three打造一个游动的三维鱼和漫天灯笼效果代码-html代码-BFW代码库

代码语言：html

所属分类：三维

代码描述：three打造一个游动的三维鱼效果代码，新年年年有余

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.115.js"></script>
<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/BufferGeometryUtils.js"></script>
  <script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/OrbitControls.min.js"></script>
  <script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/STLLoader.js"></script>
    <script >
        var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(60, innerWidth / innerHeight, 0.1, 500);
camera.position.set(0, -25, 80);
var renderer = new THREE.WebGLRenderer({antialias: true});
renderer.setClearColor(0x181005);
renderer.setSize(innerWidth, innerHeight);
document.body.appendChild(renderer.domElement);

var controls = new THREE.OrbitControls(camera, renderer.domElement);
controls.maxDistance = 150;

// lanterns

let geoms = [];
let pts = [
  new THREE.Vector2(0, 1. - 0),
  new THREE.Vector2(0.25, 1. - 0),
  new THREE.Vector2(0.25, 1. - 0.125),
  new THREE.Vector2(0.45, 1. - 0.125),
  new THREE.Vector2(0.45, 1. - 0.95)
];
var geom = new THREE.LatheBufferGeometry(pts, 20);
geoms.push(geom);

var geomLight = new THREE.CylinderBufferGeometry(0.1, 0.1, 0.05, 20);
//geomLight.rotateX(Math.PI * 0.5);
geoms.push(geomLight);

var fullGeom = THREE.BufferGeometryUtils.mergeBufferGeometries(geoms);

var instGeom = new THREE.InstancedBufferGeometry().copy(fullGeom);

var num = 500;
let instPos = []; //3
let instSpeed = []; //1
let instLight = []; // 2 (initial intensity, frequency)
for (let i = 0; i < num; i++){
  instPos.push( Math.random() - 0.5, Math.random() - 0.5, Math.random() - 0.5 );
  instSpeed.push( Math.random() * 0.25 + 1);
  instLight.push( Math.PI + (Math.PI * Math.random()), Math.random() + 5);
}
instGeom.setAttribute("instPos", new THREE.InstancedBufferAttribute(new Float32Array(instPos), 3));
instGeom.setAttribute("instSpeed", new THREE.InstancedBufferAttribute(new Float32Array(instSpeed), 1));
instGeom.setAttribute("instLight", new THREE.InstancedBufferAttribute(new Float32Array(instPos), 2));

var mat = new THREE.ShaderMaterial({
  uniforms: {
    uTime: {value: 0},
    uLight: {value: new THREE.Color("red").multiplyScalar(1.5)},
    uColor: {value: new THREE.Color("maroon").multiplyScalar(1)},
    uFire: {value: new THREE.Color(1, 0.75, 0)}
  },
  vertexShader:`
    uniform float uTime;

    attribute vec3 instPos;
    attribute float instSpeed;
    attribute vec2 instLight;

    varying vec2 vInstLight;
    varying float vY;
    
    void main() {
      
      vInstLight = instLight;
      vY = position.y;

      vec3 pos = vec3(position) * 2.;
      vec3 iPos = instPos * 200.;
      
      iPos.xz += vec2(
        cos(instLight.x + instLight.y * uTime),
        sin(instLight.x + instLight.y * uTime * fract(sin(instLight.x)))
      );

      iPos.y = mod(iPos.y + 100. + (uTime * instSpeed), 200.) - 100.;
      pos += iPos;
      gl_Position = projectionMatrix * modelViewMatrix * vec4(pos,1.0);
    }
`,
  fragmentShader: `
    uniform float uTime;
    uniform vec3 uLight;
    uniform vec3 uColor;
    uniform vec3 uFire;

    varying vec2 vInstLight;
    varying float vY;
    
    void main() {
      
      vec3 col = vec3(0);
      float t = vInstLight.x + (vInstLight.y * uTime * 10.);
      float ts = sin(t * 3.14) * 0.5 + 0.5;
      float tc = cos(t * 2.7) * 0.5 + 0.5;
      float f = smoothstep(0.12, 0.12 + (ts + tc) * 0.25, vY);
      float li = (0.5 + smoothstep(0., 1., ts * ts + tc * tc) * 0.5);
      col = mix(uLight * li, uColor * (0.75 + li * 0.25), f);

      col = mix(col, uFire, step(vY, 0.05) * (0.75 + li * 0.25));

      gl_FragColor = vec4(col, 1);
    }
`,
  side: THREE.DoubleSide
});

var lantern = new THREE.Mesh(instGeom, mat);
scene.add(lantern);

// Koi

let oUs = [];

let loader = new THREE.STLLoader();
//https://clara.io/view/b47726c8-02cf-4eb5-b275-d9b2be591bad
loader.load("//repo.bfw.wiki/bfwrepo/model/fish.stl", objGeom => {
  console.log(objGeom);
  //objGeom.rotateX(-MathPI * 0.5);

  // path
  let baseVector = new THREE.Vec.........完整代码请登录后点击上方下载按钮下载查看