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<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <script src="lib/simpleRequire.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',
                './data/map/json/world.json',
                './data/global-wind.json'
            ], function (ec, worldJson, windData) {

                echarts = ec;
                echarts.registerMap('world', worldJson);
                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>