How to do 3D in uniapp

With the continuous development of AR/VR technology, more and more developers are beginning to try to achieve 3D effects on the mobile terminal. At the same time, uniapp has also become a cross-platform development framework that has attracted much attention. So, how to achieve 3D effects in uniapp? This article will introduce you to the implementation of 3D in uniapp.

1. Use the Three.js class library

Three.js is a popular JavaScript 3D class library that can help developers easily achieve 3D effects in the browser. Using Three.js in uniapp is also very simple, just introduce the corresponding library file into the project.

1. Download the Three.js library file

Go to the official website (https://threejs.org/) to download the corresponding version of the Three.js library file.

2. Introduce the Three.js library file into the uniapp project

Copy the downloaded library file to the static directory of the uniapp project (you need to create the static directory yourself), Then add the following code in the index.html file:

<script src="/static/js/three.min.js"></script>

So that you can use the Three.js class library in uniapp.

3. Use Three.js to create 3D scenes

Now you can start using Three.js to create 3D scenes. The following code snippet shows how to create a simple 3D scene using Three.js:

var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(75, window.innerWidth/window.innerHeight, 0.1, 1000);

var renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

var geometry = new THREE.BoxGeometry(1, 1, 1);
var material = new THREE.MeshBasicMaterial({color: 0x00ff00});
var cube = new THREE.Mesh(geometry, material);
scene.add(cube);

camera.position.z = 5;

function animate() {
    requestAnimationFrame(animate);
    cube.rotation.x += 0.01;
    cube.rotation.y += 0.01;
    renderer.render(scene, camera);
}
animate();

The above code creates a green cube that is constantly rotating in the animation.

2. Use the Threejs-miniprogram class library

Threejs-miniprogram is a Three.js package library developed for the uniapp applet. It provides some features for the applet and can Use it directly in the mini program.

1. Install Threejs-miniprogram

Open the uniapp project root directory and execute the following command:

npm install threejs-miniprogram

2. Use Threejs-miniprogram

After introducing the Threejs-miniprogram library, just reference it in the page that needs to use 3D effects, as shown below:

import * as THREE from 'threejs-miniprogram/dist/three.esm.js';

Then you can create a 3D scene in the same way as using Three.js, for example :

var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(75, window.innerWidth/window.innerHeight, 0.1, 1000);

var renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

var geometry = new THREE.BoxGeometry(1, 1, 1);
var material = new THREE.MeshBasicMaterial({color: 0x00ff00});
var cube = new THREE.Mesh(geometry, material);
scene.add(cube);

camera.position.z = 5;

function animate() {
    requestAnimationFrame(animate);
    cube.rotation.x += 0.01;
    cube.rotation.y += 0.01;
    renderer.render(scene, camera);
}
animate();

Summary

Through the above methods, we can easily achieve 3D effects in uniapp, and the Three.js class library and Threejs-miniprogram class library can help us build 3D faster Scenes. I hope this article can help developers who want to carry out 3D development in uniapp.

The above is the detailed content of How to do 3D in uniapp. For more information, please follow other related articles on the PHP Chinese website!