webgl_instancing_morph

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

/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
  name: "webgl_instancing_morph",
  useLoaders: [GLTFLoader],
  info: [],
  init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
    let camera, scene, renderer, stats, mesh, mixer, dummy;
    const offset = 5e3;
    const timeOffsets = new Float32Array(1024);
    for (let i = 0; i < 1024; i++) {
      timeOffsets[i] = Math.random() * 3;
    }
    const clock = new THREE.Clock(true);
    init();
    function init() {
      camera = new THREE.PerspectiveCamera(60, window.innerWidth / window.innerHeight, 100, 1e4);
      scene = new THREE.Scene();
      scene.background = new THREE.Color(10083839);
      scene.fog = new THREE.Fog(10083839, 5e3, 1e4);
      const light = new THREE.DirectionalLight(16777215, 1);
      light.position.set(200, 1e3, 50);
      light.castShadow = true;
      light.shadow.camera.left = -5e3;
      light.shadow.camera.right = 5e3;
      light.shadow.camera.top = 5e3;
      light.shadow.camera.bottom = -5e3;
      light.shadow.camera.far = 2e3;
      light.shadow.bias = -0.01;
      light.shadow.camera.updateProjectionMatrix();
      scene.add(light);
      const hemi = new THREE.HemisphereLight(10083839, 6723891, 1 / 3);
      scene.add(hemi);
      const ground = new THREE.Mesh(
        new THREE.PlaneGeometry(1e6, 1e6),
        new THREE.MeshStandardMaterial({ color: 6723891, depthWrite: true })
      );
      ground.rotation.x = -Math.PI / 2;
      ground.receiveShadow = true;
      scene.add(ground);
      const loader = new GLTFLoader();
      loader.load("models/gltf/Horse.glb", function(glb) {
        dummy = glb.scene.children[0];
        mesh = new THREE.InstancedMesh(dummy.geometry, dummy.material, 1024);
        mesh.castShadow = true;
        for (let x = 0, i = 0; x < 32; x++) {
          for (let y = 0; y < 32; y++) {
            dummy.position.set(offset - 300 * x + 200 * Math.random(), 0, offset - 300 * y);
            dummy.updateMatrix();
            mesh.setMatrixAt(i, dummy.matrix);
            mesh.setColorAt(i, new THREE.Color(`hsl(${Math.random() * 360}, 50%, 66%)`));
            i++;
          }
        }
        scene.add(mesh);
        mixer = new THREE.AnimationMixer(glb.scene);
        const action = mixer.clipAction(glb.animations[0]);
        action.play();
      });
      renderer = new THREE.WebGLRenderer({ antialias: true, canvas });
      renderer.setPixelRatio(window.devicePixelRatio);
      renderer.setSize(window.innerWidth, window.innerHeight);
      renderer.setAnimationLoop(animate);
      renderer.shadowMap.enabled = true;
      renderer.shadowMap.type = THREE.VSMShadowMap;
      stats = new Stats(renderer);
      window.addEventListener("resize", onWindowResize);
      needToDispose(renderer, scene);
    }
    function onWindowResize() {
      camera.aspect = window.innerWidth / window.innerHeight;
      camera.updateProjectionMatrix();
      renderer.setSize(window.innerWidth, window.innerHeight);
    }
    function animate() {
      render();
      stats.update();
    }
    function render() {
      const time = clock.getElapsedTime();
      const r = 3e3;
      camera.position.set(
        Math.sin(time / 10) * r,
        1500 + 1e3 * Math.cos(time / 5),
        Math.cos(time / 10) * r
      );
      camera.lookAt(0, 0, 0);
      if (mesh) {
        for (let i = 0; i < 1024; i++) {
          mixer.setTime(time + timeOffsets[i]);
          mesh.setMorphAt(i, dummy);
        }
        mesh.morphTexture.needsUpdate = true;
      }
      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 {
  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: Record<string, 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_instancing_morph ​

webgl_instancing_morph