webgl_modifier_edgesplit

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 { OBJLoader } from "three/examples/jsm/loaders/OBJLoader.js";
import { EdgeSplitModifier } from "three/examples/jsm/modifiers/EdgeSplitModifier.js";
import * as BufferGeometryUtils from "three/examples/jsm/utils/BufferGeometryUtils.js";

/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
  name: "webgl_modifier_edgesplit",
  useLoaders: [OBJLoader],
  info: [
    [
      {
        tag: "a",
        content: "three.js"
      },
      {
        tag: "text",
        content: "- Edge Split modifier"
      }
    ]
  ],
  init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
    let renderer, scene, camera;
    let modifier, mesh, baseGeometry;
    let map;
    const params = {
      smoothShading: true,
      edgeSplit: true,
      cutOffAngle: 20,
      showMap: false,
      tryKeepNormals: true
    };
    init();
    function init() {
      renderer = new THREE.WebGLRenderer({ antialias: true, canvas });
      renderer.setPixelRatio(window.devicePixelRatio);
      renderer.setSize(window.innerWidth, window.innerHeight);
      scene = new THREE.Scene();
      camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight);
      const controls = new OrbitControls(camera, renderer.domElement);
      controls.addEventListener("change", render);
      controls.enableDamping = true;
      controls.dampingFactor = 0.25;
      controls.rotateSpeed = 0.35;
      controls.minZoom = 1;
      camera.position.set(0, 0, 4);
      scene.add(new THREE.HemisphereLight(16777215, 4473924, 3));
      new OBJLoader().load("./models/obj/cerberus/Cerberus.obj", function(group) {
        const cerberus = group.children[0];
        const modelGeometry = cerberus.geometry;
        modifier = new EdgeSplitModifier();
        baseGeometry = BufferGeometryUtils.mergeVertices(modelGeometry);
        mesh = new THREE.Mesh(getGeometry(), new THREE.MeshStandardMaterial());
        mesh.material.flatShading = !params.smoothShading;
        mesh.rotateY(-Math.PI / 2);
        mesh.scale.set(3.5, 3.5, 3.5);
        mesh.translateZ(1.5);
        scene.add(mesh);
        if (map !== void 0 && params.showMap) {
          mesh.material.map = map;
          mesh.material.needsUpdate = true;
        }
        render();
      });
      window.addEventListener("resize", onWindowResize);
      new THREE.TextureLoader().load("./models/obj/cerberus/Cerberus_A.jpg", function(texture) {
        map = texture;
        map.colorSpace = THREE.SRGBColorSpace;
        if (mesh !== void 0 && params.showMap) {
          mesh.material.map = map;
          mesh.material.needsUpdate = true;
        }
      });
      const gui = new GUI({ title: "Edge split modifier parameters" });
      gui.add(params, "showMap").onFinishChange(updateMesh);
      gui.add(params, "smoothShading").onFinishChange(updateMesh);
      gui.add(params, "edgeSplit").onFinishChange(updateMesh);
      gui.add(params, "cutOffAngle").min(0).max(180).onFinishChange(updateMesh);
      gui.add(params, "tryKeepNormals").onFinishChange(updateMesh);
      needToDispose(renderer, scene, controls);
    }
    function onWindowResize() {
      renderer.setSize(window.innerWidth, window.innerHeight);
      camera.aspect = window.innerWidth / window.innerHeight;
      camera.updateProjectionMatrix();
      render();
    }
    function getGeometry() {
      let geometry;
      if (params.edgeSplit) {
        geometry = modifier.modify(
          baseGeometry,
          params.cutOffAngle * Math.PI / 180,
          params.tryKeepNormals
        );
      } else {
        geometry = baseGeometry;
      }
      return geometry;
    }
    function updateMesh() {
      if (mesh !== void 0) {
        mesh.geometry = getGeometry();
        let needsUpdate = mesh.material.flatShading === params.smoothShading;
        mesh.material.flatShading = params.smoothShading === false;
        if (map !== void 0) {
          needsUpdate = needsUpdate || mesh.material.map !== (params.showMap ? map : null);
          mesh.material.map = params.showMap ? map : null;
        }
        mesh.material.needsUpdate = needsUpdate;
        render();
      }
    }
    function render() {
      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_modifier_edgesplit ​

webgl_modifier_edgesplit