webgl_pmrem_test

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 { RGBELoader } from "three/examples/jsm/loaders/RGBELoader.js";

/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
  name: "webgl_pmrem_test",
  useLoaders: [RGBELoader],
  info: [
    [
      {
        tag: "a",
        link: "https://threejs.org",
        content: "three.js"
      },
      {
        tag: "text",
        content: "- PMREM test by"
      },
      {
        tag: "a",
        link: "https://github.com/elalish",
        content: "Emmett Lalish"
      }
    ],
    [
      {
        tag: "text",
        content: "1: white metal. 2: white dielectric. 3: black dielectric."
      }
    ],
    [
      {
        tag: "text",
        content: "PMREM on: HDR with a single bright pixel. PMREM off: DirectionalLight."
      }
    ],
    [
      {
        tag: "text",
        content: "The difference between these renders indicates the error in the PMREM approximations."
      }
    ]
  ],
  init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
    let scene, camera, controls, renderer;
    function init() {
      const width = window.innerWidth;
      const height = window.innerHeight;
      const aspect = width / height;
      renderer = new THREE.WebGLRenderer({ antialias: true, canvas });
      renderer.setPixelRatio(window.devicePixelRatio);
      renderer.setSize(width, height);
      renderer.toneMapping = THREE.ACESFilmicToneMapping;
      renderer.toneMappingExposure = 1;
      window.addEventListener("resize", onWindowResize);
      scene = new THREE.Scene();
      camera = new THREE.PerspectiveCamera(40, aspect, 1, 30);
      updateCamera();
      camera.position.set(0, 0, 16);
      controls = new OrbitControls(camera, renderer.domElement);
      controls.addEventListener("change", render);
      controls.minDistance = 4;
      controls.maxDistance = 20;
      const directionalLight = new THREE.DirectionalLight(16777215, 0);
      const x = 597;
      const y = 213;
      const theta = (x + 0.5) * Math.PI / 512;
      const phi = (y + 0.5) * Math.PI / 512;
      directionalLight.position.setFromSphericalCoords(100, -phi, Math.PI / 2 - theta);
      scene.add(directionalLight);
      const gui = new GUI();
      gui.add({ enabled: true }, "enabled").name("PMREM").onChange((value) => {
        directionalLight.intensity = value ? 0 : 1;
        scene.traverse(function(child) {
          if (child.isMesh) {
            child.material.envMapIntensity = 1 - directionalLight.intensity;
          }
        });
        render();
      });
      needToDispose(renderer, scene, controls);
    }
    function createObjects() {
      let radianceMap = null;
      new RGBELoader().setPath("textures/equirectangular/").load("spot1Lux.hdr", function(texture) {
        radianceMap = pmremGenerator.fromEquirectangular(texture).texture;
        pmremGenerator.dispose();
        scene.background = radianceMap;
        const geometry = new THREE.SphereGeometry(0.4, 32, 32);
        for (let x = 0; x <= 10; x++) {
          for (let y = 0; y <= 2; y++) {
            const material = new THREE.MeshPhysicalMaterial({
              roughness: x / 10,
              metalness: y < 1 ? 1 : 0,
              color: y < 2 ? 16777215 : 0,
              envMap: radianceMap,
              envMapIntensity: 1
            });
            const mesh = new THREE.Mesh(geometry, material);
            mesh.position.x = x - 5;
            mesh.position.y = 1 - y;
            scene.add(mesh);
          }
        }
        render();
      });
      const pmremGenerator = new THREE.PMREMGenerator(renderer);
      pmremGenerator.compileEquirectangularShader();
      needToDispose(pmremGenerator);
    }
    function onWindowResize() {
      const width = window.innerWidth;
      const height = window.innerHeight;
      camera.aspect = width / height;
      updateCamera();
      renderer.setSize(width, height);
      render();
    }
    function updateCamera() {
      const horizontalFoV = 40;
      const verticalFoV = 2 * Math.atan(Math.tan(horizontalFoV / 2 * Math.PI / 180) / camera.aspect) * 180 / Math.PI;
      camera.fov = verticalFoV;
      camera.updateProjectionMatrix();
    }
    function render() {
      renderer.render(scene, camera);
    }
    Promise.resolve().then(init).then(createObjects).then(render);
  }
};
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_pmrem_test ​

webgl_pmrem_test