three.js 粒子移动

// 引入Three.js库
import * as THREE from 'three';

// 创建场景、相机和渲染器
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);

// 创建粒子系统
const particleCount = 1000;
const particles = new THREE.BufferGeometry();
const positions = new Float32Array(particleCount * 3);

for (let i = 0; i < particleCount * 3; i++) {
    positions[i] = (Math.random() - 0.5) * 10;
}

particles.setAttribute('position', new THREE.BufferAttribute(positions, 3));

const particleMaterial = new THREE.PointsMaterial({ color: 0xffffff, size: 0.1 });
const particleSystem = new THREE.Points(particles, particleMaterial);
scene.add(particleSystem);

camera.position.z = 5;

// 动画循环
function animate() {
    requestAnimationFrame(animate);

    // 更新粒子位置
    const positions = particleSystem.geometry.attributes.position.array;
    for (let i = 0; i < particleCount * 3; i += 3) {
        positions[i] += (Math.random() - 0.5) * 0.01; // x方向移动
        positions[i + 1] += (Math.random() - 0.5) * 0.01; // y方向移动
        positions[i + 2] += (Math.random() - 0.5) * 0.01; // z方向移动
    }
    particleSystem.geometry.attributes.position.needsUpdate = true;

    renderer.render(scene, camera);
}

animate();