webgl_geometry_shapes
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。
js
import * as THREE from "three";
/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
name: "webgl_geometry_shapes",
useLoaders: [],
info: [
[
{
tag: "text",
content: "Simple procedurally-generated shapes"
}
]
],
init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
let stats;
let camera, scene, renderer;
let group;
let targetRotation = 0;
let targetRotationOnPointerDown = 0;
let pointerX = 0;
let pointerXOnPointerDown = 0;
let windowHalfX = window.innerWidth / 2;
init();
function init() {
scene = new THREE.Scene();
scene.background = new THREE.Color(15790320);
camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 1e3);
camera.position.set(0, 150, 500);
scene.add(camera);
const light = new THREE.PointLight(16777215, 2.5, 0, 0);
camera.add(light);
group = new THREE.Group();
group.position.y = 50;
scene.add(group);
const loader = new THREE.TextureLoader();
const texture = loader.load("textures/uv_grid_opengl.jpg");
texture.colorSpace = THREE.SRGBColorSpace;
texture.wrapS = texture.wrapT = THREE.RepeatWrapping;
texture.repeat.set(8e-3, 8e-3);
function addShape(shape, extrudeSettings2, color, x2, y2, z, rx, ry, rz, s) {
let geometry = new THREE.ShapeGeometry(shape);
let mesh = new THREE.Mesh(
geometry,
new THREE.MeshPhongMaterial({ side: THREE.DoubleSide, map: texture })
);
mesh.position.set(x2, y2, z - 175);
mesh.rotation.set(rx, ry, rz);
mesh.scale.set(s, s, s);
group.add(mesh);
geometry = new THREE.ShapeGeometry(shape);
mesh = new THREE.Mesh(
geometry,
new THREE.MeshPhongMaterial({ color, side: THREE.DoubleSide })
);
mesh.position.set(x2, y2, z - 125);
mesh.rotation.set(rx, ry, rz);
mesh.scale.set(s, s, s);
group.add(mesh);
geometry = new THREE.ExtrudeGeometry(shape, extrudeSettings2);
mesh = new THREE.Mesh(geometry, new THREE.MeshPhongMaterial({ color }));
mesh.position.set(x2, y2, z - 75);
mesh.rotation.set(rx, ry, rz);
mesh.scale.set(s, s, s);
group.add(mesh);
addLineShape(shape, color, x2, y2, z, rx, ry, rz, s);
}
function addLineShape(shape, color, x2, y2, z, rx, ry, rz, s) {
shape.autoClose = true;
const points = shape.getPoints();
const spacedPoints = shape.getSpacedPoints(50);
const geometryPoints = new THREE.BufferGeometry().setFromPoints(points);
const geometrySpacedPoints = new THREE.BufferGeometry().setFromPoints(spacedPoints);
let line = new THREE.Line(geometryPoints, new THREE.LineBasicMaterial({ color }));
line.position.set(x2, y2, z - 25);
line.rotation.set(rx, ry, rz);
line.scale.set(s, s, s);
group.add(line);
line = new THREE.Line(geometrySpacedPoints, new THREE.LineBasicMaterial({ color }));
line.position.set(x2, y2, z + 25);
line.rotation.set(rx, ry, rz);
line.scale.set(s, s, s);
group.add(line);
let particles = new THREE.Points(
geometryPoints,
new THREE.PointsMaterial({ color, size: 4 })
);
particles.position.set(x2, y2, z + 75);
particles.rotation.set(rx, ry, rz);
particles.scale.set(s, s, s);
group.add(particles);
particles = new THREE.Points(
geometrySpacedPoints,
new THREE.PointsMaterial({ color, size: 4 })
);
particles.position.set(x2, y2, z + 125);
particles.rotation.set(rx, ry, rz);
particles.scale.set(s, s, s);
group.add(particles);
}
const californiaPts = [];
californiaPts.push(new THREE.Vector2(610, 320));
californiaPts.push(new THREE.Vector2(450, 300));
californiaPts.push(new THREE.Vector2(392, 392));
californiaPts.push(new THREE.Vector2(266, 438));
californiaPts.push(new THREE.Vector2(190, 570));
californiaPts.push(new THREE.Vector2(190, 600));
californiaPts.push(new THREE.Vector2(160, 620));
californiaPts.push(new THREE.Vector2(160, 650));
californiaPts.push(new THREE.Vector2(180, 640));
californiaPts.push(new THREE.Vector2(165, 680));
californiaPts.push(new THREE.Vector2(150, 670));
californiaPts.push(new THREE.Vector2(90, 737));
californiaPts.push(new THREE.Vector2(80, 795));
californiaPts.push(new THREE.Vector2(50, 835));
californiaPts.push(new THREE.Vector2(64, 870));
californiaPts.push(new THREE.Vector2(60, 945));
californiaPts.push(new THREE.Vector2(300, 945));
californiaPts.push(new THREE.Vector2(300, 743));
californiaPts.push(new THREE.Vector2(600, 473));
californiaPts.push(new THREE.Vector2(626, 425));
californiaPts.push(new THREE.Vector2(600, 370));
californiaPts.push(new THREE.Vector2(610, 320));
for (let i = 0; i < californiaPts.length; i++) californiaPts[i].multiplyScalar(0.25);
const californiaShape = new THREE.Shape(californiaPts);
const triangleShape = new THREE.Shape().moveTo(80, 20).lineTo(40, 80).lineTo(120, 80).lineTo(80, 20);
const x = 0, y = 0;
const heartShape = new THREE.Shape().moveTo(x + 25, y + 25).bezierCurveTo(x + 25, y + 25, x + 20, y, x, y).bezierCurveTo(x - 30, y, x - 30, y + 35, x - 30, y + 35).bezierCurveTo(x - 30, y + 55, x - 10, y + 77, x + 25, y + 95).bezierCurveTo(x + 60, y + 77, x + 80, y + 55, x + 80, y + 35).bezierCurveTo(x + 80, y + 35, x + 80, y, x + 50, y).bezierCurveTo(x + 35, y, x + 25, y + 25, x + 25, y + 25);
const sqLength = 80;
const squareShape = new THREE.Shape().moveTo(0, 0).lineTo(0, sqLength).lineTo(sqLength, sqLength).lineTo(sqLength, 0).lineTo(0, 0);
const roundedRectShape = new THREE.Shape();
(function roundedRect(ctx, x2, y2, width, height, radius) {
ctx.moveTo(x2, y2 + radius);
ctx.lineTo(x2, y2 + height - radius);
ctx.quadraticCurveTo(x2, y2 + height, x2 + radius, y2 + height);
ctx.lineTo(x2 + width - radius, y2 + height);
ctx.quadraticCurveTo(x2 + width, y2 + height, x2 + width, y2 + height - radius);
ctx.lineTo(x2 + width, y2 + radius);
ctx.quadraticCurveTo(x2 + width, y2, x2 + width - radius, y2);
ctx.lineTo(x2 + radius, y2);
ctx.quadraticCurveTo(x2, y2, x2, y2 + radius);
})(roundedRectShape, 0, 0, 50, 50, 20);
const trackShape = new THREE.Shape().moveTo(40, 40).lineTo(40, 160).absarc(60, 160, 20, Math.PI, 0, true).lineTo(80, 40).absarc(60, 40, 20, 2 * Math.PI, Math.PI, true);
const circleRadius = 40;
const circleShape = new THREE.Shape().moveTo(0, circleRadius).quadraticCurveTo(circleRadius, circleRadius, circleRadius, 0).quadraticCurveTo(circleRadius, -40, 0, -40).quadraticCurveTo(-40, -40, -40, 0).quadraticCurveTo(-40, circleRadius, 0, circleRadius);
const fishShape = new THREE.Shape().moveTo(x, y).quadraticCurveTo(x + 50, y - 80, x + 90, y - 10).quadraticCurveTo(x + 100, y - 10, x + 115, y - 40).quadraticCurveTo(x + 115, y, x + 115, y + 40).quadraticCurveTo(x + 100, y + 10, x + 90, y + 10).quadraticCurveTo(x + 50, y + 80, x, y);
const arcShape = new THREE.Shape().moveTo(50, 10).absarc(10, 10, 40, 0, Math.PI * 2, false);
const holePath = new THREE.Path().moveTo(20, 10).absarc(10, 10, 10, 0, Math.PI * 2, true);
arcShape.holes.push(holePath);
const smileyShape = new THREE.Shape().moveTo(80, 40).absarc(40, 40, 40, 0, Math.PI * 2, false);
const smileyEye1Path = new THREE.Path().moveTo(35, 20).absellipse(25, 20, 10, 10, 0, Math.PI * 2, true);
const smileyEye2Path = new THREE.Path().moveTo(65, 20).absarc(55, 20, 10, 0, Math.PI * 2, true);
const smileyMouthPath = new THREE.Path().moveTo(20, 40).quadraticCurveTo(40, 60, 60, 40).bezierCurveTo(70, 45, 70, 50, 60, 60).quadraticCurveTo(40, 80, 20, 60).quadraticCurveTo(5, 50, 20, 40);
smileyShape.holes.push(smileyEye1Path);
smileyShape.holes.push(smileyEye2Path);
smileyShape.holes.push(smileyMouthPath);
const splinepts = [];
splinepts.push(new THREE.Vector2(70, 20));
splinepts.push(new THREE.Vector2(80, 90));
splinepts.push(new THREE.Vector2(-30, 70));
splinepts.push(new THREE.Vector2(0, 0));
const splineShape = new THREE.Shape().moveTo(0, 0).splineThru(splinepts);
const extrudeSettings = {
depth: 8,
bevelEnabled: true,
bevelSegments: 2,
steps: 2,
bevelSize: 1,
bevelThickness: 1
};
addShape(californiaShape, extrudeSettings, 15761408, -300, -100, 0, 0, 0, 0, 1);
addShape(triangleShape, extrudeSettings, 8421616, -180, 0, 0, 0, 0, 0, 1);
addShape(roundedRectShape, extrudeSettings, 32768, -150, 150, 0, 0, 0, 0, 1);
addShape(trackShape, extrudeSettings, 32896, 200, -100, 0, 0, 0, 0, 1);
addShape(squareShape, extrudeSettings, 16624, 150, 100, 0, 0, 0, 0, 1);
addShape(heartShape, extrudeSettings, 15728640, 60, 100, 0, 0, 0, Math.PI, 1);
addShape(circleShape, extrudeSettings, 61440, 120, 250, 0, 0, 0, 0, 1);
addShape(fishShape, extrudeSettings, 4210752, -60, 200, 0, 0, 0, 0, 1);
addShape(smileyShape, extrudeSettings, 15728880, -200, 250, 0, 0, 0, Math.PI, 1);
addShape(arcShape, extrudeSettings, 8404992, 150, 0, 0, 0, 0, 0, 1);
addShape(splineShape, extrudeSettings, 8421504, -50, -100, 0, 0, 0, 0, 1);
addLineShape(arcShape.holes[0], 8404992, 150, 0, 0, 0, 0, 0, 1);
for (let i = 0; i < smileyShape.holes.length; i += 1) {
addLineShape(smileyShape.holes[i], 15728880, -200, 250, 0, 0, 0, Math.PI, 1);
}
renderer = new THREE.WebGLRenderer({ antialias: true, canvas });
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setAnimationLoop(animate);
stats = new Stats(renderer);
canvas.addEventListener("pointerdown", onPointerDown);
window.addEventListener("resize", onWindowResize);
needToDispose(renderer, scene);
}
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function onPointerDown(event) {
if (event.isPrimary === false) return;
pointerXOnPointerDown = event.clientX - windowHalfX;
targetRotationOnPointerDown = targetRotation;
canvas.addEventListener("pointermove", onPointerMove);
canvas.addEventListener("pointerup", onPointerUp);
}
function onPointerMove(event) {
if (event.isPrimary === false) return;
pointerX = event.clientX - windowHalfX;
targetRotation = targetRotationOnPointerDown + (pointerX - pointerXOnPointerDown) * 0.02;
}
function onPointerUp(event) {
if (event.isPrimary === false) return;
canvas.removeEventListener("pointermove", onPointerMove);
canvas.removeEventListener("pointerup", onPointerUp);
}
function animate() {
render();
stats.update();
}
function render() {
group.rotation.y += (targetRotation - group.rotation.y) * 0.05;
renderer.render(scene, camera);
}
}
};
export {
exampleInfo as default
};ts
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;