效果:
中文网three.js docs
首先我们需要新建一个项目 vue/react都可 这里以vue为演示
npm i three
找到一个新的页面 在页面script的地方导入three
import * as THREE from "three"
或者自己逐个导入
import {
PerspectiveCamera,
Scene,
WebGLRenderer,
} from "three";
import * as THREE from "three"
简单介绍:
scence:场景-画布
camera:相机-PerspectiveCamera(投影摄像机:模拟人眼)-类似于模拟人的眼睛
render:渲染器-(画布+人=画) 这里就是一整幅画
将这一整幅画插入到body中
import {
PerspectiveCamera,
Scene,
WebGLRenderer,
} from "three";
import * as THREE from "three"
export default {
mounted() {
const scene = new Scene()
const camera = new PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 );
const renderer = new WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
const geometry = new THREE.BoxGeometry( 1, 1,1 );
const material = new THREE.MeshBasicMaterial( {
wireframe:true,
color: 0x42b983
} );
const cube = new THREE.Mesh( geometry, material );
scene.add( cube );
camera.position.z = 5;
},
}
简单介绍:
BoxGeometry:three提供的正方体 xyz
MeshBasicMaterial:基础材料 wireframe:true:将材料以线条的方式显示
Mesh:将形状+材料合并
创造一个立方体 设置好材料 形成一个完整的正方体 将这个完整的正方体添加到场景中
并且将相机拿远一点 就是camera.postion.z=5
如果不拿远 我们的视角就在相机内部 如下图
function animate() {
requestAnimationFrame( animate );
cube.rotation.x += 0.01;
cube.rotation.y += 0.01;
renderer.render( scene, camera );
}
animate();
requestAinmationFrame:动画针 重复调用animate函数
cube.rotation.y += 0.01:将正方体沿着x轴y轴旋转0.1
renderer.render( scene, camera ):重新渲染
按照浏览器的刷新频率去让正方体沿xy旋转 并且重新渲染
这样肉眼看起来就像立方体动了起来
import {
PerspectiveCamera,
Scene,
WebGLRenderer,
} from "three";
import * as THREE from "three"
export default {
mounted() {
const scene = new Scene()
const camera = new PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 );
const renderer = new WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
const geometry = new THREE.BoxGeometry( 1, 1,1 );
const material = new THREE.MeshBasicMaterial( {
wireframe:true,
color: 0x42b983,
} );
const cube = new THREE.Mesh( geometry, material );
scene.add( cube );
camera.position.z = 5;
function animate() {
requestAnimationFrame( animate );
cube.rotation.x += 1;
cube.rotation.y += 0.01;
renderer.render( scene, camera );
}
animate();
},
}