webgl_materials_envmaps_hdr

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.js

import * as THREE from "three";
import { OrbitControls } from "three/examples/jsm/controls/OrbitControls.js";
import { HDRCubeTextureLoader } from "three/examples/jsm/loaders/HDRCubeTextureLoader.js";
import { RGBMLoader } from "three/examples/jsm/loaders/RGBMLoader.js";
import { DebugEnvironment } from "three/examples/jsm/environments/DebugEnvironment.js";

/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
  name: "webgl_materials_envmaps_hdr",
  useLoaders: [HDRCubeTextureLoader, RGBMLoader],
  info: [
    [
      {
        tag: "a",
        link: "https://threejs.org",
        content: "three.js"
      },
      {
        tag: "text",
        content: "- High dynamic range (RGBE) Image-based Lighting (IBL)"
      }
    ],
    [
      {
        tag: "text",
        content: "using run-time generated pre-filtered roughness mipmaps (PMREM)"
      }
    ],
    [
      {
        tag: "text",
        content: "Created by Prashant Sharma and"
      },
      {
        tag: "a",
        link: "http://clara.io/",
        content: "Ben Houston"
      },
      {
        tag: "text",
        content: "."
      }
    ]
  ],
  init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
    const params = {
      envMap: "HDR",
      roughness: 0,
      metalness: 0,
      exposure: 1,
      debug: false
    };
    let stats;
    let camera, scene, renderer, controls;
    let torusMesh, planeMesh;
    let generatedCubeRenderTarget, ldrCubeRenderTarget, hdrCubeRenderTarget, rgbmCubeRenderTarget;
    let ldrCubeMap, hdrCubeMap, rgbmCubeMap;
    init();
    function init() {
      camera = new THREE.PerspectiveCamera(40, window.innerWidth / window.innerHeight, 1, 1e3);
      camera.position.set(0, 0, 120);
      scene = new THREE.Scene();
      scene.background = new THREE.Color(0);
      renderer = new THREE.WebGLRenderer({ canvas });
      renderer.toneMapping = THREE.ACESFilmicToneMapping;
      let geometry = new THREE.TorusKnotGeometry(18, 8, 150, 20);
      let material = new THREE.MeshStandardMaterial({
        color: 16777215,
        metalness: params.metalness,
        roughness: params.roughness
      });
      torusMesh = new THREE.Mesh(geometry, material);
      scene.add(torusMesh);
      geometry = new THREE.PlaneGeometry(200, 200);
      material = new THREE.MeshBasicMaterial();
      planeMesh = new THREE.Mesh(geometry, material);
      planeMesh.position.y = -50;
      planeMesh.rotation.x = -Math.PI * 0.5;
      scene.add(planeMesh);
      THREE.DefaultLoadingManager.onLoad = function() {
        pmremGenerator.dispose();
      };
      const hdrUrls = ["px.hdr", "nx.hdr", "py.hdr", "ny.hdr", "pz.hdr", "nz.hdr"];
      hdrCubeMap = new HDRCubeTextureLoader().setPath("./textures/cube/pisaHDR/").load(hdrUrls, function() {
        hdrCubeRenderTarget = pmremGenerator.fromCubemap(hdrCubeMap);
        hdrCubeMap.magFilter = THREE.LinearFilter;
        hdrCubeMap.needsUpdate = true;
      });
      const ldrUrls = ["px.png", "nx.png", "py.png", "ny.png", "pz.png", "nz.png"];
      ldrCubeMap = new THREE.CubeTextureLoader().setPath("./textures/cube/pisa/").load(ldrUrls, function() {
        ldrCubeRenderTarget = pmremGenerator.fromCubemap(ldrCubeMap);
      });
      const rgbmUrls = ["px.png", "nx.png", "py.png", "ny.png", "pz.png", "nz.png"];
      rgbmCubeMap = new RGBMLoader().setMaxRange(16).setPath("./textures/cube/pisaRGBM16/").loadCubemap(rgbmUrls, function() {
        rgbmCubeRenderTarget = pmremGenerator.fromCubemap(rgbmCubeMap);
      });
      const pmremGenerator = new THREE.PMREMGenerator(renderer);
      pmremGenerator.compileCubemapShader();
      const envScene = new DebugEnvironment();
      generatedCubeRenderTarget = pmremGenerator.fromScene(envScene);
      renderer.setPixelRatio(window.devicePixelRatio);
      renderer.setSize(window.innerWidth, window.innerHeight);
      renderer.setAnimationLoop(animate);
      stats = new Stats(renderer);
      controls = new OrbitControls(camera, renderer.domElement);
      controls.minDistance = 50;
      controls.maxDistance = 300;
      window.addEventListener("resize", onWindowResize);
      const gui = new GUI();
      gui.add(params, "envMap", ["Generated", "LDR", "HDR", "RGBM16"]);
      gui.add(params, "roughness", 0, 1, 0.01);
      gui.add(params, "metalness", 0, 1, 0.01);
      gui.add(params, "exposure", 0, 2, 0.01);
      gui.add(params, "debug");
      gui.open();
      needToDispose(renderer, scene, controls);
    }
    function onWindowResize() {
      const width = window.innerWidth;
      const height = window.innerHeight;
      camera.aspect = width / height;
      camera.updateProjectionMatrix();
      renderer.setSize(width, height);
    }
    function animate() {
      stats.begin();
      render();
      stats.end();
      stats.update();
    }
    function render() {
      torusMesh.material.roughness = params.roughness;
      torusMesh.material.metalness = params.metalness;
      let renderTarget, cubeMap;
      switch (params.envMap) {
        case "Generated":
          renderTarget = generatedCubeRenderTarget;
          cubeMap = generatedCubeRenderTarget.texture;
          break;
        case "LDR":
          renderTarget = ldrCubeRenderTarget;
          cubeMap = ldrCubeMap;
          break;
        case "HDR":
          renderTarget = hdrCubeRenderTarget;
          cubeMap = hdrCubeMap;
          break;
        case "RGBM16":
          renderTarget = rgbmCubeRenderTarget;
          cubeMap = rgbmCubeMap;
          break;
      }
      const newEnvMap = renderTarget ? renderTarget.texture : null;
      if (newEnvMap && newEnvMap !== torusMesh.material.envMap) {
        torusMesh.material.envMap = newEnvMap;
        torusMesh.material.needsUpdate = true;
        planeMesh.material.map = newEnvMap;
        planeMesh.material.needsUpdate = true;
      }
      torusMesh.rotation.y += 5e-3;
      planeMesh.visible = params.debug;
      scene.background = cubeMap;
      renderer.toneMappingExposure = params.exposure;
      renderer.render(scene, camera);
    }
  }
};
export {
  exampleInfo as default
};

typings.d.ts

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;