Rectangle

<!--
  示例：矩形面
  说明：三块矩形用不同的旋转角与材质叠在同一片区域，边缘清晰
  核心逻辑：rectangle.coordinates = Rectangle → rotation / height / material
  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>矩形面</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}

  .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">矩形由经纬度范围直接定义，rotation 让它绕中心旋转。</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 base = Cesium.Rectangle.fromDegrees(116.383, 39.900, 116.392, 39.906);
  var specs = [
    { grow: 0, rot: 0, color: '#3f6f9c', h: 0 },
    { grow: -0.0012, rot: 12, color: '#5bb08a', h: 30 },
    { grow: -0.0026, rot: -18, color: '#d08a4e', h: 70 }
  ];

  specs.forEach(function (s) {
    viewer.entities.add({
      rectangle: {
        coordinates: new Cesium.Rectangle(
          base.west + s.grow, base.south + s.grow,
          base.east - s.grow, base.north - s.grow
        ),
        rotation: Cesium.Math.toRadians(s.rot),
        height: s.h,
        material: Cesium.Color.fromCssColorString(s.color).withAlpha(0.8),
        outline: true,
        outlineColor: Cesium.Color.fromCssColorString('#0e1116')
      }
    });
  });
  viewer.camera.flyTo({
    destination: Cesium.Cartesian3.fromDegrees(116.3875, 39.8995, 760),
    orientation: { heading: Cesium.Math.toRadians(0), pitch: Cesium.Math.toRadians(-50), roll: 0 },
    duration: 0
  });
})();
</script>
</body>
</html>