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README
Apache-2.0

基于 Vue3.x 的 Mars3D🌎功能示例项目

GitHub stars Npm downloads Npm version

功能示例项目,是基于Mars3D 平台做的一个按每个单独功能进行单页面展示、并且支持修改编辑代码实时运行的一个演示功能的系统。 主要用于开发人员学习了解 Mars3D 每个功能的使用、用于业务人员了解体验 Mars3D 具备的功能点。

首先建议您学习浏览一遍我们功能示例的源码(源码中会有大量注释),阅读源码时可以结合查阅API文档来理解类及方法的作用和参数说明等。

项目介绍

这是一个基于Vue3.0开发的 Mars3D 功能示例 演示项目。

如果您不熟悉Vue,也可以阅读:功能示例原生JS版功能示例React版

项目特性

  • 最新技术栈:使用 Vue3/Vite 等前端前沿技术开发
  • TypeScript: 应用程序级 JavaScript 的语言

视频讲解

建议先看一遍视频讲解,再实际操作,您可以新页面查看高清视频

下载运行项目

下载代码

git clone git@github.com:marsgis/mars3d-vue-example.git
  • Gitee:国内码云,下载速度快些。
git clone git@gitee.com:marsgis/mars3d-vue-example.git

运行环境

  • 推荐使用 vscode,安装参考开发环境搭建教程
  • 安装 vscode 插件,推荐安装 volar(并禁用 vetur)、ESlint 、 Prettier
  • 配置 vscode 参数, setting.json 相关配置
{
  "eslint.format.enable": true,
  "[json]": {
    "editor.defaultFormatter": "esbenp.prettier-vscode"
  },
  "[typescript]": {
    "editor.defaultFormatter": "esbenp.prettier-vscode"
  },
  "[javascript]": {
    "editor.defaultFormatter": "esbenp.prettier-vscode"
  },
  "[html]": {
    "editor.defaultFormatter": "esbenp.prettier-vscode"
  },
  "[vue]": {
    "editor.defaultFormatter": "esbenp.prettier-vscode"
  }
}

运行命令

请将机器Node版本升级到v16及以上版本

首次运行前安装依赖

npm install

//或使用代理
npm i --registry=http://registry.taobao.org

启动开发环境

npm run serve

编译构建

npm run build //编译后生成在dist目录,拷贝出去发布即可
npm run serve:dist  //测试dist运行状态

// 或者将dist文件夹发布在自己的服务数据上

运行效果

在线体验

image

如何反馈问题?

  • 发现您发现项目中存在的问题或者需要优化的地方;
  • 如果您有一些自己全新编写的示例,希望也开源与大家分享。

提交方式:

  • 欢迎在github或gitee上提交PR
  • 如果对git不熟悉,也可以整理示例代码发送邮件到 wh@marsgis.cn 由我们来整理集成。

项目架构

技术选型

需要有一定的知识储备,包括 vue3.0 中的 composition Api 模式等,建议浏览下Web前端知识视频讲解

主要目录说明

mars3d-vue-example
└───src                 主要项目代码
│   └───components      vue组件代码【重要】
│   └───example         示例代码【重要】
│   └───misc            主要存放ts相关的模块定义
│   └───pages           页面入口
│   └───styles          样式文件
│   └───utils           工具方法
└───public              无需编译构建的静态资源【重要】
│   └───config          项目和功能的配置文件
│   └───img             图片资源
│   └───lib             示例依赖资源
│   └───temp            示例的公共基础代码
│───.eslintrc.js        eslint配置文件
│─── package.json       项目配置信息
└─── vite.config.ts     vite 配置文件
└─── index.html         列表页入口
└─── editor-vue.html        编辑器页面入口

与示例相关的3个主要目录是:src\examplepublicsrc\components(部分功能依赖)。

示例主目录

  • 位置 src/example
  • 项目中的每一个示例对应了本目录下的一个 map.js 文件,如果包含 ui 面板,需要创建一个 index.vue
  • 一些情况下可以将 example 视为 public 下的一个目录

依赖资源

配置的依赖会在html中按配置顺序加载,注意配置时依赖之间的先后顺序。

  1. libs 依赖,公共的通用依赖,统一放在public/lib/目录下,并由includeLibs.js统一配置。 libs中通常会是一些开源的 js 库,如果示例只依赖 mars3d 相关资源,可省略libs字段。
{
  "name": "天地图地形",
  "main": "terrain/terrainTDT",
  "hasPannel": true,
  "libs": ["mars3d", "mars3d-tdt"],
  "thumbnail": "b10_terrain_tdt.jpg"
}

通过 includeLibs.js 中的 isLocal 变量,手动控制使用本地资源,还是 CDN 资源

  1. resources 依赖,一些个性化的资源,在开发过程中提取封装的文件的依赖资源,比如只是单个示例本身使用的一些js、css文件。
{
  "name": "POI兴趣点搜索(Cesium原生)",
  "main": "control/cesium/geocoder",
  "resources": ["cesiumControl.css"],
  "thumbnail": "d10_geocoder.jpg"
}

同级目录下只需要配置文件名,不在同级目录的 需配置打包后文件位置的绝对路径如 /example/graphic/apply/typhoon/Typhoon.js

单个示例的内部结构

每个示例都是一个单独的文件夹,均放在src\example示例目录下的子目录,因为示例众多,建议多级目录来管理。

示例相关文件

示例目录下,一般有2个文件(地图业务与UI解耦):

  • map.js文件:涉及地图业务的操作均写在 map.js 中;

  • index.vue 文件:是一个Vue组件面板,涉及 UI 层面、和地图无关的操作均写在 index.vue 中;

内部构流程图

示例的内部构造处理流程图:

image

添加新的示例

下面我们以src\example\map\sample\为示例说明。

1. 配置文件 example.json 中修改配置

public/config/example.json 中加上对应的配置项,这样就能在示例列表页面看到对应的示例卡片。

{
  "name": "示例名称",
  "main": "map/sample", //示例的相对路径
  "hasPannel": true, // 可选参数,表示是否存在ui面板,默认false
  "libs": [], // 通用依赖项,可选参数 默认 ["mars3d"]
  "resources": ["cesiumControl.css"], // 个性化依赖项, 可选参数,默认 []
  "thumbnail": "thumbnail.jpg" // 缩略图可选, 默认为 thumbnail.jpg
}

注:上述配置mainsrc\example下的相对路径

2. 新建示例对应目录

src\example示例目录下新建对应示例的子目录,因为示例众多,建议多级目录来管理,当前我们新建了src\example\map\sample\目录。

3. 新建 map.js 地图业务文件

在目录下新建map.js(文件名固定不可修改)主入口文件 map.js 主要用于处理地图相关业务。 在文件中必须加上 initMap 方法来初始化地球和相关业务,比如:

最简结构如下

var map
// 事件对象,用于抛出事件给面板
var eventTarget = new mars3d.BaseClass()

// 构造地图主方法【必须】
function initMap(options) {
  // 创建三维地球场景
  map = new mars3d.Map("mars3dContainer", options)
}

在 map.js 中 存在以下全局方法, 并且已经预先加载了 mar3d 相关依赖

globalMsg(msg, type, ...args) // message
globalAlert(msg, title, ...args) // alert
globalNotify(msg, disc, ...args) // notify
showLoading(type) // 显示loading
hideLoading(type) // 关闭loading

完成后我们即可访问 http://localhost:8080/editor-vue.html?id=map/sample来查看示例的效果。

4. (按需可选)配置其他依赖资源

按示例本身需要来配置 libs 和 resources 依赖。

5. (按需可选)新建index.vue业务窗口面板

在目录下新增index.vue文件,该文件主要是用于 UI 面板相关的业务代码。 创建控件 Vue 面板,可以参考已有示例加上相关业务面板。

同时在 example.json 中的对应示例增加配置hasPannel:true

最简模板如下:

<template>
  <mars-dialog> </mars-dialog>
</template>
<script lang="ts" setup></script>
<style scoped lang="less"></style>

5.1. index.vue面板操作map.js内地图相关对象时。

需要在 vue 中加上下面代码进行访问

index.vue 文件中:

// mapWork是map.js内定义的所有对象,目前在示例框架中做好了封装传递过来的。
const mapWork = window.mapWork

// 滑动条修改事件
const onSliderChange = () => {
  mapWork.updateBrightness(formState.brightness)
}

map.js 文件中:

// map.js中
function updateBrightness(val) {
  bloomEffect.brightness = val
}

5.2. map.js地图业务中需要操作index.vue面板时。

map.js 文件中:

// 抛出事件
var eventTarget = new mars3d.BaseClass()

//完成操作或取到相关数据后
eventTarget.fire("loadOk", { 需要传递到vue中使用的对象 })

index.vue 文件中:

// 取到js中的数据
mapWork.eventTarget.on("loadOk", function (event: any) {})

5.3. map.jsindex.vue各自代码业务分离的原则

原则:

  • 涉及地图业务的操作均写在 map.js 中
  • 涉及 UI 层面、和地图无关的操作均写在 index.vue 中,vue 中不得使用 mars3d 和 Cesium 开头的类(组件中出除外)

如何区分?

  • 删除 index.vue 时不影响地图本身业务,map.js 需要正常运行 !!!
  • 删除 map.js 时,index.vue 需要正常展示 UI(除 mapWork 相关操作无响应外) !!!

阅读示例源码和调试学习

示例的目的是演示平台的每个功能点,可以按需求或兴趣去学习每一个示例,

  • (1)学习中可以查询相关类的 API 文档
  • (2)尝试修改源码中参数、方法等,来体验不同的呈现效果。

开发中常见问题

1. 局域网离线使用时注意事项

平台所有代码层面来说支持离线运行和使用的,但需要注意的是离线时的地图服务的相关处理。

如果局域网内有相关地形、卫星底图服务可以按内网服务类型和 URL 地址替换下config.json构造Map的代码中的默认地形和底图。

如果局域网内没有相关服务,可以按下面处理:

  • 修改 config.json 中terrain配置中,将已有的"show": true配置,改为"show": false
  • 修改 config.json 中basemaps数组配置中,将已有的"show": true的图层,将该值改为"show": false ,并将单张图片或离线地图加上"show": true,并修改相关 URL 地址。
  • 您也可以参考教程发布三维数据服务进行部署离线地图服务,里面也有一些示例离线数据。

2. src\example\中增加的资源访问 404

因为新增静态资源涉及拷贝,需要重启服务 npm run serve

Mars3D 是什么

Mars3D平台火星科技研发的一款基于 WebGL 技术实现的三维客户端开发平台,基于Cesium优化提升与 B/S 架构设计,支持多行业扩展的轻量级高效能 GIS 开发平台,能够免安装、无插件地在浏览器中高效运行,并可快速接入与使用多种 GIS 数据和三维模型,呈现三维空间的可视化,完成平台在不同行业的灵活应用。

Mars3D 平台可用于构建无插件、跨操作系统、 跨浏览器的三维 GIS 应用程序。平台使用 WebGL 来进行硬件加速图形化,跨平台、跨浏览器来实现真正的动态大数据三维可视化。通过 Mars3D 产品可快速实现浏览器和移动端上美观、流畅的三维地图呈现与空间分析。

相关网站

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mars3d功能示例,Vue版本 展开 收起
JavaScript 等 6 种语言
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