        // Assign the buffer object to a_Position variable
        gl.vertexAttribPointer(a_Position, 2, gl.FLOAT, false, 0, 0);

        // Enable the assignment to a_Position variable
        gl.enableVertexAttribArray(a_Position);

        var uFragColor = gl.getUniformLocation(program, 'u_FragColor');

        var colored = getColorData(options.strokeStyle || 'red');

        gl.uniform4f(uFragColor, colored[0] / 255, colored[1] / 255, colored[2] / 255, colored[3] / 255);

        gl.lineWidth(options.lineWidth || 1);

        for (var i = 0, len = data.length; i < len; i++) {
            var _geometry = data[i].geometry._coordinates;

            var verticesData = [];

            for (var j = 0; j < _geometry.length; j++) {
                var item = _geometry[j];

                var x = (item[0] - halfCanvasWidth) / halfCanvasWidth;
                var y = (halfCanvasHeight - item[1]) / halfCanvasHeight;
                verticesData.push(x, y);
            }

            var vertices = new Float32Array(verticesData);
            // Write date into the buffer object
            gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);
            gl.drawArrays(gl.LINE_STRIP, 0, _geometry.length);
        }
    }

    var line = {
        draw: draw$1
    };

    var vs_s$1 = ['attribute vec4 a_Position;', 'attribute float a_PointSize;', 'void main() {', 'gl_Position = a_Position;', 'gl_PointSize = a_PointSize;', '}'].join('');

    var fs_s$1 = ['precision mediump float;', 'uniform vec4 u_FragColor;', 'void main() {', 'gl_FragColor = u_FragColor;', '}'].join('');

    function draw$2(gl, data, options) {

        if (!data) {
            return;
        }

        var program = initShaders(gl, vs_s$1, fs_s$1);

        var a_Position = gl.getAttribLocation(program, 'a_Position');

        var a_PointSize = gl.getAttribLocation(program, 'a_PointSize');

        var uFragColor = gl.getUniformLocation(program, 'u_FragColor');

        //gl.clearColor(0.0, 0.0, 1.0, 1.0);
        gl.clear(gl.COLOR_BUFFER_BIT);

        var halfCanvasWidth = gl.canvas.width / 2;
        var halfCanvasHeight = gl.canvas.height / 2;

        var verticesData = [];
        var count = 0;
        for (var i = 0; i < data.length; i++) {
            var item = data[i].geometry._coordinates;

            var x = (item[0] - halfCanvasWidth) / halfCanvasWidth;
            var y = (halfCanvasHeight - item[1]) / halfCanvasHeight;

            if (x < -1 || x > 1 || y < -1 || y > 1) {
                continue;
            }
            verticesData.push(x, y);
            count++;
        }

        var vertices = new Float32Array(verticesData);
        var n = count; // The number of vertices

        // Create a buffer object
        var vertexBuffer = gl.createBuffer();

        // Bind the buffer object to target
        gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
        // Write date into the buffer object
        gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);

        // Assign the buffer object to a_Position variable
        gl.vertexAttribPointer(a_Position, 2, gl.FLOAT, false, 0, 0);

        // Enable the assignment to a_Position variable
        gl.enableVertexAttribArray(a_Position);

        gl.vertexAttrib1f(a_PointSize, options._size);

        var colored = getColorData(options.fillStyle || 'red');

        gl.uniform4f(uFragColor, colored[0] / 255, colored[1] / 255, colored[2] / 255, colored[3] / 255);
        gl.drawArrays(gl.POINTS, 0, n);
    }

    var point = {
        draw: draw$2
    };

    function earcut(data, holeIndices, dim) {

        dim = dim || 2;

        var hasHoles = holeIndices && holeIndices.length,
            outerLen = hasHoles ? holeIndices[0] * dim : data.length,
            outerNode = linkedList(data, 0, outerLen, dim, true),
            triangles = [];

        if (!outerNode) return triangles;

        var minX, minY, maxX, maxY, x, y, size;

        if (hasHoles) outerNode = eliminateHoles(data, holeIndices, outerNode, dim);

        // if the shape is not too simple, we'll use z-order curve hash later; calculate polygon bbox
        if (data.length > 80 * dim) {
            minX = maxX = data[0];
            minY = maxY = data[1];

            for (var i = dim; i < outerLen; i += dim) {
                x = data[i];
                y = data[i + 1];
                if (x < minX) minX = x;
                if (y < minY) minY = y;
                if (x > maxX) maxX = x;
                if (y > maxY) maxY = y;
            }

            // minX, minY and size are later used to transform coords into integers for z-order calculation
            size = Math.max(maxX - minX, maxY - minY);
        }

        earcutLinked(outerNode, triangles, dim, minX, minY, size);

        return triangles;
    }

    // create a circular doubly linked list from polygon points in the specified winding order
    function linkedList(data, start, end, dim, clockwise) {
        var i, last;

        if (clockwise === signedArea(data, start, end, dim) > 0) {
            for (i = start; i < end; i += dim) {
                last = insertNode(i, data[i], data[i + 1], last);
            }
        } else {
            for (i = end - dim; i >= start; i -= dim) {
                last = insertNode(i, data[i], data[i + 1], last);
            }
        }

        if (last && equals(last, last.next)) {
            removeNode(last);
            last = last.next;
        }

        return last;
    }

    // eliminate colinear or duplicate points
    function filterPoints(start, end) {
        if (!start) return start;
        if (!end) end = start;

        var p = start,
            again;
        do {
            again = false;

            if (!p.steiner && (equals(p, p.next) || area(p.prev, p, p.next) === 0)) {
                removeNode(p);
                p = end = p.prev;
                if (p === p.next) return null;
                again = true;
            } else {
                p = p.next;
            }
        } while (again || p !== end);

        return end;
    }

    // main ear slicing loop which triangulates a polygon (given as a linked list)
    function earcutLinked(ear, triangles, dim, minX, minY, size, pass) {
        if (!ear) return;

        // interlink polygon nodes in z-order
        if (!pass && size) indexCurve(ear, minX, minY, size);

        var stop = ear,
            prev,
            next;

        // iterate through ears, slicing them one by one
        while (ear.prev !== ear.next) {
            prev = ear.prev;
            next = ear.next;

            if (size ? isEarHashed(ear, minX, minY, size) : isEar(ear)) {
                // cut off the triangle
                triangles.push(prev.i / dim);
                triangles.push(ear.i / dim);
                triangles.push(next.i / dim);

                removeNode(ear);

                // skipping the next vertice leads to less sliver triangles
                ear = next.next;
                stop = next.next;

                continue;
            }

            ear = next;

            // if we looped through the whole remaining polygon and can't find any more ears
            if (ear === stop) {
                // try filtering points and slicing again
                if (!pass) {
                    earcutLinked(filterPoints(ear), triangles, dim, minX, minY, size, 1);

                    // if this didn't work, try curing all small self-intersections locally
                } else if (pass === 1) {
                    ear = cureLocalIntersections(ear, triangles, dim);
                    earcutLinked(ear, triangles, dim, minX, minY, size, 2);

                    // as a last resort, try splitting the remaining polygon into two
                } else if (pass === 2) {
                    splitEarcut(ear, triangles, dim, minX, minY, size);
                }

                break;
            }
        }
    }

    // check whether a polygon node forms a valid ear with adjacent nodes
    function isEar(ear) {
        var a = ear.prev,
            b = ear,
            c = ear.next;

        if (area(a, b, c) >= 0) return false; // reflex, can't be an ear

        // now make sure we don't have other points inside the potential ear
        var p = ear.next.next;

        while (p !== ear.prev) {
            if (pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;
            p = p.next;
        }

        return true;
    }

    function isEarHashed(ear, minX, minY, size) {
        var a = ear.prev,
            b = ear,
            c = ear.next;

        if (area(a, b, c) >= 0) return false; // reflex, can't be an ear

        // triangle bbox; min & max are calculated like this for speed
        var minTX = a.x < b.x ? a.x < c.x ? a.x : c.x : b.x < c.x ? b.x : c.x,
            minTY = a.y < b.y ? a.y < c.y ? a.y : c.y : b.y < c.y ? b.y : c.y,
            maxTX = a.x > b.x ? a.x > c.x ? a.x : c.x : b.x > c.x ? b.x : c.x,
            maxTY = a.y > b.y ? a.y > c.y ? a.y : c.y : b.y > c.y ? b.y : c.y;

        // z-order range for the current triangle bbox;
        var minZ = zOrder(minTX, minTY, minX, minY, size),
            maxZ = zOrder(maxTX, maxTY, minX, minY, size);

        // first look for points inside the triangle in increasing z-order
        var p = ear.nextZ;

        while (p && p.z <= maxZ) {
            if (p !== ear.prev && p !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;
            p = p.nextZ;
        }

        // then look for points in decreasing z-order
        p = ear.prevZ;

        while (p && p.z >= minZ) {
            if (p !== ear.prev && p !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;
            p = p.prevZ;
        }

        return true;
    }

    // go through all polygon nodes and cure small local self-intersections
    function cureLocalIntersections(start, triangles, dim) {
        var p = start;
        do {
            var a = p.prev,
                b = p.next.next;

            if (!equals(a, b) && intersects(a, p, p.next, b) && locallyInside(a, b) && locallyInside(b, a)) {

                triangles.push(a.i / dim);
                triangles.push(p.i / dim);
                triangles.push(b.i / dim);

                // remove two nodes involved
                removeNode(p);
                removeNode(p.next);

                p = start = b;
            }
            p = p.next;
        } while (p !== start);

        return p;
    }

    // try splitting polygon into two and triangulate them independently
    function splitEarcut(start, triangles, dim, minX, minY, size) {
        // look for a valid diagonal that divides the polygon into two
        var a = start;
        do {
            var b = a.next.next;
            while (b !== a.prev) {
                if (a.i !== b.i && isValidDiagonal(a, b)) {
                    // split the polygon in two by the diagonal
                    var c = splitPolygon(a, b);

                    // filter colinear points around the cuts
                    a = filterPoints(a, a.next);
                    c = filterPoints(c, c.next);

                    // run earcut on each half
                    earcutLinked(a, triangles, dim, minX, minY, size);
                    earcutLinked(c, triangles, dim, minX, minY, size);
                    return;
                }
                b = b.next;
            }
            a = a.next;
        } while (a !== start);
    }

    // link every hole into the outer loop, producing a single-ring polygon without holes
    function eliminateHoles(data, holeIndices, outerNode, dim) {
        var queue = [],
            i,
            len,
            start,
            end,
            list;

        for (i = 0, len = holeIndices.length; i < len; i++) {
            start = holeIndices[i] * dim;
            end = i < len - 1 ? holeIndices[i + 1] * dim : data.length;
            list = linkedList(data, start, end, dim, false);
            if (list === list.next) list.steiner = true;
            queue.push(getLeftmost(list));
        }

        queue.sort(compareX);

        // process holes from left to right
        for (i = 0; i < queue.length; i++) {
            eliminateHole(queue[i], outerNode);
            outerNode = filterPoints(outerNode, outerNode.next);
        }

        return outerNode;
    }

    function compareX(a, b) {
        return a.x - b.x;
    }

    // find a bridge between vertices that connects hole with an outer ring and and link it
    function eliminateHole(hole, outerNode) {
        outerNode = findHoleBridge(hole, outerNode);
        if (outerNode) {
            var b = splitPolygon(outerNode, hole);
            filterPoints(b, b.next);
        }
    }

    // David Eberly's algorithm for finding a bridge between hole and outer polygon
    function findHoleBridge(hole, outerNode) {
        var p = outerNode,
            hx = hole.x,
            hy = hole.y,
            qx = -Infinity,
            m;

        // find a segment intersected by a ray from the hole's leftmost point to the left;
        // segment's endpoint with lesser x will be potential connection point
        do {
            if (hy <= p.y && hy >= p.next.y) {
                var x = p.x + (hy - p.y) * (p.next.x - p.x) / (p.next.y - p.y);
                if (x <= hx && x > qx) {
                    qx = x;
                    if (x === hx) {
                        if (hy === p.y) return p;
                        if (hy === p.next.y) return p.next;
                    }
                    m = p.x < p.next.x ? p : p.next;
                }
            }
            p = p.next;
        } while (p !== outerNode);

        if (!m) return null;

        if (hx === qx) return m.prev; // hole touches outer segment; pick lower endpoint

        // look for points inside the triangle of hole point, segment intersection and endpoint;
        // if there are no points found, we have a valid connection;
        // otherwise choose the point of the minimum angle with the ray as connection point

        var stop = m,
            mx = m.x,
            my = m.y,
            tanMin = Infinity,
            tan;

        p = m.next;

        while (p !== stop) {
            if (hx >= p.x && p.x >= mx && pointInTriangle(hy < my ? hx : qx, hy, mx, my, hy < my ? qx : hx, hy, p.x, p.y)) {

                tan = Math.abs(hy - p.y) / (hx - p.x); // tangential

                if ((tan < tanMin || tan === tanMin && p.x > m.x) && locallyInside(p, hole)) {
                    m = p;
                    tanMin = tan;
                }
            }

            p = p.next;
        }

        return m;
    }

    // interlink polygon nodes in z-order
    function indexCurve(start, minX, minY, size) {
        var p = start;
        do {
            if (p.z === null) p.z = zOrder(p.x, p.y, minX, minY, size);
            p.prevZ = p.prev;
            p.nextZ = p.next;
            p = p.next;
        } while (p !== start);

        p.prevZ.nextZ = null;
        p.prevZ = null;

        sortLinked(p);
    }

    // Simon Tatham's linked list merge sort algorithm
    // http://www.chiark.greenend.org.uk/~sgtatham/algorithms/listsort.html
    function sortLinked(list) {
        var i,
            p,
            q,
            e,
            tail,
            numMerges,
            pSize,
            qSize,
            inSize = 1;

        do {
            p = list;
            list = null;
            tail = null;
            numMerges = 0;

            while (p) {
                numMerges++;
                q = p;
                pSize = 0;
                for (i = 0; i < inSize; i++) {
                    pSize++;
                    q = q.nextZ;
                    if (!q) break;
                }

                qSize = inSize;

                while (pSize > 0 || qSize > 0 && q) {

                    if (pSize === 0) {
                        e = q;
                        q = q.nextZ;
                        qSize--;
                    } else if (qSize === 0 || !q) {
                        e = p;
                        p = p.nextZ;
                        pSize--;
                    } else if (p.z <= q.z) {
                        e = p;
                        p = p.nextZ;
                        pSize--;
                    } else {
                        e = q;
                        q = q.nextZ;
                        qSize--;
                    }

                    if (tail) tail.nextZ = e;
                    else list = e;

                    e.prevZ = tail;
                    tail = e;
                }

                p = q;
            }

            tail.nextZ = null;
            inSize *= 2;
        } while (numMerges > 1);

        return list;
    }

    // z-order of a point given coords and size of the data bounding box
    function zOrder(x, y, minX, minY, size) {
        // coords are transformed into non-negative 15-bit integer range
        x = 32767 * (x - minX) / size;
        y = 32767 * (y - minY) / size;

        x = (x | x << 8) & 0x00FF00FF;
        x = (x | x << 4) & 0x0F0F0F0F;
        x = (x | x << 2) & 0x33333333;
        x = (x | x << 1) & 0x55555555;

        y = (y | y << 8) & 0x00FF00FF;
        y = (y | y << 4) & 0x0F0F0F0F;
        y = (y | y << 2) & 0x33333333;
        y = (y | y << 1) & 0x55555555;

        return x | y << 1;
    }

    // find the leftmost node of a polygon ring
    function getLeftmost(start) {
        var p = start,
            leftmost = start;
        do {
            if (p.x < leftmost.x) leftmost = p;
            p = p.next;
        } while (p !== start);

        return leftmost;
    }

    // check if a point lies within a convex triangle
    function pointInTriangle(ax, ay, bx, by, cx, cy, px, py) {
        return (cx - px) * (ay - py) - (ax - px) * (cy - py) >= 0 && (ax - px) * (by - py) - (bx - px) * (ay - py) >= 0 && (bx - px) * (cy - py) - (cx - px) * (by - py) >= 0;
    }

    // check if a diagonal between two polygon nodes is valid (lies in polygon interior)
    function isValidDiagonal(a, b) {
        return a.next.i !== b.i && a.prev.i !== b.i && !intersectsPolygon(a, b) && locallyInside(a, b) && locallyInside(b, a) && middleInside(a, b);
    }

    // signed area of a triangle
    function area(p, q, r) {
        return (q.y - p.y) * (r.x - q.x) - (q.x - p.x) * (r.y - q.y);
    }

    // check if two points are equal
    function equals(p1, p2) {
        return p1.x === p2.x && p1.y === p2.y;
    }

    // check if two segments intersect
    function intersects(p1, q1, p2, q2) {
        if (equals(p1, q1) && equals(p2, q2) || equals(p1, q2) && equals(p2, q1)) return true;
        return area(p1, q1, p2) > 0 !== area(p1, q1, q2) > 0 && area(p2, q2, p1) > 0 !== area(p2, q2, q1) > 0;
    }

    // check if a polygon diagonal intersects any polygon segments
    function intersectsPolygon(a, b) {
        var p = a;
        do {
            if (p.i !== a.i && p.next.i !== a.i && p.i !== b.i && p.next.i !== b.i && intersects(p, p.next, a, b)) return true;
            p = p.next;
        } while (p !== a);

        return false;
    }

    // check if a polygon diagonal is locally inside the polygon
    function locallyInside(a, b) {
        return area(a.prev, a, a.next) < 0 ? area(a, b, a.next) >= 0 && area(a, a.prev, b) >= 0 : area(a, b, a.prev) < 0 || area(a, a.next, b) < 0;
    }

    // check if the middle point of a polygon diagonal is inside the polygon
    function middleInside(a, b) {
        var p = a,
            inside = false,
            px = (a.x + b.x) / 2,
            py = (a.y + b.y) / 2;
        do {
            if (p.y > py !== p.next.y > py && px < (p.next.x - p.x) * (py - p.y) / (p.next.y - p.y) + p.x) inside = !inside;
            p = p.next;
        } while (p !== a);

        return inside;
    }

    // link two polygon vertices with a bridge; if the vertices belong to the same ring, it splits polygon into two;
    // if one belongs to the outer ring and another to a hole, it merges it into a single ring
    function splitPolygon(a, b) {
        var a2 = new Node(a.i, a.x, a.y),
            b2 = new Node(b.i, b.x, b.y),
            an = a.next,
            bp = b.prev;

        a.next = b;
        b.prev = a;

        a2.next = an;
        an.prev = a2;

        b2.next = a2;
        a2.prev = b2;

        bp.next = b2;
        b2.prev = bp;

        return b2;
    }

    // create a node and optionally link it with previous one (in a circular doubly linked list)
    function insertNode(i, x, y, last) {
        var p = new Node(i, x, y);

        if (!last) {
            p.prev = p;
            p.next = p;
        } else {
            p.next = last.next;
            p.prev = last;
            last.next.prev = p;
            last.next = p;
        }
        return p;
    }

    function removeNode(p) {
        p.next.prev = p.prev;
        p.prev.next = p.next;

        if (p.prevZ) p.prevZ.nextZ = p.nextZ;
        if (p.nextZ) p.nextZ.prevZ = p.prevZ;
    }

    function Node(i, x, y) {
        // vertice index in coordinates array
        this.i = i;

        // vertex coordinates
        this.x = x;
        this.y = y;

        // previous and next vertice nodes in a polygon ring
        this.prev = null;
        this.next = null;

        // z-order curve value
        this.z = null;

        // previous and next nodes in z-order
        this.prevZ = null;
        this.nextZ = null;

        // indicates whether this is a steiner point
        this.steiner = false;
    }

    // return a percentage difference between the polygon area and its triangulation area;
    // used to verify correctness of triangulation
    earcut.deviation = function(data, holeIndices, dim, triangles) {
        var hasHoles = holeIndices && holeIndices.length;
        var outerLen = hasHoles ? holeIndices[0] * dim : data.length;

        var polygonArea = Math.abs(signedArea(data, 0, outerLen, dim));
        if (hasHoles) {
            for (var i = 0, len = holeIndices.length; i < len; i++) {
                var start = holeIndices[i] * dim;
                var end = i < len - 1 ? holeIndices[i + 1] * dim : data.length;
                polygonArea -= Math.abs(signedArea(data, start, end, dim));
            }
        }

        var trianglesArea = 0;
        for (i = 0; i < triangles.length; i += 3) {
            var a = triangles[i] * dim;
            var b = triangles[i + 1] * dim;
            var c = triangles[i + 2] * dim;
            trianglesArea += Math.abs((data[a] - data[c]) * (data[b + 1] - data[a + 1]) - (data[a] - data[b]) * (data[c + 1] - data[a + 1]));
        }

        return polygonArea === 0 && trianglesArea === 0 ? 0 : Math.abs((trianglesArea - polygonArea) / polygonArea);
    };

    function signedArea(data, start, end, dim) {
        var sum = 0;
        for (var i = start, j = end - dim; i < end; i += dim) {
            sum += (data[j] - data[i]) * (data[i + 1] + data[j + 1]);
            j = i;
        }
        return sum;
    }

    // turn a polygon in a multi-dimensional array form (e.g. as in GeoJSON) into a form Earcut accepts
    earcut.flatten = function(data) {
        var dim = data[0][0].length,
            result = {
                vertices: [],
                holes: [],
                dimensions: dim
            },
            holeIndex = 0;

        for (var i = 0; i < data.length; i++) {
            for (var j = 0; j < data[i].length; j++) {
                for (var d = 0; d < dim; d++) {
                    result.vertices.push(data[i][j][d]);
                }
            }
            if (i > 0) {
                holeIndex += data[i - 1].length;
                result.holes.push(holeIndex);
            }
        }
        return result;
    };

    var vs_s$2 = ['attribute vec4 a_Position;', 'void main() {', 'gl_Position = a_Position;', 'gl_PointSize = 30.0;', '}'].join('');

    var fs_s$2 = ['precision mediump float;', 'uniform vec4 u_FragColor;', 'void main() {', 'gl_FragColor = u_FragColor;', '}'].join('');

    function draw$3(gl, data, options) {

        if (!data) {
            return;
        }

        // gl.clearColor(0.0, 0.0, 0.0, 1.0);
        gl.clear(gl.COLOR_BUFFER_BIT);
        gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);

        var program = initShaders(gl, vs_s$2, fs_s$2);

        gl.enable(gl.BLEND);
        gl.blendFunc(gl.SRC_ALPHA, gl.ONE);

        var halfCanvasWidth = gl.canvas.width / 2;
        var halfCanvasHeight = gl.canvas.height / 2;

        // Bind the buffer object to target
        gl.bindBuffer(gl.ARRAY_BUFFER, gl.createBuffer());
        gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.createBuffer());

        var a_Position = gl.getAttribLocation(program, 'a_Position');
        // Assign the buffer object to a_Position variable
        gl.vertexAttribPointer(a_Position, 2, gl.FLOAT, false, 0, 0);

        // Enable the assignment to a_Position variable
        gl.enableVertexAttribArray(a_Position);

        var uFragColor = gl.getUniformLocation(program, 'u_FragColor');

        var colored = getColorData(options.fillStyle || 'red');

        gl.uniform4f(uFragColor, colored[0] / 255, colored[1] / 255, colored[2] / 255, colored[3] / 255);

        gl.lineWidth(options.lineWidth || 1);

        var verticesArr = [];
        var trianglesArr = [];

        var maxSize = 65536;
        var indexOffset = 0;

        for (var i = 0, len = data.length; i < len; i++) {

            var flatten = earcut.flatten(data[i].geometry._coordinates || data[i].geometry.coordinates);
            var vertices = flatten.vertices;
            indexOffset = verticesArr.length / 2;
            for (var j = 0; j < vertices.length; j += 2) {
                vertices[j] = (vertices[j] - halfCanvasWidth) / halfCanvasWidth;
                vertices[j + 1] = (halfCanvasHeight - vertices[j + 1]) / halfCanvasHeight;
            }

            if ((verticesArr.length + vertices.length) / 2 > maxSize) {
                gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(verticesArr), gl.STATIC_DRAW);
                gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(trianglesArr), gl.STATIC_DRAW);
                gl.drawElements(gl.TRIANGLES, trianglesArr.length, gl.UNSIGNED_SHORT, 0);
                verticesArr.length = 0;
                trianglesArr.length = 0;
                indexOffset = 0;
            }

            for (var j = 0; j < vertices.length; j++) {
                verticesArr.push(vertices[j]);
            }

            var triangles = earcut(vertices, flatten.holes, flatten.dimensions);
            for (var j = 0; j < triangles.length; j++) {
                trianglesArr.push(triangles[j] + indexOffset);
            }
        }

        gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(verticesArr), gl.STATIC_DRAW);
        gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(trianglesArr), gl.STATIC_DRAW);
        gl.drawElements(gl.TRIANGLES, trianglesArr.length, gl.UNSIGNED_SHORT, 0);

        gl.bindBuffer(gl.ARRAY_BUFFER, null);
        gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, null);
    }

    var polygon = {
        draw: draw$3
    };

    /**
     * @author kyle / http://nikai.us/
     */
    var webglDrawSimple = {
        draw: function draw(gl, dataSet, options) {
            var data = dataSet instanceof DataSet ? dataSet.get() : dataSet;
            if (data.length > 0) {
                if (data[0].geometry.type == "LineString") {
                    line.draw(gl, data, options);
                } else if (data[0].geometry.type == "Polygon" || data[0].geometry.type == "MultiPolygon") {
                    polygon.draw(gl, data, options);
                } else {
                    point.draw(gl, data, options);
                }
            }
        }
    };

    /**
     * get the center by the city name
     * @author kyle / http://nikai.us/
     */

    var citycenter = {
        municipalities: [{
            n: "北京",
            g: "116.395645,39.929986|12"
        }, {
            n: "上海",
            g: "121.487899,31.249162|12"
        }, {
            n: "天津",
            g: "117.210813,39.14393|12"
        }, {
            n: "重庆",
            g: "106.530635,29.544606|12"
        }],
        provinces: [{
            n: "安徽",
            g: "117.216005,31.859252|8",
            cities: [{
                n: "合肥",
                g: "117.282699,31.866942|12"
            }, {
                n: "安庆",
                g: "117.058739,30.537898|13"
            }, {
                n: "蚌埠",
                g: "117.35708,32.929499|13"
            }, {
                n: "亳州",
                g: "115.787928,33.871211|13"
            }, {
                n: "巢湖",
                g: "117.88049,31.608733|13"
            }, {
                n: "池州",
                g: "117.494477,30.660019|14"
            }, {
                n: "滁州",
                g: "118.32457,32.317351|13"
            }, {
                n: "阜阳",
                g: "115.820932,32.901211|13"
            }, {
                n: "淮北",
                g: "116.791447,33.960023|13"
            }, {
                n: "淮南",
                g: "117.018639,32.642812|13"
            }, {
                n: "黄山",
                g: "118.29357,29.734435|13"
            }, {
                n: "六安",
                g: "116.505253,31.755558|13"
            }, {
                n: "马鞍山",
                g: "118.515882,31.688528|13"
            }, {
                n: "宿州",
                g: "116.988692,33.636772|13"
            }, {
                n: "铜陵",
                g: "117.819429,30.94093|14"
            }, {
                n: "芜湖",
                g: "118.384108,31.36602|12"
            }, {
                n: "宣城",
                g: "118.752096,30.951642|13"
            }]
        }, {
            n: "福建",
            g: "117.984943,26.050118|8",
            cities: [{
                n: "福州",
                g: "119.330221,26.047125|12"
            }, {
                n: "龙岩",
                g: "117.017997,25.078685|13"
            }, {
                n: "南平",
                g: "118.181883,26.643626|13"
            }, {
                n: "宁德",
                g: "119.542082,26.656527|14"
            }, {
                n: "莆田",
                g: "119.077731,25.44845|13"
            }, {
                n: "泉州",
                g: "118.600362,24.901652|12"
            }, {
                n: "三明",
                g: "117.642194,26.270835|14"
            }, {
                n: "厦门",
                g: "118.103886,24.489231|12"
            }, {
                n: "漳州",
                g: "117.676205,24.517065|12"
            }]
        }, {
            n: "甘肃",
            g: "102.457625,38.103267|6",
            cities: [{
                n: "兰州",
                g: "103.823305,36.064226|12"
            }, {
                n: "白银",
                g: "104.171241,36.546682|13"
            }, {
                n: "定西",
                g: "104.626638,35.586056|13"
            }, {
                n: "甘南州",
                g: "102.917442,34.992211|14"
            }, {
                n: "嘉峪关",
                g: "98.281635,39.802397|13"
            }, {
                n: "金昌",
                g: "102.208126,38.516072|13"
            }, {
                n: "酒泉",
                g: "98.508415,39.741474|13"
            }, {
                n: "临夏州",
                g: "103.215249,35.598514|13"
            }, {
                n: "陇南",
                g: "104.934573,33.39448|14"
            }, {
                n: "平凉",
                g: "106.688911,35.55011|13"
            }, {
                n: "庆阳",
                g: "107.644227,35.726801|13"
            }, {
                n: "天水",
                g: "105.736932,34.584319|13"
            }, {
                n: "武威",
                g: "102.640147,37.933172|13"
            }, {
                n: "张掖",
                g: "100.459892,38.93932|13"
            }]
        }, {
            n: "广东",
            g: "113.394818,23.408004|8",
            cities: [{
                n: "广州",
                g: "113.30765,23.120049|12"
            }, {
                n: "潮州",
                g: "116.630076,23.661812|13"
            }, {
                n: "东莞",
                g: "113.763434,23.043024|12"
            }, {
                n: "佛山",
                g: "113.134026,23.035095|13"
            }, {
                n: "河源",
                g: "114.713721,23.757251|12"
            }, {
                n: "惠州",
                g: "114.410658,23.11354|12"
            }, {
                n: "江门",
                g: "113.078125,22.575117|13"
            }, {
                n: "揭阳",
                g: "116.379501,23.547999|13"
            }, {
                n: "茂名",
                g: "110.931245,21.668226|13"
            }, {
                n: "梅州",
                g: "116.126403,24.304571|13"
            }, {
                n: "清远",
                g: "113.040773,23.698469|13"
            }, {
                n: "汕头",
                g: "116.72865,23.383908|13"
            }, {
                n: "汕尾",
                g: "115.372924,22.778731|14"
            }, {
                n: "韶关",
                g: "113.594461,24.80296|13"
            }, {
                n: "深圳",
                g: "114.025974,22.546054|12"
            }, {
                n: "阳江",
                g: "111.97701,21.871517|14"
            }, {
                n: "云浮",
                g: "112.050946,22.937976|13"
            }, {
                n: "湛江",
                g: "110.365067,21.257463|13"
            }, {
                n: "肇庆",
                g: "112.479653,23.078663|13"
            }, {
                n: "中山",
                g: "113.42206,22.545178|12"
            }, {
                n: "珠海",
                g: "113.562447,22.256915|13"
            }]
        }, {
            n: "广西",
            g: "108.924274,23.552255|7",
            cities: [{
                n: "南宁",
                g: "108.297234,22.806493|12"
            }, {
                n: "百色",
                g: "106.631821,23.901512|13"
            }, {
                n: "北海",
                g: "109.122628,21.472718|13"
            }, {
                n: "崇左",
                g: "107.357322,22.415455|14"
            }, {
                n: "防城港",
                g: "108.351791,21.617398|15"
            }, {
                n: "桂林",
                g: "110.26092,25.262901|12"
            }, {
                n: "贵港",
                g: "109.613708,23.103373|13"
            }, {
                n: "河池",
                g: "108.069948,24.699521|14"
            }, {
                n: "贺州",
                g: "111.552594,24.411054|14"
            }, {
                n: "来宾",
                g: "109.231817,23.741166|14"
            }, {
                n: "柳州",
                g: "109.422402,24.329053|12"
            }, {
                n: "钦州",
                g: "108.638798,21.97335|13"
            }, {
                n: "梧州",
                g: "111.305472,23.485395|13"
            }, {
                n: "玉林",
                g: "110.151676,22.643974|14"
            }]
        }, {
            n: "贵州",
            g: "106.734996,26.902826|8",
            cities: [{
                n: "贵阳",
                g: "106.709177,26.629907|12"
            }, {
                n: "安顺",
                g: "105.92827,26.228595|13"
            }, {
                n: "毕节地区",
                g: "105.300492,27.302612|14"
            }, {
                n: "六盘水",
                g: "104.852087,26.591866|13"
            }, {
                n: "铜仁地区",
                g: "109.196161,27.726271|14"
            }, {
                n: "遵义",
                g: "106.93126,27.699961|13"
            }, {
                n: "黔西南州",
                g: "104.900558,25.095148|11"
            }, {
                n: "黔东南州",
                g: "107.985353,26.583992|11"
            }, {
                n: "黔南州",
                g: "107.523205,26.264536|11"
            }]
        }, {
            n: "海南",
            g: "109.733755,19.180501|9",
            cities: [{
                n: "海口",
                g: "110.330802,20.022071|13"
            }, {
                n: "白沙",
                g: "109.358586,19.216056|12"
            }, {
                n: "保亭",
                g: "109.656113,18.597592|12"
            }, {
                n: "昌江",
                g: "109.0113,19.222483|12"
            }, {
                n: "儋州",
                g: "109.413973,19.571153|13"
            }, {
                n: "澄迈",
                g: "109.996736,19.693135|13"
            }, {
                n: "东方",
                g: "108.85101,18.998161|13"
            }, {
                n: "定安",
                g: "110.32009,19.490991|13"
            }, {
                n: "琼海",
                g: "110.414359,19.21483|13"
            }, {
                n: "琼中",
                g: "109.861849,19.039771|12"
            }, {
                n: "乐东",
                g: "109.062698,18.658614|12"
            }, {
                n: "临高",
                g: "109.724101,19.805922|13"
            }, {
                n: "陵水",
                g: "109.948661,18.575985|12"
            }, {
                n: "三亚",
                g: "109.522771,18.257776|12"
            }, {
                n: "屯昌",
                g: "110.063364,19.347749|13"
            }, {
                n: "万宁",
                g: "110.292505,18.839886|13"
            }, {
                n: "文昌",
                g: "110.780909,19.750947|13"
            }, {
                n: "五指山",
                g: "109.51775,18.831306|13"
            }]
        }, {
            n: "河北",
            g: "115.661434,38.61384|7",
            cities: [{
                n: "石家庄",
                g: "114.522082,38.048958|12"
            }, {
                n: "保定",
                g: "115.49481,38.886565|13"
            }, {
                n: "沧州",
                g: "116.863806,38.297615|13"
            }, {
                n: "承德",
                g: "117.933822,40.992521|14"
            }, {
                n: "邯郸",
                g: "114.482694,36.609308|13"
            }, {
                n: "衡水",
                g: "115.686229,37.746929|13"
            }, {
                n: "廊坊",
                g: "116.703602,39.518611|13"
            }, {
                n: "秦皇岛",
                g: "119.604368,39.945462|12"
            }, {
                n: "唐山",
                g: "118.183451,39.650531|13"
            }, {
                n: "邢台",
                g: "114.520487,37.069531|13"
            }, {
                n: "张家口",
                g: "114.893782,40.811188|13"
            }]
        }, {
            n: "河南",
            g: "113.486804,34.157184|7",
            cities: [{
                n: "郑州",
                g: "113.649644,34.75661|12"
            }, {
                n: "安阳",
                g: "114.351807,36.110267|12"
            }, {
                n: "鹤壁",
                g: "114.29777,35.755426|13"
            }, {
                n: "焦作",
                g: "113.211836,35.234608|13"
            }, {
                n: "开封",
                g: "114.351642,34.801854|13"
            }, {
                n: "洛阳",
                g: "112.447525,34.657368|12"
            }, {
                n: "漯河",
                g: "114.046061,33.576279|13"
            }, {
                n: "南阳",
                g: "112.542842,33.01142|13"
            }, {
                n: "平顶山",
                g: "113.300849,33.745301|13"
            }, {
                n: "濮阳",
                g: "115.026627,35.753298|12"
            }, {
                n: "三门峡",
                g: "111.181262,34.78332|13"
            }, {
                n: "商丘",
                g: "115.641886,34.438589|13"
            }, {
                n: "新乡",
                g: "113.91269,35.307258|13"
            }, {
                n: "信阳",
                g: "114.085491,32.128582|13"
            }, {
                n: "许昌",
                g: "113.835312,34.02674|13"
            }, {
                n: "周口",
                g: "114.654102,33.623741|13"
            }, {
                n: "驻马店",
                g: "114.049154,32.983158|13"
            }]
        }, {
            n: "黑龙江",
            g: "128.047414,47.356592|6",
            cities: [{
                n: "哈尔滨",
                g: "126.657717,45.773225|12"
            }, {
                n: "大庆",
                g: "125.02184,46.596709|12"
            }, {
                n: "大兴安岭地区",
                g: "124.196104,51.991789|10"
            }, {
                n: "鹤岗",
                g: "130.292472,47.338666|13"
            }, {
                n: "黑河",
                g: "127.50083,50.25069|14"
            }, {
                n: "鸡西",
                g: "130.941767,45.32154|13"
            }, {
                n: "佳木斯",
                g: "130.284735,46.81378|12"
            }, {
                n: "牡丹江",
                g: "129.608035,44.588521|13"
            }, {
                n: "七台河",
                g: "131.019048,45.775005|14"
            }, {
                n: "齐齐哈尔",
                g: "123.987289,47.3477|13"
            }, {
                n: "双鸭山",
                g: "131.171402,46.655102|13"
            }, {
                n: "绥化",
                g: "126.989095,46.646064|13"
            }, {
                n: "伊春",
                g: "128.910766,47.734685|14"
            }]
        }, {
            n: "湖北",
            g: "112.410562,31.209316|8",
            cities: [{
                n: "武汉",
                g: "114.3162,30.581084|12"
            }, {
                n: "鄂州",
                g: "114.895594,30.384439|14"
            }, {
                n: "恩施",
                g: "109.517433,30.308978|14"
            }, {
                n: "黄冈",
                g: "114.906618,30.446109|14"
            }, {
                n: "黄石",
                g: "115.050683,30.216127|13"
            }, {
                n: "荆门",
                g: "112.21733,31.042611|13"
            }, {
                n: "荆州",
                g: "112.241866,30.332591|12"
            }, {
                n: "潜江",
                g: "112.768768,30.343116|13"
            }, {
                n: "神农架林区",
                g: "110.487231,31.595768|13"
            }, {
                n: "十堰",
                g: "110.801229,32.636994|13"
            }, {
                n: "随州",
                g: "113.379358,31.717858|13"
            }, {
                n: "天门",
                g: "113.12623,30.649047|13"
            }, {
                n: "仙桃",
                g: "113.387448,30.293966|13"
            }, {
                n: "咸宁",
                g: "114.300061,29.880657|13"
            }, {
                n: "襄阳",
                g: "112.176326,32.094934|12"
            }, {
                n: "孝感",
                g: "113.935734,30.927955|13"
            }, {
                n: "宜昌",
                g: "111.310981,30.732758|13"
            }]
        }, {
            n: "湖南",
            g: "111.720664,27.695864|7",
            cities: [{
                n: "长沙",
                g: "112.979353,28.213478|12"
            }, {
                n: "常德",
                g: "111.653718,29.012149|12"
            }, {
                n: "郴州",
                g: "113.037704,25.782264|13"
            }, {
                n: "衡阳",
                g: "112.583819,26.898164|13"
            }, {
                n: "怀化",
                g: "109.986959,27.557483|13"
            }, {
                n: "娄底",
                g: "111.996396,27.741073|13"
            }, {
                n: "邵阳",
                g: "111.461525,27.236811|13"
            }, {
                n: "湘潭",
                g: "112.935556,27.835095|13"
            }, {
                n: "湘西州",
                g: "109.745746,28.317951|14"
            }, {
                n: "益阳",
                g: "112.366547,28.588088|13"
            }, {
                n: "永州",
                g: "111.614648,26.435972|13"
            }, {
                n: "岳阳",
                g: "113.146196,29.378007|13"
            }, {
                n: "张家界",
                g: "110.48162,29.124889|13"
            }, {
                n: "株洲",
                g: "113.131695,27.827433|13"
            }]
        }, {
            n: "江苏",
            g: "119.368489,33.013797|8",
            cities: [{
                n: "南京",
                g: "118.778074,32.057236|12"
            }, {
                n: "常州",
                g: "119.981861,31.771397|12"
            }, {
                n: "淮安",
                g: "119.030186,33.606513|12"
            }, {
                n: "连云港",
                g: "119.173872,34.601549|12"
            }, {
                n: "南通",
                g: "120.873801,32.014665|12"
            }, {
                n: "苏州",
                g: "120.619907,31.317987|12"
            }, {
                n: "宿迁",
                g: "118.296893,33.95205|13"
            }, {
                n: "泰州",
                g: "119.919606,32.476053|13"
            }, {
                n: "无锡",
                g: "120.305456,31.570037|12"
            }, {
                n: "徐州",
                g: "117.188107,34.271553|12"
            }, {
                n: "盐城",
                g: "120.148872,33.379862|12"
            }, {
                n: "扬州",
                g: "119.427778,32.408505|13"
            }, {
                n: "镇江",
                g: "119.455835,32.204409|13"
            }]
        }, {
            n: "江西",
            g: "115.676082,27.757258|7",
            cities: [{
                n: "南昌",
                g: "115.893528,28.689578|12"
            }, {
                n: "抚州",
                g: "116.360919,27.954545|13"
            }, {
                n: "赣州",
                g: "114.935909,25.845296|13"
            }, {
                n: "吉安",
                g: "114.992039,27.113848|13"
            }, {
                n: "景德镇",
                g: "117.186523,29.303563|12"
            }, {
                n: "九江",
                g: "115.999848,29.71964|13"
            }, {
                n: "萍乡",
                g: "113.859917,27.639544|13"
            }, {
                n: "上饶",
                g: "117.955464,28.457623|13"
            }, {
                n: "新余",
                g: "114.947117,27.822322|13"
            }, {
                n: "宜春",
                g: "114.400039,27.81113|13"
            }, {
                n: "鹰潭",
                g: "117.03545,28.24131|13"
            }]
        }, {
            n: "吉林",
            g: "126.262876,43.678846|7",
            cities: [{
                n: "长春",
                g: "125.313642,43.898338|12"
            }, {
                n: "白城",
                g: "122.840777,45.621086|13"
            }, {
                n: "白山",
                g: "126.435798,41.945859|13"
            }, {
                n: "吉林市",
                g: "126.564544,43.871988|12"
            }, {
                n: "辽源",
                g: "125.133686,42.923303|13"
            }, {
                n: "四平",
                g: "124.391382,43.175525|12"
            }, {
                n: "松原",
                g: "124.832995,45.136049|13"
            }, {
                n: "通化",
                g: "125.94265,41.736397|13"
            }, {
                n: "延边",
                g: "129.485902,42.896414|13"
            }]
        }, {
            n: "辽宁",
            g: "122.753592,41.6216|8",
            cities: [{
                n: "沈阳",
                g: "123.432791,41.808645|12"
            }, {
                n: "鞍山",
                g: "123.007763,41.118744|13"
            }, {
                n: "本溪",
                g: "123.778062,41.325838|12"
            }, {
                n: "朝阳",
                g: "120.446163,41.571828|13"
            }, {
                n: "大连",
                g: "121.593478,38.94871|12"
            }, {
                n: "丹东",
                g: "124.338543,40.129023|12"
            }, {
                n: "抚顺",
                g: "123.92982,41.877304|12"
            }, {
                n: "阜新",
                g: "121.660822,42.01925|14"
            }, {
                n: "葫芦岛",
                g: "120.860758,40.74303|13"
            }, {
                n: "锦州",
                g: "121.147749,41.130879|13"
            }, {
                n: "辽阳",
                g: "123.172451,41.273339|14"
            }, {
                n: "盘锦",
                g: "122.073228,41.141248|13"
            }, {
                n: "铁岭",
                g: "123.85485,42.299757|13"
            }, {
                n: "营口",
                g: "122.233391,40.668651|13"
            }]
        }, {
            n: "内蒙古",
            g: "114.415868,43.468238|5",
            cities: [{
                n: "呼和浩特",
                g: "111.660351,40.828319|12"
            }, {
                n: "阿拉善盟",
                g: "105.695683,38.843075|14"
            }, {
                n: "包头",
                g: "109.846239,40.647119|12"
            }, {
                n: "巴彦淖尔",
                g: "107.423807,40.76918|12"
            }, {
                n: "赤峰",
                g: "118.930761,42.297112|12"
            }, {
                n: "鄂尔多斯",
                g: "109.993706,39.81649|12"
            }, {
                n: "呼伦贝尔",
                g: "119.760822,49.201636|12"
            }, {
                n: "通辽",
                g: "122.260363,43.633756|12"
            }, {
                n: "乌海",
                g: "106.831999,39.683177|13"
            }, {
                n: "乌兰察布",
                g: "113.112846,41.022363|12"
            }, {
                n: "锡林郭勒盟",
                g: "116.02734,43.939705|11"
            }, {
                n: "兴安盟",
                g: "122.048167,46.083757|11"
            }]
        }, {
            n: "宁夏",
            g: "106.155481,37.321323|8",
            cities: [{
                n: "银川",
                g: "106.206479,38.502621|12"
            }, {
                n: "固原",
                g: "106.285268,36.021523|13"
            }, {
                n: "石嘴山",
                g: "106.379337,39.020223|13"
            }, {
                n: "吴忠",
                g: "106.208254,37.993561|14"
            }, {
                n: "中卫",
                g: "105.196754,37.521124|14"
            }]
        }, {
            n: "青海",
            g: "96.202544,35.499761|7",
            cities: [{
                n: "西宁",
                g: "101.767921,36.640739|12"
            }, {
                n: "果洛州",
                g: "100.223723,34.480485|11"
            }, {
                n: "海东地区",
                g: "102.085207,36.51761|11"
            }, {
                n: "海北州",
                g: "100.879802,36.960654|11"
            }, {
                n: "海南州",
                g: "100.624066,36.284364|11"
            }, {
                n: "海西州",
                g: "97.342625,37.373799|11"
            }, {
                n: "黄南州",
                g: "102.0076,35.522852|11"
            }, {
                n: "玉树州",
                g: "97.013316,33.00624|14"
            }]
        }, {
            n: "山东",
            g: "118.527663,36.09929|8",
            cities: [{
                n: "济南",
                g: "117.024967,36.682785|12"
            }, {
                n: "滨州",
                g: "117.968292,37.405314|12"
            }, {
                n: "东营",
                g: "118.583926,37.487121|12"
            }, {
                n: "德州",
                g: "116.328161,37.460826|12"
            }, {
                n: "菏泽",
                g: "115.46336,35.26244|13"
            }, {
                n: "济宁",
                g: "116.600798,35.402122|13"
            }, {
                n: "莱芜",
                g: "117.684667,36.233654|13"
            }, {
                n: "聊城",
                g: "115.986869,36.455829|12"
            }, {
                n: "临沂",
                g: "118.340768,35.072409|12"
            }, {
                n: "青岛",
                g: "120.384428,36.105215|12"
            }, {
                n: "日照",
                g: "119.50718,35.420225|12"
            }, {
                n: "泰安",
                g: "117.089415,36.188078|13"
            }, {
                n: "威海",
                g: "122.093958,37.528787|13"
            }, {
                n: "潍坊",
                g: "119.142634,36.716115|12"
            }, {
                n: "烟台",
                g: "121.309555,37.536562|12"
            }, {
                n: "枣庄",
                g: "117.279305,34.807883|13"
            }, {
                n: "淄博",
                g: "118.059134,36.804685|12"
            }]
        }, {
            n: "山西",
            g: "112.515496,37.866566|7",
            cities: [{
                n: "太原",
                g: "112.550864,37.890277|12"
            }, {
                n: "长治",
                g: "113.120292,36.201664|12"
            }, {
                n: "大同",
                g: "113.290509,40.113744|12"
            }, {
                n: "晋城",
                g: "112.867333,35.499834|13"
            }, {
                n: "晋中",
                g: "112.738514,37.693362|13"
            }, {
                n: "临汾",
                g: "111.538788,36.099745|13"
            }, {
                n: "吕梁",
                g: "111.143157,37.527316|14"
            }, {
                n: "朔州",
                g: "112.479928,39.337672|13"
            }, {
                n: "忻州",
                g: "112.727939,38.461031|12"
            }, {
                n: "阳泉",
                g: "113.569238,37.869529|13"
            }, {
                n: "运城",
                g: "111.006854,35.038859|13"
            }]
        }, {
            n: "陕西",
            g: "109.503789,35.860026|7",
            cities: [{
                n: "西安",
                g: "108.953098,34.2778|12"
            }, {
                n: "安康",
                g: "109.038045,32.70437|13"
            }, {
                n: "宝鸡",
                g: "107.170645,34.364081|12"
            }, {
                n: "汉中",
                g: "107.045478,33.081569|13"
            }, {
                n: "商洛",
                g: "109.934208,33.873907|13"
            }, {
                n: "铜川",
                g: "108.968067,34.908368|13"
            }, {
                n: "渭南",
                g: "109.483933,34.502358|13"
            }, {
                n: "咸阳",
                g: "108.707509,34.345373|13"
            }, {
                n: "延安",
                g: "109.50051,36.60332|13"
            }, {
                n: "榆林",
                g: "109.745926,38.279439|12"
            }]
        }, {
            n: "四川",
            g: "102.89916,30.367481|7",
            cities: [{
                n: "成都",
                g: "104.067923,30.679943|12"
            }, {
                n: "阿坝州",
                g: "102.228565,31.905763|15"
            }, {
                n: "巴中",
                g: "106.757916,31.869189|14"
            }, {
                n: "达州",
                g: "107.494973,31.214199|14"
            }, {
                n: "德阳",
                g: "104.402398,31.13114|13"
            }, {
                n: "甘孜州",
                g: "101.969232,30.055144|15"
            }, {
                n: "广安",
                g: "106.63572,30.463984|13"
            }, {
                n: "广元",
                g: "105.819687,32.44104|13"
            }, {
                n: "乐山",
                g: "103.760824,29.600958|13"
            }, {
                n: "凉山州",
                g: "102.259591,27.892393|14"
            }, {
                n: "泸州",
                g: "105.44397,28.89593|14"
            }, {
                n: "南充",
                g: "106.105554,30.800965|13"
            }, {
                n: "眉山",
                g: "103.84143,30.061115|13"
            }, {
                n: "绵阳",
                g: "104.705519,31.504701|12"
            }, {
                n: "内江",
                g: "105.073056,29.599462|13"
            }, {
                n: "攀枝花",
                g: "101.722423,26.587571|14"
            }, {
                n: "遂宁",
                g: "105.564888,30.557491|12"
            }, {
                n: "雅安",
                g: "103.009356,29.999716|13"
            }, {
                n: "宜宾",
                g: "104.633019,28.769675|13"
            }, {
                n: "资阳",
                g: "104.63593,30.132191|13"
            }, {
                n: "自贡",
                g: "104.776071,29.359157|13"
            }]
        }, {
            n: "西藏",
            g: "89.137982,31.367315|6",
            cities: [{
                n: "拉萨",
                g: "91.111891,29.662557|13"
            }, {
                n: "阿里地区",
                g: "81.107669,30.404557|11"
            }, {
                n: "昌都地区",
                g: "97.185582,31.140576|15"
            }, {
                n: "林芝地区",
                g: "94.349985,29.666941|11"
            }, {
                n: "那曲地区",
                g: "92.067018,31.48068|14"
            }, {
                n: "日喀则地区",
                g: "88.891486,29.269023|14"
            }, {
                n: "山南地区",
                g: "91.750644,29.229027|11"
            }]
        }, {
            n: "新疆",
            g: "85.614899,42.127001|6",
            cities: [{
                n: "乌鲁木齐",
                g: "87.564988,43.84038|12"
            }, {
                n: "阿拉尔",
                g: "81.291737,40.61568|13"
            }, {
                n: "阿克苏地区",
                g: "80.269846,41.171731|12"
            }, {
                n: "阿勒泰地区",
                g: "88.137915,47.839744|13"
            }, {
                n: "巴音郭楞",
                g: "86.121688,41.771362|12"
            }, {
                n: "博尔塔拉州",
                g: "82.052436,44.913651|11"
            }, {
                n: "昌吉州",
                g: "87.296038,44.007058|13"
            }, {
                n: "哈密地区",
                g: "93.528355,42.858596|13"
            }, {
                n: "和田地区",
                g: "79.930239,37.116774|13"
            }, {
                n: "喀什地区",
                g: "75.992973,39.470627|12"
            }, {
                n: "克拉玛依",
                g: "84.88118,45.594331|13"
            }, {
                n: "克孜勒苏州",
                g: "76.137564,39.750346|11"
            }, {
                n: "石河子",
                g: "86.041865,44.308259|13"
            }, {
                n: "塔城地区",
                g: "82.974881,46.758684|12"
            }, {
                n: "图木舒克",
                g: "79.198155,39.889223|13"
            }, {
                n: "吐鲁番地区",
                g: "89.181595,42.96047|13"
            }, {
                n: "五家渠",
                g: "87.565449,44.368899|13"
            }, {
                n: "伊犁州",
                g: "81.297854,43.922248|11"
            }]
        }, {
            n: "云南",
            g: "101.592952,24.864213|7",
            cities: [{
                n: "昆明",
                g: "102.714601,25.049153|12"
            }, {
                n: "保山",
                g: "99.177996,25.120489|13"
            }, {
                n: "楚雄州",
                g: "101.529382,25.066356|13"
            }, {
                n: "大理州",
                g: "100.223675,25.5969|14"
            }, {
                n: "德宏州",
                g: "98.589434,24.44124|14"
            }, {
                n: "迪庆州",
                g: "99.713682,27.831029|14"
            }, {
                n: "红河州",
                g: "103.384065,23.367718|11"
            }, {
                n: "丽江",
                g: "100.229628,26.875351|13"
            }, {
                n: "临沧",
                g: "100.092613,23.887806|14"
            }, {
                n: "怒江州",
                g: "98.859932,25.860677|14"
            }, {
                n: "普洱",
                g: "100.980058,22.788778|14"
            }, {
                n: "曲靖",
                g: "103.782539,25.520758|12"
            }, {
                n: "昭通",
                g: "103.725021,27.340633|13"
            }, {
                n: "文山",
                g: "104.089112,23.401781|14"
            }, {
                n: "西双版纳",
                g: "100.803038,22.009433|13"
            }, {
                n: "玉溪",
                g: "102.545068,24.370447|13"
            }]
        }, {
            n: "浙江",
            g: "119.957202,29.159494|8",
            cities: [{
                n: "杭州",
                g: "120.219375,30.259244|12"
            }, {
                n: "湖州",
                g: "120.137243,30.877925|12"
            }, {
                n: "嘉兴",
                g: "120.760428,30.773992|13"
            }, {
                n: "金华",
                g: "119.652576,29.102899|12"
            }, {
                n: "丽水",
                g: "119.929576,28.4563|13"
            }, {
                n: "宁波",
                g: "121.579006,29.885259|12"
            }, {
                n: "衢州",
                g: "118.875842,28.95691|12"
            }, {
                n: "绍兴",
                g: "120.592467,30.002365|13"
            }, {
                n: "台州",
                g: "121.440613,28.668283|13"
            }, {
                n: "温州",
                g: "120.690635,28.002838|12"
            }, {
                n: "舟山",
                g: "122.169872,30.03601|13"
            }]
        }],
        other: [{
            n: "香港",
            g: "114.186124,22.293586|11"
        }, {
            n: "澳门",
            g: "113.557519,22.204118|13"
        }, {
            n: "台湾",
            g: "120.961454,23.80406|8"
        }]
    };

    function getCenter(g) {
        var item = g.split("|");
        item[0] = item[0].split(",");
        return {
            lng: parseFloat(item[0][0]),
            lat: parseFloat(item[0][1])
        };
    }

    var cityCenter = {
        getCenterByCityName: function getCenterByCityName(name) {
            for (var i = 0; i < citycenter.municipalities.length; i++) {
                if (citycenter.municipalities[i].n == name) {
                    return getCenter(citycenter.municipalities[i].g);
                }
            }

            var provinces = citycenter.provinces;
            for (var i = 0; i < provinces.length; i++) {
                if (provinces[i].n == name) {
                    return getCenter(provinces[i].g);
                }
                var cities = provinces[i].cities;
                for (var j = 0; j < cities.length; j++) {
                    if (cities[j].n == name) {
                        return getCenter(cities[j].g);
                    }
                }
            }
            return null;
        }
    };

    /**
     * 根据弧线的坐标节点数组
     */
    function getCurvePoints(points) {
        var curvePoints = [];
        for (var i = 0; i < points.length - 1; i++) {
            var p = getCurveByTwoPoints(points[i], points[i + 1]);
            if (p && p.length > 0) {
                curvePoints = curvePoints.concat(p);
            }
        }
        return curvePoints;
    }

    /**
     * 根据两点获取曲线坐标点数组
     * @param Point 起点
     * @param Point 终点
     */
    function getCurveByTwoPoints(obj1, obj2) {
        if (!obj1 || !obj2) {
            return null;
        }

        var B1 = function B1(x) {
            return 1 - 2 * x + x * x;
        };
        var B2 = function B2(x) {
            return 2 * x - 2 * x * x;
        };
        var B3 = function B3(x) {
            return x * x;
        };

        var curveCoordinates = [];

        var count = 40; // 曲线是由一些小的线段组成的，这个表示这个曲线所有到的折线的个数
        var isFuture = false;
        var t, h, h2, lat3, lng3, j, t2;
        var LnArray = [];
        var i = 0;
        var inc = 0;

        if (typeof obj2 == "undefined") {
            if (typeof curveCoordinates != "undefined") {
                curveCoordinates = [];
            }
            return;
        }

        var lat1 = parseFloat(obj1.lat);
        var lat2 = parseFloat(obj2.lat);
        var lng1 = parseFloat(obj1.lng);
        var lng2 = parseFloat(obj2.lng);

        // 计算曲线角度的方法
        if (lng2 > lng1) {
            if (parseFloat(lng2 - lng1) > 180) {
                if (lng1 < 0) {
                    lng1 = parseFloat(180 + 180 + lng1);
                }
            }
        }

        if (lng1 > lng2) {
            if (parseFloat(lng1 - lng2) > 180) {
                if (lng2 < 0) {
                    lng2 = parseFloat(180 + 180 + lng2);
                }
            }
        }
        j = 0;
        t2 = 0;
        if (lat2 == lat1) {
            t = 0;
            h = lng1 - lng2;
        } else if (lng2 == lng1) {
            t = Math.PI / 2;
            h = lat1 - lat2;
        } else {
            t = Math.atan((lat2 - lat1) / (lng2 - lng1));
            h = (lat2 - lat1) / Math.sin(t);
        }
        if (t2 == 0) {
            t2 = t + Math.PI / 5;
        }
        h2 = h / 2;
        lng3 = h2 * Math.cos(t2) + lng1;
        lat3 = h2 * Math.sin(t2) + lat1;

        for (i = 0; i < count + 1; i++) {
            curveCoordinates.push([lng1 * B1(inc) + lng3 * B2(inc) + lng2 * B3(inc), lat1 * B1(inc) + lat3 * B2(inc) + lat2 * B3(inc)]);
            inc = inc + 1 / count;
        }
        return curveCoordinates;
    }

    var curve = {
        getPoints: getCurvePoints
    };

    /* 
    FDEB algorithm implementation [www.win.tue.nl/~dholten/papers/forcebundles_eurovis.pdf].

    Author:  (github.com/upphiminn)
    2013

    */

    var ForceEdgeBundling = function ForceEdgeBundling() {
        var data_nodes = {},
            // {'nodeid':{'x':,'y':},..}
            data_edges = [],
            // [{'source':'nodeid1', 'target':'nodeid2'},..]
            compatibility_list_for_edge = [],
            subdivision_points_for_edge = [],
            K = 0.1,
            // global bundling constant controling edge stiffness
            S_initial = 0.1,
            // init. distance to move points
            P_initial = 1,
            // init. subdivision number
            P_rate = 2,
            // subdivision rate increase
            C = 6,
            // number of cycles to perform
            I_initial = 70,
            // init. number of iterations for cycle
            I_rate = 0.6666667,
            // rate at which iteration number decreases i.e. 2/3
            compatibility_threshold = 0.6,
            invers_quadratic_mode = false,
            eps = 1e-8;

        /*** Geometry Helper Methods ***/
        function vector_dot_product(p, q) {
            return p.x * q.x + p.y * q.y;
        }

        function edge_as_vector(P) {
            return {
                'x': data_nodes[P.target].x - data_nodes[P.source].x,
                'y': data_nodes[P.target].y - data_nodes[P.source].y
            };
        }

        function edge_length(e) {
            return Math.sqrt(Math.pow(data_nodes[e.source].x - data_nodes[e.target].x, 2) + Math.pow(data_nodes[e.source].y - data_nodes[e.target].y, 2));
        }

        function custom_edge_length(e) {
            return Math.sqrt(Math.pow(e.source.x - e.target.x, 2) + Math.pow(e.source.y - e.target.y, 2));
        }

        function edge_midpoint(e) {
            var middle_x = (data_nodes[e.source].x + data_nodes[e.target].x) / 2.0;
            var middle_y = (data_nodes[e.source].y + data_nodes[e.target].y) / 2.0;
            return {
                'x': middle_x,
                'y': middle_y
            };
        }

        function compute_divided_edge_length(e_idx) {
            var length = 0;
            for (var i = 1; i < subdivision_points_for_edge[e_idx].length; i++) {
                var segment_length = euclidean_distance(subdivision_points_for_edge[e_idx][i], subdivision_points_for_edge[e_idx][i - 1]);
                length += segment_length;
            }
            return length;
        }

        function euclidean_distance(p, q) {
            return Math.sqrt(Math.pow(p.x - q.x, 2) + Math.pow(p.y - q.y, 2));
        }

        function project_point_on_line(p, Q) {
            var L = Math.sqrt((Q.target.x - Q.source.x) * (Q.target.x - Q.source.x) + (Q.target.y - Q.source.y) * (Q.target.y - Q.source.y));
            var r = ((Q.source.y - p.y) * (Q.source.y - Q.target.y) - (Q.source.x - p.x) * (Q.target.x - Q.source.x)) / (L * L);

            return {
                'x': Q.source.x + r * (Q.target.x - Q.source.x),
                'y': Q.source.y + r * (Q.target.y - Q.source.y)
            };
        }

        /*** ********************** ***/

        /*** Initialization Methods ***/
        function initialize_edge_subdivisions() {
            for (var i = 0; i < data_edges.length; i++) {
                if (P_initial == 1) subdivision_points_for_edge[i] = []; //0 subdivisions
                else {
                    subdivision_points_for_edge[i] = [];
                    subdivision_points_for_edge[i].push(data_nodes[data_edges[i].source]);
                    subdivision_points_for_edge[i].push(data_nodes[data_edges[i].target]);
                }
            }
        }

        function initialize_compatibility_lists() {
            for (var i = 0; i < data_edges.length; i++) {
                compatibility_list_for_edge[i] = [];
            } //0 compatible edges.
        }

        function filter_self_loops(edgelist) {
            var filtered_edge_list = [];
            for (var e = 0; e < edgelist.length; e++) {
                if (data_nodes[edgelist[e].source].x != data_nodes[edgelist[e].target].x && data_nodes[edgelist[e].source].y != data_nodes[edgelist[e].target].y) {
                    //or smaller than eps
                    filtered_edge_list.push(edgelist[e]);
                }
            }

            return filtered_edge_list;
        }
        /*** ********************** ***/

        /*** Force Calculation Methods ***/
        function apply_spring_force(e_idx, i, kP) {

            var prev = subdivision_points_for_edge[e_idx][i - 1];
            var next = subdivision_points_for_edge[e_idx][i + 1];
            var crnt = subdivision_points_for_edge[e_idx][i];

            var x = prev.x - crnt.x + next.x - crnt.x;
            var y = prev.y - crnt.y + next.y - crnt.y;

            x *= kP;
            y *= kP;

            return {
                'x': x,
                'y': y
            };
        }

        function apply_electrostatic_force(e_idx, i, S) {
            var sum_of_forces = {
                'x': 0,
                'y': 0
            };
            var compatible_edges_list = compatibility_list_for_edge[e_idx];

            for (var oe = 0; oe < compatible_edges_list.length; oe++) {
                var force = {
                    'x': subdivision_points_for_edge[compatible_edges_list[oe]][i].x - subdivision_points_for_edge[e_idx][i].x,
                    'y': subdivision_points_for_edge[compatible_edges_list[oe]][i].y - subdivision_points_for_edge[e_idx][i].y
                };

                if (Math.abs(force.x) > eps || Math.abs(force.y) > eps) {

                    var diff = 1 / Math.pow(custom_edge_length({
                        'source': subdivision_points_for_edge[compatible_edges_list[oe]][i],
                        'target': subdivision_points_for_edge[e_idx][i]
                    }), 1);

                    sum_of_forces.x += force.x * diff;
                    sum_of_forces.y += force.y * diff;
                }
            }
            return sum_of_forces;
        }

        function apply_resulting_forces_on_subdivision_points(e_idx, P, S) {
            var kP = K / (edge_length(data_edges[e_idx]) * (P + 1)); // kP=K/|P|(number of segments), where |P| is the initial length of edge P.
            // (length * (num of sub division pts - 1))
            var resulting_forces_for_subdivision_points = [{
                'x': 0,
                'y': 0
            }];
            for (var i = 1; i < P + 1; i++) {
                // exclude initial end points of the edge 0 and P+1
                var resulting_force = {
                    'x': 0,
                    'y': 0
                };

                var spring_force = apply_spring_force(e_idx, i, kP);
                var electrostatic_force = apply_electrostatic_force(e_idx, i, S);

                resulting_force.x = S * (spring_force.x + electrostatic_force.x);
                resulting_force.y = S * (spring_force.y + electrostatic_force.y);

                resulting_forces_for_subdivision_points.push(resulting_force);
            }
            resulting_forces_for_subdivision_points.push({
                'x': 0,
                'y': 0
            });
            return resulting_forces_for_subdivision_points;
        }
        /*** ********************** ***/

        /*** Edge Division Calculation Methods ***/
        function update_edge_divisions(P) {
            for (var e_idx = 0; e_idx < data_edges.length; e_idx++) {

                if (P == 1) {
                    subdivision_points_for_edge[e_idx].push(data_nodes[data_edges[e_idx].source]); // source
                    subdivision_points_for_edge[e_idx].push(edge_midpoint(data_edges[e_idx])); // mid point
                    subdivision_points_for_edge[e_idx].push(data_nodes[data_edges[e_idx].target]); // target
                } else {

                    var divided_edge_length = compute_divided_edge_length(e_idx);
                    var segment_length = divided_edge_length / (P + 1);
                    var current_segment_length = segment_length;
                    var new_subdivision_points = [];
                    new_subdivision_points.push(data_nodes[data_edges[e_idx].source]); //source

                    for (var i = 1; i < subdivision_points_for_edge[e_idx].length; i++) {
                        var old_segment_length = euclidean_distance(subdivision_points_for_edge[e_idx][i], subdivision_points_for_edge[e_idx][i - 1]);

                        while (old_segment_length > current_segment_length) {
                            var percent_position = current_segment_length / old_segment_length;
                            var new_subdivision_point_x = subdivision_points_for_edge[e_idx][i - 1].x;
                            var new_subdivision_point_y = subdivision_points_for_edge[e_idx][i - 1].y;

                            new_subdivision_point_x += percent_position * (subdivision_points_for_edge[e_idx][i].x - subdivision_points_for_edge[e_idx][i - 1].x);
                            new_subdivision_point_y += percent_position * (subdivision_points_for_edge[e_idx][i].y - subdivision_points_for_edge[e_idx][i - 1].y);
                            new_subdivision_points.push({
                                'x': new_subdivision_point_x,
                                'y': new_subdivision_point_y
                            });

                            old_segment_length -= current_segment_length;
                            current_segment_length = segment_length;
                        }
                        current_segment_length -= old_segment_length;
                    }
                    new_subdivision_points.push(data_nodes[data_edges[e_idx].target]); //target
                    subdivision_points_for_edge[e_idx] = new_subdivision_points;
                }
            }
        }
        /*** ********************** ***/

        /*** Edge compatibility measures ***/
        function angle_compatibility(P, Q) {
            var result = Math.abs(vector_dot_product(edge_as_vector(P), edge_as_vector(Q)) / (edge_length(P) * edge_length(Q)));
            return result;
        }

        function scale_compatibility(P, Q) {
            var lavg = (edge_length(P) + edge_length(Q)) / 2.0;
            var result = 2.0 / (lavg / Math.min(edge_length(P), edge_length(Q)) + Math.max(edge_length(P), edge_length(Q)) / lavg);
            return result;
        }

        function position_compatibility(P, Q) {
            var lavg = (edge_length(P) + edge_length(Q)) / 2.0;
            var midP = {
                'x': (data_nodes[P.source].x + data_nodes[P.target].x) / 2.0,
                'y': (data_nodes[P.source].y + data_nodes[P.target].y) / 2.0
            };
            var midQ = {
                'x': (data_nodes[Q.source].x + data_nodes[Q.target].x) / 2.0,
                'y': (data_nodes[Q.source].y + data_nodes[Q.target].y) / 2.0
            };
            var result = lavg / (lavg + euclidean_distance(midP, midQ));
            return result;
        }

        function edge_visibility(P, Q) {
            var I0 = project_point_on_line(data_nodes[Q.source], {
                'source': data_nodes[P.source],
                'target': data_nodes[P.target]
            });
            var I1 = project_point_on_line(data_nodes[Q.target], {
                'source': data_nodes[P.source],
                'target': data_nodes[P.target]
            }); //send acutal edge points positions
            var midI = {
                'x': (I0.x + I1.x) / 2.0,
                'y': (I0.y + I1.y) / 2.0
            };
            var midP = {
                'x': (data_nodes[P.source].x + data_nodes[P.target].x) / 2.0,
                'y': (data_nodes[P.source].y + data_nodes[P.target].y) / 2.0
            };
            var result = Math.max(0, 1 - 2 * euclidean_distance(midP, midI) / euclidean_distance(I0, I1));
            return result;
        }

        function visibility_compatibility(P, Q) {
            return Math.min(edge_visibility(P, Q), edge_visibility(Q, P));
        }

        function compatibility_score(P, Q) {
            var result = angle_compatibility(P, Q) * scale_compatibility(P, Q) * position_compatibility(P, Q) * visibility_compatibility(P, Q);

            return result;
        }

        function are_compatible(P, Q) {
            // console.log('compatibility ' + P.source +' - '+ P.target + ' and ' + Q.source +' '+ Q.target);
            return compatibility_score(P, Q) >= compatibility_threshold;
        }

        function compute_compatibility_lists() {
            for (var e = 0; e < data_edges.length - 1; e++) {
                for (var oe = e + 1; oe < data_edges.length; oe++) {
                    // don't want any duplicates
                    if (e == oe) continue;
                    else {
                        if (are_compatible(data_edges[e], data_edges[oe])) {
                            compatibility_list_for_edge[e].push(oe);
                            compatibility_list_for_edge[oe].push(e);
                        }
                    }
                }
            }
        }

        /*** ************************ ***/

        /*** Main Bundling Loop Methods ***/
        var forcebundle = function forcebundle() {
            var S = S_initial;
            var I = I_initial;
            var P = P_initial;

            initialize_edge_subdivisions();
            initialize_compatibility_lists();
            update_edge_divisions(P);
            compute_compatibility_lists();
            for (var cycle = 0; cycle < C; cycle++) {
                for (var iteration = 0; iteration < I; iteration++) {
                    var forces = [];
                    for (var edge = 0; edge < data_edges.length; edge++) {
                        forces[edge] = apply_resulting_forces_on_subdivision_points(edge, P, S);
                    }
                    for (var e = 0; e < data_edges.length; e++) {
                        for (var i = 0; i < P + 1; i++) {
                            subdivision_points_for_edge[e][i].x += forces[e][i].x;
                            subdivision_points_for_edge[e][i].y += forces[e][i].y;
                        }
                    }
                }
                //prepare for next cycle
                S = S / 2;
                P = P * 2;
                I = I_rate * I;

                update_edge_divisions(P);
                // console.log('C' + cycle);
                // console.log('P' + P);
                // console.log('S' + S);
            }
            return subdivision_points_for_edge;
        };
        /*** ************************ ***/

        /*** Getters/Setters Methods ***/
        forcebundle.nodes = function(nl) {
            if (arguments.length == 0) {
                return data_nodes;
            } else {
                data_nodes = nl;
            }
            return forcebundle;
        };

        forcebundle.edges = function(ll) {
            if (arguments.length == 0) {
                return data_edges;
            } else {
                data_edges = filter_self_loops(ll); //remove edges to from to the same point
            }
            return forcebundle;
        };

        forcebundle.bundling_stiffness = function(k) {
            if (arguments.length == 0) {
                return K;
            } else {
                K = k;
            }
            return forcebundle;
        };

        forcebundle.step_size = function(step) {
            if (arguments.length == 0) {
                return S_initial;
            } else {
                S_initial = step;
            }
            return forcebundle;
        };

        forcebundle.cycles = function(c) {
            if (arguments.length == 0) {
                return C;
            } else {
                C = c;
            }
            return forcebundle;
        };

        forcebundle.iterations = function(i) {
            if (arguments.length == 0) {
                return I_initial;
            } else {
                I_initial = i;
            }
            return forcebundle;
        };

        forcebundle.iterations_rate = function(i) {
            if (arguments.length == 0) {
                return I_rate;
            } else {
                I_rate = i;
            }
            return forcebundle;
        };

        forcebundle.subdivision_points_seed = function(p) {
            if (arguments.length == 0) {
                return P;
            } else {
                P = p;
            }
            return forcebundle;
        };

        forcebundle.subdivision_rate = function(r) {
            if (arguments.length == 0) {
                return P_rate;
            } else {
                P_rate = r;
            }
            return forcebundle;
        };

        forcebundle.compatbility_threshold = function(t) {
            if (arguments.length == 0) {
                return compatbility_threshold;
            } else {
                compatibility_threshold = t;
            }
            return forcebundle;
        };

        /*** ************************ ***/

        return forcebundle;
    };

    /**
     * @author kyle / http://nikai.us/
     */

    /**
     * Category
     * @param {Object} splitList:
     *   { 
     *       other: 1,
     *       1: 2,
     *       2: 3,
     *       3: 4,
     *       4: 5,
     *       5: 6,
     *       6: 7
     *   }
     */
    function Category(splitList) {
        this.splitList = splitList || {
            other: 1
        };
    }

    Category.prototype.get = function(count) {

        var splitList = this.splitList;

        var value = splitList['other'];

        for (var i in splitList) {
            if (count == i) {
                value = splitList[i];
                break;
            }
        }

        return value;
    };

    /**
     * 根据DataSet自动生成对应的splitList
     */
    Category.prototype.generateByDataSet = function(dataSet) {
        var colors = ['rgba(255, 255, 0, 0.8)', 'rgba(253, 98, 104, 0.8)', 'rgba(255, 146, 149, 0.8)', 'rgba(255, 241, 193, 0.8)', 'rgba(110, 176, 253, 0.8)', 'rgba(52, 139, 251, 0.8)', 'rgba(17, 102, 252, 0.8)'];
        var data = dataSet.get();
        this.splitList = {};
        var count = 0;
        for (var i = 0; i < data.length; i++) {
            if (this.splitList[data[i].count] === undefined) {
                this.splitList[data[i].count] = colors[count];
                count++;
            }
            if (count >= colors.length - 1) {
                break;
            }
        }

        this.splitList['other'] = colors[colors.length - 1];
    };

    /**
     * @author kyle / http://nikai.us/
     */

    /**
     * Choropleth
     * @param {Object} splitList:
     *       [
     *           {
     *               start: 0,
     *               end: 2,
     *               value: randomColor()
     *           },{
     *               start: 2,
     *               end: 4,
     *               value: randomColor()
     *           },{
     *               start: 4,
     *               value: randomColor()
     *           }
     *       ];
     *
     */
    function Choropleth(splitList) {
        this.splitList = splitList || [{
            start: 0,
            value: 'red'
        }];
    }

    Choropleth.prototype.get = function(count) {
        var splitList = this.splitList;

        var value = false;

        for (var i = 0; i < splitList.length; i++) {
            if ((splitList[i].start === undefined || splitList[i].start !== undefined && count >= splitList[i].start) && (splitList[i].end === undefined || splitList[i].end !== undefined && count < splitList[i].end)) {
                value = splitList[i].value;
                break;
            }
        }

        return value;
    };

    /**
     * 根据DataSet自动生成对应的splitList
     */
    Choropleth.prototype.generateByDataSet = function(dataSet) {

        var min = dataSet.getMin('count');
        var max = dataSet.getMax('count');

        this.generateByMinMax(min, max);
    };

    /**
     * 根据DataSet自动生成对应的splitList
     */
    Choropleth.prototype.generateByMinMax = function(min, max) {
        var colors = ['rgba(255, 255, 0, 0.8)', 'rgba(253, 98, 104, 0.8)', 'rgba(255, 146, 149, 0.8)', 'rgba(255, 241, 193, 0.8)', 'rgba(110, 176, 253, 0.8)', 'rgba(52, 139, 251, 0.8)', 'rgba(17, 102, 252, 0.8)'];
        var splitNum = (max - min) / 7;
        var index = min;
        this.splitList = [];
        var count = 0;
        while (index < max) {
            this.splitList.push({
                start: index,
                end: index + splitNum,
                value: colors[count]
            });
            count++;
            index += splitNum;
        }
    };

    /**
     * @author Mofei<http://www.zhuwenlong.com>
     */

    var MapHelper = function() {
        function MapHelper(id, type, opt) {
            classCallCheck(this, MapHelper);

            if (!id || !type) {
                console.warn('id 和 type 为必填项');
                return false;
            }

            if (type == 'baidu') {
                if (!BMap) {
                    console.warn('请先引入百度地图JS API');
                    return false;
                }
            } else {
                console.warn('暂不支持你的地图类型');
            }
            this.type = type;
            var center = opt && opt.center ? opt.center : [106.962497, 38.208726];
            var zoom = opt && opt.zoom ? opt.zoom : 5;
            var map = this.map = new BMap.Map(id, {
                enableMapClick: false
            });
            map.centerAndZoom(new BMap.Point(center[0], center[1]), zoom);
            map.enableScrollWheelZoom(true);

            map.setMapStyle({
                style: 'light'
            });
        }

        createClass(MapHelper, [{
            key: 'addLayer',
            value: function addLayer(datas, options) {
                if (this.type == 'baidu') {
                    return new mapv.baiduMapLayer(this.map, dataSet, options);
                }
            }
        }, {
            key: 'getMap',
            value: function getMap() {
                return this.map;
            }
        }]);
        return MapHelper;
    }();

    /**
     * 一直覆盖在当前地图视野的Canvas对象
     *
     * @author nikai (@胖嘟嘟的骨头, nikai@baidu.com)
     *
     * @param 
     * {
     *     map 地图实例对象
     * }
     */

    function CanvasLayer(options) {
        this.options = options || {};
        this.paneName = this.options.paneName || 'mapPane';
        this.context = this.options.context || '2d';
        this.zIndex = this.options.zIndex || 0;
        this.mixBlendMode = this.options.mixBlendMode || null;
        this.enableMassClear = this.options.enableMassClear;
        this._map = options.map;
        this._lastDrawTime = null;
        this.show();
    }

    var global$3 = typeof window === 'undefined' ? {} : window;

    if (global$3.BMap) {

        CanvasLayer.prototype = new BMap.Overlay();

        CanvasLayer.prototype.initialize = function(map) {
            this._map = map;
            var canvas = this.canvas = document.createElement("canvas");
            canvas.style.cssText = "position:absolute;" + "left:0;" + "top:0;" + "z-index:" + this.zIndex + ";user-select:none;";
            canvas.style.mixBlendMode = this.mixBlendMode;
            this.adjustSize();
            map.getPanes()[this.paneName].appendChild(canvas);
            var that = this;
            map.addEventListener('resize', function() {
                that.adjustSize();
                that._draw();
            });
            return this.canvas;
        };

        CanvasLayer.prototype.adjustSize = function() {
            var size = this._map.getSize();
            var canvas = this.canvas;

            var devicePixelRatio = this.devicePixelRatio = global$3.devicePixelRatio;

            canvas.width = size.width * devicePixelRatio;
            canvas.height = size.height * devicePixelRatio;
            if (this.context == '2d') {
                canvas.getContext(this.context).scale(devicePixelRatio, devicePixelRatio);
            }

            canvas.style.width = size.width + "px";
            canvas.style.height = size.height + "px";
        };

        CanvasLayer.prototype.draw = function() {
            var self = this;
            clearTimeout(self.timeoutID);
            self.timeoutID = setTimeout(function() {
                self._draw();
            }, 15);
        };

        CanvasLayer.prototype._draw = function() {
            var map = this._map;
            var size = map.getSize();
            var center = map.getCenter();
            if (center) {
                var pixel = map.pointToOverlayPixel(center);
                this.canvas.style.left = pixel.x - size.width / 2 + 'px';
                this.canvas.style.top = pixel.y - size.height / 2 + 'px';
                this.dispatchEvent('draw');
                this.options.update && this.options.update.call(this);
            }
        };

        CanvasLayer.prototype.getContainer = function() {
            return this.canvas;
        };

        CanvasLayer.prototype.show = function() {
            if (!this.canvas) {
                this._map.addOverlay(this);
            }
            this.canvas.style.display = "block";
        };

        CanvasLayer.prototype.hide = function() {
            this.canvas.style.display = "none";
            //this._map.removeOverlay(this);
        };

        CanvasLayer.prototype.setZIndex = function(zIndex) {
            this.canvas.style.zIndex = zIndex;
        };

        CanvasLayer.prototype.getZIndex = function() {
            return this.zIndex;
        };
    }

    /**
     * Tween.js - Licensed under the MIT license
     * https://github.com/tweenjs/tween.js
     * ----------------------------------------------
     *
     * See https://github.com/tweenjs/tween.js/graphs/contributors for the full list of contributors.
     * Thank you all, you're awesome!
     */

    var TWEEN = TWEEN || function() {

        var _tweens = [];

        return {

            getAll: function getAll() {

                return _tweens;
            },

            removeAll: function removeAll() {

                _tweens = [];
            },

            add: function add(tween) {

                _tweens.push(tween);
            },

            remove: function remove(tween) {

                var i = _tweens.indexOf(tween);

                if (i !== -1) {
                    _tweens.splice(i, 1);
                }
            },

            update: function update(time, preserve) {

                if (_tweens.length === 0) {
                    return false;
                }

                var i = 0;

                time = time !== undefined ? time : TWEEN.now();

                while (i < _tweens.length) {

                    if (_tweens[i].update(time) || preserve) {
                        i++;
                    } else {
                        _tweens.splice(i, 1);
                    }
                }

                return true;
            }
        };
    }();

    // Include a performance.now polyfill.
    // In node.js, use process.hrtime.
    if (typeof window === 'undefined' && typeof process !== 'undefined') {
        TWEEN.now = function() {
            var time = process.hrtime();

            // Convert [seconds, nanoseconds] to milliseconds.
            return time[0] * 1000 + time[1] / 1000000;
        };
    }
    // In a browser, use window.performance.now if it is available.
    else if (typeof window !== 'undefined' && window.performance !== undefined && window.performance.now !== undefined) {
        // This must be bound, because directly assigning this function
        // leads to an invocation exception in Chrome.
        TWEEN.now = window.performance.now.bind(window.performance);
    }
    // Use Date.now if it is available.
    else if (Date.now !== undefined) {
        TWEEN.now = Date.now;
    }
    // Otherwise, use 'new Date().getTime()'.
    else {
        TWEEN.now = function() {
            return new Date().getTime();
        };
    }

    TWEEN.Tween = function(object) {

        var _object = object;
        var _valuesStart = {};
        var _valuesEnd = {};
        var _valuesStartRepeat = {};
        var _duration = 1000;
        var _repeat = 0;
        var _repeatDelayTime;
        var _yoyo = false;
        var _isPlaying = false;
        var _reversed = false;
        var _delayTime = 0;
        var _startTime = null;
        var _easingFunction = TWEEN.Easing.Linear.None;
        var _interpolationFunction = TWEEN.Interpolation.Linear;
        var _chainedTweens = [];
        var _onStartCallback = null;
        var _onStartCallbackFired = false;
        var _onUpdateCallback = null;
        var _onCompleteCallback = null;
        var _onStopCallback = null;

        this.to = function(properties, duration) {

            _valuesEnd = properties;

            if (duration !== undefined) {
                _duration = duration;
            }

            return this;
        };

        this.start = function(time) {

            TWEEN.add(this);

            _isPlaying = true;

            _onStartCallbackFired = false;

            _startTime = time !== undefined ? time : TWEEN.now();
            _startTime += _delayTime;

            for (var property in _valuesEnd) {

                // Check if an Array was provided as property value
                if (_valuesEnd[property] instanceof Array) {

                    if (_valuesEnd[property].length === 0) {
                        continue;
                    }

                    // Create a local copy of the Array with the start value at the front
                    _valuesEnd[property] = [_object[property]].concat(_valuesEnd[property]);
                }

                // If `to()` specifies a property that doesn't exist in the source object,
                // we should not set that property in the object
                if (_object[property] === undefined) {
                    continue;
                }

                // Save the starting value.
                _valuesStart[property] = _object[property];

                if (_valuesStart[property] instanceof Array === false) {
                    _valuesStart[property] *= 1.0; // Ensures we're using numbers, not strings
                }

                _valuesStartRepeat[property] = _valuesStart[property] || 0;
            }

            return this;
        };

        this.stop = function() {

            if (!_isPlaying) {
                return this;
            }

            TWEEN.remove(this);
            _isPlaying = false;

            if (_onStopCallback !== null) {
                _onStopCallback.call(_object, _object);
            }

            this.stopChainedTweens();
            return this;
        };

        this.end = function() {

            this.update(_startTime + _duration);
            return this;
        };

        this.stopChainedTweens = function() {

            for (var i = 0, numChainedTweens = _chainedTweens.length; i < numChainedTweens; i++) {
                _chainedTweens[i].stop();
            }
        };

        this.delay = function(amount) {

            _delayTime = amount;
            return this;
        };

        this.repeat = function(times) {

            _repeat = times;
            return this;
        };

        this.repeatDelay = function(amount) {

            _repeatDelayTime = amount;
            return this;
        };

        this.yoyo = function(yoyo) {

            _yoyo = yoyo;
            return this;
        };

        this.easing = function(easing) {

            _easingFunction = easing;
            return this;
        };

        this.interpolation = function(interpolation) {

            _interpolationFunction = interpolation;
            return this;
        };

        this.chain = function() {

            _chainedTweens = arguments;
            return this;
        };

        this.onStart = function(callback) {

            _onStartCallback = callback;
            return this;
        };

        this.onUpdate = function(callback) {

            _onUpdateCallback = callback;
            return this;
        };

        this.onComplete = function(callback) {

            _onCompleteCallback = callback;
            return this;
        };

        this.onStop = function(callback) {

            _onStopCallback = callback;
            return this;
        };

        this.update = function(time) {

            var property;
            var elapsed;
            var value;

            if (time < _startTime) {
                return true;
            }

            if (_onStartCallbackFired === false) {

                if (_onStartCallback !== null) {
                    _onStartCallback.call(_object, _object);
                }

                _onStartCallbackFired = true;
            }

            elapsed = (time - _startTime) / _duration;
            elapsed = elapsed > 1 ? 1 : elapsed;

            value = _easingFunction(elapsed);

            for (property in _valuesEnd) {

                // Don't update properties that do not exist in the source object
                if (_valuesStart[property] === undefined) {
                    continue;
                }

                var start = _valuesStart[property] || 0;
                var end = _valuesEnd[property];

                if (end instanceof Array) {

                    _object[property] = _interpolationFunction(end, value);
                } else {

                    // Parses relative end values with start as base (e.g.: +10, -3)
                    if (typeof end === 'string') {

                        if (end.charAt(0) === '+' || end.charAt(0) === '-') {
                            end = start + parseFloat(end);
                        } else {
                            end = parseFloat(end);
                        }
                    }

                    // Protect against non numeric properties.
                    if (typeof end === 'number') {
                        _object[property] = start + (end - start) * value;
                    }
                }
            }

            if (_onUpdateCallback !== null) {
                _onUpdateCallback.call(_object, value);
            }

            if (elapsed === 1) {

                if (_repeat > 0) {

                    if (isFinite(_repeat)) {
                        _repeat--;
                    }

                    // Reassign starting values, restart by making startTime = now
                    for (property in _valuesStartRepeat) {

                        if (typeof _valuesEnd[property] === 'string') {
                            _valuesStartRepeat[property] = _valuesStartRepeat[property] + parseFloat(_valuesEnd[property]);
                        }

                        if (_yoyo) {
                            var tmp = _valuesStartRepeat[property];

                            _valuesStartRepeat[property] = _valuesEnd[property];
                            _valuesEnd[property] = tmp;
                        }

                        _valuesStart[property] = _valuesStartRepeat[property];
                    }

                    if (_yoyo) {
                        _reversed = !_reversed;
                    }

                    if (_repeatDelayTime !== undefined) {
                        _startTime = time + _repeatDelayTime;
                    } else {
                        _startTime = time + _delayTime;
                    }

                    return true;
                } else {

                    if (_onCompleteCallback !== null) {

                        _onCompleteCallback.call(_object, _object);
                    }

                    for (var i = 0, numChainedTweens = _chainedTweens.length; i < numChainedTweens; i++) {
                        // Make the chained tweens start exactly at the time they should,
                        // even if the `update()` method was called way past the duration of the tween
                        _chainedTweens[i].start(_startTime + _duration);
                    }

                    return false;
                }
            }

            return true;
        };
    };

    TWEEN.Easing = {

        Linear: {

            None: function None(k) {

                return k;
            }

        },

        Quadratic: {

            In: function In(k) {

                return k * k;
            },

            Out: function Out(k) {

                return k * (2 - k);
            },

            InOut: function InOut(k) {

                if ((k *= 2) < 1) {
                    return 0.5 * k * k;
                }

                return -0.5 * (--k * (k - 2) - 1);
            }

        },

        Cubic: {

            In: function In(k) {

                return k * k * k;
            },

            Out: function Out(k) {

                return --k * k * k + 1;
            },

            InOut: function InOut(k) {

                if ((k *= 2) < 1) {
                    return 0.5 * k * k * k;
                }

                return 0.5 * ((k -= 2) * k * k + 2);
            }

        },

        Quartic: {

            In: function In(k) {

                return k * k * k * k;
            },

            Out: function Out(k) {

                return 1 - --k * k * k * k;
            },

            InOut: function InOut(k) {

                if ((k *= 2) < 1) {
                    return 0.5 * k * k * k * k;
                }

                return -0.5 * ((k -= 2) * k * k * k - 2);
            }

        },

        Quintic: {

            In: function In(k) {

                return k * k * k * k * k;
            },

            Out: function Out(k) {

                return --k * k * k * k * k + 1;
            },

            InOut: function InOut(k) {

                if ((k *= 2) < 1) {
                    return 0.5 * k * k * k * k * k;
                }

                return 0.5 * ((k -= 2) * k * k * k * k + 2);
            }

        },

        Sinusoidal: {

            In: function In(k) {

                return 1 - Math.cos(k * Math.PI / 2);
            },

            Out: function Out(k) {

                return Math.sin(k * Math.PI / 2);
            },

            InOut: function InOut(k) {

                return 0.5 * (1 - Math.cos(Math.PI * k));
            }

        },

        Exponential: {

            In: function In(k) {

                return k === 0 ? 0 : Math.pow(1024, k - 1);
            },

            Out: function Out(k) {

                return k === 1 ? 1 : 1 - Math.pow(2, -10 * k);
            },

            InOut: function InOut(k) {

                if (k === 0) {
                    return 0;
                }

                if (k === 1) {
                    return 1;
                }

                if ((k *= 2) < 1) {
                    return 0.5 * Math.pow(1024, k - 1);
                }

                return 0.5 * (-Math.pow(2, -10 * (k - 1)) + 2);
            }

        },

        Circular: {

            In: function In(k) {

                return 1 - Math.sqrt(1 - k * k);
            },

            Out: function Out(k) {

                return Math.sqrt(1 - --k * k);
            },

            InOut: function InOut(k) {

                if ((k *= 2) < 1) {
                    return -0.5 * (Math.sqrt(1 - k * k) - 1);
                }

                return 0.5 * (Math.sqrt(1 - (k -= 2) * k) + 1);
            }

        },

        Elastic: {

            In: function In(k) {

                if (k === 0) {
                    return 0;
                }

                if (k === 1) {
                    return 1;
                }

                return -Math.pow(2, 10 * (k - 1)) * Math.sin((k - 1.1) * 5 * Math.PI);
            },

            Out: function Out(k) {

                if (k === 0) {
                    return 0;
                }

                if (k === 1) {
                    return 1;
                }

                return Math.pow(2, -10 * k) * Math.sin((k - 0.1) * 5 * Math.PI) + 1;
            },

            InOut: function InOut(k) {

                if (k === 0) {
                    return 0;
                }

                if (k === 1) {
                    return 1;
                }

                k *= 2;

                if (k < 1) {
                    return -0.5 * Math.pow(2, 10 * (k - 1)) * Math.sin((k - 1.1) * 5 * Math.PI);
                }

                return 0.5 * Math.pow(2, -10 * (k - 1)) * Math.sin((k - 1.1) * 5 * Math.PI) + 1;
            }

        },

        Back: {

            In: function In(k) {

                var s = 1.70158;

                return k * k * ((s + 1) * k - s);
            },

            Out: function Out(k) {

                var s = 1.70158;

                return --k * k * ((s + 1) * k + s) + 1;
            },

            InOut: function InOut(k) {

                var s = 1.70158 * 1.525;

                if ((k *= 2) < 1) {
                    return 0.5 * (k * k * ((s + 1) * k - s));
                }

                return 0.5 * ((k -= 2) * k * ((s + 1) * k + s) + 2);
            }

        },

        Bounce: {

            In: function In(k) {

                return 1 - TWEEN.Easing.Bounce.Out(1 - k);
            },

            Out: function Out(k) {

                if (k < 1 / 2.75) {
                    return 7.5625 * k * k;
                } else if (k < 2 / 2.75) {
                    return 7.5625 * (k -= 1.5 / 2.75) * k + 0.75;
                } else if (k < 2.5 / 2.75) {
                    return 7.5625 * (k -= 2.25 / 2.75) * k + 0.9375;
                } else {
                    return 7.5625 * (k -= 2.625 / 2.75) * k + 0.984375;
                }
            },

            InOut: function InOut(k) {

                if (k < 0.5) {
                    return TWEEN.Easing.Bounce.In(k * 2) * 0.5;
                }

                return TWEEN.Easing.Bounce.Out(k * 2 - 1) * 0.5 + 0.5;
            }

        }

    };

    TWEEN.Interpolation = {

        Linear: function Linear(v, k) {

            var m = v.length - 1;
            var f = m * k;
            var i = Math.floor(f);
            var fn = TWEEN.Interpolation.Utils.Linear;

            if (k < 0) {
                return fn(v[0], v[1], f);
            }

            if (k > 1) {
                return fn(v[m], v[m - 1], m - f);
            }

            return fn(v[i], v[i + 1 > m ? m : i + 1], f - i);
        },

        Bezier: function Bezier(v, k) {

            var b = 0;
            var n = v.length - 1;
            var pw = Math.pow;
            var bn = TWEEN.Interpolation.Utils.Bernstein;

            for (var i = 0; i <= n; i++) {
                b += pw(1 - k, n - i) * pw(k, i) * v[i] * bn(n, i);
            }

            return b;
        },

        CatmullRom: function CatmullRom(v, k) {

            var m = v.length - 1;
            var f = m * k;
            var i = Math.floor(f);
            var fn = TWEEN.Interpolation.Utils.CatmullRom;

            if (v[0] === v[m]) {

                if (k < 0) {
                    i = Math.floor(f = m * (1 + k));
                }

                return fn(v[(i - 1 + m) % m], v[i], v[(i + 1) % m], v[(i + 2) % m], f - i);
            } else {

                if (k < 0) {
                    return v[0] - (fn(v[0], v[0], v[1], v[1], -f) - v[0]);
                }

                if (k > 1) {
                    return v[m] - (fn(v[m], v[m], v[m - 1], v[m - 1], f - m) - v[m]);
                }

                return fn(v[i ? i - 1 : 0], v[i], v[m < i + 1 ? m : i + 1], v[m < i + 2 ? m : i + 2], f - i);
            }
        },

        Utils: {

            Linear: function Linear(p0, p1, t) {

                return (p1 - p0) * t + p0;
            },

            Bernstein: function Bernstein(n, i) {

                var fc = TWEEN.Interpolation.Utils.Factorial;

                return fc(n) / fc(i) / fc(n - i);
            },

            Factorial: function() {

                var a = [1];

                return function(n) {

                    var s = 1;

                    if (a[n]) {
                        return a[n];
                    }

                    for (var i = n; i > 1; i--) {
                        s *= i;
                    }

                    a[n] = s;
                    return s;
                };
            }(),

            CatmullRom: function CatmullRom(p0, p1, p2, p3, t) {

                var v0 = (p2 - p0) * 0.5;
                var v1 = (p3 - p1) * 0.5;
                var t2 = t * t;
                var t3 = t * t2;

                return (2 * p1 - 2 * p2 + v0 + v1) * t3 + (-3 * p1 + 3 * p2 - 2 * v0 - v1) * t2 + v0 * t + p1;
            }

        }

    };

    /**
     * @author Mofei Zhu<mapv@zhuwenlong.com>
     * This file is to draw text
     */

    var drawText = {
        draw: function draw(context, dataSet, options) {

            var data = dataSet instanceof DataSet ? dataSet.get() : dataSet;
            context.save();

            // set from options
            for (var key in options) {
                context[key] = options[key];
            }

            var offset = options.offset || {
                x: 0,
                y: 0
            };

            var rects = [];

            var size = options._size || options.size;
            if (size) {
                context.font = "bold " + size + "px Arial";
            } else {
                size = 12;
            }

            var textKey = options.textKey || 'text';

            context.textAlign = 'center';
            context.textBaseline = 'middle';

            if (options.avoid) {
                // 标注避让
                for (var i = 0, len = data.length; i < len; i++) {
                    var coordinates = data[i].geometry._coordinates || data[i].geometry.coordinates;
                    var x = coordinates[0] + offset.x;
                    var y = coordinates[1] + offset.y;
                    var text = data[i][textKey];
                    var textWidth = context.measureText(text).width;

                    // 根据文本宽度和高度调整x，y位置，使得绘制文本时候坐标点在文本中心点，这个计算出的是左上角坐标
                    var px = x - textWidth / 2;
                    var py = y - size / 2;

                    var rect = {
                        sw: {
                            x: px,
                            y: py + size
                        },
                        ne: {
                            x: px + textWidth,
                            y: py
                        }
                    };

                    if (!hasOverlay(rects, rect)) {
                        rects.push(rect);
                        px = px + textWidth / 2;
                        py = py + size / 2;
                        context.fillText(text, px, py);
                    }
                }
            } else {
                for (var i = 0, len = data.length; i < len; i++) {
                    var coordinates = data[i].geometry._coordinates || data[i].geometry.coordinates;
                    var x = coordinates[0] + offset.x;
                    var y = coordinates[1] + offset.y;
                    var text = data[i][textKey];
                    context.fillText(text, x, y);
                }
            }

            context.restore();
        }

    };

    /*
     *  当前文字区域和已有的文字区域是否有重叠部分
     */
    function hasOverlay(rects, overlay) {
        for (var i = 0; i < rects.length; i++) {
            if (isRectOverlay(rects[i], overlay)) {
                return true;
            }
        }
        return false;
    }

    //判断2个矩形是否有重叠部分
    function isRectOverlay(rect1, rect2) {
        //minx、miny 2个矩形右下角最小的x和y
        //maxx、maxy 2个矩形左上角最大的x和y
        var minx = Math.min(rect1.ne.x, rect2.ne.x);
        var miny = Math.min(rect1.sw.y, rect2.sw.y);
        var maxx = Math.max(rect1.sw.x, rect2.sw.x);
        var maxy = Math.max(rect1.ne.y, rect2.ne.y);
        if (minx > maxx && miny > maxy) {
            return true;
        }
        return false;
    }

    /**
     * @author Mofei Zhu<mapv@zhuwenlong.com>
     * This file is to draw text
     */

    var drawIcon = {
        draw: function draw(context, dataSet, options) {
            var data = dataSet instanceof DataSet ? dataSet.get() : dataSet;

            context.fillStyle = 'white';
            context.textAlign = 'center';
            context.textBaseline = 'middle';

            var offset = options.offset || {
                x: 0,
                y: 0
            };

            // set from options
            // for (var key in options) {
            //     context[key] = options[key];
            // }
            // console.log(data)
            for (var i = 0, len = data.length; i < len; i++) {

                if (data[i].geometry) {
                    var deg = data[i].deg || options.deg;
                    var icon = data[i].icon || options.icon;
                    var coordinates = data[i].geometry._coordinates || data[i].geometry.coordinates;
                    var x = coordinates[0];
                    var y = coordinates[1];
                    if (deg) {
                        context.save();
                        context.translate(x, y);
                        context.rotate(deg * Math.PI / 180);
                        context.translate(-x, -y);
                    }
                    var width = options._width || options.width || icon.width;
                    var height = options._height || options.height || icon.height;
                    x = x - width / 2 + offset.x;
                    y = y - height / 2 + offset.y;
                    if (options.sx && options.sy && options.swidth && options.sheight && options.width && options.height) {
                        context.drawImage(icon, options.sx, options.sy, options.swidth, options.sheight, x, y, width, height);
                    } else if (options.width && options.height) {
                        context.drawImage(icon, x, y, width, height);
                    } else {
                        context.drawImage(icon, x, y);
                    }

                    if (deg) {
                        context.restore();
                    }
                }
            }
        }
    };

    /**
     * @author kyle / http://nikai.us/
     */

    if (typeof window !== 'undefined') {
        requestAnimationFrame(animate);
    }

    function animate(time) {
        requestAnimationFrame(animate);
        TWEEN.update(time);
    }

    var BaseLayer = function() {
        function BaseLayer(map, dataSet, options) {
            classCallCheck(this, BaseLayer);

            if (!(dataSet instanceof DataSet)) {
                dataSet = new DataSet(dataSet);
            }

            this.dataSet = dataSet;
            this.map = map;
        }

        createClass(BaseLayer, [{
            key: "getDefaultContextConfig",
            value: function getDefaultContextConfig() {
                return {
                    globalAlpha: 1,
                    globalCompositeOperation: 'source-over',
                    imageSmoothingEnabled: true,
                    strokeStyle: '#000000',
                    fillStyle: '#000000',
                    shadowOffsetX: 0,
                    shadowOffsetY: 0,
                    shadowBlur: 0,
                    shadowColor: 'rgba(0, 0, 0, 0)',
                    lineWidth: 1,
                    lineCap: 'butt',
                    lineJoin: 'miter',
                    miterLimit: 10,
                    lineDashOffset: 0,
                    font: '10px sans-serif',
                    textAlign: 'start',
                    textBaseline: 'alphabetic'
                };
            }
        }, {
            key: "initDataRange",
            value: function initDataRange(options) {
                var self = this;

                self.intensity = new Intensity({
                    maxSize: self.options.maxSize,
                    minSize: self.options.minSize,
                    gradient: self.options.gradient,
                    max: self.options.max || this.dataSet.getMax('count')
                });

                self.category = new Category(self.options.splitList);
                self.choropleth = new Choropleth(self.options.splitList);
                if (self.options.splitList === undefined) {
                    self.category.generateByDataSet(this.dataSet);
                }

                if (self.options.splitList === undefined) {
                    var min = self.options.min || this.dataSet.getMin('count');
                    var max = self.options.max || this.dataSet.getMax('count');
                    self.choropleth.generateByMinMax(min, max);
                }
            }
        }, {
            key: "getLegend",
            value: function getLegend(options) {
                var draw = this.options.draw;
                var legend = null;
                if (self.options.draw == 'intensity' || self.options.draw == 'heatmap') {
                    return this.intensity.getLegend(options);
                }
            }
        }, {
            key: "processData",
            value: function processData(data) {
                var self = this;
                var draw = self.options.draw;
                if (draw == 'bubble' || draw == 'intensity' || draw == 'category' || draw == 'choropleth' || draw == 'simple') {

                    for (var i = 0; i < data.length; i++) {
                        var item = data[i];

                        if (self.options.draw == 'bubble') {
                            data[i]._size = self.intensity.getSize(item.count);
                        } else {
                            data[i]._size = undefined;
                        }

                        var styleType = 'fillStyle';

                        if (data[i].geometry.type === 'LineString' || self.options.styleType === 'stroke') {
                            styleType = 'strokeStyle';
                        }

                        if (self.options.draw == 'intensity') {
                            data[i][styleType] = self.intensity.getColor(item.count);
                        } else if (self.options.draw == 'category') {
                            data[i][styleType] = self.category.get(item.count);
                        } else if (self.options.draw == 'choropleth') {
                            data[i][styleType] = self.choropleth.get(item.count);
                        }
                    }
                }
            }
        }, {
            key: "isEnabledTime",
            value: function isEnabledTime() {

                var animationOptions = this.options.animation;

                var flag = animationOptions && !(animationOptions.enabled === false);

                return flag;
            }
        }, {
            key: "argCheck",
            value: function argCheck(options) {
                if (options.draw == 'heatmap') {
                    if (options.strokeStyle) {
                        console.warn('[heatmap] options.strokeStyle is discard, pleause use options.strength [eg: options.strength = 0.1]');
                    }
                }
            }
        }, {
            key: "drawContext",
            value: function drawContext(context, dataSet, options, nwPixel) {
                var self = this;
                switch (self.options.draw) {
                    case 'heatmap':
                        drawHeatmap.draw(context, dataSet, self.options);
                        break;
                    case 'grid':
                    case 'honeycomb':
                        self.options.offset = {
                            x: nwPixel.x,
                            y: nwPixel.y
                        };
                        if (self.options.draw == 'grid') {
                            drawGrid.draw(context, dataSet, self.options);
                        } else {
                            drawHoneycomb.draw(context, dataSet, self.options);
                        }
                        break;
                    case 'text':
                        drawText.draw(context, dataSet, self.options);
                        break;
                    case 'icon':
                        drawIcon.draw(context, dataSet, self.options);
                        break;
                    case 'clip':
                        context.save();
                        context.fillStyle = self.options.fillStyle || 'rgba(0, 0, 0, 0.5)';
                        context.fillRect(0, 0, context.canvas.width, context.canvas.height);
                        drawSimple.draw(context, dataSet, self.options);
                        context.beginPath();
                        pathSimple.drawDataSet(context, dataSet, self.options);
                        context.clip();
                        clear(context);
                        context.restore();
                        break;
                    default:
                        if (self.options.context == "webgl") {
                            webglDrawSimple.draw(self.canvasLayer.canvas.getContext('webgl'), dataSet, self.options);
                        } else {
                            drawSimple.draw(context, dataSet, self.options);
                        }
                }
            }
        }, {
            key: "isPointInPath",
            value: function isPointInPath(context, pixel) {
                var context = this.canvasLayer.canvas.getContext(this.context);
                var data = this.dataSet.get();
                for (var i = 0; i < data.length; i++) {
                    context.beginPath();
                    pathSimple.draw(context, data[i], this.options);
                    if (context.isPointInPath(pixel.x * this.canvasLayer.devicePixelRatio, pixel.y * this.canvasLayer.devicePixelRatio)) {
                        return data[i];
                    }
                }
            }
        }, {
            key: "clickEvent",
            value: function clickEvent(pixel, e) {

                var dataItem = this.isPointInPath(this.getContext(), pixel);

                if (dataItem) {
                    this.options.methods.click(dataItem, e);
                } else {
                    this.options.methods.click(null, e);
                }
            }
        }, {
            key: "mousemoveEvent",
            value: function mousemoveEvent(pixel, e) {
                var dataItem = this.isPointInPath(this.getContext(), pixel);
                if (dataItem) {
                    this.options.methods.mousemove(dataItem, e);
                } else {
                    this.options.methods.mousemove(null, e);
                }
            }

            /**
             * obj.options
             */

        }, {
            key: "update",
            value: function update(obj, isDraw) {
                var self = this;
                var _options = obj.options;
                var options = self.options;
                for (var i in _options) {
                    options[i] = _options[i];
                }
                self.init(options);
                if (isDraw !== false) {
                    self.draw();
                }
            }
        }, {
            key: "setOptions",
            value: function setOptions(options) {
                var self = this;
                self.init(options);
                self.draw();
            }
        }, {
            key: "set",
            value: function set$$1(obj) {
                var self = this;
                var ctx = this.getContext();
                var conf = this.getDefaultContextConfig();
                for (var i in conf) {
                    ctx[i] = conf[i];
                }
                self.init(obj.options);
                self.draw();
            }
        }, {
            key: "destroy",
            value: function destroy() {
                this.unbindEvent();
                this.hide();
            }
        }, {
            key: "initAnimator",
            value: function initAnimator() {
                var self = this;
                var animationOptions = self.options.animation;

                if (self.options.draw == 'time' || self.isEnabledTime()) {

                    if (!animationOptions.stepsRange) {
                        animationOptions.stepsRange = {
                            start: this.dataSet.getMin('time') || 0,
                            end: this.dataSet.getMax('time') || 0
                        };
                    }

                    this.steps = {
                        step: animationOptions.stepsRange.start
                    };
                    self.animator = new TWEEN.Tween(this.steps).onUpdate(function() {
                        self._canvasUpdate(this.step);
                    }).repeat(Infinity);

                    this.addAnimatorEvent();

                    var duration = animationOptions.duration * 1000 || 5000;

                    self.animator.to({
                        step: animationOptions.stepsRange.end
                    }, duration);
                    self.animator.start();
                } else {
                    self.animator && self.animator.stop();
                }
            }
        }, {
            key: "addAnimatorEvent",
            value: function addAnimatorEvent() {}
        }, {
            key: "animatorMovestartEvent",
            value: function animatorMovestartEvent() {
                var animationOptions = this.options.animation;
                if (this.isEnabledTime() && this.animator) {
                    this.steps.step = animationOptions.stepsRange.start;
                    this.animator.stop();
                }
            }
        }, {
            key: "animatorMoveendEvent",
            value: function animatorMoveendEvent() {
                if (this.isEnabledTime() && this.animator) {
                    this.animator.start();
                }
            }
        }]);
        return BaseLayer;
    }();

    var AnimationLayer = function(_BaseLayer) {
        inherits(AnimationLayer, _BaseLayer);

        function AnimationLayer(map, dataSet, options) {
            classCallCheck(this, AnimationLayer);

            var _this = possibleConstructorReturn(this, (AnimationLayer.__proto__ || Object.getPrototypeOf(AnimationLayer)).call(this, map, dataSet, options));

            _this.map = map;
            _this.options = options || {};
            _this.dataSet = dataSet;

            _this.init(options);

            var canvasLayer = new CanvasLayer({
                map: map,
                update: _this._canvasUpdate.bind(_this)
            });
            _this.transferToMercator();
            var self = _this;
            dataSet.on('change', function() {
                self.transferToMercator();
                canvasLayer.draw();
            });
            _this.ctx = canvasLayer.canvas.getContext('2d');

            _this.start();
            return _this;
        }

        createClass(AnimationLayer, [{
            key: "init",
            value: function init(options) {

                var self = this;
                self.options = options;
                this.initDataRange(options);
                this.context = self.options.context || '2d';

                if (self.options.zIndex) {
                    this.canvasLayer && this.canvasLayer.setZIndex(self.options.zIndex);
                }

                if (self.options.max) {
                    this.intensity.setMax(self.options.max);
                }

                if (self.options.min) {
                    this.intensity.setMin(self.options.min);
                }

                this.initAnimator();
            }

            // 经纬度左边转换为墨卡托坐标

        }, {
            key: "transferToMercator",
            value: function transferToMercator() {
                var projection = this.map.getMapType().getProjection();

                if (this.options.coordType !== 'bd09mc') {
                    var data = this.dataSet.get();
                    data = this.dataSet.transferCoordinate(data, function(coordinates) {
                        var pixel = projection.lngLatToPoint({
                            lng: coordinates[0],
                            lat: coordinates[1]
                        });
                        return [pixel.x, pixel.y];
                    }, 'coordinates', 'coordinates_mercator');
                    this.dataSet._set(data);
                }
            }
        }, {
            key: "_canvasUpdate",
            value: function _canvasUpdate() {
                var ctx = this.ctx;
                if (!ctx) {
                    return;
                }
                //clear(ctx);
                var map = this.map;
                var zoomUnit = Math.pow(2, 18 - map.getZoom());
                var projection = map.getMapType().getProjection();

                var mcCenter = projection.lngLatToPoint(map.getCenter());
                var nwMc = new BMap.Pixel(mcCenter.x - map.getSize().width / 2 * zoomUnit, mcCenter.y + map.getSize().height / 2 * zoomUnit); //左上角墨卡托坐标

                clear(ctx);

                var dataGetOptions = {
                    fromColumn: this.options.coordType == 'bd09mc' ? 'coordinates' : 'coordinates_mercator',
                    transferCoordinate: function transferCoordinate(coordinate) {
                        if (!coordinate) {
                            return;
                        }
                        var x = (coordinate[0] - nwMc.x) / zoomUnit;
                        var y = (nwMc.y - coordinate[1]) / zoomUnit;
                        return [x, y];
                    }
                };

                this.data = this.dataSet.get(dataGetOptions);

                this.processData(this.data);

                this.drawAnimation();
            }
        }, {
            key: "drawAnimation",
            value: function drawAnimation() {
                var ctx = this.ctx;
                var data = this.data;
                if (!data) {
                    return;
                }

                ctx.save();
                ctx.globalCompositeOperation = 'destination-out';
                ctx.fillStyle = 'rgba(0, 0, 0, .1)';
                ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height);
                ctx.restore();

                ctx.save();
                if (this.options.shadowColor) {
                    ctx.shadowColor = this.options.shadowColor;
                }

                if (this.options.shadowBlur) {
                    ctx.shadowBlur = this.options.shadowBlur;
                }

                if (this.options.globalAlpha) {
                    ctx.globalAlpha = this.options.globalAlpha;
                }

                if (this.options.globalCompositeOperation) {
                    ctx.globalCompositeOperation = this.options.globalCompositeOperation;
                }

                var options = this.options;
                for (var i = 0; i < data.length; i++) {
                    if (data[i].geometry.type === 'Point') {
                        ctx.beginPath();
                        var maxSize = data[i].size || this.options.size;
                        var minSize = data[i].minSize || this.options.minSize || 0;
                        if (data[i]._size === undefined) {
                            data[i]._size = minSize;
                        }
                        ctx.arc(data[i].geometry._coordinates[0], data[i].geometry._coordinates[1], data[i]._size, 0, Math.PI * 2, true);
                        ctx.closePath();

                        data[i]._size++;

                        if (data[i]._size > maxSize) {
                            data[i]._size = minSize;
                        }
                        ctx.lineWidth = 1;
                        ctx.strokeStyle = data[i].strokeStyle || options.strokeStyle || 'yellow';
                        ctx.stroke();
                        var fillStyle = data[i].fillStyle || options.fillStyle;
                        if (fillStyle) {
                            ctx.fillStyle = fillStyle;
                            ctx.fill();
                        }
                    } else if (data[i].geometry.type === 'LineString') {
                        ctx.beginPath();
                        var size = data[i].size || this.options.size || 5;
                        var minSize = data[i].minSize || this.options.minSize || 0;
                        if (data[i]._index === undefined) {
                            data[i]._index = 0;
                        }
                        var index = data[i]._index;
                        ctx.arc(data[i].geometry._coordinates[index][0], data[i].geometry._coordinates[index][1], size, 0, Math.PI * 2, true);
                        ctx.closePath();

                        data[i]._index++;

                        if (data[i]._index >= data[i].geometry._coordinates.length) {
                            data[i]._index = 0;
                        }

                        ctx.lineWidth = options.lineWidth || 1;
                        var strokeStyle = data[i].strokeStyle || options.strokeStyle;
                        var fillStyle = data[i].fillStyle || options.fillStyle || 'yellow';
                        ctx.fillStyle = fillStyle;
                        ctx.fill();
                        if (strokeStyle) {
                            ctx.strokeStyle = strokeStyle;
                            ctx.stroke();
                        }
                    }
                }
                ctx.restore();
            }
        }, {
            key: "animate",
            value: function animate() {
                this.drawAnimation();
                var animateTime = this.options.animateTime || 100;
                this.timeout = setTimeout(this.animate.bind(this), animateTime);
            }
        }, {
            key: "start",
            value: function start() {
                this.stop();
                this.animate();
            }
        }, {
            key: "stop",
            value: function stop() {
                clearTimeout(this.timeout);
            }
        }]);
        return AnimationLayer;
    }(BaseLayer);

    /**
     * @author kyle / http://nikai.us/
     */

    var Layer = function(_BaseLayer) {
        inherits(Layer, _BaseLayer);

        function Layer(map, dataSet, options) {
            classCallCheck(this, Layer);

            var _this = possibleConstructorReturn(this, (Layer.__proto__ || Object.getPrototypeOf(Layer)).call(this, map, dataSet, options));

            var self = _this;
            var data = null;
            options = options || {};

            self.init(options);
            self.argCheck(options);
            self.transferToMercator();

            var canvasLayer = _this.canvasLayer = new CanvasLayer({
                map: map,
                context: _this.context,
                paneName: options.paneName,
                mixBlendMode: options.mixBlendMode,
                enableMassClear: options.enableMassClear,
                zIndex: options.zIndex,
                update: function update() {
                    self._canvasUpdate();
                }
            });

            dataSet.on('change', function() {
                self.transferToMercator();
                canvasLayer.draw();
            });

            _this.clickEvent = _this.clickEvent.bind(_this);
            _this.mousemoveEvent = _this.mousemoveEvent.bind(_this);
            _this.bindEvent();

            return _this;
        }

        createClass(Layer, [{
            key: "clickEvent",
            value: function clickEvent(e) {
                var pixel = e.pixel;
                get(Layer.prototype.__proto__ || Object.getPrototypeOf(Layer.prototype), "clickEvent", this).call(this, pixel, e);
            }
        }, {
            key: "mousemoveEvent",
            value: function mousemoveEvent(e) {
                var pixel = e.pixel;
                get(Layer.prototype.__proto__ || Object.getPrototypeOf(Layer.prototype), "mousemoveEvent", this).call(this, pixel, e);
            }
        }, {
            key: "bindEvent",
            value: function bindEvent(e) {
                var map = this.map;

                if (this.options.methods) {
                    if (this.options.methods.click) {
                        map.setDefaultCursor("default");
                        map.addEventListener('click', this.clickEvent);
                    }
                    if (this.options.methods.mousemove) {
                        map.addEventListener('mousemove', this.mousemoveEvent);
                    }
                }
            }
        }, {
            key: "unbindEvent",
            value: function unbindEvent(e) {
                var map = this.map;

                if (this.options.methods) {
                    if (this.options.methods.click) {
                        map.removeEventListener('click', this.clickEvent);
                    }
                    if (this.options.methods.mousemove) {
                        map.removeEventListener('mousemove', this.mousemoveEvent);
                    }
                }
            }

            // 经纬度左边转换为墨卡托坐标

        }, {
            key: "transferToMercator",
            value: function transferToMercator() {
                var projection = this.map.getMapType().getProjection();

                if (this.options.coordType !== 'bd09mc') {
                    var data = this.dataSet.get();
                    data = this.dataSet.transferCoordinate(data, function(coordinates) {
                        var pixel = projection.lngLatToPoint({
                            lng: coordinates[0],
                            lat: coordinates[1]
                        });
                        return [pixel.x, pixel.y];
                    }, 'coordinates', 'coordinates_mercator');
                    this.dataSet._set(data);
                }
            }
        }, {
            key: "getContext",
            value: function getContext() {
                return this.canvasLayer.canvas.getContext(this.context);
            }
        }, {
            key: "_canvasUpdate",
            value: function _canvasUpdate(time) {
                if (!this.canvasLayer) {
                    return;
                }

                var self = this;

                var animationOptions = self.options.animation;

                var map = this.canvasLayer._map;

                var zoomUnit = Math.pow(2, 18 - map.getZoom());
                var projection = map.getMapType().getProjection();

                var mcCenter = projection.lngLatToPoint(map.getCenter());
                var nwMc = new BMap.Pixel(mcCenter.x - map.getSize().width / 2 * zoomUnit, mcCenter.y + map.getSize().height / 2 * zoomUnit); //左上角墨卡托坐标

                var context = this.getContext();

                if (self.isEnabledTime()) {
                    if (time === undefined) {
                        clear(context);
                        return;
                    }
                    if (this.context == '2d') {
                        context.save();
                        context.globalCompositeOperation = 'destination-out';
                        context.fillStyle = 'rgba(0, 0, 0, .1)';
                        context.fillRect(0, 0, context.canvas.width, context.canvas.height);
                        context.restore();
                    }
                } else {
                    clear(context);
                }

                if (this.context == '2d') {
                    for (var key in self.options) {
                        context[key] = self.options[key];
                    }
                } else {
                    context.clear(context.COLOR_BUFFER_BIT);
                }

                if (self.options.minZoom && map.getZoom() < self.options.minZoom || self.options.maxZoom && map.getZoom() > self.options.maxZoom) {
                    return;
                }

                var scale = 1;
                if (this.context != '2d') {
                    scale = this.canvasLayer.devicePixelRatio;
                }

                var dataGetOptions = {
                    fromColumn: self.options.coordType == 'bd09mc' ? 'coordinates' : 'coordinates_mercator',
                    transferCoordinate: function transferCoordinate(coordinate) {
                        var x = (coordinate[0] - nwMc.x) / zoomUnit * scale;
                        var y = (nwMc.y - coordinate[1]) / zoomUnit * scale;
                        return [x, y];
                    }
                };

                if (time !== undefined) {
                    dataGetOptions.filter = function(item) {
                        var trails = animationOptions.trails || 10;
                        if (time && item.time > time - trails && item.time < time) {
                            return true;
                        } else {
                            return false;
                        }
                    };
                }

                // get data from data set
                var data = self.dataSet.get(dataGetOptions);

                this.processData(data);

                var nwPixel = map.pointToPixel(new BMap.Point(0, 0));

                if (self.options.unit == 'm') {
                    if (self.options.size) {
                        self.options._size = self.options.size / zoomUnit;
                    }
                    if (self.options.width) {
                        self.options._width = self.options.width / zoomUnit;
                    }
                    if (self.options.height) {
                        self.options._height = self.options.height / zoomUnit;
                    }
                } else {
                    self.options._size = self.options.size;
                    self.options._height = self.options.height;
                    self.options._width = self.options.width;
                }

                this.drawContext(context, data, self.options, nwPixel);

                //console.timeEnd('draw');

                //console.timeEnd('update')
                self.options.updateCallback && self.options.updateCallback(time);
            }
        }, {
            key: "init",
            value: function init(options) {

                var self = this;
                self.options = options;
                this.initDataRange(options);
                this.context = self.options.context || '2d';

                if (self.options.zIndex) {
                    this.canvasLayer && this.canvasLayer.setZIndex(self.options.zIndex);
                }

                if (self.options.max) {
                    this.intensity.setMax(self.options.max);
                }

                if (self.options.min) {
                    this.intensity.setMin(self.options.min);
                }

                this.initAnimator();
            }
        }, {
            key: "addAnimatorEvent",
            value: function addAnimatorEvent() {
                this.map.addEventListener('movestart', this.animatorMovestartEvent.bind(this));
                this.map.addEventListener('moveend', this.animatorMoveendEvent.bind(this));
            }
        }, {
            key: "show",
            value: function show() {
                this.map.addOverlay(this.canvasLayer);
            }
        }, {
            key: "hide",
            value: function hide() {
                this.map.removeOverlay(this.canvasLayer);
            }
        }, {
            key: "draw",
            value: function draw() {
                this.canvasLayer.draw();
            }
        }]);
        return Layer;
    }(BaseLayer);

    /**
     * Copyright 2012 Google Inc. All Rights Reserved.
     *
     * Licensed under the Apache License, Version 2.0 (the "License");
     * you may not use this file except in compliance with the License.
     * You may obtain a copy of the License at
     *
     *     http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */

    /**
     * @fileoverview Extends OverlayView to provide a canvas "Layer".
     * @author Brendan Kenny
     */

    /**
     * A map layer that provides a canvas over the slippy map and a callback
     * system for efficient animation. Requires canvas and CSS 2D transform
     * support.
     * @constructor
     * @extends google.maps.OverlayView
     * @param {CanvasLayerOptions=} opt_options Options to set in this CanvasLayer.
     */
    function CanvasLayer$2(opt_options) {
        /**
         * If true, canvas is in a map pane and the OverlayView is fully functional.
         * See google.maps.OverlayView.onAdd for more information.
         * @type {boolean}
         * @private
         */
        this.isAdded_ = false;

        /**
         * If true, each update will immediately schedule the next.
         * @type {boolean}
         * @private
         */
        this.isAnimated_ = false;

        /**
         * The name of the MapPane in which this layer will be displayed.
         * @type {string}
         * @private
         */
        this.paneName_ = CanvasLayer$2.DEFAULT_PANE_NAME_;

        /**
         * A user-supplied function called whenever an update is required. Null or
         * undefined if a callback is not provided.
         * @type {?function=}
         * @private
         */
        this.updateHandler_ = null;

        /**
         * A user-supplied function called whenever an update is required and the
         * map has been resized since the last update. Null or undefined if a
         * callback is not provided.
         * @type {?function}
         * @private
         */
        this.resizeHandler_ = null;

        /**
         * The LatLng coordinate of the top left of the current view of the map. Will
         * be null when this.isAdded_ is false.
         * @type {google.maps.LatLng}
         * @private
         */
        this.topLeft_ = null;

        /**
         * The map-pan event listener. Will be null when this.isAdded_ is false. Will
         * be null when this.isAdded_ is false.
         * @type {?function}
         * @private
         */
        this.centerListener_ = null;

        /**
         * The map-resize event listener. Will be null when this.isAdded_ is false.
         * @type {?function}
         * @private
         */
        this.resizeListener_ = null;

        /**
         * If true, the map size has changed and this.resizeHandler_ must be called
         * on the next update.
         * @type {boolean}
         * @private
         */
        this.needsResize_ = true;

        /**
         * A browser-defined id for the currently requested callback. Null when no
         * callback is queued.
         * @type {?number}
         * @private
         */
        this.requestAnimationFrameId_ = null;

        var canvas = document.createElement('canvas');
        canvas.style.position = 'absolute';
        canvas.style.top = 0;
        canvas.style.left = 0;
        canvas.style.pointerEvents = 'none';

        /**
         * The canvas element.
         * @type {!HTMLCanvasElement}
         */
        this.canvas = canvas;

        /**
         * The CSS width of the canvas, which may be different than the width of the
         * backing store.
         * @private {number}
         */
        this.canvasCssWidth_ = 300;

        /**
         * The CSS height of the canvas, which may be different than the height of
         * the backing store.
         * @private {number}
         */
        this.canvasCssHeight_ = 150;

        /**
         * A value for scaling the CanvasLayer resolution relative to the CanvasLayer
         * display size.
         * @private {number}
         */
        this.resolutionScale_ = 1;

        /**
         * Simple bind for functions with no args for bind-less browsers (Safari).
         * @param {Object} thisArg The this value used for the target function.
         * @param {function} func The function to be bound.
         */
        function simpleBindShim(thisArg, func) {
            return function() {
                func.apply(thisArg);
            };
        }

        /**
         * A reference to this.repositionCanvas_ with this bound as its this value.
         * @type {function}
         * @private
         */
        this.repositionFunction_ = simpleBindShim(this, this.repositionCanvas_);

        /**
         * A reference to this.resize_ with this bound as its this value.
         * @type {function}
         * @private
         */
        this.resizeFunction_ = simpleBindShim(this, this.resize_);

        /**
         * A reference to this.update_ with this bound as its this value.
         * @type {function}
         * @private
         */
        this.requestUpdateFunction_ = simpleBindShim(this, this.update_);

        // set provided options, if any
        if (opt_options) {
            this.setOptions(opt_options);
        }
    }

    var global$4 = typeof window === 'undefined' ? {} : window;

    if (global$4.google && global$4.google.maps) {

        CanvasLayer$2.prototype = new google.maps.OverlayView();

        /**
         * The default MapPane to contain the canvas.
         * @type {string}
         * @const
         * @private
         */
        CanvasLayer$2.DEFAULT_PANE_NAME_ = 'overlayLayer';

        /**
         * Transform CSS property name, with vendor prefix if required. If browser
         * does not support transforms, property will be ignored.
         * @type {string}
         * @const
         * @private
         */
        CanvasLayer$2.CSS_TRANSFORM_ = function() {
            var div = document.createElement('div');
            var transformProps = ['transform', 'WebkitTransform', 'MozTransform', 'OTransform', 'msTransform'];
            for (var i = 0; i < transformProps.length; i++) {
                var prop = transformProps[i];
                if (div.style[prop] !== undefined) {
                    return prop;
                }
            }

            // return unprefixed version by default
            return transformProps[0];
        }();

        /**
         * The requestAnimationFrame function, with vendor-prefixed or setTimeout-based
         * fallbacks. MUST be called with window as thisArg.
         * @type {function}
         * @param {function} callback The function to add to the frame request queue.
         * @return {number} The browser-defined id for the requested callback.
         * @private
         */
        CanvasLayer$2.prototype.requestAnimFrame_ = global$4.requestAnimationFrame || global$4.webkitRequestAnimationFrame || global$4.mozRequestAnimationFrame || global$4.oRequestAnimationFrame || global$4.msRequestAnimationFrame || function(callback) {
            return global$4.setTimeout(callback, 1000 / 60);
        };

        /**
         * The cancelAnimationFrame function, with vendor-prefixed fallback. Does not
         * fall back to clearTimeout as some platforms implement requestAnimationFrame
         * but not cancelAnimationFrame, and the cost is an extra frame on onRemove.
         * MUST be called with window as thisArg.
         * @type {function}
         * @param {number=} requestId The id of the frame request to cancel.
         * @private
         */
        CanvasLayer$2.prototype.cancelAnimFrame_ = global$4.cancelAnimationFrame || global$4.webkitCancelAnimationFrame || global$4.mozCancelAnimationFrame || global$4.oCancelAnimationFrame || global$4.msCancelAnimationFrame || function(requestId) {};

        /**
         * Sets any options provided. See CanvasLayerOptions for more information.
         * @param {CanvasLayerOptions} options The options to set.
         */
        CanvasLayer$2.prototype.setOptions = function(options) {
            if (options.animate !== undefined) {
                this.setAnimate(options.animate);
            }

            if (options.paneName !== undefined) {
                this.setPaneName(options.paneName);
            }

            if (options.updateHandler !== undefined) {
                this.setUpdateHandler(options.updateHandler);
            }

            if (options.resizeHandler !== undefined) {
                this.setResizeHandler(options.resizeHandler);
            }

            if (options.resolutionScale !== undefined) {
                this.setResolutionScale(options.resolutionScale);
            }

            if (options.map !== undefined) {
                this.setMap(options.map);
            }
        };

        /**
         * Set the animated state of the layer. If true, updateHandler will be called
         * repeatedly, once per frame. If false, updateHandler will only be called when
         * a map property changes that could require the canvas content to be redrawn.
         * @param {boolean} animate Whether the canvas is animated.
         */
        CanvasLayer$2.prototype.setAnimate = function(animate) {
            this.isAnimated_ = !!animate;

            if (this.isAnimated_) {
                this.scheduleUpdate();
            }
        };

        /**
         * @return {boolean} Whether the canvas is animated.
         */
        CanvasLayer$2.prototype.isAnimated = function() {
            return this.isAnimated_;
        };

        /**
         * Set the MapPane in which this layer will be displayed, by name. See
         * {@code google.maps.MapPanes} for the panes available.
         * @param {string} paneName The name of the desired MapPane.
         */
        CanvasLayer$2.prototype.setPaneName = function(paneName) {
            this.paneName_ = paneName;

            this.setPane_();
        };

        /**
         * @return {string} The name of the current container pane.
         */
        CanvasLayer$2.prototype.getPaneName = function() {
            return this.paneName_;
        };

        /**
         * Adds the canvas to the specified container pane. Since this is guaranteed to
         * execute only after onAdd is called, this is when paneName's existence is
         * checked (and an error is thrown if it doesn't exist).
         * @private
         */
        CanvasLayer$2.prototype.setPane_ = function() {
            if (!this.isAdded_) {
                return;
            }

            // onAdd has been called, so panes can be used
            var panes = this.getPanes();
            if (!panes[this.paneName_]) {
                throw new Error('"' + this.paneName_ + '" is not a valid MapPane name.');
            }

            panes[this.paneName_].appendChild(this.canvas);
        };

        /**
         * Set a function that will be called whenever the parent map and the overlay's
         * canvas have been resized. If opt_resizeHandler is null or unspecified, any
         * existing callback is removed.
         * @param {?function=} opt_resizeHandler The resize callback function.
         */
        CanvasLayer$2.prototype.setResizeHandler = function(opt_resizeHandler) {
            this.resizeHandler_ = opt_resizeHandler;
        };

        /**
         * Sets a value for scaling the canvas resolution relative to the canvas
         * display size. This can be used to save computation by scaling the backing
         * buffer down, or to support high DPI devices by scaling it up (by e.g.
         * window.devicePixelRatio).
         * @param {number} scale
         */
        CanvasLayer$2.prototype.setResolutionScale = function(scale) {
            if (typeof scale === 'number') {
                this.resolutionScale_ = scale;
                this.resize_();
            }
        };

        /**
         * Set a function that will be called when a repaint of the canvas is required.
         * If opt_updateHandler is null or unspecified, any existing callback is
         * removed.
         * @param {?function=} opt_updateHandler The update callback function.
         */
        CanvasLayer$2.prototype.setUpdateHandler = function(opt_updateHandler) {
            this.updateHandler_ = opt_updateHandler;
        };

        /**
         * @inheritDoc
         */
        CanvasLayer$2.prototype.onAdd = function() {
            if (this.isAdded_) {
                return;
            }

            this.isAdded_ = true;
            this.setPane_();

            this.resizeListener_ = google.maps.event.addListener(this.getMap(), 'resize', this.resizeFunction_);
            this.centerListener_ = google.maps.event.addListener(this.getMap(), 'center_changed', this.repositionFunction_);

            this.resize_();
            this.repositionCanvas_();
        };

        /**
         * @inheritDoc
         */
        CanvasLayer$2.prototype.onRemove = function() {
            if (!this.isAdded_) {
                return;
            }

            this.isAdded_ = false;
            this.topLeft_ = null;

            // remove canvas and listeners for pan and resize from map
            this.canvas.parentElement.removeChild(this.canvas);
            if (this.centerListener_) {
                google.maps.event.removeListener(this.centerListener_);
                this.centerListener_ = null;
            }
            if (this.resizeListener_) {
                google.maps.event.removeListener(this.resizeListener_);
                this.resizeListener_ = null;
            }

            // cease canvas update callbacks
            if (this.requestAnimationFrameId_) {
                this.cancelAnimFrame_.call(global$4, this.requestAnimationFrameId_);
                this.requestAnimationFrameId_ = null;
            }
        };

        /**
         * The internal callback for resize events that resizes the canvas to keep the
         * map properly covered.
         * @private
         */
        CanvasLayer$2.prototype.resize_ = function() {
            if (!this.isAdded_) {
                return;
            }

            var map = this.getMap();
            var mapWidth = map.getDiv().offsetWidth;
            var mapHeight = map.getDiv().offsetHeight;

            var newWidth = mapWidth * this.resolutionScale_;
            var newHeight = mapHeight * this.resolutionScale_;
            var oldWidth = this.canvas.width;
            var oldHeight = this.canvas.height;

            // resizing may allocate a new back buffer, so do so conservatively
            if (oldWidth !== newWidth || oldHeight !== newHeight) {
                this.canvas.width = newWidth;
                this.canvas.height = newHeight;

                this.needsResize_ = true;
                this.scheduleUpdate();
            }

            // reset styling if new sizes don't match; resize of data not needed
            if (this.canvasCssWidth_ !== mapWidth || this.canvasCssHeight_ !== mapHeight) {
                this.canvasCssWidth_ = mapWidth;
                this.canvasCssHeight_ = mapHeight;
                this.canvas.style.width = mapWidth + 'px';
                this.canvas.style.height = mapHeight + 'px';
            }
        };

        /**
         * @inheritDoc
         */
        CanvasLayer$2.prototype.draw = function() {
            this.repositionCanvas_();
        };

        /**
         * Internal callback for map view changes. Since the Maps API moves the overlay
         * along with the map, this function calculates the opposite translation to
         * keep the canvas in place.
         * @private
         */
        CanvasLayer$2.prototype.repositionCanvas_ = function() {
            // TODO(bckenny): *should* only be executed on RAF, but in current browsers
            //     this causes noticeable hitches in map and overlay relative
            //     positioning.

            var map = this.getMap();

            // topLeft can't be calculated from map.getBounds(), because bounds are
            // clamped to -180 and 180 when completely zoomed out. Instead, calculate
            // left as an offset from the center, which is an unwrapped LatLng.
            var top = map.getBounds().getNorthEast().lat();
            var center = map.getCenter();
            var scale = Math.pow(2, map.getZoom());
            var left = center.lng() - this.canvasCssWidth_ * 180 / (256 * scale);
            this.topLeft_ = new google.maps.LatLng(top, left);

            // Canvas position relative to draggable map's container depends on
            // overlayView's projection, not the map's. Have to use the center of the
            // map for this, not the top left, for the same reason as above.
            var projection = this.getProjection();
            var divCenter = projection.fromLatLngToDivPixel(center);
            var offsetX = -Math.round(this.canvasCssWidth_ / 2 - divCenter.x);
            var offsetY = -Math.round(this.canvasCssHeight_ / 2 - divCenter.y);
            this.canvas.style[CanvasLayer$2.CSS_TRANSFORM_] = 'translate(' + offsetX + 'px,' + offsetY + 'px)';

            this.scheduleUpdate();
        };

        /**
         * Internal callback that serves as main animation scheduler via
         * requestAnimationFrame. Calls resize and update callbacks if set, and
         * schedules the next frame if overlay is animated.
         * @private
         */
        CanvasLayer$2.prototype.update_ = function() {
            this.requestAnimationFrameId_ = null;

            if (!this.isAdded_) {
                return;
            }

            if (this.isAnimated_) {
                this.scheduleUpdate();
            }

            if (this.needsResize_ && this.resizeHandler_) {
                this.needsResize_ = false;
                this.resizeHandler_();
            }

            if (this.updateHandler_) {
                this.updateHandler_();
            }
        };

        /**
         * A convenience method to get the current LatLng coordinate of the top left of
         * the current view of the map.
         * @return {google.maps.LatLng} The top left coordinate.
         */
        CanvasLayer$2.prototype.getTopLeft = function() {
            return this.topLeft_;
        };

        /**
         * Schedule a requestAnimationFrame callback to updateHandler. If one is
         * already scheduled, there is no effect.
         */
        CanvasLayer$2.prototype.scheduleUpdate = function() {
            if (this.isAdded_ && !this.requestAnimationFrameId_) {
                this.requestAnimationFrameId_ = this.requestAnimFrame_.call(global$4, this.requestUpdateFunction_);
            }
        };
    }

    /**
     * @author kyle / http://nikai.us/
     */

    var Layer$2 = function(_BaseLayer) {
        inherits(Layer, _BaseLayer);

        function Layer(map, dataSet, options) {
            classCallCheck(this, Layer);

            var _this = possibleConstructorReturn(this, (Layer.__proto__ || Object.getPrototypeOf(Layer)).call(this, map, dataSet, options));

            var self = _this;
            var data = null;
            options = options || {};

            self.init(options);
            self.argCheck(options);

            var canvasLayerOptions = {
                map: map,
                animate: false,
                updateHandler: function updateHandler() {
                    self._canvasUpdate();
                },
                resolutionScale: resolutionScale
            };

            var canvasLayer = _this.canvasLayer = new CanvasLayer$2(canvasLayerOptions);

            _this.clickEvent = _this.clickEvent.bind(_this);
            _this.mousemoveEvent = _this.mousemoveEvent.bind(_this);
            _this.bindEvent();
            return _this;
        }

        createClass(Layer, [{
            key: "clickEvent",
            value: function clickEvent(e) {
                var pixel = e.pixel;
                get(Layer.prototype.__proto__ || Object.getPrototypeOf(Layer.prototype), "clickEvent", this).call(this, pixel, e);
            }
        }, {
            key: "mousemoveEvent",
            value: function mousemoveEvent(e) {
                var pixel = e.pixel;
                get(Layer.prototype.__proto__ || Object.getPrototypeOf(Layer.prototype), "mousemoveEvent", this).call(this, pixel, e);
            }
        }, {
            key: "bindEvent",
            value: function bindEvent(e) {
                var map = this.map;

                if (this.options.methods) {
                    if (this.options.methods.click) {
                        map.setDefaultCursor("default");
                        map.addListener('click', this.clickEvent);
                    }
                    if (this.options.methods.mousemove) {
                        map.addListener('mousemove', this.mousemoveEvent);
                    }
                }
            }
        }, {
            key: "unbindEvent",
            value: function unbindEvent(e) {
                var map = this.map;

                if (this.options.methods) {
                    if (this.options.methods.click) {
                        map.removeListener('click', this.clickEvent);
                    }
                    if (this.options.methods.mousemove) {
                        map.removeListener('mousemove', this.mousemoveEvent);
                    }
                }
            }
        }, {
            key: "getContext",
            value: function getContext() {
                return this.canvasLayer.canvas.getContext(this.context);
            }
        }, {
            key: "_canvasUpdate",
            value: function _canvasUpdate(time) {
                if (!this.canvasLayer) {
                    return;
                }

                var self = this;

                var animationOptions = self.options.animation;

                var context = this.getContext();

                if (self.isEnabledTime()) {
                    if (time === undefined) {
                        clear(context);
                        return;
                    }
                    if (this.context == '2d') {
                        context.save();
                        context.globalCompositeOperation = 'destination-out';
                        context.fillStyle = 'rgba(0, 0, 0, .1)';
                        context.fillRect(0, 0, context.canvas.width, context.canvas.height);
                        context.restore();
                    }
                } else {
                    clear(context);
                }

                if (this.context == '2d') {
                    for (var key in self.options) {
                        context[key] = self.options[key];
                    }
                } else {
                    context.clear(context.COLOR_BUFFER_BIT);
                }

                if (self.options.minZoom && map.getZoom() < self.options.minZoom || self.options.maxZoom && map.getZoom() > self.options.maxZoom) {
                    return;
                }

                var scale = 1;
                if (this.context != '2d') {
                    scale = this.canvasLayer.devicePixelRatio;
                }

                var map = this.map;
                var mapProjection = map.getProjection();
                var scale = Math.pow(2, map.zoom) * resolutionScale;
                var offset = mapProjection.fromLatLngToPoint(this.canvasLayer.getTopLeft());
                var dataGetOptions = {
                    //fromColumn: self.options.coordType == 'bd09mc' ? 'coordinates' : 'coordinates_mercator',
                    transferCoordinate: function transferCoordinate(coordinate) {
                        var latLng = new google.maps.LatLng(coordinate[1], coordinate[0]);
                        var worldPoint = mapProjection.fromLatLngToPoint(latLng);
                        var pixel = {
                            x: (worldPoint.x - offset.x) * scale,
                            y: (worldPoint.y - offset.y) * scale
                        };
                        return [pixel.x, pixel.y];
                    }
                };

                if (time !== undefined) {
                    dataGetOptions.filter = function(item) {
                        var trails = animationOptions.trails || 10;
                        if (time && item.time > time - trails && item.time < time) {
                            return true;
                        } else {
                            return false;
                        }
                    };
                }

                // get data from data set
                var data = self.dataSet.get(dataGetOptions);

                this.processData(data);

                var latLng = new google.maps.LatLng(0, 0);
                var worldPoint = mapProjection.fromLatLngToPoint(latLng);
                var pixel = {
                    x: (worldPoint.x - offset.x) * scale,
                    y: (worldPoint.y - offset.y) * scale
                };

                if (self.options.unit == 'm' && self.options.size) {
                    self.options._size = self.options.size / zoomUnit;
                } else {
                    self.options._size = self.options.size;
                }

                this.drawContext(context, new DataSet(data), self.options, pixel);

                //console.timeEnd('draw');

                //console.timeEnd('update')
                self.options.updateCallback && self.options.updateCallback(time);
            }
        }, {
            key: "init",
            value: function init(options) {

                var self = this;

                self.options = options;

                this.initDataRange(options);

                this.context = self.options.context || '2d';

                if (self.options.zIndex) {
                    this.canvasLayer && this.canvasLayer.setZIndex(self.options.zIndex);
                }

                this.initAnimator();
            }
        }, {
            key: "addAnimatorEvent",
            value: function addAnimatorEvent() {
                this.map.addListener('movestart', this.animatorMovestartEvent.bind(this));
                this.map.addListener('moveend', this.animatorMoveendEvent.bind(this));
            }
        }, {
            key: "show",
            value: function show() {
                this.map.addOverlay(this.canvasLayer);
            }
        }, {
            key: "hide",
            value: function hide() {
                this.map.removeOverlay(this.canvasLayer);
            }
        }, {
            key: "draw",
            value: function draw() {
                self.canvasLayer.draw();
            }
        }]);
        return Layer;
    }(BaseLayer);

    /**
     * @author kyle / http://nikai.us/
     */

    var geojson = {
        getDataSet: function getDataSet(geoJson) {

            var data = [];
            var features = geoJson.features;
            for (var i = 0; i < features.length; i++) {
                var feature = features[i];
                var geometry = feature.geometry;
                var properties = feature.properties;
                var item = {};
                for (var key in properties) {
                    item[key] = properties[key];
                }
                item.geometry = geometry;
                data.push(item);
            }
            return new DataSet(data);
        }
    };

    /**
     * @author kyle / http://nikai.us/
     */

    var csv = {
        CSVToArray: function CSVToArray(strData, strDelimiter) {
            // Check to see if the delimiter is defined. If not,
            // then default to comma.
            strDelimiter = strDelimiter || ",";

            // Create a regular expression to parse the CSV values.
            var objPattern = new RegExp(
                // Delimiters.
                "(\\" + strDelimiter + "|\\r?\\n|\\r|^)" +

                // Quoted fields.
                "(?:\"([^\"]*(?:\"\"[^\"]*)*)\"|" +

                // Standard fields.
                "([^\"\\" + strDelimiter + "\\r\\n]*))", "gi");

            // Create an array to hold our data. Give the array
            // a default empty first row.
            var arrData = [
                []
            ];

            // Create an array to hold our individual pattern
            // matching groups.
            var arrMatches = null;

            // Keep looping over the regular expression matches
            // until we can no longer find a match.
            while (arrMatches = objPattern.exec(strData)) {

                // Get the delimiter that was found.
                var strMatchedDelimiter = arrMatches[1];

                // Check to see if the given delimiter has a length
                // (is not the start of string) and if it matches
                // field delimiter. If id does not, then we know
                // that this delimiter is a row delimiter.
                if (strMatchedDelimiter.length && strMatchedDelimiter !== strDelimiter) {

                    // Since we have reached a new row of data,
                    // add an empty row to our data array.
                    arrData.push([]);
                }

                var strMatchedValue;

                // Now that we have our delimiter out of the way,
                // let's check to see which kind of value we
                // captured (quoted or unquoted).
                if (arrMatches[2]) {

                    // We found a quoted value. When we capture
                    // this value, unescape any double quotes.
                    strMatchedValue = arrMatches[2].replace(new RegExp("\"\"", "g"), "\"");
                } else {

                    // We found a non-quoted value.
                    strMatchedValue = arrMatches[3];
                }

                // Now that we have our value string, let's add
                // it to the data array.
                arrData[arrData.length - 1].push(strMatchedValue);
            }

            // Return the parsed data.
            return arrData;
        },

        getDataSet: function getDataSet(csvStr) {

            var arr = this.CSVToArray(csvStr, ',');

            var data = [];

            var header = arr[0];

            for (var i = 1; i < arr.length - 1; i++) {
                var line = arr[i];
                var item = {};
                for (var j = 0; j < line.length; j++) {
                    var value = line[j];
                    if (header[j] == 'geometry') {
                        value = JSON.parse(value);
                    }
                    item[header[j]] = value;
                }
                data.push(item);
            }

            return new DataSet(data);
        }
    };

    exports.version = version;
    exports.canvasClear = clear;
    exports.canvasResolutionScale = resolutionScale$1;
    exports.canvasDrawSimple = drawSimple;
    exports.canvasDrawHeatmap = drawHeatmap;
    exports.canvasDrawGrid = drawGrid;
    exports.canvasDrawHoneycomb = drawHoneycomb;
    exports.webglDrawSimple = webglDrawSimple;
    exports.webglDrawPoint = point;
    exports.webglDrawLine = line;
    exports.webglDrawPolygon = polygon;
    exports.utilCityCenter = cityCenter;
    exports.utilCurve = curve;
    exports.utilForceEdgeBundling = ForceEdgeBundling;
    exports.utilDataRangeIntensity = Intensity;
    exports.utilDataRangeCategory = Category;
    exports.utilDataRangeChoropleth = Choropleth;
    exports.Map = MapHelper;
    exports.baiduMapCanvasLayer = CanvasLayer;
    exports.baiduMapAnimationLayer = AnimationLayer;
    exports.baiduMapLayer = Layer;
    exports.googleMapCanvasLayer = CanvasLayer$2;
    exports.googleMapLayer = Layer$2;
    exports.DataSet = DataSet;
    exports.geojson = geojson;
    exports.csv = csv;

    Object.defineProperty(exports, '__esModule', {
        value: true
    });

})));