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<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <script src="lib/esl.js"></script>
        <script src="lib/config.js"></script>
        <script src="lib/jquery.min.js"></script>
        <script src="lib/facePrint.js"></script>
        <script src="lib/testHelper.js"></script>
        <link rel="stylesheet" href="lib/reset.css">
    </head>
    <body>
        <style>
            h1 {
                line-height: 60px;
                height: 60px;
                background: #146402;
                text-align: center;
                font-weight: bold;
                color: #eee;
                font-size: 14px;
            }
            .chart {
                height: 500px;
            }
        </style>


        <div class="chart" id="main"></div>


        <script>

            var echarts;
            var chart;
            var myChart;
            var groupCategories = [];
            var groupColors = [];

            require([
                'echarts'
                // 'echarts/chart/map',
                // 'echarts/chart/custom',
                // 'echarts/component/geo',
                // 'echarts/component/legend',
                // 'echarts/component/tooltip',
                // 'echarts/component/toolbox',
                // 'echarts/component/visualMap',
                // 'echarts/component/dataZoom'
            ], function (ec) {

                echarts = ec;

                $.get('./data/map/json/world.json', function (worldJson) {
                    echarts.registerMap('world', worldJson);

                    $.getJSON('./data/global-wind.json', function (windData) {
                        var p = 0;
                        var maxMag = 0;
                        var minMag = Infinity;
                        var data = [];
                        for (var j = 0; j < windData.ny; j++) {
                            for (var i = 0; i < windData.nx; i++, p++) {
                                var vx = windData.data[p][0];
                                var vy = windData.data[p][1];
                                var mag = Math.sqrt(vx * vx + vy * vy);
                                // 数据是一个一维数组
                                // [ [经度, 维度，向量经度方向的值，向量维度方向的值] ]
                                data.push([
                                    i / windData.nx * 360 - 180,
                                    j / windData.ny * 180 - 90,
                                    vx,
                                    vy,
                                    mag
                                ]);
                                maxMag = Math.max(mag, maxMag);
                                minMag = Math.min(mag, minMag);
                            }
                        }
                        data.reverse();

                        var option = {
                            backgroundColor: '#333',
                            visualMap: {
                                left: 'center',
                                min: minMag,
                                max: maxMag,
                                dimension: 4,
                                inRange: {
                                    // color: ['green', 'yellow', 'red']
                                            color: ['#313695', '#4575b4', '#74add1', '#abd9e9', '#e0f3f8', '#ffffbf', '#fee090', '#fdae61', '#f46d43', '#d73027', '#a50026']
                                },
                                realtime: false,
                                hoverLink: true,
                                calculable: true,
                                textStyle: {
                                    color: '#fff'
                                },
                                orient: 'horizontal'
                            },
                            geo: {
                                map: 'world',
                                left: 0,
                                right: 0,
                                top: 0,
                                zoom: 1,
                                silent: true,
                                itemStyle: {
                                    normal: {
                                        areaColor: '#323c48',
                                        borderColor: '#111'
                                    }
                                }
                            },
                            series: {
                                type: 'custom',
                                coordinateSystem: 'geo',
                                data: data,
                                // silent: true,
                                encode: {
                                    x: 0,
                                    y: 0
                                },
                                renderItem: function (params, api) {
                                    var x = api.value(0), y = api.value(1), dx = api.value(2), dy = api.value(3);
                                    var start = api.coord([Math.max(x - dx / 5, -180), Math.max(y - dy / 5, -90)]);
                                    var end = api.coord([Math.min(x + dx / 5, 180), Math.min(y + dy / 5, 90)]);
                                    return {
                                        type: 'line',
                                        shape: {
                                            x1: start[0], y1: start[1],
                                            x2: end[0], y2: end[1]
                                        },
                                        style: {
                                            lineWidth: 0.5,
                                            stroke: api.visual('color')
                                        }
                                    }
                                },
                                progressive: 2000
                            }
                        };

                        testHelper.createChart(echarts, 'main', option);
                    });
                });

            });

        </script>
    </body>
</html>