webgl_morphtargets
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";
import { OrbitControls } from "three/examples/jsm/controls/OrbitControls.js";
/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
name: "webgl_morphtargets",
useLoaders: [],
info: [
[
{ tag: "a", link: "https://threejs.org", content: "three.js" },
{ tag: "text", content: "- morph targets" }
],
[
{
tag: "text",
content: "by"
},
{ tag: "a", link: "https://discoverthreejs.com/", content: "Discover three.js" }
]
],
init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
let camera, scene, renderer, mesh;
init();
function init() {
scene = new THREE.Scene();
scene.background = new THREE.Color(9419988);
camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 20);
camera.position.z = 10;
scene.add(camera);
scene.add(new THREE.AmbientLight(9419988, 1.5));
const pointLight = new THREE.PointLight(16777215, 200);
camera.add(pointLight);
const geometry = createGeometry();
const material = new THREE.MeshPhongMaterial({
color: 16711680,
flatShading: true
});
mesh = new THREE.Mesh(geometry, material);
scene.add(mesh);
initGUI();
renderer = new THREE.WebGLRenderer({ antialias: true, canvas });
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setAnimationLoop(function() {
renderer.render(scene, camera);
});
const controls = new OrbitControls(camera, renderer.domElement);
controls.enableZoom = false;
window.addEventListener("resize", onWindowResize);
needToDispose(renderer, scene, controls);
}
function createGeometry() {
const geometry = new THREE.BoxGeometry(2, 2, 2, 32, 32, 32);
geometry.morphAttributes.position = [];
const positionAttribute = geometry.attributes.position;
const spherePositions = [];
const twistPositions = [];
const direction = new THREE.Vector3(1, 0, 0);
const vertex = new THREE.Vector3();
for (let i = 0; i < positionAttribute.count; i++) {
const x = positionAttribute.getX(i);
const y = positionAttribute.getY(i);
const z = positionAttribute.getZ(i);
spherePositions.push(
x * Math.sqrt(1 - y * y / 2 - z * z / 2 + y * y * z * z / 3),
y * Math.sqrt(1 - z * z / 2 - x * x / 2 + z * z * x * x / 3),
z * Math.sqrt(1 - x * x / 2 - y * y / 2 + x * x * y * y / 3)
);
vertex.set(x * 2, y, z);
vertex.applyAxisAngle(direction, Math.PI * x / 2).toArray(twistPositions, twistPositions.length);
}
geometry.morphAttributes.position[0] = new THREE.Float32BufferAttribute(spherePositions, 3);
geometry.morphAttributes.position[1] = new THREE.Float32BufferAttribute(twistPositions, 3);
return geometry;
}
function initGUI() {
const params = {
Spherify: 0,
Twist: 0
};
const gui = new GUI({ title: "Morph Targets" });
gui.add(params, "Spherify", 0, 1).step(0.01).onChange(function(value) {
mesh.morphTargetInfluences[0] = value;
});
gui.add(params, "Twist", 0, 1).step(0.01).onChange(function(value) {
mesh.morphTargetInfluences[1] = value;
});
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
}
};
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;