webgl_geometry_extrude_splines

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 * as Curves from "three/examples/jsm/curves/CurveExtras.js";
import { OrbitControls } from "three/examples/jsm/controls/OrbitControls.js";

/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
  name: "webgl_geometry_extrude_splines",
  useLoaders: [],
  info: [
    [
      {
        tag: "a",
        link: "https://threejs.org",
        content: "three.js"
      },
      {
        tag: "text",
        content: "- spline extrusion examples"
      }
    ]
  ],
  init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
    let stats;
    let camera, scene, renderer, splineCamera, cameraHelper, cameraEye;
    const direction = new THREE.Vector3();
    const binormal = new THREE.Vector3();
    const normal = new THREE.Vector3();
    const position = new THREE.Vector3();
    const lookAt = new THREE.Vector3();
    const pipeSpline = new THREE.CatmullRomCurve3([
      new THREE.Vector3(0, 10, -10),
      new THREE.Vector3(10, 0, -10),
      new THREE.Vector3(20, 0, 0),
      new THREE.Vector3(30, 0, 10),
      new THREE.Vector3(30, 0, 20),
      new THREE.Vector3(20, 0, 30),
      new THREE.Vector3(10, 0, 30),
      new THREE.Vector3(0, 0, 30),
      new THREE.Vector3(-10, 10, 30),
      new THREE.Vector3(-10, 20, 30),
      new THREE.Vector3(0, 30, 30),
      new THREE.Vector3(10, 30, 30),
      new THREE.Vector3(20, 30, 15),
      new THREE.Vector3(10, 30, 10),
      new THREE.Vector3(0, 30, 10),
      new THREE.Vector3(-10, 20, 10),
      new THREE.Vector3(-10, 10, 10),
      new THREE.Vector3(0, 0, 10),
      new THREE.Vector3(10, -10, 10),
      new THREE.Vector3(20, -15, 10),
      new THREE.Vector3(30, -15, 10),
      new THREE.Vector3(40, -15, 10),
      new THREE.Vector3(50, -15, 10),
      new THREE.Vector3(60, 0, 10),
      new THREE.Vector3(70, 0, 0),
      new THREE.Vector3(80, 0, 0),
      new THREE.Vector3(90, 0, 0),
      new THREE.Vector3(100, 0, 0)
    ]);
    const sampleClosedSpline = new THREE.CatmullRomCurve3([
      new THREE.Vector3(0, -40, -40),
      new THREE.Vector3(0, 40, -40),
      new THREE.Vector3(0, 140, -40),
      new THREE.Vector3(0, 40, 40),
      new THREE.Vector3(0, -40, 40)
    ]);
    sampleClosedSpline.curveType = "catmullrom";
    sampleClosedSpline.closed = true;
    const splines = {
      GrannyKnot: new Curves.GrannyKnot(),
      HeartCurve: new Curves.HeartCurve(3.5),
      VivianiCurve: new Curves.VivianiCurve(70),
      KnotCurve: new Curves.KnotCurve(),
      HelixCurve: new Curves.HelixCurve(),
      TrefoilKnot: new Curves.TrefoilKnot(),
      TorusKnot: new Curves.TorusKnot(20),
      CinquefoilKnot: new Curves.CinquefoilKnot(20),
      TrefoilPolynomialKnot: new Curves.TrefoilPolynomialKnot(14),
      FigureEightPolynomialKnot: new Curves.FigureEightPolynomialKnot(),
      DecoratedTorusKnot4a: new Curves.DecoratedTorusKnot4a(),
      DecoratedTorusKnot4b: new Curves.DecoratedTorusKnot4b(),
      DecoratedTorusKnot5a: new Curves.DecoratedTorusKnot5a(),
      DecoratedTorusKnot5c: new Curves.DecoratedTorusKnot5c(),
      PipeSpline: pipeSpline,
      SampleClosedSpline: sampleClosedSpline
    };
    let parent, tubeGeometry, mesh;
    const params = {
      spline: "GrannyKnot",
      scale: 4,
      extrusionSegments: 100,
      radiusSegments: 3,
      closed: true,
      animationView: false,
      lookAhead: false,
      cameraHelper: false
    };
    const material = new THREE.MeshLambertMaterial({ color: 16711935 });
    const wireframeMaterial = new THREE.MeshBasicMaterial({
      color: 0,
      opacity: 0.3,
      wireframe: true,
      transparent: true
    });
    function addTube() {
      if (mesh !== void 0) {
        parent.remove(mesh);
        mesh.geometry.dispose();
      }
      const extrudePath = splines[params.spline];
      tubeGeometry = new THREE.TubeGeometry(
        extrudePath,
        params.extrusionSegments,
        2,
        params.radiusSegments,
        params.closed
      );
      addGeometry(tubeGeometry);
      setScale();
    }
    function setScale() {
      mesh.scale.set(params.scale, params.scale, params.scale);
    }
    function addGeometry(geometry) {
      mesh = new THREE.Mesh(geometry, material);
      const wireframe = new THREE.Mesh(geometry, wireframeMaterial);
      mesh.add(wireframe);
      parent.add(mesh);
    }
    function animateCamera() {
      cameraHelper.visible = params.cameraHelper;
      cameraEye.visible = params.cameraHelper;
    }
    init();
    function init() {
      camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 0.01, 1e4);
      camera.position.set(0, 50, 500);
      scene = new THREE.Scene();
      scene.background = new THREE.Color(15790320);
      scene.add(new THREE.AmbientLight(16777215));
      const light = new THREE.DirectionalLight(16777215, 1.5);
      light.position.set(0, 0, 1);
      scene.add(light);
      parent = new THREE.Object3D();
      scene.add(parent);
      splineCamera = new THREE.PerspectiveCamera(
        84,
        window.innerWidth / window.innerHeight,
        0.01,
        1e3
      );
      parent.add(splineCamera);
      cameraHelper = new THREE.CameraHelper(splineCamera);
      scene.add(cameraHelper);
      addTube();
      cameraEye = new THREE.Mesh(
        new THREE.SphereGeometry(5),
        new THREE.MeshBasicMaterial({ color: 14540253 })
      );
      parent.add(cameraEye);
      cameraHelper.visible = params.cameraHelper;
      cameraEye.visible = params.cameraHelper;
      renderer = new THREE.WebGLRenderer({ antialias: true, canvas });
      renderer.setPixelRatio(window.devicePixelRatio);
      renderer.setSize(window.innerWidth, window.innerHeight);
      renderer.setAnimationLoop(animate);
      stats = new Stats(renderer);
      const gui = new GUI({ width: 285 });
      const folderGeometry = gui.addFolder("Geometry");
      folderGeometry.add(params, "spline", Object.keys(splines)).onChange(function() {
        addTube();
      });
      folderGeometry.add(params, "scale", 2, 10).step(2).onChange(function() {
        setScale();
      });
      folderGeometry.add(params, "extrusionSegments", 50, 500).step(50).onChange(function() {
        addTube();
      });
      folderGeometry.add(params, "radiusSegments", 2, 12).step(1).onChange(function() {
        addTube();
      });
      folderGeometry.add(params, "closed").onChange(function() {
        addTube();
      });
      folderGeometry.open();
      const folderCamera = gui.addFolder("Camera");
      folderCamera.add(params, "animationView").onChange(function() {
        animateCamera();
      });
      folderCamera.add(params, "lookAhead").onChange(function() {
        animateCamera();
      });
      folderCamera.add(params, "cameraHelper").onChange(function() {
        animateCamera();
      });
      folderCamera.open();
      const controls = new OrbitControls(camera, renderer.domElement);
      controls.minDistance = 100;
      controls.maxDistance = 2e3;
      window.addEventListener("resize", onWindowResize);
      needToDispose(renderer, scene, controls);
    }
    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 = Date.now();
      const looptime = 20 * 1e3;
      const t = time % looptime / looptime;
      tubeGeometry.parameters.path.getPointAt(t, position);
      position.multiplyScalar(params.scale);
      const segments = tubeGeometry.tangents.length;
      const pickt = t * segments;
      const pick = Math.floor(pickt);
      const pickNext = (pick + 1) % segments;
      binormal.subVectors(tubeGeometry.binormals[pickNext], tubeGeometry.binormals[pick]);
      binormal.multiplyScalar(pickt - pick).add(tubeGeometry.binormals[pick]);
      tubeGeometry.parameters.path.getTangentAt(t, direction);
      const offset = 15;
      normal.copy(binormal).cross(direction);
      position.add(normal.clone().multiplyScalar(offset));
      splineCamera.position.copy(position);
      cameraEye.position.copy(position);
      tubeGeometry.parameters.path.getPointAt(
        (t + 30 / tubeGeometry.parameters.path.getLength()) % 1,
        lookAt
      );
      lookAt.multiplyScalar(params.scale);
      if (!params.lookAhead) lookAt.copy(position).add(direction);
      splineCamera.matrix.lookAt(splineCamera.position, lookAt, normal);
      splineCamera.quaternion.setFromRotationMatrix(splineCamera.matrix);
      cameraHelper.update();
      renderer.render(scene, params.animationView === true ? splineCamera : camera);
    }
  }
};
export {
  exampleInfo as default
};

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245

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_geometry_extrude_splines ​

webgl_geometry_extrude_splines