three.js-让物体动起来

three.js-让物体动起来

三维物体（Object3D）

这是Three.js中大部分对象的基类，提供了一系列的属性和方法来对三维空间中的物体进行操纵。

请注意，可以通过.add( object )方法来将对象进行组合，该方法将对象添加为子对象，但为此最好使用Group（来作为父对象）。

构造器

Object3D()

构造器中不带有参数。

1.设置物体移动-position

import * as THREE from "three";
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls';
// 位置
const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);

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

const geometry = new THREE.BoxGeometry(2, 2, 2);
const material = new THREE.MeshBasicMaterial( { color: 0x00ff00 } );
const cube = new THREE.Mesh( geometry, material );
// 移动物体
cube.position.set(1,0,0);
scene.add(cube);

camera.position.z = 5;
const controls = new OrbitControls( camera, renderer.domElement );
const axesHelper = new THREE.AxesHelper( 5 );

scene.add( axesHelper );
function render() {
    if (cube.position.x >= 5) {
        cube.position.x = 0;
    }
    cube.position.x += 0.01;
    renderer.render(scene, camera);
    requestAnimationFrame(render);
}
render();

2.设置物体缩放和旋转-scale-rotation

import * as THREE from "three";
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls';
// 旋转和缩放
const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);

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

const geometry = new THREE.BoxGeometry(2, 2, 2);
const material = new THREE.MeshBasicMaterial( { color: 0x00ff00 } );
const cube = new THREE.Mesh( geometry, material );
cube.position.set(1,0,0);
cube.scale.set(0.5,0.5,0.5);
cube.rotation.set(Math.PI / 4, 0, 0, 'XYZ')
scene.add(cube);

camera.position.z = 5;
const controls = new OrbitControls( camera, renderer.domElement );
const axesHelper = new THREE.AxesHelper( 5 );

scene.add( axesHelper );
function render() {
    cube.rotation.x += 0.1;
    if (cube.position.x >= 5) {
        cube.position.x = 0;
    }
    cube.position.x += 0.01;
    renderer.render(scene, camera);
    requestAnimationFrame(render);
}
render();

展示效果：自行试验