webgl_lights_spotlights

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 TWEEN from "three/examples/jsm/libs/tween.module.js";
import { OrbitControls } from "three/examples/jsm/controls/OrbitControls.js";

/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
  name: "webgl_lights_spotlights",
  useLoaders: [],
  info: [
    [
      { tag: "a", link: "https://threejs.org", content: "three.js" },
      { tag: "text", content: "- SpotLights" }
    ],
    [
      { tag: "text", content: "by" },
      { tag: "a", link: "http://master-domain.com", content: "Master James" }
    ]
  ],
  init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
    const renderer = new THREE.WebGLRenderer({ antialias: true, canvas });
    renderer.setPixelRatio(window.devicePixelRatio);
    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.setAnimationLoop(animate);
    const camera = new THREE.PerspectiveCamera(
      35,
      window.innerWidth / window.innerHeight,
      0.1,
      100
    );
    const controls = new OrbitControls(camera, renderer.domElement);
    const scene = new THREE.Scene();
    const matFloor = new THREE.MeshPhongMaterial({ color: 8421504 });
    const matBox = new THREE.MeshPhongMaterial({ color: 11184810 });
    const geoFloor = new THREE.PlaneGeometry(100, 100);
    const geoBox = new THREE.BoxGeometry(0.3, 0.1, 0.2);
    const mshFloor = new THREE.Mesh(geoFloor, matFloor);
    mshFloor.rotation.x = -Math.PI * 0.5;
    const mshBox = new THREE.Mesh(geoBox, matBox);
    const ambient = new THREE.AmbientLight(4473924);
    const spotLight1 = createSpotlight(16744192);
    const spotLight2 = createSpotlight(65407);
    const spotLight3 = createSpotlight(8323327);
    let lightHelper1, lightHelper2, lightHelper3;
    function init() {
      renderer.shadowMap.enabled = true;
      renderer.shadowMap.type = THREE.PCFSoftShadowMap;
      camera.position.set(4.6, 2.2, -2.1);
      spotLight1.position.set(1.5, 4, 4.5);
      spotLight2.position.set(0, 4, 3.5);
      spotLight3.position.set(-1.5, 4, 4.5);
      lightHelper1 = new THREE.SpotLightHelper(spotLight1);
      lightHelper2 = new THREE.SpotLightHelper(spotLight2);
      lightHelper3 = new THREE.SpotLightHelper(spotLight3);
      mshFloor.receiveShadow = true;
      mshFloor.position.set(0, -0.05, 0);
      mshBox.castShadow = true;
      mshBox.receiveShadow = true;
      mshBox.position.set(0, 0.5, 0);
      scene.add(mshFloor);
      scene.add(mshBox);
      scene.add(ambient);
      scene.add(spotLight1, spotLight2, spotLight3);
      scene.add(lightHelper1, lightHelper2, lightHelper3);
      window.addEventListener("resize", onWindowResize);
      controls.target.set(0, 0.5, 0);
      controls.maxPolarAngle = Math.PI / 2;
      controls.minDistance = 1;
      controls.maxDistance = 10;
      controls.update();
      needToDispose(renderer, scene, controls);
    }
    function createSpotlight(color) {
      const newObj = new THREE.SpotLight(color, 10);
      newObj.castShadow = true;
      newObj.angle = 0.3;
      newObj.penumbra = 0.2;
      newObj.decay = 2;
      newObj.distance = 50;
      return newObj;
    }
    function onWindowResize() {
      camera.aspect = window.innerWidth / window.innerHeight;
      camera.updateProjectionMatrix();
      renderer.setSize(window.innerWidth, window.innerHeight);
    }
    function tween(light) {
      new TWEEN.Tween(light).to(
        {
          angle: Math.random() * 0.7 + 0.1,
          penumbra: Math.random() + 1
        },
        Math.random() * 3e3 + 2e3
      ).easing(TWEEN.Easing.Quadratic.Out).start();
      new TWEEN.Tween(light.position).to(
        {
          x: Math.random() * 3 - 1.5,
          y: Math.random() * 1 + 1.5,
          z: Math.random() * 3 - 1.5
        },
        Math.random() * 3e3 + 2e3
      ).easing(TWEEN.Easing.Quadratic.Out).start();
    }
    function updateTweens() {
      tween(spotLight1);
      tween(spotLight2);
      tween(spotLight3);
      setTimeout(updateTweens, 5e3);
    }
    function animate() {
      TWEEN.update();
      if (lightHelper1) lightHelper1.update();
      if (lightHelper2) lightHelper2.update();
      if (lightHelper3) lightHelper3.update();
      renderer.render(scene, camera);
    }
    init();
    updateTweens();
  }
};
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_lights_spotlights ​

webgl_lights_spotlights