ThreeJs开发环境安装与首个DEMO
安装开发环境
我这边使用的JetBrain的WebStorm，咨询过很多其他开发从业者，普遍使用vscode的比较多。但是考虑到vscode涉及到不少插件安装和IDE配置，作为傻瓜式入门，我这边采用WebStorm。
下载地址：
WebStorm: The JavaScript and TypeScript IDE, by JetBrains
完成下载安装后，直接打开新建project
ThreeJs下载与部署
下载ThreeJs的整个包。
下载地址：点击download即可下载
Three.js – JavaScript 3D Library
下载的压缩包直接放在项目的同级目录下解压即可使用。
在./three.js-master/examples/ 下面有大量现成的样例，直接右键运行即可测试ThreeJs库是否可用。
首个DEMO
直接将teapot的example复制出来，就能作为demo了。需要注意导入包的相对路径是不一样的，需要修改。
创建第一个demo项目，firstScene.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>第一个基础场景</title>
<script type="text/javascript" charset="utf-8"></script>
<style type="text/css">
body {
margin: 0;
overflow:hidden;
}
</style>
</head>
<body>
<script type="importmap">
{
"imports": {
"three": "./three.js-master/build/three.module.js",
"three/addons/": "./three.js-master/examples/jsm/"
}
}
</script>
<div id="info">
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - the Utah Teapot<br />
from <a href="https://www.udacity.com/course/interactive-3d-graphics--cs291" target="_blank" rel="noopener">Udacity Interactive 3D Graphics</a>
</div>
<script type="module">
import * as THREE from 'three';
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { TeapotGeometry } from 'three/addons/geometries/TeapotGeometry.js';
let camera, scene, renderer;
let cameraControls;
let effectController;
const teapotSize = 300;
let ambientLight, light;
let tess = - 1;// force initialization
let bBottom;
let bLid;
let bBody;
let bFitLid;
let bNonBlinn;
let shading;
let teapot, textureCube;
const materials = {};
init();
render();
function init() {
const container = document.createElement( 'div' );
document.body.appendChild( container );
const canvasWidth = window.innerWidth;
const canvasHeight = window.innerHeight;
// CAMERA
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 80000 );
camera.position.set( - 600, 550, 1300 );
// LIGHTS
ambientLight = new THREE.AmbientLight( 0x7c7c7c, 3.0 );
light = new THREE.DirectionalLight( 0xFFFFFF, 3.0 );
light.position.set( 0.32, 0.39, 0.7 );
// RENDERER
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( canvasWidth, canvasHeight );
container.appendChild( renderer.domElement );
// EVENTS
window.addEventListener( 'resize', onWindowResize );
// CONTROLS
cameraControls = new OrbitControls( camera, renderer.domElement );
cameraControls.addEventListener( 'change', render );
// TEXTURE MAP
const textureMap = new THREE.TextureLoader().load( 'textures/uv_grid_opengl.jpg' );
textureMap.wrapS = textureMap.wrapT = THREE.RepeatWrapping;
textureMap.anisotropy = 16;
textureMap.colorSpace = THREE.SRGBColorSpace;
// REFLECTION MAP
const path = 'textures/cube/pisa/';
const urls = [ 'px.png', 'nx.png', 'py.png', 'ny.png', 'pz.png', 'nz.png' ];
textureCube = new THREE.CubeTextureLoader().setPath( path ).load( urls );
materials[ 'wireframe' ] = new THREE.MeshBasicMaterial( { wireframe: true } );
materials[ 'flat' ] = new THREE.MeshPhongMaterial( { specular: 0x000000, flatShading: true, side: THREE.DoubleSide } );
materials[ 'smooth' ] = new THREE.MeshLambertMaterial( { side: THREE.DoubleSide } );
materials[ 'glossy' ] = new THREE.MeshPhongMaterial( { side: THREE.DoubleSide } );
materials[ 'textured' ] = new THREE.MeshPhongMaterial( { map: textureMap, side: THREE.DoubleSide } );
materials[ 'reflective' ] = new THREE.MeshPhongMaterial( { envMap: textureCube, side: THREE.DoubleSide } );
// scene itself
scene = new THREE.Scene();
scene.background = new THREE.Color( 0xAAAAAA );
scene.add( ambientLight );
scene.add( light );
// GUI
setupGui();
}
// EVENT HANDLERS
function onWindowResize() {
const canvasWidth = window.innerWidth;
const canvasHeight = window.innerHeight;
renderer.setSize( canvasWidth, canvasHeight );
camera.aspect = canvasWidth / canvasHeight;
camera.updateProjectionMatrix();
render();
}
function setupGui() {
effectController = {
newTess: 15,
bottom: true,
lid: true,
body: true,
fitLid: false,
nonblinn: false,
newShading: 'glossy'
};
const gui = new GUI();
gui.add( effectController, 'newTess', [ 2, 3, 4, 5, 6, 8, 10, 15, 20, 30, 40, 50 ] ).name( 'Tessellation Level' ).onChange( render );
gui.add( effectController, 'lid' ).name( 'display lid' ).onChange( render );
gui.add( effectController, 'body' ).name( 'display body' ).onChange( render );
gui.add( effectController, 'bottom' ).name( 'display bottom' ).onChange( render );
gui.add( effectController, 'fitLid' ).name( 'snug lid' ).onChange( render );
gui.add( effectController, 'nonblinn' ).name( 'original scale' ).onChange( render );
gui.add( effectController, 'newShading', [ 'wireframe', 'flat', 'smooth', 'glossy', 'textured', 'reflective' ] ).name( 'Shading' ).onChange( render );
}
//
function render() {
if ( effectController.newTess !== tess ||
effectController.bottom !== bBottom ||
effectController.lid !== bLid ||
effectController.body !== bBody ||
effectController.fitLid !== bFitLid ||
effectController.nonblinn !== bNonBlinn ||
effectController.newShading !== shading ) {
tess = effectController.newTess;
bBottom = effectController.bottom;
bLid = effectController.lid;
bBody = effectController.body;
bFitLid = effectController.fitLid;
bNonBlinn = effectController.nonblinn;
shading = effectController.newShading;
createNewTeapot();
}
// skybox is rendered separately, so that it is always behind the teapot.
if ( shading === 'reflective' ) {
scene.background = textureCube;
} else {
scene.background = null;
}
renderer.render( scene, camera );
}
// Whenever the teapot changes, the scene is rebuilt from scratch (not much to it).
function createNewTeapot() {
if ( teapot !== undefined ) {
teapot.geometry.dispose();
scene.remove( teapot );
}
const geometry = new TeapotGeometry( teapotSize,
tess,
effectController.bottom,
effectController.lid,
effectController.body,
effectController.fitLid,
! effectController.nonblinn );
teapot = new THREE.Mesh( geometry, materials[ shading ] );
scene.add( teapot );
}
</script>
</body>
</html>原文地址：https://blog.csdn.net/u010595191/article/details/145121020
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