misc_controls_arcball

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 { ArcballControls } from "three/examples/jsm/controls/ArcballControls.js";
import { OBJLoader } from "three/examples/jsm/loaders/OBJLoader.js";
import { RGBELoader } from "three/examples/jsm/loaders/RGBELoader.js";

/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
  name: "misc_controls_arcball",
  useLoaders: [OBJLoader, RGBELoader],
  info: [
    [
      { tag: "a", link: "https://threejs.org", content: "three.js" },
      { tag: "text", content: "- arcball controls" }
    ],
    [
      {
        tag: "a",
        link: "http://www.polycount.com/forum/showthread.php?t=130641",
        content: "Cerberus(FFVII Gun) model"
      },
      { tag: "text", content: "by Andrew Maximov." }
    ]
  ],
  init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
    const cameras = ["Orthographic", "Perspective"];
    const cameraType = { type: "Perspective" };
    const perspectiveDistance = 2.5;
    const orthographicDistance = 120;
    let camera, controls, scene, renderer, gui;
    let folderOptions, folderAnimations;
    const arcballGui = {
      gizmoVisible: true,
      setArcballControls: function() {
        controls = new ArcballControls(camera, renderer.domElement, scene);
        controls.addEventListener("change", render);
        this.gizmoVisible = true;
        this.populateGui();
      },
      populateGui: function() {
        folderOptions.add(controls, "enabled").name("Enable controls");
        folderOptions.add(controls, "enableGrid").name("Enable Grid");
        folderOptions.add(controls, "enableRotate").name("Enable rotate");
        folderOptions.add(controls, "enablePan").name("Enable pan");
        folderOptions.add(controls, "enableZoom").name("Enable zoom");
        folderOptions.add(controls, "cursorZoom").name("Cursor zoom");
        folderOptions.add(controls, "adjustNearFar").name("adjust near/far");
        folderOptions.add(controls, "scaleFactor", 1.1, 10, 0.1).name("Scale factor");
        folderOptions.add(controls, "minDistance", 0, 50, 0.5).name("Min distance");
        folderOptions.add(controls, "maxDistance", 0, 50, 0.5).name("Max distance");
        folderOptions.add(controls, "minZoom", 0, 50, 0.5).name("Min zoom");
        folderOptions.add(controls, "maxZoom", 0, 50, 0.5).name("Max zoom");
        folderOptions.add(arcballGui, "gizmoVisible").name("Show gizmos").onChange(function() {
          controls.setGizmosVisible(arcballGui.gizmoVisible);
        });
        folderOptions.add(controls, "copyState").name("Copy state(ctrl+c)");
        folderOptions.add(controls, "pasteState").name("Paste state(ctrl+v)");
        folderOptions.add(controls, "reset").name("Reset");
        folderAnimations.add(controls, "enableAnimations").name("Enable anim.");
        folderAnimations.add(controls, "dampingFactor", 0, 100, 1).name("Damping");
        folderAnimations.add(controls, "wMax", 0, 100, 1).name("Angular spd");
      }
    };
    init();
    function init() {
      renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true, canvas });
      renderer.setPixelRatio(window.devicePixelRatio);
      renderer.setSize(window.innerWidth, window.innerHeight);
      renderer.toneMapping = THREE.ReinhardToneMapping;
      renderer.toneMappingExposure = 3;
      renderer.domElement.style.background = "linear-gradient( 180deg, rgba( 0,0,0,1 ) 0%, rgba( 128,128,255,1 ) 100% )";
      scene = new THREE.Scene();
      camera = makePerspectiveCamera();
      camera.position.set(0, 0, perspectiveDistance);
      const material = new THREE.MeshStandardMaterial();
      new OBJLoader().setPath("models/obj/cerberus/").load("Cerberus.obj", function(group) {
        const textureLoader = new THREE.TextureLoader().setPath("models/obj/cerberus/");
        material.roughness = 1;
        material.metalness = 1;
        const diffuseMap = textureLoader.load("Cerberus_A.jpg", render);
        diffuseMap.colorSpace = THREE.SRGBColorSpace;
        material.map = diffuseMap;
        material.metalnessMap = material.roughnessMap = textureLoader.load(
          "Cerberus_RM.jpg",
          render
        );
        material.normalMap = textureLoader.load("Cerberus_N.jpg", render);
        material.map.wrapS = THREE.RepeatWrapping;
        material.roughnessMap.wrapS = THREE.RepeatWrapping;
        material.metalnessMap.wrapS = THREE.RepeatWrapping;
        material.normalMap.wrapS = THREE.RepeatWrapping;
        group.traverse(function(child) {
          if (child.isMesh) {
            child.material = material;
          }
        });
        group.rotation.y = Math.PI / 2;
        group.position.x += 0.25;
        scene.add(group);
        render();
        const rgbeLoader = new RGBELoader().setPath("textures/equirectangular/").load("venice_sunset_1k.hdr", function(hdrEquirect) {
          hdrEquirect.mapping = THREE.EquirectangularReflectionMapping;
          scene.environment = hdrEquirect;
          render();
        });
        window.addEventListener("resize", onWindowResize);
        gui = new GUI();
        gui.add(cameraType, "type", cameras).name("Choose Camera").onChange(function() {
          setCamera(cameraType.type);
        });
        folderOptions = gui.addFolder("Arcball parameters");
        folderAnimations = folderOptions.addFolder("Animations");
        arcballGui.setArcballControls();
        render();
        needToDispose(renderer, scene, controls, rgbeLoader);
      });
    }
    function makeOrthographicCamera() {
      const halfFovV = THREE.MathUtils.DEG2RAD * 45 * 0.5;
      const halfFovH = Math.atan(window.innerWidth / window.innerHeight * Math.tan(halfFovV));
      const halfW = perspectiveDistance * Math.tan(halfFovH);
      const halfH = perspectiveDistance * Math.tan(halfFovV);
      const near = 0.01;
      const far = 2e3;
      const newCamera = new THREE.OrthographicCamera(-halfW, halfW, halfH, -halfH, near, far);
      return newCamera;
    }
    function makePerspectiveCamera() {
      const fov = 45;
      const aspect = window.innerWidth / window.innerHeight;
      const near = 0.01;
      const far = 2e3;
      const newCamera = new THREE.PerspectiveCamera(fov, aspect, near, far);
      return newCamera;
    }
    function onWindowResize() {
      if (camera.type == "OrthographicCamera") {
        const halfFovV = THREE.MathUtils.DEG2RAD * 45 * 0.5;
        const halfFovH = Math.atan(window.innerWidth / window.innerHeight * Math.tan(halfFovV));
        const halfW = perspectiveDistance * Math.tan(halfFovH);
        const halfH = perspectiveDistance * Math.tan(halfFovV);
        camera.left = -halfW;
        camera.right = halfW;
        camera.top = halfH;
        camera.bottom = -halfH;
      } else if (camera.type == "PerspectiveCamera") {
        camera.aspect = window.innerWidth / window.innerHeight;
      }
      camera.updateProjectionMatrix();
      renderer.setSize(window.innerWidth, window.innerHeight);
      render();
    }
    function render() {
      renderer.render(scene, camera);
    }
    function setCamera(type) {
      if (type == "Orthographic") {
        camera = makeOrthographicCamera();
        camera.position.set(0, 0, orthographicDistance);
      } else if (type == "Perspective") {
        camera = makePerspectiveCamera();
        camera.position.set(0, 0, perspectiveDistance);
      }
      controls.setCamera(camera);
      render();
    }
  }
};
export {
  exampleInfo as default
};

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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;

misc_controls_arcball ​

misc_controls_arcball