Sharing of sample code for a project class written in three.js
This article mainly introduces to you the relevant information about a project class written based on three.js. The article introduces it in great detail through sample code. It has certain reference learning value for everyone's study or work. Friends who need it can follow Let’s learn together with the editor.
WebVR
Before we begin, let’s introduce WebVR. WebVR is an experimental Javascript API that allows HMDs (head-mounted displays) to connect to web apps while also being able to Accept location and motion information from these devices. This makes it possible to develop VR applications using Javascript (of course there are already many interface APIs that use Javascript as a development language, but this does not affect our excitement for WebVR). So that we can preview and experience it immediately, chrome on mobile devices already supports WebVR and allows the phone to be used as a simple HMD. The mobile phone can divide the screen into left and right eye vision and use the accelerometer, gyroscope and other sensors in the mobile phone. All you need to do may be to buy a cardboard. Not much to say below, let’s take a look at the main text of this article:
This is an article about how to create configurable three.js objects based on three.js
Project address
Writing a three.js base class
This is a Three.js base class created which contains scenes, cameras, renderers, and controllers And some methods
// VRcore.js
import * as THREE from 'three';
const OrbitControls = require('three-orbit-controls')(THREE)
let Scene, Camera, Renderer, Controls, loopID;
function createScene({domContainer = document.body, fov = 50,far = 1000}){
if (!(domContainer instanceof HTMLElement)) {
throw new Error('domContainer is not a HTMLElement!');
}
// 初始化 scene
Scene = new THREE.Scene();
// 初始化 camera
Camera = new THREE.PerspectiveCamera(fov, domContainer.clientWidth / domContainer.clientHeight, 1, far);
Camera.position.set( 200, 200, 200 );
Camera.lookAt(Scene.position);
Scene.add(Camera);
// 初始化 renderer
Renderer = new THREE.WebGLRenderer({ canvas: domContainer, antialias: true, alpha: true } );
Renderer.clear();
Renderer.setClearColor( 0xeeeeee, 1); // 更改渲染器颜色
Renderer.setSize(domContainer.clientWidth, domContainer.clientHeight);
Renderer.shadowMap.Enabled = true;
Renderer.setPixelRatio(domContainer.devicePixelRatio);
initVR();
}
function initVR() {
// 初始化控制器
Controls = new OrbitControls(Camera, Renderer.domElement);;
Controls.addEventListener('change', render);
Controls.enableZoom = true;
}
function render() {
Renderer.render(Scene, Camera);
}
function renderStart(callback) {
loopID = 0; // 记录循环几次，后面有与清除场景中的物体
if (loopID === -1) return;
let animate = function(){
loopID = requestAnimationFrame(animate);
callback();
Controls.update();
render();
}
animate();
}
// 暂停动画渲染
function renderStop() {
if (loopID !== -1) {
window.cancelAnimationFrame(loopID);
loopID = -1;
}
}
// 回收当前场景
function clearScene() {
for(let i = Scene.children.length - 1; i >= 0; i-- ) {
Scene.remove(Scene.children[i]);
}
}
// 清理页面
function cleanPage() {
renderStop();
clearScene();
}
export {
Scene,
Camera,
Renderer,
Controls,
createScene,
initVR,
renderStart,
renderStop,
clearScene,
cleanPage
}Create a VRpage base class
This is a VRpage base class. All those who need to create Three projects need to inherit this class and then generate a Three project
// VRpage.js
import * as THREE from 'three';
import * as VRcore from './VRcore.js';
export default class VRpage {
constructor(options) {
// 创建场景
VRcore.createScene(options);
this.start();
this.loadPage();
}
loadPage() {
VRcore.renderStart(() => this.update());
this.loaded();
}
initPage() {
this.loadPage();
this.start();
}
start() {}
loaded() {}
update() {}
}Generate a Three.js project
The following file is a class that inherits the VRpage class, and then we rewrite the start method and update method. In the start method, we A cube is added to the scene. The update method is a deformation animation we give to the cube. It will be combined with the renderStart method in VRcore.js to perform animation effects.
// page.js
import * as THREE from 'three';
import VRpage from '../../utils/VRpage.js';
import * as VRcore from '../../utils/VRcore.js';
export default class Page extends VRpage {
start() { // 启动渲染之前，创建场景3d模型
let geometry = new THREE.CubeGeometry(100,100,100);
let material = new THREE.MeshLambertMaterial( { color:0x0000ff} );
this.box = new THREE.Mesh(geometry,material);
this.box.position.set(3, -2, -3);
const PointLight = new THREE.PointLight(0xffffff);
PointLight.position.set(500, 500, 500);
const AmbientLight = new THREE.AmbientLight( 0x404040 ); // soft white light
VRcore.Scene.add(PointLight);
VRcore.Scene.add(AmbientLight);
VRcore.Scene.background = new THREE.Color( 0xeeeeee ); // 更改场景背景色
VRcore.Scene.add(this.box);
}
update() {
this.box.rotation.y += 0.01;
}
}Here I am using the react framework
// index.js
import React, { Component } from 'react';
import PropTypes from 'prop-types';
import Page from './Page.js';
class Oho extends Component {
constructor() {
super();
this.init = this.init.bind(this);
}
componentDidMount() {
const dom = document.querySelector('#Oho');
this.init(dom);
}
init(dom) {
const page = new Page({domContainer: dom});
}
render() {
return (
<p className="three-demo">
<canvas id="Oho" ref="camera"></canvas>
</p>
);
}
}
export default Oho;Related recommendations:
Three.js implements 3D model display
Example explanation of three.js loading obj model
Examples to explain Three.js loading external models
The above is the detailed content of Sharing of sample code for a project class written in three.js. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to implement an online speech recognition system using WebSocket and JavaScript
Dec 17, 2023 pm 02:54 PM
How to use WebSocket and JavaScript to implement an online speech recognition system Introduction: With the continuous development of technology, speech recognition technology has become an important part of the field of artificial intelligence. The online speech recognition system based on WebSocket and JavaScript has the characteristics of low latency, real-time and cross-platform, and has become a widely used solution. This article will introduce how to use WebSocket and JavaScript to implement an online speech recognition system.
WebSocket and JavaScript: key technologies for implementing real-time monitoring systems
Dec 17, 2023 pm 05:30 PM
WebSocket and JavaScript: Key technologies for realizing real-time monitoring systems Introduction: With the rapid development of Internet technology, real-time monitoring systems have been widely used in various fields. One of the key technologies to achieve real-time monitoring is the combination of WebSocket and JavaScript. This article will introduce the application of WebSocket and JavaScript in real-time monitoring systems, give code examples, and explain their implementation principles in detail. 1. WebSocket technology
How to use JavaScript and WebSocket to implement a real-time online ordering system
Dec 17, 2023 pm 12:09 PM
Introduction to how to use JavaScript and WebSocket to implement a real-time online ordering system: With the popularity of the Internet and the advancement of technology, more and more restaurants have begun to provide online ordering services. In order to implement a real-time online ordering system, we can use JavaScript and WebSocket technology. WebSocket is a full-duplex communication protocol based on the TCP protocol, which can realize real-time two-way communication between the client and the server. In the real-time online ordering system, when the user selects dishes and places an order
Oracle DECODE function detailed explanation and usage examples
Mar 08, 2024 pm 03:51 PM
The DECODE function in Oracle is a conditional expression that is often used to return different results based on different conditions in query statements. This article will introduce the syntax, usage and sample code of the DECODE function in detail. 1. DECODE function syntax DECODE(expr,search1,result1[,search2,result2,...,default]) expr: the expression or field to be compared. search1,
How to implement an online reservation system using WebSocket and JavaScript
Dec 17, 2023 am 09:39 AM
How to use WebSocket and JavaScript to implement an online reservation system. In today's digital era, more and more businesses and services need to provide online reservation functions. It is crucial to implement an efficient and real-time online reservation system. This article will introduce how to use WebSocket and JavaScript to implement an online reservation system, and provide specific code examples. 1. What is WebSocket? WebSocket is a full-duplex method on a single TCP connection.
Go language indentation specifications and examples
Mar 22, 2024 pm 09:33 PM
Indentation specifications and examples of Go language Go language is a programming language developed by Google. It is known for its concise and clear syntax, in which indentation specifications play a crucial role in the readability and beauty of the code. effect. This article will introduce the indentation specifications of the Go language and explain in detail through specific code examples. Indentation specifications In the Go language, tabs are used for indentation instead of spaces. Each level of indentation is one tab, usually set to a width of 4 spaces. Such specifications unify the coding style and enable teams to work together to compile
JavaScript and WebSocket: Building an efficient real-time weather forecasting system
Dec 17, 2023 pm 05:13 PM
JavaScript and WebSocket: Building an efficient real-time weather forecast system Introduction: Today, the accuracy of weather forecasts is of great significance to daily life and decision-making. As technology develops, we can provide more accurate and reliable weather forecasts by obtaining weather data in real time. In this article, we will learn how to use JavaScript and WebSocket technology to build an efficient real-time weather forecast system. This article will demonstrate the implementation process through specific code examples. We
Simple JavaScript Tutorial: How to Get HTTP Status Code
Jan 05, 2024 pm 06:08 PM
JavaScript tutorial: How to get HTTP status code, specific code examples are required. Preface: In web development, data interaction with the server is often involved. When communicating with the server, we often need to obtain the returned HTTP status code to determine whether the operation is successful, and perform corresponding processing based on different status codes. This article will teach you how to use JavaScript to obtain HTTP status codes and provide some practical code examples. Using XMLHttpRequest
