three+webgl实现三维红色雪花落下动画效果代码-html代码-BFW代码库

three+webgl实现三维红色雪花落下动画效果代码

代码语言：html

所属分类：三维

代码描述：three+webgl实现三维红色雪花落下动画效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >

<head>

  <meta charset="UTF-8">

  
  
<style>
body{
  overflow: hidden;
  margin: 0;
}
</style>



</head>

<body  >
  <script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/three.143.js"></script>
<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/OrbitControls.143.js"></script>
  
      <script>



let scene = new THREE.Scene();
scene.background = new THREE.Color(0x240024);
let camera = new THREE.PerspectiveCamera(45, innerWidth / innerHeight, 1, 1000);
camera.position.set(0, 0, 7);
let renderer = new THREE.WebGLRenderer();
renderer.setSize(innerWidth, innerHeight);
document.body.appendChild(renderer.domElement);
window.addEventListener("resize", event => {
  camera.aspect = innerWidth / innerHeight;
  camera.updateProjectionMatrix();
  renderer.setSize(innerWidth, innerHeight);
});

let controls = new THREE.OrbitControls(camera, renderer.domElement);
controls.enableDamping = true;
controls.enablePan = false;

let gu = {
  time: { value: 0 } };


let flakeData = [];
let g = new THREE.BufferGeometry().setFromPoints(new Array(1000).fill().map(_ => {
  flakeData.push(Math.random() < 0.5 ? -1 : 1, 0, 0, 0);
  return new THREE.Vector3().random().subScalar(0.5).multiplyScalar(10);
}));
g.setAttribute("flakeData", new THREE.Float32BufferAttribute(flakeData, 4));
let m = new THREE.PointsMaterial({
  color: 0xfbec5d,
  size: 0.75,
  onBeforeCompile: shader => {
    shader.uniforms.time = gu.time;
    shader.vertexShader = `
      uniform float time;
      attribute vec4 flakeData;
      varying vec4 vFlakeData;
      varying float vId;
      ${shader.vertexShader}
    `.replace(
    `#include <begin_vertex>`,
    `#include <begin_vertex>
      vId = float(gl_VertexID);
      vFlakeData = flakeData;
      
      vec3 p = vec3(position);
      
      transformed.y = 5. - mod(p.y + time - 5., 10.);
      
      
      `);

    //console.log(shader.vertexShader)
    shader.fragmentShader = `
      uniform float time;
      varying vec4 vFlakeData;
    .........完整代码请登录后点击上方下载按钮下载查看