webgl_materials_subsurface_scattering

对应 three.js 示例地址。

仅需关注 init 函数的内容，其他部分都是示例小程序所使用的描述配置。

example.jstypings.d.ts

import * as THREE from "three";
import { OrbitControls } from "three/examples/jsm/controls/OrbitControls.js";
import { SubsurfaceScatteringShader } from "three/examples/jsm/shaders/SubsurfaceScatteringShader.js";
import { FBXLoader } from "three/examples/jsm/loaders/FBXLoader.js";

/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
  name: "webgl_materials_subsurface_scattering",
  useLoaders: [FBXLoader],
  info: [
    [
      {
        tag: "a",
        link: "https://threejs.org",
        content: "three.js"
      }
    ],
    [
      {
        tag: "text",
        content: "Fast subsurface scattering in Blinn-Phong shading demo"
      }
    ],
    [
      {
        tag: "text",
        content: "[Thanks for the art support from"
      },
      {
        tag: "a",
        link: "https://github.com/shaochun",
        content: "Shaochun Lin"
      },
      {
        tag: "text",
        content: "]"
      }
    ]
  ],
  init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
    let stats;
    let camera, scene, renderer;
    let model;
    init();
    function init() {
      camera = new THREE.PerspectiveCamera(40, window.innerWidth / window.innerHeight, 1, 5e3);
      camera.position.set(0, 300, 400 * 4);
      scene = new THREE.Scene();
      scene.add(new THREE.AmbientLight(12698049));
      const directionalLight = new THREE.DirectionalLight(16777215, 0.03);
      directionalLight.position.set(0, 0.5, 0.5).normalize();
      scene.add(directionalLight);
      const pointLight1 = new THREE.Mesh(
        new THREE.SphereGeometry(4, 8, 8),
        new THREE.MeshBasicMaterial({ color: 12698049 })
      );
      pointLight1.add(new THREE.PointLight(12698049, 4, 300, 0));
      scene.add(pointLight1);
      pointLight1.position.x = 0;
      pointLight1.position.y = -50;
      pointLight1.position.z = 350;
      const pointLight2 = new THREE.Mesh(
        new THREE.SphereGeometry(4, 8, 8),
        new THREE.MeshBasicMaterial({ color: 12697856 })
      );
      pointLight2.add(new THREE.PointLight(12697856, 0.75, 500, 0));
      scene.add(pointLight2);
      pointLight2.position.x = -100;
      pointLight2.position.y = 20;
      pointLight2.position.z = -260;
      renderer = new THREE.WebGLRenderer({ antialias: true, canvas });
      renderer.setPixelRatio(window.devicePixelRatio);
      renderer.setSize(window.innerWidth, window.innerHeight);
      renderer.setAnimationLoop(animate);
      stats = new Stats(renderer);
      const controls = new OrbitControls(camera, renderer.domElement);
      controls.minDistance = 500;
      controls.maxDistance = 3e3;
      window.addEventListener("resize", onWindowResize);
      initMaterial();
      needToDispose(renderer, scene, controls);
    }
    function initMaterial() {
      const loader = new THREE.TextureLoader();
      const imgTexture = loader.load("models/fbx/white.jpg");
      imgTexture.colorSpace = THREE.SRGBColorSpace;
      const thicknessTexture = loader.load("models/fbx/bunny_thickness.jpg");
      imgTexture.wrapS = imgTexture.wrapT = THREE.RepeatWrapping;
      const shader = SubsurfaceScatteringShader;
      const uniforms = THREE.UniformsUtils.clone(shader.uniforms);
      uniforms["map"].value = imgTexture;
      uniforms["diffuse"].value = new THREE.Vector3(1, 0.2, 0.2);
      uniforms["shininess"].value = 500;
      uniforms["thicknessMap"].value = thicknessTexture;
      uniforms["thicknessColor"].value = new THREE.Vector3(0.5, 0.3, 0);
      uniforms["thicknessDistortion"].value = 0.1;
      uniforms["thicknessAmbient"].value = 0.4;
      uniforms["thicknessAttenuation"].value = 0.8;
      uniforms["thicknessPower"].value = 2;
      uniforms["thicknessScale"].value = 16;
      const material = new THREE.ShaderMaterial({
        uniforms,
        vertexShader: shader.vertexShader,
        fragmentShader: shader.fragmentShader,
        lights: true
      });
      const loaderFBX = new FBXLoader();
      loaderFBX.load("models/fbx/stanford-bunny.fbx", function(object) {
        model = object.children[0];
        model.position.set(0, 0, 10);
        model.scale.setScalar(1);
        model.material = material;
        scene.add(model);
      });
      initGUI(uniforms);
    }
    function initGUI(uniforms) {
      const gui = new GUI({ title: "Thickness Control" });
      const ThicknessControls = function() {
        this.distortion = uniforms["thicknessDistortion"].value;
        this.ambient = uniforms["thicknessAmbient"].value;
        this.attenuation = uniforms["thicknessAttenuation"].value;
        this.power = uniforms["thicknessPower"].value;
        this.scale = uniforms["thicknessScale"].value;
      };
      const thicknessControls = new ThicknessControls();
      gui.add(thicknessControls, "distortion").min(0.01).max(1).step(0.01).onChange(function() {
        uniforms["thicknessDistortion"].value = thicknessControls.distortion;
        console.log("distortion");
      });
      gui.add(thicknessControls, "ambient").min(0.01).max(5).step(0.05).onChange(function() {
        uniforms["thicknessAmbient"].value = thicknessControls.ambient;
      });
      gui.add(thicknessControls, "attenuation").min(0.01).max(5).step(0.05).onChange(function() {
        uniforms["thicknessAttenuation"].value = thicknessControls.attenuation;
      });
      gui.add(thicknessControls, "power").min(0.01).max(16).step(0.1).onChange(function() {
        uniforms["thicknessPower"].value = thicknessControls.power;
      });
      gui.add(thicknessControls, "scale").min(0.01).max(50).step(0.1).onChange(function() {
        uniforms["thicknessScale"].value = thicknessControls.scale;
      });
    }
    function onWindowResize() {
      camera.aspect = window.innerWidth / window.innerHeight;
      camera.updateProjectionMatrix();
      renderer.setSize(window.innerWidth, window.innerHeight);
    }
    function animate() {
      render();
      stats.update();
    }
    const startTime = Date.now();
    function render() {
      if (model) model.rotation.y = (Date.now() - startTime) / 5e3;
      renderer.render(scene, camera);
    }
  }
};
export {
  exampleInfo as default
};

import { Loader, TypedArray } from 'three';
/**
 * 官网示例的多端使用封装把版本
 * */
export interface OfficialExampleInfo extends MiniProgramMeta {
  /*** 示例名称（保持和官网一致）*/
  name: string;
  /** main */
  init: (context: LoadContext) => void;
}

export interface LoadContext {
  //为了减少官方代码的改动，实际上等同于 canvas
  window: EventTarget & { innerWidth: number; innerHeight: number; devicePixelRatio: number };
  /** HTMLCanvasElement */
  canvas: any;
  /** https://www.npmjs.com/package/lil-gui */
  GUI: any;
  /**
   * https://www.npmjs.com/package/stats.js
   * 也可以使用其他受支持的版本
   * */
  Stats: any;
  /** 收集需要 dispose 的对象（官方示例没有处理这部分）*/
  needToDispose: (...objs: any[]) => void | ((fromFn: () => any[]) => void);

  /**基于 raq 的通用封装 */
  useFrame(animateFunc: (/** ms */ delta: number) => void): { cancel: () => void };

  /** 显示加载模态框 */
  requestLoading(text?: string): Promise<void>;

  /** 隐藏加载模态框*/
  cancelLoading(): void;

  /** 保存文件的通用封装*/
  saveFile(
    fileName: string,
    data: ArrayBuffer | TypedArray | DataView | string
  ): Promise<string | null>;

  /** 示例使用 DracoDecoder 时的资源路径 */
  DecoderPath: {
    GLTF: string;
    STANDARD: string;
  };

  /** 为资源路径拼上 CDN 前缀 */
  withCDNPrefix(path: string): string;

  /**
   * 在小程序中应使用 import { VideoTexture } from '@minisheep/three-platform-adapter/override/jsm/textures/VideoTexture.js';
   * 正常情况（web） 可直接使用 THREE.VideoTexture
   * */
  getVideoTexture(videoOptions: VideoOptions): Promise<[{ isVideoTexture: true }, video: any]>;

  /**
   * 在小程序中应使用 import { CameraTexture } from '@minisheep/three-platform-adapter/override/jsm/textures/CameraTexture.js';
   * 正常情况（web） 可参考示例 webgl_materials_video_webcam
   * */
  getCameraTexture(): { isVideoTexture: true };

  /** 用于动态修改 info 中的占位符*/
  bindInfoText(template: `$${string}$`, initValue?: string): { value: string };

  /** 分屏控件对应的事件回调 */
  onSlideStart(handle: () => void): void;
  /** 分屏控件对应的事件回调 */
  onSlideEnd(handle: () => void): void;
  /** 分屏控件对应的事件回调 */
  onSlideChange(handle: (offset: number, boxSize: number) => void): void;
}

export type VideoOptions = {
  src: string;
  /** 相当于 HTMLVideoElement 的 naturalWidth (小程序中获取不到)*/
  width: number;
  /** 相当于 HTMLVideoElement 的 naturalHeight (小程序中获取不到)*/
  height: number;
  loop?: boolean;
  autoplay?: boolean;
  muted?: boolean;
};

/** 示例小程序中使用的一些配置 */
export interface MiniProgramMeta {
  /** 用于统计加载相关信息 */
  useLoaders: Loader[];
  /** 通用 info */
  info: TagItem[][];
  /** 特殊 info */
  infoPanel?: {
    left?: [string, string][];
    right?: [string, string][];
  };
  /** 分屏控件配置 */
  needSlider?: {
    /** 方向 */
    direction?: 'horizontal' | 'vertical';
    /** 初始偏移 0-100 */
    initPosition?: number;
  };
  /** 操作摇杆控件 */
  needArrowControls?: boolean;
  /** 默认需要的画布类型 */
  canvasType?: '2d' | 'webgl' | 'webgl2';
  /** 为保持效果一致所需要的画布样式 */
  canvasStyle?: {
    bgColor?: string;
    width?: number | string;
    height?: number | string;
  };
  /** 部分示例需要在加载前进行一些提示 */
  initAfterConfirm?: {
    /**
     * 提示类型
     * @default 'default'
     * */
    type?: 'warning' | 'default';
    text: string[];
  };
}

export interface BaseTag<T extends string> {
  tag: T;
  content: string;
}

export interface ATag extends BaseTag<'a'> {
  link: string;
}

export type TextTag = BaseTag<'text'>;

export type TagItem = TextTag | ATag;

webgl_materials_subsurface_scattering ​

webgl_materials_subsurface_scattering