Box Geometry

<!--
  示例：用立方体图元拼出一片楼群
  要点：BoxGraphics 的 dimensions 决定长宽高，position 的高度取半高让底面落地
  依赖：CesiumJS 1.121 · jsDelivr CDN，几何全部由代码生成
-->
<!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>立方体建筑群</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%}
  .hud{position:absolute;left:12px;top:12px;z-index:5;background:rgba(23,28,35,.9);
       border:1px solid #2a313b;border-radius:6px;padding:9px 12px;font-size:12px;
       color:#a2a9b6;max-width:250px}
  .hud b{color:#e6e8ec;font-weight:600}
  .hud .row{margin-top:6px}
  .cesium-viewer-bottom .cesium-widget-credits,.cesium-viewer-animationContainer,
  .cesium-viewer-timelineContainer{display:none!important}
</style>
</head>
<body>
<div id="c"></div>
<div class="hud">
  <div><b>立方体楼群</b></div>
  <div class="row" id="info">9 栋建筑 · 底面贴地</div>
  <div class="row">棱线由 outline 单独绘制</div>
</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;

  /* 经度、纬度、宽、深、高、颜色 */
  var BUILDINGS = [
    [116.383, 39.906, 130, 110, 460, '#4d9bff'],
    [116.386, 39.909, 90, 90, 320, '#5fa8ff'],
    [116.390, 39.905, 140, 120, 560, '#7ab6ff'],
    [116.394, 39.909, 100, 100, 240, '#3f86e0'],
    [116.397, 39.904, 120, 130, 380, '#4d9bff'],
    [116.391, 39.913, 160, 90, 200, '#6fa9ef'],
    [116.386, 39.914, 110, 110, 300, '#3f86e0'],
    [116.398, 39.913, 100, 100, 480, '#7ab6ff'],
    [116.394, 39.900, 150, 120, 260, '#5fa8ff']
  ];

  BUILDINGS.forEach(function (b) {
    var h = b[4];
    viewer.entities.add({
      position: Cesium.Cartesian3.fromDegrees(b[0], b[1], h / 2),
      box: {
        dimensions: new Cesium.Cartesian3(b[2], b[3], h),
        material: Cesium.Color.fromCssColorString(b[5]).withAlpha(0.78),
        outline: true,
        outlineColor: Cesium.Color.fromCssColorString('#cfe4ff'),
        outlineWidth: 1.5
      }
    });
  });

  /* 地面参考面：一块薄薄的板，用来对比建筑高度 */
  viewer.entities.add({
    position: Cesium.Cartesian3.fromDegrees(116.39, 39.907, -2),
    box: {
      dimensions: new Cesium.Cartesian3(2100, 1900, 2),
      material: Cesium.Color.fromCssColorString('#243140').withAlpha(0.85)
    }
  });

  viewer.camera.flyTo({
    destination: Cesium.Cartesian3.fromDegrees(116.377, 39.893, 1650),
    orientation: {
      heading: Cesium.Math.toRadians(42),
      pitch: Cesium.Math.toRadians(-32),
      roll: 0
    },
    duration: 0
  });
})();
</script>
</body>
</html>