webgl_loader_svg

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

/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
  name: "webgl_loader_svg",
  useLoaders: [SVGLoader],
  info: [
    [
      {
        tag: "a",
        link: "https://threejs.org",
        content: "three.js"
      },
      {
        tag: "text",
        content: "- SVGLoader"
      }
    ]
  ],
  init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
    let renderer, scene, camera, gui, guiData, loader;
    init();
    function init() {
      camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 1e3);
      camera.position.set(0, 0, 200);
      renderer = new THREE.WebGLRenderer({ antialias: true, canvas });
      renderer.setPixelRatio(window.devicePixelRatio);
      renderer.setSize(window.innerWidth, window.innerHeight);
      const controls = new OrbitControls(camera, renderer.domElement);
      controls.addEventListener("change", render);
      controls.screenSpacePanning = true;
      window.addEventListener("resize", onWindowResize);
      guiData = {
        currentURL: "models/svg/tiger.svg",
        drawFillShapes: true,
        drawStrokes: true,
        fillShapesWireframe: false,
        strokesWireframe: false
      };
      loader = new SVGLoader();
      loadSVG(guiData.currentURL);
      createGUI();
      needToDispose(renderer, scene, controls, loader);
    }
    function createGUI() {
      if (gui) gui.destroy();
      gui = new GUI();
      gui.add(guiData, "currentURL", {
        Tiger: "models/svg/tiger.svg",
        "Joins and caps": "models/svg/lineJoinsAndCaps.svg",
        Hexagon: "models/svg/hexagon.svg",
        Energy: "models/svg/energy.svg",
        "Test 1": "models/svg/tests/1.svg",
        "Test 2": "models/svg/tests/2.svg",
        "Test 3": "models/svg/tests/3.svg",
        "Test 4": "models/svg/tests/4.svg",
        "Test 5": "models/svg/tests/5.svg",
        "Test 6": "models/svg/tests/6.svg",
        "Test 7": "models/svg/tests/7.svg",
        "Test 8": "models/svg/tests/8.svg",
        "Test 9": "models/svg/tests/9.svg",
        Units: "models/svg/tests/units.svg",
        Ordering: "models/svg/tests/ordering.svg",
        Defs: "models/svg/tests/testDefs/Svg-defs.svg",
        Defs2: "models/svg/tests/testDefs/Svg-defs2.svg",
        Defs3: "models/svg/tests/testDefs/Wave-defs.svg",
        Defs4: "models/svg/tests/testDefs/defs4.svg",
        Defs5: "models/svg/tests/testDefs/defs5.svg",
        "Style CSS inside defs": "models/svg/style-css-inside-defs.svg",
        "Multiple CSS classes": "models/svg/multiple-css-classes.svg",
        "Zero Radius": "models/svg/zero-radius.svg",
        "Styles in svg tag": "models/svg/tests/styles.svg",
        "Round join": "models/svg/tests/roundJoinPrecisionIssue.svg",
        "Ellipse Transformations": "models/svg/tests/ellipseTransform.svg",
        singlePointTest: "models/svg/singlePointTest.svg",
        singlePointTest2: "models/svg/singlePointTest2.svg",
        singlePointTest3: "models/svg/singlePointTest3.svg",
        emptyPath: "models/svg/emptyPath.svg"
      }).name("SVG File").onChange(update);
      gui.add(guiData, "drawStrokes").name("Draw strokes").onChange(update);
      gui.add(guiData, "drawFillShapes").name("Draw fill shapes").onChange(update);
      gui.add(guiData, "strokesWireframe").name("Wireframe strokes").onChange(update);
      gui.add(guiData, "fillShapesWireframe").name("Wireframe fill shapes").onChange(update);
      function update() {
        loadSVG(guiData.currentURL);
      }
    }
    function loadSVG(url) {
      scene = new THREE.Scene();
      scene.background = new THREE.Color(11579568);
      const helper = new THREE.GridHelper(160, 10, 9276813, 12698049);
      helper.rotation.x = Math.PI / 2;
      scene.add(helper);
      loader.load(url, function(data) {
        const group = new THREE.Group();
        group.scale.multiplyScalar(0.25);
        group.position.x = -70;
        group.position.y = 70;
        group.scale.y *= -1;
        let renderOrder = 0;
        for (const path of data.paths) {
          const fillColor = path.userData.style.fill;
          if (guiData.drawFillShapes && fillColor !== void 0 && fillColor !== "none") {
            const material = new THREE.MeshBasicMaterial({
              color: new THREE.Color().setStyle(fillColor),
              opacity: path.userData.style.fillOpacity,
              transparent: true,
              side: THREE.DoubleSide,
              depthWrite: false,
              wireframe: guiData.fillShapesWireframe
            });
            const shapes = SVGLoader.createShapes(path);
            for (const shape of shapes) {
              const geometry = new THREE.ShapeGeometry(shape);
              const mesh = new THREE.Mesh(geometry, material);
              mesh.renderOrder = renderOrder++;
              group.add(mesh);
            }
          }
          const strokeColor = path.userData.style.stroke;
          if (guiData.drawStrokes && strokeColor !== void 0 && strokeColor !== "none") {
            const material = new THREE.MeshBasicMaterial({
              color: new THREE.Color().setStyle(strokeColor),
              opacity: path.userData.style.strokeOpacity,
              transparent: true,
              side: THREE.DoubleSide,
              depthWrite: false,
              wireframe: guiData.strokesWireframe
            });
            for (const subPath of path.subPaths) {
              const geometry = SVGLoader.pointsToStroke(subPath.getPoints(), path.userData.style);
              if (geometry) {
                const mesh = new THREE.Mesh(geometry, material);
                mesh.renderOrder = renderOrder++;
                group.add(mesh);
              }
            }
          }
        }
        scene.add(group);
        render();
      });
    }
    function onWindowResize() {
      camera.aspect = window.innerWidth / window.innerHeight;
      camera.updateProjectionMatrix();
      renderer.setSize(window.innerWidth, window.innerHeight);
      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_loader_svg ​

webgl_loader_svg