vue+cesium示例：3D热力图(附源码下载)

接到一位知识星友的邀请，随机模拟三维数据点，结合heatmap.js实现基于cesium+vue的3D热力图需求，适合学习Cesium与前端框架结合开发3D可视化项目。

demo源码运行环境以及配置

运行环境：依赖Node安装环境，demo本地Node版本:推荐v18+。

运行工具：vscode或者其他工具。

配置方式：下载demo源码，vscode打开，然后顺序执行以下命令：
（1）下载demo环境依赖包命令：npm install
（2）启动demo命令：npm run dev
（3）打包demo命令： npm run build

技术栈

Vue 3.5.13

Vite 6.2.0

Cesium 1.128.0

示例效果
在这里插入图片描述
核心源码

<template><div id="cesiumContainer" class="cesium-container"></div>
</template>
<script setup>
import { onMounted, onUnmounted, ref } from 'vue';
import * as Cesium from 'cesium';
Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiIxZjhjYjhkYS1jMzA1LTQ1MTEtYWE1Mi0zODc5NDljOGVkMDYiLCJpZCI6MTAzNjEsInNjb3BlcyI6WyJhc2wiLCJhc3IiLCJhc3ciLCJnYyJdLCJpYXQiOjE1NzA2MDY5ODV9.X7tj92tunUvx6PkDpj3LFsMVBs_SBYyKbIL_G9xKESA';
// 声明Cesium Viewer实例
let viewer = null;
// 组件挂载后初始化Cesium
onMounted(async () => {const files = ["./heatmap/heatmap.js"];loadScripts(files, function () {console.log("All scripts loaded");initMap();});
});
const loadScripts = (files, callback) => {// Make Cesium available globally for the scripts// window.Cesium = Cesium;if (files.length === 0) {callback();return;}const file = files.shift();const script = document.createElement("script");script.onload = function () {loadScripts(files, callback);};script.src = file;document.head.appendChild(script);
};
const initMap = async () => {// 初始化Cesium Viewerviewer = new Cesium.Viewer('cesiumContainer', {// 基础配置animation: false, // 动画小部件baseLayerPicker: false, // 底图选择器fullscreenButton: false, // 全屏按钮vrButton: false, // VR按钮geocoder: false, // 地理编码搜索框homeButton: false, // 主页按钮infoBox: false, // 信息框 - 禁用点击弹窗sceneModePicker: false, // 场景模式选择器selectionIndicator: false, // 选择指示器timeline: false, // 时间轴navigationHelpButton: false, // 导航帮助按钮navigationInstructionsInitiallyVisible: false, // 导航说明初始可见性scene3DOnly: false, // 仅3D场景terrain: Cesium.Terrain.fromWorldTerrain(), // 使用世界地形});// 隐藏logoviewer.cesiumWidget.creditContainer.style.display = "none";viewer.scene.globe.enableLighting = true;// 禁用大气层和太阳viewer.scene.skyAtmosphere.show = false;//前提先把场景上的图层全部移除或者隐藏 // viewer.scene.globe.baseColor = Cesium.Color.BLACK; //修改地图蓝色背景viewer.scene.globe.baseColor = new Cesium.Color(0.0, 0.1, 0.2, 1.0); //修改地图为暗蓝色背景// 设置抗锯齿viewer.scene.postProcessStages.fxaa.enabled = true;// 清除默认底图viewer.imageryLayers.remove(viewer.imageryLayers.get(0));// 加载底图 - 使用更暗的地图服务const imageryProvider = await Cesium.ArcGisMapServerImageryProvider.fromUrl("https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer");viewer.imageryLayers.addImageryProvider(imageryProvider);// 设置默认视图位置 - 默认显示全球视图// viewer.camera.setView({//   destination: Cesium.Cartesian3.fromDegrees(104.0, 30.0, 10000000.0), // 中国中部上空//   orientation: {//     heading: 0.0,//     pitch: -Cesium.Math.PI_OVER_TWO,//     roll: 0.0//   }// });// 启用地形深度测试，确保地形正确渲染viewer.scene.globe.depthTestAgainstTerrain = true;// 模拟数值const points = new Array(50).fill("").map(() => {return {lnglat: [116.46 + Math.random() * 0.1 * (Math.random() > 0.5 ? 1 : -1),39.92 + Math.random() * 0.1 * (Math.random() > 0.5 ? 1 : -1),],value: 1000 * Math.random(),};});// 创建热力图create3DHeatmap(viewer, {dataPoints: points,radius: 15,baseElevation: 0,primitiveType: "TRIANGLES",colorGradient: {".3": "blue",".5": "green",".7": "yellow",".95": "red",},});viewer.camera.flyTo({destination: Cesium.Cartesian3.fromDegrees(116.46, 39.92, 100000),orientation: {},duration: 3,});
}
// 组件卸载前清理资源
onUnmounted(() => {if (viewer) {viewer.destroy();viewer = null;}
});
/*** 创建三维热力图* @param {Cesium.Viewer} viewer 地图viewer对象* @param {Object} options 基础参数* @param {Array} options.dataPoints 热力值数组* @param {Array} options.radius 热力点半径* @param {Array} options.baseElevation 最低高度* @param {Array} options.colorGradient 颜色配置*/
function create3DHeatmap(viewer, options = {}) {const heatmapState = {viewer,options,dataPoints: options.dataPoints || [],containerElement: undefined,instanceId: Number(`${new Date().getTime()}${Number(Math.random() * 1000).toFixed(0)}`),canvasWidth: 200,boundingBox: undefined, // 四角坐标boundingRect: {}, // 经纬度范围xAxis: undefined, // x 轴yAxis: undefined, // y 轴xAxisLength: 0, // x轴长度yAxisLength: 0, // y轴长度baseElevation: options.baseElevation || 0,heatmapPrimitive: undefined,positionHierarchy: [],heatmapInstance: null,};if (!heatmapState.dataPoints || heatmapState.dataPoints.length < 2) {console.log("热力图点位不得少于3个！");return;}createHeatmapContainer(heatmapState);const heatmapConfig = {container: document.getElementById(`heatmap-${heatmapState.instanceId}`),radius: options.radius || 20,maxOpacity: 0.7,minOpacity: 0,blur: 0.75,gradient: options.colorGradient || {".1": "blue",".5": "yellow",".7": "red",".99": "white",},};heatmapState.primitiveType = options.primitiveType || "TRIANGLES";heatmapState.heatmapInstance = h337.create(heatmapConfig);initializeHeatmap(heatmapState);return {destroy: () => destroyHeatmap(heatmapState),heatmapState,};
}
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