Czml Corridor

<!--
  示例：用 CZML 沿二环中心线铺一条走廊带
  说明：corridor 只给中心线坐标和总宽度，Cesium 自动沿两侧各展开一半
  核心逻辑：corridor.width 按米给 → material 半透明填充 → CzmlDataSource.load
  依赖：CesiumJS 1.121 · jsDelivr CDN
-->
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta name="robots" content="noindex,follow">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>CZML 走廊带</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/cesium@1.121.0/Build/Cesium/Widgets/widgets.css">
<style>
  html,body{height:100%;margin:0}
  body{background:#0e1116;color:#e6e8ec;overflow:hidden;
       font:13px/1.6 -apple-system,"Segoe UI","PingFang SC",sans-serif}
  #c{height:100%}
  .cesium-viewer-bottom .cesium-widget-credits,.cesium-viewer-animationContainer,
  .cesium-viewer-timelineContainer{display:none!important}
</style>
</head>
<body>
<div id="c"></div>
<script src="https://cdn.jsdelivr.net/npm/cesium@1.121.0/Build/Cesium/Cesium.js"></script>
<script>
(function () {
  'use strict';

  var viewer = new Cesium.Viewer('c', {
    baseLayer: false,
    baseLayerPicker: false, geocoder: false, homeButton: false,
    sceneModePicker: false, navigationHelpButton: false,
    animation: false, timeline: false, fullscreenButton: false,
    infoBox: false, selectionIndicator: false
  });

  var scene = viewer.scene;
  scene.globe.baseColor = Cesium.Color.fromCssColorString('#1c2733');
  scene.backgroundColor = Cesium.Color.fromCssColorString('#0e1116');
  scene.skyBox.show = false;
  scene.moon.show = false;
  if (scene.skyAtmosphere) scene.skyAtmosphere.show = false;

  /* 一条近似环形的东西向路径 */
  var line = [
    116.330, 39.910, 0,
    116.360, 39.930, 0,
    116.400, 39.936, 0,
    116.440, 39.928, 0,
    116.468, 39.908, 0,
    116.470, 39.882, 0,
    116.442, 39.866, 0,
    116.402, 39.862, 0,
    116.362, 39.868, 0,
    116.334, 39.886, 0
  ];

  var data = [
    { id: 'document', name: '走廊带', version: '1.0' },
    {
      id: 'corridor',
      name: '宽 220 米的走廊带',
      positions: { cartographicDegrees: [116.400, 39.900, 0] },
      corridor: {
        positions: { cartographicDegrees: line },
        width: 220,
        height: 0,
        material: { solidColor: { color: { rgba: [77, 155, 255, 150] } } },
        outline: true,
        outlineColor: { rgba: [200, 225, 255, 220] }
      }
    },
    {
      id: 'centerline',
      positions: { cartographicDegrees: line },
      polyline: {
        positions: { cartographicDegrees: line },
        width: 2,
        material: { solidColor: { color: { rgba: [255, 214, 102, 255] } } }
      }
    },
    {
      id: 'label',
      position: { cartographicDegrees: [116.400, 39.948, 0] },
      label: {
        text: 'corridor.width = 220 米',
        font: '500 13px "Microsoft YaHei", sans-serif',
        fillColor: { rgba: [220, 234, 250, 255] },
        disableDepthTestDistance: Number.POSITIVE_INFINITY
      }
    }
  ];

  Cesium.CzmlDataSource.load(data).then(function (ds) {
    viewer.dataSources.add(ds);
  });

  viewer.camera.flyTo({
    destination: Cesium.Cartesian3.fromDegrees(116.402, 39.892, 24000),
    orientation: {
      heading: 0,
      pitch: Cesium.Math.toRadians(-48),
      roll: 0
    },
    duration: 0
  });
})();
</script>
</body>
</html>