I3s Integratedmesh Layer

<!--
  示例：集成网格图层
  说明：沿街铺开的连续网格体块，拾取时整片网格高亮并显示来源图层
  核心逻辑：程序化网格条带 → 整层拾取 → 高亮材质切换
  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>集成网格图层</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%}
  .tip{position:absolute;left:12px;top:12px;z-index:5;
       background:rgba(23,28,35,.9);border:1px solid #2a313b;border-radius:6px;
       padding:8px 12px;font-size:12px;color:#a2a9b6;max-width:320px;line-height:1.6}

  .info{position:absolute;right:12px;top:12px;background:rgba(23,28,35,.92);
        border:1px solid #2a313b;border-radius:6px;padding:8px 12px;font-size:12px;color:#cfe2f5}
  .cesium-viewer-bottom .cesium-widget-credits,.cesium-viewer-animationContainer,
  .cesium-viewer-timelineContainer{display:none!important}
</style>
</head>
<body>
<div id="c"></div>
<div class="tip">点击任意体块会高亮整条街的网格，代表同一集成网格图层。</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.sun.show = false;
  scene.moon.show = false;
  if (scene.skyAtmosphere) scene.skyAtmosphere.show = false;

  var strip = [];
  for (var i = 0; i < 26; i++) {
    var h = 26 + Math.sin(i * 0.6) * 14 + (i % 3) * 6;
    var e = viewer.entities.add({
      position: Cesium.Cartesian3.fromDegrees(116.3848 + i * 0.0005, 39.9032, h / 2),
      box: {
        dimensions: new Cesium.Cartesian3(24, 34, h),
        material: Cesium.Color.fromCssColorString('#5a6a7c').withAlpha(0.95),
        outline: true,
        outlineColor: Cesium.Color.fromCssColorString('#12171d')
      }
    });
    strip.push(e);
  }

  var label = document.createElement('div');
  label.className = 'info';
  label.style.display = 'none';
  document.body.appendChild(label);

  function paint(color) {
    strip.forEach(function (e) {
      e.box.material = Cesium.Color.fromCssColorString(color).withAlpha(0.95);
    });
  }

  var handler = new Cesium.ScreenSpaceEventHandler(scene.canvas);
  handler.setInputAction(function (click) {
    var picked = scene.pick(click.position);
    if (!Cesium.defined(picked) || !picked.id) {
      paint('#5a6a7c');
      label.style.display = 'none';
      return;
    }
    paint('#cfe2f5');
    label.style.display = 'block';
    label.textContent = '集成网格图层 · 整层要素';
  }, Cesium.ScreenSpaceEventType.LEFT_CLICK);
  viewer.camera.flyTo({
    destination: Cesium.Cartesian3.fromDegrees(116.3938, 39.8996, 320),
    orientation: { heading: Cesium.Math.toRadians(14), pitch: Cesium.Math.toRadians(-14), roll: 0 },
    duration: 0
  });
})();
</script>
</body>
</html>