2025-04-06 01:30:00 +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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<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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<!-- <script src="https://cesium.com/downloads/cesiumjs/releases/1.127/Build/Cesium/Cesium.js"></script>
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<link href="https://cesium.com/downloads/cesiumjs/releases/1.127/Build/Cesium/Widgets/widgets.css" rel="stylesheet" /> -->
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<script src="./turf.min.js"></script>
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<!-- 收费站、道路、高架桥、河流、隧道、车辆、高铁、飞机、高压线 -->
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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="cesiumContainer" style="margin: 0 auto; width: 100%; height: 100%"></div>
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<script type="text/javascript">
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2025-06-07 11:30:00 +00:00
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Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiIyMjBhMzcxMC0wNjBiLTRmYjItYjY1MC0wMzAwMzMyMGUyMmEiLCJpZCI6MzAzNzc3LCJpYXQiOjE3NDc2Mzk0NTV9.E_90aKtVdzRGlU2z48VwJ4mWvl-uuDkfQBCOO6zbzn4'
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2025-04-06 01:30:00 +00:00
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// const viewer = new Cesium.Viewer('cesiumContainer', {});
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// viewer.scene.debugShowFramesPerSecond = true;
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// // 清除默认地形
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// viewer.scene.terrainProvider = new Cesium.EllipsoidTerrainProvider({});
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// // 加载火星地形
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// viewer.terrainProvider = new Cesium.CesiumTerrainProvider({
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// url: 'http://data.mars3d.cn/terrain'
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// });
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// // 深度监测
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// viewer.scene.globe.depthTestAgainstTerrain = true;
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// 经度:109.965183, 纬度:31.154943, 高程:446.5, 横坐标:37401328.2, 纵坐标:3448614.0 (CGCS2000)
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// 经度:109.567922, 纬度:31.235356, 高程:182.9, 横坐标:37398678.4, 纵坐标:3457556.3 (CGCS2000)
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// let start = [109.965183, 31.154943, 400];
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// let end = [109.567922, 31.235356, 400];
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const viewer = new Cesium.Viewer("cesiumContainer", {
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terrainProvider: Cesium.createWorldTerrain(),
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});
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let obj = {"lat":31.152283,"lng":109.966151,"alt":763.3,"heading":341.3,"pitch":-45.2}
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viewer.camera.setView({
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destination: Cesium.Cartesian3.fromDegrees(obj.lng, obj.lat, obj.alt),
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orientation: {
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heading: Cesium.Math.toRadians(obj.heading),
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pitch: Cesium.Math.toRadians(obj.pitch),
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roll: 0.0
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}
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});
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viewer.scene.globe.depthTestAgainstTerrain = true;
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// 定义隧道参数
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const startPoint = Cesium.Cartesian3.fromDegrees(109.965183, 31.154943); // 起点
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const endPoint = Cesium.Cartesian3.fromDegrees(109.567922, 31.235356); // 终点
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const tunnelWidth = 20.0; // 隧道宽度（米）
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const tunnelHeight =446.0; // 隧道高度（米）
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//-----------------------------------------------------------
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// **关键修正 1：计算隧道路径方向向量**
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//-----------------------------------------------------------
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const direction = Cesium.Cartesian3.subtract(endPoint, startPoint, new Cesium.Cartesian3());
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Cesium.Cartesian3.normalize(direction, direction);
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// 计算垂直于路径的水平方向（左右方向）
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const rightDirection = Cesium.Cartesian3.cross(
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direction,
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Cesium.Cartesian3.UNIT_Z,
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new Cesium.Cartesian3()
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);
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Cesium.Cartesian3.normalize(rightDirection, rightDirection);
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//-----------------------------------------------------------
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// **关键修正 2：正确设置裁剪平面参数**
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//-----------------------------------------------------------
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const clippingPlanes = new Cesium.ClippingPlaneCollection({
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planes: [
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// 左侧面（法线向右，偏移量为负宽度/2）
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new Cesium.ClippingPlane(
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rightDirection,
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-tunnelWidth / 2 // 平面向右移动宽度的一半
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),
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// 右侧面（法线向左，偏移量为负宽度/2）
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new Cesium.ClippingPlane(
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Cesium.Cartesian3.negate(rightDirection, new Cesium.Cartesian3()),
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-tunnelWidth / 2
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),
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// 顶部（法线向下，偏移量为负高度/2）
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new Cesium.ClippingPlane(
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Cesium.Cartesian3.UNIT_Z,
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-tunnelHeight / 2
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),
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// 底部（法线向上，偏移量为负高度/2）
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new Cesium.ClippingPlane(
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Cesium.Cartesian3.negate(Cesium.Cartesian3.UNIT_Z, new Cesium.Cartesian3()),
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-tunnelHeight / 2
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)
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],
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// edgeWidth: 1.0,
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// edgeColor: Cesium.Color.RED
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});
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//-----------------------------------------------------------
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// **关键修正 3：确保裁剪平面位置正确**
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//-----------------------------------------------------------
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// 将裁剪平面集合平移到隧道路径中心
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const center = Cesium.Cartesian3.lerp(startPoint, endPoint, 0.5, new Cesium.Cartesian3());
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clippingPlanes.modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(center);
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// 应用裁剪到地形
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viewer.scene.globe.clippingPlanes = clippingPlanes;
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</script>
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</body>
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</html>
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