官方示例：Cesium Sandcastlehttps://sandcastle.cesium.com/?src=Z-Indexing%20Geometry.html&label=Geometries

<template>
  <div style="height: 100vh">
    <div id="cesiumContainer" />
  </div>
</template>

<script>
export default {
  name: "test",
  data() {
    return {};
  },
  mounted() {
    const viewer = new Cesium.Viewer("cesiumContainer");

    viewer.entities.add({
      id: "Red rectangle, zIndex 1",
      rectangle: {
        coordinates: Cesium.Rectangle.fromDegrees(-110.0, 20.0, -100.5, 30.0),
        material: Cesium.Color.RED,
        zIndex: 1,
      },
    });

    viewer.entities.add({
      id: "Textured rectangle, zIndex 2",
      rectangle: {
        coordinates: Cesium.Rectangle.fromDegrees(-112.0, 25.0, -102.5, 35.0),
        material: "Cesium_Logo_Color.jpg",
        zIndex: 2,
      },
    });

    viewer.entities.add({
      id: "Blue rectangle, zIndex 3",
      rectangle: {
        coordinates: Cesium.Rectangle.fromDegrees(-110.0, 31.0, -100.5, 41.0),
        material: Cesium.Color.BLUE,
        zIndex: 3,
      },
    });

    viewer.entities.add({
      id: "Textured rectangle, zIndex 3",
      rectangle: {
        coordinates: Cesium.Rectangle.fromDegrees(-99.5, 20.0, -90.0, 30.0),
        material: "Cesium_Logo_Color.jpg",
        zIndex: 3,
      },
    });

    viewer.entities.add({
      id: "Green rectangle, zIndex 2",
      rectangle: {
        coordinates: Cesium.Rectangle.fromDegrees(-97.5, 25.0, -88.0, 35.0),
        material: Cesium.Color.GREEN,
        zIndex: 2,
      },
    });

    viewer.entities.add({
      id: "Blue rectangle, zIndex 1",
      rectangle: {
        coordinates: Cesium.Rectangle.fromDegrees(-99.5, 31.0, -90.0, 41.0),
        material: Cesium.Color.BLUE,
        zIndex: 1,
      },
    });

    if (!Cesium.Entity.supportsPolylinesOnTerrain(viewer.scene)) {
      window.alert(
        "Polylines on terrain are not supported on this platform, Z-index will be ignored"
      );
    }

    if (!Cesium.Entity.supportsMaterialsforEntitiesOnTerrain(viewer.scene)) {
      window.alert(
        "Textured materials on terrain polygons are not supported on this platform, Z-index will be ignored"
      );
    }

    viewer.entities.add({
      id: "Polyline, zIndex 2",
      polyline: {
        positions: Cesium.Cartesian3.fromDegreesArray([
          -120.0, 22.0, -80.0, 22.0,
        ]),
        width: 8.0,
        material: new Cesium.PolylineGlowMaterialProperty({
          glowPower: 0.2,
          color: Cesium.Color.BLUE,
        }),
        zIndex: 2,
        clampToGround: true,
      },
    });

    viewer.zoomTo(viewer.entities);
  },
};
</script>