Cesium快速入门

来源

该案例源码来自Cesium-Examples，素材在源码/src/Basics/timeMap目录下。也可从Cesium-Examples中获取。
思路

该案例通过加载一系列静态图片，模拟了一个时间序列的变化效果。初始化时，加载一系列静态图片作为时间序列图层，并通过定时器控制图层的透明度变化，从而实现动态效果。
效果

源码

vue
<template>
  <div ref="cesiumContainer" style="width: 100%; height: 90vh"></div>
  <div style="position: absolute; left: 20px; top: 20px; z-index: 1000">
    <button @click="openTimeMap()">开启</button>
    <button @click="closeTimeMap()">关闭</button>
  </div>
</template>

<script setup>
import { ref, onMounted } from "vue";
import * as Cesium from "cesium";
const cesiumContainer = ref(null);
let viewer = null;

const arrTileLayer = [];
let mapTimer = null;
let currentTimeMapIndex = 0;

onMounted(async () => {
  // 初始化Viewer
  viewer = new Cesium.Viewer(cesiumContainer.value, {
    geocoder: false, // 关闭地理编码搜索
    homeButton: false, // 关闭主页按钮
    sceneModePicker: false, // 关闭场景模式选择器
    baseLayerPicker: false, // 关闭底图选择器
    navigationHelpButton: false, // 关闭导航帮助
    animation: false, // 关闭动画控件
    timeline: false, // 关闭时间轴
    fullscreenButton: false, // 关闭全屏按钮
    // selectionIndicator: false,
    // infoBox: false,
    // 开启地形
    // terrainProvider: await Cesium.createWorldTerrainAsync({
    //   requestVertexNormals: true, // 真实光照效果
    //   requestWaterMask: true, // 真实水面流动效果
    // }),
  });

  // -------------------------------
  // 动态时序图
  viewer.camera.flyTo({
    destination: Cesium.Cartesian3.fromDegrees(
      110.511154,
      29.362943,
      5531517.4
    ),
    duration: 2,
    orientation: {
      heading: Cesium.Math.toRadians(348.3), // 水平旋转，围绕Y轴，0为正北方向
      pitch: Cesium.Math.toRadians(-89.8), // 上下旋转，围绕X轴，-90为俯视地面
      roll: 0.0, // 视口的翻滚角度，围绕Z轴，0为不翻转
    },
  });

  initTimeMap();

  // -------------------------------

  // ================================================

  viewer.cesiumWidget.creditContainer.style.display = "none";
});

// 开启
function openTimeMap() {
  closeTimeMap();
  mapTimer = setInterval(() => {
    if (currentTimeMapIndex > arrTileLayer.length) {
      currentTimeMapIndex = 0;
    }
    currentTimeMapIndex++;

    const layer1 = arrTileLayer[currentTimeMapIndex - 1];
    if (layer1) {
      layer1.alpha = 0;
    }
    const layer2 = arrTileLayer[currentTimeMapIndex];
    if (layer2) {
      layer2.alpha = 1;
    }
  }, 300);
}
// 关闭
function closeTimeMap() {
  clearInterval(mapTimer);
  try {
    arrTileLayer[currentTimeMapIndex].alpha = 0;
    currentTimeMapIndex = 0;
  } catch (error) {}
}
function initTimeMap() {
  const urlArr = [
    "/src/cesium/timeMap/20200522145400_20200522145400_0c972b7abe4f4b4fbdbe909f5c1ca17a.png",
    "/src/cesium/timeMap/20200522145400_20200522150000_55c4adac7ac8460db3d893866897bd6d.png",
    "/src/cesium/timeMap/20200522145400_20200522150600_ca075253d90e40049f069d22a1a3ce3d.png",
    "/src/cesium/timeMap/20200522145400_20200522151200_afe188f5892d4dd8a4d09d94c746ce1f.png",
    "/src/cesium/timeMap/20200522145400_20200522151800_b10b132f2d52424e9ab55a61896e86b0.png",
    "/src/cesium/timeMap/20200522145400_20200522152400_4ad54289d6f64f5aaa160f453a99b14a.png",
    "/src/cesium/timeMap/20200522145400_20200522153000_cf72453eba0b4b33966f69899771ba16.png",
    "/src/cesium/timeMap/20200522145400_20200522153600_c3aac59805ec433bae08bc8d77d25d20.png",
    "/src/cesium/timeMap/20200522145400_20200522154200_42a885bb66144e698190c38d02b3be96.png",
    "/src/cesium/timeMap/20200522145400_20200522154800_4564689c557e43ff993ad0113363bd6d.png",
    "/src/cesium/timeMap/20200522145400_20200522155400_4742e31563464542a533a43d5414a7ae.png",
    "/src/cesium/timeMap/20200522145400_20200522160000_487da64a0f384795848e60f2ed343500.png",
    "/src/cesium/timeMap/20200522145400_20200522160600_9a1cf5da2f2c46158f113c057b9bb079.png",
    "/src/cesium/timeMap/20200522145400_20200522161200_76861453df20413fa1eff57c8c938758.png",
    "/src/cesium/timeMap/20200522145400_20200522161800_767d25a128e94d968522badfaf071a66.png",
    "/src/cesium/timeMap/20200522145400_20200522162400_8b949a9d47fd4f289bd51afe9e009ab9.png",
    "/src/cesium/timeMap/20200522145400_20200522163000_9f234335ae2c42ac91d5dfc62b72f3db.png",
    "/src/cesium/timeMap/20200522145400_20200522163600_a808919c4a5a4142b188520a74dacf75.png",
    "/src/cesium/timeMap/20200522145400_20200522164200_248688f96cfd438eb5229812dfb748c3.png",
    "/src/cesium/timeMap/20200522145400_20200522164800_797dd13e0a304fbe934fee1902b7fc21.png",
    "/src/cesium/timeMap/20200522145400_20200522165400_0be5ef511d6c467288ec9f7b961821bd.png",
    "/src/cesium/timeMap/20200522145400_20200522170000_a1820b8d4527467a85db7fee3b352bbb.png",
    "/src/cesium/timeMap/20200522145400_20200522170600_964ada943fcf4a13aa59364b1efd0b1b.png",
  ];

  for (let i = 0, len = urlArr.length; i < len; i++) {
    var imageryProvider = new Cesium.SingleTileImageryProvider({
      url: urlArr[i],
      rectangle: Cesium.Rectangle.fromDegrees(
        63.8148899733,
        12.7700338517,
        143.536486117,
        56.3833398551
      ),
      tileWidth: 0,
      tileHeight: 0,
    });

    let options = {
      alpha: 0,
    };
    var imageryLayer = new Cesium.ImageryLayer(imageryProvider, options);
    viewer.imageryLayers.add(imageryLayer);

    arrTileLayer.push(imageryLayer);
  }
}
</script>
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源码 ​

来源

思路

效果

源码
