Create a 3D visualization application using PHP and Three.js

With the continuous development of Internet technology, the needs of Web applications are no longer limited to traditional 2D page display and data interaction. Now more and more applications need to use 3D visualization technology to present data and scenes, such as 3D games, 3D modeling, physics simulation, etc.

In this article, we will introduce how to use PHP and Three.js to create a 3D visualization application. We will explain in detail from three aspects: first, we will explain the basic concepts of Three.js and how to introduce it in web applications; then, we will use an example of a 3D scene to show how to use Three.js to create 3D models and scenes, and how to render and interact with them; finally, we will introduce how to use PHP to control and manage this 3D application, including data processing, interactive operations, etc.

1. Three.js introduction and introduction

Three.js is a JavaScript library based on WebGL and Canvas for creating and rendering 3D graphics and scenes. It provides a set of powerful and easy-to-use APIs that allow web application developers to easily create and display 3D scenes in web pages without in-depth knowledge of the underlying rendering technology.

Three.js can be introduced in a web application by directly downloading and introducing source code files, or using a package management tool like npm to install and manage. In this article, we will adopt the latter approach and introduce Three.js by introducing the npm package.

Here is a simple example showing how to introduce Three.js in a web application:

// 在 HTML 文件中引入 Three.js
<script src="https://cdn.jsdelivr.net/npm/three@0.127.0/build/three.min.js"></script>

// 或者在 JavaScript 文件中使用 npm 包管理工具来引入 Three.js
import * as THREE from "three";

2. Create 3D scenes and models using Three.js

In Three.js, creating and displaying 3D scenes requires following certain processes and steps. In this section, we will demonstrate this process through a simple example and introduce some basic concepts and techniques involved.

First, we need to create a scene object and set up the corresponding renderer and camera:

// 创建场景对象
const scene = new THREE.Scene();

// 创建渲染器
const renderer = new THREE.WebGLRenderer();

// 创建摄像机
const camera = new THREE.PerspectiveCamera(
  75, // 视角角度
  window.innerWidth / window.innerHeight, // 纵横比
  0.1, // 近裁剪面
  1000 // 远裁剪面
);

Then, we can create a variety of geometry and materials and add them to In the scene:

// 创建一个球体
const geometry = new THREE.SphereGeometry(1, 32, 32);

// 创建一个材质
const material = new THREE.MeshBasicMaterial({
  color: 0xffffff,
  wireframe: true,
});

// 创建一个网格对象，并且将球体和材质添加进去
const sphere = new THREE.Mesh(geometry, material);

// 将网格对象添加到场景中
scene.add(sphere);

Finally, we need to set up the camera and renderer, and render the scene at the appropriate time:

// 设置摄像机位置和朝向
camera.position.z = 5;

// 设置渲染器大小和清除色
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setClearColor(0x000000);

// 在每一帧更新场景
const animate = () => {
  requestAnimationFrame(animate);

  sphere.rotation.x += 0.01;
  sphere.rotation.y += 0.01;

  renderer.render(scene, camera);
};

// 渲染场景
animate();

Through the above example, we can understand how to use Three.js to Create a simple 3D scene and display a sphere object in it, rotating it every frame.

3. Use PHP to control and manage 3D applications

In addition to using Three.js to create and render 3D scenes, we can also use PHP to control and manage this 3D app. As a scripting language that runs on the Web server, PHP can facilitate data processing, interactive operations, etc. It can be combined with front-end JavaScript and Three.js to implement richer and more complex 3D applications.

In PHP, we can use a variety of technologies and tools to interact with front-end pages, including Ajax asynchronous requests, WebSocket real-time communication, RESTful API interfaces, etc. The following is a simple example that shows how to use PHP and JavaScript to implement a simple 3D application, including data processing and interactive operations:

// 在 PHP 脚本中处理数据，并且将其以 JSON 格式返回给前端
$data = array(
  "name" => "sphere",
  "position" => array("x" => 0, "y" => 0, "z" => 0),
  "rotation" => array("x" => 0, "y" => 0, "z" => 0),
);

header("Content-Type: application/json");
echo json_encode($data);

// 在 JavaScript 代码中使用 Ajax 请求 PHP 脚本，并且解析返回的数据
const xhr = new XMLHttpRequest();

xhr.addEventListener("load", () => {
  const data = JSON.parse(xhr.responseText);
  console.log(data);
});

xhr.open("GET", "./data.php");
xhr.send();

Through the above example, we can understand how to use PHP and JavaScript to implement data interaction, control and management of 3D applications.

To sum up, this article introduces in detail how to use PHP and Three.js to create 3D visualization applications, including introducing Three.js, using Three.js to create 3D scenes and models, and using PHP to control and Manage 3D applications. These technologies and tools can help developers create high-quality, rich, and highly interactive 3D applications more conveniently, providing new possibilities for the further development of Web applications.

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