2025-03-11 08:25:45 +00:00
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<!--********************************************************************
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* by jiawanlong
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*********************************************************************-->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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2025-03-19 03:00:22 +00:00
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<link rel="stylesheet" href="./../../libs/cesium/Cesium1.98/Widgets/widgets.css">
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<script type="text/javascript" src="./../../libs/cesium/Cesium1.98/Cesium.js"></script>
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2025-03-11 08:25:45 +00:00
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<script src="./turf.min.js"></script>
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<script src="./latlng.js"></script>
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<script src="./echarts/5.4.3/echarts.min.js"></script>
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<script src=""></script>
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<style>
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#menu {
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position: absolute;
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bottom: 20px;
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left: 0;
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padding: 10px;
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background: #72a8eafa;
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border-radius: 3px;
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border: 1px solid rgba(128, 128, 128, 0.5);
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color: #ffffff;
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background: rgba(0, 0, 0, 0.4);
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box-shadow: 0 3px 14px rgba(128, 128, 128, 0.5);
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z-index: 9999;
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width: 100%;
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height: 300px;
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background: #ccc;
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;
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}
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</style>
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</head>
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<body style="margin: 0; overflow: hidden; background: #fff; width: 100%; height: 100%; position: absolute; top: 0">
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<div id="map" style="margin: 0 auto; width: 100%; height: 100%"></div>
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<div id="menu">
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</div>
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<script type="text/javascript">
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2025-05-18 11:30:00 +00:00
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Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiJjM2EzNGJmNy02N2RmLTQ0MDMtYjI2MS1hZTJiMTIwZGYwMTYiLCJpZCI6MzA0MzEyLCJpYXQiOjE3NDc3MjM3MTV9.ePQNhuoVuDsi_z00lTm5W26wyW1Adcr1AWetGM6WSXI'
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2025-03-11 08:25:45 +00:00
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const viewer = new Cesium.Viewer('map', {});
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// 开启帧率
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viewer.scene.debugShowFramesPerSecond = true;
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// 深度监测
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viewer.scene.globe.depthTestAgainstTerrain = true;
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// 加载默认地形
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viewer.terrainProvider = Cesium.createWorldTerrain({
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requestWaterMask: true, // 请求水掩膜以实现水体效果
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requestVertexNormals: true // 请求法线以实现光照效果
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});
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viewer.camera.flyTo({
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destination: Cesium.Rectangle.fromDegrees(90, 30, 92, 32),
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duration: 3,
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complete: () => {
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setTimeout(() => {
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initPM();
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}, 10000)
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}
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});
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`
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实现思路：
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插值获取不同点的高度
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1、cesium插值 Cesium.Math.lerp
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2、turf插值 https://turfjs.fenxianglu.cn/category/misc/lineChunk.html
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`
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function initPM() {
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initLabel();
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let arr = [[90.5, 30.5], [91, 31], [91.5, 31.5], [90.5, 31.5]];
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let arr2 = [];
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let arr3 = [];
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let step = 100;
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arr.forEach((ele, index) => {
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for (var i = 0; i < step; ++i) {
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if (index < arr.length - 1) {
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let offset = i / (step - 1);
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let startx = arr[index][0]
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let starty = arr[index][1]
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let endx = arr[index + 1][0]
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let endy = arr[index + 1][1]
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var lon = Cesium.Math.lerp(startx, endx, offset);
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var lat = Cesium.Math.lerp(starty, endy, offset);
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var cartographic = Cesium.Cartographic.fromDegrees(lon, lat);
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var posi = new Cesium.Cartographic(cartographic.longitude, cartographic.latitude)
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var height = viewer.scene.globe.getHeight(posi)
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arr2.push([lon, lat])
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var length = 0
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if (arr2.length > 1) {
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var line = turf.lineString(arr2);
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length = turf.length(line, { units: 'miles' });
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}
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arr3.push([lon, lat, height, length])
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}
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}
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})
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console.log(arr3)
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initCharts(arr3)
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}
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function initCharts(arr3) {
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var myChart = echarts.init(document.getElementById('menu'));
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let name = []
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let data = []
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arr3.forEach((k) => {
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name.push(k[3])
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data.push(k[2])
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})
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var option = {
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xAxis: {
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type: 'category',
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boundaryGap: false,
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data: name
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},
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tooltip: {
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trigger: 'axis',
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axisPointer: {
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label: {
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backgroundColor: '#6a7985'
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}
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}
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},
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yAxis: {
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type: 'value'
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},
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series: [
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{
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data: data,
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type: 'line',
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areaStyle: {}
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}
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]
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};
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// 使用刚指定的配置项和数据显示图表。
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myChart.setOption(option);
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}
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function initLabel() {
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viewer.entities.add({
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name: '起点',
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position: Cesium.Cartesian3.fromDegrees(90.5, 30.5),
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point: {
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pixelSize: 5,
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color: Cesium.Color.RED,
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outlineColor: Cesium.Color.WHITE,
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outlineWidth: 2,
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verticalOrigin: Cesium.VerticalOrigin.TOP,
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heightReference: Cesium.HeightReference.CLAMP_TO_GROUND,
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disableDepthTestDistance: Number.POSITIVE_INFINITY,
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},
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label: {
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text: '起点',
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font: '14pt monospace',
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outlineWidth: 2,
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verticalOrigin: Cesium.VerticalOrigin.TOP,
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heightReference: Cesium.HeightReference.CLAMP_TO_GROUND,
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disableDepthTestDistance: Number.POSITIVE_INFINITY,
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}
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});
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viewer.entities.add({
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name: '终点',
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position: Cesium.Cartesian3.fromDegrees(90.5, 31.5),
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point: {
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pixelSize: 10,
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color: Cesium.Color.RED,
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outlineColor: Cesium.Color.WHITE,
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outlineWidth: 2,
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verticalOrigin: Cesium.VerticalOrigin.TOP,
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heightReference: Cesium.HeightReference.CLAMP_TO_GROUND,
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disableDepthTestDistance: Number.POSITIVE_INFINITY,
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},
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label: {
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text: '终点',
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font: '14pt monospace',
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outlineWidth: 2,
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verticalOrigin: Cesium.VerticalOrigin.TOP,
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heightReference: Cesium.HeightReference.CLAMP_TO_GROUND,
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disableDepthTestDistance: Number.POSITIVE_INFINITY,
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}
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});
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viewer.entities.add({
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polyline: {
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positions: Cesium.Cartesian3.fromDegreesArray([90.5, 30.5, 91, 31, 91.5, 31.5, 90.5, 31.5]),
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width: 3,
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material: Cesium.Color.RED,
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clampToGround: true,
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}
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});
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}
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</script>
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</body>
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</html>
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