three实现三维空间物体漂浮面彩色动画效果代码-html代码-BFW代码库

three实现三维空间物体漂浮面彩色动画效果代码

代码语言：html

所属分类：三维

代码描述：three实现三维空间物体漂浮面彩色动画效果代码

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 translate="no">
  <script type="importmap">
  {
    "imports": {
      "three": "//repo.bfw.wiki/bfwrepo/js/module/three/build/166/three.module.js",
      "three/addons/": "//repo.bfw.wiki/bfwrepo/js/module/three/examples/166/jsm/"
    }
  }
</script>
  
      <script type="module">
import * as THREE from "three";
import { OrbitControls } from "three/addons/controls/OrbitControls.js";

console.clear();

class ColorizedInstances extends THREE.InstancedMesh {
  constructor(geometry, material, amount) {
    super(geometry, material, amount);
    this.dummy = new THREE.Object3D();
    this.initInstances();

    this.faces = geometry.attributes.position.count / 3;
    let size = this.faces * amount * 4;
    this.faceColorData = new THREE.DataTexture(new Uint8Array(size).fill(255), this.faces, amount);
    this.faceColorData.needsUpdate = true;
    //console.log(this.faceColorData);

    this.material.onBeforeCompile = shader => {
      shader.uniforms.faceColorData = { value: this.faceColorData };
      shader.vertexShader = `
        varying float vIId;
        varying float vFId;
        ${shader.vertexShader}
      `.replace(
      `#include <uv_vertex>`,
      `
        vIId = float(gl_InstanceID);
        vFId = floor(float(gl_VertexID) / 3. + 0.1);
        #include <uv_vertex>`);

      //console.log(shader.vertexShader);
      shader.fragmentShader = `
        uniform sampler2D faceColorData;
        varying float vIId;
        varying float vFId;
        ${shader.fragmentShader}
      `.replace(
      `vec4 diffuseColor = vec4( diffuse, opacity );`,
      `
        int u = int(floor(vFId + 0.1));
        int v = int(floor(vIId + 0.1));
        
        vec3 fColor = texelFetch(faceColorData, ivec2(u, v), 0).rgb;
        
        vec4 diffuseColor = vec4( diffuse * fColor, opacity );`);

      //console.l.........完整代码请登录后点击上方下载按钮下载查看