mapbox、echarts实现地图流动效果

实现效果：


<html>

<head>
    <script src="https://api.mapbox.com/mapbox-gl-js/v0.38.0/mapbox-gl.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/echarts@v3.8.0/dist/echarts.min.js"></script>
    <script src="http://echarts.baidu.com/resource/echarts-gl-latest/dist/echarts-gl.min.js"></script>
</head>

<body style="margin: 0; padding: 0;">
    <div id="map" style="width: 100vw; height: 100vh"></div>
</body>

<script type="text/javascript">
    async function initialize() {
        
        // let jsonData = '请求的数据'
        // var szRoad=jsonData;

        var busLines = [];
        // var data = szRoad.data;
        // 示例数据
        var data = [{
"ROAD_LINE":"113.89793,22.55675;113.89783,22.55685;113.89767,22.557;113.89767,22.557;113.89752,22.55687;113.89735,22.55674;113.89719,22.55661;113.89705,22.55649;113.89687,22.55633;113.89687,22.55633;113.89667,22.55651;113.89653,22.55664;113.89648,22.55669;113.89635,22.55679;113.89635,22.55679;113.89716,22.55749;113.89727,22.55759;113.89746,22.55775;113.89746,22.55786;113.89729,22.55803;113.89682,22.55849;113.89636,22.55892;113.89587,22.55941;113.89551,22.55976;113.89551,22.55976;113.89592,22.56008;113.89595,22.5601;113.89597,22.56016;113.89609,22.56027;113.89623,22.56039;113.89637,22.5605;113.89651,22.56063;113.89668,22.56078;113.89668,22.56078;113.89629,22.56119;113.89625,22.56123;113.89617,22.56132;113.89617,22.56132;113.89608,22.56124;113.89589,22.56112"
},
{
"ROAD_LINE":"113.88296,22.56812;113.88304,22.56817;113.88316,22.56826;113.88334,22.56842;113.88334,22.56842;113.88345,22.5683;113.88357,22.56819;113.88357,22.56819;113.88382,22.5684;113.88406,22.5686;113.88419,22.56871;113.88425,22.56876;113.88428,22.56878;113.88441,22.56889;113.88464,22.56912;113.88524,22.56962;113.88524,22.56962;113.88579,22.56908;113.88628,22.56861;113.88685,22.56805;113.88705,22.56784;113.88712,22.56778;113.8873,22.56758;113.88773,22.56719;113.88777,22.56715;113.88844,22.5665;113.88859,22.56635;113.88865,22.56629;113.88904,22.56592;113.88909,22.56586;113.88963,22.56534;113.88981,22.56517;113.88986,22.56523;113.88916,22.56589;113.88914,22.56592;113.88845,22.56658;113.88845,22.56658;113.88889,22.56698;113.88889,22.56698;113.889,22.56688;113.88936,22.56648"
}];
        var hStep = 300 / (data.length - 1);

        var i = 0;
        for (var x in data) {
            // i++;
            // if(i<5000)
            //     continue;
            var line = data[x];
            // if(busLines.length>500)
            //     break;
            var pointString = line.ROAD_LINE;
            var pointArr = pointString.split(';');
            var lnglats = [];
            for (var j in pointArr) {
                lnglats.push(pointArr[j].split(','))
            }
            busLines.push({
                coords: lnglats,
                lineStyle: {
                    normal: {
                        color: echarts.color.modifyHSL('#5A94DF', Math.round(hStep * x))
                    }
                }
            })
        }

        option = {
            backgroundColor: '#404a59',
            mapbox: {
                center: [113.89764, 22.58294],
                zoom: 14,
                altitudeScale: 10000,
                style: {
                    'version': 8,
                    'sources': {
                        'raster-tiles': {
                            'type': 'raster',
                            'tiles': [
                                'https://map.geoq.cn/arcgis/rest/services/ChinaOnlineStreetPurplishBlue/MapServer/tile/{z}/{y}/{x}'
                            ],
                            'tileSize': 256
                        }
                    },
                    'layers': [
                        {
                            'id': 'simple-tiles',
                            'type': 'raster',
                            'source': 'raster-tiles',
                            'minzoom': 0,
                            'maxzoom': 22
                        }
                    ]
                },
                postEffect: {
                    enable: true,
                    FXAA: {
                        enable: true
                    }
                },
                light: {
                    main: {
                        intensity: 1,
                        shadow: true,
                        shadowQuality: 'high'
                    },
                    ambient: {
                        intensity: 0
                    },
                    ambientCubemap: {
                        // texture: '/asset/get/s/data-1491838644249-ry33I7YTe.hdr',
                        texture: '/asset/get/s/Milkyway_Light.hdr',
                        exposure: 1,
                        diffuseIntensity: 0.5,
                        specularIntensity: 2
                    }
                }
            },
            series: [{
                type: 'lines3D',

                coordinateSystem: 'mapbox',

                effect: {
                    show: true,
                    constantSpeed: 2,
                    trailWidth: 2,
                    trailLength: 0.4,
                    trailOpacity: 1,
                    spotIntensity: 10
                },

                blendMode: 'lighter',

                polyline: true,

                lineStyle: {
                    width: 0.1,
                    color: 'rgb(200, 40, 0)',
                    opacity: 0
                },

                data: {
                    count: function () {
                        return busLines.length;
                    },
                    getItem: function (idx) {
                        return busLines[idx]
                    }
                }
            }]
        };
   
        var myChart = echarts.init(document.getElementById('map'));
        myChart.setOption(option);

    }
    initialize();



</script>

</html>