Material Stripe

<!--
  示例：用条纹材质铺一块地面
  要点：StripeMaterialProperty 由 evenColor 与 oddColor 交替出条带，repeat 决定条数
  依赖：CesiumJS 1.121 · jsDelivr CDN，无外部图片
-->
<!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>条纹材质</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}
  input[type=range]{width:100%}
  .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>条纹材质</b></div>
  <div class="row">repeat <span id="rVal">16</span></div>
  <div class="row"><input id="repeat" type="range" min="2" max="48" step="2" value="16"></div>
  <div class="row">旋转 <span id="rotVal">0</span>°</div>
  <div class="row"><input id="rot" type="range" min="0" max="180" step="5" value="0"></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;

  /* 一块 2.6 公里见方的地面 */
  var poly = viewer.entities.add({
    polygon: {
      hierarchy: Cesium.Cartesian3.fromDegreesArray([
        116.372, 39.896,
        116.404, 39.896,
        116.404, 39.918,
        116.372, 39.918
      ]),
      height: 0,
      stRotation: 0,
      material: new Cesium.StripeMaterialProperty({
        evenColor: Cesium.Color.fromCssColorString('#2f6ea8'),
        oddColor: Cesium.Color.fromCssColorString('#1b2b3d'),
        repeat: 16,
        orientation: Cesium.StripeOrientation.HORIZONTAL
      })
    }
  });

  /* 一条斜穿条纹的参考线，方便判断旋转后的方向 */
  viewer.entities.add({
    polyline: {
      positions: Cesium.Cartesian3.fromDegreesArray([116.372, 39.896, 116.404, 39.918]),
      width: 1.5,
      material: new Cesium.PolylineDashMaterialProperty({
        color: Cesium.Color.fromCssColorString('#ffb13d').withAlpha(0.9),
        dashLength: 18
      }),
      clampToGround: true
    }
  });

  document.getElementById('repeat').addEventListener('input', function () {
    document.getElementById('rVal').textContent = this.value;
    poly.polygon.material.repeat = parseInt(this.value, 10);
  });

  document.getElementById('rot').addEventListener('input', function () {
    document.getElementById('rotVal').textContent = this.value;
    poly.polygon.stRotation = Cesium.Math.toRadians(parseFloat(this.value));
  });

  viewer.camera.flyTo({
    destination: Cesium.Cartesian3.fromDegrees(116.388, 39.884, 2400),
    orientation: {
      heading: Cesium.Math.toRadians(0),
      pitch: Cesium.Math.toRadians(-42),
      roll: 0
    },
    duration: 0
  });
})();
</script>
</body>
</html>