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展示三维空间

上一章回顾: 起步

  • 你学会了如何初始化环境。
  • 并且你书写了一段代码，虽然不知道这段代码干了什么，不过也顺利地完成了在屏幕渲染出一个三维空间。
本章你可以学习到
  • 了解什么是 Work。
  • 了解 parseWork(json) five.load(work) 是如何工作的。

准备工作​

和上一章节一样，我们新建一个目录（src/1.displaying-work）以及对应的 html 文件 以及 js 或 ts 文件。

jsx 或 tsx 文件可以先拷贝上一章节的内容。

src/1.displaying-work/index.html
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <link rel="icon" href="data:;base64,iVBORw0KGgo=" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>展示空间 | Display a work</title>
    <style>
      * {
        margin: 0;
        padding: 0;
      }
      html,
      body #app {
        width: 100%;
        height: 100%;
        overflow: hidden;
      }
    </style>
  </head>
  <body>
    <div id="app"></div>
    <script type="module" src="./index"></script>
  </body>
</html>
src/1.displaying-work/index.js
import { Five, parseWork } from "@realsee/five";

const workURL =
  "https://vrlab-public.ljcdn.com/release/static/image/release/five/work-sample/07bdc58f413bc5494f05c7cbb5cbdce4/work.json";

const five = new Five();

five.appendTo(document.querySelector("#app"));

fetch(workURL)
  .then((res) => res.json())
  .then((json) => {
    const work = parseWork(json);
    five.load(work);
  });

window.addEventListener("resize", () => five.refresh(), false);

export {};

启动服务 npm run dev。 并跳转到当前页面 " http://localhost:3000/src/1.displaying-work.index.html "。

提示

请查看你的控制台，端口号会因为你的配置以及当前端口占用情况变更，请已控制台输出的为准。
如果你使用其他开发构建工具，请按照自己的开发构建工具的要求启动服务。

什么是 Work​

接下来停下写代码的双手，我们来理解一些概念，放心很简单。

Work 简介​

我们将一个 三维空间 叫做一个 Work。 那么一个 Work 是通过 JSON 的结构体描述的，称之为 work.json。 Work 你可以通过如视开放平台接口获取。 也可以像本次示例一样将之静态化使用。

Five 提供了 parseWork 的方法，用于解析 work.json，然后便可以得到 Work 对象。 将 Work 对象传入 load 方法中就可以初始化场景。你在上一章也是这么做的。

work 的使用限制​

你需要在如视开发者中心配置你的 安全域名 以及 Work 数据的 可用时间。 在生产环境中使用 Five 对对此做校验来保护开发者以及如视的数据安全。

在以下情况不会校验上述限制，便于开发和测试：

  • 域名为 localhost。
  • 域名为 ip 地址，如 127.0.0.1、192.168.0.5、 172.30.2.0、 10.33.10.2 等。
  • 在非 http 情况下访问，比如 file:// 协议下。

work.json的数据样例及数据说明​

你并不需要了解 work.json 的内容也可能很好的使用 Five。 虽然多了解一些，也不是坏事。

点击查看work.json
{
  "_signature": "LLzk2WHDbRfzQ5R+v82uVQqAGWMPfvgQ05hTwxgWKGeXbTPKtoQ8eI6FmCxJjtVjQW+wuZmZfxpzXePv4MGrWidG/05i5RRSELlPLEFZN3qYPykJLEIYhg3Wtvr8XkOI8wdeMgV82CP4Hyi84k/W2g+S+HcFs5oXfbfbFXPL/Gs=",
  "allow_hosts": ["*"],
  "base_url": "https://vrlab-public.ljcdn.com/release/auto3dhd/9380ce27b46cbc5ba8d47fcf0e4c9e4f/",
  "certificate": "-----BEGIN CERTIFICATE-----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\nI7AIgzhqK1Ku/IXK0OSXJonn+/9X/VI=\n-----END CERTIFICATE-----",
  "create_time": "2020-07-29T15:18:06+08:00",
  "expire_at": "2132653492169",
  "initial": {
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    "fov": 95,
    "heading": 0,
    "latitude": 0,
    "longitude": 5.58602282229265,
    "pano": 4,
    "pano_index": 4
  },
  "model": {
    "file_url": "model/auto3d-syVb5hzy8ZL1gZut_VvGDo.at3d",
    "material_base_url": "materials/",
    "material_textures": [
      "texture_0.jpg",
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    "modify_time": "2020-07-29T15:37:17+08:00",
    "type": 0
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        "front": "images/cube_2048/6/b8f425e5f8943c38ad1386ab391b54bc/6_f.jpg",
        "index": 6,
        "left": "images/cube_2048/6/b8f425e5f8943c38ad1386ab391b54bc/6_l.jpg",
        "right": "images/cube_2048/6/b8f425e5f8943c38ad1386ab391b54bc/6_r.jpg",
        "up": "images/cube_2048/6/b8f425e5f8943c38ad1386ab391b54bc/6_u.jpg"
      },
      {
        "back": "images/cube_2048/7/a05b06a01171babb1aceb5aad8406ab8/7_b.jpg",
        "down": "images/cube_2048/7/a05b06a01171babb1aceb5aad8406ab8/7_d.jpg",
        "front": "images/cube_2048/7/a05b06a01171babb1aceb5aad8406ab8/7_f.jpg",
        "index": 7,
        "left": "images/cube_2048/7/a05b06a01171babb1aceb5aad8406ab8/7_l.jpg",
        "right": "images/cube_2048/7/a05b06a01171babb1aceb5aad8406ab8/7_r.jpg",
        "up": "images/cube_2048/7/a05b06a01171babb1aceb5aad8406ab8/7_u.jpg"
      },
      {
        "back": "images/cube_2048/8/2cd717b9c97f48ae79511855cc7e5138/8_b.jpg",
        "down": "images/cube_2048/8/2cd717b9c97f48ae79511855cc7e5138/8_d.jpg",
        "front": "images/cube_2048/8/2cd717b9c97f48ae79511855cc7e5138/8_f.jpg",
        "index": 8,
        "left": "images/cube_2048/8/2cd717b9c97f48ae79511855cc7e5138/8_l.jpg",
        "right": "images/cube_2048/8/2cd717b9c97f48ae79511855cc7e5138/8_r.jpg",
        "up": "images/cube_2048/8/2cd717b9c97f48ae79511855cc7e5138/8_u.jpg"
      },
      {
        "back": "images/cube_2048/9/0b634fe985df7011472b81c75babfd95/9_b.jpg",
        "down": "images/cube_2048/9/0b634fe985df7011472b81c75babfd95/9_d.jpg",
        "front": "images/cube_2048/9/0b634fe985df7011472b81c75babfd95/9_f.jpg",
        "index": 9,
        "left": "images/cube_2048/9/0b634fe985df7011472b81c75babfd95/9_l.jpg",
        "right": "images/cube_2048/9/0b634fe985df7011472b81c75babfd95/9_r.jpg",
        "up": "images/cube_2048/9/0b634fe985df7011472b81c75babfd95/9_u.jpg"
      },
      {
        "back": "images/cube_2048/10/40c1a6463b8c7462aadfca2a5f80f685/10_b.jpg",
        "down": "images/cube_2048/10/40c1a6463b8c7462aadfca2a5f80f685/10_d.jpg",
        "front": "images/cube_2048/10/40c1a6463b8c7462aadfca2a5f80f685/10_f.jpg",
        "index": 10,
        "left": "images/cube_2048/10/40c1a6463b8c7462aadfca2a5f80f685/10_l.jpg",
        "right": "images/cube_2048/10/40c1a6463b8c7462aadfca2a5f80f685/10_r.jpg",
        "up": "images/cube_2048/10/40c1a6463b8c7462aadfca2a5f80f685/10_u.jpg"
      },
      {
        "back": "images/cube_2048/11/9663b7885a119f2f06da06212986bc9b/11_b.jpg",
        "down": "images/cube_2048/11/9663b7885a119f2f06da06212986bc9b/11_d.jpg",
        "front": "images/cube_2048/11/9663b7885a119f2f06da06212986bc9b/11_f.jpg",
        "index": 11,
        "left": "images/cube_2048/11/9663b7885a119f2f06da06212986bc9b/11_l.jpg",
        "right": "images/cube_2048/11/9663b7885a119f2f06da06212986bc9b/11_r.jpg",
        "up": "images/cube_2048/11/9663b7885a119f2f06da06212986bc9b/11_u.jpg"
      },
      {
        "back": "images/cube_2048/12/01f84f2edd8642d0bf5e4874d01a28ac/12_b.jpg",
        "down": "images/cube_2048/12/01f84f2edd8642d0bf5e4874d01a28ac/12_d.jpg",
        "front": "images/cube_2048/12/01f84f2edd8642d0bf5e4874d01a28ac/12_f.jpg",
        "index": 12,
        "left": "images/cube_2048/12/01f84f2edd8642d0bf5e4874d01a28ac/12_l.jpg",
        "right": "images/cube_2048/12/01f84f2edd8642d0bf5e4874d01a28ac/12_r.jpg",
        "up": "images/cube_2048/12/01f84f2edd8642d0bf5e4874d01a28ac/12_u.jpg"
      },
      {
        "back": "images/cube_2048/13/e9ce1249af9000a33d566c653560c3d6/13_b.jpg",
        "down": "images/cube_2048/13/e9ce1249af9000a33d566c653560c3d6/13_d.jpg",
        "front": "images/cube_2048/13/e9ce1249af9000a33d566c653560c3d6/13_f.jpg",
        "index": 13,
        "left": "images/cube_2048/13/e9ce1249af9000a33d566c653560c3d6/13_l.jpg",
        "right": "images/cube_2048/13/e9ce1249af9000a33d566c653560c3d6/13_r.jpg",
        "up": "images/cube_2048/13/e9ce1249af9000a33d566c653560c3d6/13_u.jpg"
      }
    ]
  },
  "picture_url": "https://vrlab-public.ljcdn.com/release/auto3dhd/9380ce27b46cbc5ba8d47fcf0e4c9e4f/screenshot/1596005211_4/pc0_3aoiit6zp.jpg",
  "title_picture_url": "https://vrlab-public.ljcdn.com/release/auto3dhd/9380ce27b46cbc5ba8d47fcf0e4c9e4f/screenshot/1596005211_4/pc1_iQLf2N6a6_1.jpg",
  "vr_code": "8054djM0oR6ky3Ey8e"
}

  • _signature / certificate: work 内容的数字签名

  • expire_at: work 的过期时间

  • allow_hosts: work 的安全域名

  • initial: 初始化数据，是一个 State 数据。描述 Work 被加载初始状态的位姿，也叫做 VR 的初始视角

    • mode: 模态
    • pano_index: 初始化点位
    • longitude: 相机的水平角
    • latitude: 相机的偏航角
    • fov: 相机垂直方向的可视角度

  • model: 三维模型

    • file_url: 三维模型的资源地址，文件为 .at3d 为如视定制的模型格式
    • material_textures: 三维模型的贴图资源地址

  • panorama: 全景彩色信息

    • list:
      • up / down / left / right / front / back: 全景彩色信息以 cubemap 方式存储和使用。

  • observers: 采集点信息

    • visible_nodes: 采集点之间的可见性列表
    • accessible_nodes: 采集点之间的连通性列表
    • quaternion: 采集点与模型坐标的旋转偏移量
    • standing_position: 采集点地面坐标
    • position: 采集点坐标
    • floor_index: 采集点楼层

Work 对象​

相比上面的 work.json, 你可能更常用到的是 Work 对象，他是 parseWork 函数的产物。 Work 对象 相比 work.json 会做很好的序列化，你可以在 Five API 文档 中查看详细说明。

多种展示模态​

Five 内置了多种模态，默认状态展示的是 全景态，就和上一章最终得到的结果一样，我们还可以展示 模型态 来查看三维空间的宏观状态。切换我们会用到 Five SDK 提供的 state 属性， setState() 方法， stateChange 事件。详细的 State 相关内容会在下一章详细学习到，我们先来简单地实现一个模态控制按钮。

添加 ui 按钮​

为了减少示例代码复杂度，这边使用 Bootstrap 作为 UI 库，

src/1.displaying-work/index.html
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <link rel="icon" href="data:;base64,iVBORw0KGgo=" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>展示空间 | Displaying work</title>
    <!-- 添加 Bootstrap UI样式 -->
    <link
      href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.1/dist/css/bootstrap.min.css"
      rel="stylesheet"
      crossorigin="anonymous"
    />
    <link
      href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.5.0/font/bootstrap-icons.css"
      rel="stylesheet"
    />
    <style>
      html,
      body,
      #app {
        width: 100%;
        height: 100%;
        overflow: hidden;
      }
    </style>
  </head>
  <body>
    <div id="app"></div>
    <!-- 模式切换 -->
    <nav class="navbar fixed-bottom navbar-light bg-light">
      <div class="container-fluid justify-content-center">
        <div class="btn-group">
          <a href="javascript:;" class="btn btn-primary active js-Panorama"
            >全景漫游</a
          >
          <a href="javascript:;" class="btn btn-primary js-Floorplan"
            >空间总览</a
          >
        </div>
      </div>
    </nav>
    <script type="module" src="./index"></script>
  </body>
</html>

使用 setState 以及 stateChange 事件​

  • 通过 five.setState({ mode }) 可以让 Five 在不同模态下切换。
  • 通过 five.state.mode 可以让 Five 在不同模态下切换。
  • 通过 stateChange 事件可以监听 state 的变化，当然也包括 state.mode。
src/1.displaying-work/index.js
import { Five, parseWork } from "@realsee/five";

const workURL =
  "https://vrlab-public.ljcdn.com/release/static/image/release/five/work-sample/07bdc58f413bc5494f05c7cbb5cbdce4/work.json";

const five = new Five();

five.appendTo(document.querySelector("#app"));

fetch(workURL)
  .then((res) => res.json())
  .then((json) => {
    const work = parseWork(json);
    five.load(work);
  });

window.addEventListener("resize", () => five.refresh(), false);

{
  // === 模式切换 ===
  const buttons = {
    Panorama: document.querySelector(".js-Panorama"),
    Floorplan: document.querySelector(".js-Floorplan"),
  };

  for (const [modeName, element] of Object.entries(buttons)) {
    element.addEventListener(
      "click",
      () => {
        five.setState({ mode: modeName });
      },
      false
    );
  }

  five.on("stateChange", (state) => {
    for (const [modeName, element] of Object.entries(buttons)) {
      if (modeName === state.mode) {
        element.classList.add("active");
      } else {
        element.classList.remove("active");
      }
    }
  });
}

export {};

回到你的浏览器查看，会发现你的页面底部出现了控制条，点击不同的按钮 全景漫游 空间总览 可以让三维空间改变状态。

真不错 🥳 ！

下一章节你会学到​

下一章节你会学到
  • 了解什么是 State。
  • 如何改变三维空间观察的方向 / 位置。
  • 了解刚才的代码，比如 setState stateChange 的是如何工作的。
  • 通过 State 完成了自动环视的功能。
最后由 sansi.lcj 于 更新